1 /* 2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) 3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice including the dates of first publication and 13 * either this permission notice or a reference to 14 * http://oss.sgi.com/projects/FreeB/ 15 * shall be included in all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF 22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 * 25 * Except as contained in this notice, the name of Silicon Graphics, Inc. 26 * shall not be used in advertising or otherwise to promote the sale, use or 27 * other dealings in this Software without prior written authorization from 28 * Silicon Graphics, Inc. 29 */ 30 31 #include "packrender.h" 32 33 static const GLubyte MsbToLsbTable[256] = { 34 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 35 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, 36 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, 37 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 38 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 39 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, 40 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, 41 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 42 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 43 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, 44 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, 45 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 46 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, 47 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, 48 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 49 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 50 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, 51 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, 52 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 53 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 54 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, 55 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, 56 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 57 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 58 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, 59 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 60 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 61 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, 62 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, 63 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 64 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 65 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, 66 }; 67 68 static const GLubyte LowBitsMask[9] = { 69 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff, 70 }; 71 72 static const GLubyte HighBitsMask[9] = { 73 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff, 74 }; 75 76 77 /* 78 ** Copy bitmap data from clients packed memory applying unpacking modes as the 79 ** data is transfered into the destImage buffer. Return in modes the 80 ** set of pixel modes that are to be done by the server. 81 */ 82 static void 83 FillBitmap(struct glx_context * gc, GLint width, GLint height, 84 GLenum format, const GLvoid * userdata, GLubyte * destImage) 85 { 86 const __GLXattribute *state = gc->client_state_private; 87 GLint rowLength = state->storeUnpack.rowLength; 88 GLint alignment = state->storeUnpack.alignment; 89 GLint skipPixels = state->storeUnpack.skipPixels; 90 GLint skipRows = state->storeUnpack.skipRows; 91 GLint lsbFirst = state->storeUnpack.lsbFirst; 92 GLint elementsLeft, bitOffset, currentByte, nextByte, highBitMask; 93 GLint lowBitMask, i; 94 GLint components, groupsPerRow, rowSize, padding, elementsPerRow; 95 const GLubyte *start, *iter; 96 97 if (rowLength > 0) { 98 groupsPerRow = rowLength; 99 } 100 else { 101 groupsPerRow = width; 102 } 103 components = __glElementsPerGroup(format, GL_BITMAP); 104 rowSize = (groupsPerRow * components + 7) >> 3; 105 padding = (rowSize % alignment); 106 if (padding) { 107 rowSize += alignment - padding; 108 } 109 start = ((const GLubyte *) userdata) + skipRows * rowSize + 110 ((skipPixels * components) >> 3); 111 bitOffset = (skipPixels * components) & 7; 112 highBitMask = LowBitsMask[8 - bitOffset]; 113 lowBitMask = HighBitsMask[bitOffset]; 114 elementsPerRow = width * components; 115 for (i = 0; i < height; i++) { 116 elementsLeft = elementsPerRow; 117 iter = start; 118 while (elementsLeft) { 119 /* First retrieve low bits from current byte */ 120 if (lsbFirst) { 121 currentByte = MsbToLsbTable[iter[0]]; 122 } 123 else { 124 currentByte = iter[0]; 125 } 126 if (bitOffset) { 127 /* Need to read next byte to finish current byte */ 128 if (elementsLeft > (8 - bitOffset)) { 129 if (lsbFirst) { 130 nextByte = MsbToLsbTable[iter[1]]; 131 } 132 else { 133 nextByte = iter[1]; 134 } 135 currentByte = 136 ((currentByte & highBitMask) << bitOffset) | 137 ((nextByte & lowBitMask) >> (8 - bitOffset)); 138 } 139 else { 140 currentByte = ((currentByte & highBitMask) << bitOffset); 141 } 142 } 143 if (elementsLeft >= 8) { 144 *destImage = currentByte; 145 elementsLeft -= 8; 146 } 147 else { 148 *destImage = currentByte & HighBitsMask[elementsLeft]; 149 elementsLeft = 0; 150 } 151 destImage++; 152 iter++; 153 } 154 start += rowSize; 155 } 156 } 157 158 /* 159 ** Extract array from user's data applying all pixel store modes. 160 ** The internal packed array format used has LSB_FIRST = FALSE and 161 ** ALIGNMENT = 1. 162 */ 163 void 164 __glFillImage(struct glx_context * gc, GLint dim, GLint width, GLint height, 165 GLint depth, GLenum format, GLenum type, 166 const GLvoid * userdata, GLubyte * newimage, GLubyte * modes) 167 { 168 const __GLXattribute *state = gc->client_state_private; 169 GLint rowLength = state->storeUnpack.rowLength; 170 GLint imageHeight = state->storeUnpack.imageHeight; 171 GLint alignment = state->storeUnpack.alignment; 172 GLint skipPixels = state->storeUnpack.skipPixels; 173 GLint skipRows = state->storeUnpack.skipRows; 174 GLint skipImages = state->storeUnpack.skipImages; 175 GLint swapBytes = state->storeUnpack.swapEndian; 176 GLint components, elementSize, rowSize, padding, groupsPerRow, groupSize; 177 GLint elementsPerRow, imageSize, rowsPerImage, h, i, j, k; 178 const GLubyte *start, *iter, *itera, *iterb, *iterc; 179 GLubyte *iter2; 180 181 if (type == GL_BITMAP) { 182 FillBitmap(gc, width, height, format, userdata, newimage); 183 } 184 else { 185 components = __glElementsPerGroup(format, type); 186 if (rowLength > 0) { 187 groupsPerRow = rowLength; 188 } 189 else { 190 groupsPerRow = width; 191 } 192 if (imageHeight > 0) { 193 rowsPerImage = imageHeight; 194 } 195 else { 196 rowsPerImage = height; 197 } 198 199 elementSize = __glBytesPerElement(type); 200 groupSize = elementSize * components; 201 if (elementSize == 1) 202 swapBytes = 0; 203 204 rowSize = groupsPerRow * groupSize; 205 padding = (rowSize % alignment); 206 if (padding) { 207 rowSize += alignment - padding; 208 } 209 imageSize = rowSize * rowsPerImage; 210 start = ((const GLubyte *) userdata) + skipImages * imageSize + 211 skipRows * rowSize + skipPixels * groupSize; 212 iter2 = newimage; 213 elementsPerRow = width * components; 214 215 if (swapBytes) { 216 itera = start; 217 for (h = 0; h < depth; h++) { 218 iterb = itera; 219 for (i = 0; i < height; i++) { 220 iterc = iterb; 221 for (j = 0; j < elementsPerRow; j++) { 222 for (k = 1; k <= elementSize; k++) { 223 iter2[k - 1] = iterc[elementSize - k]; 224 } 225 iter2 += elementSize; 226 iterc += elementSize; 227 } 228 iterb += rowSize; 229 } 230 itera += imageSize; 231 } 232 } 233 else { 234 itera = start; 235 for (h = 0; h < depth; h++) { 236 if (rowSize == elementsPerRow * elementSize) { 237 /* Ha! This is mondo easy! */ 238 __GLX_MEM_COPY(iter2, itera, 239 elementsPerRow * elementSize * height); 240 iter2 += elementsPerRow * elementSize * height; 241 } 242 else { 243 iter = itera; 244 for (i = 0; i < height; i++) { 245 __GLX_MEM_COPY(iter2, iter, elementsPerRow * elementSize); 246 iter2 += elementsPerRow * elementSize; 247 iter += rowSize; 248 } 249 } 250 itera += imageSize; 251 } 252 } 253 } 254 255 /* Setup store modes that describe what we just did */ 256 if (modes) { 257 if (dim < 3) { 258 (void) memcpy(modes, __glXDefaultPixelStore + 4, 20); 259 } 260 else { 261 (void) memcpy(modes, __glXDefaultPixelStore + 0, 36); 262 } 263 } 264 } 265 266 /* 267 ** Empty a bitmap in LSB_FIRST=GL_FALSE and ALIGNMENT=4 format packing it 268 ** into the clients memory using the pixel store PACK modes. 269 */ 270 static void 271 EmptyBitmap(struct glx_context * gc, GLint width, GLint height, 272 GLenum format, const GLubyte * sourceImage, GLvoid * userdata) 273 { 274 const __GLXattribute *state = gc->client_state_private; 275 GLint rowLength = state->storePack.rowLength; 276 GLint alignment = state->storePack.alignment; 277 GLint skipPixels = state->storePack.skipPixels; 278 GLint skipRows = state->storePack.skipRows; 279 GLint lsbFirst = state->storePack.lsbFirst; 280 GLint components, groupsPerRow, rowSize, padding, elementsPerRow; 281 GLint sourceRowSize, sourcePadding, sourceSkip; 282 GLubyte *start, *iter; 283 GLint elementsLeft, bitOffset, currentByte, highBitMask, lowBitMask; 284 GLint writeMask, i; 285 GLubyte writeByte; 286 287 components = __glElementsPerGroup(format, GL_BITMAP); 288 if (rowLength > 0) { 289 groupsPerRow = rowLength; 290 } 291 else { 292 groupsPerRow = width; 293 } 294 295 rowSize = (groupsPerRow * components + 7) >> 3; 296 padding = (rowSize % alignment); 297 if (padding) { 298 rowSize += alignment - padding; 299 } 300 sourceRowSize = (width * components + 7) >> 3; 301 sourcePadding = (sourceRowSize % 4); 302 if (sourcePadding) { 303 sourceSkip = 4 - sourcePadding; 304 } 305 else { 306 sourceSkip = 0; 307 } 308 start = ((GLubyte *) userdata) + skipRows * rowSize + 309 ((skipPixels * components) >> 3); 310 bitOffset = (skipPixels * components) & 7; 311 highBitMask = LowBitsMask[8 - bitOffset]; 312 lowBitMask = HighBitsMask[bitOffset]; 313 elementsPerRow = width * components; 314 for (i = 0; i < height; i++) { 315 elementsLeft = elementsPerRow; 316 iter = start; 317 writeMask = highBitMask; 318 writeByte = 0; 319 while (elementsLeft) { 320 /* Set up writeMask (to write to current byte) */ 321 if (elementsLeft + bitOffset < 8) { 322 /* Need to trim writeMask */ 323 writeMask &= HighBitsMask[bitOffset + elementsLeft]; 324 } 325 326 if (lsbFirst) { 327 currentByte = MsbToLsbTable[iter[0]]; 328 } 329 else { 330 currentByte = iter[0]; 331 } 332 333 if (bitOffset) { 334 writeByte |= (sourceImage[0] >> bitOffset); 335 currentByte = (currentByte & ~writeMask) | 336 (writeByte & writeMask); 337 writeByte = (sourceImage[0] << (8 - bitOffset)); 338 } 339 else { 340 currentByte = (currentByte & ~writeMask) | 341 (sourceImage[0] & writeMask); 342 } 343 344 if (lsbFirst) { 345 iter[0] = MsbToLsbTable[currentByte]; 346 } 347 else { 348 iter[0] = currentByte; 349 } 350 351 if (elementsLeft >= 8) { 352 elementsLeft -= 8; 353 } 354 else { 355 elementsLeft = 0; 356 } 357 sourceImage++; 358 iter++; 359 writeMask = 0xff; 360 } 361 if (writeByte) { 362 /* Some data left over that still needs writing */ 363 writeMask &= lowBitMask; 364 if (lsbFirst) { 365 currentByte = MsbToLsbTable[iter[0]]; 366 } 367 else { 368 currentByte = iter[0]; 369 } 370 currentByte = (currentByte & ~writeMask) | (writeByte & writeMask); 371 if (lsbFirst) { 372 iter[0] = MsbToLsbTable[currentByte]; 373 } 374 else { 375 iter[0] = currentByte; 376 } 377 } 378 start += rowSize; 379 sourceImage += sourceSkip; 380 } 381 } 382 383 /* 384 ** Insert array into user's data applying all pixel store modes. 385 ** The packed array format from the server is LSB_FIRST = FALSE, 386 ** SWAP_BYTES = the current pixel storage pack mode, and ALIGNMENT = 4. 387 ** Named __glEmptyImage() because it is the opposite of __glFillImage(). 388 */ 389 /* ARGSUSED */ 390 void 391 __glEmptyImage(struct glx_context * gc, GLint dim, GLint width, GLint height, 392 GLint depth, GLenum format, GLenum type, 393 const GLubyte * sourceImage, GLvoid * userdata) 394 { 395 const __GLXattribute *state = gc->client_state_private; 396 GLint rowLength = state->storePack.rowLength; 397 GLint imageHeight = state->storePack.imageHeight; 398 GLint alignment = state->storePack.alignment; 399 GLint skipPixels = state->storePack.skipPixels; 400 GLint skipRows = state->storePack.skipRows; 401 GLint skipImages = state->storePack.skipImages; 402 GLint components, elementSize, rowSize, padding, groupsPerRow, groupSize; 403 GLint elementsPerRow, sourceRowSize, sourcePadding, h, i; 404 GLint imageSize, rowsPerImage; 405 GLubyte *start, *iter, *itera; 406 407 if (type == GL_BITMAP) { 408 EmptyBitmap(gc, width, height, format, sourceImage, userdata); 409 } 410 else { 411 components = __glElementsPerGroup(format, type); 412 if (rowLength > 0) { 413 groupsPerRow = rowLength; 414 } 415 else { 416 groupsPerRow = width; 417 } 418 if (imageHeight > 0) { 419 rowsPerImage = imageHeight; 420 } 421 else { 422 rowsPerImage = height; 423 } 424 elementSize = __glBytesPerElement(type); 425 groupSize = elementSize * components; 426 rowSize = groupsPerRow * groupSize; 427 padding = (rowSize % alignment); 428 if (padding) { 429 rowSize += alignment - padding; 430 } 431 sourceRowSize = width * groupSize; 432 sourcePadding = (sourceRowSize % 4); 433 if (sourcePadding) { 434 sourceRowSize += 4 - sourcePadding; 435 } 436 imageSize = sourceRowSize * rowsPerImage; 437 start = ((GLubyte *) userdata) + skipImages * imageSize + 438 skipRows * rowSize + skipPixels * groupSize; 439 elementsPerRow = width * components; 440 441 itera = start; 442 for (h = 0; h < depth; h++) { 443 if ((rowSize == sourceRowSize) && (sourcePadding == 0)) { 444 /* Ha! This is mondo easy! */ 445 __GLX_MEM_COPY(itera, sourceImage, 446 elementsPerRow * elementSize * height); 447 sourceImage += elementsPerRow * elementSize * height; 448 } 449 else { 450 iter = itera; 451 for (i = 0; i < height; i++) { 452 __GLX_MEM_COPY(iter, sourceImage, 453 elementsPerRow * elementSize); 454 sourceImage += sourceRowSize; 455 iter += rowSize; 456 } 457 } 458 itera += imageSize; 459 } 460 } 461 } 462
