1 <?xml version="1.0" encoding="utf-8" ?> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 4 <head> 5 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 6 <title>Magick++ API: Working with Images</title> 7 <link rel="stylesheet" href="magick.css" type="text/css" /> 8 </head> 9 <body> 10 <div class="doc-section"> 11 <center> 12 <h1> Magick::Image Class</h1> 13 </center> 14 <h4> Quick Contents</h4> 15 <ul> 16 <li> <a href="Image.html#BLOBs">BLOBs</a> </li> 17 <li> <a href="Image.html#Constructors">Constructors</a> </li> 18 <li> <a href="Image.html#Image%20Manipulation%20Methods">Image Manipulation 19 Methods</a> </li> 20 <li> <a href="Image.html#Image%20Attributes">Image Attributes</a> </li> 21 <li> <a href="Image.html#Raw%20Image%20Pixel%20Access">Low-Level Image Pixel 22 Access</a> </li> 23 </ul> 24 <p>Image is the primary object in Magick++ and represents 25 a single image frame (see <a href="ImageDesign.html">design</a> ). The 26 <a href="STL.html">STL interface</a> <b>must</b> be used to operate on 27 image sequences or images (e.g. of format GIF, TIFF, MIFF, Postscript, 28 & MNG) which are comprized of multiple image frames. Individual 29 frames of a multi-frame image may be requested by adding array-style 30 notation to the end of the file name (e.g. "animation.gif[3]" retrieves 31 the fourth frame of a GIF animation.  Various image manipulation 32 operations may be applied to the image. Attributes may be set on the 33 image to influence the operation of the manipulation operations. The <a 34 href="Pixels.html"> Pixels</a> class provides low-level access to 35 image 36 pixels. As a convenience, including <tt><font color="#663366"><Magick++.h></font></tt> 37 is sufficient in order to use the complete Magick++ API. The Magick++ 38 API is enclosed within the <i>Magick</i> namespace so you must either 39 add the prefix "<tt> Magick::</tt> " to each class/enumeration name or 40 add 41 the statement "<tt> using namespace Magick;</tt>" after including the <tt>Magick++.h</tt> 42 header.</p> 43 <p>The preferred way to allocate Image objects is via automatic 44 allocation (on the stack). There is no concern that allocating Image 45 objects on the stack will excessively enlarge the stack since Magick++ 46 allocates all large data objects (such as the actual image data) from 47 the heap. Use of automatic allocation is preferred over explicit 48 allocation (via <i>new</i>) since it is much less error prone and 49 allows use of C++ scoping rules to avoid memory leaks. Use of automatic 50 allocation allows Magick++ objects to be assigned and copied just like 51 the C++ intrinsic data types (e.g. '<i>int</i> '), leading to clear and 52 easy to read code. Use of automatic allocation leads to naturally 53 exception-safe code since if an exception is thrown, the object is 54 automagically deallocated once the stack unwinds past the scope of the 55 allocation (not the case for objects allocated via <i>new</i> ). </p> 56 <p>Image is very easy to use. For example, here is a the source to a 57 program which reads an image, crops it, and writes it to a new file 58 (the 59 exception handling is optional but strongly recommended): </p> 60 <pre class="code"> 61 #include <Magick++.h> 62 #include <iostream> 63 using namespace std; 64 using namespace Magick; 65 int main(int argc,char **argv) 66 { 67 InitializeMagick(*argv); 68 69 // Construct the image object. Seperating image construction from the 70 // the read operation ensures that a failure to read the image file 71 // doesn't render the image object useless. 72 Image image; 73 try { 74 // Read a file into image object 75 image.read( "girl.gif" ); 76 77 // Crop the image to specified size (width, height, xOffset, yOffset) 78 image.crop( Geometry(100,100, 100, 100) ); 79 80 // Write the image to a file 81 image.write( "x.gif" ); 82 } 83 catch( Exception &error_ ) 84 { 85 cout << "Caught exception: " << error_.what() << endl; 86 return 1; 87 } 88 return 0; 89 } 90 </pre> 91 The following is the source to a program which illustrates the use of 92 Magick++'s efficient reference-counted assignment and copy-constructor 93 operations which minimize use of memory and eliminate unncessary copy 94 operations (allowing Image objects to be efficiently assigned, and 95 copied into containers).  The program accomplishes the 96 following: 97 <ol> 98 <li> Read master image.</li> 99 <li> Assign master image to second image.</li> 100 <li> Resize second image to the size 640x480.</li> 101 <li> Assign master image to a third image.</li> 102 <li> Resize third image to the size 800x600.</li> 103 <li> Write the second image to a file.</li> 104 <li> Write the third image to a file.</li> 105 </ol> 106 <pre class="code"> 107 #include <Magick++.h> 108 #include <iostream> 109 using namespace std; 110 using namespace Magick; 111 int main(int argc,char **argv) 112 { 113 InitializeMagick(*argv); 114 115 Image master("horse.jpg"); 116 Image second = master; 117 second.resize("640x480"); 118 Image third = master; 119 third.resize("800x600"); 120 second.write("horse640x480.jpg"); 121 third.write("horse800x600.jpg"); 122 return 0; 123 } 124 </pre> 125 During the entire operation, a maximum of three images exist in memory 126 and the image data is never copied. 127 <p>The following is the source for another simple program which creates 128 a 100 by 100 pixel white image with a red pixel in the center and 129 writes it to a file: </p> 130 <pre class="code"> 131 #include <Magick++.h> 132 using namespace std; 133 using namespace Magick; 134 int main(int argc,char **argv) 135 { 136 InitializeMagick(*argv); 137 Image image( "100x100", "white" ); 138 image.pixelColor( 49, 49, "red" ); 139 image.write( "red_pixel.png" ); 140 return 0; 141 } 142 </pre> 143 If you wanted to change the color image to grayscale, you could add the 144 lines: 145 <pre class="code"> 146 image.quantizeColorSpace( GRAYColorspace ); 147 image.quantizeColors( 256 ); 148 image.quantize( ); 149 </pre> 150 <p>or, more simply: </p> 151 <pre class="code"> 152 image.type( GrayscaleType ); 153 </pre> 154 <p>prior to writing the image. </p> 155 <center> 156 <h3> <a name="BLOBs"></a> BLOBs</h3> 157 </center> 158 While encoded images (e.g. JPEG) are most often written-to and 159 read-from a disk file, encoded images may also reside in memory. 160 Encoded 161 images in memory are known as BLOBs (Binary Large OBjects) and may be 162 represented using the <a href="Blob.html">Blob</a> class. The encoded 163 image may be initially placed in memory by reading it directly from a 164 file, reading the image from a database, memory-mapped from a disk 165 file, or could be written to memory by Magick++. Once the encoded image 166 has been placed within a Blob, it may be read into a Magick++ Image via 167 a <a href="Image.html#constructor_blob">constructor</a> or <a href="Image.html#read">read()</a> 168 . Likewise, a Magick++ image may be written to a Blob via <a 169 href="Image.html#write"> write()</a> . 170 <p>An example of using Image to write to a Blob follows: <br /> 171   </p> 172 <pre class="code"> 173 #include >Magick++.h> 174 using namespace std; 175 using namespace Magick; 176 int main(int argc,char **argv) 177 { 178 InitializeMagick(*argv); 179 180 // Read GIF file from disk 181 Image image( "giraffe.gif" ); 182 // Write to BLOB in JPEG format 183 Blob blob; 184 image.magick( "JPEG" ) // Set JPEG output format 185 image.write( &blob ); 186 187 [ Use BLOB data (in JPEG format) here ] 188 189 return 0; 190 } 191 </pre> 192 <p><br /> 193 likewise, to read an image from a Blob, you could use one of the 194 following examples: </p> 195 <p>[ <font color="#000000">Entry condition for the following examples 196 is that <i>data</i> is pointer to encoded image data and <i>length</i> 197 represents the size of the data</font> ] </p> 198 <pre class="code"> 199 Blob blob( data, length ); 200 Image image( blob ); 201 </pre> 202 or 203 <pre class="code"> 204 Blob blob( data, length ); 205 Image image; 206 image.read( blob); 207 </pre> 208 some images do not contain their size or format so the size and format must be specified in advance: 209 <pre class="code"> 210 Blob blob( data, length ); 211 Image image; 212 image.size( "640x480") 213 image.magick( "RGBA" ); 214 image.read( blob); 215 </pre> 216 <center> 217 <h3> <a name="Constructors"></a> Constructors</h3> 218 </center> 219 Image may be constructed in a number of ways. It may be constructed 220 from a file, a URL, or an encoded image (e.g. JPEG) contained in an 221 in-memory <a href="Blob.html"> BLOB</a> . The available Image 222 constructors are shown in the following table: <br /> 223   <br /> 224   225 <table bgcolor="#ffffff" border="1" width="100%"> 226 <caption><b>Image Constructors</b></caption> <tbody> 227 <tr> 228 <td> 229 <center><b>Signature</b></center> 230 </td> 231 <td> 232 <center><b>Description</b></center> 233 </td> 234 </tr> 235 <tr> 236 <td><font size="-1">const std::string &imageSpec_</font></td> 237 <td><font size="-1">Construct Image by reading from file or URL 238 specified by <i>imageSpec_</i>. Use array notation (e.g. filename[9]) 239 to select a specific scene from a multi-frame image.</font></td> 240 </tr> 241 <tr> 242 <td><font size="-1">const Geometry &size_, const <a 243 href="Color.html"> Color</a> &color_</font></td> 244 <td><font size="-1">Construct a blank image canvas of specified 245 size and color</font></td> 246 </tr> 247 <tr> 248 <td><a name="constructor_blob"></a> <font size="-1">const <a 249 href="Blob.html">Blob</a> &blob_</font></td> 250 <td rowspan="5"><font size="-1">Construct Image by reading from 251 encoded image data contained in an in-memory <a href="Blob.html">BLOB</a> 252 . Depending on the constructor arguments, the Blob <a href="Image.html#size">size</a> 253 , <a href="Image.html#depth">depth</a> , <a href="Image.html#magick">magick</a> (format) 254 may 255 also be specified. Some image formats require that size be specified. 256 The default ImageMagick uses for depth depends on the compiled-in 257 Quantum size (8 or 16).  If ImageMagick's Quantum size does not 258 match that of the image, the depth may need to be specified. 259 ImageMagick can usually automagically detect the image's format. 260 When a format can't be automagically detected, the format (<a 261 href="Image.html#magick">magick</a> ) must be specified.</font></td> 262 </tr> 263 <tr> 264 <td><font size="-1">const <a href="Blob.html">Blob</a> 265 &blob_, const <a href="Geometry.html">Geometry</a> &size_</font></td> 266 </tr> 267 <tr> 268 <td><font size="-1">const <a href="Blob.html">Blob</a> 269 &blob_, const <a href="Geometry.html">Geometry</a> &size, 270 size_t depth</font></td> 271 </tr> 272 <tr> 273 <td><font size="-1">const <a href="Blob.html">Blob</a> 274 &blob_, const <a href="Geometry.html">Geometry</a> &size, 275 size_t depth_, const string &magick_</font></td> 276 </tr> 277 <tr> 278 <td><font size="-1">const <a href="Blob.html">Blob</a> 279 &blob_, const <a href="Geometry.html">Geometry</a> &size, 280 const 281 string &magick_</font></td> 282 </tr> 283 <tr> 284 <td><font size="-1">const size_t width_, </font> <br /> 285 <font size="-1">const size_t height_,</font> <br /> 286 <font size="-1">std::string map_,</font> <br /> 287 <font size="-1">const <a href="Enumerations.html#StorageType"> 288 StorageType</a> type_,</font> <br /> 289 <font size="-1">const void *pixels_</font></td> 290 <td><font size="-1">Construct a new Image based on an array of 291 image pixels. The pixel data must be in scanline order top-to-bottom. 292 The data can be character, short int, integer, float, or double. Float 293 and double require the pixels to be normalized [0..1]. The other types 294 are [0..MaxRGB].  For example, to create a 640x480 image from 295 unsigned red-green-blue character data, use</font> 296 <p><font size="-1">   Image image( 640, 480, "RGB", 297 0, pixels );</font> </p> 298 <p><font size="-1">The parameters are as follows:</font> <br /> 299  </p> 300 <table border="0" width="100%"> 301 <tbody> 302 <tr> 303 <td><font size="-1">width_</font></td> 304 <td><font size="-1">Width in pixels of the image.</font></td> 305 </tr> 306 <tr> 307 <td><font size="-1">height_</font></td> 308 <td><font size="-1">Height in pixels of the image.</font></td> 309 </tr> 310 <tr> 311 <td><font size="-1">map_</font></td> 312 <td><font size="-1">This character string can be any 313 combination or order of R = red, G = green, B = blue, A = alpha, C = 314 cyan, Y = yellow M = magenta, and K = black. The ordering reflects the 315 order of the pixels in the supplied pixel array.</font></td> 316 </tr> 317 <tr> 318 <td><font size="-1">type_</font></td> 319 <td><font size="-1"><a href="Enumerations.html#StorageType">Pixel 320 storage type</a> (CharPixel, ShortPixel, IntegerPixel, FloatPixel, or 321 DoublePixel)</font></td> 322 </tr> 323 <tr> 324 <td><font size="-1">pixels_</font></td> 325 <td><font size="-1">This array of values contain the pixel 326 components as defined by the map_ and type_ parameters. The length of 327 the arrays must equal the area specified by the width_ and height_ 328 values and type_ parameters.</font></td> 329 </tr> 330 </tbody> 331 </table> 332 </td> 333 </tr> 334 </tbody> 335 </table> 336 <center> 337 <h3> <a name="Image Manipulation Methods"></a> Image Manipulation 338 Methods</h3> 339 </center> 340 <i>Image</i> supports access to all the single-image (versus 341 image-list) manipulation operations provided by the ImageMagick 342 library. If you 343 must process a multi-image file (such as an animation), the <a 344 href="STL.html"> STL interface</a> , which provides a multi-image 345 abstraction on top of <i>Image</i>, must be used. 346 <p>Image manipulation methods are very easy to use.  For example: </p> 347 <pre class="code"> 348 Image image; 349 image.read("myImage.tiff"); 350 image.addNoise(GaussianNoise); 351 image.write("myImage.tiff"); 352 </pre> 353 adds gaussian noise to the image file "myImage.tiff". 354 <p>The operations supported by Image are shown in the following table: <br /> 355  </p> 356 <table border="1"> 357 <caption><b>Image Image Manipulation Methods</b></caption> <tbody> 358 <tr align="center"> 359 <td><b>Method</b></td> 360 <td><b>Signature(s)</b></td> 361 <td><b>Description</b></td> 362 </tr> 363 <tr> 364 <td style="text-align: center;" valign="middle"> 365 <div style="text-align:center"><a name="adaptiveThreshold"></a> <font 366 size="-1">adaptiveThreshold<br /> 367 </font></div> 368 </td> 369 <td valign="middle"><font size="-1">size_t width, size_t 370 height, size_t offset = 0<br /> 371 </font></td> 372 <td valign="top"><font size="-1">Apply adaptive thresholding to 373 the image. Adaptive thresholding is useful if the ideal threshold level 374 is not known in advance, or if the illumination gradient is not 375 constant 376 across the image. Adaptive thresholding works by evaulating the mean 377 (average) of a pixel region (size specified by <i>width</i> and <i>height</i>) 378 and using the mean as the thresholding value. In order to remove 379 residual noise from the background, the threshold may be adjusted by 380 subtracting a constant <i>offset</i> (default zero) from the mean to 381 compute the threshold.</font><br /> 382 </td> 383 </tr> 384 <tr> 385 <td style="text-align: center;"> 386 <center><a name="addNoise"></a> <font size="-1">addNoise</font></center> 387 </td> 388 <td><font size="-1"><a href="Enumerations.html#NoiseType">NoiseType</a> 389 noiseType_</font></td> 390 <td><font size="-1">Add noise to image with specified noise type.</font></td> 391 </tr> 392 <tr> 393 <td style="vertical-align: middle; text-align: center;"><small><a 394 name="addNoiseChannel"></a>addNoiseChannel<br /> 395 </small></td> 396 <td style="vertical-align: middle;"><small>const ChannelType 397 channel_, const NoiseType noiseType_<br /> 398 </small></td> 399 <td style="vertical-align: middle;"><small>Add noise to an image 400 channel with the specified noise type.</small><font size="-1"> The <span 401 style="font-style: italic;">channel_</span> parameter specifies the 402 channel to add noise to.  The </font><small>noiseType_ parameter 403 specifies the type of noise.<br /> 404 </small></td> 405 </tr> 406 <tr> 407 <td style="vertical-align: middle; text-align: center;"><small><a 408 name="affineTransform"></a>affineTransform<br /> 409 </small></td> 410 <td style="vertical-align: middle;"><small>const DrawableAffine 411 &affine<br /> 412 </small></td> 413 <td style="vertical-align: middle;"><small>Transform image by 414 specified affine (or free transform) matrix.<br /> 415 </small></td> 416 </tr> 417 <tr> 418 <td style="text-align: center;" rowspan="4"> 419 <center><a name="annotate"></a> <font size="-1">annotate</font></center> 420 </td> 421 <td><font size="-1">const std::string &text_, const <a 422 href="Geometry.html"> Geometry</a> &location_</font></td> 423 <td><font size="-1">Annotate using specified text, and placement 424 location</font></td> 425 </tr> 426 <tr> 427 <td><font size="-1">string text_, const <a href="Geometry.html">Geometry</a> 428 &boundingArea_, <a href="Enumerations.html#GravityType">GravityType</a> 429 gravity_</font></td> 430 <td><font size="-1">Annotate using specified text, bounding area, 431 and placement gravity. If <i>boundingArea_</i> is invalid, then 432 bounding area is entire image.</font></td> 433 </tr> 434 <tr> 435 <td><font size="-1">const std::string &text_, const <a 436 href="Geometry.html"> Geometry</a> &boundingArea_, <a 437 href="Enumerations.html#GravityType">GravityType</a> gravity_, double 438 degrees_, </font></td> 439 <td><font size="-1">Annotate with text using specified text, 440 bounding area, placement gravity, and rotation. If <i>boundingArea_</i> 441 is invalid, then bounding area is entire image.</font></td> 442 </tr> 443 <tr> 444 <td><font size="-1">const std::string &text_, <a 445 href="Enumerations.html#GravityType"> GravityType</a> gravity_</font></td> 446 <td><font size="-1">Annotate with text (bounding area is entire 447 image) and placement gravity.</font></td> 448 </tr> 449 <tr> 450 <td style="text-align: center;"> 451 <center><a name="blur"></a> <font size="-1">blur</font></center> 452 </td> 453 <td><font size="-1">const double radius_ = 1, const double sigma_ 454 = 0.5</font></td> 455 <td><font size="-1">Blur image. The <i>radius_ </i>parameter 456 specifies the radius of the Gaussian, in pixels, not counting the 457 center 458 pixel.  The <i>sigma_</i> parameter specifies the standard 459 deviation of the Laplacian, in pixels.</font></td> 460 </tr> 461 <tr> 462 <td style="vertical-align: middle; text-align: center;"><small><a 463 name="blurChannel"></a>blurChannel<br /> 464 </small></td> 465 <td style="vertical-align: middle;"><small>const ChannelType 466 channel_, const double radius_ = 0.0, const double sigma_ = 1.0<br /> 467 </small></td> 468 <td style="vertical-align: middle;"><font size="-1">Blur an image 469 channel. The <span style="font-style: italic;">channel_</span> 470 parameter specifies the channel to blur. The <i>radius_ </i>parameter 471 specifies the radius of the Gaussian, in pixels, not counting the 472 center 473 pixel.  The <i>sigma_</i> parameter specifies the standard 474 deviation of the Laplacian, in pixels.</font></td> 475 </tr> 476 <tr> 477 <td style="text-align: center;"> 478 <center><a name="border"></a> <font size="-1">border</font></center> 479 </td> 480 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 481 &geometry_ = "6x6+0+0"</font></td> 482 <td><font size="-1">Border image (add border to image).  The 483 color of the border is specified by the <i>borderColor</i> attribute.</font></td> 484 </tr> 485 <tr> 486 <td style="text-align: center;"> 487 <center><a name="cdl"></a> <font size="-1">cdl</font></center> 488 </td> 489 <td><font size="-1">const std::string &cdl_</font></td> 490 <td><font size="-1">color correct with a color decision list. See <a href="http://en.wikipedia.org/wiki/ASC_CDL">http://en.wikipedia.org/wiki/ASC_CDL</a> for details.</font></td> 491 </tr> 492 <tr> 493 <td style="text-align: center;"> 494 <center><a name="channel"></a> <font size="-1">channel</font></center> 495 </td> 496 <td><font size="-1"><a href="Enumerations.html#ChannelType">ChannelType</a> 497 layer_</font></td> 498 <td><font size="-1">Extract channel from image. Use this option 499 to extract a particular channel from  the image.  <i>MatteChannel</i> 500   for  example, is useful for extracting the opacity values 501 from an image.</font></td> 502 </tr> 503 <tr> 504 <td style="text-align: center;"> 505 <center><a name="charcoal"></a> <font size="-1">charcoal</font></center> 506 </td> 507 <td><font size="-1">const double radius_ = 1, const double sigma_ 508 = 0.5</font></td> 509 <td><font size="-1">Charcoal effect image (looks like charcoal 510 sketch). The <i>radius_</i> parameter specifies the radius of the 511 Gaussian, in pixels, not counting the center pixel.  The <i>sigma_</i> 512 parameter specifies the standard deviation of the Laplacian, in pixels.</font></td> 513 </tr> 514 <tr> 515 <td style="text-align: center;"> 516 <center><a name="chop"></a> <font size="-1">chop</font></center> 517 </td> 518 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 519 &geometry_</font></td> 520 <td><font size="-1">Chop image (remove vertical or horizontal 521 subregion of image)</font></td> 522 </tr> 523 <tr> 524 <td style="text-align: center;"> 525 <center><a name="colorize"></a> <font size="-1">colorize</font></center> 526 </td> 527 <td><font size="-1">const unsigned int opacityRed_, const 528 unsigned int opacityGreen_, const unsigned int opacityBlue_, const 529 Color &penColor_</font></td> 530 <td><font size="-1">Colorize image with pen color, using 531 specified percent opacity for red, green, and blue quantums.</font></td> 532 </tr> 533 <tr> 534 <td style="text-align: center;"> 535 <center><a name="colorMatrix"></a> <font size="-1">colorMatrix</font></center> 536 </td> 537 <td><font size="-1">const size_t order_, const double *color_matrix_</font></td> 538 <td><font size="-1">apply color correction to the image.</font></td> 539 </tr> 540 <tr> 541 <td style="text-align: center;"> 542 <center><a name="comment"></a> <font size="-1">comment</font></center> 543 </td> 544 <td><font size="-1">const std::string &comment_</font></td> 545 <td><font size="-1">Comment image (add comment string to 546 image).  By default, each image is commented with its file name. 547 Use  this  method to  assign a specific comment to the 548 image.  Optionally you can include the image filename, type, 549 width, height, or other  image  attributes by embedding <a 550 href="FormatCharacters.html">special format characters.</a> </font></td> 551 </tr> 552 <tr> 553 <td style="text-align: center;" valign="middle"><font size="-1"><a 554 name="compare"></a> compare<br /> 555 </font></td> 556 <td valign="middle"><font size="-1">const Image &reference_<br /> 557 </font></td> 558 <td valign="top"><font size="-1">Compare current image with 559 another image. Sets <a href="Image.html#meanErrorPerPixel">meanErrorPerPixel</a> 560 , <a href="Image.html#normalizedMaxError">normalizedMaxError</a> , and <a 561 href="Image.html#normalizedMeanError">normalizedMeanError</a> in the current 562 image. False is returned if the images are identical. An ErrorOption 563 exception is thrown if the reference image columns, rows, colorspace, 564 or 565 matte differ from the current image.</font><br /> 566 </td> 567 </tr> 568 <tr> 569 <td style="text-align: center;" rowspan="3"> 570 <center><a name="composite"></a> <font size="-1">composite</font></center> 571 </td> 572 <td><font size="-1">const <a href="Image.html">Image</a> 573 &compositeImage_, ssize_t xOffset_, ssize_t yOffset_, <a 574 href="Enumerations.html#CompositeOperator"> CompositeOperator</a> 575 compose_ = <i>InCompositeOp</i></font></td> 576 <td><font size="-1">Compose an image onto the current image at 577 offset specified by <i>xOffset_</i>, <i>yOffset_ </i>using the 578 composition algorithm specified by <i>compose_</i>. </font></td> 579 </tr> 580 <tr> 581 <td><font size="-1">const <a href="Image.html">Image</a> 582 &compositeImage_, const <a href="Geometry.html">Geometry</a> 583 &offset_, <a href="Enumerations.html#CompositeOperator">CompositeOperator</a> 584 compose_ = <i>InCompositeOp</i></font></td> 585 <td><font size="-1">Compose an image onto the current image at 586 offset specified by <i>offset_</i> using the composition algorithm 587 specified by <i>compose_</i> . </font></td> 588 </tr> 589 <tr> 590 <td><font size="-1">const <a href="Image.html">Image</a> 591 &compositeImage_, <a href="Enumerations.html#GravityType">GravityType</a> 592 gravity_, <a href="Enumerations.html#CompositeOperator">CompositeOperator</a> 593 compose_ = <i>InCompositeOp</i></font></td> 594 <td><font size="-1">Compose an image onto the current image with 595 placement specified by <i>gravity_ </i>using the composition 596 algorithm 597 specified by <i>compose_</i>. </font></td> 598 </tr> 599 <tr> 600 <td style="text-align: center;"> 601 <center><a name="contrast"></a> <font size="-1">contrast</font></center> 602 </td> 603 <td><font size="-1">size_t sharpen_</font></td> 604 <td><font size="-1">Contrast image (enhance intensity differences 605 in image)</font></td> 606 </tr> 607 <tr> 608 <td style="text-align: center;"> 609 <center><a name="convolve"></a> <font size="-1">convolve</font></center> 610 </td> 611 <td><font size="-1">size_t order_, const double *kernel_</font></td> 612 <td><font size="-1">Convolve image.  Applies a user-specfied 613 convolution to the image. The <i>order_</i> parameter represents the 614 number of columns and rows in the filter kernel, and <i>kernel_</i> 615 is a two-dimensional array of doubles representing the convolution 616 kernel to apply.</font></td> 617 </tr> 618 <tr> 619 <td style="text-align: center;"> 620 <center><a name="crop"></a> <font size="-1">crop</font></center> 621 </td> 622 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 623 &geometry_</font></td> 624 <td><font size="-1">Crop image (subregion of original image)</font></td> 625 </tr> 626 <tr> 627 <td style="text-align: center;"> 628 <center><a name="cycleColormap"></a> <font size="-1">cycleColormap</font></center> 629 </td> 630 <td><font size="-1">int amount_</font></td> 631 <td><font size="-1">Cycle image colormap</font></td> 632 </tr> 633 <tr> 634 <td style="text-align: center;"> 635 <center><a name="despeckle"></a> <font size="-1">despeckle</font></center> 636 </td> 637 <td><font size="-1">void</font></td> 638 <td><font size="-1">Despeckle image (reduce speckle noise)</font></td> 639 </tr> 640 <tr> 641 <td style="text-align: center;"> 642 <center><a name="display"></a> <font size="-1">display</font></center> 643 </td> 644 <td><font size="-1">void</font></td> 645 <td><font size="-1">Display image on screen.</font> <br /> 646 <font size="-1"><b><font color="#ff0000">Caution: </font></b> if 647 an image format is is not compatible with the display visual (e.g. 648 JPEG on a colormapped display) then the original image will be 649 altered. Use a copy of the original if this is a problem.</font></td> 650 </tr> 651 <tr> 652 <td> 653 <center><a name="distort"></a> <font size="-1">distort</font></center> 654 </td> 655 <td><font size="-1">const DistortImageMethod method, const size_t number_arguments, const double *arguments, const bool bestfit = false </font></td> 656 <td><font size="-1">Distort image.  Applies a user-specfied 657 distortion to the image.</font></td> 658 </tr> 659 <tr> 660 <td style="text-align: center;" rowspan="2"> 661 <center><a name="draw"></a> <font size="-1">draw</font></center> 662 </td> 663 <td><font size="-1">const <a href="Drawable.html">Drawable</a> 664 &drawable_</font></td> 665 <td><font size="-1">Draw shape or text on image.</font></td> 666 </tr> 667 <tr> 668 <td><font size="-1">const std::list<<a href="Drawable.html">Drawable</a> 669 > &drawable_</font></td> 670 <td><font size="-1">Draw shapes or text on image using a set of 671 Drawable objects contained in an STL list. Use of this method improves 672 drawing performance and allows batching draw objects together in a 673 list for repeated use.</font></td> 674 </tr> 675 <tr> 676 <td style="text-align: center;"> 677 <center><a name="edge"></a> <font size="-1">edge</font></center> 678 </td> 679 <td><font size="-1">size_t radius_ = 0.0</font></td> 680 <td><font size="-1">Edge image (hilight edges in image).  681 The radius is the radius of the pixel neighborhood.. Specify a radius 682 of zero for automatic radius selection.</font></td> 683 </tr> 684 <tr> 685 <td style="text-align: center;"> 686 <center><a name="emboss"></a> <font size="-1">emboss</font></center> 687 </td> 688 <td><font size="-1">const double radius_ = 1, const double sigma_ 689 = 0.5</font></td> 690 <td><font size="-1">Emboss image (hilight edges with 3D effect). 691 The <i> radius_</i> parameter specifies the radius of the Gaussian, in 692 pixels, not counting the center pixel.  The <i>sigma_</i> 693 parameter specifies the standard deviation of the Laplacian, in pixels.</font></td> 694 </tr> 695 <tr> 696 <td style="text-align: center;"> 697 <center><a name="enhance"></a> <font size="-1">enhance</font></center> 698 </td> 699 <td><font size="-1">void</font></td> 700 <td><font size="-1">Enhance image (minimize noise)</font></td> 701 </tr> 702 <tr> 703 <td style="text-align: center;"> 704 <center><a name="equalize"></a> <font size="-1">equalize</font></center> 705 </td> 706 <td><font size="-1">void</font></td> 707 <td><font size="-1">Equalize image (histogram equalization)</font></td> 708 </tr> 709 <tr> 710 <td style="text-align: center;"> 711 <center><a name="erase"></a> <font size="-1">erase</font></center> 712 </td> 713 <td><font size="-1">void</font></td> 714 <td><font size="-1">Set all image pixels to the current 715 background color.</font></td> 716 </tr> 717 <tr> 718 <td style="text-align: center;" rowspan="4"> 719 <center><a name="extent"></a> <font size="-1">extent</font></center></td> 720 <td><font size="-1">const <a href="Geometry.html"> Geometry</a> &geometry_</font></td> 721 <td rowspan="2"><font size="-1">extends the image as defined by the geometry, gravity, and image background color.</font></td> 722 </tr> 723 <tr> 724 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 725 &geometry_, const <a href="Color.html">Color</a> &backgroundColor_</font></td> 726 </tr> 727 <tr> 728 <td><font size="-1">const <a href="Geometry.html"> Geometry</a> &geometry_, const <a href="Enumerations.html#GravityType">GravityType</a> 729 &gravity_</font></td> 730 <td rowspan="2"><font size="-1">extends the image as defined by the geometry, gravity, and image background color.</font></td> 731 </tr> 732 <tr> 733 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 734 &geometry_, const <a href="Color.html">Color</a> &backgroundColor_, 735 const <a href="Enumerations.html#GravityType">GravityType</a> &gravity_</font></td> 736 </tr> 737 <tr> 738 <td style="text-align: center;"> 739 <center><a name="flip"></a> <font size="-1">flip</font></center> 740 </td> 741 <td><font size="-1">void</font></td> 742 <td><font size="-1">Flip image (reflect each scanline in the 743 vertical direction)</font></td> 744 </tr> 745 <tr> 746 <td style="text-align: center;" rowspan="4"> 747 <center><a name="floodFillColor"></a> <font size="-1">floodFill-</font> 748 <br /> 749 <font size="-1">Color</font></center> 750 </td> 751 <td><font size="-1">ssize_t x_, ssize_t y_, const <a 752 href="Color.html"> Color</a> &fillColor_</font></td> 753 <td rowspan="2"><font size="-1">Flood-fill color across pixels 754 that match the color of the target pixel and are neighbors of the 755 target pixel. Uses current fuzz setting when determining color match.</font></td> 756 </tr> 757 <tr> 758 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 759 &point_, const <a href="Color.html">Color</a> &fillColor_</font></td> 760 </tr> 761 <tr> 762 <td><font size="-1">ssize_t x_, ssize_t y_, const <a 763 href="Color.html"> Color</a> &fillColor_, const <a 764 href="Color.html">Color</a> 765 &borderColor_</font></td> 766 <td rowspan="2"><font size="-1">Flood-fill color across pixels 767 starting at target-pixel and stopping at pixels matching specified 768 border color. Uses current fuzz setting when determining color match.</font></td> 769 </tr> 770 <tr> 771 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 772 &point_, const <a href="Color.html">Color</a> &fillColor_, 773 const <a href="Color.html">Color</a> &borderColor_</font></td> 774 </tr> 775 <tr> 776 <td style="text-align: center;"><a name="floodFillOpacity"></a> <font 777 size="-1">floodFillOpacity</font></td> 778 <td><font size="-1">const long x_, const long y_, const unsigned int 779 opacity_, const PaintMethod method_</font></td> 780 <td><font size="-1">Floodfill pixels matching color (within fuzz 781 factor) of target pixel(x,y) with replacement opacity value using 782 method.</font></td> 783 </tr> 784 <tr> 785 <td style="text-align: center;" rowspan="4"> 786 <center><a name="floodFillTexture"></a> <font size="-1">floodFill-</font> 787 <br /> 788 <font size="-1">Texture</font></center> 789 </td> 790 <td><font size="-1">ssize_t x_, ssize_t y_,  const 791 Image &texture_</font></td> 792 <td rowspan="2"><font size="-1">Flood-fill texture across pixels 793 that match the color of the target pixel and are neighbors of the 794 target pixel. Uses current fuzz setting when determining color match.</font></td> 795 </tr> 796 <tr> 797 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 798 &point_, const Image &texture_</font></td> 799 </tr> 800 <tr> 801 <td><font size="-1">ssize_t x_, ssize_t y_, const Image 802 &texture_, const <a href="Color.html">Color</a> &borderColor_</font></td> 803 <td rowspan="2"><font size="-1">Flood-fill texture across pixels 804 starting at target-pixel and stopping at pixels matching specified 805 border color. Uses current fuzz setting when determining color match.</font></td> 806 </tr> 807 <tr> 808 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 809 &point_, const Image &texture_, const <a href="Color.html"> 810 Color</a> 811 &borderColor_</font></td> 812 </tr> 813 <tr> 814 <td style="text-align: center;"> 815 <center><a name="flop"></a> <font size="-1">flop</font></center> 816 </td> 817 <td><font size="-1">void </font></td> 818 <td><font size="-1">Flop image (reflect each scanline in the 819 horizontal direction)</font></td> 820 </tr> 821 <tr> 822 <td style="text-align: center;" rowspan="2"> 823 <center><a name="frame"></a> <font size="-1">frame</font></center> 824 </td> 825 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 826 &geometry_ = "25x25+6+6"</font></td> 827 <td rowspan="2"><font size="-1">Add decorative frame around image</font></td> 828 </tr> 829 <tr> 830 <td><font size="-1">size_t width_, size_t height_, 831 ssize_t x_, ssize_t y_, ssize_t innerBevel_ = 0, ssize_t outerBevel_ = 0</font></td> 832 </tr> 833 <tr> 834 <td> 835 <center><a name="fx"></a> <font size="-1">fx</font></center> 836 </td> 837 <td><font size="-1">const std::string expression, const Magick::ChannelType channel</font></td> 838 <td><font size="-1">Fx image.  Applies a mathematical 839 expression to the image.</font></td> 840 </tr> 841 <tr> 842 <td style="text-align: center;" rowspan="2"> 843 <center><a name="gamma"></a> <font size="-1">gamma</font></center> 844 </td> 845 <td><font size="-1">double gamma_</font></td> 846 <td><font size="-1">Gamma correct image (uniform red, green, and 847 blue correction).</font></td> 848 </tr> 849 <tr> 850 <td><font size="-1">double gammaRed_, double gammaGreen_, double 851 gammaBlue_</font></td> 852 <td><font size="-1">Gamma correct red, green, and blue channels 853 of image.</font></td> 854 </tr> 855 <tr> 856 <td style="text-align: center;"> 857 <center><a name="gaussianBlur"></a> <font size="-1">gaussianBlur</font></center> 858 </td> 859 <td><font size="-1">const double width_, const double sigma_</font></td> 860 <td><font size="-1">Gaussian blur image. The number of neighbor 861 pixels to be included in the convolution mask is specified by 862 'width_'.  For example, a width of one gives a (standard) 3x3 863 convolution mask. The standard deviation of the gaussian bell curve is 864 specified by 'sigma_'.</font></td> 865 </tr> 866 <tr> 867 <td style="vertical-align: middle; text-align: center;"><small><a 868 name="gaussianBlurChannel"></a>gaussianBlurChannel<br /> 869 </small></td> 870 <td style="vertical-align: middle;"><small>const ChannelType 871 channel_, const double radius_ = 0.0, const double sigma_ = 1.0<br /> 872 </small></td> 873 <td style="vertical-align: middle;"><font size="-1">Gaussian blur 874 an image channel. </font><font size="-1">The <span 875 style="font-style: italic;">channel_</span> parameter specifies the 876 channel to blur. </font><font size="-1">The number of neighbor 877 pixels to be included in the convolution mask is specified by 878 'width_'.  For example, a width of one gives a (standard) 3x3 879 convolution mask. The standard deviation of the gaussian bell curve is 880 specified by 'sigma_'.</font></td> 881 </tr> 882 <tr> 883 <td style="text-align: center;" valign="middle"><font size="-1"><a 884 name="haldClut"></a> haldClut<br /> 885 </font></td> 886 <td valign="middle"><font size="-1">const Image &reference_<br /> 887 </font></td> 888 <td valign="top"><font size="-1">apply a Hald color lookup table to the image.</font><br /> 889 </td> 890 </tr> 891 <tr> 892 <td style="text-align: center;"> 893 <center><a name="implode"></a> <font size="-1">implode</font></center> 894 </td> 895 <td><font size="-1">const double factor_</font></td> 896 <td><font size="-1">Implode image (special effect)</font></td> 897 </tr> 898 <tr> 899 <td style="text-align: center;"> 900 <center><a name="inverseFourierTransform"></a> <font size="-1">inverseFourierTransform</font></center> 901 </td> 902 <td><font size="-1">const Image &phaseImage_, const bool magnitude_</font></td> 903 <td><font size="-1">implements the inverse discrete Fourier transform (DFT) of the image either as a magnitude / phase or real / imaginary image pair.</font></td> 904 </tr> 905 <tr> 906 <td style="text-align: center;"> 907 <center><a name="label"></a> <font size="-1">label</font></center> 908 </td> 909 <td><font size="-1">const string &label_</font></td> 910 <td><font size="-1">Assign a label to an image. Use this option 911 to  assign  a  specific label to the image. Optionally 912 you can include the image filename, type, width, height, or scene 913 number in the label by embedding  <a href="FormatCharacters.html"> 914 special format characters.</a> If the first character of string is @, 915 the 916 image label is read from a file titled by the remaining characters in 917 the string. When converting to Postscript, use this  option to 918 specify a header string to print above the image.</font></td> 919 </tr> 920 <tr> 921 <td style="vertical-align: top; text-align: center;"><small><a 922 name="level"></a>level<br /> 923 </small></td> 924 <td style="vertical-align: top;"><small>const double black_point, 925 const double white_point, const double mid_point=1.0<br /> 926 </small></td> 927 <td style="vertical-align: top;"><small>Level image. Adjust the 928 levels of the image by scaling the colors falling between specified 929 white and black points to the full available quantum range. The 930 parameters provided represent the black, mid (gamma), and white 931 points.  The black point specifies the darkest color in the image. 932 Colors darker than the black point are set to zero. Mid point (gamma) 933 specifies a gamma correction to apply to the image. White point 934 specifies the lightest color in the image.  Colors brighter than 935 the white point are set to the maximum quantum value. The black and 936 white point have the valid range 0 to MaxRGB while mid (gamma) has a 937 useful range of 0 to ten.<br /> 938 </small></td> 939 </tr> 940 <tr> 941 <td style="vertical-align: middle; text-align: center;"><small><a 942 name="levelChannel"></a>levelChannel<br /> 943 </small></td> 944 <td style="vertical-align: middle;"><small>const ChannelType 945 channel, const double black_point, const double white_point, const 946 double mid_point=1.0<br /> 947 </small></td> 948 <td style="vertical-align: middle;"><small>Level image channel. 949 Adjust the levels of the image channel by scaling the values falling 950 between specified white and black points to the full available quantum 951 range. The parameters provided represent the black, mid (gamma), and 952 white points. The black point specifies the darkest color in the image. 953 Colors darker than the black point are set to zero. Mid point (gamma) 954 specifies a gamma correction to apply to the image. White point 955 specifies the lightest color in the image. Colors brighter than the 956 white point are set to the maximum quantum value. The black and white 957 point have the valid range 0 to MaxRGB while mid (gamma) has a useful 958 range of 0 to ten.<br /> 959 </small></td> 960 </tr> 961 <tr> 962 <td style="text-align: center;"> 963 <center><a name="magnify"></a> <font size="-1">magnify</font></center> 964 </td> 965 <td><font size="-1">void</font></td> 966 <td><font size="-1">Magnify image by integral size</font></td> 967 </tr> 968 <tr> 969 <td style="text-align: center;"> 970 <center><a name="map"></a> <font size="-1">map</font></center> 971 </td> 972 <td><font size="-1">const Image &mapImage_ , bool dither_ = 973 false</font></td> 974 <td><font size="-1">Remap image colors with closest color from 975 reference image. Set dither_ to <i>true</i> in to apply 976 Floyd/Steinberg 977 error diffusion to the image. By default, color reduction chooses an 978 optimal  set  of colors that best represent the original 979 image. Alternatively, you can  choose  a  980 particular  set  of colors  from  an image file 981 with this option.</font></td> 982 </tr> 983 <tr> 984 <td style="text-align: center;"> 985 <center><a name="matteFloodfill"></a> <font size="-1">matteFloodfill</font></center> 986 </td> 987 <td><font size="-1">const <a href="Color.html">Color</a> 988 &target_, const unsigned int  opacity_, const ssize_t x_, const 989 ssize_t 990 y_, <a href="Enumerations.html#PaintMethod">PaintMethod</a> method_</font></td> 991 <td><font size="-1">Floodfill designated area with a replacement 992 opacity value.</font></td> 993 </tr> 994 <tr> 995 <td style="text-align: center;"><a name="medianFilter"></a> <font 996 size="-1">medianFilter</font></td> 997 <td><font size="-1">const double radius_ = 0.0</font></td> 998 <td><font size="-1">Filter image by replacing each pixel 999 component with the median color in a circular neighborhood</font></td> 1000 </tr> 1001 <tr> 1002 <td style="text-align: center;"> 1003 <center><a name="mergeLayers"></a> <font size="-1">mergeLayers</font></center> 1004 </td> 1005 <td><font size="-1"><a href="Enumerations.html#LayerMethod">LayerMethod</a> 1006 noiseType_</font></td> 1007 <td><font size="-1">handle multiple images forming a set of image layers or animation frames.</font></td> 1008 </tr> 1009 <tr> 1010 <td style="text-align: center;"> 1011 <center><a name="minify"></a> <font size="-1">minify</font></center> 1012 </td> 1013 <td><font size="-1">void</font></td> 1014 <td><font size="-1">Reduce image by integral size</font></td> 1015 </tr> 1016 <tr> 1017 <td style="text-align: center;"><a name="modifyImage"></a> <font 1018 size="-1">modifyImage</font></td> 1019 <td><font size="-1">void</font></td> 1020 <td><font size="-1">Prepare to update image. Ensures that there 1021 is only one reference to the underlying image so that the underlying 1022 image may be safely modified without effecting previous generations of 1023 the image. Copies the underlying image to a new image if necessary.</font></td> 1024 </tr> 1025 <tr> 1026 <td style="text-align: center;"> 1027 <center><a name="modulate"></a> <font size="-1">modulate</font></center> 1028 </td> 1029 <td><font size="-1">double brightness_, double saturation_, 1030 double hue_</font></td> 1031 <td><font size="-1">Modulate percent hue, saturation, and 1032 brightness of an image. Modulation of saturation and brightness is as a 1033 ratio of the current value (1.0 for no change). Modulation of hue is an 1034 absolute rotation of -180 degrees to +180 degrees from the current 1035 position corresponding to an argument range of 0 to 2.0 (1.0 for no 1036 change).</font></td> 1037 </tr> 1038 <tr> 1039 <td style="vertical-align: middle; text-align: center;"><small><a 1040 name="motionBlur"></a>motionBlur<br /> 1041 </small></td> 1042 <td style="vertical-align: middle;"><small>const double radius_, 1043 const double sigma_, const double angle_<br /> 1044 </small></td> 1045 <td style="vertical-align: middle;"><small>Motion blur image with 1046 specified blur factor. The radius_ parameter specifies the radius of 1047 the Gaussian, in pixels, not counting the center pixel.  The 1048 sigma_ parameter specifies the standard deviation of the Laplacian, in 1049 pixels. The angle_ parameter specifies the angle the object appears to 1050 be comming from (zero degrees is from the right).<br /> 1051 </small></td> 1052 </tr> 1053 <tr> 1054 <td style="text-align: center;"> 1055 <center><a name="negate"></a> <font size="-1">negate</font></center> 1056 </td> 1057 <td><font size="-1">bool grayscale_ = false</font></td> 1058 <td><font size="-1">Negate colors in image.  Replace every 1059 pixel with its complementary color (white becomes black, yellow becomes 1060 blue, etc.).  Set grayscale to only negate grayscale values in 1061 image.</font></td> 1062 </tr> 1063 <tr> 1064 <td style="text-align: center;"> 1065 <center><a name="normalize"></a> <font size="-1">normalize</font></center> 1066 </td> 1067 <td><font size="-1">void</font></td> 1068 <td><font size="-1">Normalize image (increase contrast by 1069 normalizing the pixel values to span the full range of color values).</font></td> 1070 </tr> 1071 <tr> 1072 <td style="text-align: center;"> 1073 <center><a name="oilPaint"></a> <font size="-1">oilPaint</font></center> 1074 </td> 1075 <td><font size="-1">size_t radius_ = 3</font></td> 1076 <td><font size="-1">Oilpaint image (image looks like oil painting)</font></td> 1077 </tr> 1078 <tr> 1079 <td style="text-align: center;"> 1080 <center><a name="opacity"></a> <font size="-1">opacity</font></center> 1081 </td> 1082 <td><font size="-1">unsigned int opacity_</font></td> 1083 <td><font size="-1">Set or attenuate the opacity channel in the 1084 image. If the image pixels are opaque then they are set to the 1085 specified 1086 opacity value, otherwise they are blended with the supplied opacity 1087 value.  The value of opacity_ ranges from 0 (completely opaque) to 1088 <i>MaxRGB</i> 1089 . The defines <i>OpaqueOpacity</i> and <i>TransparentOpacity</i> are 1090 available to specify completely opaque or completely transparent, 1091 respectively.</font></td> 1092 </tr> 1093 <tr> 1094 <td style="text-align: center;"> 1095 <center><a name="opaque"></a> <font size="-1">opaque</font></center> 1096 </td> 1097 <td><font size="-1">const <a href="Color.html">Color</a> 1098 &opaqueColor_, const <a href="Color.html">Color</a> &penColor_</font></td> 1099 <td><font size="-1">Change color of pixels matching opaqueColor_ 1100 to specified penColor_.</font></td> 1101 </tr> 1102 <tr> 1103 <td style="text-align: center;" rowspan="2"> 1104 <center><a name="ping"></a> <font size="-1">ping</font></center> 1105 </td> 1106 <td><font size="-1">const std::string &imageSpec_</font></td> 1107 <td rowspan="2"><font size="-1">Ping is similar to read 1108 except only enough of the image is read to determine the image columns, 1109 rows, and filesize.  The <a href="Image.html#columns">columns</a> </font>, 1110 <font size="-1"><a href="Image.html#rows">rows</a> , and <a 1111 href="Image.html#fileSize">fileSize</a> 1112 attributes are valid after invoking ping.  The image data is not 1113 valid after calling ping.</font></td> 1114 </tr> 1115 <tr> 1116 <td><font size="-1">const Blob &blob_</font></td> 1117 </tr> 1118 <tr> 1119 <td style="vertical-align: middle; text-align: center;"><small><a 1120 name="process"></a>process<br /> 1121 </small></td> 1122 <td style="vertical-align: middle;"><small>std::string name_, 1123 const ssize_t argc_, char **argv_<br /> 1124 </small></td> 1125 <td style="vertical-align: middle;"><small>Execute the named 1126 process module, passing any arguments via an argument vector, with 1127 argc_ 1128 specifying the number of arguments in the vector, and argv_ passing the 1129 address of an array of null-terminated C strings which constitute the 1130 argument vector. An exception is thrown if the requested process module 1131 does not exist, fails to load, or fails during execution.</small><br /> 1132 </td> 1133 </tr> 1134 <tr> 1135 <td style="text-align: center;"> 1136 <center><a name="quantize"></a> <font size="-1">quantize</font></center> 1137 </td> 1138 <td><font size="-1">bool measureError_ = false</font></td> 1139 <td><font size="-1">Quantize image (reduce number of colors). Set 1140 measureError_ to true in order to calculate error attributes.</font></td> 1141 </tr> 1142 <tr> 1143 <td style="text-align: center;"> 1144 <center><a name="raise"></a> <font size="-1">raise</font></center> 1145 </td> 1146 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1147 &geometry_ = "6x6+0+0",  bool raisedFlag_ =  false</font></td> 1148 <td><font size="-1">Raise image (lighten or darken the edges of 1149 an image to give a 3-D raised or lowered effect)</font></td> 1150 </tr> 1151 <tr> 1152 <td style="text-align: center;" rowspan="8"> 1153 <center><a name="read"></a> <font size="-1">read</font></center> 1154 </td> 1155 <td><font size="-1">const string &imageSpec_</font></td> 1156 <td><font size="-1">Read image into current object</font></td> 1157 </tr> 1158 <tr> 1159 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1160 &size_, const std::string &imageSpec_</font></td> 1161 <td><font size="-1">Read image of specified size into current 1162 object. This form is useful for images that do not specifiy their size 1163 or to specify a size hint for decoding an image. For example, when 1164 reading a Photo CD, JBIG, or JPEG image, a size request causes the 1165 library to return an image which is the next resolution greater or 1166 equal to the specified size. This may result in memory and time savings.</font></td> 1167 </tr> 1168 <tr> 1169 <td><font size="-1">const <a href="Blob.html">Blob</a> &blob_</font></td> 1170 <td rowspan="5"><font size="-1">Read encoded image of specified 1171 size from an in-memory <a href="Blob.html">BLOB</a> into current 1172 object. Depending on the method arguments, the Blob size, depth, and 1173 format may also be specified. Some image formats require that size be 1174 specified. The default ImageMagick uses for depth depends on its 1175 Quantum size (8 or 16).  If ImageMagick's Quantum size does not 1176 match that of the image, the depth may need to be specified. 1177 ImageMagick can usually automagically detect the image's format. 1178 When 1179 a format can't be automagically detected, the format must be specified.</font></td> 1180 </tr> 1181 <tr> 1182 <td><font size="-1">const <a href="Blob.html">Blob</a> 1183 &blob_, const <a href="Geometry.html">Geometry</a> &size_</font></td> 1184 </tr> 1185 <tr> 1186 <td><font size="-1">const <a href="Blob.html">Blob</a> 1187 &blob_, const <a href="Geometry.html">Geometry</a> &size_, 1188 size_t depth_</font></td> 1189 </tr> 1190 <tr> 1191 <td><font size="-1">const <a href="Blob.html">Blob</a> 1192 &blob_, const <a href="Geometry.html">Geometry</a> &size_, 1193 size_t depth_, const string &magick_ </font></td> 1194 </tr> 1195 <tr> 1196 <td><font size="-1">const <a href="Blob.html">Blob</a> 1197 &blob_, const <a href="Geometry.html">Geometry</a> &size_, 1198 const 1199 string &magick_</font></td> 1200 </tr> 1201 <tr> 1202 <td><font size="-1">const size_t width_, const size_t 1203 height_, std::string map_, const StorageType type_, const void *pixels_</font></td> 1204 <td><font size="-1">Read image based on an array of image pixels. 1205 The pixel data must be in scanline order top-to-bottom. The data can be 1206 character, short int, integer, float, or double. Float and double 1207 require the pixels to be normalized [0..1]. The other types are 1208 [0..MaxRGB].  For example, to create a 640x480 image from 1209 unsigned red-green-blue character data, use</font> 1210 <p><font size="-1">  image.read( 640, 480, "RGB", CharPixel, 1211 pixels );</font> </p> 1212 <p><font size="-1">The parameters are as follows:</font> <br /> 1213  </p> 1214 <table border="0" width="100%"> 1215 <tbody> 1216 <tr> 1217 <td><font size="-1">width_</font></td> 1218 <td><font size="-1">Width in pixels of the image.</font></td> 1219 </tr> 1220 <tr> 1221 <td><font size="-1">height_</font></td> 1222 <td><font size="-1">Height in pixels of the image.</font></td> 1223 </tr> 1224 <tr> 1225 <td><font size="-1">map_</font></td> 1226 <td><font size="-1">This character string can be any 1227 combination or order of R = red, G = green, B = blue, A = alpha, C = 1228 cyan, Y = yellow M = magenta, and K = black. The ordering reflects the 1229 order of the pixels in the supplied pixel array.</font></td> 1230 </tr> 1231 <tr> 1232 <td><font size="-1">type_</font></td> 1233 <td><font size="-1">Pixel storage type (CharPixel, 1234 ShortPixel, IntegerPixel, FloatPixel, or DoublePixel)</font></td> 1235 </tr> 1236 <tr> 1237 <td><font size="-1">pixels_</font></td> 1238 <td><font size="-1">This array of values contain the pixel 1239 components as defined by the map_ and type_ parameters. The length of 1240 the arrays must equal the area specified by the width_ and height_ 1241 values and type_ parameters.</font></td> 1242 </tr> 1243 </tbody> 1244 </table> 1245 </td> 1246 </tr> 1247 <tr> 1248 <td style="text-align: center;"> 1249 <center><a name="reduceNoise"></a> <font size="-1">reduceNoise</font></center> 1250 </td> 1251 <td><font size="-1">const double order_</font></td> 1252 <td><font size="-1">reduce noise in image using a noise peak elimination filter.</font></td> 1253 </tr> 1254 <tr> 1255 <td style="vertical-align: middle; text-align: center;"><small><a 1256 name="randomThreshold"></a>randomThreshold<br /> 1257 </small></td> 1258 <td style="vertical-align: middle;"><small>const Geometry 1259 &thresholds_<br /> 1260 </small></td> 1261 <td style="vertical-align: middle;"><small>Random threshold the 1262 image. Changes the value of individual pixels based on the intensity of 1263 each pixel compared to a random threshold. The result is a 1264 low-contrast, two color image. The thresholds_ argument is a 1265 geometry containing LOWxHIGH thresholds. If the string contains 1266 2x2, 3x3, or 4x4, then an ordered dither of order 2, 3, or 4 will be 1267 performed instead. This is a very fast alternative to 'quantize' based 1268 dithering.<br /> 1269 </small></td> 1270 </tr> 1271 <tr> 1272 <td style="vertical-align: middle; text-align: center;"><small><a 1273 name="randomThresholdChannel"></a>randomThresholdChannel<br /> 1274 </small></td> 1275 <td style="vertical-align: middle;"><small>const Geometry 1276 &thresholds_, const ChannelType channel_<br /> 1277 </small></td> 1278 <td style="vertical-align: middle;"><small>Random threshold an 1279 image channel. Similar to <a href="Image.html#randomThreshold">randomThreshold</a>() 1280 but restricted to the specified channel.<br /> 1281 </small></td> 1282 </tr> 1283 <tr> 1284 <td style="text-align: center;"> 1285 <center><a name="roll"></a> <font size="-1">roll</font></center> 1286 </td> 1287 <td><font size="-1">int columns_, ssize_t rows_</font></td> 1288 <td><font size="-1">Roll image (rolls image vertically and 1289 horizontally) by specified number of columnms and rows)</font></td> 1290 </tr> 1291 <tr> 1292 <td style="text-align: center;"> 1293 <center><a name="rotate"></a> <font size="-1">rotate</font></center> 1294 </td> 1295 <td><font size="-1">double degrees_</font></td> 1296 <td><font size="-1">Rotate image counter-clockwise by specified 1297 number of degrees.</font></td> 1298 </tr> 1299 <tr> 1300 <td style="text-align: center;"> 1301 <center><a name="sample"></a> <font size="-1">sample</font></center> 1302 </td> 1303 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1304 &geometry_ </font></td> 1305 <td><font size="-1">Resize image by using pixel sampling algorithm</font></td> 1306 </tr> 1307 <tr> 1308 <td style="text-align: center;"> 1309 <center><a name="scale"></a> <font size="-1">scale</font></center> 1310 </td> 1311 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1312 &geometry_</font></td> 1313 <td><font size="-1">Resize image by using simple ratio algorithm</font></td> 1314 </tr> 1315 <tr> 1316 <td style="text-align: center;"> 1317 <center><a name="segment"></a> <font size="-1">segment</font></center> 1318 </td> 1319 <td><font size="-1">double clusterThreshold_ = 1.0,</font> <br /> 1320 <font size="-1">double smoothingThreshold_ = 1.5</font></td> 1321 <td><font size="-1">Segment (coalesce similar image components) 1322 by analyzing the histograms of the color components and identifying 1323 units that are homogeneous with the fuzzy c-means technique. Also uses <i>quantizeColorSpace</i> 1324 and <i>verbose</i> image attributes. Specify <i> clusterThreshold_</i> 1325 , 1326 as the number  of  pixels  each cluster  must 1327 exceed 1328 the cluster threshold to be considered valid. <i>SmoothingThreshold_</i> 1329 eliminates noise in the  second derivative of the histogram. As 1330 the 1331 value is  increased, you can  expect  a  smoother 1332 second derivative.  The default is 1.5.</font></td> 1333 </tr> 1334 <tr> 1335 <td style="text-align: center;"> 1336 <center><a name="shade"></a> <font size="-1">shade</font></center> 1337 </td> 1338 <td><font size="-1">double azimuth_ = 30, double elevation_ = 30,</font> 1339 <br /> 1340 <font size="-1">bool colorShading_ = false</font></td> 1341 <td><font size="-1">Shade image using distant light source. 1342 Specify <i> azimuth_</i> and <i>elevation_</i> as the  1343 position  of  the light source. By default, the shading 1344 results as a grayscale image.. Set c<i>olorShading_</i> to <i>true</i> 1345 to 1346 shade the red, green, and blue components of the image.</font></td> 1347 </tr> 1348 <tr> 1349 <td style="text-align: center;"> 1350 <center><a name="shadow"></a> <font size="-1">shadow</font></center> 1351 </td> 1352 <td><font size="-1">const double percent_opacity = 80, const double sigma_ 1353 = 0.5, const ssize_t x_ = 0, const ssize_t y_ = 0</font></td> 1354 <td><font size="-1">simulate an image shadow</font></td> 1355 </tr> 1356 <tr> 1357 <td style="text-align: center;"> 1358 <center><a name="sharpen"></a> <font size="-1">sharpen</font></center> 1359 </td> 1360 <td><font size="-1">const double radius_ = 1, const double sigma_ 1361 = 0.5</font></td> 1362 <td><font size="-1">Sharpen pixels in image.  The <i>radius_</i> 1363 parameter specifies the radius of the Gaussian, in pixels, not counting 1364 the center pixel.  The <i>sigma_</i> parameter specifies the 1365 standard deviation of the Laplacian, in pixels.</font></td> 1366 </tr> 1367 <tr> 1368 <td style="vertical-align: middle; text-align: center;"><small><a 1369 name="sharpenChannel"></a>sharpenChannel<br /> 1370 </small></td> 1371 <td style="vertical-align: middle;"><small>const ChannelType 1372 channel_, const double radius_ = 0.0, const double sigma_ = 1.0<br /> 1373 </small></td> 1374 <td style="vertical-align: middle;"><font size="-1">Sharpen pixel 1375 quantums in an image channel  The <span 1376 style="font-style: italic;">channel_</span> parameter specifies the 1377 channel to sharpen..  The <i>radius_</i> 1378 parameter specifies the radius of the Gaussian, in pixels, not counting 1379 the center pixel.  The <i>sigma_</i> parameter specifies the 1380 standard deviation of the Laplacian, in pixels.</font></td> 1381 </tr> 1382 <tr> 1383 <td style="text-align: center;"> 1384 <center><a name="shave"></a> <font size="-1">shave</font></center> 1385 </td> 1386 <td><font size="-1">const Geometry &geometry_</font></td> 1387 <td><font size="-1">Shave pixels from image edges.</font></td> 1388 </tr> 1389 <tr> 1390 <td style="text-align: center;"> 1391 <center><a name="shear"></a> <font size="-1">shear</font></center> 1392 </td> 1393 <td><font size="-1">double xShearAngle_, double yShearAngle_</font></td> 1394 <td><font size="-1">Shear image (create parallelogram by sliding 1395 image by X or Y axis).  Shearing slides one edge of an image along 1396 the X  or  Y axis,  creating  a 1397 parallelogram.  An X direction shear slides an edge along the X 1398 axis, while  a  Y  direction shear  slides  1399 an edge along the Y axis.  The amount of the shear is controlled 1400 by a shear angle.  For X direction  shears,  x  1401 degrees is measured relative to the Y axis, and similarly, for Y 1402 direction shears  y  degrees is measured relative to the X 1403 axis. Empty triangles left over from shearing the  image  are 1404 filled  with  the  color  defined as <i>borderColor</i>. </font></td> 1405 </tr> 1406 <tr> 1407 <td style="text-align: center;"> 1408 <center><a name="solarize"></a> <font size="-1">solarize</font></center> 1409 </td> 1410 <td><font size="-1">double factor_ = 50.0</font></td> 1411 <td><font size="-1">Solarize image (similar to effect seen when 1412 exposing a photographic film to light during the development process)</font></td> 1413 </tr> 1414 <tr> 1415 <td style="text-align: center;"> 1416 <center><a name="splice"></a> <font size="-1">splice</font></center> 1417 </td> 1418 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1419 &geometry_</font></td> 1420 <td><font size="-1">splice the background color into the image</font></td> 1421 </tr> 1422 <tr> 1423 <td style="text-align: center;"> 1424 <center><a name="spread"></a> <font size="-1">spread</font></center> 1425 </td> 1426 <td><font size="-1">size_t amount_ = 3</font></td> 1427 <td><font size="-1">Spread pixels randomly within image by 1428 specified amount</font></td> 1429 </tr> 1430 <tr> 1431 <td style="text-align: center;"> 1432 <center><a name="stegano"></a> <font size="-1">stegano</font></center> 1433 </td> 1434 <td><font size="-1">const Image &watermark_</font></td> 1435 <td><font size="-1">Add a digital watermark to the image (based 1436 on second image)</font></td> 1437 </tr> 1438 <tr> 1439 <td> 1440 <center><a name="sparseColor"></a> <font size="-1">sparseColor</font></center> 1441 </td> 1442 <td><font size="-1">const ChannelType channel, const SparseColorMethod method, const size_t number_arguments, const double *arguments </font></td> 1443 <td><font size="-1">Sparse color image, given a set of coordinates, interpolates the colors found at those coordinates, across the whole image, using various methods.</font></td> 1444 </tr> 1445 <tr> 1446 <td style="text-align: center;"> 1447 <center><a name="statistics"></a> <font size="-1">statistics</font></center> 1448 </td> 1449 <td><font size="-1">ImageStatistics *statistics</font></td> 1450 <td><font size="-1">Obtain image statistics. Statistics are normalized to the range of 0.0 to 1.0 and are output to the specified ImageStatistics structure. The structure includes members maximum, minimum, mean, standard_deviation, and variance for each of these channels: red, green, blue, and opacity (e.g. statistics->red.maximum).</font></td> 1451 </tr> 1452 <tr> 1453 <td style="text-align: center;"> 1454 <center><a name="stereo"></a> <font size="-1">stereo</font></center> 1455 </td> 1456 <td><font size="-1">const Image &rightImage_</font></td> 1457 <td><font size="-1">Create an image which appears in stereo when 1458 viewed with red-blue glasses (Red image on left, blue on right)</font></td> 1459 </tr> 1460 <tr> 1461 <td style="text-align: center;"> 1462 <center><a name="swirl"></a> <font size="-1">swirl</font></center> 1463 </td> 1464 <td><font size="-1">double degrees_</font></td> 1465 <td><font size="-1">Swirl image (image pixels are rotated by 1466 degrees)</font></td> 1467 </tr> 1468 <tr> 1469 <td style="text-align: center;"> 1470 <center><a name="texture"></a> <font size="-1">texture</font></center> 1471 </td> 1472 <td><font size="-1">const Image &texture_</font></td> 1473 <td><font size="-1">Layer a texture on pixels matching image 1474 background color.</font></td> 1475 </tr> 1476 <tr> 1477 <td style="text-align: center;"> 1478 <center><a name="threshold"></a> <font size="-1">threshold</font></center> 1479 </td> 1480 <td><font size="-1">double threshold_</font></td> 1481 <td><font size="-1">Threshold image</font></td> 1482 </tr> 1483 <tr> 1484 <td style="text-align: center;" rowspan="2"> 1485 <center><a name="transform"></a> <font size="-1">transform</font></center> 1486 </td> 1487 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1488 &imageGeometry_</font></td> 1489 <td rowspan="2"><font size="-1">Transform image based on image 1490 and crop geometries. Crop geometry is optional.</font></td> 1491 </tr> 1492 <tr> 1493 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1494 &imageGeometry_, const <a href="Geometry.html">Geometry</a> 1495 &cropGeometry_ </font></td> 1496 </tr> 1497 <tr> 1498 <td style="text-align: center;"> 1499 <center><a name="transparent"></a> <font size="-1">transparent</font></center> 1500 </td> 1501 <td><font size="-1">const <a href="Color.html">Color</a> 1502 &color_</font></td> 1503 <td><font size="-1">Add matte image to image, setting pixels 1504 matching color to transparent.</font></td> 1505 </tr> 1506 <tr> 1507 <td style="text-align: center;"> 1508 <center><a name="trim"></a> <font size="-1">trim</font></center> 1509 </td> 1510 <td><font size="-1">void</font></td> 1511 <td><font size="-1">Trim edges that are the background color from 1512 the image.</font></td> 1513 </tr> 1514 <tr> 1515 <td style="text-align: center;"> 1516 <center><a name="unsharpmask"></a> <font size="-1">unsharpmask</font></center> 1517 </td> 1518 <td><font size="-1">double radius_, double sigma_, double 1519 amount_, double threshold_</font></td> 1520 <td><font size="-1">Sharpen the image using the unsharp mask 1521 algorithm. The <i>radius</i>_ 1522 parameter specifies the radius of the Gaussian, in pixels, not 1523 counting the center pixel. The <i>sigma</i>_ parameter specifies the 1524 standard deviation of the Gaussian, in pixels. The <i>amount</i>_ 1525 parameter specifies the percentage of the difference between the 1526 original and the blur image that is added back into the original. The <i>threshold</i>_ 1527 parameter specifies the threshold in pixels needed to apply the 1528 diffence amount.</font></td> 1529 </tr> 1530 <tr> 1531 <td style="vertical-align: middle; text-align: center;"><small><a 1532 name="unsharpmaskChannel"></a>unsharpmaskChannel<br /> 1533 </small></td> 1534 <td style="vertical-align: middle;"><small>const ChannelType 1535 channel_, const double radius_, const double sigma_, const double 1536 amount_, const double threshold_<br /> 1537 </small></td> 1538 <td style="vertical-align: middle;"><small>Sharpen an image 1539 channel using the unsharp mask algorithm. The <span 1540 style="font-style: italic;">channel_</span> parameter specifies the 1541 channel to sharpen. </small><font size="-1">The <i>radius</i>_ 1542 parameter specifies the radius of the Gaussian, in pixels, not 1543 counting the center pixel. The <i>sigma</i>_ parameter specifies the 1544 standard deviation of the Gaussian, in pixels. The <i>amount</i>_ 1545 parameter specifies the percentage of the difference between the 1546 original and the blur image that is added back into the original. The <i>threshold</i>_ 1547 parameter specifies the threshold in pixels needed to apply the 1548 diffence amount.</font></td> 1549 </tr> 1550 <tr> 1551 <td style="text-align: center;"> 1552 <center><a name="wave"></a> <font size="-1">wave</font></center> 1553 </td> 1554 <td><font size="-1">double amplitude_ = 25.0, double wavelength_ 1555 = 150.0</font></td> 1556 <td><font size="-1">Alter an image along a sine wave.</font></td> 1557 </tr> 1558 <tr> 1559 <td style="text-align: center;" rowspan="5"> 1560 <center><a name="write"></a> <font size="-1">write</font></center> 1561 </td> 1562 <td><font size="-1">const string &imageSpec_</font></td> 1563 <td><font size="-1">Write image to a file using filename i<i>mageSpec_</i> 1564 .</font> <br /> 1565 <font size="-1"><b><font color="#ff0000">Caution: </font></b> if 1566 an image format is selected which is capable of supporting fewer 1567 colors than the original image or quantization has been requested, the 1568 original image will be quantized to fewer colors. Use a copy of the 1569 original if this is a problem.</font></td> 1570 </tr> 1571 <tr> 1572 <td><font size="-1"><a href="Blob.html">Blob</a> *blob_</font></td> 1573 <td rowspan="3"><font size="-1">Write image to a in-memory <a 1574 href="Blob.html"> BLOB</a> stored in <i>blob_</i>. The <i>magick</i>_ 1575 parameter specifies the image format to write (defaults to <a 1576 href="Image.html#magick">magick</a> ). The depth_ parameter species the image 1577 depth (defaults to <a href="Image.html#depth"> depth</a> ).</font> <br /> 1578 <font size="-1"><b><font color="#ff0000">Caution: </font></b> if 1579 an image format is selected which is capable of supporting fewer 1580 colors than the original image or quantization has been requested, the 1581 original image will be quantized to fewer colors. Use a copy of the 1582 original if this is a problem.</font></td> 1583 </tr> 1584 <tr> 1585 <td><font size="-1"><a href="Blob.html">Blob</a> *blob_, 1586 std::string &magick_</font></td> 1587 </tr> 1588 <tr> 1589 <td><font size="-1"><a href="Blob.html">Blob</a> *blob_, 1590 std::string &magick_, size_t depth_</font></td> 1591 </tr> 1592 <tr> 1593 <td><font size="-1">const ssize_t x_, const ssize_t y_, const size_t 1594 columns_, const size_t rows_, const std::string &map_, 1595 const StorageType type_, void *pixels_</font></td> 1596 <td><font size="-1">Write pixel data into a buffer you supply. 1597 The data is saved either as char, short int, integer, float or double 1598 format in the order specified by the type_ parameter. For example, we 1599 want to extract scanline 1 of a 640x480 image as character data in 1600 red-green-blue order:</font> 1601 <p><font size="-1">  image.write(0,0,640,1,"RGB",0,pixels);</font> 1602 </p> 1603 <p><font size="-1">The parameters are as follows:</font> <br /> 1604  </p> 1605 <table border="0" width="100%"> 1606 <tbody> 1607 <tr> 1608 <td><font size="-1">x_</font></td> 1609 <td><font size="-1">Horizontal ordinate of left-most 1610 coordinate of region to extract.</font></td> 1611 </tr> 1612 <tr> 1613 <td><font size="-1">y_</font></td> 1614 <td><font size="-1">Vertical ordinate of top-most 1615 coordinate of region to extract.</font></td> 1616 </tr> 1617 <tr> 1618 <td><font size="-1">columns_</font></td> 1619 <td><font size="-1">Width in pixels of the region to 1620 extract.</font></td> 1621 </tr> 1622 <tr> 1623 <td><font size="-1">rows_</font></td> 1624 <td><font size="-1">Height in pixels of the region to 1625 extract.</font></td> 1626 </tr> 1627 <tr> 1628 <td><font size="-1">map_</font></td> 1629 <td><font size="-1">This character string can be any 1630 combination or order of R = red, G = green, B = blue, A = alpha, C = 1631 cyan, Y = yellow, M = magenta, and K = black. The ordering reflects 1632 the order of the pixels in the supplied pixel array.</font></td> 1633 </tr> 1634 <tr> 1635 <td><font size="-1">type_</font></td> 1636 <td><font size="-1">Pixel storage type (CharPixel, 1637 ShortPixel, IntegerPixel, FloatPixel, or DoublePixel)</font></td> 1638 </tr> 1639 <tr> 1640 <td><font size="-1">pixels_</font></td> 1641 <td><font size="-1">This array of values contain the pixel 1642 components as defined by the map_ and type_ parameters. The length of 1643 the arrays must equal the area specified by the width_ and height_ 1644 values and type_ parameters.</font></td> 1645 </tr> 1646 </tbody> 1647 </table> 1648 </td> 1649 </tr> 1650 <tr> 1651 <td style="text-align: center;"> 1652 <center><a name="resize"></a> <font size="-1">resize</font></center> 1653 </td> 1654 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 1655 &geometry_</font></td> 1656 <td><font size="-1">Resize image to specified size.</font></td> 1657 </tr> 1658 </tbody> 1659 </table> 1660 <center> 1661 <h3> <a name="Image Attributes"></a> Image Attributes</h3> 1662 </center> 1663 Image attributes are set and obtained via methods in Image. Except for 1664 methods which accept pointer arguments (e.g. c<tt>hromaBluePrimary)</tt> 1665 all methods return attributes by value. 1666 <p>Image attributes are easily used. For example, to set the resolution 1667 of the TIFF file "file.tiff" to 150 dots-per-inch (DPI) in both the 1668 horizontal and vertical directions, you can use the following example 1669 code: </p> 1670 <pre class="code"> 1671 string filename("file.tiff"); 1672 Image image; 1673 image.read(filename); 1674 image.resolutionUnits(PixelsPerInchResolution); 1675 image.density(Geometry(150,150)); // could also use image.density("150x150") 1676 image.write(filename) 1677 </pre> 1678 The supported image attributes and the method arguments required to 1679 obtain them are shown in the following table: <br /> 1680   1681 <table border="1"> 1682 <caption>Image Attributes</caption> <tbody> 1683 <tr> 1684 <td> 1685 <center><b>Function</b></center> 1686 </td> 1687 <td> 1688 <center><b>Type</b></center> 1689 </td> 1690 <td> 1691 <center><b>Get Signature</b></center> 1692 </td> 1693 <td> 1694 <center><b>Set Signature</b></center> 1695 </td> 1696 <td> 1697 <center><b>Description</b></center> 1698 </td> 1699 </tr> 1700 <tr> 1701 <td> 1702 <center><a name="adjoin"></a> <font size="-1">adjoin</font></center> 1703 </td> 1704 <td><font size="-1">bool</font></td> 1705 <td><font size="-1">void</font></td> 1706 <td><font size="-1">bool flag_</font></td> 1707 <td><font size="-1">Join images into a single multi-image file.</font></td> 1708 </tr> 1709 <tr> 1710 <td> 1711 <center><a name="antiAlias"></a> <font size="-1">antiAlias</font></center> 1712 </td> 1713 <td><font size="-1">bool</font></td> 1714 <td><font size="-1">void</font></td> 1715 <td><font size="-1">bool flag_</font></td> 1716 <td><font size="-1">Control antialiasing of rendered Postscript 1717 and Postscript or TrueType fonts. Enabled by default.</font></td> 1718 </tr> 1719 <tr> 1720 <td> 1721 <center><a name="animationDelay"></a> <font size="-1">animation-</font> 1722 <br /> 1723 <font size="-1">Delay</font></center> 1724 </td> 1725 <td><font size="-1">size_t (0 to 65535)</font></td> 1726 <td><font size="-1">void</font></td> 1727 <td><font size="-1">size_t delay_</font></td> 1728 <td><font size="-1">Time in 1/100ths of a second (0 to 65535) 1729 which must expire before displaying the next image in an animated 1730 sequence. This option is useful for regulating the animation of a 1731 sequence  of GIF images within Netscape.</font></td> 1732 </tr> 1733 <tr> 1734 <td> 1735 <center><a name="animationIterations"></a> <font size="-1">animation-</font> 1736 <br /> 1737 <font size="-1">Iterations</font></center> 1738 </td> 1739 <td><font size="-1">size_t</font></td> 1740 <td><font size="-1">void</font></td> 1741 <td><font size="-1">size_t iterations_</font></td> 1742 <td><font size="-1">Number of iterations to loop an animation 1743 (e.g. Netscape loop extension) for.</font></td> 1744 </tr> 1745 <tr> 1746 <td style="vertical-align: middle; text-align: center;"><small><a 1747 name="attribute"></a>attribute<br /> 1748 </small></td> 1749 <td style="vertical-align: middle;"><small>string<br /> 1750 </small></td> 1751 <td style="vertical-align: top;" valign="top"><small>const 1752 std::string name_<br /> 1753 </small></td> 1754 <td style="vertical-align: top;" valign="top"><small>const 1755 std::string name_, const std::string value_</small></td> 1756 <td style="vertical-align: middle;"><small>An arbitrary named 1757 image attribute. Any number of named attributes may be attached to the 1758 image. For example, the image comment is a named image attribute with 1759 the name "comment". EXIF tags are attached to the image as named 1760 attributes. Use the syntax "EXIF:<tag>" to request an EXIF tag 1761 similar to "EXIF:DateTime".</small><br /> 1762 </td> 1763 </tr> 1764 <tr> 1765 <td> 1766 <center><a name="backgroundColor"></a> <font size="-1">background-</font> 1767 <br /> 1768 <font size="-1">Color</font></center> 1769 </td> 1770 <td><font size="-1"><a href="Color.html">Color</a> </font></td> 1771 <td><font size="-1">void</font></td> 1772 <td><font size="-1">const <a href="Color.html">Color</a> 1773 &color_</font></td> 1774 <td><font size="-1">Image background color</font></td> 1775 </tr> 1776 <tr> 1777 <td> 1778 <center><a name="backgroundTexture"></a> <font size="-1">background-</font> 1779 <br /> 1780 <font size="-1">Texture</font></center> 1781 </td> 1782 <td><font size="-1">string</font></td> 1783 <td><font size="-1">void</font></td> 1784 <td><font size="-1">const string &texture_</font></td> 1785 <td><font size="-1">Image file name to use as the background 1786 texture. Does not modify image pixels.</font></td> 1787 </tr> 1788 <tr> 1789 <td> 1790 <center><a name="baseColumns"></a> <font size="-1">baseColumns</font></center> 1791 </td> 1792 <td><font size="-1">size_t</font></td> 1793 <td><font size="-1">void</font></td> 1794 <td bgcolor="#666666"><font size="-1"> </font></td> 1795 <td><font size="-1">Base image width (before transformations)</font></td> 1796 </tr> 1797 <tr> 1798 <td> 1799 <center><a name="baseFilename"></a> <font size="-1">baseFilename</font></center> 1800 </td> 1801 <td><font size="-1">string</font></td> 1802 <td><font size="-1">void</font></td> 1803 <td bgcolor="#666666"><font size="-1"> </font></td> 1804 <td><font size="-1">Base image filename (before transformations)</font></td> 1805 </tr> 1806 <tr> 1807 <td> 1808 <center><a name="baseRows"></a> <font size="-1">baseRows</font></center> 1809 </td> 1810 <td><font size="-1">size_t</font></td> 1811 <td><font size="-1">void</font></td> 1812 <td bgcolor="#666666"><font size="-1"> </font></td> 1813 <td><font size="-1">Base image height (before transformations)</font></td> 1814 </tr> 1815 <tr> 1816 <td> 1817 <center><a name="borderColor"></a> <font size="-1">borderColor</font></center> 1818 </td> 1819 <td><font size="-1"><a href="Color.html">Color</a> </font></td> 1820 <td><font size="-1">void</font></td> 1821 <td><font size="-1"> const <a href="Color.html">Color</a> 1822 &color_</font></td> 1823 <td><font size="-1">Image border color</font></td> 1824 </tr> 1825 <tr> 1826 <td><a name="boundingBox"></a> <font size="-1">boundingBox</font></td> 1827 <td><font size="-1">Geometry</font></td> 1828 <td><font size="-1">void</font></td> 1829 <td bgcolor="#666666"><font size="-1"> </font></td> 1830 <td><font size="-1">Return smallest bounding box enclosing 1831 non-border pixels. The current fuzz value is used when discriminating 1832 between pixels. This is the crop bounding box used by 1833 crop(Geometry(0,0)).</font></td> 1834 </tr> 1835 <tr> 1836 <td> 1837 <center><a name="boxColor"></a> <font size="-1">boxColor</font></center> 1838 </td> 1839 <td><font size="-1"><a href="Color.html">Color</a> </font></td> 1840 <td><font size="-1">void</font></td> 1841 <td><font size="-1">const <a href="Color.html">Color</a> 1842 &boxColor_</font></td> 1843 <td><font size="-1">Base color that annotation text is rendered 1844 on.</font></td> 1845 </tr> 1846 <tr> 1847 <td><a name="cacheThreshold"></a> <font size="-1">cacheThreshold</font></td> 1848 <td><font size="-1">size_t</font></td> 1849 <td bgcolor="#666666"><font size="-1"> </font></td> 1850 <td><font size="-1">const size_t</font></td> 1851 <td><font size="-1">Pixel cache threshold in bytes. Once this 1852 threshold is exceeded, all subsequent pixels cache operations are 1853 to/from disk. This is a static method and the attribute it sets is 1854 shared by all Image objects.</font></td> 1855 </tr> 1856 <tr> 1857 <td style="vertical-align: middle;" valign="middle"><small><a 1858 name="channelDepth"></a>channelDepth<br /> 1859 </small></td> 1860 <td style="vertical-align: middle;" valign="middle"><small>size_t 1861 <br /> 1862 </small></td> 1863 <td style="vertical-align: middle;" valign="middle"><small>const 1864 ChannelType channel_<br /> 1865 </small></td> 1866 <td style="vertical-align: middle;"><small>const ChannelType 1867 channel_, const size_t depth_<br /> 1868 </small></td> 1869 <td style="vertical-align: middle;"><small>Channel modulus depth. 1870 The channel modulus depth represents the minimum number of bits 1871 required 1872 to support the channel without loss. Setting the channel's modulus 1873 depth 1874 modifies the channel (i.e. discards resolution) if the requested 1875 modulus 1876 depth is less than the current modulus depth, otherwise the channel is 1877 not altered. There is no attribute associated with the modulus depth so 1878 the current modulus depth is obtained by inspecting the pixels. As a 1879 result, the depth returned may be less than the most recently set 1880 channel depth. Subsequent image processing may result in increasing the 1881 channel depth.<br /> 1882 </small></td> 1883 </tr> 1884 <tr> 1885 <td> 1886 <center><a name="chromaBluePrimary"></a> <font size="-1">chroma-</font> 1887 <br /> 1888 <font size="-1">BluePrimary</font></center> 1889 </td> 1890 <td><font size="-1">double x & y</font></td> 1891 <td><font size="-1">double *x_, double *y_</font></td> 1892 <td><font size="-1">double x_, double y_</font></td> 1893 <td><font size="-1">Chromaticity blue primary point (e.g. x=0.15, 1894 y=0.06)</font></td> 1895 </tr> 1896 <tr> 1897 <td> 1898 <center><a name="chromaGreenPrimary"></a> <font size="-1">chroma-</font> 1899 <br /> 1900 <font size="-1">GreenPrimary</font></center> 1901 </td> 1902 <td><font size="-1">double x & y</font></td> 1903 <td><font size="-1">double *x_, double *y_</font></td> 1904 <td><font size="-1">double x_, double y_</font></td> 1905 <td><font size="-1">Chromaticity green primary point (e.g. x=0.3, 1906 y=0.6)</font></td> 1907 </tr> 1908 <tr> 1909 <td> 1910 <center><a name="chromaRedPrimary"></a> <font size="-1">chroma-</font> 1911 <br /> 1912 <font size="-1">RedPrimary</font></center> 1913 </td> 1914 <td><font size="-1">double x & y</font></td> 1915 <td><font size="-1">double *x_, double *y_</font></td> 1916 <td><font size="-1">double x_, double y_</font></td> 1917 <td><font size="-1">Chromaticity red primary point (e.g. x=0.64, 1918 y=0.33)</font></td> 1919 </tr> 1920 <tr> 1921 <td> 1922 <center><a name="chromaWhitePoint"></a> <font size="-1">chroma-</font> 1923 <br /> 1924 <font size="-1">WhitePoint</font></center> 1925 </td> 1926 <td><font size="-1">double x & y</font></td> 1927 <td><font size="-1">double*x_, double *y_</font></td> 1928 <td><font size="-1">double x_, double y_</font></td> 1929 <td><font size="-1">Chromaticity white point (e.g. x=0.3127, 1930 y=0.329)</font></td> 1931 </tr> 1932 <tr> 1933 <td> 1934 <center><a name="classType"></a> <font size="-1">classType</font></center> 1935 </td> 1936 <td><font size="-1"><a href="Enumerations.html#ClassType">ClassType</a> 1937 </font></td> 1938 <td><font size="-1">void</font></td> 1939 <td><font size="-1"> <a href="Enumerations.html#ClassType">ClassType</a> 1940 class_</font></td> 1941 <td><font size="-1">Image storage class.  Note that 1942 conversion from a DirectClass image to a PseudoClass image may result 1943 in a loss of color due to the limited size of the palette (256 or 1944 65535 colors).</font></td> 1945 </tr> 1946 <tr> 1947 <td> 1948 <center><a name="clipMask"></a> <font size="-1">clipMask</font></center> 1949 </td> 1950 <td><font size="-1">Image</font></td> 1951 <td><font size="-1">void</font></td> 1952 <td><font size="-1">const Image &clipMask_</font></td> 1953 <td><font size="-1">Associate a clip mask image with the current 1954 image. The clip mask image must have the same dimensions as the current 1955 image or an exception is thrown. Clipping occurs wherever pixels are 1956 transparent in the clip mask image. Clipping Pass an invalid image to 1957 unset an existing clip mask.</font></td> 1958 </tr> 1959 <tr> 1960 <td> 1961 <center><a name="colorFuzz"></a> <font size="-1">colorFuzz</font></center> 1962 </td> 1963 <td><font size="-1">double</font></td> 1964 <td><font size="-1">void</font></td> 1965 <td><font size="-1">double fuzz_</font></td> 1966 <td><font size="-1">Colors within this distance are considered 1967 equal. A number of algorithms search for a target  color. By 1968 default the color must be exact. Use this option to match colors that 1969 are close to the target color in RGB space.</font></td> 1970 </tr> 1971 <tr> 1972 <td> 1973 <center><a name="colorMap"></a> <font size="-1">colorMap</font></center> 1974 </td> 1975 <td><font size="-1"><a href="Color.html">Color</a> </font></td> 1976 <td><font size="-1">size_t index_</font></td> 1977 <td><font size="-1">size_t index_, const <a 1978 href="Color.html"> Color</a> &color_</font></td> 1979 <td><font size="-1">Color at colormap index.</font></td> 1980 </tr> 1981 <tr> 1982 <td valign="middle"> 1983 <div style="text-align:center"><a name="colorMapSize"></a> <font size="-1">colorMapSize<br /> 1984 </font></div> 1985 </td> 1986 <td valign="middle"><font size="-1">size_t<br /> 1987 </font></td> 1988 <td valign="middle"><font size="-1">void<br /> 1989 </font></td> 1990 <td valign="middle"><font size="-1">size_t entries_<br /> 1991 </font></td> 1992 <td valign="middle"><font size="-1">Number of entries in the 1993 colormap. Setting the colormap size may extend or truncate the 1994 colormap. 1995 The maximum number of supported entries is specified by the <i>MaxColormapSize</i>constant, 1996 and is dependent on the value of QuantumDepth when ImageMagick is 1997 compiled. An exception is thrown if more entries are requested than may 1998 be supported. Care should be taken when truncating the colormap to 1999 ensure that the image colormap indexes reference valid colormap entries.</font><br /> 2000 </td> 2001 </tr> 2002 <tr> 2003 <td> 2004 <center><a name="colorSpace"></a> <font size="-1">colorSpace</font></center> 2005 </td> 2006 <td><font size="-1"><a href="Enumerations.html#ColorspaceType">ColorspaceType</a> 2007 colorSpace_</font></td> 2008 <td><font size="-1">void</font></td> 2009 <td><font size="-1"><a href="Enumerations.html#ColorspaceType">ColorspaceType</a> 2010 colorSpace_</font></td> 2011 <td><font size="-1">The colorspace (e.g. CMYK) used to represent 2012 the image pixel colors. Image pixels are always stored as RGB(A) except 2013 for the case of CMY(K).</font></td> 2014 </tr> 2015 <tr> 2016 <td> 2017 <center><a name="columns"></a> <font size="-1">columns</font></center> 2018 </td> 2019 <td><font size="-1">size_t</font></td> 2020 <td><font size="-1">void</font></td> 2021 <td bgcolor="#666666"><font size="-1"> </font></td> 2022 <td><font size="-1">Image width</font></td> 2023 </tr> 2024 <tr> 2025 <td> 2026 <center><a name="comment"></a> <font size="-1">comment</font></center> 2027 </td> 2028 <td><font size="-1">string</font></td> 2029 <td><font size="-1">void</font></td> 2030 <td bgcolor="#666666"><font size="-1"> </font></td> 2031 <td><font size="-1">Image comment</font></td> 2032 </tr> 2033 <tr> 2034 <td> 2035 <center><a name="compose"></a> <font size="-1">compose</font></center> 2036 </td> 2037 <td><font size="-1"><a href="Enumerations.html#CompositeOperator">CompositeOperator</a> 2038 </font></td> 2039 <td><small><font size="-1"><small>void</small></font></small></td> 2040 <td><small><font size="-1"><small><a 2041 href="Enumerations.html#CompositeOperator">CompositeOperator</a> 2042 compose_</small></font></small></td> 2043 <td><font size="-1">Composition operator to be used when 2044 composition is implicitly used (such as for image flattening).</font></td> 2045 </tr> 2046 <tr> 2047 <td> 2048 <center><a name="compressType"></a> <font size="-1">compress-</font> 2049 <br /> 2050 <font size="-1">Type</font></center> 2051 </td> 2052 <td><font size="-1"><a href="Enumerations.html#CompressionType">CompressionType</a> 2053 </font></td> 2054 <td><small><font size="-1"><small>void</small></font></small></td> 2055 <td><small><font size="-1"><small><a 2056 href="Enumerations.html#CompressionType">CompressionType</a> 2057 compressType_</small></font></small></td> 2058 <td><font size="-1">Image compresion type. The default is the 2059 compression type of the specified image file.</font></td> 2060 </tr> 2061 <tr> 2062 <td> 2063 <center><a name="debug"></a> <font size="-1">debug</font></center> 2064 </td> 2065 <td><font size="-1">bool</font></td> 2066 <td><small><font size="-1"><small>void</small></font></small></td> 2067 <td><small><font size="-1"><small>bool flag_</small></font></small></td> 2068 <td><font size="-1">Enable printing of internal debug messages 2069 from ImageMagick as it executes.</font></td> 2070 </tr> 2071 <tr> 2072 <td style="text-align: center; vertical-align: middle;"><small><a 2073 name="defineValue"></a>defineValue<br /> 2074 </small></td> 2075 <td style="vertical-align: middle; text-align: left;"><small>string<br /> 2076 </small></td> 2077 <td style="vertical-align: middle;"><small>const std::string 2078 &magick_, const std::string &key_<br /> 2079 </small></td> 2080 <td style="vertical-align: middle;"><small>const std::string 2081 &magick_, const std::string &key_,  const std::string 2082 &value_<br /> 2083 </small></td> 2084 <td style="vertical-align: top;"><small>Set or obtain a 2085 definition string to applied when encoding or decoding the specified 2086 format. The meanings of the definitions are format specific. The format 2087 is designated by the <span style="font-style: italic;">magick_</span> 2088 argument, the format-specific key is designated by <span 2089 style="font-style: italic;">key_</span>, and the associated value is 2090 specified by <span style="font-style: italic;">value_</span>. See the 2091 defineSet() method if the key must be removed entirely.</small><br /> 2092 </td> 2093 </tr> 2094 <tr> 2095 <td style="text-align: center; vertical-align: middle;"><small><a 2096 name="defineSet"></a>defineSet<br /> 2097 </small></td> 2098 <td style="vertical-align: middle; text-align: left;"><small>bool<br /> 2099 </small></td> 2100 <td style="vertical-align: middle;"><small>const std::string 2101 &magick_, const std::string &key_<br /> 2102 </small></td> 2103 <td style="vertical-align: middle;"><small>const std::string 2104 &magick_, const std::string &key_, bool flag_<br /> 2105 </small></td> 2106 <td style="vertical-align: middle;"><small>Set or obtain a 2107 definition flag to applied when encoding or decoding the specified 2108 format.</small><small>. Similar to the defineValue() method except that 2109 passing the <span style="font-style: italic;">flag_</span> value 2110 'true' 2111 creates a value-less define with that format and key. Passing the <span 2112 style="font-style: italic;">f</span><span style="font-style: italic;">lag_</span> 2113 value 'false' removes any existing matching definition. The method 2114 returns 'true' if a matching key exists, and 'false' if no matching key 2115 exists.<br /> 2116 </small></td> 2117 </tr> 2118 <tr> 2119 <td> 2120 <center><a name="density"></a> <font size="-1">density</font></center> 2121 </td> 2122 <td><font size="-1"><a href="Geometry.html">Geometry</a>   2123 (default 72x72)</font></td> 2124 <td><font size="-1">void</font></td> 2125 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 2126 &density_</font></td> 2127 <td><font size="-1">Vertical and horizontal resolution in pixels 2128 of the image. This option specifies an image density when decoding a 2129 Postscript or Portable Document page. Often used with <i>psPageSize</i>.</font></td> 2130 </tr> 2131 <tr> 2132 <td> 2133 <center><a name="depth"></a> <font size="-1">depth</font></center> 2134 </td> 2135 <td><font size="-1"> size_t (8-32)</font></td> 2136 <td><font size="-1">void</font></td> 2137 <td><font size="-1">size_t depth_</font></td> 2138 <td><font size="-1">Image depth. Used to specify the bit depth 2139 when reading or writing  raw images or when the output format 2140 supports multiple depths. Defaults to the quantum depth that 2141 ImageMagick is compiled with.</font></td> 2142 </tr> 2143 <tr> 2144 <td> 2145 <center><a name="endian"></a> <font size="-1">endian</font></center> 2146 </td> 2147 <td><font size="-1"><a href="Enumerations.html#EndianType">EndianType</a> 2148 </font></td> 2149 <td><font size="-1">void</font></td> 2150 <td><font size="-1"><a href="Enumerations.html#EndianType">EndianType</a> 2151 endian_</font></td> 2152 <td><font size="-1">Specify (or obtain) endian option for formats 2153 which support it.</font></td> 2154 </tr> 2155 <tr> 2156 <td> 2157 <center><a name="directory"></a> <font size="-1">directory</font></center> 2158 </td> 2159 <td><font size="-1">string</font></td> 2160 <td><font size="-1">void</font></td> 2161 <td><font size="-1"> </font></td> 2162 <td><font size="-1">Tile names from within an image montage</font></td> 2163 </tr> 2164 <tr> 2165 <td> 2166 <center><a name="file"></a> <font size="-1">file</font></center> 2167 </td> 2168 <td><font size="-1">FILE *</font></td> 2169 <td><font size="-1">FILE *</font></td> 2170 <td><font size="-1">FILE *file_</font></td> 2171 <td><font size="-1">Image file descriptor.</font></td> 2172 </tr> 2173 <tr> 2174 <td> 2175 <center><a name="fileName"></a> <font size="-1">fileName</font></center> 2176 </td> 2177 <td><font size="-1">string</font></td> 2178 <td><font size="-1">void</font></td> 2179 <td><font size="-1">const string &fileName_</font></td> 2180 <td><font size="-1">Image file name.</font></td> 2181 </tr> 2182 <tr> 2183 <td> 2184 <center><a name="fileSize"></a> <font size="-1">fileSize</font></center> 2185 </td> 2186 <td><font size="-1">off_t</font></td> 2187 <td><font size="-1">void</font></td> 2188 <td bgcolor="#666666"><font size="-1"> </font></td> 2189 <td><font size="-1">Number of bytes of the image on disk</font></td> 2190 </tr> 2191 <tr> 2192 <td> 2193 <center><a name="fillColor"></a> <font size="-1">fillColor</font></center> 2194 </td> 2195 <td><font size="-1">Color</font></td> 2196 <td><font size="-1">void</font></td> 2197 <td><font size="-1">const Color &fillColor_</font></td> 2198 <td><font size="-1">Color to use when filling drawn objects</font></td> 2199 </tr> 2200 <tr> 2201 <td> 2202 <center><a name="fillPattern"></a> <font size="-1">fillPattern</font></center> 2203 </td> 2204 <td><font size="-1">Image</font></td> 2205 <td><font size="-1">void</font></td> 2206 <td><font size="-1">const Image &fillPattern_</font></td> 2207 <td><font size="-1">Pattern image to use when filling drawn 2208 objects.</font></td> 2209 </tr> 2210 <tr> 2211 <td> 2212 <center><a name="fillRule"></a> <font size="-1">fillRule</font></center> 2213 </td> 2214 <td><font size="-1"><a href="Enumerations.html#FillRule">FillRule</a> 2215 </font></td> 2216 <td><font size="-1">void</font></td> 2217 <td><font size="-1">const Magick::FillRule &fillRule_</font></td> 2218 <td><font size="-1">Rule to use when filling drawn objects.</font></td> 2219 </tr> 2220 <tr> 2221 <td> 2222 <center><a name="filterType"></a> <font size="-1">filterType</font></center> 2223 </td> 2224 <td><font size="-1"><a href="Enumerations.html#FilterTypes">FilterTypes</a> 2225 </font></td> 2226 <td><font size="-1">void</font></td> 2227 <td><font size="-1"><a href="Enumerations.html#FilterTypes">FilterTypes</a> 2228 filterType_</font></td> 2229 <td><font size="-1">Filter to use when resizing image. The 2230 reduction filter employed has a sigificant effect on the time required 2231 to resize an image and the resulting quality. The default filter is <i>Lanczos</i> 2232 which has been shown to produce high quality results when reducing most 2233 images.</font></td> 2234 </tr> 2235 <tr> 2236 <td> 2237 <center><a name="font"></a> <font size="-1">font</font></center> 2238 </td> 2239 <td><font size="-1">string</font></td> 2240 <td><font size="-1">void</font></td> 2241 <td><font size="-1">const string &font_</font></td> 2242 <td><font size="-1">Text rendering font. If the font is a fully 2243 qualified X server font name, the font is obtained from an X  2244 server. To use a TrueType font, precede the TrueType filename with an 2245 @. Otherwise, specify  a  Postscript font name (e.g. 2246 "helvetica").</font></td> 2247 </tr> 2248 <tr> 2249 <td> 2250 <center><a name="fontPointsize"></a> <font size="-1">fontPointsize</font></center> 2251 </td> 2252 <td><font size="-1">size_t</font></td> 2253 <td><font size="-1">void</font></td> 2254 <td><font size="-1">size_t pointSize_</font></td> 2255 <td><font size="-1">Text rendering font point size</font></td> 2256 </tr> 2257 <tr> 2258 <td> 2259 <center><a name="fontTypeMetrics"></a> <font size="-1">fontTypeMetrics</font></center> 2260 </td> 2261 <td><font size="-1"><a href="TypeMetric.html">TypeMetric</a> </font></td> 2262 <td><font size="-1">const std::string &text_, <a 2263 href="TypeMetric.html"> TypeMetric</a> *metrics</font></td> 2264 <td bgcolor="#666666"><font size="-1"> </font></td> 2265 <td><font size="-1">Update metrics with font type metrics using 2266 specified <i>text</i>, and current <a href="Image.html#font">font</a> and <a 2267 href="Image.html#fontPointsize">fontPointSize</a> settings.</font></td> 2268 </tr> 2269 <tr> 2270 <td> 2271 <center><a name="format"></a> <font size="-1">format</font></center> 2272 </td> 2273 <td><font size="-1">string</font></td> 2274 <td><font size="-1">void</font></td> 2275 <td bgcolor="#666666"><font size="-1"> </font></td> 2276 <td><font size="-1">Long form image format description.</font></td> 2277 </tr> 2278 <tr> 2279 <td> 2280 <center><a name="gamma"></a> <font size="-1">gamma</font></center> 2281 </td> 2282 <td><font size="-1">double (typical range 0.8 to 2.3)</font></td> 2283 <td><font size="-1">void</font></td> 2284 <td bgcolor="#666666"><font size="-1"> </font></td> 2285 <td><font size="-1">Gamma level of the image. The same color 2286 image displayed on two different  workstations  may  2287 look  different due to differences in the display monitor.  2288 Use gamma correction  to  adjust  for this  2289 color  difference.</font></td> 2290 </tr> 2291 <tr> 2292 <td> 2293 <center><a name="geometry"></a> <font size="-1">geometry</font></center> 2294 </td> 2295 <td><font size="-1"><a href="Geometry.html">Geometry</a> </font></td> 2296 <td><font size="-1">void</font></td> 2297 <td bgcolor="#666666"><font size="-1"> </font></td> 2298 <td><font size="-1">Preferred size of the image when encoding.</font></td> 2299 </tr> 2300 <tr> 2301 <td> 2302 <center><a name="gifDisposeMethod"></a> <font size="-1">gifDispose-</font> 2303 <br /> 2304 <font size="-1">Method</font></center> 2305 </td> 2306 <td><font size="-1">size_t</font> <br /> 2307 <font size="-1">{ 0 = Disposal not specified,</font> <br /> 2308 <font size="-1">1 = Do not dispose of graphic,</font> <br /> 2309 <font size="-1">3 = Overwrite graphic with background color,</font> 2310 <br /> 2311 <font size="-1">4 = Overwrite graphic with previous graphic. }</font></td> 2312 <td><font size="-1">void</font></td> 2313 <td><font size="-1">size_t disposeMethod_</font></td> 2314 <td><font size="-1">GIF disposal method. This option is used to 2315 control how successive frames are rendered (how the preceding frame is 2316 disposed of) when creating a GIF animation.</font></td> 2317 </tr> 2318 <tr> 2319 <td> 2320 <center><a name="iccColorProfile"></a> <font size="-1">iccColorProfile</font></center> 2321 </td> 2322 <td><font size="-1"><a href="Blob.html">Blob</a> </font></td> 2323 <td><font size="-1">void</font></td> 2324 <td><font size="-1">const <a href="Blob.html">Blob</a> 2325 &colorProfile_</font></td> 2326 <td><font size="-1">ICC color profile. Supplied via a <a 2327 href="Blob.html"> Blob</a> since Magick++/ and ImageMagick do not 2328 currently support formating this data structure directly.  2329 Specifications are available from the <a href="http://www.color.org/"> 2330 International Color Consortium</a> for the format of ICC color profiles.</font></td> 2331 </tr> 2332 <tr> 2333 <td> 2334 <center><a name="interlaceType"></a> <font size="-1">interlace-</font> 2335 <br /> 2336 <font size="-1">Type</font></center> 2337 </td> 2338 <td><font size="-1"><a href="Enumerations.html#InterlaceType">InterlaceType</a> 2339 </font></td> 2340 <td><font size="-1">void</font></td> 2341 <td><font size="-1"><a href="Enumerations.html#InterlaceType">InterlaceType</a> 2342 interlace_</font></td> 2343 <td><font size="-1">The type of interlacing scheme (default <i>NoInterlace</i> 2344 ). This option is used to specify the type of  interlacing 2345 scheme  for  raw  image formats such as RGB or YUV. <i>NoInterlace</i> 2346 means do not  interlace, <i>LineInterlace</i> uses scanline 2347 interlacing, and <i>PlaneInterlace</i> uses plane interlacing. <i> 2348 PartitionInterlace</i> is like <i>PlaneInterlace</i> except the  2349 different planes  are saved  to individual files (e.g.  2350 image.R, image.G, and image.B). Use <i>LineInterlace</i> or <i> 2351 PlaneInterlace</i> to create an interlaced GIF or progressive JPEG 2352 image.</font></td> 2353 </tr> 2354 <tr> 2355 <td> 2356 <center><a name="iptcProfile"></a> <font size="-1">iptcProfile</font></center> 2357 </td> 2358 <td><font size="-1"><a href="Blob.html">Blob</a> </font></td> 2359 <td><font size="-1">void</font></td> 2360 <td><font size="-1">const <a href="Blob.html">Blob</a> & 2361 iptcProfile_</font></td> 2362 <td><font size="-1">IPTC profile. Supplied via a <a 2363 href="Blob.html"> Blob</a> since Magick++ and ImageMagick do not 2364 currently  support formating this data structure directly. 2365 Specifications are available from the <a href="http://www.iptc.org/"> 2366 International Press Telecommunications Council</a> for IPTC profiles.</font></td> 2367 </tr> 2368 <tr> 2369 <td> 2370 <center><a name="label"></a> <font size="-1">label</font></center> 2371 </td> 2372 <td><font size="-1">string</font></td> 2373 <td><font size="-1">void</font></td> 2374 <td><font size="-1">const string &label_</font></td> 2375 <td><font size="-1">Image label</font></td> 2376 </tr> 2377 <tr> 2378 <td> 2379 <center><a name="magick"></a> <font size="-1">magick</font></center> 2380 </td> 2381 <td><font size="-1">string</font></td> 2382 <td><font size="-1">void</font></td> 2383 <td><font size="-1"> const string &magick_</font></td> 2384 <td><font size="-1">Get image format (e.g. "GIF")</font></td> 2385 </tr> 2386 <tr> 2387 <td> 2388 <center><a name="matte"></a> <font size="-1">matte</font></center> 2389 </td> 2390 <td><font size="-1">bool</font></td> 2391 <td><font size="-1">void</font></td> 2392 <td><font size="-1">bool matteFlag_</font></td> 2393 <td><font size="-1">True if the image has transparency. If set 2394 True, store matte channel if  the image has one otherwise create 2395 an opaque one.</font></td> 2396 </tr> 2397 <tr> 2398 <td> 2399 <center><a name="matteColor"></a> <font size="-1">matteColor</font></center> 2400 </td> 2401 <td><font size="-1"><a href="Color.html">Color</a> </font></td> 2402 <td><font size="-1">void</font></td> 2403 <td><font size="-1">const <a href="Color.html">Color</a> 2404 &matteColor_</font></td> 2405 <td><font size="-1">Image matte (frame) color</font></td> 2406 </tr> 2407 <tr> 2408 <td> 2409 <center><a name="meanErrorPerPixel"></a> <font size="-1">meanError-</font> 2410 <br /> 2411 <font size="-1">PerPixel</font></center> 2412 </td> 2413 <td><font size="-1">double</font></td> 2414 <td><font size="-1">void</font></td> 2415 <td bgcolor="#666666"><font size="-1"> </font></td> 2416 <td><font size="-1">The mean error per pixel computed when an 2417 image is color reduced. This parameter is only valid if verbose is set 2418 to true and the image has just been quantized.</font></td> 2419 </tr> 2420 <tr> 2421 <td style="text-align: center; vertical-align: middle;"><font 2422 size="-1"><a name="modulusDepth"></a>modulusDepth<br /> 2423 </font></td> 2424 <td style="text-align: left; vertical-align: middle;"><small>size_t 2425 <br /> 2426 </small></td> 2427 <td style="text-align: left; vertical-align: middle;"><small><font 2428 size="-1"><small>void<br /> 2429 </small></font></small></td> 2430 <td style="text-align: left; vertical-align: middle;"><small>size_t 2431 depth_<br /> 2432 </small></td> 2433 <td style="text-align: left; vertical-align: middle;"><small>Image 2434 modulus depth (minimum number of bits required to support 2435 red/green/blue components without loss of accuracy). The pixel modulus 2436 depth may be decreased by supplying a value which is less than the 2437 current value, updating the pixels (reducing accuracy) to the new 2438 depth. 2439 The pixel modulus depth can not be increased over the current value 2440 using this method.<br /> 2441 </small></td> 2442 </tr> 2443 <tr> 2444 <td> 2445 <center><a name="monochrome"></a> <font size="-1">monochrome</font></center> 2446 </td> 2447 <td><font size="-1">bool</font></td> 2448 <td><font size="-1">void</font></td> 2449 <td><font size="-1">bool flag_</font></td> 2450 <td><font size="-1">Transform the image to black and white</font></td> 2451 </tr> 2452 <tr> 2453 <td> 2454 <center><a name="montageGeometry"></a> <font size="-1">montage-</font> 2455 <br /> 2456 <font size="-1">Geometry</font></center> 2457 </td> 2458 <td><font size="-1"><a href="Geometry.html">Geometry</a> </font></td> 2459 <td><font size="-1">void</font></td> 2460 <td bgcolor="#666666"><font size="-1"> </font></td> 2461 <td><font size="-1">Tile size and offset within an image montage. 2462 Only valid for montage images.</font></td> 2463 </tr> 2464 <tr> 2465 <td> 2466 <center><a name="normalizedMaxError"></a> <font size="-1">normalized-</font> 2467 <br /> 2468 <font size="-1">MaxError</font></center> 2469 </td> 2470 <td><font size="-1">double</font></td> 2471 <td><font size="-1">void</font></td> 2472 <td bgcolor="#666666"><font size="-1"> </font></td> 2473 <td><font size="-1">The normalized max error per pixel computed 2474 when an image is color reduced. This parameter is only valid if verbose 2475 is set to true and the image has just been quantized.</font></td> 2476 </tr> 2477 <tr> 2478 <td> 2479 <center><a name="normalizedMeanError"></a> <font size="-1">normalized-</font> 2480 <br /> 2481 <font size="-1">MeanError</font></center> 2482 </td> 2483 <td><font size="-1">double</font></td> 2484 <td><font size="-1">void</font></td> 2485 <td bgcolor="#666666"><font size="-1"> </font></td> 2486 <td><font size="-1">The normalized mean error per pixel computed 2487 when an image is color reduced. This parameter is only valid if verbose 2488 is set to true and the image has just been quantized.</font></td> 2489 </tr> 2490 <tr> 2491 <td style="text-align: center; vertical-align: middle;"><small><a 2492 name="orientation"></a>orientation<br /> 2493 </small></td> 2494 <td style="vertical-align: middle;"><small><a 2495 href="Enumerations.html#OrientationType">OrientationType</a></small></td> 2496 <td style="vertical-align: top;"><small>void</small><br /> 2497 </td> 2498 <td style="vertical-align: middle;"><small><a 2499 href="Enumerations.html#OrientationType">OrientationType</a> 2500 orientation_</small></td> 2501 <td style="vertical-align: top;"><small>Image orientation. 2502  Supported by some file formats such as DPX and TIFF. Useful for 2503 turning the right way up.<br /> 2504 </small></td> 2505 </tr> 2506 <tr> 2507 <td> 2508 <center><a name="packets"></a> <font size="-1">packets</font></center> 2509 </td> 2510 <td><font size="-1">size_t</font></td> 2511 <td><font size="-1">void</font></td> 2512 <td bgcolor="#666666"><font size="-1"> </font></td> 2513 <td><font size="-1">The number of runlength-encoded packets in</font> 2514 <br /> 2515 <font size="-1">the image</font></td> 2516 </tr> 2517 <tr> 2518 <td> 2519 <center><a name="packetSize"></a> <font size="-1">packetSize</font></center> 2520 </td> 2521 <td><font size="-1">size_t</font></td> 2522 <td><font size="-1">void</font></td> 2523 <td bgcolor="#666666"><font size="-1"> </font></td> 2524 <td><font size="-1">The number of bytes in each pixel packet</font></td> 2525 </tr> 2526 <tr> 2527 <td> 2528 <center><a name="page"></a> <font size="-1">page</font></center> 2529 </td> 2530 <td><font size="-1"><a href="Geometry.html#PostscriptPageSize">Geometry</a> 2531 </font></td> 2532 <td><font size="-1">void</font></td> 2533 <td><font size="-1">const <a 2534 href="Geometry.html#PostscriptPageSize"> Geometry</a> &pageSize_</font></td> 2535 <td><font size="-1">Preferred size and location of an image 2536 canvas.</font> 2537 <p><font size="-1">Use this option to specify the dimensions 2538 and position of the Postscript page in dots per inch or a TEXT page in 2539 pixels. This option is typically used in concert with <i><a 2540 href="Image.html#density"> density</a> </i>.</font> </p> 2541 <p><font size="-1">Page may also be used to position a GIF 2542 image (such as for a scene in an animation)</font></p> 2543 </td> 2544 </tr> 2545 <tr> 2546 <td> 2547 <center><a name="pixelColor"></a> <font size="-1">pixelColor</font></center> 2548 </td> 2549 <td><font size="-1"><a href="Color.html">Color</a> </font></td> 2550 <td><font size="-1">ssize_t x_, ssize_t y_</font></td> 2551 <td><font size="-1">ssize_t x_, ssize_t y_, const <a 2552 href="Color.html"> Color</a> &color_</font></td> 2553 <td><font size="-1">Get/set pixel color at location x & y.</font></td> 2554 </tr> 2555 <tr> 2556 <td valign="top"> 2557 <div style="text-align:center"><a name="profile"></a> <small>profile</small><br /> 2558 </div> 2559 </td> 2560 <td valign="top"><a href="Blob.html"><small> Blob</small><small><br /> 2561 </small></a> </td> 2562 <td valign="top"><small>const std::string name_</small><small><br /> 2563 </small></td> 2564 <td valign="top"><small>const std::string name_, const Blob 2565 &colorProfile_</small><small><br /> 2566 </small></td> 2567 <td valign="top"><small>Get/set/remove </small><small> a named 2568 profile</small><small>. Valid names include </small><small>"*", 2569 "8BIM", "ICM", "IPTC", or a user/format-defined profile name. </small><br /> 2570 </td> 2571 </tr> 2572 <tr> 2573 <td> 2574 <center><a name="quality"></a> <font size="-1">quality</font></center> 2575 </td> 2576 <td><font size="-1">size_t (0 to 100)</font></td> 2577 <td><font size="-1">void</font></td> 2578 <td><font size="-1">size_t quality_</font></td> 2579 <td><font size="-1">JPEG/MIFF/PNG compression level (default 75).</font></td> 2580 </tr> 2581 <tr> 2582 <td> 2583 <center><a name="quantizeColors"></a> <font size="-1">quantize-</font> 2584 <br /> 2585 <font size="-1">Colors</font></center> 2586 </td> 2587 <td><font size="-1">size_t</font></td> 2588 <td><font size="-1">void</font></td> 2589 <td><font size="-1">size_t colors_</font></td> 2590 <td><font size="-1">Preferred number of colors in the image. The 2591 actual number of colors in the image may be less than your request, but 2592 never more. Images with less unique colors than specified with this 2593 option will have any duplicate or unused colors removed.</font></td> 2594 </tr> 2595 <tr> 2596 <td> 2597 <center><a name="quantizeColorSpace"></a> <font size="-1">quantize-</font> 2598 <br /> 2599 <font size="-1">ColorSpace</font></center> 2600 </td> 2601 <td><font size="-1"><a href="Enumerations.html#ColorspaceType">ColorspaceType</a> 2602 </font></td> 2603 <td><font size="-1">void</font></td> 2604 <td><font size="-1"><a href="Enumerations.html#ColorspaceType">ColorspaceType</a> 2605 colorSpace_</font></td> 2606 <td><font size="-1">Colorspace to quantize colors in (default 2607 RGB). Empirical evidence suggests that distances in color spaces such 2608 as YUV or YIQ correspond to perceptual color differences more closely 2609 than do distances in RGB space. These color spaces may give better 2610 results when color reducing an image.</font></td> 2611 </tr> 2612 <tr> 2613 <td> 2614 <center><a name="quantizeDither"></a> <font size="-1">quantize-</font> 2615 <br /> 2616 <font size="-1">Dither</font></center> 2617 </td> 2618 <td><font size="-1">bool</font></td> 2619 <td><font size="-1">void</font></td> 2620 <td><font size="-1">bool flag_</font></td> 2621 <td><font size="-1">Apply Floyd/Steinberg error diffusion to the 2622 image. The basic strategy of dithering is to  trade  2623 intensity 2624 resolution  for  spatial  resolution  by  2625 averaging the intensities  of  several  2626 neighboring  pixels. Images which  suffer  from  2627 severe  contouring  when  reducing colors can be 2628 improved with this option. The quantizeColors or monochrome option must 2629 be set for this option to take effect.</font></td> 2630 </tr> 2631 <tr> 2632 <td> 2633 <center><a name="quantizeTreeDepth"></a> <font size="-1">quantize-</font> 2634 <br /> 2635 <font size="-1">TreeDepth</font></center> 2636 </td> 2637 <td><font size="-1">size_t </font></td> 2638 <td><font size="-1">void</font></td> 2639 <td><font size="-1">size_t treeDepth_</font></td> 2640 <td><font size="-1">Depth of the quantization color 2641 classification tree. Values of 0 or 1 allow selection of the optimal 2642 tree depth for the color reduction algorithm. Values between 2 and 8 2643 may be used to manually adjust the tree depth.</font></td> 2644 </tr> 2645 <tr> 2646 <td> 2647 <center><a name="renderingIntent"></a> <font size="-1">rendering-</font> 2648 <br /> 2649 <font size="-1">Intent</font></center> 2650 </td> 2651 <td><font size="-1"><a href="Enumerations.html#RenderingIntent">RenderingIntent</a> 2652 </font></td> 2653 <td><font size="-1">void</font></td> 2654 <td><font size="-1"><a href="Enumerations.html#RenderingIntent">RenderingIntent</a> 2655 render_</font></td> 2656 <td><font size="-1">The type of rendering intent</font></td> 2657 </tr> 2658 <tr> 2659 <td> 2660 <center><a name="resolutionUnits"></a> <font size="-1">resolution-</font> 2661 <br /> 2662 <font size="-1">Units</font></center> 2663 </td> 2664 <td><font size="-1"><a href="Enumerations.html#ResolutionType">ResolutionType</a> 2665 </font></td> 2666 <td><font size="-1">void</font></td> 2667 <td><font size="-1"><a href="Enumerations.html#ResolutionType">ResolutionType</a> 2668 units_</font></td> 2669 <td><font size="-1">Units of image resolution</font></td> 2670 </tr> 2671 <tr> 2672 <td> 2673 <center><a name="rows"></a> <font size="-1">rows</font></center> 2674 </td> 2675 <td><font size="-1">size_t</font></td> 2676 <td><font size="-1">void</font></td> 2677 <td bgcolor="#666666"><font size="-1"> </font></td> 2678 <td><font size="-1">The number of pixel rows in the image</font></td> 2679 </tr> 2680 <tr> 2681 <td> 2682 <center><a name="scene"></a> <font size="-1">scene</font></center> 2683 </td> 2684 <td><font size="-1">size_t</font></td> 2685 <td><font size="-1">void</font></td> 2686 <td><font size="-1">size_t scene_</font></td> 2687 <td><font size="-1">Image scene number</font></td> 2688 </tr> 2689 <tr> 2690 <td> 2691 <center><a name="signature"></a> <font size="-1">signature</font></center> 2692 </td> 2693 <td><font size="-1">string</font></td> 2694 <td><font size="-1">bool force_ = false</font></td> 2695 <td bgcolor="#666666"><font size="-1"> </font></td> 2696 <td><font size="-1">Image MD5 signature. Set force_ to 'true' to 2697 force re-computation of signature.</font></td> 2698 </tr> 2699 <tr> 2700 <td> 2701 <center><a name="size"></a> <font size="-1">size</font></center> 2702 </td> 2703 <td><font size="-1"><a href="Geometry.html">Geometry</a> </font></td> 2704 <td><font size="-1">void</font></td> 2705 <td><font size="-1">const <a href="Geometry.html">Geometry</a> 2706 &geometry_</font></td> 2707 <td><font size="-1">Width and height of a raw image (an image 2708 which does not support width and height information).  Size may 2709 also be used to affect the image size read from a multi-resolution 2710 format (e.g. Photo CD, JBIG, or JPEG.</font></td> 2711 </tr> 2712 <tr> 2713 <td style="text-align: center;"> 2714 <center><a name="strip"></a> <font size="-1">strip</font></center> 2715 </td> 2716 <td><font size="-1">void</font></td> 2717 <td><font size="-1">strips an image of all profiles and comments.</font></td> 2718 </tr> 2719 <tr> 2720 <td> 2721 <center><a name="strokeAntiAlias"></a> <font size="-1">strokeAntiAlias</font></center> 2722 </td> 2723 <td><font size="-1">bool</font></td> 2724 <td><font size="-1">void</font></td> 2725 <td><font size="-1">bool flag_</font></td> 2726 <td><font size="-1">Enable or disable anti-aliasing when drawing 2727 object outlines.</font></td> 2728 </tr> 2729 <tr> 2730 <td> 2731 <center><a name="strokeColor"></a> <font size="-1">strokeColor</font></center> 2732 </td> 2733 <td><font size="-1">Color</font></td> 2734 <td><font size="-1">void</font></td> 2735 <td><font size="-1">const Color &strokeColor_</font></td> 2736 <td><font size="-1">Color to use when drawing object outlines</font></td> 2737 </tr> 2738 <tr> 2739 <td> 2740 <center><a name="strokeDashOffset"></a> <font size="-1">strokeDashOffset</font></center> 2741 </td> 2742 <td><font size="-1">size_t</font></td> 2743 <td><font size="-1">void</font></td> 2744 <td><font size="-1">double strokeDashOffset_</font></td> 2745 <td><font size="-1">While drawing using a dash pattern, specify 2746 distance into the dash pattern to start the dash (default 0).</font></td> 2747 </tr> 2748 <tr> 2749 <td> 2750 <center><a name="strokeDashArray"></a> <font size="-1">strokeDashArray</font></center> 2751 </td> 2752 <td><font size="-1">const double*</font></td> 2753 <td><font size="-1">void</font></td> 2754 <td><font size="-1">const double* strokeDashArray_</font></td> 2755 <td><font size="-1">Specify the pattern of dashes and gaps used 2756 to stroke paths. The strokeDashArray represents a zero-terminated 2757 array of numbers that specify the lengths (in pixels) of alternating 2758 dashes and gaps in user units. If an odd number of values is provided, 2759 then the list of values is repeated to yield an even number of 2760 values.  A typical strokeDashArray_ array might contain the 2761 members 5 3 2 0, where the zero value indicates the end of the pattern 2762 array.</font></td> 2763 </tr> 2764 <tr> 2765 <td> 2766 <center><a name="strokeLineCap"></a> <font size="-1">strokeLineCap</font></center> 2767 </td> 2768 <td><font size="-1">LineCap</font></td> 2769 <td><font size="-1">void</font></td> 2770 <td><font size="-1">LineCap lineCap_</font></td> 2771 <td><font size="-1">Specify the shape to be used at the corners 2772 of paths (or other vector shapes) when they are stroked. Values of 2773 LineJoin are UndefinedJoin, MiterJoin, RoundJoin, and BevelJoin.</font></td> 2774 </tr> 2775 <tr> 2776 <td> 2777 <center><a name="strokeLineJoin"></a> <font size="-1">strokeLineJoin</font></center> 2778 </td> 2779 <td><font size="-1">LineJoin</font></td> 2780 <td><font size="-1">void</font></td> 2781 <td><font size="-1">LineJoin lineJoin_</font></td> 2782 <td><font size="-1">Specify the shape to be used at the corners 2783 of paths (or other vector shapes) when they are stroked. Values of 2784 LineJoin are UndefinedJoin, MiterJoin, RoundJoin, and BevelJoin.</font></td> 2785 </tr> 2786 <tr> 2787 <td> 2788 <center><a name="strokeMiterLimit"></a> <font size="-1">strokeMiterLimit</font></center> 2789 </td> 2790 <td><font size="-1">size_t</font></td> 2791 <td><font size="-1">void</font></td> 2792 <td><font size="-1">size_t miterLimit_</font></td> 2793 <td><font size="-1">Specify miter limit. When two line segments 2794 meet at a sharp angle and miter joins have been specified for 2795 'lineJoin', it is possible for the miter to extend far beyond the 2796 thickness of the line stroking the path. The miterLimit' imposes a 2797 limit on the ratio of the miter length to the 'lineWidth'. The default 2798 value of this parameter is 4.</font></td> 2799 </tr> 2800 <tr> 2801 <td> 2802 <center><a name="strokeWidth"></a> <font size="-1">strokeWidth</font></center> 2803 </td> 2804 <td><font size="-1">double</font></td> 2805 <td><font size="-1">void</font></td> 2806 <td><font size="-1">double strokeWidth_</font></td> 2807 <td><font size="-1">Stroke width for use when drawing vector 2808 objects (default one)</font></td> 2809 </tr> 2810 <tr> 2811 <td> 2812 <center><a name="strokePattern"></a> <font size="-1">strokePattern</font></center> 2813 </td> 2814 <td><font size="-1">Image</font></td> 2815 <td><font size="-1">void</font></td> 2816 <td><font size="-1">const Image &strokePattern_</font></td> 2817 <td><font size="-1">Pattern image to use while drawing object 2818 stroke (outlines).</font></td> 2819 </tr> 2820 <tr> 2821 <td> 2822 <center><a name="subImage"></a> <font size="-1">subImage</font></center> 2823 </td> 2824 <td><font size="-1">size_t</font></td> 2825 <td><font size="-1">void</font></td> 2826 <td><font size="-1">size_t subImage_</font></td> 2827 <td><font size="-1">Subimage of an image sequence</font></td> 2828 </tr> 2829 <tr> 2830 <td> 2831 <center><a name="subRange"></a> <font size="-1">subRange</font></center> 2832 </td> 2833 <td><font size="-1">size_t</font></td> 2834 <td><font size="-1">void</font></td> 2835 <td><font size="-1">size_t subRange_</font></td> 2836 <td><font size="-1">Number of images relative to the base image</font></td> 2837 </tr> 2838 <tr> 2839 <td valign="middle"> 2840 <div style="text-align:center"><a name="textEncoding"></a> <small>textEncoding</small><br /> 2841 </div> 2842 </td> 2843 <td valign="middle"><small>string</small><small><br /> 2844 </small></td> 2845 <td valign="middle"><small>void</small><small><br /> 2846 </small></td> 2847 <td valign="middle"><small>const std::string &encoding_</small><small><br /> 2848 </small></td> 2849 <td valign="top"><small>Specify the code set to use for text 2850 annotations. The only character encoding which may be specified at 2851 this time is "UTF-8" for representing </small><small><a 2852 href="http://www.unicode.org/"> Unicode </a> </small><small>as a 2853 sequence of bytes. Specify an empty string to use the default ASCII 2854 encoding. Successful text annotation using Unicode may require fonts 2855 designed to support Unicode.</small><br /> 2856 </td> 2857 </tr> 2858 <tr> 2859 <td> 2860 <center><a name="tileName"></a> <font size="-1">tileName</font></center> 2861 </td> 2862 <td><font size="-1">string</font></td> 2863 <td><font size="-1">void</font></td> 2864 <td><font size="-1">const string &tileName_</font></td> 2865 <td><font size="-1">Tile name</font></td> 2866 </tr> 2867 <tr> 2868 <td> 2869 <center><a name="totalColors"></a> <font size="-1">totalColors</font></center> 2870 </td> 2871 <td><font size="-1">size_t</font></td> 2872 <td><font size="-1">void</font></td> 2873 <td bgcolor="#666666"><font size="-1"> </font></td> 2874 <td><font size="-1">Number of colors in the image</font></td> 2875 </tr> 2876 <tr> 2877 <td> 2878 <center><a name="type"></a> <font size="-1">type</font></center> 2879 </td> 2880 <td><font size="-1"><a href="Enumerations.html#ImageType">ImageType</a> 2881 </font></td> 2882 <td><font size="-1">void</font></td> 2883 <td bgcolor="#ffffff"><font size="-1"><a 2884 href="Enumerations.html#ImageType"> ImageType</a> </font></td> 2885 <td><font size="-1">Image type.</font></td> 2886 </tr> 2887 <tr> 2888 <td> 2889 <center><a name="verbose"></a> <font size="-1">verbose</font></center> 2890 </td> 2891 <td><font size="-1">bool</font></td> 2892 <td><font size="-1">void</font></td> 2893 <td><font size="-1">bool verboseFlag_</font></td> 2894 <td><font size="-1">Print detailed information about the image</font></td> 2895 </tr> 2896 <tr> 2897 <td> 2898 <center><a name="view"></a> <font size="-1">view</font></center> 2899 </td> 2900 <td><font size="-1">string</font></td> 2901 <td><font size="-1">void</font></td> 2902 <td><font size="-1">const string &view_</font></td> 2903 <td><font size="-1">FlashPix viewing parameters.</font></td> 2904 </tr> 2905 <tr> 2906 <td> 2907 <center><a name="virtualPixelMethod"></a> <font size="-1">virtualPixelMethod</font></center> 2908 </td> 2909 <td><font size="-1"><a href="Enumerations.html#VirtualPixelMethod">VirtualPixelMethod</a> 2910 </font></td> 2911 <td><small><font size="-1"><small>void</small></font></small></td> 2912 <td><small><font size="-1"><small><a 2913 href="Enumerations.html#VirtualPixelMethod">VirtualPixelMethod</a> 2914 virtualPixelMethod_</small></font></small></td> 2915 <td><font size="-1">Image virtual pixel method.</font></td> 2916 </tr> 2917 <tr> 2918 <td> 2919 <center><a name="x11Display"></a> <font size="-1">x11Display</font></center> 2920 </td> 2921 <td><font size="-1">string (e.g. "hostname:0.0")</font></td> 2922 <td><font size="-1">void</font></td> 2923 <td><font size="-1">const string &display_</font></td> 2924 <td><font size="-1">X11 display to display to, obtain fonts from, 2925 or to capture image from</font></td> 2926 </tr> 2927 <tr> 2928 <td> 2929 <center><a name="xResolution"></a> <font size="-1">xResolution</font></center> 2930 </td> 2931 <td><font size="-1">double</font></td> 2932 <td><font size="-1">void</font></td> 2933 <td bgcolor="#666666"><font size="-1"> </font></td> 2934 <td><font size="-1">x resolution of the image</font></td> 2935 </tr> 2936 <tr> 2937 <td> 2938 <center><a name="yResolution"></a> <font size="-1">yResolution</font></center> 2939 </td> 2940 <td><font size="-1">double</font></td> 2941 <td><font size="-1">void</font></td> 2942 <td bgcolor="#666666"><font size="-1"> </font></td> 2943 <td><font size="-1">y resolution of the image</font></td> 2944 </tr> 2945 </tbody> 2946 </table> 2947 <center> 2948 <h3> <a name="Raw Image Pixel Access"></a> Low-Level Image Pixel Access</h3> 2949 </center> 2950 Image pixels (of type <i><a href="PixelPacket.html">PixelPacket</a> </i>) 2951 may be accessed directly via the <i>Image Pixel Cache</i> .  The 2952 image pixel cache is a rectangular window into the actual image pixels 2953 (which may be in memory, memory-mapped from a disk file, or entirely on 2954 disk). Two interfaces exist to access the <i>Image Pixel Cache.</i> 2955 The 2956 interface described here (part of the <i>Image</i> class) supports 2957 only 2958 one view at a time. See the <i><a href="Pixels.html">Pixels</a> </i> 2959 class for a more abstract interface which supports simultaneous pixel 2960 views (up to the number of rows). As an analogy, the interface 2961 described 2962 here relates to the <i><a href="Pixels.html">Pixels</a> </i> class as 2963 stdio's gets() relates to fgets(). The <i><a href="Pixels.html"> Pixels</a> 2964 </i>class provides the more general form of the interface. 2965 <p>Obtain existing image pixels via <i>getPixels()</i>. Create a new 2966 pixel region using <i>setPixels().</i></p> 2967 <p>In order to ensure that only the current generation of the image is 2968 modified, the Image's <a href="Image.html#modifyImage">modifyImage()</a> method 2969 should be invoked to reduce the reference count on the underlying image 2970 to one. If this is not done, then it is possible for a previous 2971 generation of the image to be modified due to the use of reference 2972 counting when copying or constructing an Image.<br /> 2973 </p> 2974 <p>Depending on the capabilities of the operating system, and the 2975 relationship of the window to the image, the pixel cache may be a copy 2976 of the pixels in the selected window, or it may be the actual image 2977 pixels. In any case calling <i>syncPixels()</i> insures that the base 2978 image is updated with the contents of the modified pixel cache. The 2979 method <i> readPixels()</i> supports copying foreign pixel data 2980 formats 2981 into the pixel cache according to the <i>QuantumTypes</i>. The method <i>writePixels()</i> 2982 supports copying the pixels in the cache to a foreign pixel 2983 representation according to the format specified by <i>QuantumTypes</i>.</p> 2984 <p>The pixel region is effectively a small image in which the pixels 2985 may be accessed, addressed, and updated, as shown in the following 2986 example:</p> 2987 <pre class="code"> 2988 <img class="icon" src="Cache.png" name="Graphic1" width="254" border="0" alt="cache" /> 2989 Image image("cow.png"); 2990 // Ensure that there are no other references to this image. 2991 image.modifyImage(); 2992 // Set the image type to TrueColor DirectClass representation. 2993 image.type(TrueColorType); 2994 // Request pixel region with size 60x40, and top origin at 20x30 2995 ssize_t columns = 60; 2996 PixelPacket *pixel_cache = image.getPixels(20,30,columns,40); 2997 // Set pixel at column 5, and row 10 in the pixel cache to red. 2998 ssize_t column = 5; 2999 ssize_t row = 10; 3000 PixelPacket *pixel = pixel_cache+row*columns+column; 3001 *pixel = Color("red"); 3002 // Save changes to underlying image . 3003 image.syncPixels(); 3004 // Save updated image to file. 3005 image.write("horse.png"); 3006 </pre> 3007 <p>The image cache supports the following methods: <br /> 3008  </p> 3009 <table border="1" width="100%"> 3010 <caption>Image Cache Methods</caption> <tbody> 3011 <tr> 3012 <td> 3013 <center><b>Method</b></center> 3014 </td> 3015 <td> 3016 <center><b>Returns</b></center> 3017 </td> 3018 <td> 3019 <center><b>Signature</b></center> 3020 </td> 3021 <td> 3022 <center><b>Description</b></center> 3023 </td> 3024 </tr> 3025 <tr> 3026 <td> 3027 <center><a name="getConstPixels"></a> <font size="-1">getConstPixels</font></center> 3028 </td> 3029 <td><font size="-1">const <a href="PixelPacket.html">PixelPacket</a> 3030 *</font></td> 3031 <td><font size="-1">const ssize_t x_, const ssize_t y_, const size_t 3032 columns_, const size_t rows_</font></td> 3033 <td><font size="-1">Transfers pixels from the image to the pixel 3034 cache as defined by the specified rectangular region. </font><font 3035 size="-1">The returned pointer remains valid until the next getPixel, 3036 getConstPixels, or setPixels call and should never be deallocated by 3037 the 3038 user.</font></td> 3039 </tr> 3040 <tr> 3041 <td> 3042 <center><a name="getConstIndexes"></a> <font size="-1">getConstIndexes</font></center> 3043 </td> 3044 <td><font size="-1">const IndexPacket*</font></td> 3045 <td><font size="-1">void</font></td> 3046 <td><font size="-1">Returns a pointer to the Image pixel indexes 3047 corresponding to a previous </font><font size="-1">getPixel, 3048 getConstPixels, or setPixels call.  </font><font size="-1">The 3049 returned pointer remains valid until the next getPixel, getConstPixels, 3050 or setPixels call and should never be deallocated by the user.</font><font 3051 size="-1"> Only valid for PseudoClass images or CMYKA images. The 3052 pixel indexes represent an array of type IndexPacket, with each entry 3053 corresponding to an x,y pixel position. For PseudoClass images, the 3054 entry's value is the offset into the colormap (see <a href="Image.html#colorMap">colorMap</a> 3055 ) for that pixel. For CMYKA images, the indexes are used to contain the 3056 alpha channel.</font></td> 3057 </tr> 3058 <tr> 3059 <td> 3060 <center><a name="getIndexes"></a> <font size="-1">getIndexes</font></center> 3061 </td> 3062 <td><font size="-1">IndexPacket*</font></td> 3063 <td><font size="-1">void</font></td> 3064 <td><font size="-1">Returns a pointer to the Image pixel indexes 3065 corresponding to the pixel region requested by the last <a 3066 href="Image.html#getConstPixels">getConstPixels</a> , <a href="Image.html#getPixels">getPixels</a> 3067 , or <a href="Image.html#setPixels">setPixels</a> call. </font><font 3068 size="-1">The 3069 returned pointer remains valid until the next getPixel, getConstPixels, 3070 or setPixels call and should never be deallocated by the user.</font><font 3071 size="-1"> </font><font size="-1">Only valid for PseudoClass images 3072 or 3073 CMYKA images. The pixel indexes represent an array of type 3074 IndexPacket, with each entry corresponding to a pixel x,y position. For 3075 PseudoClass images, the entry's value is the offset into the colormap 3076 (see <a href="Image.html#colorMap">colorMap</a> ) for that pixel. For 3077 CMYKA 3078 images, the indexes are used to contain the alpha channel.</font></td> 3079 </tr> 3080 <tr> 3081 <td> 3082 <center><a name="getPixels"></a> <font size="-1">getPixels</font></center> 3083 </td> 3084 <td><font size="-1"><a href="PixelPacket.html">PixelPacket</a> *</font></td> 3085 <td><font size="-1">const ssize_t x_, const ssize_t y_, const size_t 3086 columns_, const size_t rows_</font></td> 3087 <td><font size="-1">Transfers pixels from the image to the pixel 3088 cache as defined by the specified rectangular region. Modified pixels 3089 may be subsequently transferred back to the image via syncPixels. </font><font 3090 size="-1">The returned pointer remains valid until the next getPixel, 3091 getConstPixels, or setPixels call and should never be deallocated by 3092 the 3093 user.</font><font size="-1"></font></td> 3094 </tr> 3095 <tr> 3096 <td> 3097 <center><a name="setPixels"></a> <font size="-1">setPixels</font></center> 3098 </td> 3099 <td><font size="-1"><a href="PixelPacket.html">PixelPacket</a> *</font></td> 3100 <td><font size="-1">const ssize_t x_, const ssize_t y_, const size_t 3101 columns_, const size_t rows_</font></td> 3102 <td><font size="-1">Allocates a pixel cache region to store image 3103 pixels as defined by the region rectangle.  This area is 3104 subsequently transferred from the pixel cache to the image via 3105 syncPixels. </font><font size="-1">The returned pointer remains 3106 valid until the next getPixel, getConstPixels, or setPixels call and 3107 should never be deallocated by the user.</font></td> 3108 </tr> 3109 <tr> 3110 <td> 3111 <center><a name="syncPixels"></a> <font size="-1">syncPixels</font></center> 3112 </td> 3113 <td><font size="-1">void</font></td> 3114 <td><font size="-1">void</font></td> 3115 <td><font size="-1">Transfers the image cache pixels to the image.</font></td> 3116 </tr> 3117 <tr> 3118 <td> 3119 <center><a name="readPixels"></a> <font size="-1">readPixels</font></center> 3120 </td> 3121 <td><font size="-1">void</font></td> 3122 <td><font size="-1"><a href="Enumerations.html#QuantumTypes">QuantumTypes</a> 3123 quantum_, unsigned char *source_,</font></td> 3124 <td><font size="-1">Transfers one or more pixel components from a 3125 buffer or file into the image pixel cache of an image. ReadPixels is 3126 typically used to support image decoders. The region transferred 3127 corresponds to the region set by a preceding setPixels call.</font></td> 3128 </tr> 3129 <tr> 3130 <td> 3131 <center><a name="writePixels"></a> <font size="-1">writePixels</font></center> 3132 </td> 3133 <td><font size="-1">void</font></td> 3134 <td><font size="-1"><a href="Enumerations.html#QuantumTypes">QuantumTypes</a> 3135 quantum_, unsigned char *destination_</font></td> 3136 <td><font size="-1">Transfers one or more pixel components from 3137 the image pixel cache to a buffer or file. WritePixels is typically 3138 used to support image encoders. The region transferred corresponds to 3139 the region set by a preceding getPixels or getConstPixels call.</font></td> 3140 </tr> 3141 </tbody> 3142 </table> 3143 </div> 3144 </body> 3145 </html> 3146
