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31 #include "packrender.h"
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,
68 static const GLubyte LowBitsMask[9] = {
69 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff,
72 static const GLubyte HighBitsMask[9] = {
73 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff,
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.
83 FillBitmap(struct glx_context * gc, GLint width, GLint height,
84 GLenum format, const GLvoid * userdata, GLubyte * destImage)
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;
94 GLint components, groupsPerRow, rowSize, padding, elementsPerRow;
95 const GLubyte *start, *iter;
98 groupsPerRow = rowLength;
101 groupsPerRow = width;
103 components = __glElementsPerGroup(format, GL_BITMAP);
104 rowSize = (groupsPerRow * components + 7) >> 3;
105 padding = (rowSize % alignment);
107 rowSize += alignment - padding;
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;
118 while (elementsLeft) {
119 /* First retrieve low bits from current byte */
121 currentByte = MsbToLsbTable[iter[0]];
124 currentByte = iter[0];
127 /* Need to read next byte to finish current byte */
128 if (elementsLeft > (8 - bitOffset)) {
130 nextByte = MsbToLsbTable[iter[1]];
136 ((currentByte & highBitMask) << bitOffset) |
137 ((nextByte & lowBitMask) >> (8 - bitOffset));
140 currentByte = ((currentByte & highBitMask) << bitOffset);
143 if (elementsLeft >= 8) {
144 *destImage = currentByte;
148 *destImage = currentByte & HighBitsMask[elementsLeft];
159 ** Extract array from user's data applying all pixel store modes.
160 ** The internal packed array format used has LSB_FIRST = FALSE and
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)
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;
181 if (type == GL_BITMAP) {
182 FillBitmap(gc, width, height, format, userdata, newimage);
185 components = __glElementsPerGroup(format, type);
187 groupsPerRow = rowLength;
190 groupsPerRow = width;
192 if (imageHeight > 0) {
193 rowsPerImage = imageHeight;
196 rowsPerImage = height;
199 elementSize = __glBytesPerElement(type);
200 groupSize = elementSize * components;
201 if (elementSize == 1)
204 rowSize = groupsPerRow * groupSize;
205 padding = (rowSize % alignment);
207 rowSize += alignment - padding;
209 imageSize = rowSize * rowsPerImage;
210 start = ((const GLubyte *) userdata) + skipImages * imageSize +
211 skipRows * rowSize + skipPixels * groupSize;
213 elementsPerRow = width * components;
217 for (h = 0; h < depth; h++) {
219 for (i = 0; i < height; i++) {
221 for (j = 0; j < elementsPerRow; j++) {
222 for (k = 1; k <= elementSize; k++) {
223 iter2[k - 1] = iterc[elementSize - k];
225 iter2 += elementSize;
226 iterc += elementSize;
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;
244 for (i = 0; i < height; i++) {
245 __GLX_MEM_COPY(iter2, iter, elementsPerRow * elementSize);
246 iter2 += elementsPerRow * elementSize;
255 /* Setup store modes that describe what we just did */
258 (void) memcpy(modes, __glXDefaultPixelStore + 4, 20);
261 (void) memcpy(modes, __glXDefaultPixelStore + 0, 36);
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.
271 EmptyBitmap(struct glx_context * gc, GLint width, GLint height,
272 GLenum format, const GLubyte * sourceImage, GLvoid * userdata)
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;
287 components = __glElementsPerGroup(format, GL_BITMAP);
289 groupsPerRow = rowLength;
292 groupsPerRow = width;
295 rowSize = (groupsPerRow * components + 7) >> 3;
296 padding = (rowSize % alignment);
298 rowSize += alignment - padding;
300 sourceRowSize = (width * components + 7) >> 3;
301 sourcePadding = (sourceRowSize % 4);
303 sourceSkip = 4 - sourcePadding;
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;
317 writeMask = highBitMask;
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];
327 currentByte = MsbToLsbTable[iter[0]];
330 currentByte = iter[0];
334 writeByte |= (sourceImage[0] >> bitOffset);
335 currentByte = (currentByte & ~writeMask) |
336 (writeByte & writeMask);
337 writeByte = (sourceImage[0] << (8 - bitOffset));
340 currentByte = (currentByte & ~writeMask) |
341 (sourceImage[0] & writeMask);
345 iter[0] = MsbToLsbTable[currentByte];
348 iter[0] = currentByte;
351 if (elementsLeft >= 8) {
362 /* Some data left over that still needs writing */
363 writeMask &= lowBitMask;
365 currentByte = MsbToLsbTable[iter[0]];
368 currentByte = iter[0];
370 currentByte = (currentByte & ~writeMask) | (writeByte & writeMask);
372 iter[0] = MsbToLsbTable[currentByte];
375 iter[0] = currentByte;
379 sourceImage += sourceSkip;
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().
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)
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;
407 if (type == GL_BITMAP) {
408 EmptyBitmap(gc, width, height, format, sourceImage, userdata);
411 components = __glElementsPerGroup(format, type);
413 groupsPerRow = rowLength;
416 groupsPerRow = width;
418 if (imageHeight > 0) {
419 rowsPerImage = imageHeight;
422 rowsPerImage = height;
424 elementSize = __glBytesPerElement(type);
425 groupSize = elementSize * components;
426 rowSize = groupsPerRow * groupSize;
427 padding = (rowSize % alignment);
429 rowSize += alignment - padding;
431 sourceRowSize = width * groupSize;
432 sourcePadding = (sourceRowSize % 4);
434 sourceRowSize += 4 - sourcePadding;
436 imageSize = sourceRowSize * rowsPerImage;
437 start = ((GLubyte *) userdata) + skipImages * imageSize +
438 skipRows * rowSize + skipPixels * groupSize;
439 elementsPerRow = width * components;
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;
451 for (i = 0; i < height; i++) {
452 __GLX_MEM_COPY(iter, sourceImage,
453 elementsPerRow * elementSize);
454 sourceImage += sourceRowSize;