1 /* -*- mode: c; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3; coding: utf-8-unix -*- */
3 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
4 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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7 * copy of this software and associated documentation files (the "Software"),
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11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice including the dates of first publication and
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15 * http://oss.sgi.com/projects/FreeB/
16 * shall be included in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
23 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 * Except as contained in this notice, the name of Silicon Graphics, Inc.
27 * shall not be used in advertising or otherwise to promote the sale, use or
28 * other dealings in this Software without prior written authorization from
29 * Silicon Graphics, Inc.
32 #include "packrender.h"
34 static const GLubyte MsbToLsbTable
[256] = {
35 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
36 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
37 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
38 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
39 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
40 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
41 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
42 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
43 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
44 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
45 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
46 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
47 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
48 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
49 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
50 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
51 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
52 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
53 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
54 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
55 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
56 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
57 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
58 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
59 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
60 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
61 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
62 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
63 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
64 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
65 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
66 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
69 static const GLubyte LowBitsMask
[9] = {
70 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff,
73 static const GLubyte HighBitsMask
[9] = {
74 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff,
79 ** Copy bitmap data from clients packed memory applying unpacking modes as the
80 ** data is transfered into the destImage buffer. Return in modes the
81 ** set of pixel modes that are to be done by the server.
84 FillBitmap(__GLXcontext
* gc
, GLint width
, GLint height
,
85 GLenum format
, const GLvoid
* userdata
, GLubyte
* destImage
)
87 const __GLXattribute
*state
= gc
->client_state_private
;
88 GLint rowLength
= state
->storeUnpack
.rowLength
;
89 GLint alignment
= state
->storeUnpack
.alignment
;
90 GLint skipPixels
= state
->storeUnpack
.skipPixels
;
91 GLint skipRows
= state
->storeUnpack
.skipRows
;
92 GLint lsbFirst
= state
->storeUnpack
.lsbFirst
;
93 GLint elementsLeft
, bitOffset
, currentByte
, nextByte
, highBitMask
;
95 GLint components
, groupsPerRow
, rowSize
, padding
, elementsPerRow
;
96 const GLubyte
*start
, *iter
;
99 groupsPerRow
= rowLength
;
102 groupsPerRow
= width
;
104 components
= __glElementsPerGroup(format
, GL_BITMAP
);
105 rowSize
= (groupsPerRow
* components
+ 7) >> 3;
106 padding
= (rowSize
% alignment
);
108 rowSize
+= alignment
- padding
;
110 start
= ((const GLubyte
*) userdata
) + skipRows
* rowSize
+
111 ((skipPixels
* components
) >> 3);
112 bitOffset
= (skipPixels
* components
) & 7;
113 highBitMask
= LowBitsMask
[8 - bitOffset
];
114 lowBitMask
= HighBitsMask
[bitOffset
];
115 elementsPerRow
= width
* components
;
116 for (i
= 0; i
< height
; i
++) {
117 elementsLeft
= elementsPerRow
;
119 while (elementsLeft
) {
120 /* First retrieve low bits from current byte */
122 currentByte
= MsbToLsbTable
[iter
[0]];
125 currentByte
= iter
[0];
128 /* Need to read next byte to finish current byte */
129 if (elementsLeft
> (8 - bitOffset
)) {
131 nextByte
= MsbToLsbTable
[iter
[1]];
137 ((currentByte
& highBitMask
) << bitOffset
) |
138 ((nextByte
& lowBitMask
) >> (8 - bitOffset
));
141 currentByte
= ((currentByte
& highBitMask
) << bitOffset
);
144 if (elementsLeft
>= 8) {
145 *destImage
= currentByte
;
149 *destImage
= currentByte
& HighBitsMask
[elementsLeft
];
160 ** Extract array from user's data applying all pixel store modes.
161 ** The internal packed array format used has LSB_FIRST = FALSE and
165 __glFillImage(__GLXcontext
* gc
, GLint dim
, GLint width
, GLint height
,
166 GLint depth
, GLenum format
, GLenum type
,
167 const GLvoid
* userdata
, GLubyte
* newimage
, GLubyte
* modes
)
169 const __GLXattribute
*state
= gc
->client_state_private
;
170 GLint rowLength
= state
->storeUnpack
.rowLength
;
171 GLint imageHeight
= state
->storeUnpack
.imageHeight
;
172 GLint alignment
= state
->storeUnpack
.alignment
;
173 GLint skipPixels
= state
->storeUnpack
.skipPixels
;
174 GLint skipRows
= state
->storeUnpack
.skipRows
;
175 GLint skipImages
= state
->storeUnpack
.skipImages
;
176 GLint swapBytes
= state
->storeUnpack
.swapEndian
;
177 GLint components
, elementSize
, rowSize
, padding
, groupsPerRow
, groupSize
;
178 GLint elementsPerRow
, imageSize
, rowsPerImage
, h
, i
, j
, k
;
179 const GLubyte
*start
, *iter
, *itera
, *iterb
, *iterc
;
182 if (type
== GL_BITMAP
) {
183 FillBitmap(gc
, width
, height
, format
, userdata
, newimage
);
186 components
= __glElementsPerGroup(format
, type
);
188 groupsPerRow
= rowLength
;
191 groupsPerRow
= width
;
193 if (imageHeight
> 0) {
194 rowsPerImage
= imageHeight
;
197 rowsPerImage
= height
;
200 elementSize
= __glBytesPerElement(type
);
201 groupSize
= elementSize
* components
;
202 if (elementSize
== 1)
205 rowSize
= groupsPerRow
* groupSize
;
206 padding
= (rowSize
% alignment
);
208 rowSize
+= alignment
- padding
;
210 imageSize
= rowSize
* rowsPerImage
;
211 start
= ((const GLubyte
*) userdata
) + skipImages
* imageSize
+
212 skipRows
* rowSize
+ skipPixels
* groupSize
;
214 elementsPerRow
= width
* components
;
218 for (h
= 0; h
< depth
; h
++) {
220 for (i
= 0; i
< height
; i
++) {
222 for (j
= 0; j
< elementsPerRow
; j
++) {
223 for (k
= 1; k
<= elementSize
; k
++) {
224 iter2
[k
- 1] = iterc
[elementSize
- k
];
226 iter2
+= elementSize
;
227 iterc
+= elementSize
;
236 for (h
= 0; h
< depth
; h
++) {
237 if (rowSize
== elementsPerRow
* elementSize
) {
238 /* Ha! This is mondo easy! */
239 __GLX_MEM_COPY(iter2
, itera
,
240 elementsPerRow
* elementSize
* height
);
241 iter2
+= elementsPerRow
* elementSize
* height
;
245 for (i
= 0; i
< height
; i
++) {
246 __GLX_MEM_COPY(iter2
, iter
, elementsPerRow
* elementSize
);
247 iter2
+= elementsPerRow
* elementSize
;
256 /* Setup store modes that describe what we just did */
259 (void) memcpy(modes
, __glXDefaultPixelStore
+ 4, 20);
262 (void) memcpy(modes
, __glXDefaultPixelStore
+ 0, 36);
268 ** Empty a bitmap in LSB_FIRST=GL_FALSE and ALIGNMENT=4 format packing it
269 ** into the clients memory using the pixel store PACK modes.
272 EmptyBitmap(__GLXcontext
* gc
, GLint width
, GLint height
,
273 GLenum format
, const GLubyte
* sourceImage
, GLvoid
* userdata
)
275 const __GLXattribute
*state
= gc
->client_state_private
;
276 GLint rowLength
= state
->storePack
.rowLength
;
277 GLint alignment
= state
->storePack
.alignment
;
278 GLint skipPixels
= state
->storePack
.skipPixels
;
279 GLint skipRows
= state
->storePack
.skipRows
;
280 GLint lsbFirst
= state
->storePack
.lsbFirst
;
281 GLint components
, groupsPerRow
, rowSize
, padding
, elementsPerRow
;
282 GLint sourceRowSize
, sourcePadding
, sourceSkip
;
283 GLubyte
*start
, *iter
;
284 GLint elementsLeft
, bitOffset
, currentByte
, highBitMask
, lowBitMask
;
288 components
= __glElementsPerGroup(format
, GL_BITMAP
);
290 groupsPerRow
= rowLength
;
293 groupsPerRow
= width
;
296 rowSize
= (groupsPerRow
* components
+ 7) >> 3;
297 padding
= (rowSize
% alignment
);
299 rowSize
+= alignment
- padding
;
301 sourceRowSize
= (width
* components
+ 7) >> 3;
302 sourcePadding
= (sourceRowSize
% 4);
304 sourceSkip
= 4 - sourcePadding
;
309 start
= ((GLubyte
*) userdata
) + skipRows
* rowSize
+
310 ((skipPixels
* components
) >> 3);
311 bitOffset
= (skipPixels
* components
) & 7;
312 highBitMask
= LowBitsMask
[8 - bitOffset
];
313 lowBitMask
= HighBitsMask
[bitOffset
];
314 elementsPerRow
= width
* components
;
315 for (i
= 0; i
< height
; i
++) {
316 elementsLeft
= elementsPerRow
;
318 writeMask
= highBitMask
;
320 while (elementsLeft
) {
321 /* Set up writeMask (to write to current byte) */
322 if (elementsLeft
+ bitOffset
< 8) {
323 /* Need to trim writeMask */
324 writeMask
&= HighBitsMask
[bitOffset
+ elementsLeft
];
328 currentByte
= MsbToLsbTable
[iter
[0]];
331 currentByte
= iter
[0];
335 writeByte
|= (sourceImage
[0] >> bitOffset
);
336 currentByte
= (currentByte
& ~writeMask
) |
337 (writeByte
& writeMask
);
338 writeByte
= (sourceImage
[0] << (8 - bitOffset
));
341 currentByte
= (currentByte
& ~writeMask
) |
342 (sourceImage
[0] & writeMask
);
346 iter
[0] = MsbToLsbTable
[currentByte
];
349 iter
[0] = currentByte
;
352 if (elementsLeft
>= 8) {
363 /* Some data left over that still needs writing */
364 writeMask
&= lowBitMask
;
366 currentByte
= MsbToLsbTable
[iter
[0]];
369 currentByte
= iter
[0];
371 currentByte
= (currentByte
& ~writeMask
) | (writeByte
& writeMask
);
373 iter
[0] = MsbToLsbTable
[currentByte
];
376 iter
[0] = currentByte
;
380 sourceImage
+= sourceSkip
;
385 ** Insert array into user's data applying all pixel store modes.
386 ** The packed array format from the server is LSB_FIRST = FALSE,
387 ** SWAP_BYTES = the current pixel storage pack mode, and ALIGNMENT = 4.
388 ** Named __glEmptyImage() because it is the opposite of __glFillImage().
392 __glEmptyImage(__GLXcontext
* gc
, GLint dim
, GLint width
, GLint height
,
393 GLint depth
, GLenum format
, GLenum type
,
394 const GLubyte
* sourceImage
, GLvoid
* userdata
)
396 const __GLXattribute
*state
= gc
->client_state_private
;
397 GLint rowLength
= state
->storePack
.rowLength
;
398 GLint imageHeight
= state
->storePack
.imageHeight
;
399 GLint alignment
= state
->storePack
.alignment
;
400 GLint skipPixels
= state
->storePack
.skipPixels
;
401 GLint skipRows
= state
->storePack
.skipRows
;
402 GLint skipImages
= state
->storePack
.skipImages
;
403 GLint components
, elementSize
, rowSize
, padding
, groupsPerRow
, groupSize
;
404 GLint elementsPerRow
, sourceRowSize
, sourcePadding
, h
, i
;
405 GLint imageSize
, rowsPerImage
;
406 GLubyte
*start
, *iter
, *itera
;
408 if (type
== GL_BITMAP
) {
409 EmptyBitmap(gc
, width
, height
, format
, sourceImage
, userdata
);
412 components
= __glElementsPerGroup(format
, type
);
414 groupsPerRow
= rowLength
;
417 groupsPerRow
= width
;
419 if (imageHeight
> 0) {
420 rowsPerImage
= imageHeight
;
423 rowsPerImage
= height
;
425 elementSize
= __glBytesPerElement(type
);
426 groupSize
= elementSize
* components
;
427 rowSize
= groupsPerRow
* groupSize
;
428 padding
= (rowSize
% alignment
);
430 rowSize
+= alignment
- padding
;
432 sourceRowSize
= width
* groupSize
;
433 sourcePadding
= (sourceRowSize
% 4);
435 sourceRowSize
+= 4 - sourcePadding
;
437 imageSize
= sourceRowSize
* rowsPerImage
;
438 start
= ((GLubyte
*) userdata
) + skipImages
* imageSize
+
439 skipRows
* rowSize
+ skipPixels
* groupSize
;
440 elementsPerRow
= width
* components
;
443 for (h
= 0; h
< depth
; h
++) {
444 if ((rowSize
== sourceRowSize
) && (sourcePadding
== 0)) {
445 /* Ha! This is mondo easy! */
446 __GLX_MEM_COPY(itera
, sourceImage
,
447 elementsPerRow
* elementSize
* height
);
448 sourceImage
+= elementsPerRow
* elementSize
* height
;
452 for (i
= 0; i
< height
; i
++) {
453 __GLX_MEM_COPY(iter
, sourceImage
,
454 elementsPerRow
* elementSize
);
455 sourceImage
+= sourceRowSize
;