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radeon/r200/r300: cleanup some of the renderbuffer code
[mesa.git] / src / mesa / drivers / x11 / xm_api.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * 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 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file xm_api.c
27 *
28 * All the XMesa* API functions.
29 *
30 *
31 * NOTES:
32 *
33 * The window coordinate system origin (0,0) is in the lower-left corner
34 * of the window. X11's window coordinate origin is in the upper-left
35 * corner of the window. Therefore, most drawing functions in this
36 * file have to flip Y coordinates.
37 *
38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
39 * in support for the MIT Shared Memory extension. If enabled, when you
40 * use an Ximage for the back buffer in double buffered mode, the "swap"
41 * operation will be faster. You must also link with -lXext.
42 *
43 * Byte swapping: If the Mesa host and the X display use a different
44 * byte order then there's some trickiness to be aware of when using
45 * XImages. The byte ordering used for the XImage is that of the X
46 * display, not the Mesa host.
47 * The color-to-pixel encoding for True/DirectColor must be done
48 * according to the display's visual red_mask, green_mask, and blue_mask.
49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
50 * do byte swapping if needed. If one wants to directly "poke" the pixel
51 * into the XImage's buffer then the pixel must be byte swapped first. In
52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
53 * and use XPutPixel everywhere except in the implementation of
54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
55 * instead of using XPutPixel we "poke" our values after byte-swapping
56 * the clear pixel value if needed.
57 *
58 */
59
60 #ifdef __CYGWIN__
61 #undef WIN32
62 #undef __WIN32__
63 #endif
64
65 #include "glxheader.h"
66 #include "xmesaP.h"
67 #include "main/context.h"
68 #include "main/extensions.h"
69 #include "main/framebuffer.h"
70 #include "main/imports.h"
71 #include "main/macros.h"
72 #include "main/renderbuffer.h"
73 #include "main/teximage.h"
74 #include "glapi/glthread.h"
75 #include "swrast/swrast.h"
76 #include "swrast_setup/swrast_setup.h"
77 #include "vbo/vbo.h"
78 #include "tnl/tnl.h"
79 #include "tnl/t_context.h"
80 #include "tnl/t_pipeline.h"
81 #include "drivers/common/driverfuncs.h"
82
83 /**
84 * Global X driver lock
85 */
86 _glthread_Mutex _xmesa_lock;
87
88
89
90 /**
91 * Lookup tables for HPCR pixel format:
92 */
93 static short hpcr_rgbTbl[3][256] = {
94 {
95 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
96 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
97 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
98 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
99 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
100 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
101 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
102 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
103 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
104 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
105 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
106 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
107 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
108 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
109 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
110 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
111 },
112 {
113 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
114 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
115 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
116 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
117 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
118 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
119 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
120 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
121 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
122 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
123 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
124 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
125 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
126 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
127 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
128 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
129 },
130 {
131 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
132 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
133 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
134 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
135 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
136 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
137 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
138 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
139 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
140 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
141 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
142 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
143 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
144 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
145 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
146 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
147 }
148 };
149
150
151
152 /**********************************************************************/
153 /***** X Utility Functions *****/
154 /**********************************************************************/
155
156
157 /**
158 * Return the host's byte order as LSBFirst or MSBFirst ala X.
159 */
160 #ifndef XFree86Server
161 static int host_byte_order( void )
162 {
163 int i = 1;
164 char *cptr = (char *) &i;
165 return (*cptr==1) ? LSBFirst : MSBFirst;
166 }
167 #endif
168
169
170 /**
171 * Check if the X Shared Memory extension is available.
172 * Return: 0 = not available
173 * 1 = shared XImage support available
174 * 2 = shared Pixmap support available also
175 */
176 static int check_for_xshm( XMesaDisplay *display )
177 {
178 #if defined(USE_XSHM) && !defined(XFree86Server)
179 int major, minor, ignore;
180 Bool pixmaps;
181
182 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
183 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) {
184 return (pixmaps==True) ? 2 : 1;
185 }
186 else {
187 return 0;
188 }
189 }
190 else {
191 return 0;
192 }
193 #else
194 /* No XSHM support */
195 return 0;
196 #endif
197 }
198
199
200 /**
201 * Apply gamma correction to an intensity value in [0..max]. Return the
202 * new intensity value.
203 */
204 static GLint
205 gamma_adjust( GLfloat gamma, GLint value, GLint max )
206 {
207 if (gamma == 1.0) {
208 return value;
209 }
210 else {
211 double x = (double) value / (double) max;
212 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma));
213 }
214 }
215
216
217
218 /**
219 * Return the true number of bits per pixel for XImages.
220 * For example, if we request a 24-bit deep visual we may actually need/get
221 * 32bpp XImages. This function returns the appropriate bpp.
222 * Input: dpy - the X display
223 * visinfo - desribes the visual to be used for XImages
224 * Return: true number of bits per pixel for XImages
225 */
226 static int
227 bits_per_pixel( XMesaVisual xmv )
228 {
229 #ifdef XFree86Server
230 const int depth = xmv->nplanes;
231 int i;
232 assert(depth > 0);
233 for (i = 0; i < screenInfo.numPixmapFormats; i++) {
234 if (screenInfo.formats[i].depth == depth)
235 return screenInfo.formats[i].bitsPerPixel;
236 }
237 return depth; /* should never get here, but this should be safe */
238 #else
239 XMesaDisplay *dpy = xmv->display;
240 XMesaVisualInfo visinfo = xmv->visinfo;
241 XMesaImage *img;
242 int bitsPerPixel;
243 /* Create a temporary XImage */
244 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
245 ZPixmap, 0, /*format, offset*/
246 (char*) MALLOC(8), /*data*/
247 1, 1, /*width, height*/
248 32, /*bitmap_pad*/
249 0 /*bytes_per_line*/
250 );
251 assert(img);
252 /* grab the bits/pixel value */
253 bitsPerPixel = img->bits_per_pixel;
254 /* free the XImage */
255 _mesa_free( img->data );
256 img->data = NULL;
257 XMesaDestroyImage( img );
258 return bitsPerPixel;
259 #endif
260 }
261
262
263
264 /*
265 * Determine if a given X window ID is valid (window exists).
266 * Do this by calling XGetWindowAttributes() for the window and
267 * checking if we catch an X error.
268 * Input: dpy - the display
269 * win - the window to check for existance
270 * Return: GL_TRUE - window exists
271 * GL_FALSE - window doesn't exist
272 */
273 #ifndef XFree86Server
274 static GLboolean WindowExistsFlag;
275
276 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
277 {
278 (void) dpy;
279 if (xerr->error_code == BadWindow) {
280 WindowExistsFlag = GL_FALSE;
281 }
282 return 0;
283 }
284
285 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
286 {
287 XWindowAttributes wa;
288 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
289 WindowExistsFlag = GL_TRUE;
290 old_handler = XSetErrorHandler(window_exists_err_handler);
291 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
292 XSetErrorHandler(old_handler);
293 return WindowExistsFlag;
294 }
295
296 static Status
297 get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
298 {
299 Window root;
300 Status stat;
301 int xpos, ypos;
302 unsigned int w, h, bw, depth;
303 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
304 *width = w;
305 *height = h;
306 return stat;
307 }
308 #endif
309
310
311 /**
312 * Return the size of the window (or pixmap) that corresponds to the
313 * given XMesaBuffer.
314 * \param width returns width in pixels
315 * \param height returns height in pixels
316 */
317 void
318 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
319 GLuint *width, GLuint *height)
320 {
321 #ifdef XFree86Server
322 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH);
323 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT);
324 #else
325 Status stat;
326
327 _glthread_LOCK_MUTEX(_xmesa_lock);
328 XSync(b->xm_visual->display, 0); /* added for Chromium */
329 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
330 _glthread_UNLOCK_MUTEX(_xmesa_lock);
331
332 if (!stat) {
333 /* probably querying a window that's recently been destroyed */
334 _mesa_warning(NULL, "XGetGeometry failed!\n");
335 *width = *height = 1;
336 }
337 #endif
338 }
339
340
341
342 /**********************************************************************/
343 /***** Linked list of XMesaBuffers *****/
344 /**********************************************************************/
345
346 XMesaBuffer XMesaBufferList = NULL;
347
348
349 /**
350 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
351 * Note that XMesaBuffer is derived from GLframebuffer.
352 * The new XMesaBuffer will not have any size (Width=Height=0).
353 *
354 * \param d the corresponding X drawable (window or pixmap)
355 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
356 * \param vis the buffer's visual
357 * \param cmap the window's colormap, if known.
358 * \return new XMesaBuffer or NULL if any problem
359 */
360 static XMesaBuffer
361 create_xmesa_buffer(XMesaDrawable d, BufferType type,
362 XMesaVisual vis, XMesaColormap cmap)
363 {
364 XMesaBuffer b;
365
366 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
367
368 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
369 if (!b)
370 return NULL;
371
372 b->display = vis->display;
373 b->xm_visual = vis;
374 b->type = type;
375 b->cmap = cmap;
376
377 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
378 b->mesa_buffer.Delete = xmesa_delete_framebuffer;
379
380 /*
381 * Front renderbuffer
382 */
383 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE);
384 if (!b->frontxrb) {
385 _mesa_free(b);
386 return NULL;
387 }
388 b->frontxrb->Parent = b;
389 b->frontxrb->drawable = d;
390 b->frontxrb->pixmap = (XMesaPixmap) d;
391 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
392 &b->frontxrb->Base);
393
394 /*
395 * Back renderbuffer
396 */
397 if (vis->mesa_visual.doubleBufferMode) {
398 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE);
399 if (!b->backxrb) {
400 /* XXX free front xrb too */
401 _mesa_free(b);
402 return NULL;
403 }
404 b->backxrb->Parent = b;
405 /* determine back buffer implementation */
406 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
407
408 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
409 &b->backxrb->Base);
410 }
411
412 /*
413 * Software alpha planes
414 */
415 if (vis->mesa_visual.alphaBits > 0
416 && vis->undithered_pf != PF_8A8B8G8R
417 && vis->undithered_pf != PF_8A8R8G8B) {
418 /* Visual has alpha, but pixel format doesn't support it.
419 * We'll use an alpha renderbuffer wrapper.
420 */
421 b->swAlpha = GL_TRUE;
422 }
423 else {
424 b->swAlpha = GL_FALSE;
425 }
426
427 /*
428 * Other renderbuffer (depth, stencil, etc)
429 */
430 _mesa_add_soft_renderbuffers(&b->mesa_buffer,
431 GL_FALSE, /* color */
432 vis->mesa_visual.haveDepthBuffer,
433 vis->mesa_visual.haveStencilBuffer,
434 vis->mesa_visual.haveAccumBuffer,
435 b->swAlpha,
436 vis->mesa_visual.numAuxBuffers > 0 );
437
438 /* GLX_EXT_texture_from_pixmap */
439 b->TextureTarget = 0;
440 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
441 b->TextureMipmap = 0;
442
443 /* insert buffer into linked list */
444 b->Next = XMesaBufferList;
445 XMesaBufferList = b;
446
447 return b;
448 }
449
450
451 /**
452 * Find an XMesaBuffer by matching X display and colormap but NOT matching
453 * the notThis buffer.
454 */
455 XMesaBuffer
456 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
457 {
458 XMesaBuffer b;
459 for (b=XMesaBufferList; b; b=b->Next) {
460 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
461 return b;
462 }
463 }
464 return NULL;
465 }
466
467
468 /**
469 * Remove buffer from linked list, delete if no longer referenced.
470 */
471 static void
472 xmesa_free_buffer(XMesaBuffer buffer)
473 {
474 XMesaBuffer prev = NULL, b;
475
476 for (b = XMesaBufferList; b; b = b->Next) {
477 if (b == buffer) {
478 struct gl_framebuffer *fb = &buffer->mesa_buffer;
479
480 /* unlink buffer from list */
481 if (prev)
482 prev->Next = buffer->Next;
483 else
484 XMesaBufferList = buffer->Next;
485
486 /* mark as delete pending */
487 fb->DeletePending = GL_TRUE;
488
489 /* Since the X window for the XMesaBuffer is going away, we don't
490 * want to dereference this pointer in the future.
491 */
492 b->frontxrb->drawable = 0;
493
494 /* Unreference. If count = zero we'll really delete the buffer */
495 _mesa_reference_framebuffer(&fb, NULL);
496
497 return;
498 }
499 /* continue search */
500 prev = b;
501 }
502 /* buffer not found in XMesaBufferList */
503 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
504 }
505
506
507 /**
508 * Copy X color table stuff from one XMesaBuffer to another.
509 */
510 static void
511 copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
512 {
513 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table));
514 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r));
515 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g));
516 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b));
517 dst->num_alloced = src->num_alloced;
518 MEMCPY(dst->alloced_colors, src->alloced_colors,
519 sizeof(src->alloced_colors));
520 }
521
522
523
524 /**********************************************************************/
525 /***** Misc Private Functions *****/
526 /**********************************************************************/
527
528
529 /**
530 * A replacement for XAllocColor. This function should never
531 * fail to allocate a color. When XAllocColor fails, we return
532 * the nearest matching color. If we have to allocate many colors
533 * this function isn't too efficient; the XQueryColors() could be
534 * done just once.
535 * Written by Michael Pichler, Brian Paul, Mark Kilgard
536 * Input: dpy - X display
537 * cmap - X colormap
538 * cmapSize - size of colormap
539 * In/Out: color - the XColor struct
540 * Output: exact - 1=exact color match, 0=closest match
541 * alloced - 1=XAlloc worked, 0=XAlloc failed
542 */
543 static void
544 noFaultXAllocColor( int client,
545 XMesaDisplay *dpy,
546 XMesaColormap cmap,
547 int cmapSize,
548 XMesaColor *color,
549 int *exact, int *alloced )
550 {
551 #ifdef XFree86Server
552 Pixel *ppixIn;
553 xrgb *ctable;
554 #else
555 /* we'll try to cache ctable for better remote display performance */
556 static Display *prevDisplay = NULL;
557 static XMesaColormap prevCmap = 0;
558 static int prevCmapSize = 0;
559 static XMesaColor *ctable = NULL;
560 #endif
561 XMesaColor subColor;
562 int i, bestmatch;
563 double mindist; /* 3*2^16^2 exceeds long int precision. */
564
565 (void) client;
566
567 /* First try just using XAllocColor. */
568 #ifdef XFree86Server
569 if (AllocColor(cmap,
570 &color->red, &color->green, &color->blue,
571 &color->pixel,
572 client) == Success)
573 #else
574 if (XAllocColor(dpy, cmap, color))
575 #endif
576 {
577 *exact = 1;
578 *alloced = 1;
579 return;
580 }
581
582 /* Alloc failed, search for closest match */
583
584 /* Retrieve color table entries. */
585 /* XXX alloca candidate. */
586 #ifdef XFree86Server
587 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel));
588 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb));
589 for (i = 0; i < cmapSize; i++) {
590 ppixIn[i] = i;
591 }
592 QueryColors(cmap, cmapSize, ppixIn, ctable);
593 #else
594 if (prevDisplay != dpy || prevCmap != cmap
595 || prevCmapSize != cmapSize || !ctable) {
596 /* free previously cached color table */
597 if (ctable)
598 _mesa_free(ctable);
599 /* Get the color table from X */
600 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor));
601 assert(ctable);
602 for (i = 0; i < cmapSize; i++) {
603 ctable[i].pixel = i;
604 }
605 XQueryColors(dpy, cmap, ctable, cmapSize);
606 prevDisplay = dpy;
607 prevCmap = cmap;
608 prevCmapSize = cmapSize;
609 }
610 #endif
611
612 /* Find best match. */
613 bestmatch = -1;
614 mindist = 0.0;
615 for (i = 0; i < cmapSize; i++) {
616 double dr = 0.30 * ((double) color->red - (double) ctable[i].red);
617 double dg = 0.59 * ((double) color->green - (double) ctable[i].green);
618 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue);
619 double dist = dr * dr + dg * dg + db * db;
620 if (bestmatch < 0 || dist < mindist) {
621 bestmatch = i;
622 mindist = dist;
623 }
624 }
625
626 /* Return result. */
627 subColor.red = ctable[bestmatch].red;
628 subColor.green = ctable[bestmatch].green;
629 subColor.blue = ctable[bestmatch].blue;
630 /* Try to allocate the closest match color. This should only
631 * fail if the cell is read/write. Otherwise, we're incrementing
632 * the cell's reference count.
633 */
634 #ifdef XFree86Server
635 if (AllocColor(cmap,
636 &subColor.red, &subColor.green, &subColor.blue,
637 &subColor.pixel,
638 client) == Success) {
639 #else
640 if (XAllocColor(dpy, cmap, &subColor)) {
641 #endif
642 *alloced = 1;
643 }
644 else {
645 /* do this to work around a problem reported by Frank Ortega */
646 subColor.pixel = (unsigned long) bestmatch;
647 subColor.red = ctable[bestmatch].red;
648 subColor.green = ctable[bestmatch].green;
649 subColor.blue = ctable[bestmatch].blue;
650 subColor.flags = DoRed | DoGreen | DoBlue;
651 *alloced = 0;
652 }
653 #ifdef XFree86Server
654 _mesa_free(ppixIn);
655 _mesa_free(ctable);
656 #else
657 /* don't free table, save it for next time */
658 #endif
659
660 *color = subColor;
661 *exact = 0;
662 }
663
664
665
666 /**
667 * Do setup for PF_GRAYSCALE pixel format.
668 * Note that buffer may be NULL.
669 */
670 static GLboolean
671 setup_grayscale(int client, XMesaVisual v,
672 XMesaBuffer buffer, XMesaColormap cmap)
673 {
674 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
675 return GL_FALSE;
676 }
677
678 if (buffer) {
679 XMesaBuffer prevBuffer;
680
681 if (!cmap) {
682 return GL_FALSE;
683 }
684
685 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
686 if (prevBuffer &&
687 (buffer->xm_visual->mesa_visual.rgbMode ==
688 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
689 /* Copy colormap stuff from previous XMesaBuffer which uses same
690 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
691 */
692 copy_colortable_info(buffer, prevBuffer);
693 }
694 else {
695 /* Allocate 256 shades of gray */
696 int gray;
697 int colorsfailed = 0;
698 for (gray=0;gray<256;gray++) {
699 GLint r = gamma_adjust( v->RedGamma, gray, 255 );
700 GLint g = gamma_adjust( v->GreenGamma, gray, 255 );
701 GLint b = gamma_adjust( v->BlueGamma, gray, 255 );
702 int exact, alloced;
703 XMesaColor xcol;
704 xcol.red = (r << 8) | r;
705 xcol.green = (g << 8) | g;
706 xcol.blue = (b << 8) | b;
707 noFaultXAllocColor( client, v->display,
708 cmap, GET_COLORMAP_SIZE(v),
709 &xcol, &exact, &alloced );
710 if (!exact) {
711 colorsfailed++;
712 }
713 if (alloced) {
714 assert(buffer->num_alloced<256);
715 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
716 buffer->num_alloced++;
717 }
718
719 /*OLD
720 assert(gray < 576);
721 buffer->color_table[gray*3+0] = xcol.pixel;
722 buffer->color_table[gray*3+1] = xcol.pixel;
723 buffer->color_table[gray*3+2] = xcol.pixel;
724 assert(xcol.pixel < 65536);
725 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
726 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
727 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
728 */
729 buffer->color_table[gray] = xcol.pixel;
730 assert(xcol.pixel < 65536);
731 buffer->pixel_to_r[xcol.pixel] = gray;
732 buffer->pixel_to_g[xcol.pixel] = gray;
733 buffer->pixel_to_b[xcol.pixel] = gray;
734 }
735
736 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
737 _mesa_warning(NULL,
738 "Note: %d out of 256 needed colors do not match exactly.\n",
739 colorsfailed );
740 }
741 }
742 }
743
744 v->dithered_pf = PF_Grayscale;
745 v->undithered_pf = PF_Grayscale;
746 return GL_TRUE;
747 }
748
749
750
751 /**
752 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
753 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
754 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
755 * color. While this function was originally designed just for 8-bit
756 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
757 * Dithering code contributed by Bob Mercier.
758 */
759 static GLboolean
760 setup_dithered_color(int client, XMesaVisual v,
761 XMesaBuffer buffer, XMesaColormap cmap)
762 {
763 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
764 return GL_FALSE;
765 }
766
767 if (buffer) {
768 XMesaBuffer prevBuffer;
769
770 if (!cmap) {
771 return GL_FALSE;
772 }
773
774 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
775 if (prevBuffer &&
776 (buffer->xm_visual->mesa_visual.rgbMode ==
777 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
778 /* Copy colormap stuff from previous, matching XMesaBuffer.
779 * Do this to avoid time spent in noFaultXAllocColor.
780 */
781 copy_colortable_info(buffer, prevBuffer);
782 }
783 else {
784 /* Allocate X colors and initialize color_table[], red_table[], etc */
785 int r, g, b, i;
786 int colorsfailed = 0;
787 for (r = 0; r < DITH_R; r++) {
788 for (g = 0; g < DITH_G; g++) {
789 for (b = 0; b < DITH_B; b++) {
790 XMesaColor xcol;
791 int exact, alloced;
792 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535);
793 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535);
794 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535);
795 noFaultXAllocColor( client, v->display,
796 cmap, GET_COLORMAP_SIZE(v),
797 &xcol, &exact, &alloced );
798 if (!exact) {
799 colorsfailed++;
800 }
801 if (alloced) {
802 assert(buffer->num_alloced<256);
803 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
804 buffer->num_alloced++;
805 }
806 i = DITH_MIX( r, g, b );
807 assert(i < 576);
808 buffer->color_table[i] = xcol.pixel;
809 assert(xcol.pixel < 65536);
810 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1);
811 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1);
812 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1);
813 }
814 }
815 }
816
817 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
818 _mesa_warning(NULL,
819 "Note: %d out of %d needed colors do not match exactly.\n",
820 colorsfailed, DITH_R * DITH_G * DITH_B );
821 }
822 }
823 }
824
825 v->dithered_pf = PF_Dither;
826 v->undithered_pf = PF_Lookup;
827 return GL_TRUE;
828 }
829
830
831 /**
832 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
833 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
834 * Special dithering tables have to be initialized.
835 */
836 static void
837 setup_8bit_hpcr(XMesaVisual v)
838 {
839 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
840 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
841 * on the root window AND the colormap obtainable by XGetRGBColormaps
842 * for that atom must be set on the window. (see also tkInitWindow)
843 * If that colormap is not set, the output will look stripy.
844 */
845
846 /* Setup color tables with gamma correction */
847 int i;
848 double g;
849
850 g = 1.0 / v->RedGamma;
851 for (i=0; i<256; i++) {
852 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g ));
853 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 );
854 }
855
856 g = 1.0 / v->GreenGamma;
857 for (i=0; i<256; i++) {
858 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g ));
859 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 );
860 }
861
862 g = 1.0 / v->BlueGamma;
863 for (i=0; i<256; i++) {
864 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g ));
865 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 );
866 }
867 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */
868 v->dithered_pf = PF_HPCR;
869
870 /* which method should I use to clear */
871 /* GL_FALSE: keep the ordinary method */
872 /* GL_TRUE : clear with dither pattern */
873 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE;
874
875 if (v->hpcr_clear_flag) {
876 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display,
877 DefaultRootWindow(v->display),
878 16, 2, 8);
879 #ifndef XFree86Server
880 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap,
881 0, 0, 16, 2, AllPlanes, ZPixmap);
882 #endif
883 }
884 }
885
886
887 /**
888 * Setup RGB rendering for a window with a True/DirectColor visual.
889 */
890 static void
891 setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
892 {
893 unsigned long rmask, gmask, bmask;
894 (void) buffer;
895 (void) cmap;
896
897 /* Compute red multiplier (mask) and bit shift */
898 v->rshift = 0;
899 rmask = GET_REDMASK(v);
900 while ((rmask & 1)==0) {
901 v->rshift++;
902 rmask = rmask >> 1;
903 }
904
905 /* Compute green multiplier (mask) and bit shift */
906 v->gshift = 0;
907 gmask = GET_GREENMASK(v);
908 while ((gmask & 1)==0) {
909 v->gshift++;
910 gmask = gmask >> 1;
911 }
912
913 /* Compute blue multiplier (mask) and bit shift */
914 v->bshift = 0;
915 bmask = GET_BLUEMASK(v);
916 while ((bmask & 1)==0) {
917 v->bshift++;
918 bmask = bmask >> 1;
919 }
920
921 /*
922 * Compute component-to-pixel lookup tables and dithering kernel
923 */
924 {
925 static GLubyte kernel[16] = {
926 0*16, 8*16, 2*16, 10*16,
927 12*16, 4*16, 14*16, 6*16,
928 3*16, 11*16, 1*16, 9*16,
929 15*16, 7*16, 13*16, 5*16,
930 };
931 GLint rBits = _mesa_bitcount(rmask);
932 GLint gBits = _mesa_bitcount(gmask);
933 GLint bBits = _mesa_bitcount(bmask);
934 GLint maxBits;
935 GLuint i;
936
937 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
938 for (i=0; i<=rmask; i++)
939 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
940 for (i=0; i<=gmask; i++)
941 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
942 for (i=0; i<=bmask; i++)
943 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
944
945 /* convert RGB values from [0,255] to pixel components */
946
947 for (i=0;i<256;i++) {
948 GLint r = gamma_adjust(v->RedGamma, i, 255);
949 GLint g = gamma_adjust(v->GreenGamma, i, 255);
950 GLint b = gamma_adjust(v->BlueGamma, i, 255);
951 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
952 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
953 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
954 }
955 /* overflow protection */
956 for (i=256;i<512;i++) {
957 v->RtoPixel[i] = v->RtoPixel[255];
958 v->GtoPixel[i] = v->GtoPixel[255];
959 v->BtoPixel[i] = v->BtoPixel[255];
960 }
961
962 /* setup dithering kernel */
963 maxBits = rBits;
964 if (gBits > maxBits) maxBits = gBits;
965 if (bBits > maxBits) maxBits = bBits;
966 for (i=0;i<16;i++) {
967 v->Kernel[i] = kernel[i] >> maxBits;
968 }
969
970 v->undithered_pf = PF_Truecolor;
971 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
972 }
973
974 /*
975 * Now check for TrueColor visuals which we can optimize.
976 */
977 if ( GET_REDMASK(v) ==0x0000ff
978 && GET_GREENMASK(v)==0x00ff00
979 && GET_BLUEMASK(v) ==0xff0000
980 && CHECK_BYTE_ORDER(v)
981 && v->BitsPerPixel==32
982 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
983 /* common 32 bpp config used on SGI, Sun */
984 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
985 }
986 else if (GET_REDMASK(v) == 0xff0000
987 && GET_GREENMASK(v)== 0x00ff00
988 && GET_BLUEMASK(v) == 0x0000ff
989 && CHECK_BYTE_ORDER(v)
990 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
991 if (v->BitsPerPixel==32) {
992 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
993 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
994 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
995 else
996 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
997 }
998 else if (v->BitsPerPixel == 24) {
999 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
1000 }
1001 }
1002 else if (GET_REDMASK(v) ==0xf800
1003 && GET_GREENMASK(v)==0x07e0
1004 && GET_BLUEMASK(v) ==0x001f
1005 && CHECK_BYTE_ORDER(v)
1006 && v->BitsPerPixel==16
1007 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1008 /* 5-6-5 RGB */
1009 v->undithered_pf = PF_5R6G5B;
1010 v->dithered_pf = PF_Dither_5R6G5B;
1011 }
1012 else if (GET_REDMASK(v) ==0xe0
1013 && GET_GREENMASK(v)==0x1c
1014 && GET_BLUEMASK(v) ==0x03
1015 && CHECK_FOR_HPCR(v)) {
1016 /* 8-bit HP color recovery */
1017 setup_8bit_hpcr( v );
1018 }
1019 }
1020
1021
1022
1023 /**
1024 * Setup RGB rendering for a window with a monochrome visual.
1025 */
1026 static void
1027 setup_monochrome( XMesaVisual v, XMesaBuffer b )
1028 {
1029 (void) b;
1030 v->dithered_pf = v->undithered_pf = PF_1Bit;
1031 /* if black=1 then we must flip pixel values */
1032 v->bitFlip = (GET_BLACK_PIXEL(v) != 0);
1033 }
1034
1035
1036
1037 /**
1038 * When a context is bound for the first time, we can finally finish
1039 * initializing the context's visual and buffer information.
1040 * \param v the XMesaVisual to initialize
1041 * \param b the XMesaBuffer to initialize (may be NULL)
1042 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1043 * \param window the window/pixmap we're rendering into
1044 * \param cmap the colormap associated with the window/pixmap
1045 * \return GL_TRUE=success, GL_FALSE=failure
1046 */
1047 static GLboolean
1048 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
1049 GLboolean rgb_flag, XMesaDrawable window,
1050 XMesaColormap cmap)
1051 {
1052 int client = 0;
1053
1054 #ifdef XFree86Server
1055 client = (window) ? CLIENT_ID(window->id) : 0;
1056 #endif
1057
1058 ASSERT(!b || b->xm_visual == v);
1059
1060 /* Save true bits/pixel */
1061 v->BitsPerPixel = bits_per_pixel(v);
1062 assert(v->BitsPerPixel > 0);
1063
1064 if (rgb_flag == GL_FALSE) {
1065 /* COLOR-INDEXED WINDOW:
1066 * Even if the visual is TrueColor or DirectColor we treat it as
1067 * being color indexed. This is weird but might be useful to someone.
1068 */
1069 v->dithered_pf = v->undithered_pf = PF_Index;
1070 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v);
1071 }
1072 else {
1073 /* RGB WINDOW:
1074 * We support RGB rendering into almost any kind of visual.
1075 */
1076 const int xclass = v->mesa_visual.visualType;
1077 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1078 setup_truecolor( v, b, cmap );
1079 }
1080 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) {
1081 setup_monochrome( v, b );
1082 }
1083 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) {
1084 if (!setup_grayscale( client, v, b, cmap )) {
1085 return GL_FALSE;
1086 }
1087 }
1088 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR)
1089 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) {
1090 if (!setup_dithered_color( client, v, b, cmap )) {
1091 return GL_FALSE;
1092 }
1093 }
1094 else {
1095 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
1096 return GL_FALSE;
1097 }
1098 v->mesa_visual.indexBits = 0;
1099
1100 if (_mesa_getenv("MESA_NO_DITHER")) {
1101 v->dithered_pf = v->undithered_pf;
1102 }
1103 }
1104
1105
1106 /*
1107 * If MESA_INFO env var is set print out some debugging info
1108 * which can help Brian figure out what's going on when a user
1109 * reports bugs.
1110 */
1111 if (_mesa_getenv("MESA_INFO")) {
1112 _mesa_printf("X/Mesa visual = %p\n", (void *) v);
1113 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
1114 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
1115 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level);
1116 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
1117 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
1118 }
1119
1120 if (b && window) {
1121 char *data;
1122
1123 /* Do window-specific initializations */
1124
1125 /* these should have been set in create_xmesa_buffer */
1126 ASSERT(b->frontxrb->drawable == window);
1127 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
1128
1129 /* Setup for single/double buffering */
1130 if (v->mesa_visual.doubleBufferMode) {
1131 /* Double buffered */
1132 b->shm = check_for_xshm( v->display );
1133 }
1134
1135 /* X11 graphics contexts */
1136 #ifdef XFree86Server
1137 b->gc = CreateScratchGC(v->display, window->depth);
1138 #else
1139 b->gc = XCreateGC( v->display, window, 0, NULL );
1140 #endif
1141 XMesaSetFunction( v->display, b->gc, GXcopy );
1142
1143 /* cleargc - for glClear() */
1144 #ifdef XFree86Server
1145 b->cleargc = CreateScratchGC(v->display, window->depth);
1146 #else
1147 b->cleargc = XCreateGC( v->display, window, 0, NULL );
1148 #endif
1149 XMesaSetFunction( v->display, b->cleargc, GXcopy );
1150
1151 /*
1152 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1153 * Patch contributed by Michael Pichler May 15, 1995.
1154 */
1155 #ifdef XFree86Server
1156 b->swapgc = CreateScratchGC(v->display, window->depth);
1157 {
1158 CARD32 v[1];
1159 v[0] = FALSE;
1160 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL);
1161 }
1162 #else
1163 {
1164 XGCValues gcvalues;
1165 gcvalues.graphics_exposures = False;
1166 b->swapgc = XCreateGC(v->display, window,
1167 GCGraphicsExposures, &gcvalues);
1168 }
1169 #endif
1170 XMesaSetFunction( v->display, b->swapgc, GXcopy );
1171 /*
1172 * Set fill style and tile pixmap once for all for HPCR stuff
1173 * (instead of doing it each time in clear_color_HPCR_pixmap())
1174 * Initialize whole stuff
1175 * Patch contributed by Jacques Leroy March 8, 1998.
1176 */
1177 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) {
1178 int i;
1179 for (i = 0; i < 16; i++) {
1180 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0);
1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0);
1182 }
1183 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap,
1184 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2);
1185 XMesaSetFillStyle( v->display, b->cleargc, FillTiled);
1186 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap );
1187 }
1188
1189 /* Initialize the row buffer XImage for use in write_color_span() */
1190 data = (char*) MALLOC(MAX_WIDTH*4);
1191 #ifdef XFree86Server
1192 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data);
1193 #else
1194 b->rowimage = XCreateImage( v->display,
1195 v->visinfo->visual,
1196 v->visinfo->depth,
1197 ZPixmap, 0, /*format, offset*/
1198 data, /*data*/
1199 MAX_WIDTH, 1, /*width, height*/
1200 32, /*bitmap_pad*/
1201 0 /*bytes_per_line*/ );
1202 #endif
1203 if (!b->rowimage)
1204 return GL_FALSE;
1205 }
1206
1207 return GL_TRUE;
1208 }
1209
1210
1211
1212 /*
1213 * Convert an RGBA color to a pixel value.
1214 */
1215 unsigned long
1216 xmesa_color_to_pixel(GLcontext *ctx,
1217 GLubyte r, GLubyte g, GLubyte b, GLubyte a,
1218 GLuint pixelFormat)
1219 {
1220 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1221 switch (pixelFormat) {
1222 case PF_Index:
1223 return 0;
1224 case PF_Truecolor:
1225 {
1226 unsigned long p;
1227 PACK_TRUECOLOR( p, r, g, b );
1228 return p;
1229 }
1230 case PF_8A8B8G8R:
1231 return PACK_8A8B8G8R( r, g, b, a );
1232 case PF_8A8R8G8B:
1233 return PACK_8A8R8G8B( r, g, b, a );
1234 case PF_8R8G8B:
1235 /* fall through */
1236 case PF_8R8G8B24:
1237 return PACK_8R8G8B( r, g, b );
1238 case PF_5R6G5B:
1239 return PACK_5R6G5B( r, g, b );
1240 case PF_Dither:
1241 {
1242 DITHER_SETUP;
1243 return DITHER( 1, 0, r, g, b );
1244 }
1245 case PF_1Bit:
1246 /* 382 = (3*255)/2 */
1247 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
1248 case PF_HPCR:
1249 return DITHER_HPCR(1, 1, r, g, b);
1250 case PF_Lookup:
1251 {
1252 LOOKUP_SETUP;
1253 return LOOKUP( r, g, b );
1254 }
1255 case PF_Grayscale:
1256 return GRAY_RGB( r, g, b );
1257 case PF_Dither_True:
1258 /* fall through */
1259 case PF_Dither_5R6G5B:
1260 {
1261 unsigned long p;
1262 PACK_TRUEDITHER(p, 1, 0, r, g, b);
1263 return p;
1264 }
1265 default:
1266 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
1267 }
1268 return 0;
1269 }
1270
1271
1272 #define NUM_VISUAL_TYPES 6
1273
1274 /**
1275 * Convert an X visual type to a GLX visual type.
1276 *
1277 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1278 * to be converted.
1279 * \return If \c visualType is a valid X visual type, a GLX visual type will
1280 * be returned. Otherwise \c GLX_NONE will be returned.
1281 *
1282 * \note
1283 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1284 * DRI CVS tree.
1285 */
1286 static GLint
1287 xmesa_convert_from_x_visual_type( int visualType )
1288 {
1289 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
1290 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
1291 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
1292 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
1293 };
1294
1295 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
1296 ? glx_visual_types[ visualType ] : GLX_NONE;
1297 }
1298
1299
1300 /**********************************************************************/
1301 /***** Public Functions *****/
1302 /**********************************************************************/
1303
1304
1305 #ifdef IN_DRI_DRIVER
1306 #define need_GL_VERSION_1_3
1307 #define need_GL_VERSION_1_4
1308 #define need_GL_VERSION_1_5
1309 #define need_GL_VERSION_2_0
1310
1311 /* sw extensions for imaging */
1312 #define need_GL_EXT_blend_color
1313 #define need_GL_EXT_blend_minmax
1314 #define need_GL_EXT_convolution
1315 #define need_GL_EXT_histogram
1316 #define need_GL_SGI_color_table
1317
1318 /* sw extensions not associated with some GL version */
1319 #define need_GL_ARB_shader_objects
1320 #define need_GL_ARB_vertex_program
1321 #define need_GL_APPLE_vertex_array_object
1322 #define need_GL_ATI_fragment_shader
1323 #define need_GL_EXT_depth_bounds_test
1324 #define need_GL_EXT_framebuffer_object
1325 #define need_GL_EXT_framebuffer_blit
1326 #define need_GL_EXT_gpu_program_parameters
1327 #define need_GL_EXT_paletted_texture
1328 #define need_GL_MESA_resize_buffers
1329 #define need_GL_NV_vertex_program
1330 #define need_GL_NV_fragment_program
1331
1332 #include "extension_helper.h"
1333 #include "utils.h"
1334
1335 const struct dri_extension card_extensions[] =
1336 {
1337 { "GL_VERSION_1_3", GL_VERSION_1_3_functions },
1338 { "GL_VERSION_1_4", GL_VERSION_1_4_functions },
1339 { "GL_VERSION_1_5", GL_VERSION_1_5_functions },
1340 { "GL_VERSION_2_0", GL_VERSION_2_0_functions },
1341
1342 { "GL_EXT_blend_color", GL_EXT_blend_color_functions },
1343 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions },
1344 { "GL_EXT_convolution", GL_EXT_convolution_functions },
1345 { "GL_EXT_histogram", GL_EXT_histogram_functions },
1346 { "GL_SGI_color_table", GL_SGI_color_table_functions },
1347
1348 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
1349 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
1350 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
1351 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
1352 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
1353 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
1354 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
1355 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
1356 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
1357 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
1358 { "GL_NV_vertex_program", GL_NV_vertex_program_functions },
1359 { "GL_NV_fragment_program", GL_NV_fragment_program_functions },
1360 { NULL, NULL }
1361 };
1362 #endif
1363
1364 /*
1365 * Create a new X/Mesa visual.
1366 * Input: display - X11 display
1367 * visinfo - an XVisualInfo pointer
1368 * rgb_flag - GL_TRUE = RGB mode,
1369 * GL_FALSE = color index mode
1370 * alpha_flag - alpha buffer requested?
1371 * db_flag - GL_TRUE = double-buffered,
1372 * GL_FALSE = single buffered
1373 * stereo_flag - stereo visual?
1374 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1375 * GL_FALSE = use an off-screen pixmap for back buffer
1376 * depth_size - requested bits/depth values, or zero
1377 * stencil_size - requested bits/stencil values, or zero
1378 * accum_red_size - requested bits/red accum values, or zero
1379 * accum_green_size - requested bits/green accum values, or zero
1380 * accum_blue_size - requested bits/blue accum values, or zero
1381 * accum_alpha_size - requested bits/alpha accum values, or zero
1382 * num_samples - number of samples/pixel if multisampling, or zero
1383 * level - visual level, usually 0
1384 * visualCaveat - ala the GLX extension, usually GLX_NONE
1385 * Return; a new XMesaVisual or 0 if error.
1386 */
1387 PUBLIC
1388 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1389 XMesaVisualInfo visinfo,
1390 GLboolean rgb_flag,
1391 GLboolean alpha_flag,
1392 GLboolean db_flag,
1393 GLboolean stereo_flag,
1394 GLboolean ximage_flag,
1395 GLint depth_size,
1396 GLint stencil_size,
1397 GLint accum_red_size,
1398 GLint accum_green_size,
1399 GLint accum_blue_size,
1400 GLint accum_alpha_size,
1401 GLint num_samples,
1402 GLint level,
1403 GLint visualCaveat )
1404 {
1405 char *gamma;
1406 XMesaVisual v;
1407 GLint red_bits, green_bits, blue_bits, alpha_bits;
1408
1409 #ifdef IN_DRI_DRIVER
1410 /* driInitExtensions() should be called once per screen to setup extension
1411 * indices. There is no need to call it when the context is created since
1412 * XMesa enables mesa sw extensions on its own.
1413 */
1414 driInitExtensions( NULL, card_extensions, GL_FALSE );
1415 #endif
1416
1417 #ifndef XFree86Server
1418 /* For debugging only */
1419 if (_mesa_getenv("MESA_XSYNC")) {
1420 /* This makes debugging X easier.
1421 * In your debugger, set a breakpoint on _XError to stop when an
1422 * X protocol error is generated.
1423 */
1424 XSynchronize( display, 1 );
1425 }
1426 #endif
1427
1428 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1429 if (!v) {
1430 return NULL;
1431 }
1432
1433 v->display = display;
1434
1435 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1436 * the struct but we may need some of the information contained in it
1437 * at a later time.
1438 */
1439 #ifndef XFree86Server
1440 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1441 if(!v->visinfo) {
1442 _mesa_free(v);
1443 return NULL;
1444 }
1445 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1446 #endif
1447
1448 /* check for MESA_GAMMA environment variable */
1449 gamma = _mesa_getenv("MESA_GAMMA");
1450 if (gamma) {
1451 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1452 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1453 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1454 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1455 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1456 }
1457 else {
1458 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1459 }
1460
1461 v->ximage_flag = ximage_flag;
1462
1463 #ifdef XFree86Server
1464 /* We could calculate these values by ourselves. nplanes is either the sum
1465 * of the red, green, and blue bits or the number index bits.
1466 * ColormapEntries is either (1U << index_bits) or
1467 * (1U << max(redBits, greenBits, blueBits)).
1468 */
1469 assert(visinfo->nplanes > 0);
1470 v->nplanes = visinfo->nplanes;
1471 v->ColormapEntries = visinfo->ColormapEntries;
1472
1473 v->mesa_visual.redMask = visinfo->redMask;
1474 v->mesa_visual.greenMask = visinfo->greenMask;
1475 v->mesa_visual.blueMask = visinfo->blueMask;
1476 v->mesa_visual.visualID = visinfo->vid;
1477 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */
1478 #else
1479 v->mesa_visual.redMask = visinfo->red_mask;
1480 v->mesa_visual.greenMask = visinfo->green_mask;
1481 v->mesa_visual.blueMask = visinfo->blue_mask;
1482 v->mesa_visual.visualID = visinfo->visualid;
1483 v->mesa_visual.screen = visinfo->screen;
1484 #endif
1485
1486 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1487 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
1488 #else
1489 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
1490 #endif
1491
1492 v->mesa_visual.visualRating = visualCaveat;
1493
1494 if (alpha_flag)
1495 v->mesa_visual.alphaBits = 8;
1496
1497 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
1498
1499 {
1500 const int xclass = v->mesa_visual.visualType;
1501 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1502 red_bits = _mesa_bitcount(GET_REDMASK(v));
1503 green_bits = _mesa_bitcount(GET_GREENMASK(v));
1504 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
1505 }
1506 else {
1507 /* this is an approximation */
1508 int depth;
1509 depth = GET_VISUAL_DEPTH(v);
1510 red_bits = depth / 3;
1511 depth -= red_bits;
1512 green_bits = depth / 2;
1513 depth -= green_bits;
1514 blue_bits = depth;
1515 alpha_bits = 0;
1516 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1517 }
1518 alpha_bits = v->mesa_visual.alphaBits;
1519 }
1520
1521 _mesa_initialize_visual( &v->mesa_visual,
1522 rgb_flag, db_flag, stereo_flag,
1523 red_bits, green_bits,
1524 blue_bits, alpha_bits,
1525 v->mesa_visual.indexBits,
1526 depth_size,
1527 stencil_size,
1528 accum_red_size, accum_green_size,
1529 accum_blue_size, accum_alpha_size,
1530 0 );
1531
1532 /* XXX minor hack */
1533 v->mesa_visual.level = level;
1534 return v;
1535 }
1536
1537
1538 PUBLIC
1539 void XMesaDestroyVisual( XMesaVisual v )
1540 {
1541 #ifndef XFree86Server
1542 _mesa_free(v->visinfo);
1543 #endif
1544 _mesa_free(v);
1545 }
1546
1547
1548
1549 /**
1550 * Create a new XMesaContext.
1551 * \param v the XMesaVisual
1552 * \param share_list another XMesaContext with which to share display
1553 * lists or NULL if no sharing is wanted.
1554 * \return an XMesaContext or NULL if error.
1555 */
1556 PUBLIC
1557 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1558 {
1559 static GLboolean firstTime = GL_TRUE;
1560 XMesaContext c;
1561 GLcontext *mesaCtx;
1562 struct dd_function_table functions;
1563 TNLcontext *tnl;
1564
1565 if (firstTime) {
1566 _glthread_INIT_MUTEX(_xmesa_lock);
1567 firstTime = GL_FALSE;
1568 }
1569
1570 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1571 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1572 if (!c)
1573 return NULL;
1574
1575 mesaCtx = &(c->mesa);
1576
1577 /* initialize with default driver functions, then plug in XMesa funcs */
1578 _mesa_init_driver_functions(&functions);
1579 xmesa_init_driver_functions(v, &functions);
1580 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
1581 share_list ? &(share_list->mesa) : (GLcontext *) NULL,
1582 &functions, (void *) c)) {
1583 _mesa_free(c);
1584 return NULL;
1585 }
1586
1587 _mesa_enable_sw_extensions(mesaCtx);
1588 _mesa_enable_1_3_extensions(mesaCtx);
1589 _mesa_enable_1_4_extensions(mesaCtx);
1590 _mesa_enable_1_5_extensions(mesaCtx);
1591 _mesa_enable_2_0_extensions(mesaCtx);
1592 _mesa_enable_2_1_extensions(mesaCtx);
1593 #if ENABLE_EXT_texure_compression_s3tc
1594 if (mesaCtx->Mesa_DXTn) {
1595 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
1596 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
1597 }
1598 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
1599 #endif
1600 #if ENABLE_EXT_timer_query
1601 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
1602 #endif
1603
1604 #ifdef XFree86Server
1605 /* If we're running in the X server, do bounds checking to prevent
1606 * segfaults and server crashes!
1607 */
1608 mesaCtx->Const.CheckArrayBounds = GL_TRUE;
1609 #endif
1610
1611 /* finish up xmesa context initializations */
1612 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
1613 c->xm_visual = v;
1614 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1615 c->display = v->display;
1616 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1617
1618 /* Initialize the software rasterizer and helper modules.
1619 */
1620 if (!_swrast_CreateContext( mesaCtx ) ||
1621 !_vbo_CreateContext( mesaCtx ) ||
1622 !_tnl_CreateContext( mesaCtx ) ||
1623 !_swsetup_CreateContext( mesaCtx )) {
1624 _mesa_free_context_data(&c->mesa);
1625 _mesa_free(c);
1626 return NULL;
1627 }
1628
1629 /* tnl setup */
1630 tnl = TNL_CONTEXT(mesaCtx);
1631 tnl->Driver.RunPipeline = _tnl_run_pipeline;
1632 /* swrast setup */
1633 xmesa_register_swrast_functions( mesaCtx );
1634 _swsetup_Wakeup(mesaCtx);
1635
1636 return c;
1637 }
1638
1639
1640
1641 PUBLIC
1642 void XMesaDestroyContext( XMesaContext c )
1643 {
1644 GLcontext *mesaCtx = &c->mesa;
1645
1646 #ifdef FX
1647 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) );
1648 #endif
1649
1650 _swsetup_DestroyContext( mesaCtx );
1651 _swrast_DestroyContext( mesaCtx );
1652 _tnl_DestroyContext( mesaCtx );
1653 _vbo_DestroyContext( mesaCtx );
1654 _mesa_free_context_data( mesaCtx );
1655 _mesa_free( c );
1656 }
1657
1658
1659
1660 /**
1661 * Private function for creating an XMesaBuffer which corresponds to an
1662 * X window or pixmap.
1663 * \param v the window's XMesaVisual
1664 * \param w the window we're wrapping
1665 * \return new XMesaBuffer or NULL if error
1666 */
1667 PUBLIC XMesaBuffer
1668 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
1669 {
1670 #ifndef XFree86Server
1671 XWindowAttributes attr;
1672 #endif
1673 XMesaBuffer b;
1674 XMesaColormap cmap;
1675 int depth;
1676
1677 assert(v);
1678 assert(w);
1679
1680 /* Check that window depth matches visual depth */
1681 #ifdef XFree86Server
1682 depth = ((XMesaDrawable)w)->depth;
1683 #else
1684 XGetWindowAttributes( v->display, w, &attr );
1685 depth = attr.depth;
1686 #endif
1687 if (GET_VISUAL_DEPTH(v) != depth) {
1688 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1689 GET_VISUAL_DEPTH(v), depth);
1690 return NULL;
1691 }
1692
1693 /* Find colormap */
1694 #ifdef XFree86Server
1695 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1696 #else
1697 if (attr.colormap) {
1698 cmap = attr.colormap;
1699 }
1700 else {
1701 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1702 /* this is weird, a window w/out a colormap!? */
1703 /* OK, let's just allocate a new one and hope for the best */
1704 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1705 }
1706 #endif
1707
1708 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1709 if (!b)
1710 return NULL;
1711
1712 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1713 (XMesaDrawable) w, cmap )) {
1714 xmesa_free_buffer(b);
1715 return NULL;
1716 }
1717
1718 return b;
1719 }
1720
1721
1722
1723 /**
1724 * Create a new XMesaBuffer from an X pixmap.
1725 *
1726 * \param v the XMesaVisual
1727 * \param p the pixmap
1728 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1729 * \c GLX_DIRECT_COLOR visual for the pixmap
1730 * \returns new XMesaBuffer or NULL if error
1731 */
1732 PUBLIC XMesaBuffer
1733 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1734 {
1735 XMesaBuffer b;
1736
1737 assert(v);
1738
1739 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1740 if (!b)
1741 return NULL;
1742
1743 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1744 (XMesaDrawable) p, cmap)) {
1745 xmesa_free_buffer(b);
1746 return NULL;
1747 }
1748
1749 return b;
1750 }
1751
1752
1753 /**
1754 * For GLX_EXT_texture_from_pixmap
1755 */
1756 XMesaBuffer
1757 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1758 XMesaColormap cmap,
1759 int format, int target, int mipmap)
1760 {
1761 GET_CURRENT_CONTEXT(ctx);
1762 XMesaBuffer b;
1763 GLuint width, height;
1764
1765 assert(v);
1766
1767 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1768 if (!b)
1769 return NULL;
1770
1771 /* get pixmap size, update framebuffer/renderbuffer dims */
1772 xmesa_get_window_size(v->display, b, &width, &height);
1773 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1774
1775 if (target == 0) {
1776 /* examine dims */
1777 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1778 target = GLX_TEXTURE_2D_EXT;
1779 }
1780 else if ( _mesa_bitcount(width) == 1
1781 && _mesa_bitcount(height) == 1) {
1782 /* power of two size */
1783 if (height == 1) {
1784 target = GLX_TEXTURE_1D_EXT;
1785 }
1786 else {
1787 target = GLX_TEXTURE_2D_EXT;
1788 }
1789 }
1790 else if (ctx->Extensions.NV_texture_rectangle) {
1791 target = GLX_TEXTURE_RECTANGLE_EXT;
1792 }
1793 else {
1794 /* non power of two textures not supported */
1795 XMesaDestroyBuffer(b);
1796 return 0;
1797 }
1798 }
1799
1800 b->TextureTarget = target;
1801 b->TextureFormat = format;
1802 b->TextureMipmap = mipmap;
1803
1804 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1805 (XMesaDrawable) p, cmap)) {
1806 xmesa_free_buffer(b);
1807 return NULL;
1808 }
1809
1810 return b;
1811 }
1812
1813
1814
1815 XMesaBuffer
1816 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1817 unsigned int width, unsigned int height)
1818 {
1819 #ifndef XFree86Server
1820 XMesaWindow root;
1821 XMesaDrawable drawable; /* X Pixmap Drawable */
1822 XMesaBuffer b;
1823
1824 /* allocate pixmap for front buffer */
1825 root = RootWindow( v->display, v->visinfo->screen );
1826 drawable = XCreatePixmap(v->display, root, width, height,
1827 v->visinfo->depth);
1828 if (!drawable)
1829 return NULL;
1830
1831 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1832 if (!b)
1833 return NULL;
1834
1835 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1836 drawable, cmap)) {
1837 xmesa_free_buffer(b);
1838 return NULL;
1839 }
1840
1841 return b;
1842 #else
1843 return 0;
1844 #endif
1845 }
1846
1847
1848
1849 /*
1850 * Deallocate an XMesaBuffer structure and all related info.
1851 */
1852 PUBLIC void
1853 XMesaDestroyBuffer(XMesaBuffer b)
1854 {
1855 xmesa_free_buffer(b);
1856 }
1857
1858
1859 /**
1860 * Query the current window size and update the corresponding GLframebuffer
1861 * and all attached renderbuffers.
1862 * Called when:
1863 * 1. the first time a buffer is bound to a context.
1864 * 2. from glViewport to poll for window size changes
1865 * 3. from the XMesaResizeBuffers() API function.
1866 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1867 * when resizing a buffer when no rendering context is bound.
1868 */
1869 void
1870 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1871 {
1872 GLuint width, height;
1873 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1874 if (drawBuffer->mesa_buffer.Width != width ||
1875 drawBuffer->mesa_buffer.Height != height) {
1876 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
1877 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1878 }
1879 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1880 }
1881
1882
1883 /*
1884 * Bind buffer b to context c and make c the current rendering context.
1885 */
1886 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1887 {
1888 return XMesaMakeCurrent2( c, b, b );
1889 }
1890
1891
1892 /*
1893 * Bind buffer b to context c and make c the current rendering context.
1894 */
1895 PUBLIC
1896 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1897 XMesaBuffer readBuffer )
1898 {
1899 if (c) {
1900 if (!drawBuffer || !readBuffer)
1901 return GL_FALSE; /* must specify buffers! */
1902
1903 if (&(c->mesa) == _mesa_get_current_context()
1904 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1905 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1906 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1907 /* same context and buffer, do nothing */
1908 return GL_TRUE;
1909 }
1910
1911 c->xm_buffer = drawBuffer;
1912
1913 #ifdef FX
1914 if (FXmakeCurrent( drawBuffer ))
1915 return GL_TRUE;
1916 #endif
1917
1918 /* Call this periodically to detect when the user has begun using
1919 * GL rendering from multiple threads.
1920 */
1921 _glapi_check_multithread();
1922
1923 xmesa_check_and_update_buffer_size(c, drawBuffer);
1924 if (readBuffer != drawBuffer)
1925 xmesa_check_and_update_buffer_size(c, readBuffer);
1926
1927 _mesa_make_current(&(c->mesa),
1928 &drawBuffer->mesa_buffer,
1929 &readBuffer->mesa_buffer);
1930
1931 if (c->xm_visual->mesa_visual.rgbMode) {
1932 /*
1933 * Must recompute and set these pixel values because colormap
1934 * can be different for different windows.
1935 */
1936 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1937 c->clearcolor[0],
1938 c->clearcolor[1],
1939 c->clearcolor[2],
1940 c->clearcolor[3],
1941 c->xm_visual->undithered_pf);
1942 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1943 }
1944
1945 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1946 drawBuffer->wasCurrent = GL_TRUE;
1947 }
1948 else {
1949 /* Detach */
1950 _mesa_make_current( NULL, NULL, NULL );
1951 }
1952 return GL_TRUE;
1953 }
1954
1955
1956 /*
1957 * Unbind the context c from its buffer.
1958 */
1959 GLboolean XMesaUnbindContext( XMesaContext c )
1960 {
1961 /* A no-op for XFree86 integration purposes */
1962 return GL_TRUE;
1963 }
1964
1965
1966 XMesaContext XMesaGetCurrentContext( void )
1967 {
1968 GET_CURRENT_CONTEXT(ctx);
1969 if (ctx) {
1970 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1971 return xmesa;
1972 }
1973 else {
1974 return 0;
1975 }
1976 }
1977
1978
1979 XMesaBuffer XMesaGetCurrentBuffer( void )
1980 {
1981 GET_CURRENT_CONTEXT(ctx);
1982 if (ctx) {
1983 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
1984 return xmbuf;
1985 }
1986 else {
1987 return 0;
1988 }
1989 }
1990
1991
1992 /* New in Mesa 3.1 */
1993 XMesaBuffer XMesaGetCurrentReadBuffer( void )
1994 {
1995 GET_CURRENT_CONTEXT(ctx);
1996 if (ctx) {
1997 return XMESA_BUFFER(ctx->ReadBuffer);
1998 }
1999 else {
2000 return 0;
2001 }
2002 }
2003
2004
2005 #ifdef XFree86Server
2006 PUBLIC
2007 GLboolean XMesaForceCurrent(XMesaContext c)
2008 {
2009 if (c) {
2010 _glapi_set_dispatch(c->mesa.CurrentDispatch);
2011
2012 if (&(c->mesa) != _mesa_get_current_context()) {
2013 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer);
2014 }
2015 }
2016 else {
2017 _mesa_make_current(NULL, NULL, NULL);
2018 }
2019 return GL_TRUE;
2020 }
2021
2022
2023 PUBLIC
2024 GLboolean XMesaLoseCurrent(XMesaContext c)
2025 {
2026 (void) c;
2027 _mesa_make_current(NULL, NULL, NULL);
2028 return GL_TRUE;
2029 }
2030
2031
2032 PUBLIC
2033 GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask )
2034 {
2035 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
2036 return GL_TRUE;
2037 }
2038 #endif /* XFree86Server */
2039
2040
2041 #ifndef FX
2042 GLboolean XMesaSetFXmode( GLint mode )
2043 {
2044 (void) mode;
2045 return GL_FALSE;
2046 }
2047 #endif
2048
2049
2050
2051 /*
2052 * Copy the back buffer to the front buffer. If there's no back buffer
2053 * this is a no-op.
2054 */
2055 PUBLIC
2056 void XMesaSwapBuffers( XMesaBuffer b )
2057 {
2058 GET_CURRENT_CONTEXT(ctx);
2059
2060 if (!b->backxrb) {
2061 /* single buffered */
2062 return;
2063 }
2064
2065 /* If we're swapping the buffer associated with the current context
2066 * we have to flush any pending rendering commands first.
2067 */
2068 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2069 _mesa_notifySwapBuffers(ctx);
2070
2071 if (b->db_mode) {
2072 #ifdef FX
2073 if (FXswapBuffers(b))
2074 return;
2075 #endif
2076 if (b->backxrb->ximage) {
2077 /* Copy Ximage (back buf) from client memory to server window */
2078 #if defined(USE_XSHM) && !defined(XFree86Server)
2079 if (b->shm) {
2080 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2081 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2082 b->swapgc,
2083 b->backxrb->ximage, 0, 0,
2084 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2085 False );
2086 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2087 }
2088 else
2089 #endif
2090 {
2091 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2092 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2093 b->swapgc,
2094 b->backxrb->ximage, 0, 0,
2095 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
2096 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2097 }
2098 }
2099 else if (b->backxrb->pixmap) {
2100 /* Copy pixmap (back buf) to window (front buf) on server */
2101 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2102 XMesaCopyArea( b->xm_visual->display,
2103 b->backxrb->pixmap, /* source drawable */
2104 b->frontxrb->drawable, /* dest. drawable */
2105 b->swapgc,
2106 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2107 0, 0 /* dest region */
2108 );
2109 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2110 }
2111
2112 if (b->swAlpha)
2113 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer);
2114 }
2115 #if !defined(XFree86Server)
2116 XSync( b->xm_visual->display, False );
2117 #endif
2118 }
2119
2120
2121
2122 /*
2123 * Copy sub-region of back buffer to front buffer
2124 */
2125 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2126 {
2127 GET_CURRENT_CONTEXT(ctx);
2128
2129 /* If we're swapping the buffer associated with the current context
2130 * we have to flush any pending rendering commands first.
2131 */
2132 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2133 _mesa_notifySwapBuffers(ctx);
2134
2135 if (!b->backxrb) {
2136 /* single buffered */
2137 return;
2138 }
2139
2140 if (b->db_mode) {
2141 int yTop = b->mesa_buffer.Height - y - height;
2142 #ifdef FX
2143 if (FXswapBuffers(b))
2144 return;
2145 #endif
2146 if (b->backxrb->ximage) {
2147 /* Copy Ximage from host's memory to server's window */
2148 #if defined(USE_XSHM) && !defined(XFree86Server)
2149 if (b->shm) {
2150 /* XXX assuming width and height aren't too large! */
2151 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2152 b->swapgc,
2153 b->backxrb->ximage, x, yTop,
2154 x, yTop, width, height, False );
2155 /* wait for finished event??? */
2156 }
2157 else
2158 #endif
2159 {
2160 /* XXX assuming width and height aren't too large! */
2161 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2162 b->swapgc,
2163 b->backxrb->ximage, x, yTop,
2164 x, yTop, width, height );
2165 }
2166 }
2167 else {
2168 /* Copy pixmap to window on server */
2169 XMesaCopyArea( b->xm_visual->display,
2170 b->backxrb->pixmap, /* source drawable */
2171 b->frontxrb->drawable, /* dest. drawable */
2172 b->swapgc,
2173 x, yTop, width, height, /* source region */
2174 x, yTop /* dest region */
2175 );
2176 }
2177 }
2178 }
2179
2180
2181 /*
2182 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2183 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2184 * back buffer directly.
2185 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2186 * ximage - pointer to back buffer's XImage, or NULL
2187 * Return: GL_TRUE = context is double buffered
2188 * GL_FALSE = context is single buffered
2189 */
2190 #ifndef XFree86Server
2191 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2192 XMesaPixmap *pixmap,
2193 XMesaImage **ximage )
2194 {
2195 if (b->db_mode) {
2196 if (pixmap)
2197 *pixmap = b->backxrb->pixmap;
2198 if (ximage)
2199 *ximage = b->backxrb->ximage;
2200 return GL_TRUE;
2201 }
2202 else {
2203 *pixmap = 0;
2204 *ximage = NULL;
2205 return GL_FALSE;
2206 }
2207 }
2208 #endif /* XFree86Server */
2209
2210
2211 /*
2212 * Return the depth buffer associated with an XMesaBuffer.
2213 * Input: b - the XMesa buffer handle
2214 * Output: width, height - size of buffer in pixels
2215 * bytesPerValue - bytes per depth value (2 or 4)
2216 * buffer - pointer to depth buffer values
2217 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2218 */
2219 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2220 GLint *bytesPerValue, void **buffer )
2221 {
2222 struct gl_renderbuffer *rb
2223 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
2224 if (!rb || !rb->Data) {
2225 *width = 0;
2226 *height = 0;
2227 *bytesPerValue = 0;
2228 *buffer = 0;
2229 return GL_FALSE;
2230 }
2231 else {
2232 *width = b->mesa_buffer.Width;
2233 *height = b->mesa_buffer.Height;
2234 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
2235 ? sizeof(GLushort) : sizeof(GLuint);
2236 *buffer = rb->Data;
2237 return GL_TRUE;
2238 }
2239 }
2240
2241
2242 void XMesaFlush( XMesaContext c )
2243 {
2244 if (c && c->xm_visual) {
2245 #ifdef XFree86Server
2246 /* NOT_NEEDED */
2247 #else
2248 XSync( c->xm_visual->display, False );
2249 #endif
2250 }
2251 }
2252
2253
2254
2255 const char *XMesaGetString( XMesaContext c, int name )
2256 {
2257 (void) c;
2258 if (name==XMESA_VERSION) {
2259 return "5.0";
2260 }
2261 else if (name==XMESA_EXTENSIONS) {
2262 return "";
2263 }
2264 else {
2265 return NULL;
2266 }
2267 }
2268
2269
2270
2271 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2272 {
2273 XMesaBuffer b;
2274 for (b=XMesaBufferList; b; b=b->Next) {
2275 if (b->frontxrb->drawable == d && b->display == dpy) {
2276 return b;
2277 }
2278 }
2279 return NULL;
2280 }
2281
2282
2283 /**
2284 * Free/destroy all XMesaBuffers associated with given display.
2285 */
2286 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
2287 {
2288 XMesaBuffer b, next;
2289 for (b = XMesaBufferList; b; b = next) {
2290 next = b->Next;
2291 if (b->display == dpy) {
2292 xmesa_free_buffer(b);
2293 }
2294 }
2295 }
2296
2297
2298 /*
2299 * Look for XMesaBuffers whose X window has been destroyed.
2300 * Deallocate any such XMesaBuffers.
2301 */
2302 void XMesaGarbageCollect( void )
2303 {
2304 XMesaBuffer b, next;
2305 for (b=XMesaBufferList; b; b=next) {
2306 next = b->Next;
2307 if (b->display && b->frontxrb->drawable && b->type == WINDOW) {
2308 #ifdef XFree86Server
2309 /* NOT_NEEDED */
2310 #else
2311 XSync(b->display, False);
2312 if (!window_exists( b->display, b->frontxrb->drawable )) {
2313 /* found a dead window, free the ancillary info */
2314 XMesaDestroyBuffer( b );
2315 }
2316 #endif
2317 }
2318 }
2319 }
2320
2321
2322 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2323 GLfloat red, GLfloat green,
2324 GLfloat blue, GLfloat alpha )
2325 {
2326 GLcontext *ctx = &xmesa->mesa;
2327 GLint r = (GLint) (red * 255.0F);
2328 GLint g = (GLint) (green * 255.0F);
2329 GLint b = (GLint) (blue * 255.0F);
2330 GLint a = (GLint) (alpha * 255.0F);
2331
2332 switch (xmesa->pixelformat) {
2333 case PF_Index:
2334 return 0;
2335 case PF_Truecolor:
2336 {
2337 unsigned long p;
2338 PACK_TRUECOLOR( p, r, g, b );
2339 return p;
2340 }
2341 case PF_8A8B8G8R:
2342 return PACK_8A8B8G8R( r, g, b, a );
2343 case PF_8A8R8G8B:
2344 return PACK_8A8R8G8B( r, g, b, a );
2345 case PF_8R8G8B:
2346 return PACK_8R8G8B( r, g, b );
2347 case PF_5R6G5B:
2348 return PACK_5R6G5B( r, g, b );
2349 case PF_Dither:
2350 {
2351 DITHER_SETUP;
2352 return DITHER( x, y, r, g, b );
2353 }
2354 case PF_1Bit:
2355 /* 382 = (3*255)/2 */
2356 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2357 case PF_HPCR:
2358 return DITHER_HPCR(x, y, r, g, b);
2359 case PF_Lookup:
2360 {
2361 LOOKUP_SETUP;
2362 return LOOKUP( r, g, b );
2363 }
2364 case PF_Grayscale:
2365 return GRAY_RGB( r, g, b );
2366 case PF_Dither_5R6G5B:
2367 /* fall through */
2368 case PF_Dither_True:
2369 {
2370 unsigned long p;
2371 PACK_TRUEDITHER(p, x, y, r, g, b);
2372 return p;
2373 }
2374 default:
2375 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
2376 }
2377 return 0;
2378 }
2379
2380
2381 /*
2382 * This is typically called when the window size changes and we need
2383 * to reallocate the buffer's back/depth/stencil/accum buffers.
2384 */
2385 PUBLIC void
2386 XMesaResizeBuffers( XMesaBuffer b )
2387 {
2388 GET_CURRENT_CONTEXT(ctx);
2389 XMesaContext xmctx = XMESA_CONTEXT(ctx);
2390 if (!xmctx)
2391 return;
2392 xmesa_check_and_update_buffer_size(xmctx, b);
2393 }
2394
2395
2396 static GLint
2397 xbuffer_to_renderbuffer(int buffer)
2398 {
2399 assert(MAX_AUX_BUFFERS <= 4);
2400
2401 switch (buffer) {
2402 case GLX_FRONT_LEFT_EXT:
2403 return BUFFER_FRONT_LEFT;
2404 case GLX_FRONT_RIGHT_EXT:
2405 return BUFFER_FRONT_RIGHT;
2406 case GLX_BACK_LEFT_EXT:
2407 return BUFFER_BACK_LEFT;
2408 case GLX_BACK_RIGHT_EXT:
2409 return BUFFER_BACK_RIGHT;
2410 case GLX_AUX0_EXT:
2411 return BUFFER_AUX0;
2412 case GLX_AUX1_EXT:
2413 return BUFFER_AUX1;
2414 case GLX_AUX2_EXT:
2415 return BUFFER_AUX2;
2416 case GLX_AUX3_EXT:
2417 return BUFFER_AUX3;
2418 case GLX_AUX4_EXT:
2419 case GLX_AUX5_EXT:
2420 case GLX_AUX6_EXT:
2421 case GLX_AUX7_EXT:
2422 case GLX_AUX8_EXT:
2423 case GLX_AUX9_EXT:
2424 default:
2425 /* BadValue error */
2426 return -1;
2427 }
2428 }
2429
2430
2431 PUBLIC void
2432 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
2433 const int *attrib_list)
2434 {
2435 #if 0
2436 GET_CURRENT_CONTEXT(ctx);
2437 const GLuint unit = ctx->Texture.CurrentUnit;
2438 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
2439 struct gl_texture_object *texObj;
2440 #endif
2441 struct gl_renderbuffer *rb;
2442 struct xmesa_renderbuffer *xrb;
2443 GLint b;
2444 XMesaImage *img = NULL;
2445 GLboolean freeImg = GL_FALSE;
2446
2447 b = xbuffer_to_renderbuffer(buffer);
2448 if (b < 0)
2449 return;
2450
2451 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
2452 return; /* BadMatch error */
2453
2454 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
2455 if (!rb) {
2456 /* invalid buffer */
2457 return;
2458 }
2459 xrb = xmesa_renderbuffer(rb);
2460
2461 #if 0
2462 switch (drawable->TextureTarget) {
2463 case GLX_TEXTURE_1D_EXT:
2464 texObj = texUnit->Current1D;
2465 break;
2466 case GLX_TEXTURE_2D_EXT:
2467 texObj = texUnit->Current2D;
2468 break;
2469 case GLX_TEXTURE_RECTANGLE_EXT:
2470 texObj = texUnit->CurrentRect;
2471 break;
2472 default:
2473 return; /* BadMatch error */
2474 }
2475 #endif
2476
2477 /*
2478 * The following is a quick and simple way to implement
2479 * BindTexImage. The better way is to write some new FetchTexel()
2480 * functions which would extract texels from XImages. We'd still
2481 * need to use GetImage when texturing from a Pixmap (front buffer)
2482 * but texturing from a back buffer (XImage) would avoid an image
2483 * copy.
2484 */
2485
2486 /* get XImage */
2487 if (xrb->pixmap) {
2488 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
2489 ZPixmap);
2490 freeImg = GL_TRUE;
2491 }
2492 else if (xrb->ximage) {
2493 img = xrb->ximage;
2494 }
2495
2496 /* store the XImage as a new texture image */
2497 if (img) {
2498 GLenum format, type, intFormat;
2499 if (img->bits_per_pixel == 32) {
2500 format = GL_BGRA;
2501 type = GL_UNSIGNED_BYTE;
2502 intFormat = GL_RGBA;
2503 }
2504 else if (img->bits_per_pixel == 24) {
2505 format = GL_BGR;
2506 type = GL_UNSIGNED_BYTE;
2507 intFormat = GL_RGB;
2508 }
2509 else if (img->bits_per_pixel == 16) {
2510 format = GL_BGR;
2511 type = GL_UNSIGNED_SHORT_5_6_5;
2512 intFormat = GL_RGB;
2513 }
2514 else {
2515 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
2516 return;
2517 }
2518 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2519 intFormat = GL_RGBA;
2520 }
2521 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
2522 intFormat = GL_RGB;
2523 }
2524
2525 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
2526 format, type, img->data);
2527
2528 if (freeImg) {
2529 XMesaDestroyImage(img);
2530 }
2531 }
2532 }
2533
2534
2535
2536 PUBLIC void
2537 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
2538 {
2539 const GLint b = xbuffer_to_renderbuffer(buffer);
2540 if (b < 0)
2541 return;
2542
2543 /* no-op for now */
2544 }
2545