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Merge branch 'mesa_7_6_branch'
[mesa.git] / src / mesa / drivers / x11 / xm_api.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file xm_api.c
27 *
28 * All the XMesa* API functions.
29 *
30 *
31 * NOTES:
32 *
33 * The window coordinate system origin (0,0) is in the lower-left corner
34 * of the window. X11's window coordinate origin is in the upper-left
35 * corner of the window. Therefore, most drawing functions in this
36 * file have to flip Y coordinates.
37 *
38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
39 * in support for the MIT Shared Memory extension. If enabled, when you
40 * use an Ximage for the back buffer in double buffered mode, the "swap"
41 * operation will be faster. You must also link with -lXext.
42 *
43 * Byte swapping: If the Mesa host and the X display use a different
44 * byte order then there's some trickiness to be aware of when using
45 * XImages. The byte ordering used for the XImage is that of the X
46 * display, not the Mesa host.
47 * The color-to-pixel encoding for True/DirectColor must be done
48 * according to the display's visual red_mask, green_mask, and blue_mask.
49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
50 * do byte swapping if needed. If one wants to directly "poke" the pixel
51 * into the XImage's buffer then the pixel must be byte swapped first. In
52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
53 * and use XPutPixel everywhere except in the implementation of
54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
55 * instead of using XPutPixel we "poke" our values after byte-swapping
56 * the clear pixel value if needed.
57 *
58 */
59
60 #ifdef __CYGWIN__
61 #undef WIN32
62 #undef __WIN32__
63 #endif
64
65 #include "glxheader.h"
66 #include "xmesaP.h"
67 #include "main/context.h"
68 #include "main/extensions.h"
69 #include "main/framebuffer.h"
70 #include "main/imports.h"
71 #include "main/macros.h"
72 #include "main/renderbuffer.h"
73 #include "main/teximage.h"
74 #include "glapi/glthread.h"
75 #include "swrast/swrast.h"
76 #include "swrast_setup/swrast_setup.h"
77 #include "vbo/vbo.h"
78 #include "tnl/tnl.h"
79 #include "tnl/t_context.h"
80 #include "tnl/t_pipeline.h"
81 #include "drivers/common/driverfuncs.h"
82
83 /**
84 * Global X driver lock
85 */
86 _glthread_Mutex _xmesa_lock;
87
88
89
90 /**
91 * Lookup tables for HPCR pixel format:
92 */
93 static short hpcr_rgbTbl[3][256] = {
94 {
95 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
96 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
97 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
98 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
99 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
100 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
101 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
102 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
103 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
104 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
105 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
106 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
107 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
108 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
109 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
110 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
111 },
112 {
113 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
114 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
115 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
116 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
117 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
118 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
119 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
120 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
121 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
122 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
123 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
124 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
125 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
126 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
127 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
128 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
129 },
130 {
131 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
132 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
133 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
134 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
135 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
136 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
137 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
138 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
139 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
140 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
141 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
142 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
143 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
144 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
145 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
146 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
147 }
148 };
149
150
151
152 /**********************************************************************/
153 /***** X Utility Functions *****/
154 /**********************************************************************/
155
156
157 /**
158 * Return the host's byte order as LSBFirst or MSBFirst ala X.
159 */
160 #ifndef XFree86Server
161 static int host_byte_order( void )
162 {
163 int i = 1;
164 char *cptr = (char *) &i;
165 return (*cptr==1) ? LSBFirst : MSBFirst;
166 }
167 #endif
168
169
170 /**
171 * Check if the X Shared Memory extension is available.
172 * Return: 0 = not available
173 * 1 = shared XImage support available
174 * 2 = shared Pixmap support available also
175 */
176 static int check_for_xshm( XMesaDisplay *display )
177 {
178 #if defined(USE_XSHM) && !defined(XFree86Server)
179 int major, minor, ignore;
180 Bool pixmaps;
181
182 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
183 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) {
184 return (pixmaps==True) ? 2 : 1;
185 }
186 else {
187 return 0;
188 }
189 }
190 else {
191 return 0;
192 }
193 #else
194 /* No XSHM support */
195 return 0;
196 #endif
197 }
198
199
200 /**
201 * Apply gamma correction to an intensity value in [0..max]. Return the
202 * new intensity value.
203 */
204 static GLint
205 gamma_adjust( GLfloat gamma, GLint value, GLint max )
206 {
207 if (gamma == 1.0) {
208 return value;
209 }
210 else {
211 double x = (double) value / (double) max;
212 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma));
213 }
214 }
215
216
217
218 /**
219 * Return the true number of bits per pixel for XImages.
220 * For example, if we request a 24-bit deep visual we may actually need/get
221 * 32bpp XImages. This function returns the appropriate bpp.
222 * Input: dpy - the X display
223 * visinfo - desribes the visual to be used for XImages
224 * Return: true number of bits per pixel for XImages
225 */
226 static int
227 bits_per_pixel( XMesaVisual xmv )
228 {
229 #ifdef XFree86Server
230 const int depth = xmv->nplanes;
231 int i;
232 assert(depth > 0);
233 for (i = 0; i < screenInfo.numPixmapFormats; i++) {
234 if (screenInfo.formats[i].depth == depth)
235 return screenInfo.formats[i].bitsPerPixel;
236 }
237 return depth; /* should never get here, but this should be safe */
238 #else
239 XMesaDisplay *dpy = xmv->display;
240 XMesaVisualInfo visinfo = xmv->visinfo;
241 XMesaImage *img;
242 int bitsPerPixel;
243 /* Create a temporary XImage */
244 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
245 ZPixmap, 0, /*format, offset*/
246 (char*) MALLOC(8), /*data*/
247 1, 1, /*width, height*/
248 32, /*bitmap_pad*/
249 0 /*bytes_per_line*/
250 );
251 assert(img);
252 /* grab the bits/pixel value */
253 bitsPerPixel = img->bits_per_pixel;
254 /* free the XImage */
255 _mesa_free( img->data );
256 img->data = NULL;
257 XMesaDestroyImage( img );
258 return bitsPerPixel;
259 #endif
260 }
261
262
263
264 /*
265 * Determine if a given X window ID is valid (window exists).
266 * Do this by calling XGetWindowAttributes() for the window and
267 * checking if we catch an X error.
268 * Input: dpy - the display
269 * win - the window to check for existance
270 * Return: GL_TRUE - window exists
271 * GL_FALSE - window doesn't exist
272 */
273 #ifndef XFree86Server
274 static GLboolean WindowExistsFlag;
275
276 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
277 {
278 (void) dpy;
279 if (xerr->error_code == BadWindow) {
280 WindowExistsFlag = GL_FALSE;
281 }
282 return 0;
283 }
284
285 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
286 {
287 XWindowAttributes wa;
288 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
289 WindowExistsFlag = GL_TRUE;
290 old_handler = XSetErrorHandler(window_exists_err_handler);
291 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
292 XSetErrorHandler(old_handler);
293 return WindowExistsFlag;
294 }
295
296 static Status
297 get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
298 {
299 Window root;
300 Status stat;
301 int xpos, ypos;
302 unsigned int w, h, bw, depth;
303 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
304 *width = w;
305 *height = h;
306 return stat;
307 }
308 #endif
309
310
311 /**
312 * Return the size of the window (or pixmap) that corresponds to the
313 * given XMesaBuffer.
314 * \param width returns width in pixels
315 * \param height returns height in pixels
316 */
317 void
318 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
319 GLuint *width, GLuint *height)
320 {
321 #ifdef XFree86Server
322 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH);
323 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT);
324 #else
325 Status stat;
326
327 _glthread_LOCK_MUTEX(_xmesa_lock);
328 XSync(b->xm_visual->display, 0); /* added for Chromium */
329 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
330 _glthread_UNLOCK_MUTEX(_xmesa_lock);
331
332 if (!stat) {
333 /* probably querying a window that's recently been destroyed */
334 _mesa_warning(NULL, "XGetGeometry failed!\n");
335 *width = *height = 1;
336 }
337 #endif
338 }
339
340
341
342 /**********************************************************************/
343 /***** Linked list of XMesaBuffers *****/
344 /**********************************************************************/
345
346 XMesaBuffer XMesaBufferList = NULL;
347
348
349 /**
350 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
351 * Note that XMesaBuffer is derived from GLframebuffer.
352 * The new XMesaBuffer will not have any size (Width=Height=0).
353 *
354 * \param d the corresponding X drawable (window or pixmap)
355 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
356 * \param vis the buffer's visual
357 * \param cmap the window's colormap, if known.
358 * \return new XMesaBuffer or NULL if any problem
359 */
360 static XMesaBuffer
361 create_xmesa_buffer(XMesaDrawable d, BufferType type,
362 XMesaVisual vis, XMesaColormap cmap)
363 {
364 XMesaBuffer b;
365
366 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
367
368 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
369 if (!b)
370 return NULL;
371
372 b->display = vis->display;
373 b->xm_visual = vis;
374 b->type = type;
375 b->cmap = cmap;
376
377 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
378 b->mesa_buffer.Delete = xmesa_delete_framebuffer;
379
380 /*
381 * Front renderbuffer
382 */
383 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE);
384 if (!b->frontxrb) {
385 _mesa_free(b);
386 return NULL;
387 }
388 b->frontxrb->Parent = b;
389 b->frontxrb->drawable = d;
390 b->frontxrb->pixmap = (XMesaPixmap) d;
391 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
392 &b->frontxrb->Base);
393
394 /*
395 * Back renderbuffer
396 */
397 if (vis->mesa_visual.doubleBufferMode) {
398 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE);
399 if (!b->backxrb) {
400 /* XXX free front xrb too */
401 _mesa_free(b);
402 return NULL;
403 }
404 b->backxrb->Parent = b;
405 /* determine back buffer implementation */
406 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
407
408 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
409 &b->backxrb->Base);
410 }
411
412 /*
413 * Software alpha planes
414 */
415 if (vis->mesa_visual.alphaBits > 0
416 && vis->undithered_pf != PF_8A8B8G8R
417 && vis->undithered_pf != PF_8A8R8G8B) {
418 /* Visual has alpha, but pixel format doesn't support it.
419 * We'll use an alpha renderbuffer wrapper.
420 */
421 b->swAlpha = GL_TRUE;
422 }
423 else {
424 b->swAlpha = GL_FALSE;
425 }
426
427 /*
428 * Other renderbuffer (depth, stencil, etc)
429 */
430 _mesa_add_soft_renderbuffers(&b->mesa_buffer,
431 GL_FALSE, /* color */
432 vis->mesa_visual.haveDepthBuffer,
433 vis->mesa_visual.haveStencilBuffer,
434 vis->mesa_visual.haveAccumBuffer,
435 b->swAlpha,
436 vis->mesa_visual.numAuxBuffers > 0 );
437
438 /* GLX_EXT_texture_from_pixmap */
439 b->TextureTarget = 0;
440 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
441 b->TextureMipmap = 0;
442
443 /* insert buffer into linked list */
444 b->Next = XMesaBufferList;
445 XMesaBufferList = b;
446
447 return b;
448 }
449
450
451 /**
452 * Find an XMesaBuffer by matching X display and colormap but NOT matching
453 * the notThis buffer.
454 */
455 XMesaBuffer
456 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
457 {
458 XMesaBuffer b;
459 for (b=XMesaBufferList; b; b=b->Next) {
460 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
461 return b;
462 }
463 }
464 return NULL;
465 }
466
467
468 /**
469 * Remove buffer from linked list, delete if no longer referenced.
470 */
471 static void
472 xmesa_free_buffer(XMesaBuffer buffer)
473 {
474 XMesaBuffer prev = NULL, b;
475
476 for (b = XMesaBufferList; b; b = b->Next) {
477 if (b == buffer) {
478 struct gl_framebuffer *fb = &buffer->mesa_buffer;
479
480 /* unlink buffer from list */
481 if (prev)
482 prev->Next = buffer->Next;
483 else
484 XMesaBufferList = buffer->Next;
485
486 /* mark as delete pending */
487 fb->DeletePending = GL_TRUE;
488
489 /* Since the X window for the XMesaBuffer is going away, we don't
490 * want to dereference this pointer in the future.
491 */
492 b->frontxrb->drawable = 0;
493
494 /* Unreference. If count = zero we'll really delete the buffer */
495 _mesa_reference_framebuffer(&fb, NULL);
496
497 return;
498 }
499 /* continue search */
500 prev = b;
501 }
502 /* buffer not found in XMesaBufferList */
503 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
504 }
505
506
507 /**
508 * Copy X color table stuff from one XMesaBuffer to another.
509 */
510 static void
511 copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
512 {
513 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table));
514 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r));
515 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g));
516 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b));
517 dst->num_alloced = src->num_alloced;
518 MEMCPY(dst->alloced_colors, src->alloced_colors,
519 sizeof(src->alloced_colors));
520 }
521
522
523
524 /**********************************************************************/
525 /***** Misc Private Functions *****/
526 /**********************************************************************/
527
528
529 /**
530 * A replacement for XAllocColor. This function should never
531 * fail to allocate a color. When XAllocColor fails, we return
532 * the nearest matching color. If we have to allocate many colors
533 * this function isn't too efficient; the XQueryColors() could be
534 * done just once.
535 * Written by Michael Pichler, Brian Paul, Mark Kilgard
536 * Input: dpy - X display
537 * cmap - X colormap
538 * cmapSize - size of colormap
539 * In/Out: color - the XColor struct
540 * Output: exact - 1=exact color match, 0=closest match
541 * alloced - 1=XAlloc worked, 0=XAlloc failed
542 */
543 static void
544 noFaultXAllocColor( int client,
545 XMesaDisplay *dpy,
546 XMesaColormap cmap,
547 int cmapSize,
548 XMesaColor *color,
549 int *exact, int *alloced )
550 {
551 #ifdef XFree86Server
552 Pixel *ppixIn;
553 xrgb *ctable;
554 #else
555 /* we'll try to cache ctable for better remote display performance */
556 static Display *prevDisplay = NULL;
557 static XMesaColormap prevCmap = 0;
558 static int prevCmapSize = 0;
559 static XMesaColor *ctable = NULL;
560 #endif
561 XMesaColor subColor;
562 int i, bestmatch;
563 double mindist; /* 3*2^16^2 exceeds long int precision. */
564
565 (void) client;
566
567 /* First try just using XAllocColor. */
568 #ifdef XFree86Server
569 if (AllocColor(cmap,
570 &color->red, &color->green, &color->blue,
571 &color->pixel,
572 client) == Success)
573 #else
574 if (XAllocColor(dpy, cmap, color))
575 #endif
576 {
577 *exact = 1;
578 *alloced = 1;
579 return;
580 }
581
582 /* Alloc failed, search for closest match */
583
584 /* Retrieve color table entries. */
585 /* XXX alloca candidate. */
586 #ifdef XFree86Server
587 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel));
588 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb));
589 for (i = 0; i < cmapSize; i++) {
590 ppixIn[i] = i;
591 }
592 QueryColors(cmap, cmapSize, ppixIn, ctable);
593 #else
594 if (prevDisplay != dpy || prevCmap != cmap
595 || prevCmapSize != cmapSize || !ctable) {
596 /* free previously cached color table */
597 if (ctable)
598 _mesa_free(ctable);
599 /* Get the color table from X */
600 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor));
601 assert(ctable);
602 for (i = 0; i < cmapSize; i++) {
603 ctable[i].pixel = i;
604 }
605 XQueryColors(dpy, cmap, ctable, cmapSize);
606 prevDisplay = dpy;
607 prevCmap = cmap;
608 prevCmapSize = cmapSize;
609 }
610 #endif
611
612 /* Find best match. */
613 bestmatch = -1;
614 mindist = 0.0;
615 for (i = 0; i < cmapSize; i++) {
616 double dr = 0.30 * ((double) color->red - (double) ctable[i].red);
617 double dg = 0.59 * ((double) color->green - (double) ctable[i].green);
618 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue);
619 double dist = dr * dr + dg * dg + db * db;
620 if (bestmatch < 0 || dist < mindist) {
621 bestmatch = i;
622 mindist = dist;
623 }
624 }
625
626 /* Return result. */
627 subColor.red = ctable[bestmatch].red;
628 subColor.green = ctable[bestmatch].green;
629 subColor.blue = ctable[bestmatch].blue;
630 /* Try to allocate the closest match color. This should only
631 * fail if the cell is read/write. Otherwise, we're incrementing
632 * the cell's reference count.
633 */
634 #ifdef XFree86Server
635 if (AllocColor(cmap,
636 &subColor.red, &subColor.green, &subColor.blue,
637 &subColor.pixel,
638 client) == Success) {
639 #else
640 if (XAllocColor(dpy, cmap, &subColor)) {
641 #endif
642 *alloced = 1;
643 }
644 else {
645 /* do this to work around a problem reported by Frank Ortega */
646 subColor.pixel = (unsigned long) bestmatch;
647 subColor.red = ctable[bestmatch].red;
648 subColor.green = ctable[bestmatch].green;
649 subColor.blue = ctable[bestmatch].blue;
650 subColor.flags = DoRed | DoGreen | DoBlue;
651 *alloced = 0;
652 }
653 #ifdef XFree86Server
654 _mesa_free(ppixIn);
655 _mesa_free(ctable);
656 #else
657 /* don't free table, save it for next time */
658 #endif
659
660 *color = subColor;
661 *exact = 0;
662 }
663
664
665
666 /**
667 * Do setup for PF_GRAYSCALE pixel format.
668 * Note that buffer may be NULL.
669 */
670 static GLboolean
671 setup_grayscale(int client, XMesaVisual v,
672 XMesaBuffer buffer, XMesaColormap cmap)
673 {
674 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
675 return GL_FALSE;
676 }
677
678 if (buffer) {
679 XMesaBuffer prevBuffer;
680
681 if (!cmap) {
682 return GL_FALSE;
683 }
684
685 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
686 if (prevBuffer &&
687 (buffer->xm_visual->mesa_visual.rgbMode ==
688 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
689 /* Copy colormap stuff from previous XMesaBuffer which uses same
690 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
691 */
692 copy_colortable_info(buffer, prevBuffer);
693 }
694 else {
695 /* Allocate 256 shades of gray */
696 int gray;
697 int colorsfailed = 0;
698 for (gray=0;gray<256;gray++) {
699 GLint r = gamma_adjust( v->RedGamma, gray, 255 );
700 GLint g = gamma_adjust( v->GreenGamma, gray, 255 );
701 GLint b = gamma_adjust( v->BlueGamma, gray, 255 );
702 int exact, alloced;
703 XMesaColor xcol;
704 xcol.red = (r << 8) | r;
705 xcol.green = (g << 8) | g;
706 xcol.blue = (b << 8) | b;
707 noFaultXAllocColor( client, v->display,
708 cmap, GET_COLORMAP_SIZE(v),
709 &xcol, &exact, &alloced );
710 if (!exact) {
711 colorsfailed++;
712 }
713 if (alloced) {
714 assert(buffer->num_alloced<256);
715 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
716 buffer->num_alloced++;
717 }
718
719 /*OLD
720 assert(gray < 576);
721 buffer->color_table[gray*3+0] = xcol.pixel;
722 buffer->color_table[gray*3+1] = xcol.pixel;
723 buffer->color_table[gray*3+2] = xcol.pixel;
724 assert(xcol.pixel < 65536);
725 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
726 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
727 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
728 */
729 buffer->color_table[gray] = xcol.pixel;
730 assert(xcol.pixel < 65536);
731 buffer->pixel_to_r[xcol.pixel] = gray;
732 buffer->pixel_to_g[xcol.pixel] = gray;
733 buffer->pixel_to_b[xcol.pixel] = gray;
734 }
735
736 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
737 _mesa_warning(NULL,
738 "Note: %d out of 256 needed colors do not match exactly.\n",
739 colorsfailed );
740 }
741 }
742 }
743
744 v->dithered_pf = PF_Grayscale;
745 v->undithered_pf = PF_Grayscale;
746 return GL_TRUE;
747 }
748
749
750
751 /**
752 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
753 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
754 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
755 * color. While this function was originally designed just for 8-bit
756 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
757 * Dithering code contributed by Bob Mercier.
758 */
759 static GLboolean
760 setup_dithered_color(int client, XMesaVisual v,
761 XMesaBuffer buffer, XMesaColormap cmap)
762 {
763 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
764 return GL_FALSE;
765 }
766
767 if (buffer) {
768 XMesaBuffer prevBuffer;
769
770 if (!cmap) {
771 return GL_FALSE;
772 }
773
774 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
775 if (prevBuffer &&
776 (buffer->xm_visual->mesa_visual.rgbMode ==
777 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
778 /* Copy colormap stuff from previous, matching XMesaBuffer.
779 * Do this to avoid time spent in noFaultXAllocColor.
780 */
781 copy_colortable_info(buffer, prevBuffer);
782 }
783 else {
784 /* Allocate X colors and initialize color_table[], red_table[], etc */
785 int r, g, b, i;
786 int colorsfailed = 0;
787 for (r = 0; r < DITH_R; r++) {
788 for (g = 0; g < DITH_G; g++) {
789 for (b = 0; b < DITH_B; b++) {
790 XMesaColor xcol;
791 int exact, alloced;
792 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535);
793 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535);
794 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535);
795 noFaultXAllocColor( client, v->display,
796 cmap, GET_COLORMAP_SIZE(v),
797 &xcol, &exact, &alloced );
798 if (!exact) {
799 colorsfailed++;
800 }
801 if (alloced) {
802 assert(buffer->num_alloced<256);
803 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
804 buffer->num_alloced++;
805 }
806 i = DITH_MIX( r, g, b );
807 assert(i < 576);
808 buffer->color_table[i] = xcol.pixel;
809 assert(xcol.pixel < 65536);
810 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1);
811 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1);
812 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1);
813 }
814 }
815 }
816
817 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
818 _mesa_warning(NULL,
819 "Note: %d out of %d needed colors do not match exactly.\n",
820 colorsfailed, DITH_R * DITH_G * DITH_B );
821 }
822 }
823 }
824
825 v->dithered_pf = PF_Dither;
826 v->undithered_pf = PF_Lookup;
827 return GL_TRUE;
828 }
829
830
831 /**
832 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
833 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
834 * Special dithering tables have to be initialized.
835 */
836 static void
837 setup_8bit_hpcr(XMesaVisual v)
838 {
839 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
840 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
841 * on the root window AND the colormap obtainable by XGetRGBColormaps
842 * for that atom must be set on the window. (see also tkInitWindow)
843 * If that colormap is not set, the output will look stripy.
844 */
845
846 /* Setup color tables with gamma correction */
847 int i;
848 double g;
849
850 g = 1.0 / v->RedGamma;
851 for (i=0; i<256; i++) {
852 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g ));
853 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 );
854 }
855
856 g = 1.0 / v->GreenGamma;
857 for (i=0; i<256; i++) {
858 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g ));
859 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 );
860 }
861
862 g = 1.0 / v->BlueGamma;
863 for (i=0; i<256; i++) {
864 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g ));
865 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 );
866 }
867 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */
868 v->dithered_pf = PF_HPCR;
869
870 /* which method should I use to clear */
871 /* GL_FALSE: keep the ordinary method */
872 /* GL_TRUE : clear with dither pattern */
873 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE;
874
875 if (v->hpcr_clear_flag) {
876 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display,
877 DefaultRootWindow(v->display),
878 16, 2, 8);
879 #ifndef XFree86Server
880 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap,
881 0, 0, 16, 2, AllPlanes, ZPixmap);
882 #endif
883 }
884 }
885
886
887 /**
888 * Setup RGB rendering for a window with a True/DirectColor visual.
889 */
890 static void
891 setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
892 {
893 unsigned long rmask, gmask, bmask;
894 (void) buffer;
895 (void) cmap;
896
897 /* Compute red multiplier (mask) and bit shift */
898 v->rshift = 0;
899 rmask = GET_REDMASK(v);
900 while ((rmask & 1)==0) {
901 v->rshift++;
902 rmask = rmask >> 1;
903 }
904
905 /* Compute green multiplier (mask) and bit shift */
906 v->gshift = 0;
907 gmask = GET_GREENMASK(v);
908 while ((gmask & 1)==0) {
909 v->gshift++;
910 gmask = gmask >> 1;
911 }
912
913 /* Compute blue multiplier (mask) and bit shift */
914 v->bshift = 0;
915 bmask = GET_BLUEMASK(v);
916 while ((bmask & 1)==0) {
917 v->bshift++;
918 bmask = bmask >> 1;
919 }
920
921 /*
922 * Compute component-to-pixel lookup tables and dithering kernel
923 */
924 {
925 static GLubyte kernel[16] = {
926 0*16, 8*16, 2*16, 10*16,
927 12*16, 4*16, 14*16, 6*16,
928 3*16, 11*16, 1*16, 9*16,
929 15*16, 7*16, 13*16, 5*16,
930 };
931 GLint rBits = _mesa_bitcount(rmask);
932 GLint gBits = _mesa_bitcount(gmask);
933 GLint bBits = _mesa_bitcount(bmask);
934 GLint maxBits;
935 GLuint i;
936
937 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
938 for (i=0; i<=rmask; i++)
939 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
940 for (i=0; i<=gmask; i++)
941 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
942 for (i=0; i<=bmask; i++)
943 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
944
945 /* convert RGB values from [0,255] to pixel components */
946
947 for (i=0;i<256;i++) {
948 GLint r = gamma_adjust(v->RedGamma, i, 255);
949 GLint g = gamma_adjust(v->GreenGamma, i, 255);
950 GLint b = gamma_adjust(v->BlueGamma, i, 255);
951 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
952 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
953 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
954 }
955 /* overflow protection */
956 for (i=256;i<512;i++) {
957 v->RtoPixel[i] = v->RtoPixel[255];
958 v->GtoPixel[i] = v->GtoPixel[255];
959 v->BtoPixel[i] = v->BtoPixel[255];
960 }
961
962 /* setup dithering kernel */
963 maxBits = rBits;
964 if (gBits > maxBits) maxBits = gBits;
965 if (bBits > maxBits) maxBits = bBits;
966 for (i=0;i<16;i++) {
967 v->Kernel[i] = kernel[i] >> maxBits;
968 }
969
970 v->undithered_pf = PF_Truecolor;
971 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
972 }
973
974 /*
975 * Now check for TrueColor visuals which we can optimize.
976 */
977 if ( GET_REDMASK(v) ==0x0000ff
978 && GET_GREENMASK(v)==0x00ff00
979 && GET_BLUEMASK(v) ==0xff0000
980 && CHECK_BYTE_ORDER(v)
981 && v->BitsPerPixel==32
982 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
983 /* common 32 bpp config used on SGI, Sun */
984 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
985 }
986 else if (GET_REDMASK(v) == 0xff0000
987 && GET_GREENMASK(v)== 0x00ff00
988 && GET_BLUEMASK(v) == 0x0000ff
989 && CHECK_BYTE_ORDER(v)
990 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
991 if (v->BitsPerPixel==32) {
992 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
993 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
994 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
995 else
996 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
997 }
998 else if (v->BitsPerPixel == 24) {
999 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
1000 }
1001 }
1002 else if (GET_REDMASK(v) ==0xf800
1003 && GET_GREENMASK(v)==0x07e0
1004 && GET_BLUEMASK(v) ==0x001f
1005 && CHECK_BYTE_ORDER(v)
1006 && v->BitsPerPixel==16
1007 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1008 /* 5-6-5 RGB */
1009 v->undithered_pf = PF_5R6G5B;
1010 v->dithered_pf = PF_Dither_5R6G5B;
1011 }
1012 else if (GET_REDMASK(v) ==0xe0
1013 && GET_GREENMASK(v)==0x1c
1014 && GET_BLUEMASK(v) ==0x03
1015 && CHECK_FOR_HPCR(v)) {
1016 /* 8-bit HP color recovery */
1017 setup_8bit_hpcr( v );
1018 }
1019 }
1020
1021
1022
1023 /**
1024 * Setup RGB rendering for a window with a monochrome visual.
1025 */
1026 static void
1027 setup_monochrome( XMesaVisual v, XMesaBuffer b )
1028 {
1029 (void) b;
1030 v->dithered_pf = v->undithered_pf = PF_1Bit;
1031 /* if black=1 then we must flip pixel values */
1032 v->bitFlip = (GET_BLACK_PIXEL(v) != 0);
1033 }
1034
1035
1036
1037 /**
1038 * When a context is bound for the first time, we can finally finish
1039 * initializing the context's visual and buffer information.
1040 * \param v the XMesaVisual to initialize
1041 * \param b the XMesaBuffer to initialize (may be NULL)
1042 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1043 * \param window the window/pixmap we're rendering into
1044 * \param cmap the colormap associated with the window/pixmap
1045 * \return GL_TRUE=success, GL_FALSE=failure
1046 */
1047 static GLboolean
1048 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
1049 GLboolean rgb_flag, XMesaDrawable window,
1050 XMesaColormap cmap)
1051 {
1052 int client = 0;
1053
1054 #ifdef XFree86Server
1055 client = (window) ? CLIENT_ID(window->id) : 0;
1056 #endif
1057
1058 ASSERT(!b || b->xm_visual == v);
1059
1060 /* Save true bits/pixel */
1061 v->BitsPerPixel = bits_per_pixel(v);
1062 assert(v->BitsPerPixel > 0);
1063
1064 if (rgb_flag == GL_FALSE) {
1065 /* COLOR-INDEXED WINDOW:
1066 * Even if the visual is TrueColor or DirectColor we treat it as
1067 * being color indexed. This is weird but might be useful to someone.
1068 */
1069 v->dithered_pf = v->undithered_pf = PF_Index;
1070 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v);
1071 }
1072 else {
1073 /* RGB WINDOW:
1074 * We support RGB rendering into almost any kind of visual.
1075 */
1076 const int xclass = v->mesa_visual.visualType;
1077 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1078 setup_truecolor( v, b, cmap );
1079 }
1080 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) {
1081 setup_monochrome( v, b );
1082 }
1083 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) {
1084 if (!setup_grayscale( client, v, b, cmap )) {
1085 return GL_FALSE;
1086 }
1087 }
1088 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR)
1089 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) {
1090 if (!setup_dithered_color( client, v, b, cmap )) {
1091 return GL_FALSE;
1092 }
1093 }
1094 else {
1095 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
1096 return GL_FALSE;
1097 }
1098 v->mesa_visual.indexBits = 0;
1099
1100 if (_mesa_getenv("MESA_NO_DITHER")) {
1101 v->dithered_pf = v->undithered_pf;
1102 }
1103 }
1104
1105
1106 /*
1107 * If MESA_INFO env var is set print out some debugging info
1108 * which can help Brian figure out what's going on when a user
1109 * reports bugs.
1110 */
1111 if (_mesa_getenv("MESA_INFO")) {
1112 _mesa_printf("X/Mesa visual = %p\n", (void *) v);
1113 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
1114 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
1115 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level);
1116 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
1117 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
1118 }
1119
1120 if (b && window) {
1121 char *data;
1122
1123 /* Do window-specific initializations */
1124
1125 /* these should have been set in create_xmesa_buffer */
1126 ASSERT(b->frontxrb->drawable == window);
1127 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
1128
1129 /* Setup for single/double buffering */
1130 if (v->mesa_visual.doubleBufferMode) {
1131 /* Double buffered */
1132 b->shm = check_for_xshm( v->display );
1133 }
1134
1135 /* X11 graphics contexts */
1136 #ifdef XFree86Server
1137 b->gc = CreateScratchGC(v->display, window->depth);
1138 #else
1139 b->gc = XCreateGC( v->display, window, 0, NULL );
1140 #endif
1141 XMesaSetFunction( v->display, b->gc, GXcopy );
1142
1143 /* cleargc - for glClear() */
1144 #ifdef XFree86Server
1145 b->cleargc = CreateScratchGC(v->display, window->depth);
1146 #else
1147 b->cleargc = XCreateGC( v->display, window, 0, NULL );
1148 #endif
1149 XMesaSetFunction( v->display, b->cleargc, GXcopy );
1150
1151 /*
1152 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1153 * Patch contributed by Michael Pichler May 15, 1995.
1154 */
1155 #ifdef XFree86Server
1156 b->swapgc = CreateScratchGC(v->display, window->depth);
1157 {
1158 CARD32 v[1];
1159 v[0] = FALSE;
1160 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL);
1161 }
1162 #else
1163 {
1164 XGCValues gcvalues;
1165 gcvalues.graphics_exposures = False;
1166 b->swapgc = XCreateGC(v->display, window,
1167 GCGraphicsExposures, &gcvalues);
1168 }
1169 #endif
1170 XMesaSetFunction( v->display, b->swapgc, GXcopy );
1171 /*
1172 * Set fill style and tile pixmap once for all for HPCR stuff
1173 * (instead of doing it each time in clear_color_HPCR_pixmap())
1174 * Initialize whole stuff
1175 * Patch contributed by Jacques Leroy March 8, 1998.
1176 */
1177 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) {
1178 int i;
1179 for (i = 0; i < 16; i++) {
1180 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0);
1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0);
1182 }
1183 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap,
1184 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2);
1185 XMesaSetFillStyle( v->display, b->cleargc, FillTiled);
1186 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap );
1187 }
1188
1189 /* Initialize the row buffer XImage for use in write_color_span() */
1190 data = (char*) MALLOC(MAX_WIDTH*4);
1191 #ifdef XFree86Server
1192 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data);
1193 #else
1194 b->rowimage = XCreateImage( v->display,
1195 v->visinfo->visual,
1196 v->visinfo->depth,
1197 ZPixmap, 0, /*format, offset*/
1198 data, /*data*/
1199 MAX_WIDTH, 1, /*width, height*/
1200 32, /*bitmap_pad*/
1201 0 /*bytes_per_line*/ );
1202 #endif
1203 if (!b->rowimage)
1204 return GL_FALSE;
1205 }
1206
1207 return GL_TRUE;
1208 }
1209
1210
1211
1212 /*
1213 * Convert an RGBA color to a pixel value.
1214 */
1215 unsigned long
1216 xmesa_color_to_pixel(GLcontext *ctx,
1217 GLubyte r, GLubyte g, GLubyte b, GLubyte a,
1218 GLuint pixelFormat)
1219 {
1220 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1221 switch (pixelFormat) {
1222 case PF_Index:
1223 return 0;
1224 case PF_Truecolor:
1225 {
1226 unsigned long p;
1227 PACK_TRUECOLOR( p, r, g, b );
1228 return p;
1229 }
1230 case PF_8A8B8G8R:
1231 return PACK_8A8B8G8R( r, g, b, a );
1232 case PF_8A8R8G8B:
1233 return PACK_8A8R8G8B( r, g, b, a );
1234 case PF_8R8G8B:
1235 /* fall through */
1236 case PF_8R8G8B24:
1237 return PACK_8R8G8B( r, g, b );
1238 case PF_5R6G5B:
1239 return PACK_5R6G5B( r, g, b );
1240 case PF_Dither:
1241 {
1242 DITHER_SETUP;
1243 return DITHER( 1, 0, r, g, b );
1244 }
1245 case PF_1Bit:
1246 /* 382 = (3*255)/2 */
1247 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
1248 case PF_HPCR:
1249 return DITHER_HPCR(1, 1, r, g, b);
1250 case PF_Lookup:
1251 {
1252 LOOKUP_SETUP;
1253 return LOOKUP( r, g, b );
1254 }
1255 case PF_Grayscale:
1256 return GRAY_RGB( r, g, b );
1257 case PF_Dither_True:
1258 /* fall through */
1259 case PF_Dither_5R6G5B:
1260 {
1261 unsigned long p;
1262 PACK_TRUEDITHER(p, 1, 0, r, g, b);
1263 return p;
1264 }
1265 default:
1266 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
1267 }
1268 return 0;
1269 }
1270
1271
1272 #define NUM_VISUAL_TYPES 6
1273
1274 /**
1275 * Convert an X visual type to a GLX visual type.
1276 *
1277 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1278 * to be converted.
1279 * \return If \c visualType is a valid X visual type, a GLX visual type will
1280 * be returned. Otherwise \c GLX_NONE will be returned.
1281 *
1282 * \note
1283 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1284 * DRI CVS tree.
1285 */
1286 static GLint
1287 xmesa_convert_from_x_visual_type( int visualType )
1288 {
1289 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
1290 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
1291 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
1292 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
1293 };
1294
1295 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
1296 ? glx_visual_types[ visualType ] : GLX_NONE;
1297 }
1298
1299
1300 /**********************************************************************/
1301 /***** Public Functions *****/
1302 /**********************************************************************/
1303
1304
1305 #ifdef IN_DRI_DRIVER
1306 #define need_GL_VERSION_1_3
1307 #define need_GL_VERSION_1_4
1308 #define need_GL_VERSION_1_5
1309 #define need_GL_VERSION_2_0
1310
1311 /* sw extensions for imaging */
1312 #define need_GL_EXT_blend_color
1313 #define need_GL_EXT_blend_minmax
1314 #define need_GL_EXT_convolution
1315 #define need_GL_EXT_histogram
1316 #define need_GL_SGI_color_table
1317
1318 /* sw extensions not associated with some GL version */
1319 #define need_GL_ARB_draw_elements_base_vertex
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_depth_clamp", NULL },
1351 { "GL_ARB_draw_elements_base_vertex", GL_ARB_draw_elements_base_vertex_functions },
1352 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
1353 { "GL_ARB_sync", GL_ARB_sync_functions },
1354 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
1355 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
1356 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
1357 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
1358 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
1359 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
1360 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
1361 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
1362 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
1363 { "GL_NV_depth_clamp", NULL },
1364 { "GL_NV_vertex_program", GL_NV_vertex_program_functions },
1365 { "GL_NV_fragment_program", GL_NV_fragment_program_functions },
1366 { NULL, NULL }
1367 };
1368 #endif
1369
1370 /*
1371 * Create a new X/Mesa visual.
1372 * Input: display - X11 display
1373 * visinfo - an XVisualInfo pointer
1374 * rgb_flag - GL_TRUE = RGB mode,
1375 * GL_FALSE = color index mode
1376 * alpha_flag - alpha buffer requested?
1377 * db_flag - GL_TRUE = double-buffered,
1378 * GL_FALSE = single buffered
1379 * stereo_flag - stereo visual?
1380 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1381 * GL_FALSE = use an off-screen pixmap for back buffer
1382 * depth_size - requested bits/depth values, or zero
1383 * stencil_size - requested bits/stencil values, or zero
1384 * accum_red_size - requested bits/red accum values, or zero
1385 * accum_green_size - requested bits/green accum values, or zero
1386 * accum_blue_size - requested bits/blue accum values, or zero
1387 * accum_alpha_size - requested bits/alpha accum values, or zero
1388 * num_samples - number of samples/pixel if multisampling, or zero
1389 * level - visual level, usually 0
1390 * visualCaveat - ala the GLX extension, usually GLX_NONE
1391 * Return; a new XMesaVisual or 0 if error.
1392 */
1393 PUBLIC
1394 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1395 XMesaVisualInfo visinfo,
1396 GLboolean rgb_flag,
1397 GLboolean alpha_flag,
1398 GLboolean db_flag,
1399 GLboolean stereo_flag,
1400 GLboolean ximage_flag,
1401 GLint depth_size,
1402 GLint stencil_size,
1403 GLint accum_red_size,
1404 GLint accum_green_size,
1405 GLint accum_blue_size,
1406 GLint accum_alpha_size,
1407 GLint num_samples,
1408 GLint level,
1409 GLint visualCaveat )
1410 {
1411 char *gamma;
1412 XMesaVisual v;
1413 GLint red_bits, green_bits, blue_bits, alpha_bits;
1414
1415 #ifdef IN_DRI_DRIVER
1416 /* driInitExtensions() should be called once per screen to setup extension
1417 * indices. There is no need to call it when the context is created since
1418 * XMesa enables mesa sw extensions on its own.
1419 */
1420 driInitExtensions( NULL, card_extensions, GL_FALSE );
1421 #endif
1422
1423 #ifndef XFree86Server
1424 /* For debugging only */
1425 if (_mesa_getenv("MESA_XSYNC")) {
1426 /* This makes debugging X easier.
1427 * In your debugger, set a breakpoint on _XError to stop when an
1428 * X protocol error is generated.
1429 */
1430 XSynchronize( display, 1 );
1431 }
1432 #endif
1433
1434 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1435 if (!v) {
1436 return NULL;
1437 }
1438
1439 v->display = display;
1440
1441 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1442 * the struct but we may need some of the information contained in it
1443 * at a later time.
1444 */
1445 #ifndef XFree86Server
1446 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1447 if(!v->visinfo) {
1448 _mesa_free(v);
1449 return NULL;
1450 }
1451 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1452 #endif
1453
1454 /* check for MESA_GAMMA environment variable */
1455 gamma = _mesa_getenv("MESA_GAMMA");
1456 if (gamma) {
1457 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1458 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1459 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1460 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1461 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1462 }
1463 else {
1464 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1465 }
1466
1467 v->ximage_flag = ximage_flag;
1468
1469 #ifdef XFree86Server
1470 /* We could calculate these values by ourselves. nplanes is either the sum
1471 * of the red, green, and blue bits or the number index bits.
1472 * ColormapEntries is either (1U << index_bits) or
1473 * (1U << max(redBits, greenBits, blueBits)).
1474 */
1475 assert(visinfo->nplanes > 0);
1476 v->nplanes = visinfo->nplanes;
1477 v->ColormapEntries = visinfo->ColormapEntries;
1478
1479 v->mesa_visual.redMask = visinfo->redMask;
1480 v->mesa_visual.greenMask = visinfo->greenMask;
1481 v->mesa_visual.blueMask = visinfo->blueMask;
1482 v->mesa_visual.visualID = visinfo->vid;
1483 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */
1484 #else
1485 v->mesa_visual.redMask = visinfo->red_mask;
1486 v->mesa_visual.greenMask = visinfo->green_mask;
1487 v->mesa_visual.blueMask = visinfo->blue_mask;
1488 v->mesa_visual.visualID = visinfo->visualid;
1489 v->mesa_visual.screen = visinfo->screen;
1490 #endif
1491
1492 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1493 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
1494 #else
1495 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
1496 #endif
1497
1498 v->mesa_visual.visualRating = visualCaveat;
1499
1500 if (alpha_flag)
1501 v->mesa_visual.alphaBits = 8;
1502
1503 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
1504
1505 {
1506 const int xclass = v->mesa_visual.visualType;
1507 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1508 red_bits = _mesa_bitcount(GET_REDMASK(v));
1509 green_bits = _mesa_bitcount(GET_GREENMASK(v));
1510 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
1511 }
1512 else {
1513 /* this is an approximation */
1514 int depth;
1515 depth = GET_VISUAL_DEPTH(v);
1516 red_bits = depth / 3;
1517 depth -= red_bits;
1518 green_bits = depth / 2;
1519 depth -= green_bits;
1520 blue_bits = depth;
1521 alpha_bits = 0;
1522 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1523 }
1524 alpha_bits = v->mesa_visual.alphaBits;
1525 }
1526
1527 _mesa_initialize_visual( &v->mesa_visual,
1528 rgb_flag, db_flag, stereo_flag,
1529 red_bits, green_bits,
1530 blue_bits, alpha_bits,
1531 v->mesa_visual.indexBits,
1532 depth_size,
1533 stencil_size,
1534 accum_red_size, accum_green_size,
1535 accum_blue_size, accum_alpha_size,
1536 0 );
1537
1538 /* XXX minor hack */
1539 v->mesa_visual.level = level;
1540 return v;
1541 }
1542
1543
1544 PUBLIC
1545 void XMesaDestroyVisual( XMesaVisual v )
1546 {
1547 #ifndef XFree86Server
1548 _mesa_free(v->visinfo);
1549 #endif
1550 _mesa_free(v);
1551 }
1552
1553
1554
1555 /**
1556 * Create a new XMesaContext.
1557 * \param v the XMesaVisual
1558 * \param share_list another XMesaContext with which to share display
1559 * lists or NULL if no sharing is wanted.
1560 * \return an XMesaContext or NULL if error.
1561 */
1562 PUBLIC
1563 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1564 {
1565 static GLboolean firstTime = GL_TRUE;
1566 XMesaContext c;
1567 GLcontext *mesaCtx;
1568 struct dd_function_table functions;
1569 TNLcontext *tnl;
1570
1571 if (firstTime) {
1572 _glthread_INIT_MUTEX(_xmesa_lock);
1573 firstTime = GL_FALSE;
1574 }
1575
1576 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1577 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1578 if (!c)
1579 return NULL;
1580
1581 mesaCtx = &(c->mesa);
1582
1583 /* initialize with default driver functions, then plug in XMesa funcs */
1584 _mesa_init_driver_functions(&functions);
1585 xmesa_init_driver_functions(v, &functions);
1586 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
1587 share_list ? &(share_list->mesa) : (GLcontext *) NULL,
1588 &functions, (void *) c)) {
1589 _mesa_free(c);
1590 return NULL;
1591 }
1592
1593 /* Enable this to exercise fixed function -> shader translation
1594 * with software rendering.
1595 */
1596 if (0) {
1597 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE;
1598 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
1599 }
1600
1601 _mesa_enable_sw_extensions(mesaCtx);
1602 _mesa_enable_1_3_extensions(mesaCtx);
1603 _mesa_enable_1_4_extensions(mesaCtx);
1604 _mesa_enable_1_5_extensions(mesaCtx);
1605 _mesa_enable_2_0_extensions(mesaCtx);
1606 _mesa_enable_2_1_extensions(mesaCtx);
1607 #if ENABLE_EXT_texure_compression_s3tc
1608 if (mesaCtx->Mesa_DXTn) {
1609 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
1610 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
1611 }
1612 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
1613 #endif
1614 #if ENABLE_EXT_timer_query
1615 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
1616 #endif
1617
1618 #ifdef XFree86Server
1619 /* If we're running in the X server, do bounds checking to prevent
1620 * segfaults and server crashes!
1621 */
1622 mesaCtx->Const.CheckArrayBounds = GL_TRUE;
1623 #endif
1624
1625 /* finish up xmesa context initializations */
1626 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
1627 c->xm_visual = v;
1628 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1629 c->display = v->display;
1630 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1631
1632 /* Initialize the software rasterizer and helper modules.
1633 */
1634 if (!_swrast_CreateContext( mesaCtx ) ||
1635 !_vbo_CreateContext( mesaCtx ) ||
1636 !_tnl_CreateContext( mesaCtx ) ||
1637 !_swsetup_CreateContext( mesaCtx )) {
1638 _mesa_free_context_data(&c->mesa);
1639 _mesa_free(c);
1640 return NULL;
1641 }
1642
1643 /* tnl setup */
1644 tnl = TNL_CONTEXT(mesaCtx);
1645 tnl->Driver.RunPipeline = _tnl_run_pipeline;
1646 /* swrast setup */
1647 xmesa_register_swrast_functions( mesaCtx );
1648 _swsetup_Wakeup(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 _swsetup_DestroyContext( mesaCtx );
1665 _swrast_DestroyContext( mesaCtx );
1666 _tnl_DestroyContext( mesaCtx );
1667 _vbo_DestroyContext( mesaCtx );
1668 _mesa_free_context_data( mesaCtx );
1669 _mesa_free( c );
1670 }
1671
1672
1673
1674 /**
1675 * Private function for creating an XMesaBuffer which corresponds to an
1676 * X window or pixmap.
1677 * \param v the window's XMesaVisual
1678 * \param w the window we're wrapping
1679 * \return new XMesaBuffer or NULL if error
1680 */
1681 PUBLIC XMesaBuffer
1682 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
1683 {
1684 #ifndef XFree86Server
1685 XWindowAttributes attr;
1686 #endif
1687 XMesaBuffer b;
1688 XMesaColormap cmap;
1689 int depth;
1690
1691 assert(v);
1692 assert(w);
1693
1694 /* Check that window depth matches visual depth */
1695 #ifdef XFree86Server
1696 depth = ((XMesaDrawable)w)->depth;
1697 #else
1698 XGetWindowAttributes( v->display, w, &attr );
1699 depth = attr.depth;
1700 #endif
1701 if (GET_VISUAL_DEPTH(v) != depth) {
1702 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1703 GET_VISUAL_DEPTH(v), depth);
1704 return NULL;
1705 }
1706
1707 /* Find colormap */
1708 #ifdef XFree86Server
1709 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1710 #else
1711 if (attr.colormap) {
1712 cmap = attr.colormap;
1713 }
1714 else {
1715 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1716 /* this is weird, a window w/out a colormap!? */
1717 /* OK, let's just allocate a new one and hope for the best */
1718 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1719 }
1720 #endif
1721
1722 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1723 if (!b)
1724 return NULL;
1725
1726 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1727 (XMesaDrawable) w, cmap )) {
1728 xmesa_free_buffer(b);
1729 return NULL;
1730 }
1731
1732 return b;
1733 }
1734
1735
1736
1737 /**
1738 * Create a new XMesaBuffer from an X pixmap.
1739 *
1740 * \param v the XMesaVisual
1741 * \param p the pixmap
1742 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1743 * \c GLX_DIRECT_COLOR visual for the pixmap
1744 * \returns new XMesaBuffer or NULL if error
1745 */
1746 PUBLIC XMesaBuffer
1747 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1748 {
1749 XMesaBuffer b;
1750
1751 assert(v);
1752
1753 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1754 if (!b)
1755 return NULL;
1756
1757 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1758 (XMesaDrawable) p, cmap)) {
1759 xmesa_free_buffer(b);
1760 return NULL;
1761 }
1762
1763 return b;
1764 }
1765
1766
1767 /**
1768 * For GLX_EXT_texture_from_pixmap
1769 */
1770 XMesaBuffer
1771 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1772 XMesaColormap cmap,
1773 int format, int target, int mipmap)
1774 {
1775 GET_CURRENT_CONTEXT(ctx);
1776 XMesaBuffer b;
1777 GLuint width, height;
1778
1779 assert(v);
1780
1781 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1782 if (!b)
1783 return NULL;
1784
1785 /* get pixmap size, update framebuffer/renderbuffer dims */
1786 xmesa_get_window_size(v->display, b, &width, &height);
1787 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1788
1789 if (target == 0) {
1790 /* examine dims */
1791 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1792 target = GLX_TEXTURE_2D_EXT;
1793 }
1794 else if ( _mesa_bitcount(width) == 1
1795 && _mesa_bitcount(height) == 1) {
1796 /* power of two size */
1797 if (height == 1) {
1798 target = GLX_TEXTURE_1D_EXT;
1799 }
1800 else {
1801 target = GLX_TEXTURE_2D_EXT;
1802 }
1803 }
1804 else if (ctx->Extensions.NV_texture_rectangle) {
1805 target = GLX_TEXTURE_RECTANGLE_EXT;
1806 }
1807 else {
1808 /* non power of two textures not supported */
1809 XMesaDestroyBuffer(b);
1810 return 0;
1811 }
1812 }
1813
1814 b->TextureTarget = target;
1815 b->TextureFormat = format;
1816 b->TextureMipmap = mipmap;
1817
1818 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1819 (XMesaDrawable) p, cmap)) {
1820 xmesa_free_buffer(b);
1821 return NULL;
1822 }
1823
1824 return b;
1825 }
1826
1827
1828
1829 XMesaBuffer
1830 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1831 unsigned int width, unsigned int height)
1832 {
1833 #ifndef XFree86Server
1834 XMesaWindow root;
1835 XMesaDrawable drawable; /* X Pixmap Drawable */
1836 XMesaBuffer b;
1837
1838 /* allocate pixmap for front buffer */
1839 root = RootWindow( v->display, v->visinfo->screen );
1840 drawable = XCreatePixmap(v->display, root, width, height,
1841 v->visinfo->depth);
1842 if (!drawable)
1843 return NULL;
1844
1845 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1846 if (!b)
1847 return NULL;
1848
1849 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1850 drawable, cmap)) {
1851 xmesa_free_buffer(b);
1852 return NULL;
1853 }
1854
1855 return b;
1856 #else
1857 return 0;
1858 #endif
1859 }
1860
1861
1862
1863 /*
1864 * Deallocate an XMesaBuffer structure and all related info.
1865 */
1866 PUBLIC void
1867 XMesaDestroyBuffer(XMesaBuffer b)
1868 {
1869 xmesa_free_buffer(b);
1870 }
1871
1872
1873 /**
1874 * Query the current window size and update the corresponding GLframebuffer
1875 * and all attached renderbuffers.
1876 * Called when:
1877 * 1. the first time a buffer is bound to a context.
1878 * 2. from glViewport to poll for window size changes
1879 * 3. from the XMesaResizeBuffers() API function.
1880 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1881 * when resizing a buffer when no rendering context is bound.
1882 */
1883 void
1884 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1885 {
1886 GLuint width, height;
1887 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1888 if (drawBuffer->mesa_buffer.Width != width ||
1889 drawBuffer->mesa_buffer.Height != height) {
1890 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
1891 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1892 }
1893 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1894 }
1895
1896
1897 /*
1898 * Bind buffer b to context c and make c the current rendering context.
1899 */
1900 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1901 {
1902 return XMesaMakeCurrent2( c, b, b );
1903 }
1904
1905
1906 /*
1907 * Bind buffer b to context c and make c the current rendering context.
1908 */
1909 PUBLIC
1910 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1911 XMesaBuffer readBuffer )
1912 {
1913 if (c) {
1914 if (!drawBuffer || !readBuffer)
1915 return GL_FALSE; /* must specify buffers! */
1916
1917 if (&(c->mesa) == _mesa_get_current_context()
1918 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1919 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1920 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1921 /* same context and buffer, do nothing */
1922 return GL_TRUE;
1923 }
1924
1925 c->xm_buffer = drawBuffer;
1926
1927 #ifdef FX
1928 if (FXmakeCurrent( drawBuffer ))
1929 return GL_TRUE;
1930 #endif
1931
1932 /* Call this periodically to detect when the user has begun using
1933 * GL rendering from multiple threads.
1934 */
1935 _glapi_check_multithread();
1936
1937 xmesa_check_and_update_buffer_size(c, drawBuffer);
1938 if (readBuffer != drawBuffer)
1939 xmesa_check_and_update_buffer_size(c, readBuffer);
1940
1941 _mesa_make_current(&(c->mesa),
1942 &drawBuffer->mesa_buffer,
1943 &readBuffer->mesa_buffer);
1944
1945 if (c->xm_visual->mesa_visual.rgbMode) {
1946 /*
1947 * Must recompute and set these pixel values because colormap
1948 * can be different for different windows.
1949 */
1950 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1951 c->clearcolor[0],
1952 c->clearcolor[1],
1953 c->clearcolor[2],
1954 c->clearcolor[3],
1955 c->xm_visual->undithered_pf);
1956 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1957 }
1958
1959 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1960 drawBuffer->wasCurrent = GL_TRUE;
1961 }
1962 else {
1963 /* Detach */
1964 _mesa_make_current( NULL, NULL, NULL );
1965 }
1966 return GL_TRUE;
1967 }
1968
1969
1970 /*
1971 * Unbind the context c from its buffer.
1972 */
1973 GLboolean XMesaUnbindContext( XMesaContext c )
1974 {
1975 /* A no-op for XFree86 integration purposes */
1976 return GL_TRUE;
1977 }
1978
1979
1980 XMesaContext XMesaGetCurrentContext( void )
1981 {
1982 GET_CURRENT_CONTEXT(ctx);
1983 if (ctx) {
1984 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1985 return xmesa;
1986 }
1987 else {
1988 return 0;
1989 }
1990 }
1991
1992
1993 XMesaBuffer XMesaGetCurrentBuffer( void )
1994 {
1995 GET_CURRENT_CONTEXT(ctx);
1996 if (ctx) {
1997 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
1998 return xmbuf;
1999 }
2000 else {
2001 return 0;
2002 }
2003 }
2004
2005
2006 /* New in Mesa 3.1 */
2007 XMesaBuffer XMesaGetCurrentReadBuffer( void )
2008 {
2009 GET_CURRENT_CONTEXT(ctx);
2010 if (ctx) {
2011 return XMESA_BUFFER(ctx->ReadBuffer);
2012 }
2013 else {
2014 return 0;
2015 }
2016 }
2017
2018
2019 #ifdef XFree86Server
2020 PUBLIC
2021 GLboolean XMesaForceCurrent(XMesaContext c)
2022 {
2023 if (c) {
2024 _glapi_set_dispatch(c->mesa.CurrentDispatch);
2025
2026 if (&(c->mesa) != _mesa_get_current_context()) {
2027 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer);
2028 }
2029 }
2030 else {
2031 _mesa_make_current(NULL, NULL, NULL);
2032 }
2033 return GL_TRUE;
2034 }
2035
2036
2037 PUBLIC
2038 GLboolean XMesaLoseCurrent(XMesaContext c)
2039 {
2040 (void) c;
2041 _mesa_make_current(NULL, NULL, NULL);
2042 return GL_TRUE;
2043 }
2044
2045
2046 PUBLIC
2047 GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask )
2048 {
2049 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
2050 return GL_TRUE;
2051 }
2052 #endif /* XFree86Server */
2053
2054
2055 #ifndef FX
2056 GLboolean XMesaSetFXmode( GLint mode )
2057 {
2058 (void) mode;
2059 return GL_FALSE;
2060 }
2061 #endif
2062
2063
2064
2065 /*
2066 * Copy the back buffer to the front buffer. If there's no back buffer
2067 * this is a no-op.
2068 */
2069 PUBLIC
2070 void XMesaSwapBuffers( XMesaBuffer b )
2071 {
2072 GET_CURRENT_CONTEXT(ctx);
2073
2074 if (!b->backxrb) {
2075 /* single buffered */
2076 return;
2077 }
2078
2079 /* If we're swapping the buffer associated with the current context
2080 * we have to flush any pending rendering commands first.
2081 */
2082 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2083 _mesa_notifySwapBuffers(ctx);
2084
2085 if (b->db_mode) {
2086 #ifdef FX
2087 if (FXswapBuffers(b))
2088 return;
2089 #endif
2090 if (b->backxrb->ximage) {
2091 /* Copy Ximage (back buf) from client memory to server window */
2092 #if defined(USE_XSHM) && !defined(XFree86Server)
2093 if (b->shm) {
2094 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2095 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2096 b->swapgc,
2097 b->backxrb->ximage, 0, 0,
2098 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2099 False );
2100 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2101 }
2102 else
2103 #endif
2104 {
2105 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2106 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2107 b->swapgc,
2108 b->backxrb->ximage, 0, 0,
2109 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
2110 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2111 }
2112 }
2113 else if (b->backxrb->pixmap) {
2114 /* Copy pixmap (back buf) to window (front buf) on server */
2115 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2116 XMesaCopyArea( b->xm_visual->display,
2117 b->backxrb->pixmap, /* source drawable */
2118 b->frontxrb->drawable, /* dest. drawable */
2119 b->swapgc,
2120 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2121 0, 0 /* dest region */
2122 );
2123 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2124 }
2125
2126 if (b->swAlpha)
2127 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer);
2128 }
2129 #if !defined(XFree86Server)
2130 XSync( b->xm_visual->display, False );
2131 #endif
2132 }
2133
2134
2135
2136 /*
2137 * Copy sub-region of back buffer to front buffer
2138 */
2139 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2140 {
2141 GET_CURRENT_CONTEXT(ctx);
2142
2143 /* If we're swapping the buffer associated with the current context
2144 * we have to flush any pending rendering commands first.
2145 */
2146 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2147 _mesa_notifySwapBuffers(ctx);
2148
2149 if (!b->backxrb) {
2150 /* single buffered */
2151 return;
2152 }
2153
2154 if (b->db_mode) {
2155 int yTop = b->mesa_buffer.Height - y - height;
2156 #ifdef FX
2157 if (FXswapBuffers(b))
2158 return;
2159 #endif
2160 if (b->backxrb->ximage) {
2161 /* Copy Ximage from host's memory to server's window */
2162 #if defined(USE_XSHM) && !defined(XFree86Server)
2163 if (b->shm) {
2164 /* XXX assuming width and height aren't too large! */
2165 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2166 b->swapgc,
2167 b->backxrb->ximage, x, yTop,
2168 x, yTop, width, height, False );
2169 /* wait for finished event??? */
2170 }
2171 else
2172 #endif
2173 {
2174 /* XXX assuming width and height aren't too large! */
2175 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2176 b->swapgc,
2177 b->backxrb->ximage, x, yTop,
2178 x, yTop, width, height );
2179 }
2180 }
2181 else {
2182 /* Copy pixmap to window on server */
2183 XMesaCopyArea( b->xm_visual->display,
2184 b->backxrb->pixmap, /* source drawable */
2185 b->frontxrb->drawable, /* dest. drawable */
2186 b->swapgc,
2187 x, yTop, width, height, /* source region */
2188 x, yTop /* dest region */
2189 );
2190 }
2191 }
2192 }
2193
2194
2195 /*
2196 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2197 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2198 * back buffer directly.
2199 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2200 * ximage - pointer to back buffer's XImage, or NULL
2201 * Return: GL_TRUE = context is double buffered
2202 * GL_FALSE = context is single buffered
2203 */
2204 #ifndef XFree86Server
2205 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2206 XMesaPixmap *pixmap,
2207 XMesaImage **ximage )
2208 {
2209 if (b->db_mode) {
2210 if (pixmap)
2211 *pixmap = b->backxrb->pixmap;
2212 if (ximage)
2213 *ximage = b->backxrb->ximage;
2214 return GL_TRUE;
2215 }
2216 else {
2217 *pixmap = 0;
2218 *ximage = NULL;
2219 return GL_FALSE;
2220 }
2221 }
2222 #endif /* XFree86Server */
2223
2224
2225 /*
2226 * Return the depth buffer associated with an XMesaBuffer.
2227 * Input: b - the XMesa buffer handle
2228 * Output: width, height - size of buffer in pixels
2229 * bytesPerValue - bytes per depth value (2 or 4)
2230 * buffer - pointer to depth buffer values
2231 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2232 */
2233 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2234 GLint *bytesPerValue, void **buffer )
2235 {
2236 struct gl_renderbuffer *rb
2237 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
2238 if (!rb || !rb->Data) {
2239 *width = 0;
2240 *height = 0;
2241 *bytesPerValue = 0;
2242 *buffer = 0;
2243 return GL_FALSE;
2244 }
2245 else {
2246 *width = b->mesa_buffer.Width;
2247 *height = b->mesa_buffer.Height;
2248 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
2249 ? sizeof(GLushort) : sizeof(GLuint);
2250 *buffer = rb->Data;
2251 return GL_TRUE;
2252 }
2253 }
2254
2255
2256 void XMesaFlush( XMesaContext c )
2257 {
2258 if (c && c->xm_visual) {
2259 #ifdef XFree86Server
2260 /* NOT_NEEDED */
2261 #else
2262 XSync( c->xm_visual->display, False );
2263 #endif
2264 }
2265 }
2266
2267
2268
2269 const char *XMesaGetString( XMesaContext c, int name )
2270 {
2271 (void) c;
2272 if (name==XMESA_VERSION) {
2273 return "5.0";
2274 }
2275 else if (name==XMESA_EXTENSIONS) {
2276 return "";
2277 }
2278 else {
2279 return NULL;
2280 }
2281 }
2282
2283
2284
2285 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2286 {
2287 XMesaBuffer b;
2288 for (b=XMesaBufferList; b; b=b->Next) {
2289 if (b->frontxrb->drawable == d && b->display == dpy) {
2290 return b;
2291 }
2292 }
2293 return NULL;
2294 }
2295
2296
2297 /**
2298 * Free/destroy all XMesaBuffers associated with given display.
2299 */
2300 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
2301 {
2302 XMesaBuffer b, next;
2303 for (b = XMesaBufferList; b; b = next) {
2304 next = b->Next;
2305 if (b->display == dpy) {
2306 xmesa_free_buffer(b);
2307 }
2308 }
2309 }
2310
2311
2312 /*
2313 * Look for XMesaBuffers whose X window has been destroyed.
2314 * Deallocate any such XMesaBuffers.
2315 */
2316 void XMesaGarbageCollect( void )
2317 {
2318 XMesaBuffer b, next;
2319 for (b=XMesaBufferList; b; b=next) {
2320 next = b->Next;
2321 if (b->display && b->frontxrb->drawable && b->type == WINDOW) {
2322 #ifdef XFree86Server
2323 /* NOT_NEEDED */
2324 #else
2325 XSync(b->display, False);
2326 if (!window_exists( b->display, b->frontxrb->drawable )) {
2327 /* found a dead window, free the ancillary info */
2328 XMesaDestroyBuffer( b );
2329 }
2330 #endif
2331 }
2332 }
2333 }
2334
2335
2336 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2337 GLfloat red, GLfloat green,
2338 GLfloat blue, GLfloat alpha )
2339 {
2340 GLcontext *ctx = &xmesa->mesa;
2341 GLint r = (GLint) (red * 255.0F);
2342 GLint g = (GLint) (green * 255.0F);
2343 GLint b = (GLint) (blue * 255.0F);
2344 GLint a = (GLint) (alpha * 255.0F);
2345
2346 switch (xmesa->pixelformat) {
2347 case PF_Index:
2348 return 0;
2349 case PF_Truecolor:
2350 {
2351 unsigned long p;
2352 PACK_TRUECOLOR( p, r, g, b );
2353 return p;
2354 }
2355 case PF_8A8B8G8R:
2356 return PACK_8A8B8G8R( r, g, b, a );
2357 case PF_8A8R8G8B:
2358 return PACK_8A8R8G8B( r, g, b, a );
2359 case PF_8R8G8B:
2360 return PACK_8R8G8B( r, g, b );
2361 case PF_5R6G5B:
2362 return PACK_5R6G5B( r, g, b );
2363 case PF_Dither:
2364 {
2365 DITHER_SETUP;
2366 return DITHER( x, y, r, g, b );
2367 }
2368 case PF_1Bit:
2369 /* 382 = (3*255)/2 */
2370 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2371 case PF_HPCR:
2372 return DITHER_HPCR(x, y, r, g, b);
2373 case PF_Lookup:
2374 {
2375 LOOKUP_SETUP;
2376 return LOOKUP( r, g, b );
2377 }
2378 case PF_Grayscale:
2379 return GRAY_RGB( r, g, b );
2380 case PF_Dither_5R6G5B:
2381 /* fall through */
2382 case PF_Dither_True:
2383 {
2384 unsigned long p;
2385 PACK_TRUEDITHER(p, x, y, r, g, b);
2386 return p;
2387 }
2388 default:
2389 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
2390 }
2391 return 0;
2392 }
2393
2394
2395 /*
2396 * This is typically called when the window size changes and we need
2397 * to reallocate the buffer's back/depth/stencil/accum buffers.
2398 */
2399 PUBLIC void
2400 XMesaResizeBuffers( XMesaBuffer b )
2401 {
2402 GET_CURRENT_CONTEXT(ctx);
2403 XMesaContext xmctx = XMESA_CONTEXT(ctx);
2404 if (!xmctx)
2405 return;
2406 xmesa_check_and_update_buffer_size(xmctx, b);
2407 }
2408
2409
2410 static GLint
2411 xbuffer_to_renderbuffer(int buffer)
2412 {
2413 assert(MAX_AUX_BUFFERS <= 4);
2414
2415 switch (buffer) {
2416 case GLX_FRONT_LEFT_EXT:
2417 return BUFFER_FRONT_LEFT;
2418 case GLX_FRONT_RIGHT_EXT:
2419 return BUFFER_FRONT_RIGHT;
2420 case GLX_BACK_LEFT_EXT:
2421 return BUFFER_BACK_LEFT;
2422 case GLX_BACK_RIGHT_EXT:
2423 return BUFFER_BACK_RIGHT;
2424 case GLX_AUX0_EXT:
2425 return BUFFER_AUX0;
2426 case GLX_AUX1_EXT:
2427 case GLX_AUX2_EXT:
2428 case GLX_AUX3_EXT:
2429 case GLX_AUX4_EXT:
2430 case GLX_AUX5_EXT:
2431 case GLX_AUX6_EXT:
2432 case GLX_AUX7_EXT:
2433 case GLX_AUX8_EXT:
2434 case GLX_AUX9_EXT:
2435 default:
2436 /* BadValue error */
2437 return -1;
2438 }
2439 }
2440
2441
2442 PUBLIC void
2443 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
2444 const int *attrib_list)
2445 {
2446 #if 0
2447 GET_CURRENT_CONTEXT(ctx);
2448 const GLuint unit = ctx->Texture.CurrentUnit;
2449 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
2450 struct gl_texture_object *texObj;
2451 #endif
2452 struct gl_renderbuffer *rb;
2453 struct xmesa_renderbuffer *xrb;
2454 GLint b;
2455 XMesaImage *img = NULL;
2456 GLboolean freeImg = GL_FALSE;
2457
2458 b = xbuffer_to_renderbuffer(buffer);
2459 if (b < 0)
2460 return;
2461
2462 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
2463 return; /* BadMatch error */
2464
2465 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
2466 if (!rb) {
2467 /* invalid buffer */
2468 return;
2469 }
2470 xrb = xmesa_renderbuffer(rb);
2471
2472 #if 0
2473 switch (drawable->TextureTarget) {
2474 case GLX_TEXTURE_1D_EXT:
2475 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
2476 break;
2477 case GLX_TEXTURE_2D_EXT:
2478 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
2479 break;
2480 case GLX_TEXTURE_RECTANGLE_EXT:
2481 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
2482 break;
2483 default:
2484 return; /* BadMatch error */
2485 }
2486 #endif
2487
2488 /*
2489 * The following is a quick and simple way to implement
2490 * BindTexImage. The better way is to write some new FetchTexel()
2491 * functions which would extract texels from XImages. We'd still
2492 * need to use GetImage when texturing from a Pixmap (front buffer)
2493 * but texturing from a back buffer (XImage) would avoid an image
2494 * copy.
2495 */
2496
2497 /* get XImage */
2498 if (xrb->pixmap) {
2499 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
2500 ZPixmap);
2501 freeImg = GL_TRUE;
2502 }
2503 else if (xrb->ximage) {
2504 img = xrb->ximage;
2505 }
2506
2507 /* store the XImage as a new texture image */
2508 if (img) {
2509 GLenum format, type, intFormat;
2510 if (img->bits_per_pixel == 32) {
2511 format = GL_BGRA;
2512 type = GL_UNSIGNED_BYTE;
2513 intFormat = GL_RGBA;
2514 }
2515 else if (img->bits_per_pixel == 24) {
2516 format = GL_BGR;
2517 type = GL_UNSIGNED_BYTE;
2518 intFormat = GL_RGB;
2519 }
2520 else if (img->bits_per_pixel == 16) {
2521 format = GL_BGR;
2522 type = GL_UNSIGNED_SHORT_5_6_5;
2523 intFormat = GL_RGB;
2524 }
2525 else {
2526 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
2527 return;
2528 }
2529 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2530 intFormat = GL_RGBA;
2531 }
2532 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
2533 intFormat = GL_RGB;
2534 }
2535
2536 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
2537 format, type, img->data);
2538
2539 if (freeImg) {
2540 XMesaDestroyImage(img);
2541 }
2542 }
2543 }
2544
2545
2546
2547 PUBLIC void
2548 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
2549 {
2550 const GLint b = xbuffer_to_renderbuffer(buffer);
2551 if (b < 0)
2552 return;
2553
2554 /* no-op for now */
2555 }
2556