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Merge commit 'origin/master' into gallium-0.2
[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_unreference_framebuffer(&fb);
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_IBM_multimode_draw_arrays
1329 #define need_GL_MESA_resize_buffers
1330 #define need_GL_NV_vertex_program
1331 #define need_GL_NV_fragment_program
1332
1333 #include "extension_helper.h"
1334 #include "utils.h"
1335
1336 const struct dri_extension card_extensions[] =
1337 {
1338 { "GL_VERSION_1_3", GL_VERSION_1_3_functions },
1339 { "GL_VERSION_1_4", GL_VERSION_1_4_functions },
1340 { "GL_VERSION_1_5", GL_VERSION_1_5_functions },
1341 { "GL_VERSION_2_0", GL_VERSION_2_0_functions },
1342
1343 { "GL_EXT_blend_color", GL_EXT_blend_color_functions },
1344 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions },
1345 { "GL_EXT_convolution", GL_EXT_convolution_functions },
1346 { "GL_EXT_histogram", GL_EXT_histogram_functions },
1347 { "GL_SGI_color_table", GL_SGI_color_table_functions },
1348
1349 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
1350 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
1351 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
1352 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
1353 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
1354 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
1355 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
1356 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
1357 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
1358 { "GL_IBM_multimode_draw_arrays", GL_IBM_multimode_draw_arrays_functions },
1359 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
1360 { "GL_NV_vertex_program", GL_NV_vertex_program_functions },
1361 { "GL_NV_fragment_program", GL_NV_fragment_program_functions },
1362 { NULL, NULL }
1363 };
1364 #endif
1365
1366 /*
1367 * Create a new X/Mesa visual.
1368 * Input: display - X11 display
1369 * visinfo - an XVisualInfo pointer
1370 * rgb_flag - GL_TRUE = RGB mode,
1371 * GL_FALSE = color index mode
1372 * alpha_flag - alpha buffer requested?
1373 * db_flag - GL_TRUE = double-buffered,
1374 * GL_FALSE = single buffered
1375 * stereo_flag - stereo visual?
1376 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1377 * GL_FALSE = use an off-screen pixmap for back buffer
1378 * depth_size - requested bits/depth values, or zero
1379 * stencil_size - requested bits/stencil values, or zero
1380 * accum_red_size - requested bits/red accum values, or zero
1381 * accum_green_size - requested bits/green accum values, or zero
1382 * accum_blue_size - requested bits/blue accum values, or zero
1383 * accum_alpha_size - requested bits/alpha accum values, or zero
1384 * num_samples - number of samples/pixel if multisampling, or zero
1385 * level - visual level, usually 0
1386 * visualCaveat - ala the GLX extension, usually GLX_NONE
1387 * Return; a new XMesaVisual or 0 if error.
1388 */
1389 PUBLIC
1390 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1391 XMesaVisualInfo visinfo,
1392 GLboolean rgb_flag,
1393 GLboolean alpha_flag,
1394 GLboolean db_flag,
1395 GLboolean stereo_flag,
1396 GLboolean ximage_flag,
1397 GLint depth_size,
1398 GLint stencil_size,
1399 GLint accum_red_size,
1400 GLint accum_green_size,
1401 GLint accum_blue_size,
1402 GLint accum_alpha_size,
1403 GLint num_samples,
1404 GLint level,
1405 GLint visualCaveat )
1406 {
1407 char *gamma;
1408 XMesaVisual v;
1409 GLint red_bits, green_bits, blue_bits, alpha_bits;
1410
1411 #ifdef IN_DRI_DRIVER
1412 /* driInitExtensions() should be called once per screen to setup extension
1413 * indices. There is no need to call it when the context is created since
1414 * XMesa enables mesa sw extensions on its own.
1415 */
1416 driInitExtensions( NULL, card_extensions, GL_FALSE );
1417 #endif
1418
1419 #ifndef XFree86Server
1420 /* For debugging only */
1421 if (_mesa_getenv("MESA_XSYNC")) {
1422 /* This makes debugging X easier.
1423 * In your debugger, set a breakpoint on _XError to stop when an
1424 * X protocol error is generated.
1425 */
1426 XSynchronize( display, 1 );
1427 }
1428 #endif
1429
1430 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1431 if (!v) {
1432 return NULL;
1433 }
1434
1435 v->display = display;
1436
1437 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1438 * the struct but we may need some of the information contained in it
1439 * at a later time.
1440 */
1441 #ifndef XFree86Server
1442 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1443 if(!v->visinfo) {
1444 _mesa_free(v);
1445 return NULL;
1446 }
1447 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1448 #endif
1449
1450 /* check for MESA_GAMMA environment variable */
1451 gamma = _mesa_getenv("MESA_GAMMA");
1452 if (gamma) {
1453 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1454 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1455 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1456 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1457 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1458 }
1459 else {
1460 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1461 }
1462
1463 v->ximage_flag = ximage_flag;
1464
1465 #ifdef XFree86Server
1466 /* We could calculate these values by ourselves. nplanes is either the sum
1467 * of the red, green, and blue bits or the number index bits.
1468 * ColormapEntries is either (1U << index_bits) or
1469 * (1U << max(redBits, greenBits, blueBits)).
1470 */
1471 assert(visinfo->nplanes > 0);
1472 v->nplanes = visinfo->nplanes;
1473 v->ColormapEntries = visinfo->ColormapEntries;
1474
1475 v->mesa_visual.redMask = visinfo->redMask;
1476 v->mesa_visual.greenMask = visinfo->greenMask;
1477 v->mesa_visual.blueMask = visinfo->blueMask;
1478 v->mesa_visual.visualID = visinfo->vid;
1479 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */
1480 #else
1481 v->mesa_visual.redMask = visinfo->red_mask;
1482 v->mesa_visual.greenMask = visinfo->green_mask;
1483 v->mesa_visual.blueMask = visinfo->blue_mask;
1484 v->mesa_visual.visualID = visinfo->visualid;
1485 v->mesa_visual.screen = visinfo->screen;
1486 #endif
1487
1488 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1489 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
1490 #else
1491 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
1492 #endif
1493
1494 v->mesa_visual.visualRating = visualCaveat;
1495
1496 if (alpha_flag)
1497 v->mesa_visual.alphaBits = 8;
1498
1499 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
1500
1501 {
1502 const int xclass = v->mesa_visual.visualType;
1503 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1504 red_bits = _mesa_bitcount(GET_REDMASK(v));
1505 green_bits = _mesa_bitcount(GET_GREENMASK(v));
1506 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
1507 }
1508 else {
1509 /* this is an approximation */
1510 int depth;
1511 depth = GET_VISUAL_DEPTH(v);
1512 red_bits = depth / 3;
1513 depth -= red_bits;
1514 green_bits = depth / 2;
1515 depth -= green_bits;
1516 blue_bits = depth;
1517 alpha_bits = 0;
1518 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1519 }
1520 alpha_bits = v->mesa_visual.alphaBits;
1521 }
1522
1523 _mesa_initialize_visual( &v->mesa_visual,
1524 rgb_flag, db_flag, stereo_flag,
1525 red_bits, green_bits,
1526 blue_bits, alpha_bits,
1527 v->mesa_visual.indexBits,
1528 depth_size,
1529 stencil_size,
1530 accum_red_size, accum_green_size,
1531 accum_blue_size, accum_alpha_size,
1532 0 );
1533
1534 /* XXX minor hack */
1535 v->mesa_visual.level = level;
1536 return v;
1537 }
1538
1539
1540 PUBLIC
1541 void XMesaDestroyVisual( XMesaVisual v )
1542 {
1543 #ifndef XFree86Server
1544 _mesa_free(v->visinfo);
1545 #endif
1546 _mesa_free(v);
1547 }
1548
1549
1550
1551 /**
1552 * Create a new XMesaContext.
1553 * \param v the XMesaVisual
1554 * \param share_list another XMesaContext with which to share display
1555 * lists or NULL if no sharing is wanted.
1556 * \return an XMesaContext or NULL if error.
1557 */
1558 PUBLIC
1559 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1560 {
1561 static GLboolean firstTime = GL_TRUE;
1562 XMesaContext c;
1563 GLcontext *mesaCtx;
1564 struct dd_function_table functions;
1565 TNLcontext *tnl;
1566
1567 if (firstTime) {
1568 _glthread_INIT_MUTEX(_xmesa_lock);
1569 firstTime = GL_FALSE;
1570 }
1571
1572 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1573 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1574 if (!c)
1575 return NULL;
1576
1577 mesaCtx = &(c->mesa);
1578
1579 /* initialize with default driver functions, then plug in XMesa funcs */
1580 _mesa_init_driver_functions(&functions);
1581 xmesa_init_driver_functions(v, &functions);
1582 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
1583 share_list ? &(share_list->mesa) : (GLcontext *) NULL,
1584 &functions, (void *) c)) {
1585 _mesa_free(c);
1586 return NULL;
1587 }
1588
1589 _mesa_enable_sw_extensions(mesaCtx);
1590 _mesa_enable_1_3_extensions(mesaCtx);
1591 _mesa_enable_1_4_extensions(mesaCtx);
1592 _mesa_enable_1_5_extensions(mesaCtx);
1593 _mesa_enable_2_0_extensions(mesaCtx);
1594 _mesa_enable_2_1_extensions(mesaCtx);
1595 #if ENABLE_EXT_texure_compression_s3tc
1596 if (mesaCtx->Mesa_DXTn) {
1597 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
1598 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
1599 }
1600 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
1601 #endif
1602 #if ENABLE_EXT_timer_query
1603 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
1604 #endif
1605
1606 #ifdef XFree86Server
1607 /* If we're running in the X server, do bounds checking to prevent
1608 * segfaults and server crashes!
1609 */
1610 mesaCtx->Const.CheckArrayBounds = GL_TRUE;
1611 #endif
1612
1613 /* finish up xmesa context initializations */
1614 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
1615 c->xm_visual = v;
1616 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1617 c->display = v->display;
1618 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1619
1620 /* Initialize the software rasterizer and helper modules.
1621 */
1622 if (!_swrast_CreateContext( mesaCtx ) ||
1623 !_vbo_CreateContext( mesaCtx ) ||
1624 !_tnl_CreateContext( mesaCtx ) ||
1625 !_swsetup_CreateContext( mesaCtx )) {
1626 _mesa_free_context_data(&c->mesa);
1627 _mesa_free(c);
1628 return NULL;
1629 }
1630
1631 /* tnl setup */
1632 tnl = TNL_CONTEXT(mesaCtx);
1633 tnl->Driver.RunPipeline = _tnl_run_pipeline;
1634 /* swrast setup */
1635 xmesa_register_swrast_functions( mesaCtx );
1636 _swsetup_Wakeup(mesaCtx);
1637
1638 return c;
1639 }
1640
1641
1642
1643 PUBLIC
1644 void XMesaDestroyContext( XMesaContext c )
1645 {
1646 GLcontext *mesaCtx = &c->mesa;
1647
1648 #ifdef FX
1649 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) );
1650 #endif
1651
1652 _swsetup_DestroyContext( mesaCtx );
1653 _swrast_DestroyContext( mesaCtx );
1654 _tnl_DestroyContext( mesaCtx );
1655 _vbo_DestroyContext( mesaCtx );
1656 _mesa_free_context_data( mesaCtx );
1657 _mesa_free( c );
1658 }
1659
1660
1661
1662 /**
1663 * Private function for creating an XMesaBuffer which corresponds to an
1664 * X window or pixmap.
1665 * \param v the window's XMesaVisual
1666 * \param w the window we're wrapping
1667 * \return new XMesaBuffer or NULL if error
1668 */
1669 PUBLIC XMesaBuffer
1670 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
1671 {
1672 #ifndef XFree86Server
1673 XWindowAttributes attr;
1674 #endif
1675 XMesaBuffer b;
1676 XMesaColormap cmap;
1677 int depth;
1678
1679 assert(v);
1680 assert(w);
1681
1682 /* Check that window depth matches visual depth */
1683 #ifdef XFree86Server
1684 depth = ((XMesaDrawable)w)->depth;
1685 #else
1686 XGetWindowAttributes( v->display, w, &attr );
1687 depth = attr.depth;
1688 #endif
1689 if (GET_VISUAL_DEPTH(v) != depth) {
1690 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1691 GET_VISUAL_DEPTH(v), depth);
1692 return NULL;
1693 }
1694
1695 /* Find colormap */
1696 #ifdef XFree86Server
1697 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1698 #else
1699 if (attr.colormap) {
1700 cmap = attr.colormap;
1701 }
1702 else {
1703 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1704 /* this is weird, a window w/out a colormap!? */
1705 /* OK, let's just allocate a new one and hope for the best */
1706 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1707 }
1708 #endif
1709
1710 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1711 if (!b)
1712 return NULL;
1713
1714 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1715 (XMesaDrawable) w, cmap )) {
1716 xmesa_free_buffer(b);
1717 return NULL;
1718 }
1719
1720 return b;
1721 }
1722
1723
1724
1725 /**
1726 * Create a new XMesaBuffer from an X pixmap.
1727 *
1728 * \param v the XMesaVisual
1729 * \param p the pixmap
1730 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1731 * \c GLX_DIRECT_COLOR visual for the pixmap
1732 * \returns new XMesaBuffer or NULL if error
1733 */
1734 PUBLIC XMesaBuffer
1735 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1736 {
1737 XMesaBuffer b;
1738
1739 assert(v);
1740
1741 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1742 if (!b)
1743 return NULL;
1744
1745 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1746 (XMesaDrawable) p, cmap)) {
1747 xmesa_free_buffer(b);
1748 return NULL;
1749 }
1750
1751 return b;
1752 }
1753
1754
1755 /**
1756 * For GLX_EXT_texture_from_pixmap
1757 */
1758 XMesaBuffer
1759 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1760 XMesaColormap cmap,
1761 int format, int target, int mipmap)
1762 {
1763 GET_CURRENT_CONTEXT(ctx);
1764 XMesaBuffer b;
1765 GLuint width, height;
1766
1767 assert(v);
1768
1769 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1770 if (!b)
1771 return NULL;
1772
1773 /* get pixmap size, update framebuffer/renderbuffer dims */
1774 xmesa_get_window_size(v->display, b, &width, &height);
1775 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1776
1777 if (target == 0) {
1778 /* examine dims */
1779 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1780 target = GLX_TEXTURE_2D_EXT;
1781 }
1782 else if ( _mesa_bitcount(width) == 1
1783 && _mesa_bitcount(height) == 1) {
1784 /* power of two size */
1785 if (height == 1) {
1786 target = GLX_TEXTURE_1D_EXT;
1787 }
1788 else {
1789 target = GLX_TEXTURE_2D_EXT;
1790 }
1791 }
1792 else if (ctx->Extensions.NV_texture_rectangle) {
1793 target = GLX_TEXTURE_RECTANGLE_EXT;
1794 }
1795 else {
1796 /* non power of two textures not supported */
1797 XMesaDestroyBuffer(b);
1798 return 0;
1799 }
1800 }
1801
1802 b->TextureTarget = target;
1803 b->TextureFormat = format;
1804 b->TextureMipmap = mipmap;
1805
1806 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1807 (XMesaDrawable) p, cmap)) {
1808 xmesa_free_buffer(b);
1809 return NULL;
1810 }
1811
1812 return b;
1813 }
1814
1815
1816
1817 XMesaBuffer
1818 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1819 unsigned int width, unsigned int height)
1820 {
1821 #ifndef XFree86Server
1822 XMesaWindow root;
1823 XMesaDrawable drawable; /* X Pixmap Drawable */
1824 XMesaBuffer b;
1825
1826 /* allocate pixmap for front buffer */
1827 root = RootWindow( v->display, v->visinfo->screen );
1828 drawable = XCreatePixmap(v->display, root, width, height,
1829 v->visinfo->depth);
1830 if (!drawable)
1831 return NULL;
1832
1833 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1834 if (!b)
1835 return NULL;
1836
1837 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1838 drawable, cmap)) {
1839 xmesa_free_buffer(b);
1840 return NULL;
1841 }
1842
1843 return b;
1844 #else
1845 return 0;
1846 #endif
1847 }
1848
1849
1850
1851 /*
1852 * Deallocate an XMesaBuffer structure and all related info.
1853 */
1854 PUBLIC void
1855 XMesaDestroyBuffer(XMesaBuffer b)
1856 {
1857 xmesa_free_buffer(b);
1858 }
1859
1860
1861 /**
1862 * Query the current window size and update the corresponding GLframebuffer
1863 * and all attached renderbuffers.
1864 * Called when:
1865 * 1. the first time a buffer is bound to a context.
1866 * 2. from glViewport to poll for window size changes
1867 * 3. from the XMesaResizeBuffers() API function.
1868 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1869 * when resizing a buffer when no rendering context is bound.
1870 */
1871 void
1872 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1873 {
1874 GLuint width, height;
1875 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1876 if (drawBuffer->mesa_buffer.Width != width ||
1877 drawBuffer->mesa_buffer.Height != height) {
1878 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
1879 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1880 }
1881 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1882 }
1883
1884
1885 /*
1886 * Bind buffer b to context c and make c the current rendering context.
1887 */
1888 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1889 {
1890 return XMesaMakeCurrent2( c, b, b );
1891 }
1892
1893
1894 /*
1895 * Bind buffer b to context c and make c the current rendering context.
1896 */
1897 PUBLIC
1898 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1899 XMesaBuffer readBuffer )
1900 {
1901 if (c) {
1902 if (!drawBuffer || !readBuffer)
1903 return GL_FALSE; /* must specify buffers! */
1904
1905 if (&(c->mesa) == _mesa_get_current_context()
1906 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1907 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1908 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1909 /* same context and buffer, do nothing */
1910 return GL_TRUE;
1911 }
1912
1913 c->xm_buffer = drawBuffer;
1914
1915 #ifdef FX
1916 if (FXmakeCurrent( drawBuffer ))
1917 return GL_TRUE;
1918 #endif
1919
1920 /* Call this periodically to detect when the user has begun using
1921 * GL rendering from multiple threads.
1922 */
1923 _glapi_check_multithread();
1924
1925 xmesa_check_and_update_buffer_size(c, drawBuffer);
1926 if (readBuffer != drawBuffer)
1927 xmesa_check_and_update_buffer_size(c, readBuffer);
1928
1929 _mesa_make_current(&(c->mesa),
1930 &drawBuffer->mesa_buffer,
1931 &readBuffer->mesa_buffer);
1932
1933 if (c->xm_visual->mesa_visual.rgbMode) {
1934 /*
1935 * Must recompute and set these pixel values because colormap
1936 * can be different for different windows.
1937 */
1938 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1939 c->clearcolor[0],
1940 c->clearcolor[1],
1941 c->clearcolor[2],
1942 c->clearcolor[3],
1943 c->xm_visual->undithered_pf);
1944 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1945 }
1946
1947 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1948 drawBuffer->wasCurrent = GL_TRUE;
1949 }
1950 else {
1951 /* Detach */
1952 _mesa_make_current( NULL, NULL, NULL );
1953 }
1954 return GL_TRUE;
1955 }
1956
1957
1958 /*
1959 * Unbind the context c from its buffer.
1960 */
1961 GLboolean XMesaUnbindContext( XMesaContext c )
1962 {
1963 /* A no-op for XFree86 integration purposes */
1964 return GL_TRUE;
1965 }
1966
1967
1968 XMesaContext XMesaGetCurrentContext( void )
1969 {
1970 GET_CURRENT_CONTEXT(ctx);
1971 if (ctx) {
1972 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1973 return xmesa;
1974 }
1975 else {
1976 return 0;
1977 }
1978 }
1979
1980
1981 XMesaBuffer XMesaGetCurrentBuffer( void )
1982 {
1983 GET_CURRENT_CONTEXT(ctx);
1984 if (ctx) {
1985 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
1986 return xmbuf;
1987 }
1988 else {
1989 return 0;
1990 }
1991 }
1992
1993
1994 /* New in Mesa 3.1 */
1995 XMesaBuffer XMesaGetCurrentReadBuffer( void )
1996 {
1997 GET_CURRENT_CONTEXT(ctx);
1998 if (ctx) {
1999 return XMESA_BUFFER(ctx->ReadBuffer);
2000 }
2001 else {
2002 return 0;
2003 }
2004 }
2005
2006
2007 #ifdef XFree86Server
2008 PUBLIC
2009 GLboolean XMesaForceCurrent(XMesaContext c)
2010 {
2011 if (c) {
2012 _glapi_set_dispatch(c->mesa.CurrentDispatch);
2013
2014 if (&(c->mesa) != _mesa_get_current_context()) {
2015 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer);
2016 }
2017 }
2018 else {
2019 _mesa_make_current(NULL, NULL, NULL);
2020 }
2021 return GL_TRUE;
2022 }
2023
2024
2025 PUBLIC
2026 GLboolean XMesaLoseCurrent(XMesaContext c)
2027 {
2028 (void) c;
2029 _mesa_make_current(NULL, NULL, NULL);
2030 return GL_TRUE;
2031 }
2032
2033
2034 PUBLIC
2035 GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask )
2036 {
2037 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
2038 return GL_TRUE;
2039 }
2040 #endif /* XFree86Server */
2041
2042
2043 #ifndef FX
2044 GLboolean XMesaSetFXmode( GLint mode )
2045 {
2046 (void) mode;
2047 return GL_FALSE;
2048 }
2049 #endif
2050
2051
2052
2053 /*
2054 * Copy the back buffer to the front buffer. If there's no back buffer
2055 * this is a no-op.
2056 */
2057 PUBLIC
2058 void XMesaSwapBuffers( XMesaBuffer b )
2059 {
2060 GET_CURRENT_CONTEXT(ctx);
2061
2062 if (!b->backxrb) {
2063 /* single buffered */
2064 return;
2065 }
2066
2067 /* If we're swapping the buffer associated with the current context
2068 * we have to flush any pending rendering commands first.
2069 */
2070 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2071 _mesa_notifySwapBuffers(ctx);
2072
2073 if (b->db_mode) {
2074 #ifdef FX
2075 if (FXswapBuffers(b))
2076 return;
2077 #endif
2078 if (b->backxrb->ximage) {
2079 /* Copy Ximage (back buf) from client memory to server window */
2080 #if defined(USE_XSHM) && !defined(XFree86Server)
2081 if (b->shm) {
2082 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2083 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2084 b->swapgc,
2085 b->backxrb->ximage, 0, 0,
2086 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2087 False );
2088 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2089 }
2090 else
2091 #endif
2092 {
2093 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2094 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2095 b->swapgc,
2096 b->backxrb->ximage, 0, 0,
2097 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
2098 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2099 }
2100 }
2101 else if (b->backxrb->pixmap) {
2102 /* Copy pixmap (back buf) to window (front buf) on server */
2103 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2104 XMesaCopyArea( b->xm_visual->display,
2105 b->backxrb->pixmap, /* source drawable */
2106 b->frontxrb->drawable, /* dest. drawable */
2107 b->swapgc,
2108 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2109 0, 0 /* dest region */
2110 );
2111 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2112 }
2113
2114 if (b->swAlpha)
2115 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer);
2116 }
2117 #if !defined(XFree86Server)
2118 XSync( b->xm_visual->display, False );
2119 #endif
2120 }
2121
2122
2123
2124 /*
2125 * Copy sub-region of back buffer to front buffer
2126 */
2127 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2128 {
2129 GET_CURRENT_CONTEXT(ctx);
2130
2131 /* If we're swapping the buffer associated with the current context
2132 * we have to flush any pending rendering commands first.
2133 */
2134 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2135 _mesa_notifySwapBuffers(ctx);
2136
2137 if (!b->backxrb) {
2138 /* single buffered */
2139 return;
2140 }
2141
2142 if (b->db_mode) {
2143 int yTop = b->mesa_buffer.Height - y - height;
2144 #ifdef FX
2145 if (FXswapBuffers(b))
2146 return;
2147 #endif
2148 if (b->backxrb->ximage) {
2149 /* Copy Ximage from host's memory to server's window */
2150 #if defined(USE_XSHM) && !defined(XFree86Server)
2151 if (b->shm) {
2152 /* XXX assuming width and height aren't too large! */
2153 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2154 b->swapgc,
2155 b->backxrb->ximage, x, yTop,
2156 x, yTop, width, height, False );
2157 /* wait for finished event??? */
2158 }
2159 else
2160 #endif
2161 {
2162 /* XXX assuming width and height aren't too large! */
2163 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2164 b->swapgc,
2165 b->backxrb->ximage, x, yTop,
2166 x, yTop, width, height );
2167 }
2168 }
2169 else {
2170 /* Copy pixmap to window on server */
2171 XMesaCopyArea( b->xm_visual->display,
2172 b->backxrb->pixmap, /* source drawable */
2173 b->frontxrb->drawable, /* dest. drawable */
2174 b->swapgc,
2175 x, yTop, width, height, /* source region */
2176 x, yTop /* dest region */
2177 );
2178 }
2179 }
2180 }
2181
2182
2183 /*
2184 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2185 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2186 * back buffer directly.
2187 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2188 * ximage - pointer to back buffer's XImage, or NULL
2189 * Return: GL_TRUE = context is double buffered
2190 * GL_FALSE = context is single buffered
2191 */
2192 #ifndef XFree86Server
2193 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2194 XMesaPixmap *pixmap,
2195 XMesaImage **ximage )
2196 {
2197 if (b->db_mode) {
2198 if (pixmap)
2199 *pixmap = b->backxrb->pixmap;
2200 if (ximage)
2201 *ximage = b->backxrb->ximage;
2202 return GL_TRUE;
2203 }
2204 else {
2205 *pixmap = 0;
2206 *ximage = NULL;
2207 return GL_FALSE;
2208 }
2209 }
2210 #endif /* XFree86Server */
2211
2212
2213 /*
2214 * Return the depth buffer associated with an XMesaBuffer.
2215 * Input: b - the XMesa buffer handle
2216 * Output: width, height - size of buffer in pixels
2217 * bytesPerValue - bytes per depth value (2 or 4)
2218 * buffer - pointer to depth buffer values
2219 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2220 */
2221 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2222 GLint *bytesPerValue, void **buffer )
2223 {
2224 struct gl_renderbuffer *rb
2225 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
2226 if (!rb || !rb->Data) {
2227 *width = 0;
2228 *height = 0;
2229 *bytesPerValue = 0;
2230 *buffer = 0;
2231 return GL_FALSE;
2232 }
2233 else {
2234 *width = b->mesa_buffer.Width;
2235 *height = b->mesa_buffer.Height;
2236 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
2237 ? sizeof(GLushort) : sizeof(GLuint);
2238 *buffer = rb->Data;
2239 return GL_TRUE;
2240 }
2241 }
2242
2243
2244 void XMesaFlush( XMesaContext c )
2245 {
2246 if (c && c->xm_visual) {
2247 #ifdef XFree86Server
2248 /* NOT_NEEDED */
2249 #else
2250 XSync( c->xm_visual->display, False );
2251 #endif
2252 }
2253 }
2254
2255
2256
2257 const char *XMesaGetString( XMesaContext c, int name )
2258 {
2259 (void) c;
2260 if (name==XMESA_VERSION) {
2261 return "5.0";
2262 }
2263 else if (name==XMESA_EXTENSIONS) {
2264 return "";
2265 }
2266 else {
2267 return NULL;
2268 }
2269 }
2270
2271
2272
2273 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2274 {
2275 XMesaBuffer b;
2276 for (b=XMesaBufferList; b; b=b->Next) {
2277 if (b->frontxrb->drawable == d && b->display == dpy) {
2278 return b;
2279 }
2280 }
2281 return NULL;
2282 }
2283
2284
2285 /**
2286 * Free/destroy all XMesaBuffers associated with given display.
2287 */
2288 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
2289 {
2290 XMesaBuffer b, next;
2291 for (b = XMesaBufferList; b; b = next) {
2292 next = b->Next;
2293 if (b->display == dpy) {
2294 xmesa_free_buffer(b);
2295 }
2296 }
2297 }
2298
2299
2300 /*
2301 * Look for XMesaBuffers whose X window has been destroyed.
2302 * Deallocate any such XMesaBuffers.
2303 */
2304 void XMesaGarbageCollect( void )
2305 {
2306 XMesaBuffer b, next;
2307 for (b=XMesaBufferList; b; b=next) {
2308 next = b->Next;
2309 if (b->display && b->frontxrb->drawable && b->type == WINDOW) {
2310 #ifdef XFree86Server
2311 /* NOT_NEEDED */
2312 #else
2313 XSync(b->display, False);
2314 if (!window_exists( b->display, b->frontxrb->drawable )) {
2315 /* found a dead window, free the ancillary info */
2316 XMesaDestroyBuffer( b );
2317 }
2318 #endif
2319 }
2320 }
2321 }
2322
2323
2324 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2325 GLfloat red, GLfloat green,
2326 GLfloat blue, GLfloat alpha )
2327 {
2328 GLcontext *ctx = &xmesa->mesa;
2329 GLint r = (GLint) (red * 255.0F);
2330 GLint g = (GLint) (green * 255.0F);
2331 GLint b = (GLint) (blue * 255.0F);
2332 GLint a = (GLint) (alpha * 255.0F);
2333
2334 switch (xmesa->pixelformat) {
2335 case PF_Index:
2336 return 0;
2337 case PF_Truecolor:
2338 {
2339 unsigned long p;
2340 PACK_TRUECOLOR( p, r, g, b );
2341 return p;
2342 }
2343 case PF_8A8B8G8R:
2344 return PACK_8A8B8G8R( r, g, b, a );
2345 case PF_8A8R8G8B:
2346 return PACK_8A8R8G8B( r, g, b, a );
2347 case PF_8R8G8B:
2348 return PACK_8R8G8B( r, g, b );
2349 case PF_5R6G5B:
2350 return PACK_5R6G5B( r, g, b );
2351 case PF_Dither:
2352 {
2353 DITHER_SETUP;
2354 return DITHER( x, y, r, g, b );
2355 }
2356 case PF_1Bit:
2357 /* 382 = (3*255)/2 */
2358 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2359 case PF_HPCR:
2360 return DITHER_HPCR(x, y, r, g, b);
2361 case PF_Lookup:
2362 {
2363 LOOKUP_SETUP;
2364 return LOOKUP( r, g, b );
2365 }
2366 case PF_Grayscale:
2367 return GRAY_RGB( r, g, b );
2368 case PF_Dither_5R6G5B:
2369 /* fall through */
2370 case PF_Dither_True:
2371 {
2372 unsigned long p;
2373 PACK_TRUEDITHER(p, x, y, r, g, b);
2374 return p;
2375 }
2376 default:
2377 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
2378 }
2379 return 0;
2380 }
2381
2382
2383 /*
2384 * This is typically called when the window size changes and we need
2385 * to reallocate the buffer's back/depth/stencil/accum buffers.
2386 */
2387 PUBLIC void
2388 XMesaResizeBuffers( XMesaBuffer b )
2389 {
2390 GET_CURRENT_CONTEXT(ctx);
2391 XMesaContext xmctx = XMESA_CONTEXT(ctx);
2392 if (!xmctx)
2393 return;
2394 xmesa_check_and_update_buffer_size(xmctx, b);
2395 }
2396
2397
2398 static GLint
2399 xbuffer_to_renderbuffer(int buffer)
2400 {
2401 assert(MAX_AUX_BUFFERS <= 4);
2402
2403 switch (buffer) {
2404 case GLX_FRONT_LEFT_EXT:
2405 return BUFFER_FRONT_LEFT;
2406 case GLX_FRONT_RIGHT_EXT:
2407 return BUFFER_FRONT_RIGHT;
2408 case GLX_BACK_LEFT_EXT:
2409 return BUFFER_BACK_LEFT;
2410 case GLX_BACK_RIGHT_EXT:
2411 return BUFFER_BACK_RIGHT;
2412 case GLX_AUX0_EXT:
2413 return BUFFER_AUX0;
2414 case GLX_AUX1_EXT:
2415 return BUFFER_AUX1;
2416 case GLX_AUX2_EXT:
2417 return BUFFER_AUX2;
2418 case GLX_AUX3_EXT:
2419 return BUFFER_AUX3;
2420 case GLX_AUX4_EXT:
2421 case GLX_AUX5_EXT:
2422 case GLX_AUX6_EXT:
2423 case GLX_AUX7_EXT:
2424 case GLX_AUX8_EXT:
2425 case GLX_AUX9_EXT:
2426 default:
2427 /* BadValue error */
2428 return -1;
2429 }
2430 }
2431
2432
2433 PUBLIC void
2434 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
2435 const int *attrib_list)
2436 {
2437 #if 0
2438 GET_CURRENT_CONTEXT(ctx);
2439 const GLuint unit = ctx->Texture.CurrentUnit;
2440 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
2441 struct gl_texture_object *texObj;
2442 #endif
2443 struct gl_renderbuffer *rb;
2444 struct xmesa_renderbuffer *xrb;
2445 GLint b;
2446 XMesaImage *img = NULL;
2447 GLboolean freeImg = GL_FALSE;
2448
2449 b = xbuffer_to_renderbuffer(buffer);
2450 if (b < 0)
2451 return;
2452
2453 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
2454 return; /* BadMatch error */
2455
2456 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
2457 if (!rb) {
2458 /* invalid buffer */
2459 return;
2460 }
2461 xrb = xmesa_renderbuffer(rb);
2462
2463 #if 0
2464 switch (drawable->TextureTarget) {
2465 case GLX_TEXTURE_1D_EXT:
2466 texObj = texUnit->Current1D;
2467 break;
2468 case GLX_TEXTURE_2D_EXT:
2469 texObj = texUnit->Current2D;
2470 break;
2471 case GLX_TEXTURE_RECTANGLE_EXT:
2472 texObj = texUnit->CurrentRect;
2473 break;
2474 default:
2475 return; /* BadMatch error */
2476 }
2477 #endif
2478
2479 /*
2480 * The following is a quick and simple way to implement
2481 * BindTexImage. The better way is to write some new FetchTexel()
2482 * functions which would extract texels from XImages. We'd still
2483 * need to use GetImage when texturing from a Pixmap (front buffer)
2484 * but texturing from a back buffer (XImage) would avoid an image
2485 * copy.
2486 */
2487
2488 /* get XImage */
2489 if (xrb->pixmap) {
2490 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
2491 ZPixmap);
2492 freeImg = GL_TRUE;
2493 }
2494 else if (xrb->ximage) {
2495 img = xrb->ximage;
2496 }
2497
2498 /* store the XImage as a new texture image */
2499 if (img) {
2500 GLenum format, type, intFormat;
2501 if (img->bits_per_pixel == 32) {
2502 format = GL_BGRA;
2503 type = GL_UNSIGNED_BYTE;
2504 intFormat = GL_RGBA;
2505 }
2506 else if (img->bits_per_pixel == 24) {
2507 format = GL_BGR;
2508 type = GL_UNSIGNED_BYTE;
2509 intFormat = GL_RGB;
2510 }
2511 else if (img->bits_per_pixel == 16) {
2512 format = GL_BGR;
2513 type = GL_UNSIGNED_SHORT_5_6_5;
2514 intFormat = GL_RGB;
2515 }
2516 else {
2517 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
2518 return;
2519 }
2520 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2521 intFormat = GL_RGBA;
2522 }
2523 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
2524 intFormat = GL_RGB;
2525 }
2526
2527 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
2528 format, type, img->data);
2529
2530 if (freeImg) {
2531 XMesaDestroyImage(img);
2532 }
2533 }
2534 }
2535
2536
2537
2538 PUBLIC void
2539 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
2540 {
2541 const GLint b = xbuffer_to_renderbuffer(buffer);
2542 if (b < 0)
2543 return;
2544
2545 /* no-op for now */
2546 }
2547