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Merge branch 'mesa_7_6_branch'
[mesa.git] / src / mesa / drivers / x11 / xm_api.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file xm_api.c
27 *
28 * All the XMesa* API functions.
29 *
30 *
31 * NOTES:
32 *
33 * The window coordinate system origin (0,0) is in the lower-left corner
34 * of the window. X11's window coordinate origin is in the upper-left
35 * corner of the window. Therefore, most drawing functions in this
36 * file have to flip Y coordinates.
37 *
38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
39 * in support for the MIT Shared Memory extension. If enabled, when you
40 * use an Ximage for the back buffer in double buffered mode, the "swap"
41 * operation will be faster. You must also link with -lXext.
42 *
43 * Byte swapping: If the Mesa host and the X display use a different
44 * byte order then there's some trickiness to be aware of when using
45 * XImages. The byte ordering used for the XImage is that of the X
46 * display, not the Mesa host.
47 * The color-to-pixel encoding for True/DirectColor must be done
48 * according to the display's visual red_mask, green_mask, and blue_mask.
49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
50 * do byte swapping if needed. If one wants to directly "poke" the pixel
51 * into the XImage's buffer then the pixel must be byte swapped first. In
52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
53 * and use XPutPixel everywhere except in the implementation of
54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
55 * instead of using XPutPixel we "poke" our values after byte-swapping
56 * the clear pixel value if needed.
57 *
58 */
59
60 #ifdef __CYGWIN__
61 #undef WIN32
62 #undef __WIN32__
63 #endif
64
65 #include "glxheader.h"
66 #include "xmesaP.h"
67 #include "main/context.h"
68 #include "main/extensions.h"
69 #include "main/framebuffer.h"
70 #include "main/imports.h"
71 #include "main/macros.h"
72 #include "main/renderbuffer.h"
73 #include "main/teximage.h"
74 #include "glapi/glthread.h"
75 #include "swrast/swrast.h"
76 #include "swrast_setup/swrast_setup.h"
77 #include "vbo/vbo.h"
78 #include "tnl/tnl.h"
79 #include "tnl/t_context.h"
80 #include "tnl/t_pipeline.h"
81 #include "drivers/common/driverfuncs.h"
82 #include "drivers/common/meta.h"
83
84 /**
85 * Global X driver lock
86 */
87 _glthread_Mutex _xmesa_lock;
88
89
90
91 /**
92 * Lookup tables for HPCR pixel format:
93 */
94 static short hpcr_rgbTbl[3][256] = {
95 {
96 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
97 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
98 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
99 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
100 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
101 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
102 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
103 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
104 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
105 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
106 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
107 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
108 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
109 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
110 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
111 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
112 },
113 {
114 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
115 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
116 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
117 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
118 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
119 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
120 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
121 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
122 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
123 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
124 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
125 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
126 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
127 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
128 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
129 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
130 },
131 {
132 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
133 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
134 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
135 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
136 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
137 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
138 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
139 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
140 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
141 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
142 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
143 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
144 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
145 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
146 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
147 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
148 }
149 };
150
151
152
153 /**********************************************************************/
154 /***** X Utility Functions *****/
155 /**********************************************************************/
156
157
158 /**
159 * Return the host's byte order as LSBFirst or MSBFirst ala X.
160 */
161 #ifndef XFree86Server
162 static int host_byte_order( void )
163 {
164 int i = 1;
165 char *cptr = (char *) &i;
166 return (*cptr==1) ? LSBFirst : MSBFirst;
167 }
168 #endif
169
170
171 /**
172 * Check if the X Shared Memory extension is available.
173 * Return: 0 = not available
174 * 1 = shared XImage support available
175 * 2 = shared Pixmap support available also
176 */
177 static int check_for_xshm( XMesaDisplay *display )
178 {
179 #if defined(USE_XSHM) && !defined(XFree86Server)
180 int major, minor, ignore;
181 Bool pixmaps;
182
183 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
184 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) {
185 return (pixmaps==True) ? 2 : 1;
186 }
187 else {
188 return 0;
189 }
190 }
191 else {
192 return 0;
193 }
194 #else
195 /* No XSHM support */
196 return 0;
197 #endif
198 }
199
200
201 /**
202 * Apply gamma correction to an intensity value in [0..max]. Return the
203 * new intensity value.
204 */
205 static GLint
206 gamma_adjust( GLfloat gamma, GLint value, GLint max )
207 {
208 if (gamma == 1.0) {
209 return value;
210 }
211 else {
212 double x = (double) value / (double) max;
213 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma));
214 }
215 }
216
217
218
219 /**
220 * Return the true number of bits per pixel for XImages.
221 * For example, if we request a 24-bit deep visual we may actually need/get
222 * 32bpp XImages. This function returns the appropriate bpp.
223 * Input: dpy - the X display
224 * visinfo - desribes the visual to be used for XImages
225 * Return: true number of bits per pixel for XImages
226 */
227 static int
228 bits_per_pixel( XMesaVisual xmv )
229 {
230 #ifdef XFree86Server
231 const int depth = xmv->nplanes;
232 int i;
233 assert(depth > 0);
234 for (i = 0; i < screenInfo.numPixmapFormats; i++) {
235 if (screenInfo.formats[i].depth == depth)
236 return screenInfo.formats[i].bitsPerPixel;
237 }
238 return depth; /* should never get here, but this should be safe */
239 #else
240 XMesaDisplay *dpy = xmv->display;
241 XMesaVisualInfo visinfo = xmv->visinfo;
242 XMesaImage *img;
243 int bitsPerPixel;
244 /* Create a temporary XImage */
245 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
246 ZPixmap, 0, /*format, offset*/
247 (char*) MALLOC(8), /*data*/
248 1, 1, /*width, height*/
249 32, /*bitmap_pad*/
250 0 /*bytes_per_line*/
251 );
252 assert(img);
253 /* grab the bits/pixel value */
254 bitsPerPixel = img->bits_per_pixel;
255 /* free the XImage */
256 _mesa_free( img->data );
257 img->data = NULL;
258 XMesaDestroyImage( img );
259 return bitsPerPixel;
260 #endif
261 }
262
263
264
265 /*
266 * Determine if a given X window ID is valid (window exists).
267 * Do this by calling XGetWindowAttributes() for the window and
268 * checking if we catch an X error.
269 * Input: dpy - the display
270 * win - the window to check for existance
271 * Return: GL_TRUE - window exists
272 * GL_FALSE - window doesn't exist
273 */
274 #ifndef XFree86Server
275 static GLboolean WindowExistsFlag;
276
277 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
278 {
279 (void) dpy;
280 if (xerr->error_code == BadWindow) {
281 WindowExistsFlag = GL_FALSE;
282 }
283 return 0;
284 }
285
286 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
287 {
288 XWindowAttributes wa;
289 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
290 WindowExistsFlag = GL_TRUE;
291 old_handler = XSetErrorHandler(window_exists_err_handler);
292 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
293 XSetErrorHandler(old_handler);
294 return WindowExistsFlag;
295 }
296
297 static Status
298 get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
299 {
300 Window root;
301 Status stat;
302 int xpos, ypos;
303 unsigned int w, h, bw, depth;
304 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
305 *width = w;
306 *height = h;
307 return stat;
308 }
309 #endif
310
311
312 /**
313 * Return the size of the window (or pixmap) that corresponds to the
314 * given XMesaBuffer.
315 * \param width returns width in pixels
316 * \param height returns height in pixels
317 */
318 void
319 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
320 GLuint *width, GLuint *height)
321 {
322 #ifdef XFree86Server
323 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH);
324 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT);
325 #else
326 Status stat;
327
328 _glthread_LOCK_MUTEX(_xmesa_lock);
329 XSync(b->xm_visual->display, 0); /* added for Chromium */
330 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
331 _glthread_UNLOCK_MUTEX(_xmesa_lock);
332
333 if (!stat) {
334 /* probably querying a window that's recently been destroyed */
335 _mesa_warning(NULL, "XGetGeometry failed!\n");
336 *width = *height = 1;
337 }
338 #endif
339 }
340
341
342
343 /**********************************************************************/
344 /***** Linked list of XMesaBuffers *****/
345 /**********************************************************************/
346
347 XMesaBuffer XMesaBufferList = NULL;
348
349
350 /**
351 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
352 * Note that XMesaBuffer is derived from GLframebuffer.
353 * The new XMesaBuffer will not have any size (Width=Height=0).
354 *
355 * \param d the corresponding X drawable (window or pixmap)
356 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
357 * \param vis the buffer's visual
358 * \param cmap the window's colormap, if known.
359 * \return new XMesaBuffer or NULL if any problem
360 */
361 static XMesaBuffer
362 create_xmesa_buffer(XMesaDrawable d, BufferType type,
363 XMesaVisual vis, XMesaColormap cmap)
364 {
365 XMesaBuffer b;
366
367 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
368
369 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
370 if (!b)
371 return NULL;
372
373 b->display = vis->display;
374 b->xm_visual = vis;
375 b->type = type;
376 b->cmap = cmap;
377
378 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
379 b->mesa_buffer.Delete = xmesa_delete_framebuffer;
380
381 /*
382 * Front renderbuffer
383 */
384 b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE);
385 if (!b->frontxrb) {
386 _mesa_free(b);
387 return NULL;
388 }
389 b->frontxrb->Parent = b;
390 b->frontxrb->drawable = d;
391 b->frontxrb->pixmap = (XMesaPixmap) d;
392 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
393 &b->frontxrb->Base);
394
395 /*
396 * Back renderbuffer
397 */
398 if (vis->mesa_visual.doubleBufferMode) {
399 b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE);
400 if (!b->backxrb) {
401 /* XXX free front xrb too */
402 _mesa_free(b);
403 return NULL;
404 }
405 b->backxrb->Parent = b;
406 /* determine back buffer implementation */
407 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
408
409 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
410 &b->backxrb->Base);
411 }
412
413 /*
414 * Software alpha planes
415 */
416 if (vis->mesa_visual.alphaBits > 0
417 && vis->undithered_pf != PF_8A8B8G8R
418 && vis->undithered_pf != PF_8A8R8G8B) {
419 /* Visual has alpha, but pixel format doesn't support it.
420 * We'll use an alpha renderbuffer wrapper.
421 */
422 b->swAlpha = GL_TRUE;
423 }
424 else {
425 b->swAlpha = GL_FALSE;
426 }
427
428 /*
429 * Other renderbuffer (depth, stencil, etc)
430 */
431 _mesa_add_soft_renderbuffers(&b->mesa_buffer,
432 GL_FALSE, /* color */
433 vis->mesa_visual.haveDepthBuffer,
434 vis->mesa_visual.haveStencilBuffer,
435 vis->mesa_visual.haveAccumBuffer,
436 b->swAlpha,
437 vis->mesa_visual.numAuxBuffers > 0 );
438
439 /* GLX_EXT_texture_from_pixmap */
440 b->TextureTarget = 0;
441 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
442 b->TextureMipmap = 0;
443
444 /* insert buffer into linked list */
445 b->Next = XMesaBufferList;
446 XMesaBufferList = b;
447
448 return b;
449 }
450
451
452 /**
453 * Find an XMesaBuffer by matching X display and colormap but NOT matching
454 * the notThis buffer.
455 */
456 XMesaBuffer
457 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
458 {
459 XMesaBuffer b;
460 for (b=XMesaBufferList; b; b=b->Next) {
461 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
462 return b;
463 }
464 }
465 return NULL;
466 }
467
468
469 /**
470 * Remove buffer from linked list, delete if no longer referenced.
471 */
472 static void
473 xmesa_free_buffer(XMesaBuffer buffer)
474 {
475 XMesaBuffer prev = NULL, b;
476
477 for (b = XMesaBufferList; b; b = b->Next) {
478 if (b == buffer) {
479 struct gl_framebuffer *fb = &buffer->mesa_buffer;
480
481 /* unlink buffer from list */
482 if (prev)
483 prev->Next = buffer->Next;
484 else
485 XMesaBufferList = buffer->Next;
486
487 /* mark as delete pending */
488 fb->DeletePending = GL_TRUE;
489
490 /* Since the X window for the XMesaBuffer is going away, we don't
491 * want to dereference this pointer in the future.
492 */
493 b->frontxrb->drawable = 0;
494
495 /* Unreference. If count = zero we'll really delete the buffer */
496 _mesa_reference_framebuffer(&fb, NULL);
497
498 return;
499 }
500 /* continue search */
501 prev = b;
502 }
503 /* buffer not found in XMesaBufferList */
504 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
505 }
506
507
508 /**
509 * Copy X color table stuff from one XMesaBuffer to another.
510 */
511 static void
512 copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
513 {
514 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table));
515 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r));
516 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g));
517 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b));
518 dst->num_alloced = src->num_alloced;
519 MEMCPY(dst->alloced_colors, src->alloced_colors,
520 sizeof(src->alloced_colors));
521 }
522
523
524
525 /**********************************************************************/
526 /***** Misc Private Functions *****/
527 /**********************************************************************/
528
529
530 /**
531 * A replacement for XAllocColor. This function should never
532 * fail to allocate a color. When XAllocColor fails, we return
533 * the nearest matching color. If we have to allocate many colors
534 * this function isn't too efficient; the XQueryColors() could be
535 * done just once.
536 * Written by Michael Pichler, Brian Paul, Mark Kilgard
537 * Input: dpy - X display
538 * cmap - X colormap
539 * cmapSize - size of colormap
540 * In/Out: color - the XColor struct
541 * Output: exact - 1=exact color match, 0=closest match
542 * alloced - 1=XAlloc worked, 0=XAlloc failed
543 */
544 static void
545 noFaultXAllocColor( int client,
546 XMesaDisplay *dpy,
547 XMesaColormap cmap,
548 int cmapSize,
549 XMesaColor *color,
550 int *exact, int *alloced )
551 {
552 #ifdef XFree86Server
553 Pixel *ppixIn;
554 xrgb *ctable;
555 #else
556 /* we'll try to cache ctable for better remote display performance */
557 static Display *prevDisplay = NULL;
558 static XMesaColormap prevCmap = 0;
559 static int prevCmapSize = 0;
560 static XMesaColor *ctable = NULL;
561 #endif
562 XMesaColor subColor;
563 int i, bestmatch;
564 double mindist; /* 3*2^16^2 exceeds long int precision. */
565
566 (void) client;
567
568 /* First try just using XAllocColor. */
569 #ifdef XFree86Server
570 if (AllocColor(cmap,
571 &color->red, &color->green, &color->blue,
572 &color->pixel,
573 client) == Success)
574 #else
575 if (XAllocColor(dpy, cmap, color))
576 #endif
577 {
578 *exact = 1;
579 *alloced = 1;
580 return;
581 }
582
583 /* Alloc failed, search for closest match */
584
585 /* Retrieve color table entries. */
586 /* XXX alloca candidate. */
587 #ifdef XFree86Server
588 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel));
589 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb));
590 for (i = 0; i < cmapSize; i++) {
591 ppixIn[i] = i;
592 }
593 QueryColors(cmap, cmapSize, ppixIn, ctable);
594 #else
595 if (prevDisplay != dpy || prevCmap != cmap
596 || prevCmapSize != cmapSize || !ctable) {
597 /* free previously cached color table */
598 if (ctable)
599 _mesa_free(ctable);
600 /* Get the color table from X */
601 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor));
602 assert(ctable);
603 for (i = 0; i < cmapSize; i++) {
604 ctable[i].pixel = i;
605 }
606 XQueryColors(dpy, cmap, ctable, cmapSize);
607 prevDisplay = dpy;
608 prevCmap = cmap;
609 prevCmapSize = cmapSize;
610 }
611 #endif
612
613 /* Find best match. */
614 bestmatch = -1;
615 mindist = 0.0;
616 for (i = 0; i < cmapSize; i++) {
617 double dr = 0.30 * ((double) color->red - (double) ctable[i].red);
618 double dg = 0.59 * ((double) color->green - (double) ctable[i].green);
619 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue);
620 double dist = dr * dr + dg * dg + db * db;
621 if (bestmatch < 0 || dist < mindist) {
622 bestmatch = i;
623 mindist = dist;
624 }
625 }
626
627 /* Return result. */
628 subColor.red = ctable[bestmatch].red;
629 subColor.green = ctable[bestmatch].green;
630 subColor.blue = ctable[bestmatch].blue;
631 /* Try to allocate the closest match color. This should only
632 * fail if the cell is read/write. Otherwise, we're incrementing
633 * the cell's reference count.
634 */
635 #ifdef XFree86Server
636 if (AllocColor(cmap,
637 &subColor.red, &subColor.green, &subColor.blue,
638 &subColor.pixel,
639 client) == Success) {
640 #else
641 if (XAllocColor(dpy, cmap, &subColor)) {
642 #endif
643 *alloced = 1;
644 }
645 else {
646 /* do this to work around a problem reported by Frank Ortega */
647 subColor.pixel = (unsigned long) bestmatch;
648 subColor.red = ctable[bestmatch].red;
649 subColor.green = ctable[bestmatch].green;
650 subColor.blue = ctable[bestmatch].blue;
651 subColor.flags = DoRed | DoGreen | DoBlue;
652 *alloced = 0;
653 }
654 #ifdef XFree86Server
655 _mesa_free(ppixIn);
656 _mesa_free(ctable);
657 #else
658 /* don't free table, save it for next time */
659 #endif
660
661 *color = subColor;
662 *exact = 0;
663 }
664
665
666
667 /**
668 * Do setup for PF_GRAYSCALE pixel format.
669 * Note that buffer may be NULL.
670 */
671 static GLboolean
672 setup_grayscale(int client, XMesaVisual v,
673 XMesaBuffer buffer, XMesaColormap cmap)
674 {
675 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
676 return GL_FALSE;
677 }
678
679 if (buffer) {
680 XMesaBuffer prevBuffer;
681
682 if (!cmap) {
683 return GL_FALSE;
684 }
685
686 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
687 if (prevBuffer &&
688 (buffer->xm_visual->mesa_visual.rgbMode ==
689 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
690 /* Copy colormap stuff from previous XMesaBuffer which uses same
691 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
692 */
693 copy_colortable_info(buffer, prevBuffer);
694 }
695 else {
696 /* Allocate 256 shades of gray */
697 int gray;
698 int colorsfailed = 0;
699 for (gray=0;gray<256;gray++) {
700 GLint r = gamma_adjust( v->RedGamma, gray, 255 );
701 GLint g = gamma_adjust( v->GreenGamma, gray, 255 );
702 GLint b = gamma_adjust( v->BlueGamma, gray, 255 );
703 int exact, alloced;
704 XMesaColor xcol;
705 xcol.red = (r << 8) | r;
706 xcol.green = (g << 8) | g;
707 xcol.blue = (b << 8) | b;
708 noFaultXAllocColor( client, v->display,
709 cmap, GET_COLORMAP_SIZE(v),
710 &xcol, &exact, &alloced );
711 if (!exact) {
712 colorsfailed++;
713 }
714 if (alloced) {
715 assert(buffer->num_alloced<256);
716 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
717 buffer->num_alloced++;
718 }
719
720 /*OLD
721 assert(gray < 576);
722 buffer->color_table[gray*3+0] = xcol.pixel;
723 buffer->color_table[gray*3+1] = xcol.pixel;
724 buffer->color_table[gray*3+2] = xcol.pixel;
725 assert(xcol.pixel < 65536);
726 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
727 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
728 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
729 */
730 buffer->color_table[gray] = xcol.pixel;
731 assert(xcol.pixel < 65536);
732 buffer->pixel_to_r[xcol.pixel] = gray;
733 buffer->pixel_to_g[xcol.pixel] = gray;
734 buffer->pixel_to_b[xcol.pixel] = gray;
735 }
736
737 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
738 _mesa_warning(NULL,
739 "Note: %d out of 256 needed colors do not match exactly.\n",
740 colorsfailed );
741 }
742 }
743 }
744
745 v->dithered_pf = PF_Grayscale;
746 v->undithered_pf = PF_Grayscale;
747 return GL_TRUE;
748 }
749
750
751
752 /**
753 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
754 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
755 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
756 * color. While this function was originally designed just for 8-bit
757 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
758 * Dithering code contributed by Bob Mercier.
759 */
760 static GLboolean
761 setup_dithered_color(int client, XMesaVisual v,
762 XMesaBuffer buffer, XMesaColormap cmap)
763 {
764 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
765 return GL_FALSE;
766 }
767
768 if (buffer) {
769 XMesaBuffer prevBuffer;
770
771 if (!cmap) {
772 return GL_FALSE;
773 }
774
775 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
776 if (prevBuffer &&
777 (buffer->xm_visual->mesa_visual.rgbMode ==
778 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
779 /* Copy colormap stuff from previous, matching XMesaBuffer.
780 * Do this to avoid time spent in noFaultXAllocColor.
781 */
782 copy_colortable_info(buffer, prevBuffer);
783 }
784 else {
785 /* Allocate X colors and initialize color_table[], red_table[], etc */
786 int r, g, b, i;
787 int colorsfailed = 0;
788 for (r = 0; r < DITH_R; r++) {
789 for (g = 0; g < DITH_G; g++) {
790 for (b = 0; b < DITH_B; b++) {
791 XMesaColor xcol;
792 int exact, alloced;
793 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535);
794 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535);
795 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535);
796 noFaultXAllocColor( client, v->display,
797 cmap, GET_COLORMAP_SIZE(v),
798 &xcol, &exact, &alloced );
799 if (!exact) {
800 colorsfailed++;
801 }
802 if (alloced) {
803 assert(buffer->num_alloced<256);
804 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
805 buffer->num_alloced++;
806 }
807 i = DITH_MIX( r, g, b );
808 assert(i < 576);
809 buffer->color_table[i] = xcol.pixel;
810 assert(xcol.pixel < 65536);
811 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1);
812 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1);
813 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1);
814 }
815 }
816 }
817
818 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
819 _mesa_warning(NULL,
820 "Note: %d out of %d needed colors do not match exactly.\n",
821 colorsfailed, DITH_R * DITH_G * DITH_B );
822 }
823 }
824 }
825
826 v->dithered_pf = PF_Dither;
827 v->undithered_pf = PF_Lookup;
828 return GL_TRUE;
829 }
830
831
832 /**
833 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
834 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
835 * Special dithering tables have to be initialized.
836 */
837 static void
838 setup_8bit_hpcr(XMesaVisual v)
839 {
840 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
841 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
842 * on the root window AND the colormap obtainable by XGetRGBColormaps
843 * for that atom must be set on the window. (see also tkInitWindow)
844 * If that colormap is not set, the output will look stripy.
845 */
846
847 /* Setup color tables with gamma correction */
848 int i;
849 double g;
850
851 g = 1.0 / v->RedGamma;
852 for (i=0; i<256; i++) {
853 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g ));
854 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 );
855 }
856
857 g = 1.0 / v->GreenGamma;
858 for (i=0; i<256; i++) {
859 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g ));
860 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 );
861 }
862
863 g = 1.0 / v->BlueGamma;
864 for (i=0; i<256; i++) {
865 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g ));
866 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 );
867 }
868 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */
869 v->dithered_pf = PF_HPCR;
870
871 /* which method should I use to clear */
872 /* GL_FALSE: keep the ordinary method */
873 /* GL_TRUE : clear with dither pattern */
874 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE;
875
876 if (v->hpcr_clear_flag) {
877 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display,
878 DefaultRootWindow(v->display),
879 16, 2, 8);
880 #ifndef XFree86Server
881 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap,
882 0, 0, 16, 2, AllPlanes, ZPixmap);
883 #endif
884 }
885 }
886
887
888 /**
889 * Setup RGB rendering for a window with a True/DirectColor visual.
890 */
891 static void
892 setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
893 {
894 unsigned long rmask, gmask, bmask;
895 (void) buffer;
896 (void) cmap;
897
898 /* Compute red multiplier (mask) and bit shift */
899 v->rshift = 0;
900 rmask = GET_REDMASK(v);
901 while ((rmask & 1)==0) {
902 v->rshift++;
903 rmask = rmask >> 1;
904 }
905
906 /* Compute green multiplier (mask) and bit shift */
907 v->gshift = 0;
908 gmask = GET_GREENMASK(v);
909 while ((gmask & 1)==0) {
910 v->gshift++;
911 gmask = gmask >> 1;
912 }
913
914 /* Compute blue multiplier (mask) and bit shift */
915 v->bshift = 0;
916 bmask = GET_BLUEMASK(v);
917 while ((bmask & 1)==0) {
918 v->bshift++;
919 bmask = bmask >> 1;
920 }
921
922 /*
923 * Compute component-to-pixel lookup tables and dithering kernel
924 */
925 {
926 static GLubyte kernel[16] = {
927 0*16, 8*16, 2*16, 10*16,
928 12*16, 4*16, 14*16, 6*16,
929 3*16, 11*16, 1*16, 9*16,
930 15*16, 7*16, 13*16, 5*16,
931 };
932 GLint rBits = _mesa_bitcount(rmask);
933 GLint gBits = _mesa_bitcount(gmask);
934 GLint bBits = _mesa_bitcount(bmask);
935 GLint maxBits;
936 GLuint i;
937
938 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
939 for (i=0; i<=rmask; i++)
940 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
941 for (i=0; i<=gmask; i++)
942 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
943 for (i=0; i<=bmask; i++)
944 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
945
946 /* convert RGB values from [0,255] to pixel components */
947
948 for (i=0;i<256;i++) {
949 GLint r = gamma_adjust(v->RedGamma, i, 255);
950 GLint g = gamma_adjust(v->GreenGamma, i, 255);
951 GLint b = gamma_adjust(v->BlueGamma, i, 255);
952 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
953 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
954 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
955 }
956 /* overflow protection */
957 for (i=256;i<512;i++) {
958 v->RtoPixel[i] = v->RtoPixel[255];
959 v->GtoPixel[i] = v->GtoPixel[255];
960 v->BtoPixel[i] = v->BtoPixel[255];
961 }
962
963 /* setup dithering kernel */
964 maxBits = rBits;
965 if (gBits > maxBits) maxBits = gBits;
966 if (bBits > maxBits) maxBits = bBits;
967 for (i=0;i<16;i++) {
968 v->Kernel[i] = kernel[i] >> maxBits;
969 }
970
971 v->undithered_pf = PF_Truecolor;
972 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
973 }
974
975 /*
976 * Now check for TrueColor visuals which we can optimize.
977 */
978 if ( GET_REDMASK(v) ==0x0000ff
979 && GET_GREENMASK(v)==0x00ff00
980 && GET_BLUEMASK(v) ==0xff0000
981 && CHECK_BYTE_ORDER(v)
982 && v->BitsPerPixel==32
983 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
984 /* common 32 bpp config used on SGI, Sun */
985 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
986 }
987 else if (GET_REDMASK(v) == 0xff0000
988 && GET_GREENMASK(v)== 0x00ff00
989 && GET_BLUEMASK(v) == 0x0000ff
990 && CHECK_BYTE_ORDER(v)
991 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
992 if (v->BitsPerPixel==32) {
993 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
994 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
995 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
996 else
997 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
998 }
999 else if (v->BitsPerPixel == 24) {
1000 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
1001 }
1002 }
1003 else if (GET_REDMASK(v) ==0xf800
1004 && GET_GREENMASK(v)==0x07e0
1005 && GET_BLUEMASK(v) ==0x001f
1006 && CHECK_BYTE_ORDER(v)
1007 && v->BitsPerPixel==16
1008 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1009 /* 5-6-5 RGB */
1010 v->undithered_pf = PF_5R6G5B;
1011 v->dithered_pf = PF_Dither_5R6G5B;
1012 }
1013 else if (GET_REDMASK(v) ==0xe0
1014 && GET_GREENMASK(v)==0x1c
1015 && GET_BLUEMASK(v) ==0x03
1016 && CHECK_FOR_HPCR(v)) {
1017 /* 8-bit HP color recovery */
1018 setup_8bit_hpcr( v );
1019 }
1020 }
1021
1022
1023
1024 /**
1025 * Setup RGB rendering for a window with a monochrome visual.
1026 */
1027 static void
1028 setup_monochrome( XMesaVisual v, XMesaBuffer b )
1029 {
1030 (void) b;
1031 v->dithered_pf = v->undithered_pf = PF_1Bit;
1032 /* if black=1 then we must flip pixel values */
1033 v->bitFlip = (GET_BLACK_PIXEL(v) != 0);
1034 }
1035
1036
1037
1038 /**
1039 * When a context is bound for the first time, we can finally finish
1040 * initializing the context's visual and buffer information.
1041 * \param v the XMesaVisual to initialize
1042 * \param b the XMesaBuffer to initialize (may be NULL)
1043 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1044 * \param window the window/pixmap we're rendering into
1045 * \param cmap the colormap associated with the window/pixmap
1046 * \return GL_TRUE=success, GL_FALSE=failure
1047 */
1048 static GLboolean
1049 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
1050 GLboolean rgb_flag, XMesaDrawable window,
1051 XMesaColormap cmap)
1052 {
1053 int client = 0;
1054
1055 #ifdef XFree86Server
1056 client = (window) ? CLIENT_ID(window->id) : 0;
1057 #endif
1058
1059 ASSERT(!b || b->xm_visual == v);
1060
1061 /* Save true bits/pixel */
1062 v->BitsPerPixel = bits_per_pixel(v);
1063 assert(v->BitsPerPixel > 0);
1064
1065 if (rgb_flag == GL_FALSE) {
1066 /* COLOR-INDEXED WINDOW:
1067 * Even if the visual is TrueColor or DirectColor we treat it as
1068 * being color indexed. This is weird but might be useful to someone.
1069 */
1070 v->dithered_pf = v->undithered_pf = PF_Index;
1071 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v);
1072 }
1073 else {
1074 /* RGB WINDOW:
1075 * We support RGB rendering into almost any kind of visual.
1076 */
1077 const int xclass = v->mesa_visual.visualType;
1078 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1079 setup_truecolor( v, b, cmap );
1080 }
1081 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) {
1082 setup_monochrome( v, b );
1083 }
1084 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) {
1085 if (!setup_grayscale( client, v, b, cmap )) {
1086 return GL_FALSE;
1087 }
1088 }
1089 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR)
1090 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) {
1091 if (!setup_dithered_color( client, v, b, cmap )) {
1092 return GL_FALSE;
1093 }
1094 }
1095 else {
1096 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
1097 return GL_FALSE;
1098 }
1099 v->mesa_visual.indexBits = 0;
1100
1101 if (_mesa_getenv("MESA_NO_DITHER")) {
1102 v->dithered_pf = v->undithered_pf;
1103 }
1104 }
1105
1106
1107 /*
1108 * If MESA_INFO env var is set print out some debugging info
1109 * which can help Brian figure out what's going on when a user
1110 * reports bugs.
1111 */
1112 if (_mesa_getenv("MESA_INFO")) {
1113 _mesa_printf("X/Mesa visual = %p\n", (void *) v);
1114 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
1115 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
1116 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level);
1117 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
1118 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
1119 }
1120
1121 if (b && window) {
1122 char *data;
1123
1124 /* Do window-specific initializations */
1125
1126 /* these should have been set in create_xmesa_buffer */
1127 ASSERT(b->frontxrb->drawable == window);
1128 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
1129
1130 /* Setup for single/double buffering */
1131 if (v->mesa_visual.doubleBufferMode) {
1132 /* Double buffered */
1133 b->shm = check_for_xshm( v->display );
1134 }
1135
1136 /* X11 graphics contexts */
1137 #ifdef XFree86Server
1138 b->gc = CreateScratchGC(v->display, window->depth);
1139 #else
1140 b->gc = XCreateGC( v->display, window, 0, NULL );
1141 #endif
1142 XMesaSetFunction( v->display, b->gc, GXcopy );
1143
1144 /* cleargc - for glClear() */
1145 #ifdef XFree86Server
1146 b->cleargc = CreateScratchGC(v->display, window->depth);
1147 #else
1148 b->cleargc = XCreateGC( v->display, window, 0, NULL );
1149 #endif
1150 XMesaSetFunction( v->display, b->cleargc, GXcopy );
1151
1152 /*
1153 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1154 * Patch contributed by Michael Pichler May 15, 1995.
1155 */
1156 #ifdef XFree86Server
1157 b->swapgc = CreateScratchGC(v->display, window->depth);
1158 {
1159 CARD32 v[1];
1160 v[0] = FALSE;
1161 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL);
1162 }
1163 #else
1164 {
1165 XGCValues gcvalues;
1166 gcvalues.graphics_exposures = False;
1167 b->swapgc = XCreateGC(v->display, window,
1168 GCGraphicsExposures, &gcvalues);
1169 }
1170 #endif
1171 XMesaSetFunction( v->display, b->swapgc, GXcopy );
1172 /*
1173 * Set fill style and tile pixmap once for all for HPCR stuff
1174 * (instead of doing it each time in clear_color_HPCR_pixmap())
1175 * Initialize whole stuff
1176 * Patch contributed by Jacques Leroy March 8, 1998.
1177 */
1178 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) {
1179 int i;
1180 for (i = 0; i < 16; i++) {
1181 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0);
1182 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0);
1183 }
1184 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap,
1185 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2);
1186 XMesaSetFillStyle( v->display, b->cleargc, FillTiled);
1187 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap );
1188 }
1189
1190 /* Initialize the row buffer XImage for use in write_color_span() */
1191 data = (char*) MALLOC(MAX_WIDTH*4);
1192 #ifdef XFree86Server
1193 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data);
1194 #else
1195 b->rowimage = XCreateImage( v->display,
1196 v->visinfo->visual,
1197 v->visinfo->depth,
1198 ZPixmap, 0, /*format, offset*/
1199 data, /*data*/
1200 MAX_WIDTH, 1, /*width, height*/
1201 32, /*bitmap_pad*/
1202 0 /*bytes_per_line*/ );
1203 #endif
1204 if (!b->rowimage)
1205 return GL_FALSE;
1206 }
1207
1208 return GL_TRUE;
1209 }
1210
1211
1212
1213 /*
1214 * Convert an RGBA color to a pixel value.
1215 */
1216 unsigned long
1217 xmesa_color_to_pixel(GLcontext *ctx,
1218 GLubyte r, GLubyte g, GLubyte b, GLubyte a,
1219 GLuint pixelFormat)
1220 {
1221 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1222 switch (pixelFormat) {
1223 case PF_Index:
1224 return 0;
1225 case PF_Truecolor:
1226 {
1227 unsigned long p;
1228 PACK_TRUECOLOR( p, r, g, b );
1229 return p;
1230 }
1231 case PF_8A8B8G8R:
1232 return PACK_8A8B8G8R( r, g, b, a );
1233 case PF_8A8R8G8B:
1234 return PACK_8A8R8G8B( r, g, b, a );
1235 case PF_8R8G8B:
1236 /* fall through */
1237 case PF_8R8G8B24:
1238 return PACK_8R8G8B( r, g, b );
1239 case PF_5R6G5B:
1240 return PACK_5R6G5B( r, g, b );
1241 case PF_Dither:
1242 {
1243 DITHER_SETUP;
1244 return DITHER( 1, 0, r, g, b );
1245 }
1246 case PF_1Bit:
1247 /* 382 = (3*255)/2 */
1248 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
1249 case PF_HPCR:
1250 return DITHER_HPCR(1, 1, r, g, b);
1251 case PF_Lookup:
1252 {
1253 LOOKUP_SETUP;
1254 return LOOKUP( r, g, b );
1255 }
1256 case PF_Grayscale:
1257 return GRAY_RGB( r, g, b );
1258 case PF_Dither_True:
1259 /* fall through */
1260 case PF_Dither_5R6G5B:
1261 {
1262 unsigned long p;
1263 PACK_TRUEDITHER(p, 1, 0, r, g, b);
1264 return p;
1265 }
1266 default:
1267 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
1268 }
1269 return 0;
1270 }
1271
1272
1273 #define NUM_VISUAL_TYPES 6
1274
1275 /**
1276 * Convert an X visual type to a GLX visual type.
1277 *
1278 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1279 * to be converted.
1280 * \return If \c visualType is a valid X visual type, a GLX visual type will
1281 * be returned. Otherwise \c GLX_NONE will be returned.
1282 *
1283 * \note
1284 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1285 * DRI CVS tree.
1286 */
1287 static GLint
1288 xmesa_convert_from_x_visual_type( int visualType )
1289 {
1290 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
1291 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
1292 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
1293 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
1294 };
1295
1296 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
1297 ? glx_visual_types[ visualType ] : GLX_NONE;
1298 }
1299
1300
1301 /**********************************************************************/
1302 /***** Public Functions *****/
1303 /**********************************************************************/
1304
1305
1306 #ifdef IN_DRI_DRIVER
1307 #define need_GL_VERSION_1_3
1308 #define need_GL_VERSION_1_4
1309 #define need_GL_VERSION_1_5
1310 #define need_GL_VERSION_2_0
1311
1312 /* sw extensions for imaging */
1313 #define need_GL_EXT_blend_color
1314 #define need_GL_EXT_blend_minmax
1315 #define need_GL_EXT_convolution
1316 #define need_GL_EXT_histogram
1317 #define need_GL_SGI_color_table
1318
1319 /* sw extensions not associated with some GL version */
1320 #define need_GL_ARB_draw_elements_base_vertex
1321 #define need_GL_ARB_shader_objects
1322 #define need_GL_ARB_sync
1323 #define need_GL_ARB_vertex_program
1324 #define need_GL_APPLE_vertex_array_object
1325 #define need_GL_ATI_fragment_shader
1326 #define need_GL_EXT_depth_bounds_test
1327 #define need_GL_EXT_framebuffer_object
1328 #define need_GL_EXT_framebuffer_blit
1329 #define need_GL_EXT_gpu_program_parameters
1330 #define need_GL_EXT_paletted_texture
1331 #define need_GL_MESA_resize_buffers
1332 #define need_GL_NV_vertex_program
1333 #define need_GL_NV_fragment_program
1334
1335 #include "extension_helper.h"
1336 #include "utils.h"
1337
1338 const struct dri_extension card_extensions[] =
1339 {
1340 { "GL_VERSION_1_3", GL_VERSION_1_3_functions },
1341 { "GL_VERSION_1_4", GL_VERSION_1_4_functions },
1342 { "GL_VERSION_1_5", GL_VERSION_1_5_functions },
1343 { "GL_VERSION_2_0", GL_VERSION_2_0_functions },
1344
1345 { "GL_EXT_blend_color", GL_EXT_blend_color_functions },
1346 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions },
1347 { "GL_EXT_convolution", GL_EXT_convolution_functions },
1348 { "GL_EXT_histogram", GL_EXT_histogram_functions },
1349 { "GL_SGI_color_table", GL_SGI_color_table_functions },
1350
1351 { "GL_ARB_depth_clamp", NULL },
1352 { "GL_ARB_draw_elements_base_vertex", GL_ARB_draw_elements_base_vertex_functions },
1353 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
1354 { "GL_ARB_sync", GL_ARB_sync_functions },
1355 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
1356 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
1357 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
1358 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
1359 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
1360 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
1361 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
1362 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
1363 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
1364 { "GL_NV_depth_clamp", NULL },
1365 { "GL_NV_vertex_program", GL_NV_vertex_program_functions },
1366 { "GL_NV_fragment_program", GL_NV_fragment_program_functions },
1367 { NULL, NULL }
1368 };
1369 #endif
1370
1371 /*
1372 * Create a new X/Mesa visual.
1373 * Input: display - X11 display
1374 * visinfo - an XVisualInfo pointer
1375 * rgb_flag - GL_TRUE = RGB mode,
1376 * GL_FALSE = color index mode
1377 * alpha_flag - alpha buffer requested?
1378 * db_flag - GL_TRUE = double-buffered,
1379 * GL_FALSE = single buffered
1380 * stereo_flag - stereo visual?
1381 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1382 * GL_FALSE = use an off-screen pixmap for back buffer
1383 * depth_size - requested bits/depth values, or zero
1384 * stencil_size - requested bits/stencil values, or zero
1385 * accum_red_size - requested bits/red accum values, or zero
1386 * accum_green_size - requested bits/green accum values, or zero
1387 * accum_blue_size - requested bits/blue accum values, or zero
1388 * accum_alpha_size - requested bits/alpha accum values, or zero
1389 * num_samples - number of samples/pixel if multisampling, or zero
1390 * level - visual level, usually 0
1391 * visualCaveat - ala the GLX extension, usually GLX_NONE
1392 * Return; a new XMesaVisual or 0 if error.
1393 */
1394 PUBLIC
1395 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1396 XMesaVisualInfo visinfo,
1397 GLboolean rgb_flag,
1398 GLboolean alpha_flag,
1399 GLboolean db_flag,
1400 GLboolean stereo_flag,
1401 GLboolean ximage_flag,
1402 GLint depth_size,
1403 GLint stencil_size,
1404 GLint accum_red_size,
1405 GLint accum_green_size,
1406 GLint accum_blue_size,
1407 GLint accum_alpha_size,
1408 GLint num_samples,
1409 GLint level,
1410 GLint visualCaveat )
1411 {
1412 char *gamma;
1413 XMesaVisual v;
1414 GLint red_bits, green_bits, blue_bits, alpha_bits;
1415
1416 #ifdef IN_DRI_DRIVER
1417 /* driInitExtensions() should be called once per screen to setup extension
1418 * indices. There is no need to call it when the context is created since
1419 * XMesa enables mesa sw extensions on its own.
1420 */
1421 driInitExtensions( NULL, card_extensions, GL_FALSE );
1422 #endif
1423
1424 #ifndef XFree86Server
1425 /* For debugging only */
1426 if (_mesa_getenv("MESA_XSYNC")) {
1427 /* This makes debugging X easier.
1428 * In your debugger, set a breakpoint on _XError to stop when an
1429 * X protocol error is generated.
1430 */
1431 XSynchronize( display, 1 );
1432 }
1433 #endif
1434
1435 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1436 if (!v) {
1437 return NULL;
1438 }
1439
1440 v->display = display;
1441
1442 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1443 * the struct but we may need some of the information contained in it
1444 * at a later time.
1445 */
1446 #ifndef XFree86Server
1447 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1448 if(!v->visinfo) {
1449 _mesa_free(v);
1450 return NULL;
1451 }
1452 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1453 #endif
1454
1455 /* check for MESA_GAMMA environment variable */
1456 gamma = _mesa_getenv("MESA_GAMMA");
1457 if (gamma) {
1458 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1459 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1460 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1461 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1462 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1463 }
1464 else {
1465 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1466 }
1467
1468 v->ximage_flag = ximage_flag;
1469
1470 #ifdef XFree86Server
1471 /* We could calculate these values by ourselves. nplanes is either the sum
1472 * of the red, green, and blue bits or the number index bits.
1473 * ColormapEntries is either (1U << index_bits) or
1474 * (1U << max(redBits, greenBits, blueBits)).
1475 */
1476 assert(visinfo->nplanes > 0);
1477 v->nplanes = visinfo->nplanes;
1478 v->ColormapEntries = visinfo->ColormapEntries;
1479
1480 v->mesa_visual.redMask = visinfo->redMask;
1481 v->mesa_visual.greenMask = visinfo->greenMask;
1482 v->mesa_visual.blueMask = visinfo->blueMask;
1483 v->mesa_visual.visualID = visinfo->vid;
1484 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */
1485 #else
1486 v->mesa_visual.redMask = visinfo->red_mask;
1487 v->mesa_visual.greenMask = visinfo->green_mask;
1488 v->mesa_visual.blueMask = visinfo->blue_mask;
1489 v->mesa_visual.visualID = visinfo->visualid;
1490 v->mesa_visual.screen = visinfo->screen;
1491 #endif
1492
1493 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1494 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
1495 #else
1496 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
1497 #endif
1498
1499 v->mesa_visual.visualRating = visualCaveat;
1500
1501 if (alpha_flag)
1502 v->mesa_visual.alphaBits = 8;
1503
1504 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
1505
1506 {
1507 const int xclass = v->mesa_visual.visualType;
1508 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1509 red_bits = _mesa_bitcount(GET_REDMASK(v));
1510 green_bits = _mesa_bitcount(GET_GREENMASK(v));
1511 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
1512 }
1513 else {
1514 /* this is an approximation */
1515 int depth;
1516 depth = GET_VISUAL_DEPTH(v);
1517 red_bits = depth / 3;
1518 depth -= red_bits;
1519 green_bits = depth / 2;
1520 depth -= green_bits;
1521 blue_bits = depth;
1522 alpha_bits = 0;
1523 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1524 }
1525 alpha_bits = v->mesa_visual.alphaBits;
1526 }
1527
1528 _mesa_initialize_visual( &v->mesa_visual,
1529 rgb_flag, db_flag, stereo_flag,
1530 red_bits, green_bits,
1531 blue_bits, alpha_bits,
1532 v->mesa_visual.indexBits,
1533 depth_size,
1534 stencil_size,
1535 accum_red_size, accum_green_size,
1536 accum_blue_size, accum_alpha_size,
1537 0 );
1538
1539 /* XXX minor hack */
1540 v->mesa_visual.level = level;
1541 return v;
1542 }
1543
1544
1545 PUBLIC
1546 void XMesaDestroyVisual( XMesaVisual v )
1547 {
1548 #ifndef XFree86Server
1549 _mesa_free(v->visinfo);
1550 #endif
1551 _mesa_free(v);
1552 }
1553
1554
1555
1556 /**
1557 * Create a new XMesaContext.
1558 * \param v the XMesaVisual
1559 * \param share_list another XMesaContext with which to share display
1560 * lists or NULL if no sharing is wanted.
1561 * \return an XMesaContext or NULL if error.
1562 */
1563 PUBLIC
1564 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1565 {
1566 static GLboolean firstTime = GL_TRUE;
1567 XMesaContext c;
1568 GLcontext *mesaCtx;
1569 struct dd_function_table functions;
1570 TNLcontext *tnl;
1571
1572 if (firstTime) {
1573 _glthread_INIT_MUTEX(_xmesa_lock);
1574 firstTime = GL_FALSE;
1575 }
1576
1577 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1578 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1579 if (!c)
1580 return NULL;
1581
1582 mesaCtx = &(c->mesa);
1583
1584 /* initialize with default driver functions, then plug in XMesa funcs */
1585 _mesa_init_driver_functions(&functions);
1586 xmesa_init_driver_functions(v, &functions);
1587 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
1588 share_list ? &(share_list->mesa) : (GLcontext *) NULL,
1589 &functions, (void *) c)) {
1590 _mesa_free(c);
1591 return NULL;
1592 }
1593
1594 /* Enable this to exercise fixed function -> shader translation
1595 * with software rendering.
1596 */
1597 if (0) {
1598 mesaCtx->VertexProgram._MaintainTnlProgram = GL_TRUE;
1599 mesaCtx->FragmentProgram._MaintainTexEnvProgram = GL_TRUE;
1600 }
1601
1602 _mesa_enable_sw_extensions(mesaCtx);
1603 _mesa_enable_1_3_extensions(mesaCtx);
1604 _mesa_enable_1_4_extensions(mesaCtx);
1605 _mesa_enable_1_5_extensions(mesaCtx);
1606 _mesa_enable_2_0_extensions(mesaCtx);
1607 _mesa_enable_2_1_extensions(mesaCtx);
1608 #if ENABLE_EXT_texure_compression_s3tc
1609 if (mesaCtx->Mesa_DXTn) {
1610 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
1611 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
1612 }
1613 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
1614 #endif
1615 #if ENABLE_EXT_timer_query
1616 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
1617 #endif
1618
1619 #ifdef XFree86Server
1620 /* If we're running in the X server, do bounds checking to prevent
1621 * segfaults and server crashes!
1622 */
1623 mesaCtx->Const.CheckArrayBounds = GL_TRUE;
1624 #endif
1625
1626 /* finish up xmesa context initializations */
1627 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
1628 c->xm_visual = v;
1629 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1630 c->display = v->display;
1631 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1632
1633 /* Initialize the software rasterizer and helper modules.
1634 */
1635 if (!_swrast_CreateContext( mesaCtx ) ||
1636 !_vbo_CreateContext( mesaCtx ) ||
1637 !_tnl_CreateContext( mesaCtx ) ||
1638 !_swsetup_CreateContext( mesaCtx )) {
1639 _mesa_free_context_data(&c->mesa);
1640 _mesa_free(c);
1641 return NULL;
1642 }
1643
1644 /* tnl setup */
1645 tnl = TNL_CONTEXT(mesaCtx);
1646 tnl->Driver.RunPipeline = _tnl_run_pipeline;
1647 /* swrast setup */
1648 xmesa_register_swrast_functions( mesaCtx );
1649 _swsetup_Wakeup(mesaCtx);
1650
1651 if (TEST_META_FUNCS)
1652 _mesa_meta_init(mesaCtx);
1653
1654 return c;
1655 }
1656
1657
1658
1659 PUBLIC
1660 void XMesaDestroyContext( XMesaContext c )
1661 {
1662 GLcontext *mesaCtx = &c->mesa;
1663
1664 #ifdef FX
1665 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) );
1666 #endif
1667
1668 if (TEST_META_FUNCS)
1669 _mesa_meta_free( mesaCtx );
1670
1671 _swsetup_DestroyContext( mesaCtx );
1672 _swrast_DestroyContext( mesaCtx );
1673 _tnl_DestroyContext( mesaCtx );
1674 _vbo_DestroyContext( mesaCtx );
1675 _mesa_free_context_data( mesaCtx );
1676 _mesa_free( c );
1677 }
1678
1679
1680
1681 /**
1682 * Private function for creating an XMesaBuffer which corresponds to an
1683 * X window or pixmap.
1684 * \param v the window's XMesaVisual
1685 * \param w the window we're wrapping
1686 * \return new XMesaBuffer or NULL if error
1687 */
1688 PUBLIC XMesaBuffer
1689 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
1690 {
1691 #ifndef XFree86Server
1692 XWindowAttributes attr;
1693 #endif
1694 XMesaBuffer b;
1695 XMesaColormap cmap;
1696 int depth;
1697
1698 assert(v);
1699 assert(w);
1700
1701 /* Check that window depth matches visual depth */
1702 #ifdef XFree86Server
1703 depth = ((XMesaDrawable)w)->depth;
1704 #else
1705 XGetWindowAttributes( v->display, w, &attr );
1706 depth = attr.depth;
1707 #endif
1708 if (GET_VISUAL_DEPTH(v) != depth) {
1709 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1710 GET_VISUAL_DEPTH(v), depth);
1711 return NULL;
1712 }
1713
1714 /* Find colormap */
1715 #ifdef XFree86Server
1716 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1717 #else
1718 if (attr.colormap) {
1719 cmap = attr.colormap;
1720 }
1721 else {
1722 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1723 /* this is weird, a window w/out a colormap!? */
1724 /* OK, let's just allocate a new one and hope for the best */
1725 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1726 }
1727 #endif
1728
1729 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1730 if (!b)
1731 return NULL;
1732
1733 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1734 (XMesaDrawable) w, cmap )) {
1735 xmesa_free_buffer(b);
1736 return NULL;
1737 }
1738
1739 return b;
1740 }
1741
1742
1743
1744 /**
1745 * Create a new XMesaBuffer from an X pixmap.
1746 *
1747 * \param v the XMesaVisual
1748 * \param p the pixmap
1749 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1750 * \c GLX_DIRECT_COLOR visual for the pixmap
1751 * \returns new XMesaBuffer or NULL if error
1752 */
1753 PUBLIC XMesaBuffer
1754 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1755 {
1756 XMesaBuffer b;
1757
1758 assert(v);
1759
1760 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1761 if (!b)
1762 return NULL;
1763
1764 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1765 (XMesaDrawable) p, cmap)) {
1766 xmesa_free_buffer(b);
1767 return NULL;
1768 }
1769
1770 return b;
1771 }
1772
1773
1774 /**
1775 * For GLX_EXT_texture_from_pixmap
1776 */
1777 XMesaBuffer
1778 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1779 XMesaColormap cmap,
1780 int format, int target, int mipmap)
1781 {
1782 GET_CURRENT_CONTEXT(ctx);
1783 XMesaBuffer b;
1784 GLuint width, height;
1785
1786 assert(v);
1787
1788 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1789 if (!b)
1790 return NULL;
1791
1792 /* get pixmap size, update framebuffer/renderbuffer dims */
1793 xmesa_get_window_size(v->display, b, &width, &height);
1794 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1795
1796 if (target == 0) {
1797 /* examine dims */
1798 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1799 target = GLX_TEXTURE_2D_EXT;
1800 }
1801 else if ( _mesa_bitcount(width) == 1
1802 && _mesa_bitcount(height) == 1) {
1803 /* power of two size */
1804 if (height == 1) {
1805 target = GLX_TEXTURE_1D_EXT;
1806 }
1807 else {
1808 target = GLX_TEXTURE_2D_EXT;
1809 }
1810 }
1811 else if (ctx->Extensions.NV_texture_rectangle) {
1812 target = GLX_TEXTURE_RECTANGLE_EXT;
1813 }
1814 else {
1815 /* non power of two textures not supported */
1816 XMesaDestroyBuffer(b);
1817 return 0;
1818 }
1819 }
1820
1821 b->TextureTarget = target;
1822 b->TextureFormat = format;
1823 b->TextureMipmap = mipmap;
1824
1825 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1826 (XMesaDrawable) p, cmap)) {
1827 xmesa_free_buffer(b);
1828 return NULL;
1829 }
1830
1831 return b;
1832 }
1833
1834
1835
1836 XMesaBuffer
1837 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1838 unsigned int width, unsigned int height)
1839 {
1840 #ifndef XFree86Server
1841 XMesaWindow root;
1842 XMesaDrawable drawable; /* X Pixmap Drawable */
1843 XMesaBuffer b;
1844
1845 /* allocate pixmap for front buffer */
1846 root = RootWindow( v->display, v->visinfo->screen );
1847 drawable = XCreatePixmap(v->display, root, width, height,
1848 v->visinfo->depth);
1849 if (!drawable)
1850 return NULL;
1851
1852 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1853 if (!b)
1854 return NULL;
1855
1856 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1857 drawable, cmap)) {
1858 xmesa_free_buffer(b);
1859 return NULL;
1860 }
1861
1862 return b;
1863 #else
1864 return 0;
1865 #endif
1866 }
1867
1868
1869
1870 /*
1871 * Deallocate an XMesaBuffer structure and all related info.
1872 */
1873 PUBLIC void
1874 XMesaDestroyBuffer(XMesaBuffer b)
1875 {
1876 xmesa_free_buffer(b);
1877 }
1878
1879
1880 /**
1881 * Query the current window size and update the corresponding GLframebuffer
1882 * and all attached renderbuffers.
1883 * Called when:
1884 * 1. the first time a buffer is bound to a context.
1885 * 2. from glViewport to poll for window size changes
1886 * 3. from the XMesaResizeBuffers() API function.
1887 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1888 * when resizing a buffer when no rendering context is bound.
1889 */
1890 void
1891 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1892 {
1893 GLuint width, height;
1894 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1895 if (drawBuffer->mesa_buffer.Width != width ||
1896 drawBuffer->mesa_buffer.Height != height) {
1897 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
1898 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1899 }
1900 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1901 }
1902
1903
1904 /*
1905 * Bind buffer b to context c and make c the current rendering context.
1906 */
1907 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1908 {
1909 return XMesaMakeCurrent2( c, b, b );
1910 }
1911
1912
1913 /*
1914 * Bind buffer b to context c and make c the current rendering context.
1915 */
1916 PUBLIC
1917 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1918 XMesaBuffer readBuffer )
1919 {
1920 if (c) {
1921 if (!drawBuffer || !readBuffer)
1922 return GL_FALSE; /* must specify buffers! */
1923
1924 if (&(c->mesa) == _mesa_get_current_context()
1925 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1926 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1927 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1928 /* same context and buffer, do nothing */
1929 return GL_TRUE;
1930 }
1931
1932 c->xm_buffer = drawBuffer;
1933
1934 #ifdef FX
1935 if (FXmakeCurrent( drawBuffer ))
1936 return GL_TRUE;
1937 #endif
1938
1939 /* Call this periodically to detect when the user has begun using
1940 * GL rendering from multiple threads.
1941 */
1942 _glapi_check_multithread();
1943
1944 xmesa_check_and_update_buffer_size(c, drawBuffer);
1945 if (readBuffer != drawBuffer)
1946 xmesa_check_and_update_buffer_size(c, readBuffer);
1947
1948 _mesa_make_current(&(c->mesa),
1949 &drawBuffer->mesa_buffer,
1950 &readBuffer->mesa_buffer);
1951
1952 if (c->xm_visual->mesa_visual.rgbMode) {
1953 /*
1954 * Must recompute and set these pixel values because colormap
1955 * can be different for different windows.
1956 */
1957 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
1958 c->clearcolor[0],
1959 c->clearcolor[1],
1960 c->clearcolor[2],
1961 c->clearcolor[3],
1962 c->xm_visual->undithered_pf);
1963 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
1964 }
1965
1966 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1967 drawBuffer->wasCurrent = GL_TRUE;
1968 }
1969 else {
1970 /* Detach */
1971 _mesa_make_current( NULL, NULL, NULL );
1972 }
1973 return GL_TRUE;
1974 }
1975
1976
1977 /*
1978 * Unbind the context c from its buffer.
1979 */
1980 GLboolean XMesaUnbindContext( XMesaContext c )
1981 {
1982 /* A no-op for XFree86 integration purposes */
1983 return GL_TRUE;
1984 }
1985
1986
1987 XMesaContext XMesaGetCurrentContext( void )
1988 {
1989 GET_CURRENT_CONTEXT(ctx);
1990 if (ctx) {
1991 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1992 return xmesa;
1993 }
1994 else {
1995 return 0;
1996 }
1997 }
1998
1999
2000 XMesaBuffer XMesaGetCurrentBuffer( void )
2001 {
2002 GET_CURRENT_CONTEXT(ctx);
2003 if (ctx) {
2004 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
2005 return xmbuf;
2006 }
2007 else {
2008 return 0;
2009 }
2010 }
2011
2012
2013 /* New in Mesa 3.1 */
2014 XMesaBuffer XMesaGetCurrentReadBuffer( void )
2015 {
2016 GET_CURRENT_CONTEXT(ctx);
2017 if (ctx) {
2018 return XMESA_BUFFER(ctx->ReadBuffer);
2019 }
2020 else {
2021 return 0;
2022 }
2023 }
2024
2025
2026 #ifdef XFree86Server
2027 PUBLIC
2028 GLboolean XMesaForceCurrent(XMesaContext c)
2029 {
2030 if (c) {
2031 _glapi_set_dispatch(c->mesa.CurrentDispatch);
2032
2033 if (&(c->mesa) != _mesa_get_current_context()) {
2034 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer);
2035 }
2036 }
2037 else {
2038 _mesa_make_current(NULL, NULL, NULL);
2039 }
2040 return GL_TRUE;
2041 }
2042
2043
2044 PUBLIC
2045 GLboolean XMesaLoseCurrent(XMesaContext c)
2046 {
2047 (void) c;
2048 _mesa_make_current(NULL, NULL, NULL);
2049 return GL_TRUE;
2050 }
2051
2052
2053 PUBLIC
2054 GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask )
2055 {
2056 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
2057 return GL_TRUE;
2058 }
2059 #endif /* XFree86Server */
2060
2061
2062 #ifndef FX
2063 GLboolean XMesaSetFXmode( GLint mode )
2064 {
2065 (void) mode;
2066 return GL_FALSE;
2067 }
2068 #endif
2069
2070
2071
2072 /*
2073 * Copy the back buffer to the front buffer. If there's no back buffer
2074 * this is a no-op.
2075 */
2076 PUBLIC
2077 void XMesaSwapBuffers( XMesaBuffer b )
2078 {
2079 GET_CURRENT_CONTEXT(ctx);
2080
2081 if (!b->backxrb) {
2082 /* single buffered */
2083 return;
2084 }
2085
2086 /* If we're swapping the buffer associated with the current context
2087 * we have to flush any pending rendering commands first.
2088 */
2089 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2090 _mesa_notifySwapBuffers(ctx);
2091
2092 if (b->db_mode) {
2093 #ifdef FX
2094 if (FXswapBuffers(b))
2095 return;
2096 #endif
2097 if (b->backxrb->ximage) {
2098 /* Copy Ximage (back buf) from client memory to server window */
2099 #if defined(USE_XSHM) && !defined(XFree86Server)
2100 if (b->shm) {
2101 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2102 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2103 b->swapgc,
2104 b->backxrb->ximage, 0, 0,
2105 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2106 False );
2107 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2108 }
2109 else
2110 #endif
2111 {
2112 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2113 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2114 b->swapgc,
2115 b->backxrb->ximage, 0, 0,
2116 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
2117 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2118 }
2119 }
2120 else if (b->backxrb->pixmap) {
2121 /* Copy pixmap (back buf) to window (front buf) on server */
2122 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2123 XMesaCopyArea( b->xm_visual->display,
2124 b->backxrb->pixmap, /* source drawable */
2125 b->frontxrb->drawable, /* dest. drawable */
2126 b->swapgc,
2127 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2128 0, 0 /* dest region */
2129 );
2130 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2131 }
2132
2133 if (b->swAlpha)
2134 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer);
2135 }
2136 #if !defined(XFree86Server)
2137 XSync( b->xm_visual->display, False );
2138 #endif
2139 }
2140
2141
2142
2143 /*
2144 * Copy sub-region of back buffer to front buffer
2145 */
2146 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2147 {
2148 GET_CURRENT_CONTEXT(ctx);
2149
2150 /* If we're swapping the buffer associated with the current context
2151 * we have to flush any pending rendering commands first.
2152 */
2153 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2154 _mesa_notifySwapBuffers(ctx);
2155
2156 if (!b->backxrb) {
2157 /* single buffered */
2158 return;
2159 }
2160
2161 if (b->db_mode) {
2162 int yTop = b->mesa_buffer.Height - y - height;
2163 #ifdef FX
2164 if (FXswapBuffers(b))
2165 return;
2166 #endif
2167 if (b->backxrb->ximage) {
2168 /* Copy Ximage from host's memory to server's window */
2169 #if defined(USE_XSHM) && !defined(XFree86Server)
2170 if (b->shm) {
2171 /* XXX assuming width and height aren't too large! */
2172 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2173 b->swapgc,
2174 b->backxrb->ximage, x, yTop,
2175 x, yTop, width, height, False );
2176 /* wait for finished event??? */
2177 }
2178 else
2179 #endif
2180 {
2181 /* XXX assuming width and height aren't too large! */
2182 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2183 b->swapgc,
2184 b->backxrb->ximage, x, yTop,
2185 x, yTop, width, height );
2186 }
2187 }
2188 else {
2189 /* Copy pixmap to window on server */
2190 XMesaCopyArea( b->xm_visual->display,
2191 b->backxrb->pixmap, /* source drawable */
2192 b->frontxrb->drawable, /* dest. drawable */
2193 b->swapgc,
2194 x, yTop, width, height, /* source region */
2195 x, yTop /* dest region */
2196 );
2197 }
2198 }
2199 }
2200
2201
2202 /*
2203 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2204 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2205 * back buffer directly.
2206 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2207 * ximage - pointer to back buffer's XImage, or NULL
2208 * Return: GL_TRUE = context is double buffered
2209 * GL_FALSE = context is single buffered
2210 */
2211 #ifndef XFree86Server
2212 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2213 XMesaPixmap *pixmap,
2214 XMesaImage **ximage )
2215 {
2216 if (b->db_mode) {
2217 if (pixmap)
2218 *pixmap = b->backxrb->pixmap;
2219 if (ximage)
2220 *ximage = b->backxrb->ximage;
2221 return GL_TRUE;
2222 }
2223 else {
2224 *pixmap = 0;
2225 *ximage = NULL;
2226 return GL_FALSE;
2227 }
2228 }
2229 #endif /* XFree86Server */
2230
2231
2232 /*
2233 * Return the depth buffer associated with an XMesaBuffer.
2234 * Input: b - the XMesa buffer handle
2235 * Output: width, height - size of buffer in pixels
2236 * bytesPerValue - bytes per depth value (2 or 4)
2237 * buffer - pointer to depth buffer values
2238 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2239 */
2240 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2241 GLint *bytesPerValue, void **buffer )
2242 {
2243 struct gl_renderbuffer *rb
2244 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
2245 if (!rb || !rb->Data) {
2246 *width = 0;
2247 *height = 0;
2248 *bytesPerValue = 0;
2249 *buffer = 0;
2250 return GL_FALSE;
2251 }
2252 else {
2253 *width = b->mesa_buffer.Width;
2254 *height = b->mesa_buffer.Height;
2255 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
2256 ? sizeof(GLushort) : sizeof(GLuint);
2257 *buffer = rb->Data;
2258 return GL_TRUE;
2259 }
2260 }
2261
2262
2263 void XMesaFlush( XMesaContext c )
2264 {
2265 if (c && c->xm_visual) {
2266 #ifdef XFree86Server
2267 /* NOT_NEEDED */
2268 #else
2269 XSync( c->xm_visual->display, False );
2270 #endif
2271 }
2272 }
2273
2274
2275
2276 const char *XMesaGetString( XMesaContext c, int name )
2277 {
2278 (void) c;
2279 if (name==XMESA_VERSION) {
2280 return "5.0";
2281 }
2282 else if (name==XMESA_EXTENSIONS) {
2283 return "";
2284 }
2285 else {
2286 return NULL;
2287 }
2288 }
2289
2290
2291
2292 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2293 {
2294 XMesaBuffer b;
2295 for (b=XMesaBufferList; b; b=b->Next) {
2296 if (b->frontxrb->drawable == d && b->display == dpy) {
2297 return b;
2298 }
2299 }
2300 return NULL;
2301 }
2302
2303
2304 /**
2305 * Free/destroy all XMesaBuffers associated with given display.
2306 */
2307 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
2308 {
2309 XMesaBuffer b, next;
2310 for (b = XMesaBufferList; b; b = next) {
2311 next = b->Next;
2312 if (b->display == dpy) {
2313 xmesa_free_buffer(b);
2314 }
2315 }
2316 }
2317
2318
2319 /*
2320 * Look for XMesaBuffers whose X window has been destroyed.
2321 * Deallocate any such XMesaBuffers.
2322 */
2323 void XMesaGarbageCollect( void )
2324 {
2325 XMesaBuffer b, next;
2326 for (b=XMesaBufferList; b; b=next) {
2327 next = b->Next;
2328 if (b->display && b->frontxrb->drawable && b->type == WINDOW) {
2329 #ifdef XFree86Server
2330 /* NOT_NEEDED */
2331 #else
2332 XSync(b->display, False);
2333 if (!window_exists( b->display, b->frontxrb->drawable )) {
2334 /* found a dead window, free the ancillary info */
2335 XMesaDestroyBuffer( b );
2336 }
2337 #endif
2338 }
2339 }
2340 }
2341
2342
2343 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2344 GLfloat red, GLfloat green,
2345 GLfloat blue, GLfloat alpha )
2346 {
2347 GLcontext *ctx = &xmesa->mesa;
2348 GLint r = (GLint) (red * 255.0F);
2349 GLint g = (GLint) (green * 255.0F);
2350 GLint b = (GLint) (blue * 255.0F);
2351 GLint a = (GLint) (alpha * 255.0F);
2352
2353 switch (xmesa->pixelformat) {
2354 case PF_Index:
2355 return 0;
2356 case PF_Truecolor:
2357 {
2358 unsigned long p;
2359 PACK_TRUECOLOR( p, r, g, b );
2360 return p;
2361 }
2362 case PF_8A8B8G8R:
2363 return PACK_8A8B8G8R( r, g, b, a );
2364 case PF_8A8R8G8B:
2365 return PACK_8A8R8G8B( r, g, b, a );
2366 case PF_8R8G8B:
2367 return PACK_8R8G8B( r, g, b );
2368 case PF_5R6G5B:
2369 return PACK_5R6G5B( r, g, b );
2370 case PF_Dither:
2371 {
2372 DITHER_SETUP;
2373 return DITHER( x, y, r, g, b );
2374 }
2375 case PF_1Bit:
2376 /* 382 = (3*255)/2 */
2377 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2378 case PF_HPCR:
2379 return DITHER_HPCR(x, y, r, g, b);
2380 case PF_Lookup:
2381 {
2382 LOOKUP_SETUP;
2383 return LOOKUP( r, g, b );
2384 }
2385 case PF_Grayscale:
2386 return GRAY_RGB( r, g, b );
2387 case PF_Dither_5R6G5B:
2388 /* fall through */
2389 case PF_Dither_True:
2390 {
2391 unsigned long p;
2392 PACK_TRUEDITHER(p, x, y, r, g, b);
2393 return p;
2394 }
2395 default:
2396 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
2397 }
2398 return 0;
2399 }
2400
2401
2402 /*
2403 * This is typically called when the window size changes and we need
2404 * to reallocate the buffer's back/depth/stencil/accum buffers.
2405 */
2406 PUBLIC void
2407 XMesaResizeBuffers( XMesaBuffer b )
2408 {
2409 GET_CURRENT_CONTEXT(ctx);
2410 XMesaContext xmctx = XMESA_CONTEXT(ctx);
2411 if (!xmctx)
2412 return;
2413 xmesa_check_and_update_buffer_size(xmctx, b);
2414 }
2415
2416
2417 static GLint
2418 xbuffer_to_renderbuffer(int buffer)
2419 {
2420 assert(MAX_AUX_BUFFERS <= 4);
2421
2422 switch (buffer) {
2423 case GLX_FRONT_LEFT_EXT:
2424 return BUFFER_FRONT_LEFT;
2425 case GLX_FRONT_RIGHT_EXT:
2426 return BUFFER_FRONT_RIGHT;
2427 case GLX_BACK_LEFT_EXT:
2428 return BUFFER_BACK_LEFT;
2429 case GLX_BACK_RIGHT_EXT:
2430 return BUFFER_BACK_RIGHT;
2431 case GLX_AUX0_EXT:
2432 return BUFFER_AUX0;
2433 case GLX_AUX1_EXT:
2434 case GLX_AUX2_EXT:
2435 case GLX_AUX3_EXT:
2436 case GLX_AUX4_EXT:
2437 case GLX_AUX5_EXT:
2438 case GLX_AUX6_EXT:
2439 case GLX_AUX7_EXT:
2440 case GLX_AUX8_EXT:
2441 case GLX_AUX9_EXT:
2442 default:
2443 /* BadValue error */
2444 return -1;
2445 }
2446 }
2447
2448
2449 PUBLIC void
2450 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
2451 const int *attrib_list)
2452 {
2453 #if 0
2454 GET_CURRENT_CONTEXT(ctx);
2455 const GLuint unit = ctx->Texture.CurrentUnit;
2456 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
2457 struct gl_texture_object *texObj;
2458 #endif
2459 struct gl_renderbuffer *rb;
2460 struct xmesa_renderbuffer *xrb;
2461 GLint b;
2462 XMesaImage *img = NULL;
2463 GLboolean freeImg = GL_FALSE;
2464
2465 b = xbuffer_to_renderbuffer(buffer);
2466 if (b < 0)
2467 return;
2468
2469 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
2470 return; /* BadMatch error */
2471
2472 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
2473 if (!rb) {
2474 /* invalid buffer */
2475 return;
2476 }
2477 xrb = xmesa_renderbuffer(rb);
2478
2479 #if 0
2480 switch (drawable->TextureTarget) {
2481 case GLX_TEXTURE_1D_EXT:
2482 texObj = texUnit->CurrentTex[TEXTURE_1D_INDEX];
2483 break;
2484 case GLX_TEXTURE_2D_EXT:
2485 texObj = texUnit->CurrentTex[TEXTURE_2D_INDEX];
2486 break;
2487 case GLX_TEXTURE_RECTANGLE_EXT:
2488 texObj = texUnit->CurrentTex[TEXTURE_RECT_INDEX];
2489 break;
2490 default:
2491 return; /* BadMatch error */
2492 }
2493 #endif
2494
2495 /*
2496 * The following is a quick and simple way to implement
2497 * BindTexImage. The better way is to write some new FetchTexel()
2498 * functions which would extract texels from XImages. We'd still
2499 * need to use GetImage when texturing from a Pixmap (front buffer)
2500 * but texturing from a back buffer (XImage) would avoid an image
2501 * copy.
2502 */
2503
2504 /* get XImage */
2505 if (xrb->pixmap) {
2506 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
2507 ZPixmap);
2508 freeImg = GL_TRUE;
2509 }
2510 else if (xrb->ximage) {
2511 img = xrb->ximage;
2512 }
2513
2514 /* store the XImage as a new texture image */
2515 if (img) {
2516 GLenum format, type, intFormat;
2517 if (img->bits_per_pixel == 32) {
2518 format = GL_BGRA;
2519 type = GL_UNSIGNED_BYTE;
2520 intFormat = GL_RGBA;
2521 }
2522 else if (img->bits_per_pixel == 24) {
2523 format = GL_BGR;
2524 type = GL_UNSIGNED_BYTE;
2525 intFormat = GL_RGB;
2526 }
2527 else if (img->bits_per_pixel == 16) {
2528 format = GL_BGR;
2529 type = GL_UNSIGNED_SHORT_5_6_5;
2530 intFormat = GL_RGB;
2531 }
2532 else {
2533 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
2534 return;
2535 }
2536 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2537 intFormat = GL_RGBA;
2538 }
2539 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
2540 intFormat = GL_RGB;
2541 }
2542
2543 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
2544 format, type, img->data);
2545
2546 if (freeImg) {
2547 XMesaDestroyImage(img);
2548 }
2549 }
2550 }
2551
2552
2553
2554 PUBLIC void
2555 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
2556 {
2557 const GLint b = xbuffer_to_renderbuffer(buffer);
2558 if (b < 0)
2559 return;
2560
2561 /* no-op for now */
2562 }
2563