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Merge branch 'mesa_7_5_branch' into 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_shader_objects
1321 #define need_GL_ARB_sync
1322 #define need_GL_ARB_vertex_program
1323 #define need_GL_APPLE_vertex_array_object
1324 #define need_GL_ATI_fragment_shader
1325 #define need_GL_EXT_depth_bounds_test
1326 #define need_GL_EXT_framebuffer_object
1327 #define need_GL_EXT_framebuffer_blit
1328 #define need_GL_EXT_gpu_program_parameters
1329 #define need_GL_EXT_paletted_texture
1330 #define need_GL_MESA_resize_buffers
1331 #define need_GL_NV_vertex_program
1332 #define need_GL_NV_fragment_program
1333
1334 #include "extension_helper.h"
1335 #include "utils.h"
1336
1337 const struct dri_extension card_extensions[] =
1338 {
1339 { "GL_VERSION_1_3", GL_VERSION_1_3_functions },
1340 { "GL_VERSION_1_4", GL_VERSION_1_4_functions },
1341 { "GL_VERSION_1_5", GL_VERSION_1_5_functions },
1342 { "GL_VERSION_2_0", GL_VERSION_2_0_functions },
1343
1344 { "GL_EXT_blend_color", GL_EXT_blend_color_functions },
1345 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions },
1346 { "GL_EXT_convolution", GL_EXT_convolution_functions },
1347 { "GL_EXT_histogram", GL_EXT_histogram_functions },
1348 { "GL_SGI_color_table", GL_SGI_color_table_functions },
1349
1350 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
1351 { "GL_ARB_sync", GL_ARB_sync_functions },
1352 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
1353 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
1354 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
1355 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
1356 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
1357 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
1358 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
1359 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
1360 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
1361 { "GL_NV_vertex_program", GL_NV_vertex_program_functions },
1362 { "GL_NV_fragment_program", GL_NV_fragment_program_functions },
1363 { NULL, NULL }
1364 };
1365 #endif
1366
1367 /*
1368 * Create a new X/Mesa visual.
1369 * Input: display - X11 display
1370 * visinfo - an XVisualInfo pointer
1371 * rgb_flag - GL_TRUE = RGB mode,
1372 * GL_FALSE = color index mode
1373 * alpha_flag - alpha buffer requested?
1374 * db_flag - GL_TRUE = double-buffered,
1375 * GL_FALSE = single buffered
1376 * stereo_flag - stereo visual?
1377 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1378 * GL_FALSE = use an off-screen pixmap for back buffer
1379 * depth_size - requested bits/depth values, or zero
1380 * stencil_size - requested bits/stencil values, or zero
1381 * accum_red_size - requested bits/red accum values, or zero
1382 * accum_green_size - requested bits/green accum values, or zero
1383 * accum_blue_size - requested bits/blue accum values, or zero
1384 * accum_alpha_size - requested bits/alpha accum values, or zero
1385 * num_samples - number of samples/pixel if multisampling, or zero
1386 * level - visual level, usually 0
1387 * visualCaveat - ala the GLX extension, usually GLX_NONE
1388 * Return; a new XMesaVisual or 0 if error.
1389 */
1390 PUBLIC
1391 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1392 XMesaVisualInfo visinfo,
1393 GLboolean rgb_flag,
1394 GLboolean alpha_flag,
1395 GLboolean db_flag,
1396 GLboolean stereo_flag,
1397 GLboolean ximage_flag,
1398 GLint depth_size,
1399 GLint stencil_size,
1400 GLint accum_red_size,
1401 GLint accum_green_size,
1402 GLint accum_blue_size,
1403 GLint accum_alpha_size,
1404 GLint num_samples,
1405 GLint level,
1406 GLint visualCaveat )
1407 {
1408 char *gamma;
1409 XMesaVisual v;
1410 GLint red_bits, green_bits, blue_bits, alpha_bits;
1411
1412 #ifdef IN_DRI_DRIVER
1413 /* driInitExtensions() should be called once per screen to setup extension
1414 * indices. There is no need to call it when the context is created since
1415 * XMesa enables mesa sw extensions on its own.
1416 */
1417 driInitExtensions( NULL, card_extensions, GL_FALSE );
1418 #endif
1419
1420 #ifndef XFree86Server
1421 /* For debugging only */
1422 if (_mesa_getenv("MESA_XSYNC")) {
1423 /* This makes debugging X easier.
1424 * In your debugger, set a breakpoint on _XError to stop when an
1425 * X protocol error is generated.
1426 */
1427 XSynchronize( display, 1 );
1428 }
1429 #endif
1430
1431 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1432 if (!v) {
1433 return NULL;
1434 }
1435
1436 v->display = display;
1437
1438 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1439 * the struct but we may need some of the information contained in it
1440 * at a later time.
1441 */
1442 #ifndef XFree86Server
1443 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1444 if(!v->visinfo) {
1445 _mesa_free(v);
1446 return NULL;
1447 }
1448 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1449 #endif
1450
1451 /* check for MESA_GAMMA environment variable */
1452 gamma = _mesa_getenv("MESA_GAMMA");
1453 if (gamma) {
1454 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1455 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1456 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1457 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1458 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1459 }
1460 else {
1461 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1462 }
1463
1464 v->ximage_flag = ximage_flag;
1465
1466 #ifdef XFree86Server
1467 /* We could calculate these values by ourselves. nplanes is either the sum
1468 * of the red, green, and blue bits or the number index bits.
1469 * ColormapEntries is either (1U << index_bits) or
1470 * (1U << max(redBits, greenBits, blueBits)).
1471 */
1472 assert(visinfo->nplanes > 0);
1473 v->nplanes = visinfo->nplanes;
1474 v->ColormapEntries = visinfo->ColormapEntries;
1475
1476 v->mesa_visual.redMask = visinfo->redMask;
1477 v->mesa_visual.greenMask = visinfo->greenMask;
1478 v->mesa_visual.blueMask = visinfo->blueMask;
1479 v->mesa_visual.visualID = visinfo->vid;
1480 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */
1481 #else
1482 v->mesa_visual.redMask = visinfo->red_mask;
1483 v->mesa_visual.greenMask = visinfo->green_mask;
1484 v->mesa_visual.blueMask = visinfo->blue_mask;
1485 v->mesa_visual.visualID = visinfo->visualid;
1486 v->mesa_visual.screen = visinfo->screen;
1487 #endif
1488
1489 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1490 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
1491 #else
1492 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
1493 #endif
1494
1495 v->mesa_visual.visualRating = visualCaveat;
1496
1497 if (alpha_flag)
1498 v->mesa_visual.alphaBits = 8;
1499
1500 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
1501
1502 {
1503 const int xclass = v->mesa_visual.visualType;
1504 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1505 red_bits = _mesa_bitcount(GET_REDMASK(v));
1506 green_bits = _mesa_bitcount(GET_GREENMASK(v));
1507 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
1508 }
1509 else {
1510 /* this is an approximation */
1511 int depth;
1512 depth = GET_VISUAL_DEPTH(v);
1513 red_bits = depth / 3;
1514 depth -= red_bits;
1515 green_bits = depth / 2;
1516 depth -= green_bits;
1517 blue_bits = depth;
1518 alpha_bits = 0;
1519 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1520 }
1521 alpha_bits = v->mesa_visual.alphaBits;
1522 }
1523
1524 _mesa_initialize_visual( &v->mesa_visual,
1525 rgb_flag, db_flag, stereo_flag,
1526 red_bits, green_bits,
1527 blue_bits, alpha_bits,
1528 v->mesa_visual.indexBits,
1529 depth_size,
1530 stencil_size,
1531 accum_red_size, accum_green_size,
1532 accum_blue_size, accum_alpha_size,
1533 0 );
1534
1535 /* XXX minor hack */
1536 v->mesa_visual.level = level;
1537 return v;
1538 }
1539
1540
1541 PUBLIC
1542 void XMesaDestroyVisual( XMesaVisual v )
1543 {
1544 #ifndef XFree86Server
1545 _mesa_free(v->visinfo);
1546 #endif
1547 _mesa_free(v);
1548 }
1549
1550
1551
1552 /**
1553 * Create a new XMesaContext.
1554 * \param v the XMesaVisual
1555 * \param share_list another XMesaContext with which to share display
1556 * lists or NULL if no sharing is wanted.
1557 * \return an XMesaContext or NULL if error.
1558 */
1559 PUBLIC
1560 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1561 {
1562 static GLboolean firstTime = GL_TRUE;
1563 XMesaContext c;
1564 GLcontext *mesaCtx;
1565 struct dd_function_table functions;
1566 TNLcontext *tnl;
1567
1568 if (firstTime) {
1569 _glthread_INIT_MUTEX(_xmesa_lock);
1570 firstTime = GL_FALSE;
1571 }
1572
1573 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1574 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1575 if (!c)
1576 return NULL;
1577
1578 mesaCtx = &(c->mesa);
1579
1580 /* initialize with default driver functions, then plug in XMesa funcs */
1581 _mesa_init_driver_functions(&functions);
1582 xmesa_init_driver_functions(v, &functions);
1583 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
1584 share_list ? &(share_list->mesa) : (GLcontext *) NULL,
1585 &functions, (void *) c)) {
1586 _mesa_free(c);
1587 return NULL;
1588 }
1589
1590 /* Enable this to exercise fixed function -> shader translation
1591 * with software rendering.
1592 */
1593 if (0) {
1594 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE;
1595 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
1596 }
1597
1598 _mesa_enable_sw_extensions(mesaCtx);
1599 _mesa_enable_1_3_extensions(mesaCtx);
1600 _mesa_enable_1_4_extensions(mesaCtx);
1601 _mesa_enable_1_5_extensions(mesaCtx);
1602 _mesa_enable_2_0_extensions(mesaCtx);
1603 _mesa_enable_2_1_extensions(mesaCtx);
1604 #if ENABLE_EXT_texure_compression_s3tc
1605 if (mesaCtx->Mesa_DXTn) {
1606 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
1607 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
1608 }
1609 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
1610 #endif
1611 #if ENABLE_EXT_timer_query
1612 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
1613 #endif
1614
1615 #ifdef XFree86Server
1616 /* If we're running in the X server, do bounds checking to prevent
1617 * segfaults and server crashes!
1618 */
1619 mesaCtx->Const.CheckArrayBounds = GL_TRUE;
1620 #endif
1621
1622 /* finish up xmesa context initializations */
1623 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
1624 c->xm_visual = v;
1625 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1626 c->display = v->display;
1627 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1628
1629 /* Initialize the software rasterizer and helper modules.
1630 */
1631 if (!_swrast_CreateContext( mesaCtx ) ||
1632 !_vbo_CreateContext( mesaCtx ) ||
1633 !_tnl_CreateContext( mesaCtx ) ||
1634 !_swsetup_CreateContext( mesaCtx )) {
1635 _mesa_free_context_data(&c->mesa);
1636 _mesa_free(c);
1637 return NULL;
1638 }
1639
1640 /* tnl setup */
1641 tnl = TNL_CONTEXT(mesaCtx);
1642 tnl->Driver.RunPipeline = _tnl_run_pipeline;
1643 /* swrast setup */
1644 xmesa_register_swrast_functions( mesaCtx );
1645 _swsetup_Wakeup(mesaCtx);
1646
1647 if (TEST_META_FUNCS)
1648 _mesa_meta_init(mesaCtx);
1649
1650 return c;
1651 }
1652
1653
1654
1655 PUBLIC
1656 void XMesaDestroyContext( XMesaContext c )
1657 {
1658 GLcontext *mesaCtx = &c->mesa;
1659
1660 #ifdef FX
1661 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) );
1662 #endif
1663
1664 if (TEST_META_FUNCS)
1665 _mesa_meta_free( mesaCtx );
1666
1667 _swsetup_DestroyContext( mesaCtx );
1668 _swrast_DestroyContext( mesaCtx );
1669 _tnl_DestroyContext( mesaCtx );
1670 _vbo_DestroyContext( mesaCtx );
1671 _mesa_free_context_data( mesaCtx );
1672 _mesa_free( c );
1673 }
1674
1675
1676
1677 /**
1678 * Private function for creating an XMesaBuffer which corresponds to an
1679 * X window or pixmap.
1680 * \param v the window's XMesaVisual
1681 * \param w the window we're wrapping
1682 * \return new XMesaBuffer or NULL if error
1683 */
1684 PUBLIC XMesaBuffer
1685 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
1686 {
1687 #ifndef XFree86Server
1688 XWindowAttributes attr;
1689 #endif
1690 XMesaBuffer b;
1691 XMesaColormap cmap;
1692 int depth;
1693
1694 assert(v);
1695 assert(w);
1696
1697 /* Check that window depth matches visual depth */
1698 #ifdef XFree86Server
1699 depth = ((XMesaDrawable)w)->depth;
1700 #else
1701 XGetWindowAttributes( v->display, w, &attr );
1702 depth = attr.depth;
1703 #endif
1704 if (GET_VISUAL_DEPTH(v) != depth) {
1705 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1706 GET_VISUAL_DEPTH(v), depth);
1707 return NULL;
1708 }
1709
1710 /* Find colormap */
1711 #ifdef XFree86Server
1712 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1713 #else
1714 if (attr.colormap) {
1715 cmap = attr.colormap;
1716 }
1717 else {
1718 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1719 /* this is weird, a window w/out a colormap!? */
1720 /* OK, let's just allocate a new one and hope for the best */
1721 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1722 }
1723 #endif
1724
1725 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1726 if (!b)
1727 return NULL;
1728
1729 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1730 (XMesaDrawable) w, cmap )) {
1731 xmesa_free_buffer(b);
1732 return NULL;
1733 }
1734
1735 return b;
1736 }
1737
1738
1739
1740 /**
1741 * Create a new XMesaBuffer from an X pixmap.
1742 *
1743 * \param v the XMesaVisual
1744 * \param p the pixmap
1745 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1746 * \c GLX_DIRECT_COLOR visual for the pixmap
1747 * \returns new XMesaBuffer or NULL if error
1748 */
1749 PUBLIC XMesaBuffer
1750 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1751 {
1752 XMesaBuffer b;
1753
1754 assert(v);
1755
1756 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1757 if (!b)
1758 return NULL;
1759
1760 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1761 (XMesaDrawable) p, cmap)) {
1762 xmesa_free_buffer(b);
1763 return NULL;
1764 }
1765
1766 return b;
1767 }
1768
1769
1770 /**
1771 * For GLX_EXT_texture_from_pixmap
1772 */
1773 XMesaBuffer
1774 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1775 XMesaColormap cmap,
1776 int format, int target, int mipmap)
1777 {
1778 GET_CURRENT_CONTEXT(ctx);
1779 XMesaBuffer b;
1780 GLuint width, height;
1781
1782 assert(v);
1783
1784 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1785 if (!b)
1786 return NULL;
1787
1788 /* get pixmap size, update framebuffer/renderbuffer dims */
1789 xmesa_get_window_size(v->display, b, &width, &height);
1790 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1791
1792 if (target == 0) {
1793 /* examine dims */
1794 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1795 target = GLX_TEXTURE_2D_EXT;
1796 }
1797 else if ( _mesa_bitcount(width) == 1
1798 && _mesa_bitcount(height) == 1) {
1799 /* power of two size */
1800 if (height == 1) {
1801 target = GLX_TEXTURE_1D_EXT;
1802 }
1803 else {
1804 target = GLX_TEXTURE_2D_EXT;
1805 }
1806 }
1807 else if (ctx->Extensions.NV_texture_rectangle) {
1808 target = GLX_TEXTURE_RECTANGLE_EXT;
1809 }
1810 else {
1811 /* non power of two textures not supported */
1812 XMesaDestroyBuffer(b);
1813 return 0;
1814 }
1815 }
1816
1817 b->TextureTarget = target;
1818 b->TextureFormat = format;
1819 b->TextureMipmap = mipmap;
1820
1821 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1822 (XMesaDrawable) p, cmap)) {
1823 xmesa_free_buffer(b);
1824 return NULL;
1825 }
1826
1827 return b;
1828 }
1829
1830
1831
1832 XMesaBuffer
1833 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1834 unsigned int width, unsigned int height)
1835 {
1836 #ifndef XFree86Server
1837 XMesaWindow root;
1838 XMesaDrawable drawable; /* X Pixmap Drawable */
1839 XMesaBuffer b;
1840
1841 /* allocate pixmap for front buffer */
1842 root = RootWindow( v->display, v->visinfo->screen );
1843 drawable = XCreatePixmap(v->display, root, width, height,
1844 v->visinfo->depth);
1845 if (!drawable)
1846 return NULL;
1847
1848 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1849 if (!b)
1850 return NULL;
1851
1852 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1853 drawable, cmap)) {
1854 xmesa_free_buffer(b);
1855 return NULL;
1856 }
1857
1858 return b;
1859 #else
1860 return 0;
1861 #endif
1862 }
1863
1864
1865
1866 /*
1867 * Deallocate an XMesaBuffer structure and all related info.
1868 */
1869 PUBLIC void
1870 XMesaDestroyBuffer(XMesaBuffer b)
1871 {
1872 xmesa_free_buffer(b);
1873 }
1874
1875
1876 /**
1877 * Query the current window size and update the corresponding GLframebuffer
1878 * and all attached renderbuffers.
1879 * Called when:
1880 * 1. the first time a buffer is bound to a context.
1881 * 2. from glViewport to poll for window size changes
1882 * 3. from the XMesaResizeBuffers() API function.
1883 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1884 * when resizing a buffer when no rendering context is bound.
1885 */
1886 void
1887 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1888 {
1889 GLuint width, height;
1890 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1891 if (drawBuffer->mesa_buffer.Width != width ||
1892 drawBuffer->mesa_buffer.Height != height) {
1893 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
1894 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1895 }
1896 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1897 }
1898
1899
1900 /*
1901 * Bind buffer b to context c and make c the current rendering context.
1902 */
1903 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1904 {
1905 return XMesaMakeCurrent2( c, b, b );
1906 }
1907
1908
1909 /*
1910 * Bind buffer b to context c and make c the current rendering context.
1911 */
1912 PUBLIC
1913 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1914 XMesaBuffer readBuffer )
1915 {
1916 if (c) {
1917 if (!drawBuffer || !readBuffer)
1918 return GL_FALSE; /* must specify buffers! */
1919
1920 if (&(c->mesa) == _mesa_get_current_context()
1921 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1922 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1923 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1924 /* same context and buffer, do nothing */
1925 return GL_TRUE;
1926 }
1927
1928 c->xm_buffer = drawBuffer;
1929
1930 #ifdef FX
1931 if (FXmakeCurrent( drawBuffer ))
1932 return GL_TRUE;
1933 #endif
1934
1935 /* Call this periodically to detect when the user has begun using
1936 * GL rendering from multiple threads.
1937 */
1938 _glapi_check_multithread();
1939
1940 xmesa_check_and_update_buffer_size(c, drawBuffer);
1941 if (readBuffer != drawBuffer)
1942 xmesa_check_and_update_buffer_size(c, readBuffer);
1943
1944 _mesa_make_current(&(c->mesa),
1945 &drawBuffer->mesa_buffer,
1946 &readBuffer->mesa_buffer);
1947
1948 if (c->xm_visual->mesa_visual.rgbMode) {
1949 /*
1950 * Must recompute and set these pixel values because colormap
1951 * can be different for different windows.
1952 */
1953 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1954 c->clearcolor[0],
1955 c->clearcolor[1],
1956 c->clearcolor[2],
1957 c->clearcolor[3],
1958 c->xm_visual->undithered_pf);
1959 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1960 }
1961
1962 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1963 drawBuffer->wasCurrent = GL_TRUE;
1964 }
1965 else {
1966 /* Detach */
1967 _mesa_make_current( NULL, NULL, NULL );
1968 }
1969 return GL_TRUE;
1970 }
1971
1972
1973 /*
1974 * Unbind the context c from its buffer.
1975 */
1976 GLboolean XMesaUnbindContext( XMesaContext c )
1977 {
1978 /* A no-op for XFree86 integration purposes */
1979 return GL_TRUE;
1980 }
1981
1982
1983 XMesaContext XMesaGetCurrentContext( void )
1984 {
1985 GET_CURRENT_CONTEXT(ctx);
1986 if (ctx) {
1987 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1988 return xmesa;
1989 }
1990 else {
1991 return 0;
1992 }
1993 }
1994
1995
1996 XMesaBuffer XMesaGetCurrentBuffer( void )
1997 {
1998 GET_CURRENT_CONTEXT(ctx);
1999 if (ctx) {
2000 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
2001 return xmbuf;
2002 }
2003 else {
2004 return 0;
2005 }
2006 }
2007
2008
2009 /* New in Mesa 3.1 */
2010 XMesaBuffer XMesaGetCurrentReadBuffer( void )
2011 {
2012 GET_CURRENT_CONTEXT(ctx);
2013 if (ctx) {
2014 return XMESA_BUFFER(ctx->ReadBuffer);
2015 }
2016 else {
2017 return 0;
2018 }
2019 }
2020
2021
2022 #ifdef XFree86Server
2023 PUBLIC
2024 GLboolean XMesaForceCurrent(XMesaContext c)
2025 {
2026 if (c) {
2027 _glapi_set_dispatch(c->mesa.CurrentDispatch);
2028
2029 if (&(c->mesa) != _mesa_get_current_context()) {
2030 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer);
2031 }
2032 }
2033 else {
2034 _mesa_make_current(NULL, NULL, NULL);
2035 }
2036 return GL_TRUE;
2037 }
2038
2039
2040 PUBLIC
2041 GLboolean XMesaLoseCurrent(XMesaContext c)
2042 {
2043 (void) c;
2044 _mesa_make_current(NULL, NULL, NULL);
2045 return GL_TRUE;
2046 }
2047
2048
2049 PUBLIC
2050 GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask )
2051 {
2052 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
2053 return GL_TRUE;
2054 }
2055 #endif /* XFree86Server */
2056
2057
2058 #ifndef FX
2059 GLboolean XMesaSetFXmode( GLint mode )
2060 {
2061 (void) mode;
2062 return GL_FALSE;
2063 }
2064 #endif
2065
2066
2067
2068 /*
2069 * Copy the back buffer to the front buffer. If there's no back buffer
2070 * this is a no-op.
2071 */
2072 PUBLIC
2073 void XMesaSwapBuffers( XMesaBuffer b )
2074 {
2075 GET_CURRENT_CONTEXT(ctx);
2076
2077 if (!b->backxrb) {
2078 /* single buffered */
2079 return;
2080 }
2081
2082 /* If we're swapping the buffer associated with the current context
2083 * we have to flush any pending rendering commands first.
2084 */
2085 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2086 _mesa_notifySwapBuffers(ctx);
2087
2088 if (b->db_mode) {
2089 #ifdef FX
2090 if (FXswapBuffers(b))
2091 return;
2092 #endif
2093 if (b->backxrb->ximage) {
2094 /* Copy Ximage (back buf) from client memory to server window */
2095 #if defined(USE_XSHM) && !defined(XFree86Server)
2096 if (b->shm) {
2097 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2098 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2099 b->swapgc,
2100 b->backxrb->ximage, 0, 0,
2101 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2102 False );
2103 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2104 }
2105 else
2106 #endif
2107 {
2108 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2109 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2110 b->swapgc,
2111 b->backxrb->ximage, 0, 0,
2112 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
2113 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2114 }
2115 }
2116 else if (b->backxrb->pixmap) {
2117 /* Copy pixmap (back buf) to window (front buf) on server */
2118 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2119 XMesaCopyArea( b->xm_visual->display,
2120 b->backxrb->pixmap, /* source drawable */
2121 b->frontxrb->drawable, /* dest. drawable */
2122 b->swapgc,
2123 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2124 0, 0 /* dest region */
2125 );
2126 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2127 }
2128
2129 if (b->swAlpha)
2130 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer);
2131 }
2132 #if !defined(XFree86Server)
2133 XSync( b->xm_visual->display, False );
2134 #endif
2135 }
2136
2137
2138
2139 /*
2140 * Copy sub-region of back buffer to front buffer
2141 */
2142 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2143 {
2144 GET_CURRENT_CONTEXT(ctx);
2145
2146 /* If we're swapping the buffer associated with the current context
2147 * we have to flush any pending rendering commands first.
2148 */
2149 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2150 _mesa_notifySwapBuffers(ctx);
2151
2152 if (!b->backxrb) {
2153 /* single buffered */
2154 return;
2155 }
2156
2157 if (b->db_mode) {
2158 int yTop = b->mesa_buffer.Height - y - height;
2159 #ifdef FX
2160 if (FXswapBuffers(b))
2161 return;
2162 #endif
2163 if (b->backxrb->ximage) {
2164 /* Copy Ximage from host's memory to server's window */
2165 #if defined(USE_XSHM) && !defined(XFree86Server)
2166 if (b->shm) {
2167 /* XXX assuming width and height aren't too large! */
2168 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2169 b->swapgc,
2170 b->backxrb->ximage, x, yTop,
2171 x, yTop, width, height, False );
2172 /* wait for finished event??? */
2173 }
2174 else
2175 #endif
2176 {
2177 /* XXX assuming width and height aren't too large! */
2178 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2179 b->swapgc,
2180 b->backxrb->ximage, x, yTop,
2181 x, yTop, width, height );
2182 }
2183 }
2184 else {
2185 /* Copy pixmap to window on server */
2186 XMesaCopyArea( b->xm_visual->display,
2187 b->backxrb->pixmap, /* source drawable */
2188 b->frontxrb->drawable, /* dest. drawable */
2189 b->swapgc,
2190 x, yTop, width, height, /* source region */
2191 x, yTop /* dest region */
2192 );
2193 }
2194 }
2195 }
2196
2197
2198 /*
2199 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2200 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2201 * back buffer directly.
2202 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2203 * ximage - pointer to back buffer's XImage, or NULL
2204 * Return: GL_TRUE = context is double buffered
2205 * GL_FALSE = context is single buffered
2206 */
2207 #ifndef XFree86Server
2208 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2209 XMesaPixmap *pixmap,
2210 XMesaImage **ximage )
2211 {
2212 if (b->db_mode) {
2213 if (pixmap)
2214 *pixmap = b->backxrb->pixmap;
2215 if (ximage)
2216 *ximage = b->backxrb->ximage;
2217 return GL_TRUE;
2218 }
2219 else {
2220 *pixmap = 0;
2221 *ximage = NULL;
2222 return GL_FALSE;
2223 }
2224 }
2225 #endif /* XFree86Server */
2226
2227
2228 /*
2229 * Return the depth buffer associated with an XMesaBuffer.
2230 * Input: b - the XMesa buffer handle
2231 * Output: width, height - size of buffer in pixels
2232 * bytesPerValue - bytes per depth value (2 or 4)
2233 * buffer - pointer to depth buffer values
2234 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2235 */
2236 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2237 GLint *bytesPerValue, void **buffer )
2238 {
2239 struct gl_renderbuffer *rb
2240 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
2241 if (!rb || !rb->Data) {
2242 *width = 0;
2243 *height = 0;
2244 *bytesPerValue = 0;
2245 *buffer = 0;
2246 return GL_FALSE;
2247 }
2248 else {
2249 *width = b->mesa_buffer.Width;
2250 *height = b->mesa_buffer.Height;
2251 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
2252 ? sizeof(GLushort) : sizeof(GLuint);
2253 *buffer = rb->Data;
2254 return GL_TRUE;
2255 }
2256 }
2257
2258
2259 void XMesaFlush( XMesaContext c )
2260 {
2261 if (c && c->xm_visual) {
2262 #ifdef XFree86Server
2263 /* NOT_NEEDED */
2264 #else
2265 XSync( c->xm_visual->display, False );
2266 #endif
2267 }
2268 }
2269
2270
2271
2272 const char *XMesaGetString( XMesaContext c, int name )
2273 {
2274 (void) c;
2275 if (name==XMESA_VERSION) {
2276 return "5.0";
2277 }
2278 else if (name==XMESA_EXTENSIONS) {
2279 return "";
2280 }
2281 else {
2282 return NULL;
2283 }
2284 }
2285
2286
2287
2288 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2289 {
2290 XMesaBuffer b;
2291 for (b=XMesaBufferList; b; b=b->Next) {
2292 if (b->frontxrb->drawable == d && b->display == dpy) {
2293 return b;
2294 }
2295 }
2296 return NULL;
2297 }
2298
2299
2300 /**
2301 * Free/destroy all XMesaBuffers associated with given display.
2302 */
2303 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
2304 {
2305 XMesaBuffer b, next;
2306 for (b = XMesaBufferList; b; b = next) {
2307 next = b->Next;
2308 if (b->display == dpy) {
2309 xmesa_free_buffer(b);
2310 }
2311 }
2312 }
2313
2314
2315 /*
2316 * Look for XMesaBuffers whose X window has been destroyed.
2317 * Deallocate any such XMesaBuffers.
2318 */
2319 void XMesaGarbageCollect( void )
2320 {
2321 XMesaBuffer b, next;
2322 for (b=XMesaBufferList; b; b=next) {
2323 next = b->Next;
2324 if (b->display && b->frontxrb->drawable && b->type == WINDOW) {
2325 #ifdef XFree86Server
2326 /* NOT_NEEDED */
2327 #else
2328 XSync(b->display, False);
2329 if (!window_exists( b->display, b->frontxrb->drawable )) {
2330 /* found a dead window, free the ancillary info */
2331 XMesaDestroyBuffer( b );
2332 }
2333 #endif
2334 }
2335 }
2336 }
2337
2338
2339 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2340 GLfloat red, GLfloat green,
2341 GLfloat blue, GLfloat alpha )
2342 {
2343 GLcontext *ctx = &xmesa->mesa;
2344 GLint r = (GLint) (red * 255.0F);
2345 GLint g = (GLint) (green * 255.0F);
2346 GLint b = (GLint) (blue * 255.0F);
2347 GLint a = (GLint) (alpha * 255.0F);
2348
2349 switch (xmesa->pixelformat) {
2350 case PF_Index:
2351 return 0;
2352 case PF_Truecolor:
2353 {
2354 unsigned long p;
2355 PACK_TRUECOLOR( p, r, g, b );
2356 return p;
2357 }
2358 case PF_8A8B8G8R:
2359 return PACK_8A8B8G8R( r, g, b, a );
2360 case PF_8A8R8G8B:
2361 return PACK_8A8R8G8B( r, g, b, a );
2362 case PF_8R8G8B:
2363 return PACK_8R8G8B( r, g, b );
2364 case PF_5R6G5B:
2365 return PACK_5R6G5B( r, g, b );
2366 case PF_Dither:
2367 {
2368 DITHER_SETUP;
2369 return DITHER( x, y, r, g, b );
2370 }
2371 case PF_1Bit:
2372 /* 382 = (3*255)/2 */
2373 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2374 case PF_HPCR:
2375 return DITHER_HPCR(x, y, r, g, b);
2376 case PF_Lookup:
2377 {
2378 LOOKUP_SETUP;
2379 return LOOKUP( r, g, b );
2380 }
2381 case PF_Grayscale:
2382 return GRAY_RGB( r, g, b );
2383 case PF_Dither_5R6G5B:
2384 /* fall through */
2385 case PF_Dither_True:
2386 {
2387 unsigned long p;
2388 PACK_TRUEDITHER(p, x, y, r, g, b);
2389 return p;
2390 }
2391 default:
2392 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
2393 }
2394 return 0;
2395 }
2396
2397
2398 /*
2399 * This is typically called when the window size changes and we need
2400 * to reallocate the buffer's back/depth/stencil/accum buffers.
2401 */
2402 PUBLIC void
2403 XMesaResizeBuffers( XMesaBuffer b )
2404 {
2405 GET_CURRENT_CONTEXT(ctx);
2406 XMesaContext xmctx = XMESA_CONTEXT(ctx);
2407 if (!xmctx)
2408 return;
2409 xmesa_check_and_update_buffer_size(xmctx, b);
2410 }
2411
2412
2413 static GLint
2414 xbuffer_to_renderbuffer(int buffer)
2415 {
2416 assert(MAX_AUX_BUFFERS <= 4);
2417
2418 switch (buffer) {
2419 case GLX_FRONT_LEFT_EXT:
2420 return BUFFER_FRONT_LEFT;
2421 case GLX_FRONT_RIGHT_EXT:
2422 return BUFFER_FRONT_RIGHT;
2423 case GLX_BACK_LEFT_EXT:
2424 return BUFFER_BACK_LEFT;
2425 case GLX_BACK_RIGHT_EXT:
2426 return BUFFER_BACK_RIGHT;
2427 case GLX_AUX0_EXT:
2428 return BUFFER_AUX0;
2429 case GLX_AUX1_EXT:
2430 case GLX_AUX2_EXT:
2431 case GLX_AUX3_EXT:
2432 case GLX_AUX4_EXT:
2433 case GLX_AUX5_EXT:
2434 case GLX_AUX6_EXT:
2435 case GLX_AUX7_EXT:
2436 case GLX_AUX8_EXT:
2437 case GLX_AUX9_EXT:
2438 default:
2439 /* BadValue error */
2440 return -1;
2441 }
2442 }
2443
2444
2445 PUBLIC void
2446 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
2447 const int *attrib_list)
2448 {
2449 #if 0
2450 GET_CURRENT_CONTEXT(ctx);
2451 const GLuint unit = ctx->Texture.CurrentUnit;
2452 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
2453 struct gl_texture_object *texObj;
2454 #endif
2455 struct gl_renderbuffer *rb;
2456 struct xmesa_renderbuffer *xrb;
2457 GLint b;
2458 XMesaImage *img = NULL;
2459 GLboolean freeImg = GL_FALSE;
2460
2461 b = xbuffer_to_renderbuffer(buffer);
2462 if (b < 0)
2463 return;
2464
2465 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
2466 return; /* BadMatch error */
2467
2468 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
2469 if (!rb) {
2470 /* invalid buffer */
2471 return;
2472 }
2473 xrb = xmesa_renderbuffer(rb);
2474
2475 #if 0
2476 switch (drawable->TextureTarget) {
2477 case GLX_TEXTURE_1D_EXT:
2478 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
2479 break;
2480 case GLX_TEXTURE_2D_EXT:
2481 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
2482 break;
2483 case GLX_TEXTURE_RECTANGLE_EXT:
2484 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
2485 break;
2486 default:
2487 return; /* BadMatch error */
2488 }
2489 #endif
2490
2491 /*
2492 * The following is a quick and simple way to implement
2493 * BindTexImage. The better way is to write some new FetchTexel()
2494 * functions which would extract texels from XImages. We'd still
2495 * need to use GetImage when texturing from a Pixmap (front buffer)
2496 * but texturing from a back buffer (XImage) would avoid an image
2497 * copy.
2498 */
2499
2500 /* get XImage */
2501 if (xrb->pixmap) {
2502 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
2503 ZPixmap);
2504 freeImg = GL_TRUE;
2505 }
2506 else if (xrb->ximage) {
2507 img = xrb->ximage;
2508 }
2509
2510 /* store the XImage as a new texture image */
2511 if (img) {
2512 GLenum format, type, intFormat;
2513 if (img->bits_per_pixel == 32) {
2514 format = GL_BGRA;
2515 type = GL_UNSIGNED_BYTE;
2516 intFormat = GL_RGBA;
2517 }
2518 else if (img->bits_per_pixel == 24) {
2519 format = GL_BGR;
2520 type = GL_UNSIGNED_BYTE;
2521 intFormat = GL_RGB;
2522 }
2523 else if (img->bits_per_pixel == 16) {
2524 format = GL_BGR;
2525 type = GL_UNSIGNED_SHORT_5_6_5;
2526 intFormat = GL_RGB;
2527 }
2528 else {
2529 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
2530 return;
2531 }
2532 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2533 intFormat = GL_RGBA;
2534 }
2535 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
2536 intFormat = GL_RGB;
2537 }
2538
2539 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
2540 format, type, img->data);
2541
2542 if (freeImg) {
2543 XMesaDestroyImage(img);
2544 }
2545 }
2546 }
2547
2548
2549
2550 PUBLIC void
2551 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
2552 {
2553 const GLint b = xbuffer_to_renderbuffer(buffer);
2554 if (b < 0)
2555 return;
2556
2557 /* no-op for now */
2558 }
2559