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Merge branch 'mesa_7_6_branch'
[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 #include "drivers/common/meta.h"
83
84 /**
85 * Global X driver lock
86 */
87 _glthread_Mutex _xmesa_lock;
88
89
90
91 /**
92 * Lookup tables for HPCR pixel format:
93 */
94 static short hpcr_rgbTbl[3][256] = {
95 {
96 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
97 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
98 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
99 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
100 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
101 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
102 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
103 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
104 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
105 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
106 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
107 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
108 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
109 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
110 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
111 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
112 },
113 {
114 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
115 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
116 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
117 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
118 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
119 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
120 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
121 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
122 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
123 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
124 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
125 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
126 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
127 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
128 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
129 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
130 },
131 {
132 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
133 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
134 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
135 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
136 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
137 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
138 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
139 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
140 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
141 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
142 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
143 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
144 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
145 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
146 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
147 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
148 }
149 };
150
151
152
153 /**********************************************************************/
154 /***** X Utility Functions *****/
155 /**********************************************************************/
156
157
158 /**
159 * Return the host's byte order as LSBFirst or MSBFirst ala X.
160 */
161 #ifndef XFree86Server
162 static int host_byte_order( void )
163 {
164 int i = 1;
165 char *cptr = (char *) &i;
166 return (*cptr==1) ? LSBFirst : MSBFirst;
167 }
168 #endif
169
170
171 /**
172 * Check if the X Shared Memory extension is available.
173 * Return: 0 = not available
174 * 1 = shared XImage support available
175 * 2 = shared Pixmap support available also
176 */
177 static int check_for_xshm( XMesaDisplay *display )
178 {
179 #if defined(USE_XSHM) && !defined(XFree86Server)
180 int major, minor, ignore;
181 Bool pixmaps;
182
183 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
184 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) {
185 return (pixmaps==True) ? 2 : 1;
186 }
187 else {
188 return 0;
189 }
190 }
191 else {
192 return 0;
193 }
194 #else
195 /* No XSHM support */
196 return 0;
197 #endif
198 }
199
200
201 /**
202 * Apply gamma correction to an intensity value in [0..max]. Return the
203 * new intensity value.
204 */
205 static GLint
206 gamma_adjust( GLfloat gamma, GLint value, GLint max )
207 {
208 if (gamma == 1.0) {
209 return value;
210 }
211 else {
212 double x = (double) value / (double) max;
213 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma));
214 }
215 }
216
217
218
219 /**
220 * Return the true number of bits per pixel for XImages.
221 * For example, if we request a 24-bit deep visual we may actually need/get
222 * 32bpp XImages. This function returns the appropriate bpp.
223 * Input: dpy - the X display
224 * visinfo - desribes the visual to be used for XImages
225 * Return: true number of bits per pixel for XImages
226 */
227 static int
228 bits_per_pixel( XMesaVisual xmv )
229 {
230 #ifdef XFree86Server
231 const int depth = xmv->nplanes;
232 int i;
233 assert(depth > 0);
234 for (i = 0; i < screenInfo.numPixmapFormats; i++) {
235 if (screenInfo.formats[i].depth == depth)
236 return screenInfo.formats[i].bitsPerPixel;
237 }
238 return depth; /* should never get here, but this should be safe */
239 #else
240 XMesaDisplay *dpy = xmv->display;
241 XMesaVisualInfo visinfo = xmv->visinfo;
242 XMesaImage *img;
243 int bitsPerPixel;
244 /* Create a temporary XImage */
245 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
246 ZPixmap, 0, /*format, offset*/
247 (char*) MALLOC(8), /*data*/
248 1, 1, /*width, height*/
249 32, /*bitmap_pad*/
250 0 /*bytes_per_line*/
251 );
252 assert(img);
253 /* grab the bits/pixel value */
254 bitsPerPixel = img->bits_per_pixel;
255 /* free the XImage */
256 _mesa_free( img->data );
257 img->data = NULL;
258 XMesaDestroyImage( img );
259 return bitsPerPixel;
260 #endif
261 }
262
263
264
265 /*
266 * Determine if a given X window ID is valid (window exists).
267 * Do this by calling XGetWindowAttributes() for the window and
268 * checking if we catch an X error.
269 * Input: dpy - the display
270 * win - the window to check for existance
271 * Return: GL_TRUE - window exists
272 * GL_FALSE - window doesn't exist
273 */
274 #ifndef XFree86Server
275 static GLboolean WindowExistsFlag;
276
277 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
278 {
279 (void) dpy;
280 if (xerr->error_code == BadWindow) {
281 WindowExistsFlag = GL_FALSE;
282 }
283 return 0;
284 }
285
286 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
287 {
288 XWindowAttributes wa;
289 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
290 WindowExistsFlag = GL_TRUE;
291 old_handler = XSetErrorHandler(window_exists_err_handler);
292 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
293 XSetErrorHandler(old_handler);
294 return WindowExistsFlag;
295 }
296
297 static Status
298 get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
299 {
300 Window root;
301 Status stat;
302 int xpos, ypos;
303 unsigned int w, h, bw, depth;
304 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
305 *width = w;
306 *height = h;
307 return stat;
308 }
309 #endif
310
311
312 /**
313 * Return the size of the window (or pixmap) that corresponds to the
314 * given XMesaBuffer.
315 * \param width returns width in pixels
316 * \param height returns height in pixels
317 */
318 void
319 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
320 GLuint *width, GLuint *height)
321 {
322 #ifdef XFree86Server
323 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH);
324 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT);
325 #else
326 Status stat;
327
328 _glthread_LOCK_MUTEX(_xmesa_lock);
329 XSync(b->xm_visual->display, 0); /* added for Chromium */
330 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
331 _glthread_UNLOCK_MUTEX(_xmesa_lock);
332
333 if (!stat) {
334 /* probably querying a window that's recently been destroyed */
335 _mesa_warning(NULL, "XGetGeometry failed!\n");
336 *width = *height = 1;
337 }
338 #endif
339 }
340
341
342
343 /**********************************************************************/
344 /***** Linked list of XMesaBuffers *****/
345 /**********************************************************************/
346
347 XMesaBuffer XMesaBufferList = NULL;
348
349
350 /**
351 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
352 * Note that XMesaBuffer is derived from GLframebuffer.
353 * The new XMesaBuffer will not have any size (Width=Height=0).
354 *
355 * \param d the corresponding X drawable (window or pixmap)
356 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
357 * \param vis the buffer's visual
358 * \param cmap the window's colormap, if known.
359 * \return new XMesaBuffer or NULL if any problem
360 */
361 static XMesaBuffer
362 create_xmesa_buffer(XMesaDrawable d, BufferType type,
363 XMesaVisual vis, XMesaColormap cmap)
364 {
365 XMesaBuffer b;
366
367 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
368
369 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
370 if (!b)
371 return NULL;
372
373 b->display = vis->display;
374 b->xm_visual = vis;
375 b->type = type;
376 b->cmap = cmap;
377
378 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
379 b->mesa_buffer.Delete = xmesa_delete_framebuffer;
380
381 /*
382 * Front renderbuffer
383 */
384 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE);
385 if (!b->frontxrb) {
386 _mesa_free(b);
387 return NULL;
388 }
389 b->frontxrb->Parent = b;
390 b->frontxrb->drawable = d;
391 b->frontxrb->pixmap = (XMesaPixmap) d;
392 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
393 &b->frontxrb->Base);
394
395 /*
396 * Back renderbuffer
397 */
398 if (vis->mesa_visual.doubleBufferMode) {
399 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE);
400 if (!b->backxrb) {
401 /* XXX free front xrb too */
402 _mesa_free(b);
403 return NULL;
404 }
405 b->backxrb->Parent = b;
406 /* determine back buffer implementation */
407 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
408
409 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
410 &b->backxrb->Base);
411 }
412
413 /*
414 * Software alpha planes
415 */
416 if (vis->mesa_visual.alphaBits > 0
417 && vis->undithered_pf != PF_8A8B8G8R
418 && vis->undithered_pf != PF_8A8R8G8B) {
419 /* Visual has alpha, but pixel format doesn't support it.
420 * We'll use an alpha renderbuffer wrapper.
421 */
422 b->swAlpha = GL_TRUE;
423 }
424 else {
425 b->swAlpha = GL_FALSE;
426 }
427
428 /*
429 * Other renderbuffer (depth, stencil, etc)
430 */
431 _mesa_add_soft_renderbuffers(&b->mesa_buffer,
432 GL_FALSE, /* color */
433 vis->mesa_visual.haveDepthBuffer,
434 vis->mesa_visual.haveStencilBuffer,
435 vis->mesa_visual.haveAccumBuffer,
436 b->swAlpha,
437 vis->mesa_visual.numAuxBuffers > 0 );
438
439 /* GLX_EXT_texture_from_pixmap */
440 b->TextureTarget = 0;
441 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
442 b->TextureMipmap = 0;
443
444 /* insert buffer into linked list */
445 b->Next = XMesaBufferList;
446 XMesaBufferList = b;
447
448 return b;
449 }
450
451
452 /**
453 * Find an XMesaBuffer by matching X display and colormap but NOT matching
454 * the notThis buffer.
455 */
456 XMesaBuffer
457 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
458 {
459 XMesaBuffer b;
460 for (b=XMesaBufferList; b; b=b->Next) {
461 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
462 return b;
463 }
464 }
465 return NULL;
466 }
467
468
469 /**
470 * Remove buffer from linked list, delete if no longer referenced.
471 */
472 static void
473 xmesa_free_buffer(XMesaBuffer buffer)
474 {
475 XMesaBuffer prev = NULL, b;
476
477 for (b = XMesaBufferList; b; b = b->Next) {
478 if (b == buffer) {
479 struct gl_framebuffer *fb = &buffer->mesa_buffer;
480
481 /* unlink buffer from list */
482 if (prev)
483 prev->Next = buffer->Next;
484 else
485 XMesaBufferList = buffer->Next;
486
487 /* mark as delete pending */
488 fb->DeletePending = GL_TRUE;
489
490 /* Since the X window for the XMesaBuffer is going away, we don't
491 * want to dereference this pointer in the future.
492 */
493 b->frontxrb->drawable = 0;
494
495 /* Unreference. If count = zero we'll really delete the buffer */
496 _mesa_reference_framebuffer(&fb, NULL);
497
498 return;
499 }
500 /* continue search */
501 prev = b;
502 }
503 /* buffer not found in XMesaBufferList */
504 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
505 }
506
507
508 /**
509 * Copy X color table stuff from one XMesaBuffer to another.
510 */
511 static void
512 copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
513 {
514 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table));
515 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r));
516 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g));
517 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b));
518 dst->num_alloced = src->num_alloced;
519 MEMCPY(dst->alloced_colors, src->alloced_colors,
520 sizeof(src->alloced_colors));
521 }
522
523
524
525 /**********************************************************************/
526 /***** Misc Private Functions *****/
527 /**********************************************************************/
528
529
530 /**
531 * A replacement for XAllocColor. This function should never
532 * fail to allocate a color. When XAllocColor fails, we return
533 * the nearest matching color. If we have to allocate many colors
534 * this function isn't too efficient; the XQueryColors() could be
535 * done just once.
536 * Written by Michael Pichler, Brian Paul, Mark Kilgard
537 * Input: dpy - X display
538 * cmap - X colormap
539 * cmapSize - size of colormap
540 * In/Out: color - the XColor struct
541 * Output: exact - 1=exact color match, 0=closest match
542 * alloced - 1=XAlloc worked, 0=XAlloc failed
543 */
544 static void
545 noFaultXAllocColor( int client,
546 XMesaDisplay *dpy,
547 XMesaColormap cmap,
548 int cmapSize,
549 XMesaColor *color,
550 int *exact, int *alloced )
551 {
552 #ifdef XFree86Server
553 Pixel *ppixIn;
554 xrgb *ctable;
555 #else
556 /* we'll try to cache ctable for better remote display performance */
557 static Display *prevDisplay = NULL;
558 static XMesaColormap prevCmap = 0;
559 static int prevCmapSize = 0;
560 static XMesaColor *ctable = NULL;
561 #endif
562 XMesaColor subColor;
563 int i, bestmatch;
564 double mindist; /* 3*2^16^2 exceeds long int precision. */
565
566 (void) client;
567
568 /* First try just using XAllocColor. */
569 #ifdef XFree86Server
570 if (AllocColor(cmap,
571 &color->red, &color->green, &color->blue,
572 &color->pixel,
573 client) == Success)
574 #else
575 if (XAllocColor(dpy, cmap, color))
576 #endif
577 {
578 *exact = 1;
579 *alloced = 1;
580 return;
581 }
582
583 /* Alloc failed, search for closest match */
584
585 /* Retrieve color table entries. */
586 /* XXX alloca candidate. */
587 #ifdef XFree86Server
588 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel));
589 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb));
590 for (i = 0; i < cmapSize; i++) {
591 ppixIn[i] = i;
592 }
593 QueryColors(cmap, cmapSize, ppixIn, ctable);
594 #else
595 if (prevDisplay != dpy || prevCmap != cmap
596 || prevCmapSize != cmapSize || !ctable) {
597 /* free previously cached color table */
598 if (ctable)
599 _mesa_free(ctable);
600 /* Get the color table from X */
601 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor));
602 assert(ctable);
603 for (i = 0; i < cmapSize; i++) {
604 ctable[i].pixel = i;
605 }
606 XQueryColors(dpy, cmap, ctable, cmapSize);
607 prevDisplay = dpy;
608 prevCmap = cmap;
609 prevCmapSize = cmapSize;
610 }
611 #endif
612
613 /* Find best match. */
614 bestmatch = -1;
615 mindist = 0.0;
616 for (i = 0; i < cmapSize; i++) {
617 double dr = 0.30 * ((double) color->red - (double) ctable[i].red);
618 double dg = 0.59 * ((double) color->green - (double) ctable[i].green);
619 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue);
620 double dist = dr * dr + dg * dg + db * db;
621 if (bestmatch < 0 || dist < mindist) {
622 bestmatch = i;
623 mindist = dist;
624 }
625 }
626
627 /* Return result. */
628 subColor.red = ctable[bestmatch].red;
629 subColor.green = ctable[bestmatch].green;
630 subColor.blue = ctable[bestmatch].blue;
631 /* Try to allocate the closest match color. This should only
632 * fail if the cell is read/write. Otherwise, we're incrementing
633 * the cell's reference count.
634 */
635 #ifdef XFree86Server
636 if (AllocColor(cmap,
637 &subColor.red, &subColor.green, &subColor.blue,
638 &subColor.pixel,
639 client) == Success) {
640 #else
641 if (XAllocColor(dpy, cmap, &subColor)) {
642 #endif
643 *alloced = 1;
644 }
645 else {
646 /* do this to work around a problem reported by Frank Ortega */
647 subColor.pixel = (unsigned long) bestmatch;
648 subColor.red = ctable[bestmatch].red;
649 subColor.green = ctable[bestmatch].green;
650 subColor.blue = ctable[bestmatch].blue;
651 subColor.flags = DoRed | DoGreen | DoBlue;
652 *alloced = 0;
653 }
654 #ifdef XFree86Server
655 _mesa_free(ppixIn);
656 _mesa_free(ctable);
657 #else
658 /* don't free table, save it for next time */
659 #endif
660
661 *color = subColor;
662 *exact = 0;
663 }
664
665
666
667 /**
668 * Do setup for PF_GRAYSCALE pixel format.
669 * Note that buffer may be NULL.
670 */
671 static GLboolean
672 setup_grayscale(int client, XMesaVisual v,
673 XMesaBuffer buffer, XMesaColormap cmap)
674 {
675 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
676 return GL_FALSE;
677 }
678
679 if (buffer) {
680 XMesaBuffer prevBuffer;
681
682 if (!cmap) {
683 return GL_FALSE;
684 }
685
686 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
687 if (prevBuffer &&
688 (buffer->xm_visual->mesa_visual.rgbMode ==
689 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
690 /* Copy colormap stuff from previous XMesaBuffer which uses same
691 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
692 */
693 copy_colortable_info(buffer, prevBuffer);
694 }
695 else {
696 /* Allocate 256 shades of gray */
697 int gray;
698 int colorsfailed = 0;
699 for (gray=0;gray<256;gray++) {
700 GLint r = gamma_adjust( v->RedGamma, gray, 255 );
701 GLint g = gamma_adjust( v->GreenGamma, gray, 255 );
702 GLint b = gamma_adjust( v->BlueGamma, gray, 255 );
703 int exact, alloced;
704 XMesaColor xcol;
705 xcol.red = (r << 8) | r;
706 xcol.green = (g << 8) | g;
707 xcol.blue = (b << 8) | b;
708 noFaultXAllocColor( client, v->display,
709 cmap, GET_COLORMAP_SIZE(v),
710 &xcol, &exact, &alloced );
711 if (!exact) {
712 colorsfailed++;
713 }
714 if (alloced) {
715 assert(buffer->num_alloced<256);
716 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
717 buffer->num_alloced++;
718 }
719
720 /*OLD
721 assert(gray < 576);
722 buffer->color_table[gray*3+0] = xcol.pixel;
723 buffer->color_table[gray*3+1] = xcol.pixel;
724 buffer->color_table[gray*3+2] = xcol.pixel;
725 assert(xcol.pixel < 65536);
726 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
727 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
728 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
729 */
730 buffer->color_table[gray] = xcol.pixel;
731 assert(xcol.pixel < 65536);
732 buffer->pixel_to_r[xcol.pixel] = gray;
733 buffer->pixel_to_g[xcol.pixel] = gray;
734 buffer->pixel_to_b[xcol.pixel] = gray;
735 }
736
737 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
738 _mesa_warning(NULL,
739 "Note: %d out of 256 needed colors do not match exactly.\n",
740 colorsfailed );
741 }
742 }
743 }
744
745 v->dithered_pf = PF_Grayscale;
746 v->undithered_pf = PF_Grayscale;
747 return GL_TRUE;
748 }
749
750
751
752 /**
753 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
754 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
755 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
756 * color. While this function was originally designed just for 8-bit
757 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
758 * Dithering code contributed by Bob Mercier.
759 */
760 static GLboolean
761 setup_dithered_color(int client, XMesaVisual v,
762 XMesaBuffer buffer, XMesaColormap cmap)
763 {
764 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
765 return GL_FALSE;
766 }
767
768 if (buffer) {
769 XMesaBuffer prevBuffer;
770
771 if (!cmap) {
772 return GL_FALSE;
773 }
774
775 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
776 if (prevBuffer &&
777 (buffer->xm_visual->mesa_visual.rgbMode ==
778 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
779 /* Copy colormap stuff from previous, matching XMesaBuffer.
780 * Do this to avoid time spent in noFaultXAllocColor.
781 */
782 copy_colortable_info(buffer, prevBuffer);
783 }
784 else {
785 /* Allocate X colors and initialize color_table[], red_table[], etc */
786 int r, g, b, i;
787 int colorsfailed = 0;
788 for (r = 0; r < DITH_R; r++) {
789 for (g = 0; g < DITH_G; g++) {
790 for (b = 0; b < DITH_B; b++) {
791 XMesaColor xcol;
792 int exact, alloced;
793 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535);
794 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535);
795 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535);
796 noFaultXAllocColor( client, v->display,
797 cmap, GET_COLORMAP_SIZE(v),
798 &xcol, &exact, &alloced );
799 if (!exact) {
800 colorsfailed++;
801 }
802 if (alloced) {
803 assert(buffer->num_alloced<256);
804 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
805 buffer->num_alloced++;
806 }
807 i = DITH_MIX( r, g, b );
808 assert(i < 576);
809 buffer->color_table[i] = xcol.pixel;
810 assert(xcol.pixel < 65536);
811 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1);
812 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1);
813 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1);
814 }
815 }
816 }
817
818 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
819 _mesa_warning(NULL,
820 "Note: %d out of %d needed colors do not match exactly.\n",
821 colorsfailed, DITH_R * DITH_G * DITH_B );
822 }
823 }
824 }
825
826 v->dithered_pf = PF_Dither;
827 v->undithered_pf = PF_Lookup;
828 return GL_TRUE;
829 }
830
831
832 /**
833 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
834 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
835 * Special dithering tables have to be initialized.
836 */
837 static void
838 setup_8bit_hpcr(XMesaVisual v)
839 {
840 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
841 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
842 * on the root window AND the colormap obtainable by XGetRGBColormaps
843 * for that atom must be set on the window. (see also tkInitWindow)
844 * If that colormap is not set, the output will look stripy.
845 */
846
847 /* Setup color tables with gamma correction */
848 int i;
849 double g;
850
851 g = 1.0 / v->RedGamma;
852 for (i=0; i<256; i++) {
853 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g ));
854 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 );
855 }
856
857 g = 1.0 / v->GreenGamma;
858 for (i=0; i<256; i++) {
859 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g ));
860 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 );
861 }
862
863 g = 1.0 / v->BlueGamma;
864 for (i=0; i<256; i++) {
865 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g ));
866 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 );
867 }
868 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */
869 v->dithered_pf = PF_HPCR;
870
871 /* which method should I use to clear */
872 /* GL_FALSE: keep the ordinary method */
873 /* GL_TRUE : clear with dither pattern */
874 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE;
875
876 if (v->hpcr_clear_flag) {
877 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display,
878 DefaultRootWindow(v->display),
879 16, 2, 8);
880 #ifndef XFree86Server
881 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap,
882 0, 0, 16, 2, AllPlanes, ZPixmap);
883 #endif
884 }
885 }
886
887
888 /**
889 * Setup RGB rendering for a window with a True/DirectColor visual.
890 */
891 static void
892 setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
893 {
894 unsigned long rmask, gmask, bmask;
895 (void) buffer;
896 (void) cmap;
897
898 /* Compute red multiplier (mask) and bit shift */
899 v->rshift = 0;
900 rmask = GET_REDMASK(v);
901 while ((rmask & 1)==0) {
902 v->rshift++;
903 rmask = rmask >> 1;
904 }
905
906 /* Compute green multiplier (mask) and bit shift */
907 v->gshift = 0;
908 gmask = GET_GREENMASK(v);
909 while ((gmask & 1)==0) {
910 v->gshift++;
911 gmask = gmask >> 1;
912 }
913
914 /* Compute blue multiplier (mask) and bit shift */
915 v->bshift = 0;
916 bmask = GET_BLUEMASK(v);
917 while ((bmask & 1)==0) {
918 v->bshift++;
919 bmask = bmask >> 1;
920 }
921
922 /*
923 * Compute component-to-pixel lookup tables and dithering kernel
924 */
925 {
926 static GLubyte kernel[16] = {
927 0*16, 8*16, 2*16, 10*16,
928 12*16, 4*16, 14*16, 6*16,
929 3*16, 11*16, 1*16, 9*16,
930 15*16, 7*16, 13*16, 5*16,
931 };
932 GLint rBits = _mesa_bitcount(rmask);
933 GLint gBits = _mesa_bitcount(gmask);
934 GLint bBits = _mesa_bitcount(bmask);
935 GLint maxBits;
936 GLuint i;
937
938 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
939 for (i=0; i<=rmask; i++)
940 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
941 for (i=0; i<=gmask; i++)
942 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
943 for (i=0; i<=bmask; i++)
944 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
945
946 /* convert RGB values from [0,255] to pixel components */
947
948 for (i=0;i<256;i++) {
949 GLint r = gamma_adjust(v->RedGamma, i, 255);
950 GLint g = gamma_adjust(v->GreenGamma, i, 255);
951 GLint b = gamma_adjust(v->BlueGamma, i, 255);
952 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
953 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
954 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
955 }
956 /* overflow protection */
957 for (i=256;i<512;i++) {
958 v->RtoPixel[i] = v->RtoPixel[255];
959 v->GtoPixel[i] = v->GtoPixel[255];
960 v->BtoPixel[i] = v->BtoPixel[255];
961 }
962
963 /* setup dithering kernel */
964 maxBits = rBits;
965 if (gBits > maxBits) maxBits = gBits;
966 if (bBits > maxBits) maxBits = bBits;
967 for (i=0;i<16;i++) {
968 v->Kernel[i] = kernel[i] >> maxBits;
969 }
970
971 v->undithered_pf = PF_Truecolor;
972 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
973 }
974
975 /*
976 * Now check for TrueColor visuals which we can optimize.
977 */
978 if ( GET_REDMASK(v) ==0x0000ff
979 && GET_GREENMASK(v)==0x00ff00
980 && GET_BLUEMASK(v) ==0xff0000
981 && CHECK_BYTE_ORDER(v)
982 && v->BitsPerPixel==32
983 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
984 /* common 32 bpp config used on SGI, Sun */
985 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
986 }
987 else if (GET_REDMASK(v) == 0xff0000
988 && GET_GREENMASK(v)== 0x00ff00
989 && GET_BLUEMASK(v) == 0x0000ff
990 && CHECK_BYTE_ORDER(v)
991 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
992 if (v->BitsPerPixel==32) {
993 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
994 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
995 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
996 else
997 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
998 }
999 else if (v->BitsPerPixel == 24) {
1000 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
1001 }
1002 }
1003 else if (GET_REDMASK(v) ==0xf800
1004 && GET_GREENMASK(v)==0x07e0
1005 && GET_BLUEMASK(v) ==0x001f
1006 && CHECK_BYTE_ORDER(v)
1007 && v->BitsPerPixel==16
1008 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1009 /* 5-6-5 RGB */
1010 v->undithered_pf = PF_5R6G5B;
1011 v->dithered_pf = PF_Dither_5R6G5B;
1012 }
1013 else if (GET_REDMASK(v) ==0xe0
1014 && GET_GREENMASK(v)==0x1c
1015 && GET_BLUEMASK(v) ==0x03
1016 && CHECK_FOR_HPCR(v)) {
1017 /* 8-bit HP color recovery */
1018 setup_8bit_hpcr( v );
1019 }
1020 }
1021
1022
1023
1024 /**
1025 * Setup RGB rendering for a window with a monochrome visual.
1026 */
1027 static void
1028 setup_monochrome( XMesaVisual v, XMesaBuffer b )
1029 {
1030 (void) b;
1031 v->dithered_pf = v->undithered_pf = PF_1Bit;
1032 /* if black=1 then we must flip pixel values */
1033 v->bitFlip = (GET_BLACK_PIXEL(v) != 0);
1034 }
1035
1036
1037
1038 /**
1039 * When a context is bound for the first time, we can finally finish
1040 * initializing the context's visual and buffer information.
1041 * \param v the XMesaVisual to initialize
1042 * \param b the XMesaBuffer to initialize (may be NULL)
1043 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1044 * \param window the window/pixmap we're rendering into
1045 * \param cmap the colormap associated with the window/pixmap
1046 * \return GL_TRUE=success, GL_FALSE=failure
1047 */
1048 static GLboolean
1049 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
1050 GLboolean rgb_flag, XMesaDrawable window,
1051 XMesaColormap cmap)
1052 {
1053 int client = 0;
1054
1055 #ifdef XFree86Server
1056 client = (window) ? CLIENT_ID(window->id) : 0;
1057 #endif
1058
1059 ASSERT(!b || b->xm_visual == v);
1060
1061 /* Save true bits/pixel */
1062 v->BitsPerPixel = bits_per_pixel(v);
1063 assert(v->BitsPerPixel > 0);
1064
1065 if (rgb_flag == GL_FALSE) {
1066 /* COLOR-INDEXED WINDOW:
1067 * Even if the visual is TrueColor or DirectColor we treat it as
1068 * being color indexed. This is weird but might be useful to someone.
1069 */
1070 v->dithered_pf = v->undithered_pf = PF_Index;
1071 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v);
1072 }
1073 else {
1074 /* RGB WINDOW:
1075 * We support RGB rendering into almost any kind of visual.
1076 */
1077 const int xclass = v->mesa_visual.visualType;
1078 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1079 setup_truecolor( v, b, cmap );
1080 }
1081 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) {
1082 setup_monochrome( v, b );
1083 }
1084 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) {
1085 if (!setup_grayscale( client, v, b, cmap )) {
1086 return GL_FALSE;
1087 }
1088 }
1089 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR)
1090 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) {
1091 if (!setup_dithered_color( client, v, b, cmap )) {
1092 return GL_FALSE;
1093 }
1094 }
1095 else {
1096 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
1097 return GL_FALSE;
1098 }
1099 v->mesa_visual.indexBits = 0;
1100
1101 if (_mesa_getenv("MESA_NO_DITHER")) {
1102 v->dithered_pf = v->undithered_pf;
1103 }
1104 }
1105
1106
1107 /*
1108 * If MESA_INFO env var is set print out some debugging info
1109 * which can help Brian figure out what's going on when a user
1110 * reports bugs.
1111 */
1112 if (_mesa_getenv("MESA_INFO")) {
1113 _mesa_printf("X/Mesa visual = %p\n", (void *) v);
1114 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
1115 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
1116 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level);
1117 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
1118 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
1119 }
1120
1121 if (b && window) {
1122 char *data;
1123
1124 /* Do window-specific initializations */
1125
1126 /* these should have been set in create_xmesa_buffer */
1127 ASSERT(b->frontxrb->drawable == window);
1128 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
1129
1130 /* Setup for single/double buffering */
1131 if (v->mesa_visual.doubleBufferMode) {
1132 /* Double buffered */
1133 b->shm = check_for_xshm( v->display );
1134 }
1135
1136 /* X11 graphics contexts */
1137 #ifdef XFree86Server
1138 b->gc = CreateScratchGC(v->display, window->depth);
1139 #else
1140 b->gc = XCreateGC( v->display, window, 0, NULL );
1141 #endif
1142 XMesaSetFunction( v->display, b->gc, GXcopy );
1143
1144 /* cleargc - for glClear() */
1145 #ifdef XFree86Server
1146 b->cleargc = CreateScratchGC(v->display, window->depth);
1147 #else
1148 b->cleargc = XCreateGC( v->display, window, 0, NULL );
1149 #endif
1150 XMesaSetFunction( v->display, b->cleargc, GXcopy );
1151
1152 /*
1153 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1154 * Patch contributed by Michael Pichler May 15, 1995.
1155 */
1156 #ifdef XFree86Server
1157 b->swapgc = CreateScratchGC(v->display, window->depth);
1158 {
1159 CARD32 v[1];
1160 v[0] = FALSE;
1161 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL);
1162 }
1163 #else
1164 {
1165 XGCValues gcvalues;
1166 gcvalues.graphics_exposures = False;
1167 b->swapgc = XCreateGC(v->display, window,
1168 GCGraphicsExposures, &gcvalues);
1169 }
1170 #endif
1171 XMesaSetFunction( v->display, b->swapgc, GXcopy );
1172 /*
1173 * Set fill style and tile pixmap once for all for HPCR stuff
1174 * (instead of doing it each time in clear_color_HPCR_pixmap())
1175 * Initialize whole stuff
1176 * Patch contributed by Jacques Leroy March 8, 1998.
1177 */
1178 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) {
1179 int i;
1180 for (i = 0; i < 16; i++) {
1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0);
1182 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0);
1183 }
1184 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap,
1185 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2);
1186 XMesaSetFillStyle( v->display, b->cleargc, FillTiled);
1187 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap );
1188 }
1189
1190 /* Initialize the row buffer XImage for use in write_color_span() */
1191 data = (char*) MALLOC(MAX_WIDTH*4);
1192 #ifdef XFree86Server
1193 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data);
1194 #else
1195 b->rowimage = XCreateImage( v->display,
1196 v->visinfo->visual,
1197 v->visinfo->depth,
1198 ZPixmap, 0, /*format, offset*/
1199 data, /*data*/
1200 MAX_WIDTH, 1, /*width, height*/
1201 32, /*bitmap_pad*/
1202 0 /*bytes_per_line*/ );
1203 #endif
1204 if (!b->rowimage)
1205 return GL_FALSE;
1206 }
1207
1208 return GL_TRUE;
1209 }
1210
1211
1212
1213 /*
1214 * Convert an RGBA color to a pixel value.
1215 */
1216 unsigned long
1217 xmesa_color_to_pixel(GLcontext *ctx,
1218 GLubyte r, GLubyte g, GLubyte b, GLubyte a,
1219 GLuint pixelFormat)
1220 {
1221 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1222 switch (pixelFormat) {
1223 case PF_Index:
1224 return 0;
1225 case PF_Truecolor:
1226 {
1227 unsigned long p;
1228 PACK_TRUECOLOR( p, r, g, b );
1229 return p;
1230 }
1231 case PF_8A8B8G8R:
1232 return PACK_8A8B8G8R( r, g, b, a );
1233 case PF_8A8R8G8B:
1234 return PACK_8A8R8G8B( r, g, b, a );
1235 case PF_8R8G8B:
1236 /* fall through */
1237 case PF_8R8G8B24:
1238 return PACK_8R8G8B( r, g, b );
1239 case PF_5R6G5B:
1240 return PACK_5R6G5B( r, g, b );
1241 case PF_Dither:
1242 {
1243 DITHER_SETUP;
1244 return DITHER( 1, 0, r, g, b );
1245 }
1246 case PF_1Bit:
1247 /* 382 = (3*255)/2 */
1248 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
1249 case PF_HPCR:
1250 return DITHER_HPCR(1, 1, r, g, b);
1251 case PF_Lookup:
1252 {
1253 LOOKUP_SETUP;
1254 return LOOKUP( r, g, b );
1255 }
1256 case PF_Grayscale:
1257 return GRAY_RGB( r, g, b );
1258 case PF_Dither_True:
1259 /* fall through */
1260 case PF_Dither_5R6G5B:
1261 {
1262 unsigned long p;
1263 PACK_TRUEDITHER(p, 1, 0, r, g, b);
1264 return p;
1265 }
1266 default:
1267 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
1268 }
1269 return 0;
1270 }
1271
1272
1273 #define NUM_VISUAL_TYPES 6
1274
1275 /**
1276 * Convert an X visual type to a GLX visual type.
1277 *
1278 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1279 * to be converted.
1280 * \return If \c visualType is a valid X visual type, a GLX visual type will
1281 * be returned. Otherwise \c GLX_NONE will be returned.
1282 *
1283 * \note
1284 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1285 * DRI CVS tree.
1286 */
1287 static GLint
1288 xmesa_convert_from_x_visual_type( int visualType )
1289 {
1290 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
1291 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
1292 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
1293 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
1294 };
1295
1296 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
1297 ? glx_visual_types[ visualType ] : GLX_NONE;
1298 }
1299
1300
1301 /**********************************************************************/
1302 /***** Public Functions *****/
1303 /**********************************************************************/
1304
1305
1306 #ifdef IN_DRI_DRIVER
1307 #define need_GL_VERSION_1_3
1308 #define need_GL_VERSION_1_4
1309 #define need_GL_VERSION_1_5
1310 #define need_GL_VERSION_2_0
1311
1312 /* sw extensions for imaging */
1313 #define need_GL_EXT_blend_color
1314 #define need_GL_EXT_blend_minmax
1315 #define need_GL_EXT_convolution
1316 #define need_GL_EXT_histogram
1317 #define need_GL_SGI_color_table
1318
1319 /* sw extensions not associated with some GL version */
1320 #define need_GL_ARB_draw_elements_base_vertex
1321 #define need_GL_ARB_shader_objects
1322 #define need_GL_ARB_sync
1323 #define need_GL_ARB_vertex_program
1324 #define need_GL_APPLE_vertex_array_object
1325 #define need_GL_ATI_fragment_shader
1326 #define need_GL_EXT_depth_bounds_test
1327 #define need_GL_EXT_framebuffer_object
1328 #define need_GL_EXT_framebuffer_blit
1329 #define need_GL_EXT_gpu_program_parameters
1330 #define need_GL_EXT_paletted_texture
1331 #define need_GL_MESA_resize_buffers
1332 #define need_GL_NV_vertex_program
1333 #define need_GL_NV_fragment_program
1334
1335 #include "extension_helper.h"
1336 #include "utils.h"
1337
1338 const struct dri_extension card_extensions[] =
1339 {
1340 { "GL_VERSION_1_3", GL_VERSION_1_3_functions },
1341 { "GL_VERSION_1_4", GL_VERSION_1_4_functions },
1342 { "GL_VERSION_1_5", GL_VERSION_1_5_functions },
1343 { "GL_VERSION_2_0", GL_VERSION_2_0_functions },
1344
1345 { "GL_EXT_blend_color", GL_EXT_blend_color_functions },
1346 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions },
1347 { "GL_EXT_convolution", GL_EXT_convolution_functions },
1348 { "GL_EXT_histogram", GL_EXT_histogram_functions },
1349 { "GL_SGI_color_table", GL_SGI_color_table_functions },
1350
1351 { "GL_ARB_depth_clamp", NULL },
1352 { "GL_ARB_draw_elements_base_vertex", GL_ARB_draw_elements_base_vertex_functions },
1353 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
1354 { "GL_ARB_sync", GL_ARB_sync_functions },
1355 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
1356 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
1357 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
1358 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
1359 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
1360 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
1361 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
1362 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
1363 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
1364 { "GL_NV_depth_clamp", NULL },
1365 { "GL_NV_vertex_program", GL_NV_vertex_program_functions },
1366 { "GL_NV_fragment_program", GL_NV_fragment_program_functions },
1367 { NULL, NULL }
1368 };
1369 #endif
1370
1371 /*
1372 * Create a new X/Mesa visual.
1373 * Input: display - X11 display
1374 * visinfo - an XVisualInfo pointer
1375 * rgb_flag - GL_TRUE = RGB mode,
1376 * GL_FALSE = color index mode
1377 * alpha_flag - alpha buffer requested?
1378 * db_flag - GL_TRUE = double-buffered,
1379 * GL_FALSE = single buffered
1380 * stereo_flag - stereo visual?
1381 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1382 * GL_FALSE = use an off-screen pixmap for back buffer
1383 * depth_size - requested bits/depth values, or zero
1384 * stencil_size - requested bits/stencil values, or zero
1385 * accum_red_size - requested bits/red accum values, or zero
1386 * accum_green_size - requested bits/green accum values, or zero
1387 * accum_blue_size - requested bits/blue accum values, or zero
1388 * accum_alpha_size - requested bits/alpha accum values, or zero
1389 * num_samples - number of samples/pixel if multisampling, or zero
1390 * level - visual level, usually 0
1391 * visualCaveat - ala the GLX extension, usually GLX_NONE
1392 * Return; a new XMesaVisual or 0 if error.
1393 */
1394 PUBLIC
1395 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1396 XMesaVisualInfo visinfo,
1397 GLboolean rgb_flag,
1398 GLboolean alpha_flag,
1399 GLboolean db_flag,
1400 GLboolean stereo_flag,
1401 GLboolean ximage_flag,
1402 GLint depth_size,
1403 GLint stencil_size,
1404 GLint accum_red_size,
1405 GLint accum_green_size,
1406 GLint accum_blue_size,
1407 GLint accum_alpha_size,
1408 GLint num_samples,
1409 GLint level,
1410 GLint visualCaveat )
1411 {
1412 char *gamma;
1413 XMesaVisual v;
1414 GLint red_bits, green_bits, blue_bits, alpha_bits;
1415
1416 #ifdef IN_DRI_DRIVER
1417 /* driInitExtensions() should be called once per screen to setup extension
1418 * indices. There is no need to call it when the context is created since
1419 * XMesa enables mesa sw extensions on its own.
1420 */
1421 driInitExtensions( NULL, card_extensions, GL_FALSE );
1422 #endif
1423
1424 #ifndef XFree86Server
1425 /* For debugging only */
1426 if (_mesa_getenv("MESA_XSYNC")) {
1427 /* This makes debugging X easier.
1428 * In your debugger, set a breakpoint on _XError to stop when an
1429 * X protocol error is generated.
1430 */
1431 XSynchronize( display, 1 );
1432 }
1433 #endif
1434
1435 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1436 if (!v) {
1437 return NULL;
1438 }
1439
1440 v->display = display;
1441
1442 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1443 * the struct but we may need some of the information contained in it
1444 * at a later time.
1445 */
1446 #ifndef XFree86Server
1447 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1448 if(!v->visinfo) {
1449 _mesa_free(v);
1450 return NULL;
1451 }
1452 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1453 #endif
1454
1455 /* check for MESA_GAMMA environment variable */
1456 gamma = _mesa_getenv("MESA_GAMMA");
1457 if (gamma) {
1458 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1459 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1460 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1461 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1462 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1463 }
1464 else {
1465 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1466 }
1467
1468 v->ximage_flag = ximage_flag;
1469
1470 #ifdef XFree86Server
1471 /* We could calculate these values by ourselves. nplanes is either the sum
1472 * of the red, green, and blue bits or the number index bits.
1473 * ColormapEntries is either (1U << index_bits) or
1474 * (1U << max(redBits, greenBits, blueBits)).
1475 */
1476 assert(visinfo->nplanes > 0);
1477 v->nplanes = visinfo->nplanes;
1478 v->ColormapEntries = visinfo->ColormapEntries;
1479
1480 v->mesa_visual.redMask = visinfo->redMask;
1481 v->mesa_visual.greenMask = visinfo->greenMask;
1482 v->mesa_visual.blueMask = visinfo->blueMask;
1483 v->mesa_visual.visualID = visinfo->vid;
1484 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */
1485 #else
1486 v->mesa_visual.redMask = visinfo->red_mask;
1487 v->mesa_visual.greenMask = visinfo->green_mask;
1488 v->mesa_visual.blueMask = visinfo->blue_mask;
1489 v->mesa_visual.visualID = visinfo->visualid;
1490 v->mesa_visual.screen = visinfo->screen;
1491 #endif
1492
1493 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1494 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
1495 #else
1496 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
1497 #endif
1498
1499 v->mesa_visual.visualRating = visualCaveat;
1500
1501 if (alpha_flag)
1502 v->mesa_visual.alphaBits = 8;
1503
1504 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
1505
1506 {
1507 const int xclass = v->mesa_visual.visualType;
1508 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1509 red_bits = _mesa_bitcount(GET_REDMASK(v));
1510 green_bits = _mesa_bitcount(GET_GREENMASK(v));
1511 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
1512 }
1513 else {
1514 /* this is an approximation */
1515 int depth;
1516 depth = GET_VISUAL_DEPTH(v);
1517 red_bits = depth / 3;
1518 depth -= red_bits;
1519 green_bits = depth / 2;
1520 depth -= green_bits;
1521 blue_bits = depth;
1522 alpha_bits = 0;
1523 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1524 }
1525 alpha_bits = v->mesa_visual.alphaBits;
1526 }
1527
1528 _mesa_initialize_visual( &v->mesa_visual,
1529 rgb_flag, db_flag, stereo_flag,
1530 red_bits, green_bits,
1531 blue_bits, alpha_bits,
1532 v->mesa_visual.indexBits,
1533 depth_size,
1534 stencil_size,
1535 accum_red_size, accum_green_size,
1536 accum_blue_size, accum_alpha_size,
1537 0 );
1538
1539 /* XXX minor hack */
1540 v->mesa_visual.level = level;
1541 return v;
1542 }
1543
1544
1545 PUBLIC
1546 void XMesaDestroyVisual( XMesaVisual v )
1547 {
1548 #ifndef XFree86Server
1549 _mesa_free(v->visinfo);
1550 #endif
1551 _mesa_free(v);
1552 }
1553
1554
1555
1556 /**
1557 * Create a new XMesaContext.
1558 * \param v the XMesaVisual
1559 * \param share_list another XMesaContext with which to share display
1560 * lists or NULL if no sharing is wanted.
1561 * \return an XMesaContext or NULL if error.
1562 */
1563 PUBLIC
1564 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1565 {
1566 static GLboolean firstTime = GL_TRUE;
1567 XMesaContext c;
1568 GLcontext *mesaCtx;
1569 struct dd_function_table functions;
1570 TNLcontext *tnl;
1571
1572 if (firstTime) {
1573 _glthread_INIT_MUTEX(_xmesa_lock);
1574 firstTime = GL_FALSE;
1575 }
1576
1577 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1578 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1579 if (!c)
1580 return NULL;
1581
1582 mesaCtx = &(c->mesa);
1583
1584 /* initialize with default driver functions, then plug in XMesa funcs */
1585 _mesa_init_driver_functions(&functions);
1586 xmesa_init_driver_functions(v, &functions);
1587 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
1588 share_list ? &(share_list->mesa) : (GLcontext *) NULL,
1589 &functions, (void *) c)) {
1590 _mesa_free(c);
1591 return NULL;
1592 }
1593
1594 /* Enable this to exercise fixed function -> shader translation
1595 * with software rendering.
1596 */
1597 if (0) {
1598 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE;
1599 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
1600 }
1601
1602 _mesa_enable_sw_extensions(mesaCtx);
1603 _mesa_enable_1_3_extensions(mesaCtx);
1604 _mesa_enable_1_4_extensions(mesaCtx);
1605 _mesa_enable_1_5_extensions(mesaCtx);
1606 _mesa_enable_2_0_extensions(mesaCtx);
1607 _mesa_enable_2_1_extensions(mesaCtx);
1608 #if ENABLE_EXT_texure_compression_s3tc
1609 if (mesaCtx->Mesa_DXTn) {
1610 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
1611 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
1612 }
1613 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
1614 #endif
1615 #if ENABLE_EXT_timer_query
1616 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
1617 #endif
1618
1619 #ifdef XFree86Server
1620 /* If we're running in the X server, do bounds checking to prevent
1621 * segfaults and server crashes!
1622 */
1623 mesaCtx->Const.CheckArrayBounds = GL_TRUE;
1624 #endif
1625
1626 /* finish up xmesa context initializations */
1627 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
1628 c->xm_visual = v;
1629 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1630 c->display = v->display;
1631 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1632
1633 /* Initialize the software rasterizer and helper modules.
1634 */
1635 if (!_swrast_CreateContext( mesaCtx ) ||
1636 !_vbo_CreateContext( mesaCtx ) ||
1637 !_tnl_CreateContext( mesaCtx ) ||
1638 !_swsetup_CreateContext( mesaCtx )) {
1639 _mesa_free_context_data(&c->mesa);
1640 _mesa_free(c);
1641 return NULL;
1642 }
1643
1644 /* tnl setup */
1645 tnl = TNL_CONTEXT(mesaCtx);
1646 tnl->Driver.RunPipeline = _tnl_run_pipeline;
1647 /* swrast setup */
1648 xmesa_register_swrast_functions( mesaCtx );
1649 _swsetup_Wakeup(mesaCtx);
1650
1651 _mesa_meta_init(mesaCtx);
1652
1653 return c;
1654 }
1655
1656
1657
1658 PUBLIC
1659 void XMesaDestroyContext( XMesaContext c )
1660 {
1661 GLcontext *mesaCtx = &c->mesa;
1662
1663 #ifdef FX
1664 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) );
1665 #endif
1666
1667 _mesa_meta_free( mesaCtx );
1668
1669 _swsetup_DestroyContext( mesaCtx );
1670 _swrast_DestroyContext( mesaCtx );
1671 _tnl_DestroyContext( mesaCtx );
1672 _vbo_DestroyContext( mesaCtx );
1673 _mesa_free_context_data( mesaCtx );
1674 _mesa_free( c );
1675 }
1676
1677
1678
1679 /**
1680 * Private function for creating an XMesaBuffer which corresponds to an
1681 * X window or pixmap.
1682 * \param v the window's XMesaVisual
1683 * \param w the window we're wrapping
1684 * \return new XMesaBuffer or NULL if error
1685 */
1686 PUBLIC XMesaBuffer
1687 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
1688 {
1689 #ifndef XFree86Server
1690 XWindowAttributes attr;
1691 #endif
1692 XMesaBuffer b;
1693 XMesaColormap cmap;
1694 int depth;
1695
1696 assert(v);
1697 assert(w);
1698
1699 /* Check that window depth matches visual depth */
1700 #ifdef XFree86Server
1701 depth = ((XMesaDrawable)w)->depth;
1702 #else
1703 XGetWindowAttributes( v->display, w, &attr );
1704 depth = attr.depth;
1705 #endif
1706 if (GET_VISUAL_DEPTH(v) != depth) {
1707 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1708 GET_VISUAL_DEPTH(v), depth);
1709 return NULL;
1710 }
1711
1712 /* Find colormap */
1713 #ifdef XFree86Server
1714 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1715 #else
1716 if (attr.colormap) {
1717 cmap = attr.colormap;
1718 }
1719 else {
1720 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1721 /* this is weird, a window w/out a colormap!? */
1722 /* OK, let's just allocate a new one and hope for the best */
1723 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1724 }
1725 #endif
1726
1727 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1728 if (!b)
1729 return NULL;
1730
1731 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1732 (XMesaDrawable) w, cmap )) {
1733 xmesa_free_buffer(b);
1734 return NULL;
1735 }
1736
1737 return b;
1738 }
1739
1740
1741
1742 /**
1743 * Create a new XMesaBuffer from an X pixmap.
1744 *
1745 * \param v the XMesaVisual
1746 * \param p the pixmap
1747 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1748 * \c GLX_DIRECT_COLOR visual for the pixmap
1749 * \returns new XMesaBuffer or NULL if error
1750 */
1751 PUBLIC XMesaBuffer
1752 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1753 {
1754 XMesaBuffer b;
1755
1756 assert(v);
1757
1758 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1759 if (!b)
1760 return NULL;
1761
1762 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1763 (XMesaDrawable) p, cmap)) {
1764 xmesa_free_buffer(b);
1765 return NULL;
1766 }
1767
1768 return b;
1769 }
1770
1771
1772 /**
1773 * For GLX_EXT_texture_from_pixmap
1774 */
1775 XMesaBuffer
1776 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1777 XMesaColormap cmap,
1778 int format, int target, int mipmap)
1779 {
1780 GET_CURRENT_CONTEXT(ctx);
1781 XMesaBuffer b;
1782 GLuint width, height;
1783
1784 assert(v);
1785
1786 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1787 if (!b)
1788 return NULL;
1789
1790 /* get pixmap size, update framebuffer/renderbuffer dims */
1791 xmesa_get_window_size(v->display, b, &width, &height);
1792 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1793
1794 if (target == 0) {
1795 /* examine dims */
1796 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1797 target = GLX_TEXTURE_2D_EXT;
1798 }
1799 else if ( _mesa_bitcount(width) == 1
1800 && _mesa_bitcount(height) == 1) {
1801 /* power of two size */
1802 if (height == 1) {
1803 target = GLX_TEXTURE_1D_EXT;
1804 }
1805 else {
1806 target = GLX_TEXTURE_2D_EXT;
1807 }
1808 }
1809 else if (ctx->Extensions.NV_texture_rectangle) {
1810 target = GLX_TEXTURE_RECTANGLE_EXT;
1811 }
1812 else {
1813 /* non power of two textures not supported */
1814 XMesaDestroyBuffer(b);
1815 return 0;
1816 }
1817 }
1818
1819 b->TextureTarget = target;
1820 b->TextureFormat = format;
1821 b->TextureMipmap = mipmap;
1822
1823 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1824 (XMesaDrawable) p, cmap)) {
1825 xmesa_free_buffer(b);
1826 return NULL;
1827 }
1828
1829 return b;
1830 }
1831
1832
1833
1834 XMesaBuffer
1835 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1836 unsigned int width, unsigned int height)
1837 {
1838 #ifndef XFree86Server
1839 XMesaWindow root;
1840 XMesaDrawable drawable; /* X Pixmap Drawable */
1841 XMesaBuffer b;
1842
1843 /* allocate pixmap for front buffer */
1844 root = RootWindow( v->display, v->visinfo->screen );
1845 drawable = XCreatePixmap(v->display, root, width, height,
1846 v->visinfo->depth);
1847 if (!drawable)
1848 return NULL;
1849
1850 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1851 if (!b)
1852 return NULL;
1853
1854 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1855 drawable, cmap)) {
1856 xmesa_free_buffer(b);
1857 return NULL;
1858 }
1859
1860 return b;
1861 #else
1862 return 0;
1863 #endif
1864 }
1865
1866
1867
1868 /*
1869 * Deallocate an XMesaBuffer structure and all related info.
1870 */
1871 PUBLIC void
1872 XMesaDestroyBuffer(XMesaBuffer b)
1873 {
1874 xmesa_free_buffer(b);
1875 }
1876
1877
1878 /**
1879 * Query the current window size and update the corresponding GLframebuffer
1880 * and all attached renderbuffers.
1881 * Called when:
1882 * 1. the first time a buffer is bound to a context.
1883 * 2. from glViewport to poll for window size changes
1884 * 3. from the XMesaResizeBuffers() API function.
1885 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1886 * when resizing a buffer when no rendering context is bound.
1887 */
1888 void
1889 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1890 {
1891 GLuint width, height;
1892 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1893 if (drawBuffer->mesa_buffer.Width != width ||
1894 drawBuffer->mesa_buffer.Height != height) {
1895 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
1896 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1897 }
1898 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1899 }
1900
1901
1902 /*
1903 * Bind buffer b to context c and make c the current rendering context.
1904 */
1905 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1906 {
1907 return XMesaMakeCurrent2( c, b, b );
1908 }
1909
1910
1911 /*
1912 * Bind buffer b to context c and make c the current rendering context.
1913 */
1914 PUBLIC
1915 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1916 XMesaBuffer readBuffer )
1917 {
1918 if (c) {
1919 if (!drawBuffer || !readBuffer)
1920 return GL_FALSE; /* must specify buffers! */
1921
1922 if (&(c->mesa) == _mesa_get_current_context()
1923 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1924 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1925 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1926 /* same context and buffer, do nothing */
1927 return GL_TRUE;
1928 }
1929
1930 c->xm_buffer = drawBuffer;
1931
1932 #ifdef FX
1933 if (FXmakeCurrent( drawBuffer ))
1934 return GL_TRUE;
1935 #endif
1936
1937 /* Call this periodically to detect when the user has begun using
1938 * GL rendering from multiple threads.
1939 */
1940 _glapi_check_multithread();
1941
1942 xmesa_check_and_update_buffer_size(c, drawBuffer);
1943 if (readBuffer != drawBuffer)
1944 xmesa_check_and_update_buffer_size(c, readBuffer);
1945
1946 _mesa_make_current(&(c->mesa),
1947 &drawBuffer->mesa_buffer,
1948 &readBuffer->mesa_buffer);
1949
1950 if (c->xm_visual->mesa_visual.rgbMode) {
1951 /*
1952 * Must recompute and set these pixel values because colormap
1953 * can be different for different windows.
1954 */
1955 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1956 c->clearcolor[0],
1957 c->clearcolor[1],
1958 c->clearcolor[2],
1959 c->clearcolor[3],
1960 c->xm_visual->undithered_pf);
1961 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1962 }
1963
1964 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1965 drawBuffer->wasCurrent = GL_TRUE;
1966 }
1967 else {
1968 /* Detach */
1969 _mesa_make_current( NULL, NULL, NULL );
1970 }
1971 return GL_TRUE;
1972 }
1973
1974
1975 /*
1976 * Unbind the context c from its buffer.
1977 */
1978 GLboolean XMesaUnbindContext( XMesaContext c )
1979 {
1980 /* A no-op for XFree86 integration purposes */
1981 return GL_TRUE;
1982 }
1983
1984
1985 XMesaContext XMesaGetCurrentContext( void )
1986 {
1987 GET_CURRENT_CONTEXT(ctx);
1988 if (ctx) {
1989 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1990 return xmesa;
1991 }
1992 else {
1993 return 0;
1994 }
1995 }
1996
1997
1998 XMesaBuffer XMesaGetCurrentBuffer( void )
1999 {
2000 GET_CURRENT_CONTEXT(ctx);
2001 if (ctx) {
2002 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
2003 return xmbuf;
2004 }
2005 else {
2006 return 0;
2007 }
2008 }
2009
2010
2011 /* New in Mesa 3.1 */
2012 XMesaBuffer XMesaGetCurrentReadBuffer( void )
2013 {
2014 GET_CURRENT_CONTEXT(ctx);
2015 if (ctx) {
2016 return XMESA_BUFFER(ctx->ReadBuffer);
2017 }
2018 else {
2019 return 0;
2020 }
2021 }
2022
2023
2024 #ifdef XFree86Server
2025 PUBLIC
2026 GLboolean XMesaForceCurrent(XMesaContext c)
2027 {
2028 if (c) {
2029 _glapi_set_dispatch(c->mesa.CurrentDispatch);
2030
2031 if (&(c->mesa) != _mesa_get_current_context()) {
2032 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer);
2033 }
2034 }
2035 else {
2036 _mesa_make_current(NULL, NULL, NULL);
2037 }
2038 return GL_TRUE;
2039 }
2040
2041
2042 PUBLIC
2043 GLboolean XMesaLoseCurrent(XMesaContext c)
2044 {
2045 (void) c;
2046 _mesa_make_current(NULL, NULL, NULL);
2047 return GL_TRUE;
2048 }
2049
2050
2051 PUBLIC
2052 GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask )
2053 {
2054 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
2055 return GL_TRUE;
2056 }
2057 #endif /* XFree86Server */
2058
2059
2060 #ifndef FX
2061 GLboolean XMesaSetFXmode( GLint mode )
2062 {
2063 (void) mode;
2064 return GL_FALSE;
2065 }
2066 #endif
2067
2068
2069
2070 /*
2071 * Copy the back buffer to the front buffer. If there's no back buffer
2072 * this is a no-op.
2073 */
2074 PUBLIC
2075 void XMesaSwapBuffers( XMesaBuffer b )
2076 {
2077 GET_CURRENT_CONTEXT(ctx);
2078
2079 if (!b->backxrb) {
2080 /* single buffered */
2081 return;
2082 }
2083
2084 /* If we're swapping the buffer associated with the current context
2085 * we have to flush any pending rendering commands first.
2086 */
2087 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2088 _mesa_notifySwapBuffers(ctx);
2089
2090 if (b->db_mode) {
2091 #ifdef FX
2092 if (FXswapBuffers(b))
2093 return;
2094 #endif
2095 if (b->backxrb->ximage) {
2096 /* Copy Ximage (back buf) from client memory to server window */
2097 #if defined(USE_XSHM) && !defined(XFree86Server)
2098 if (b->shm) {
2099 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2100 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2101 b->swapgc,
2102 b->backxrb->ximage, 0, 0,
2103 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2104 False );
2105 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2106 }
2107 else
2108 #endif
2109 {
2110 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2111 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2112 b->swapgc,
2113 b->backxrb->ximage, 0, 0,
2114 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
2115 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2116 }
2117 }
2118 else if (b->backxrb->pixmap) {
2119 /* Copy pixmap (back buf) to window (front buf) on server */
2120 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2121 XMesaCopyArea( b->xm_visual->display,
2122 b->backxrb->pixmap, /* source drawable */
2123 b->frontxrb->drawable, /* dest. drawable */
2124 b->swapgc,
2125 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2126 0, 0 /* dest region */
2127 );
2128 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2129 }
2130
2131 if (b->swAlpha)
2132 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer);
2133 }
2134 #if !defined(XFree86Server)
2135 XSync( b->xm_visual->display, False );
2136 #endif
2137 }
2138
2139
2140
2141 /*
2142 * Copy sub-region of back buffer to front buffer
2143 */
2144 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2145 {
2146 GET_CURRENT_CONTEXT(ctx);
2147
2148 /* If we're swapping the buffer associated with the current context
2149 * we have to flush any pending rendering commands first.
2150 */
2151 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2152 _mesa_notifySwapBuffers(ctx);
2153
2154 if (!b->backxrb) {
2155 /* single buffered */
2156 return;
2157 }
2158
2159 if (b->db_mode) {
2160 int yTop = b->mesa_buffer.Height - y - height;
2161 #ifdef FX
2162 if (FXswapBuffers(b))
2163 return;
2164 #endif
2165 if (b->backxrb->ximage) {
2166 /* Copy Ximage from host's memory to server's window */
2167 #if defined(USE_XSHM) && !defined(XFree86Server)
2168 if (b->shm) {
2169 /* XXX assuming width and height aren't too large! */
2170 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2171 b->swapgc,
2172 b->backxrb->ximage, x, yTop,
2173 x, yTop, width, height, False );
2174 /* wait for finished event??? */
2175 }
2176 else
2177 #endif
2178 {
2179 /* XXX assuming width and height aren't too large! */
2180 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2181 b->swapgc,
2182 b->backxrb->ximage, x, yTop,
2183 x, yTop, width, height );
2184 }
2185 }
2186 else {
2187 /* Copy pixmap to window on server */
2188 XMesaCopyArea( b->xm_visual->display,
2189 b->backxrb->pixmap, /* source drawable */
2190 b->frontxrb->drawable, /* dest. drawable */
2191 b->swapgc,
2192 x, yTop, width, height, /* source region */
2193 x, yTop /* dest region */
2194 );
2195 }
2196 }
2197 }
2198
2199
2200 /*
2201 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2202 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2203 * back buffer directly.
2204 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2205 * ximage - pointer to back buffer's XImage, or NULL
2206 * Return: GL_TRUE = context is double buffered
2207 * GL_FALSE = context is single buffered
2208 */
2209 #ifndef XFree86Server
2210 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2211 XMesaPixmap *pixmap,
2212 XMesaImage **ximage )
2213 {
2214 if (b->db_mode) {
2215 if (pixmap)
2216 *pixmap = b->backxrb->pixmap;
2217 if (ximage)
2218 *ximage = b->backxrb->ximage;
2219 return GL_TRUE;
2220 }
2221 else {
2222 *pixmap = 0;
2223 *ximage = NULL;
2224 return GL_FALSE;
2225 }
2226 }
2227 #endif /* XFree86Server */
2228
2229
2230 /*
2231 * Return the depth buffer associated with an XMesaBuffer.
2232 * Input: b - the XMesa buffer handle
2233 * Output: width, height - size of buffer in pixels
2234 * bytesPerValue - bytes per depth value (2 or 4)
2235 * buffer - pointer to depth buffer values
2236 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2237 */
2238 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2239 GLint *bytesPerValue, void **buffer )
2240 {
2241 struct gl_renderbuffer *rb
2242 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
2243 if (!rb || !rb->Data) {
2244 *width = 0;
2245 *height = 0;
2246 *bytesPerValue = 0;
2247 *buffer = 0;
2248 return GL_FALSE;
2249 }
2250 else {
2251 *width = b->mesa_buffer.Width;
2252 *height = b->mesa_buffer.Height;
2253 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
2254 ? sizeof(GLushort) : sizeof(GLuint);
2255 *buffer = rb->Data;
2256 return GL_TRUE;
2257 }
2258 }
2259
2260
2261 void XMesaFlush( XMesaContext c )
2262 {
2263 if (c && c->xm_visual) {
2264 #ifdef XFree86Server
2265 /* NOT_NEEDED */
2266 #else
2267 XSync( c->xm_visual->display, False );
2268 #endif
2269 }
2270 }
2271
2272
2273
2274 const char *XMesaGetString( XMesaContext c, int name )
2275 {
2276 (void) c;
2277 if (name==XMESA_VERSION) {
2278 return "5.0";
2279 }
2280 else if (name==XMESA_EXTENSIONS) {
2281 return "";
2282 }
2283 else {
2284 return NULL;
2285 }
2286 }
2287
2288
2289
2290 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2291 {
2292 XMesaBuffer b;
2293 for (b=XMesaBufferList; b; b=b->Next) {
2294 if (b->frontxrb->drawable == d && b->display == dpy) {
2295 return b;
2296 }
2297 }
2298 return NULL;
2299 }
2300
2301
2302 /**
2303 * Free/destroy all XMesaBuffers associated with given display.
2304 */
2305 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
2306 {
2307 XMesaBuffer b, next;
2308 for (b = XMesaBufferList; b; b = next) {
2309 next = b->Next;
2310 if (b->display == dpy) {
2311 xmesa_free_buffer(b);
2312 }
2313 }
2314 }
2315
2316
2317 /*
2318 * Look for XMesaBuffers whose X window has been destroyed.
2319 * Deallocate any such XMesaBuffers.
2320 */
2321 void XMesaGarbageCollect( void )
2322 {
2323 XMesaBuffer b, next;
2324 for (b=XMesaBufferList; b; b=next) {
2325 next = b->Next;
2326 if (b->display && b->frontxrb->drawable && b->type == WINDOW) {
2327 #ifdef XFree86Server
2328 /* NOT_NEEDED */
2329 #else
2330 XSync(b->display, False);
2331 if (!window_exists( b->display, b->frontxrb->drawable )) {
2332 /* found a dead window, free the ancillary info */
2333 XMesaDestroyBuffer( b );
2334 }
2335 #endif
2336 }
2337 }
2338 }
2339
2340
2341 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2342 GLfloat red, GLfloat green,
2343 GLfloat blue, GLfloat alpha )
2344 {
2345 GLcontext *ctx = &xmesa->mesa;
2346 GLint r = (GLint) (red * 255.0F);
2347 GLint g = (GLint) (green * 255.0F);
2348 GLint b = (GLint) (blue * 255.0F);
2349 GLint a = (GLint) (alpha * 255.0F);
2350
2351 switch (xmesa->pixelformat) {
2352 case PF_Index:
2353 return 0;
2354 case PF_Truecolor:
2355 {
2356 unsigned long p;
2357 PACK_TRUECOLOR( p, r, g, b );
2358 return p;
2359 }
2360 case PF_8A8B8G8R:
2361 return PACK_8A8B8G8R( r, g, b, a );
2362 case PF_8A8R8G8B:
2363 return PACK_8A8R8G8B( r, g, b, a );
2364 case PF_8R8G8B:
2365 return PACK_8R8G8B( r, g, b );
2366 case PF_5R6G5B:
2367 return PACK_5R6G5B( r, g, b );
2368 case PF_Dither:
2369 {
2370 DITHER_SETUP;
2371 return DITHER( x, y, r, g, b );
2372 }
2373 case PF_1Bit:
2374 /* 382 = (3*255)/2 */
2375 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2376 case PF_HPCR:
2377 return DITHER_HPCR(x, y, r, g, b);
2378 case PF_Lookup:
2379 {
2380 LOOKUP_SETUP;
2381 return LOOKUP( r, g, b );
2382 }
2383 case PF_Grayscale:
2384 return GRAY_RGB( r, g, b );
2385 case PF_Dither_5R6G5B:
2386 /* fall through */
2387 case PF_Dither_True:
2388 {
2389 unsigned long p;
2390 PACK_TRUEDITHER(p, x, y, r, g, b);
2391 return p;
2392 }
2393 default:
2394 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
2395 }
2396 return 0;
2397 }
2398
2399
2400 /*
2401 * This is typically called when the window size changes and we need
2402 * to reallocate the buffer's back/depth/stencil/accum buffers.
2403 */
2404 PUBLIC void
2405 XMesaResizeBuffers( XMesaBuffer b )
2406 {
2407 GET_CURRENT_CONTEXT(ctx);
2408 XMesaContext xmctx = XMESA_CONTEXT(ctx);
2409 if (!xmctx)
2410 return;
2411 xmesa_check_and_update_buffer_size(xmctx, b);
2412 }
2413
2414
2415 static GLint
2416 xbuffer_to_renderbuffer(int buffer)
2417 {
2418 assert(MAX_AUX_BUFFERS <= 4);
2419
2420 switch (buffer) {
2421 case GLX_FRONT_LEFT_EXT:
2422 return BUFFER_FRONT_LEFT;
2423 case GLX_FRONT_RIGHT_EXT:
2424 return BUFFER_FRONT_RIGHT;
2425 case GLX_BACK_LEFT_EXT:
2426 return BUFFER_BACK_LEFT;
2427 case GLX_BACK_RIGHT_EXT:
2428 return BUFFER_BACK_RIGHT;
2429 case GLX_AUX0_EXT:
2430 return BUFFER_AUX0;
2431 case GLX_AUX1_EXT:
2432 case GLX_AUX2_EXT:
2433 case GLX_AUX3_EXT:
2434 case GLX_AUX4_EXT:
2435 case GLX_AUX5_EXT:
2436 case GLX_AUX6_EXT:
2437 case GLX_AUX7_EXT:
2438 case GLX_AUX8_EXT:
2439 case GLX_AUX9_EXT:
2440 default:
2441 /* BadValue error */
2442 return -1;
2443 }
2444 }
2445
2446
2447 PUBLIC void
2448 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
2449 const int *attrib_list)
2450 {
2451 #if 0
2452 GET_CURRENT_CONTEXT(ctx);
2453 const GLuint unit = ctx->Texture.CurrentUnit;
2454 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
2455 struct gl_texture_object *texObj;
2456 #endif
2457 struct gl_renderbuffer *rb;
2458 struct xmesa_renderbuffer *xrb;
2459 GLint b;
2460 XMesaImage *img = NULL;
2461 GLboolean freeImg = GL_FALSE;
2462
2463 b = xbuffer_to_renderbuffer(buffer);
2464 if (b < 0)
2465 return;
2466
2467 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
2468 return; /* BadMatch error */
2469
2470 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
2471 if (!rb) {
2472 /* invalid buffer */
2473 return;
2474 }
2475 xrb = xmesa_renderbuffer(rb);
2476
2477 #if 0
2478 switch (drawable->TextureTarget) {
2479 case GLX_TEXTURE_1D_EXT:
2480 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
2481 break;
2482 case GLX_TEXTURE_2D_EXT:
2483 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
2484 break;
2485 case GLX_TEXTURE_RECTANGLE_EXT:
2486 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
2487 break;
2488 default:
2489 return; /* BadMatch error */
2490 }
2491 #endif
2492
2493 /*
2494 * The following is a quick and simple way to implement
2495 * BindTexImage. The better way is to write some new FetchTexel()
2496 * functions which would extract texels from XImages. We'd still
2497 * need to use GetImage when texturing from a Pixmap (front buffer)
2498 * but texturing from a back buffer (XImage) would avoid an image
2499 * copy.
2500 */
2501
2502 /* get XImage */
2503 if (xrb->pixmap) {
2504 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
2505 ZPixmap);
2506 freeImg = GL_TRUE;
2507 }
2508 else if (xrb->ximage) {
2509 img = xrb->ximage;
2510 }
2511
2512 /* store the XImage as a new texture image */
2513 if (img) {
2514 GLenum format, type, intFormat;
2515 if (img->bits_per_pixel == 32) {
2516 format = GL_BGRA;
2517 type = GL_UNSIGNED_BYTE;
2518 intFormat = GL_RGBA;
2519 }
2520 else if (img->bits_per_pixel == 24) {
2521 format = GL_BGR;
2522 type = GL_UNSIGNED_BYTE;
2523 intFormat = GL_RGB;
2524 }
2525 else if (img->bits_per_pixel == 16) {
2526 format = GL_BGR;
2527 type = GL_UNSIGNED_SHORT_5_6_5;
2528 intFormat = GL_RGB;
2529 }
2530 else {
2531 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
2532 return;
2533 }
2534 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2535 intFormat = GL_RGBA;
2536 }
2537 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
2538 intFormat = GL_RGB;
2539 }
2540
2541 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
2542 format, type, img->data);
2543
2544 if (freeImg) {
2545 XMesaDestroyImage(img);
2546 }
2547 }
2548 }
2549
2550
2551
2552 PUBLIC void
2553 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
2554 {
2555 const GLint b = xbuffer_to_renderbuffer(buffer);
2556 if (b < 0)
2557 return;
2558
2559 /* no-op for now */
2560 }
2561