1 /* 2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 3 % % 4 % % 5 % % 6 % N N U U L L % 7 % NN N U U L L % 8 % N N N U U L L % 9 % N NN U U L L % 10 % N N UUU LLLLL LLLLL % 11 % % 12 % % 13 % Read/Write Image Of Uniform Color. % 14 % % 15 % Software Design % 16 % Cristy % 17 % July 1992 % 18 % % 19 % % 20 % Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization % 21 % dedicated to making software imaging solutions freely available. % 22 % % 23 % You may not use this file except in compliance with the License. You may % 24 % obtain a copy of the License at % 25 % % 26 % http://www.imagemagick.org/script/license.php % 27 % % 28 % Unless required by applicable law or agreed to in writing, software % 29 % distributed under the License is distributed on an "AS IS" BASIS, % 30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % 31 % See the License for the specific language governing permissions and % 32 % limitations under the License. % 33 % % 34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 35 % 36 % 37 */ 38 39 /* 41 Include declarations. 42 */ 43 #include "MagickCore/studio.h" 44 #include "MagickCore/blob.h" 45 #include "MagickCore/blob-private.h" 46 #include "MagickCore/cache.h" 47 #include "MagickCore/color.h" 48 #include "MagickCore/color-private.h" 49 #include "MagickCore/colorspace-private.h" 50 #include "MagickCore/exception.h" 51 #include "MagickCore/exception-private.h" 52 #include "MagickCore/image.h" 53 #include "MagickCore/image-private.h" 54 #include "MagickCore/list.h" 55 #include "MagickCore/magick.h" 56 #include "MagickCore/memory_.h" 57 #include "MagickCore/pixel-accessor.h" 58 #include "MagickCore/quantum-private.h" 59 #include "MagickCore/static.h" 60 #include "MagickCore/string_.h" 61 #include "MagickCore/module.h" 62 63 /* 65 Forward declarations. 66 */ 67 static MagickBooleanType 68 WriteNULLImage(const ImageInfo *,Image *,ExceptionInfo *); 69 70 /* 72 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 73 % % 74 % % 75 % % 76 % R e a d N U L L I m a g e % 77 % % 78 % % 79 % % 80 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 81 % 82 % ReadNULLImage creates a constant image and initializes it to the 83 % X server color as specified by the filename. It allocates the memory 84 % necessary for the new Image structure and returns a pointer to the new 85 % image. 86 % 87 % The format of the ReadNULLImage method is: 88 % 89 % Image *ReadNULLImage(const ImageInfo *image_info, 90 % ExceptionInfo *exception) 91 % 92 % A description of each parameter follows: 93 % 94 % o image_info: the image info. 95 % 96 % o exception: return any errors or warnings in this structure. 97 % 98 */ 99 static Image *ReadNULLImage(const ImageInfo *image_info, 100 ExceptionInfo *exception) 101 { 102 Image 103 *image; 104 105 MagickBooleanType 106 status; 107 108 PixelInfo 109 background; 110 111 register ssize_t 112 x; 113 114 register Quantum 115 *q; 116 117 ssize_t 118 y; 119 120 /* 121 Initialize Image structure. 122 */ 123 assert(image_info != (const ImageInfo *) NULL); 124 assert(image_info->signature == MagickCoreSignature); 125 if (image_info->debug != MagickFalse) 126 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", 127 image_info->filename); 128 assert(exception != (ExceptionInfo *) NULL); 129 assert(exception->signature == MagickCoreSignature); 130 image=AcquireImage(image_info,exception); 131 if (image->columns == 0) 132 image->columns=1; 133 if (image->rows == 0) 134 image->rows=1; 135 status=SetImageExtent(image,image->columns,image->rows,exception); 136 if (status == MagickFalse) 137 return(DestroyImageList(image)); 138 ConformPixelInfo(image,&image->background_color,&background,exception); 139 image->alpha_trait=BlendPixelTrait; 140 background.alpha=(double) TransparentAlpha; 141 for (y=0; y < (ssize_t) image->rows; y++) 142 { 143 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); 144 if (q == (Quantum *) NULL) 145 break; 146 for (x=0; x < (ssize_t) image->columns; x++) 147 { 148 SetPixelViaPixelInfo(image,&background,q); 149 q+=GetPixelChannels(image); 150 } 151 if (SyncAuthenticPixels(image,exception) == MagickFalse) 152 break; 153 } 154 return(GetFirstImageInList(image)); 155 } 156 157 /* 159 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 160 % % 161 % % 162 % % 163 % R e g i s t e r N U L L I m a g e % 164 % % 165 % % 166 % % 167 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 168 % 169 % RegisterNULLImage() adds attributes for the NULL image format to 170 % the list of supported formats. The attributes include the image format 171 % tag, a method to read and/or write the format, whether the format 172 % supports the saving of more than one frame to the same file or blob, 173 % whether the format supports native in-memory I/O, and a brief 174 % description of the format. 175 % 176 % The format of the RegisterNULLImage method is: 177 % 178 % size_t RegisterNULLImage(void) 179 % 180 */ 181 ModuleExport size_t RegisterNULLImage(void) 182 { 183 MagickInfo 184 *entry; 185 186 entry=AcquireMagickInfo("NULL","NULL","Constant image of uniform color"); 187 entry->decoder=(DecodeImageHandler *) ReadNULLImage; 188 entry->encoder=(EncodeImageHandler *) WriteNULLImage; 189 entry->flags^=CoderAdjoinFlag; 190 entry->format_type=ImplicitFormatType; 191 (void) RegisterMagickInfo(entry); 192 return(MagickImageCoderSignature); 193 } 194 195 /* 197 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 198 % % 199 % % 200 % % 201 % U n r e g i s t e r N U L L I m a g e % 202 % % 203 % % 204 % % 205 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 206 % 207 % UnregisterNULLImage() removes format registrations made by the 208 % NULL module from the list of supported formats. 209 % 210 % The format of the UnregisterNULLImage method is: 211 % 212 % UnregisterNULLImage(void) 213 % 214 */ 215 ModuleExport void UnregisterNULLImage(void) 216 { 217 (void) UnregisterMagickInfo("NULL"); 218 } 219 220 /* 222 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 223 % % 224 % % 225 % % 226 % W r i t e N U L L I m a g e % 227 % % 228 % % 229 % % 230 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 231 % 232 % WriteNULLImage writes no output at all. It is useful when specified 233 % as an output format when profiling. 234 % 235 % The format of the WriteNULLImage method is: 236 % 237 % MagickBooleanType WriteNULLImage(const ImageInfo *image_info, 238 % Image *image,ExceptionInfo *exception) 239 % 240 % A description of each parameter follows. 241 % 242 % o image_info: the image info. 243 % 244 % o image: The image. 245 % 246 % o exception: return any errors or warnings in this structure. 247 % 248 */ 249 static MagickBooleanType WriteNULLImage(const ImageInfo *image_info, 250 Image *image,ExceptionInfo *exception) 251 { 252 assert(image_info != (const ImageInfo *) NULL); 253 assert(image_info->signature == MagickCoreSignature); 254 assert(image != (Image *) NULL); 255 assert(image->signature == MagickCoreSignature); 256 assert(exception != (ExceptionInfo *) NULL); 257 if (image->debug != MagickFalse) 258 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); 259 return(MagickTrue); 260 } 261
