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Merge branch 'master' into gallium-0.2
[mesa.git] / src / mesa / drivers / x11 / xm_api.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.1
4 *
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 /**
26 * \file xm_api.c
27 *
28 * All the XMesa* API functions.
29 *
30 *
31 * NOTES:
32 *
33 * The window coordinate system origin (0,0) is in the lower-left corner
34 * of the window. X11's window coordinate origin is in the upper-left
35 * corner of the window. Therefore, most drawing functions in this
36 * file have to flip Y coordinates.
37 *
38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
39 * in support for the MIT Shared Memory extension. If enabled, when you
40 * use an Ximage for the back buffer in double buffered mode, the "swap"
41 * operation will be faster. You must also link with -lXext.
42 *
43 * Byte swapping: If the Mesa host and the X display use a different
44 * byte order then there's some trickiness to be aware of when using
45 * XImages. The byte ordering used for the XImage is that of the X
46 * display, not the Mesa host.
47 * The color-to-pixel encoding for True/DirectColor must be done
48 * according to the display's visual red_mask, green_mask, and blue_mask.
49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
50 * do byte swapping if needed. If one wants to directly "poke" the pixel
51 * into the XImage's buffer then the pixel must be byte swapped first. In
52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
53 * and use XPutPixel everywhere except in the implementation of
54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
55 * instead of using XPutPixel we "poke" our values after byte-swapping
56 * the clear pixel value if needed.
57 *
58 */
59
60 #ifdef __CYGWIN__
61 #undef WIN32
62 #undef __WIN32__
63 #endif
64
65 #include "glxheader.h"
66 #include "GL/xmesa.h"
67 #include "xmesaP.h"
68 #include "main/context.h"
69 #include "main/extensions.h"
70 #include "main/framebuffer.h"
71 #include "main/imports.h"
72 #include "main/macros.h"
73 #include "main/renderbuffer.h"
74 #include "main/teximage.h"
75 #include "glapi/glthread.h"
76 #include "swrast/swrast.h"
77 #include "swrast_setup/swrast_setup.h"
78 #include "vbo/vbo.h"
79 #if 0
80 #include "tnl/tnl.h"
81 #include "tnl/t_context.h"
82 #include "tnl/t_pipeline.h"
83 #endif
84 #include "drivers/common/driverfuncs.h"
85
86 #include "state_tracker/st_public.h"
87 #include "state_tracker/st_context.h"
88 #include "softpipe/sp_context.h"
89 #include "pipe/p_defines.h"
90
91 /**
92 * Global X driver lock
93 */
94 _glthread_Mutex _xmesa_lock;
95
96
97
98 /**
99 * Lookup tables for HPCR pixel format:
100 */
101 static short hpcr_rgbTbl[3][256] = {
102 {
103 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
104 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
105 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
106 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
107 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
108 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
109 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
110 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
111 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
112 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
113 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
114 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
115 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
116 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
117 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
118 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
119 },
120 {
121 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
122 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
123 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
124 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
125 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
126 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
127 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
128 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
129 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
130 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
131 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
132 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
133 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
134 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
135 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
136 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
137 },
138 {
139 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
140 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
141 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
142 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
143 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
144 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
145 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
146 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
147 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
148 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
149 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
150 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
151 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
152 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
153 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
154 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
155 }
156 };
157
158
159
160 /**********************************************************************/
161 /***** X Utility Functions *****/
162 /**********************************************************************/
163
164
165 /**
166 * Return the host's byte order as LSBFirst or MSBFirst ala X.
167 */
168 #ifndef XFree86Server
169 static int host_byte_order( void )
170 {
171 int i = 1;
172 char *cptr = (char *) &i;
173 return (*cptr==1) ? LSBFirst : MSBFirst;
174 }
175 #endif
176
177
178 /**
179 * Check if the X Shared Memory extension is available.
180 * Return: 0 = not available
181 * 1 = shared XImage support available
182 * 2 = shared Pixmap support available also
183 */
184 static int check_for_xshm( XMesaDisplay *display )
185 {
186 #if defined(USE_XSHM) && !defined(XFree86Server)
187 int major, minor, ignore;
188 Bool pixmaps;
189
190 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
191 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) {
192 return (pixmaps==True) ? 2 : 1;
193 }
194 else {
195 return 0;
196 }
197 }
198 else {
199 return 0;
200 }
201 #else
202 /* No XSHM support */
203 return 0;
204 #endif
205 }
206
207
208 /**
209 * Apply gamma correction to an intensity value in [0..max]. Return the
210 * new intensity value.
211 */
212 static GLint
213 gamma_adjust( GLfloat gamma, GLint value, GLint max )
214 {
215 if (gamma == 1.0) {
216 return value;
217 }
218 else {
219 double x = (double) value / (double) max;
220 return IROUND_POS((GLfloat) max * _mesa_pow(x, 1.0F/gamma));
221 }
222 }
223
224
225
226 /**
227 * Return the true number of bits per pixel for XImages.
228 * For example, if we request a 24-bit deep visual we may actually need/get
229 * 32bpp XImages. This function returns the appropriate bpp.
230 * Input: dpy - the X display
231 * visinfo - desribes the visual to be used for XImages
232 * Return: true number of bits per pixel for XImages
233 */
234 static int
235 bits_per_pixel( XMesaVisual xmv )
236 {
237 #ifdef XFree86Server
238 const int depth = xmv->nplanes;
239 int i;
240 assert(depth > 0);
241 for (i = 0; i < screenInfo.numPixmapFormats; i++) {
242 if (screenInfo.formats[i].depth == depth)
243 return screenInfo.formats[i].bitsPerPixel;
244 }
245 return depth; /* should never get here, but this should be safe */
246 #else
247 XMesaDisplay *dpy = xmv->display;
248 XMesaVisualInfo visinfo = xmv->visinfo;
249 XMesaImage *img;
250 int bitsPerPixel;
251 /* Create a temporary XImage */
252 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
253 ZPixmap, 0, /*format, offset*/
254 (char*) MALLOC(8), /*data*/
255 1, 1, /*width, height*/
256 32, /*bitmap_pad*/
257 0 /*bytes_per_line*/
258 );
259 assert(img);
260 /* grab the bits/pixel value */
261 bitsPerPixel = img->bits_per_pixel;
262 /* free the XImage */
263 _mesa_free( img->data );
264 img->data = NULL;
265 XMesaDestroyImage( img );
266 return bitsPerPixel;
267 #endif
268 }
269
270
271
272 /*
273 * Determine if a given X window ID is valid (window exists).
274 * Do this by calling XGetWindowAttributes() for the window and
275 * checking if we catch an X error.
276 * Input: dpy - the display
277 * win - the window to check for existance
278 * Return: GL_TRUE - window exists
279 * GL_FALSE - window doesn't exist
280 */
281 #ifndef XFree86Server
282 static GLboolean WindowExistsFlag;
283
284 static int window_exists_err_handler( XMesaDisplay* dpy, XErrorEvent* xerr )
285 {
286 (void) dpy;
287 if (xerr->error_code == BadWindow) {
288 WindowExistsFlag = GL_FALSE;
289 }
290 return 0;
291 }
292
293 static GLboolean window_exists( XMesaDisplay *dpy, Window win )
294 {
295 XWindowAttributes wa;
296 int (*old_handler)( XMesaDisplay*, XErrorEvent* );
297 WindowExistsFlag = GL_TRUE;
298 old_handler = XSetErrorHandler(window_exists_err_handler);
299 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
300 XSetErrorHandler(old_handler);
301 return WindowExistsFlag;
302 }
303
304 static Status
305 get_drawable_size( XMesaDisplay *dpy, Drawable d, GLuint *width, GLuint *height )
306 {
307 Window root;
308 Status stat;
309 int xpos, ypos;
310 unsigned int w, h, bw, depth;
311 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
312 *width = w;
313 *height = h;
314 return stat;
315 }
316 #endif
317
318
319 /**
320 * Return the size of the window (or pixmap) that corresponds to the
321 * given XMesaBuffer.
322 * \param width returns width in pixels
323 * \param height returns height in pixels
324 */
325 void
326 xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
327 GLuint *width, GLuint *height)
328 {
329 #ifdef XFree86Server
330 *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH);
331 *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT);
332 #else
333 Status stat;
334
335 _glthread_LOCK_MUTEX(_xmesa_lock);
336 XSync(b->xm_visual->display, 0); /* added for Chromium */
337 stat = get_drawable_size(dpy, b->frontxrb->pixmap, width, height);
338 _glthread_UNLOCK_MUTEX(_xmesa_lock);
339
340 if (!stat) {
341 /* probably querying a window that's recently been destroyed */
342 _mesa_warning(NULL, "XGetGeometry failed!\n");
343 *width = *height = 1;
344 }
345 #endif
346 }
347
348
349
350 /**********************************************************************/
351 /***** Linked list of XMesaBuffers *****/
352 /**********************************************************************/
353
354 XMesaBuffer XMesaBufferList = NULL;
355
356
357 /**
358 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
359 * Note that XMesaBuffer is derived from GLframebuffer.
360 * The new XMesaBuffer will not have any size (Width=Height=0).
361 *
362 * \param d the corresponding X drawable (window or pixmap)
363 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
364 * \param vis the buffer's visual
365 * \param cmap the window's colormap, if known.
366 * \return new XMesaBuffer or NULL if any problem
367 */
368 static XMesaBuffer
369 create_xmesa_buffer(XMesaDrawable d, BufferType type,
370 XMesaVisual vis, XMesaColormap cmap)
371 {
372 XMesaBuffer b;
373
374 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
375
376 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
377 if (!b)
378 return NULL;
379
380 b->display = vis->display;
381 b->xm_visual = vis;
382 b->type = type;
383 b->cmap = cmap;
384
385 _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
386 b->mesa_buffer.Delete = xmesa_delete_framebuffer;
387
388 /*
389 * Front renderbuffer
390 */
391 b->frontxrb = xmesa_create_renderbuffer(NULL, 0, &vis->mesa_visual, GL_FALSE);
392 if (!b->frontxrb) {
393 _mesa_free(b);
394 return NULL;
395 }
396 b->frontxrb->Parent = b;
397 b->frontxrb->drawable = d;
398 b->frontxrb->pixmap = (XMesaPixmap) d;
399 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
400 &b->frontxrb->St.Base);
401
402 /*
403 * Back renderbuffer
404 */
405 if (vis->mesa_visual.doubleBufferMode) {
406 b->backxrb = xmesa_create_renderbuffer(NULL, 0, &vis->mesa_visual, GL_TRUE);
407 if (!b->backxrb) {
408 /* XXX free front xrb too */
409 _mesa_free(b);
410 return NULL;
411 }
412 b->backxrb->Parent = b;
413 /* determine back buffer implementation */
414 b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
415
416 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
417 &b->backxrb->St.Base);
418 }
419
420 /*
421 * Software alpha planes
422 */
423 if (vis->mesa_visual.alphaBits > 0
424 && vis->undithered_pf != PF_8A8B8G8R
425 && vis->undithered_pf != PF_8A8R8G8B) {
426 /* Visual has alpha, but pixel format doesn't support it.
427 * We'll use an alpha renderbuffer wrapper.
428 */
429 b->swAlpha = GL_TRUE;
430 }
431 else {
432 b->swAlpha = GL_FALSE;
433 }
434
435 if (vis->mesa_visual.depthBits > 0 &&
436 vis->mesa_visual.stencilBits > 0) {
437 /* combined depth/stencil */
438 struct gl_renderbuffer *rb
439 = st_new_renderbuffer_fb(GL_DEPTH24_STENCIL8_EXT);
440 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_DEPTH, rb);
441 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_STENCIL, rb);
442 }
443 else {
444 if (vis->mesa_visual.depthBits > 0) {
445 struct gl_renderbuffer *rb
446 = st_new_renderbuffer_fb(GL_DEPTH_COMPONENT32);
447 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_DEPTH, rb);
448 }
449
450 if (vis->mesa_visual.stencilBits > 0) {
451 struct gl_renderbuffer *rb
452 = st_new_renderbuffer_fb(GL_STENCIL_INDEX8_EXT);
453 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_STENCIL, rb);
454 }
455 }
456
457 if (vis->mesa_visual.accumRedBits > 0) {
458 struct gl_renderbuffer *rb
459 = st_new_renderbuffer_fb(GL_RGBA16);
460 _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_ACCUM, rb);
461 }
462
463
464 /*
465 * Other renderbuffer (depth, stencil, etc)
466 */
467 _mesa_add_soft_renderbuffers(&b->mesa_buffer,
468 GL_FALSE, /* color */
469 GL_FALSE, /*vis->mesa_visual.haveDepthBuffer,*/
470 GL_FALSE, /* stencil */
471 GL_FALSE, /* accum */
472 b->swAlpha,
473 vis->mesa_visual.numAuxBuffers > 0 );
474
475 /* GLX_EXT_texture_from_pixmap */
476 b->TextureTarget = 0;
477 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
478 b->TextureMipmap = 0;
479
480 /* insert buffer into linked list */
481 b->Next = XMesaBufferList;
482 XMesaBufferList = b;
483
484 return b;
485 }
486
487
488 /**
489 * Find an XMesaBuffer by matching X display and colormap but NOT matching
490 * the notThis buffer.
491 */
492 XMesaBuffer
493 xmesa_find_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
494 {
495 XMesaBuffer b;
496 for (b=XMesaBufferList; b; b=b->Next) {
497 if (b->display==dpy && b->cmap==cmap && b!=notThis) {
498 return b;
499 }
500 }
501 return NULL;
502 }
503
504
505 /**
506 * Remove buffer from linked list, delete if no longer referenced.
507 */
508 static void
509 xmesa_free_buffer(XMesaBuffer buffer)
510 {
511 XMesaBuffer prev = NULL, b;
512
513 for (b = XMesaBufferList; b; b = b->Next) {
514 if (b == buffer) {
515 struct gl_framebuffer *fb = &buffer->mesa_buffer;
516
517 /* unlink buffer from list */
518 if (prev)
519 prev->Next = buffer->Next;
520 else
521 XMesaBufferList = buffer->Next;
522
523 /* mark as delete pending */
524 fb->DeletePending = GL_TRUE;
525
526 /* Since the X window for the XMesaBuffer is going away, we don't
527 * want to dereference this pointer in the future.
528 */
529 b->frontxrb->drawable = 0;
530
531 /* Unreference. If count = zero we'll really delete the buffer */
532 _mesa_unreference_framebuffer(&fb);
533
534 return;
535 }
536 /* continue search */
537 prev = b;
538 }
539 /* buffer not found in XMesaBufferList */
540 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
541 }
542
543
544 /**
545 * Copy X color table stuff from one XMesaBuffer to another.
546 */
547 static void
548 copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
549 {
550 MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table));
551 MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r));
552 MEMCPY(dst->pixel_to_g, src->pixel_to_g, sizeof(src->pixel_to_g));
553 MEMCPY(dst->pixel_to_b, src->pixel_to_b, sizeof(src->pixel_to_b));
554 dst->num_alloced = src->num_alloced;
555 MEMCPY(dst->alloced_colors, src->alloced_colors,
556 sizeof(src->alloced_colors));
557 }
558
559
560
561 /**********************************************************************/
562 /***** Misc Private Functions *****/
563 /**********************************************************************/
564
565
566 /**
567 * A replacement for XAllocColor. This function should never
568 * fail to allocate a color. When XAllocColor fails, we return
569 * the nearest matching color. If we have to allocate many colors
570 * this function isn't too efficient; the XQueryColors() could be
571 * done just once.
572 * Written by Michael Pichler, Brian Paul, Mark Kilgard
573 * Input: dpy - X display
574 * cmap - X colormap
575 * cmapSize - size of colormap
576 * In/Out: color - the XColor struct
577 * Output: exact - 1=exact color match, 0=closest match
578 * alloced - 1=XAlloc worked, 0=XAlloc failed
579 */
580 static void
581 noFaultXAllocColor( int client,
582 XMesaDisplay *dpy,
583 XMesaColormap cmap,
584 int cmapSize,
585 XMesaColor *color,
586 int *exact, int *alloced )
587 {
588 #ifdef XFree86Server
589 Pixel *ppixIn;
590 xrgb *ctable;
591 #else
592 /* we'll try to cache ctable for better remote display performance */
593 static Display *prevDisplay = NULL;
594 static XMesaColormap prevCmap = 0;
595 static int prevCmapSize = 0;
596 static XMesaColor *ctable = NULL;
597 #endif
598 XMesaColor subColor;
599 int i, bestmatch;
600 double mindist; /* 3*2^16^2 exceeds long int precision. */
601
602 (void) client;
603
604 /* First try just using XAllocColor. */
605 #ifdef XFree86Server
606 if (AllocColor(cmap,
607 &color->red, &color->green, &color->blue,
608 &color->pixel,
609 client) == Success)
610 #else
611 if (XAllocColor(dpy, cmap, color))
612 #endif
613 {
614 *exact = 1;
615 *alloced = 1;
616 return;
617 }
618
619 /* Alloc failed, search for closest match */
620
621 /* Retrieve color table entries. */
622 /* XXX alloca candidate. */
623 #ifdef XFree86Server
624 ppixIn = (Pixel *) MALLOC(cmapSize * sizeof(Pixel));
625 ctable = (xrgb *) MALLOC(cmapSize * sizeof(xrgb));
626 for (i = 0; i < cmapSize; i++) {
627 ppixIn[i] = i;
628 }
629 QueryColors(cmap, cmapSize, ppixIn, ctable);
630 #else
631 if (prevDisplay != dpy || prevCmap != cmap
632 || prevCmapSize != cmapSize || !ctable) {
633 /* free previously cached color table */
634 if (ctable)
635 _mesa_free(ctable);
636 /* Get the color table from X */
637 ctable = (XMesaColor *) MALLOC(cmapSize * sizeof(XMesaColor));
638 assert(ctable);
639 for (i = 0; i < cmapSize; i++) {
640 ctable[i].pixel = i;
641 }
642 XQueryColors(dpy, cmap, ctable, cmapSize);
643 prevDisplay = dpy;
644 prevCmap = cmap;
645 prevCmapSize = cmapSize;
646 }
647 #endif
648
649 /* Find best match. */
650 bestmatch = -1;
651 mindist = 0.0;
652 for (i = 0; i < cmapSize; i++) {
653 double dr = 0.30 * ((double) color->red - (double) ctable[i].red);
654 double dg = 0.59 * ((double) color->green - (double) ctable[i].green);
655 double db = 0.11 * ((double) color->blue - (double) ctable[i].blue);
656 double dist = dr * dr + dg * dg + db * db;
657 if (bestmatch < 0 || dist < mindist) {
658 bestmatch = i;
659 mindist = dist;
660 }
661 }
662
663 /* Return result. */
664 subColor.red = ctable[bestmatch].red;
665 subColor.green = ctable[bestmatch].green;
666 subColor.blue = ctable[bestmatch].blue;
667 /* Try to allocate the closest match color. This should only
668 * fail if the cell is read/write. Otherwise, we're incrementing
669 * the cell's reference count.
670 */
671 #ifdef XFree86Server
672 if (AllocColor(cmap,
673 &subColor.red, &subColor.green, &subColor.blue,
674 &subColor.pixel,
675 client) == Success) {
676 #else
677 if (XAllocColor(dpy, cmap, &subColor)) {
678 #endif
679 *alloced = 1;
680 }
681 else {
682 /* do this to work around a problem reported by Frank Ortega */
683 subColor.pixel = (unsigned long) bestmatch;
684 subColor.red = ctable[bestmatch].red;
685 subColor.green = ctable[bestmatch].green;
686 subColor.blue = ctable[bestmatch].blue;
687 subColor.flags = DoRed | DoGreen | DoBlue;
688 *alloced = 0;
689 }
690 #ifdef XFree86Server
691 _mesa_free(ppixIn);
692 _mesa_free(ctable);
693 #else
694 /* don't free table, save it for next time */
695 #endif
696
697 *color = subColor;
698 *exact = 0;
699 }
700
701
702
703 /**
704 * Do setup for PF_GRAYSCALE pixel format.
705 * Note that buffer may be NULL.
706 */
707 static GLboolean
708 setup_grayscale(int client, XMesaVisual v,
709 XMesaBuffer buffer, XMesaColormap cmap)
710 {
711 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
712 return GL_FALSE;
713 }
714
715 if (buffer) {
716 XMesaBuffer prevBuffer;
717
718 if (!cmap) {
719 return GL_FALSE;
720 }
721
722 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
723 if (prevBuffer &&
724 (buffer->xm_visual->mesa_visual.rgbMode ==
725 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
726 /* Copy colormap stuff from previous XMesaBuffer which uses same
727 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
728 */
729 copy_colortable_info(buffer, prevBuffer);
730 }
731 else {
732 /* Allocate 256 shades of gray */
733 int gray;
734 int colorsfailed = 0;
735 for (gray=0;gray<256;gray++) {
736 GLint r = gamma_adjust( v->RedGamma, gray, 255 );
737 GLint g = gamma_adjust( v->GreenGamma, gray, 255 );
738 GLint b = gamma_adjust( v->BlueGamma, gray, 255 );
739 int exact, alloced;
740 XMesaColor xcol;
741 xcol.red = (r << 8) | r;
742 xcol.green = (g << 8) | g;
743 xcol.blue = (b << 8) | b;
744 noFaultXAllocColor( client, v->display,
745 cmap, GET_COLORMAP_SIZE(v),
746 &xcol, &exact, &alloced );
747 if (!exact) {
748 colorsfailed++;
749 }
750 if (alloced) {
751 assert(buffer->num_alloced<256);
752 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
753 buffer->num_alloced++;
754 }
755
756 /*OLD
757 assert(gray < 576);
758 buffer->color_table[gray*3+0] = xcol.pixel;
759 buffer->color_table[gray*3+1] = xcol.pixel;
760 buffer->color_table[gray*3+2] = xcol.pixel;
761 assert(xcol.pixel < 65536);
762 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
763 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
764 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
765 */
766 buffer->color_table[gray] = xcol.pixel;
767 assert(xcol.pixel < 65536);
768 buffer->pixel_to_r[xcol.pixel] = gray;
769 buffer->pixel_to_g[xcol.pixel] = gray;
770 buffer->pixel_to_b[xcol.pixel] = gray;
771 }
772
773 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
774 _mesa_warning(NULL,
775 "Note: %d out of 256 needed colors do not match exactly.\n",
776 colorsfailed );
777 }
778 }
779 }
780
781 v->dithered_pf = PF_Grayscale;
782 v->undithered_pf = PF_Grayscale;
783 return GL_TRUE;
784 }
785
786
787
788 /**
789 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
790 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
791 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
792 * color. While this function was originally designed just for 8-bit
793 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
794 * Dithering code contributed by Bob Mercier.
795 */
796 static GLboolean
797 setup_dithered_color(int client, XMesaVisual v,
798 XMesaBuffer buffer, XMesaColormap cmap)
799 {
800 if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
801 return GL_FALSE;
802 }
803
804 if (buffer) {
805 XMesaBuffer prevBuffer;
806
807 if (!cmap) {
808 return GL_FALSE;
809 }
810
811 prevBuffer = xmesa_find_buffer(v->display, cmap, buffer);
812 if (prevBuffer &&
813 (buffer->xm_visual->mesa_visual.rgbMode ==
814 prevBuffer->xm_visual->mesa_visual.rgbMode)) {
815 /* Copy colormap stuff from previous, matching XMesaBuffer.
816 * Do this to avoid time spent in noFaultXAllocColor.
817 */
818 copy_colortable_info(buffer, prevBuffer);
819 }
820 else {
821 /* Allocate X colors and initialize color_table[], red_table[], etc */
822 int r, g, b, i;
823 int colorsfailed = 0;
824 for (r = 0; r < DITH_R; r++) {
825 for (g = 0; g < DITH_G; g++) {
826 for (b = 0; b < DITH_B; b++) {
827 XMesaColor xcol;
828 int exact, alloced;
829 xcol.red =gamma_adjust(v->RedGamma, r*65535/(DITH_R-1),65535);
830 xcol.green=gamma_adjust(v->GreenGamma, g*65535/(DITH_G-1),65535);
831 xcol.blue =gamma_adjust(v->BlueGamma, b*65535/(DITH_B-1),65535);
832 noFaultXAllocColor( client, v->display,
833 cmap, GET_COLORMAP_SIZE(v),
834 &xcol, &exact, &alloced );
835 if (!exact) {
836 colorsfailed++;
837 }
838 if (alloced) {
839 assert(buffer->num_alloced<256);
840 buffer->alloced_colors[buffer->num_alloced] = xcol.pixel;
841 buffer->num_alloced++;
842 }
843 i = DITH_MIX( r, g, b );
844 assert(i < 576);
845 buffer->color_table[i] = xcol.pixel;
846 assert(xcol.pixel < 65536);
847 buffer->pixel_to_r[xcol.pixel] = r * 255 / (DITH_R-1);
848 buffer->pixel_to_g[xcol.pixel] = g * 255 / (DITH_G-1);
849 buffer->pixel_to_b[xcol.pixel] = b * 255 / (DITH_B-1);
850 }
851 }
852 }
853
854 if (colorsfailed && _mesa_getenv("MESA_DEBUG")) {
855 _mesa_warning(NULL,
856 "Note: %d out of %d needed colors do not match exactly.\n",
857 colorsfailed, DITH_R * DITH_G * DITH_B );
858 }
859 }
860 }
861
862 v->dithered_pf = PF_Dither;
863 v->undithered_pf = PF_Lookup;
864 return GL_TRUE;
865 }
866
867
868 /**
869 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
870 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
871 * Special dithering tables have to be initialized.
872 */
873 static void
874 setup_8bit_hpcr(XMesaVisual v)
875 {
876 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
877 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
878 * on the root window AND the colormap obtainable by XGetRGBColormaps
879 * for that atom must be set on the window. (see also tkInitWindow)
880 * If that colormap is not set, the output will look stripy.
881 */
882
883 /* Setup color tables with gamma correction */
884 int i;
885 double g;
886
887 g = 1.0 / v->RedGamma;
888 for (i=0; i<256; i++) {
889 GLint red = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[0][i]/255.0, g ));
890 v->hpcr_rgbTbl[0][i] = CLAMP( red, 16, 239 );
891 }
892
893 g = 1.0 / v->GreenGamma;
894 for (i=0; i<256; i++) {
895 GLint green = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[1][i]/255.0, g ));
896 v->hpcr_rgbTbl[1][i] = CLAMP( green, 16, 239 );
897 }
898
899 g = 1.0 / v->BlueGamma;
900 for (i=0; i<256; i++) {
901 GLint blue = IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl[2][i]/255.0, g ));
902 v->hpcr_rgbTbl[2][i] = CLAMP( blue, 32, 223 );
903 }
904 v->undithered_pf = PF_HPCR; /* can't really disable dithering for now */
905 v->dithered_pf = PF_HPCR;
906
907 /* which method should I use to clear */
908 /* GL_FALSE: keep the ordinary method */
909 /* GL_TRUE : clear with dither pattern */
910 v->hpcr_clear_flag = _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE : GL_FALSE;
911
912 if (v->hpcr_clear_flag) {
913 v->hpcr_clear_pixmap = XMesaCreatePixmap(v->display,
914 DefaultRootWindow(v->display),
915 16, 2, 8);
916 #ifndef XFree86Server
917 v->hpcr_clear_ximage = XGetImage(v->display, v->hpcr_clear_pixmap,
918 0, 0, 16, 2, AllPlanes, ZPixmap);
919 #endif
920 }
921 }
922
923
924 /**
925 * Setup RGB rendering for a window with a True/DirectColor visual.
926 */
927 static void
928 setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
929 {
930 unsigned long rmask, gmask, bmask;
931 (void) buffer;
932 (void) cmap;
933
934 /* Compute red multiplier (mask) and bit shift */
935 v->rshift = 0;
936 rmask = GET_REDMASK(v);
937 while ((rmask & 1)==0) {
938 v->rshift++;
939 rmask = rmask >> 1;
940 }
941
942 /* Compute green multiplier (mask) and bit shift */
943 v->gshift = 0;
944 gmask = GET_GREENMASK(v);
945 while ((gmask & 1)==0) {
946 v->gshift++;
947 gmask = gmask >> 1;
948 }
949
950 /* Compute blue multiplier (mask) and bit shift */
951 v->bshift = 0;
952 bmask = GET_BLUEMASK(v);
953 while ((bmask & 1)==0) {
954 v->bshift++;
955 bmask = bmask >> 1;
956 }
957
958 /*
959 * Compute component-to-pixel lookup tables and dithering kernel
960 */
961 {
962 static GLubyte kernel[16] = {
963 0*16, 8*16, 2*16, 10*16,
964 12*16, 4*16, 14*16, 6*16,
965 3*16, 11*16, 1*16, 9*16,
966 15*16, 7*16, 13*16, 5*16,
967 };
968 GLint rBits = _mesa_bitcount(rmask);
969 GLint gBits = _mesa_bitcount(gmask);
970 GLint bBits = _mesa_bitcount(bmask);
971 GLint maxBits;
972 GLuint i;
973
974 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
975 for (i=0; i<=rmask; i++)
976 v->PixelToR[i] = (unsigned char) ((i * 255) / rmask);
977 for (i=0; i<=gmask; i++)
978 v->PixelToG[i] = (unsigned char) ((i * 255) / gmask);
979 for (i=0; i<=bmask; i++)
980 v->PixelToB[i] = (unsigned char) ((i * 255) / bmask);
981
982 /* convert RGB values from [0,255] to pixel components */
983
984 for (i=0;i<256;i++) {
985 GLint r = gamma_adjust(v->RedGamma, i, 255);
986 GLint g = gamma_adjust(v->GreenGamma, i, 255);
987 GLint b = gamma_adjust(v->BlueGamma, i, 255);
988 v->RtoPixel[i] = (r >> (8-rBits)) << v->rshift;
989 v->GtoPixel[i] = (g >> (8-gBits)) << v->gshift;
990 v->BtoPixel[i] = (b >> (8-bBits)) << v->bshift;
991 }
992 /* overflow protection */
993 for (i=256;i<512;i++) {
994 v->RtoPixel[i] = v->RtoPixel[255];
995 v->GtoPixel[i] = v->GtoPixel[255];
996 v->BtoPixel[i] = v->BtoPixel[255];
997 }
998
999 /* setup dithering kernel */
1000 maxBits = rBits;
1001 if (gBits > maxBits) maxBits = gBits;
1002 if (bBits > maxBits) maxBits = bBits;
1003 for (i=0;i<16;i++) {
1004 v->Kernel[i] = kernel[i] >> maxBits;
1005 }
1006
1007 v->undithered_pf = PF_Truecolor;
1008 v->dithered_pf = (GET_VISUAL_DEPTH(v)<24) ? PF_Dither_True : PF_Truecolor;
1009 }
1010
1011 /*
1012 * Now check for TrueColor visuals which we can optimize.
1013 */
1014 if ( GET_REDMASK(v) ==0x0000ff
1015 && GET_GREENMASK(v)==0x00ff00
1016 && GET_BLUEMASK(v) ==0xff0000
1017 && CHECK_BYTE_ORDER(v)
1018 && v->BitsPerPixel==32
1019 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1020 /* common 32 bpp config used on SGI, Sun */
1021 v->undithered_pf = v->dithered_pf = PF_8A8B8G8R; /* ABGR */
1022 }
1023 else if (GET_REDMASK(v) == 0xff0000
1024 && GET_GREENMASK(v)== 0x00ff00
1025 && GET_BLUEMASK(v) == 0x0000ff
1026 && CHECK_BYTE_ORDER(v)
1027 && v->RedGamma == 1.0 && v->GreenGamma == 1.0 && v->BlueGamma == 1.0){
1028 if (v->BitsPerPixel==32) {
1029 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
1030 if (GET_VISUAL_DEPTH(v) == 32 && v->mesa_visual.alphaBits == 8)
1031 v->undithered_pf = v->dithered_pf = PF_8A8R8G8B; /* ARGB */
1032 else
1033 v->undithered_pf = v->dithered_pf = PF_8R8G8B; /* xRGB */
1034 }
1035 else if (v->BitsPerPixel == 24) {
1036 v->undithered_pf = v->dithered_pf = PF_8R8G8B24; /* RGB */
1037 }
1038 }
1039 else if (GET_REDMASK(v) ==0xf800
1040 && GET_GREENMASK(v)==0x07e0
1041 && GET_BLUEMASK(v) ==0x001f
1042 && CHECK_BYTE_ORDER(v)
1043 && v->BitsPerPixel==16
1044 && v->RedGamma==1.0 && v->GreenGamma==1.0 && v->BlueGamma==1.0) {
1045 /* 5-6-5 RGB */
1046 v->undithered_pf = PF_5R6G5B;
1047 v->dithered_pf = PF_Dither_5R6G5B;
1048 }
1049 else if (GET_REDMASK(v) ==0xe0
1050 && GET_GREENMASK(v)==0x1c
1051 && GET_BLUEMASK(v) ==0x03
1052 && CHECK_FOR_HPCR(v)) {
1053 /* 8-bit HP color recovery */
1054 setup_8bit_hpcr( v );
1055 }
1056 }
1057
1058
1059
1060 /**
1061 * Setup RGB rendering for a window with a monochrome visual.
1062 */
1063 static void
1064 setup_monochrome( XMesaVisual v, XMesaBuffer b )
1065 {
1066 (void) b;
1067 v->dithered_pf = v->undithered_pf = PF_1Bit;
1068 /* if black=1 then we must flip pixel values */
1069 v->bitFlip = (GET_BLACK_PIXEL(v) != 0);
1070 }
1071
1072
1073
1074 /**
1075 * When a context is bound for the first time, we can finally finish
1076 * initializing the context's visual and buffer information.
1077 * \param v the XMesaVisual to initialize
1078 * \param b the XMesaBuffer to initialize (may be NULL)
1079 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1080 * \param window the window/pixmap we're rendering into
1081 * \param cmap the colormap associated with the window/pixmap
1082 * \return GL_TRUE=success, GL_FALSE=failure
1083 */
1084 static GLboolean
1085 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
1086 GLboolean rgb_flag, XMesaDrawable window,
1087 XMesaColormap cmap)
1088 {
1089 int client = 0;
1090
1091 #ifdef XFree86Server
1092 client = (window) ? CLIENT_ID(window->id) : 0;
1093 #endif
1094
1095 ASSERT(!b || b->xm_visual == v);
1096
1097 /* Save true bits/pixel */
1098 v->BitsPerPixel = bits_per_pixel(v);
1099 assert(v->BitsPerPixel > 0);
1100
1101 if (rgb_flag == GL_FALSE) {
1102 /* COLOR-INDEXED WINDOW:
1103 * Even if the visual is TrueColor or DirectColor we treat it as
1104 * being color indexed. This is weird but might be useful to someone.
1105 */
1106 v->dithered_pf = v->undithered_pf = PF_Index;
1107 v->mesa_visual.indexBits = GET_VISUAL_DEPTH(v);
1108 }
1109 else {
1110 /* RGB WINDOW:
1111 * We support RGB rendering into almost any kind of visual.
1112 */
1113 const int xclass = v->mesa_visual.visualType;
1114 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1115 setup_truecolor( v, b, cmap );
1116 }
1117 else if (xclass == GLX_STATIC_GRAY && GET_VISUAL_DEPTH(v) == 1) {
1118 setup_monochrome( v, b );
1119 }
1120 else if (xclass == GLX_GRAY_SCALE || xclass == GLX_STATIC_GRAY) {
1121 if (!setup_grayscale( client, v, b, cmap )) {
1122 return GL_FALSE;
1123 }
1124 }
1125 else if ((xclass == GLX_PSEUDO_COLOR || xclass == GLX_STATIC_COLOR)
1126 && GET_VISUAL_DEPTH(v)>=4 && GET_VISUAL_DEPTH(v)<=16) {
1127 if (!setup_dithered_color( client, v, b, cmap )) {
1128 return GL_FALSE;
1129 }
1130 }
1131 else {
1132 _mesa_warning(NULL, "XMesa: RGB mode rendering not supported in given visual.\n");
1133 return GL_FALSE;
1134 }
1135 v->mesa_visual.indexBits = 0;
1136
1137 if (_mesa_getenv("MESA_NO_DITHER")) {
1138 v->dithered_pf = v->undithered_pf;
1139 }
1140 }
1141
1142
1143 /*
1144 * If MESA_INFO env var is set print out some debugging info
1145 * which can help Brian figure out what's going on when a user
1146 * reports bugs.
1147 */
1148 if (_mesa_getenv("MESA_INFO")) {
1149 _mesa_printf("X/Mesa visual = %p\n", (void *) v);
1150 _mesa_printf("X/Mesa dithered pf = %u\n", v->dithered_pf);
1151 _mesa_printf("X/Mesa undithered pf = %u\n", v->undithered_pf);
1152 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level);
1153 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v));
1154 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
1155 }
1156
1157 if (b && window) {
1158 char *data;
1159
1160 /* Do window-specific initializations */
1161
1162 /* these should have been set in create_xmesa_buffer */
1163 ASSERT(b->frontxrb->drawable == window);
1164 ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
1165
1166 /* Setup for single/double buffering */
1167 if (v->mesa_visual.doubleBufferMode) {
1168 /* Double buffered */
1169 b->shm = check_for_xshm( v->display );
1170 }
1171
1172 /* X11 graphics contexts */
1173 #ifdef XFree86Server
1174 b->gc = CreateScratchGC(v->display, window->depth);
1175 #else
1176 b->gc = XCreateGC( v->display, window, 0, NULL );
1177 #endif
1178 XMesaSetFunction( v->display, b->gc, GXcopy );
1179
1180 /* cleargc - for glClear() */
1181 #ifdef XFree86Server
1182 b->cleargc = CreateScratchGC(v->display, window->depth);
1183 #else
1184 b->cleargc = XCreateGC( v->display, window, 0, NULL );
1185 #endif
1186 XMesaSetFunction( v->display, b->cleargc, GXcopy );
1187
1188 /*
1189 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1190 * Patch contributed by Michael Pichler May 15, 1995.
1191 */
1192 #ifdef XFree86Server
1193 b->swapgc = CreateScratchGC(v->display, window->depth);
1194 {
1195 CARD32 v[1];
1196 v[0] = FALSE;
1197 dixChangeGC(NullClient, b->swapgc, GCGraphicsExposures, v, NULL);
1198 }
1199 #else
1200 {
1201 XGCValues gcvalues;
1202 gcvalues.graphics_exposures = False;
1203 b->swapgc = XCreateGC(v->display, window,
1204 GCGraphicsExposures, &gcvalues);
1205 }
1206 #endif
1207 XMesaSetFunction( v->display, b->swapgc, GXcopy );
1208 /*
1209 * Set fill style and tile pixmap once for all for HPCR stuff
1210 * (instead of doing it each time in clear_color_HPCR_pixmap())
1211 * Initialize whole stuff
1212 * Patch contributed by Jacques Leroy March 8, 1998.
1213 */
1214 if (v->hpcr_clear_flag && b->backxrb && b->backxrb->pixmap) {
1215 int i;
1216 for (i = 0; i < 16; i++) {
1217 XMesaPutPixel(v->hpcr_clear_ximage, i, 0, 0);
1218 XMesaPutPixel(v->hpcr_clear_ximage, i, 1, 0);
1219 }
1220 XMesaPutImage(b->display, (XMesaDrawable) v->hpcr_clear_pixmap,
1221 b->cleargc, v->hpcr_clear_ximage, 0, 0, 0, 0, 16, 2);
1222 XMesaSetFillStyle( v->display, b->cleargc, FillTiled);
1223 XMesaSetTile( v->display, b->cleargc, v->hpcr_clear_pixmap );
1224 }
1225
1226 /* Initialize the row buffer XImage for use in write_color_span() */
1227 data = (char*) MALLOC(MAX_WIDTH*4);
1228 #ifdef XFree86Server
1229 b->rowimage = XMesaCreateImage(GET_VISUAL_DEPTH(v), MAX_WIDTH, 1, data);
1230 #else
1231 b->rowimage = XCreateImage( v->display,
1232 v->visinfo->visual,
1233 v->visinfo->depth,
1234 ZPixmap, 0, /*format, offset*/
1235 data, /*data*/
1236 MAX_WIDTH, 1, /*width, height*/
1237 32, /*bitmap_pad*/
1238 0 /*bytes_per_line*/ );
1239 #endif
1240 if (!b->rowimage)
1241 return GL_FALSE;
1242 }
1243
1244 return GL_TRUE;
1245 }
1246
1247
1248
1249 /*
1250 * Convert an RGBA color to a pixel value.
1251 */
1252 unsigned long
1253 xmesa_color_to_pixel(GLcontext *ctx,
1254 GLubyte r, GLubyte g, GLubyte b, GLubyte a,
1255 GLuint pixelFormat)
1256 {
1257 XMesaContext xmesa = XMESA_CONTEXT(ctx);
1258 switch (pixelFormat) {
1259 case PF_Index:
1260 return 0;
1261 case PF_Truecolor:
1262 {
1263 unsigned long p;
1264 PACK_TRUECOLOR( p, r, g, b );
1265 return p;
1266 }
1267 case PF_8A8B8G8R:
1268 return PACK_8A8B8G8R( r, g, b, a );
1269 case PF_8A8R8G8B:
1270 return PACK_8A8R8G8B( r, g, b, a );
1271 case PF_8R8G8B:
1272 /* fall through */
1273 case PF_8R8G8B24:
1274 return PACK_8R8G8B( r, g, b );
1275 case PF_5R6G5B:
1276 return PACK_5R6G5B( r, g, b );
1277 case PF_Dither:
1278 {
1279 DITHER_SETUP;
1280 return DITHER( 1, 0, r, g, b );
1281 }
1282 case PF_1Bit:
1283 /* 382 = (3*255)/2 */
1284 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
1285 case PF_HPCR:
1286 return DITHER_HPCR(1, 1, r, g, b);
1287 case PF_Lookup:
1288 {
1289 LOOKUP_SETUP;
1290 return LOOKUP( r, g, b );
1291 }
1292 case PF_Grayscale:
1293 return GRAY_RGB( r, g, b );
1294 case PF_Dither_True:
1295 /* fall through */
1296 case PF_Dither_5R6G5B:
1297 {
1298 unsigned long p;
1299 PACK_TRUEDITHER(p, 1, 0, r, g, b);
1300 return p;
1301 }
1302 default:
1303 _mesa_problem(ctx, "Bad pixel format in xmesa_color_to_pixel");
1304 }
1305 return 0;
1306 }
1307
1308
1309 #define NUM_VISUAL_TYPES 6
1310
1311 /**
1312 * Convert an X visual type to a GLX visual type.
1313 *
1314 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1315 * to be converted.
1316 * \return If \c visualType is a valid X visual type, a GLX visual type will
1317 * be returned. Otherwise \c GLX_NONE will be returned.
1318 *
1319 * \note
1320 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1321 * DRI CVS tree.
1322 */
1323 static GLint
1324 xmesa_convert_from_x_visual_type( int visualType )
1325 {
1326 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
1327 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
1328 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
1329 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
1330 };
1331
1332 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
1333 ? glx_visual_types[ visualType ] : GLX_NONE;
1334 }
1335
1336
1337 /**********************************************************************/
1338 /***** Public Functions *****/
1339 /**********************************************************************/
1340
1341
1342 #ifdef IN_DRI_DRIVER
1343 #define need_GL_VERSION_1_3
1344 #define need_GL_VERSION_1_4
1345 #define need_GL_VERSION_1_5
1346 #define need_GL_VERSION_2_0
1347
1348 /* sw extensions for imaging */
1349 #define need_GL_EXT_blend_color
1350 #define need_GL_EXT_blend_minmax
1351 #define need_GL_EXT_convolution
1352 #define need_GL_EXT_histogram
1353 #define need_GL_SGI_color_table
1354
1355 /* sw extensions not associated with some GL version */
1356 #define need_GL_ARB_shader_objects
1357 #define need_GL_ARB_vertex_program
1358 #define need_GL_APPLE_vertex_array_object
1359 #define need_GL_ATI_fragment_shader
1360 #define need_GL_EXT_depth_bounds_test
1361 #define need_GL_EXT_framebuffer_object
1362 #define need_GL_EXT_framebuffer_blit
1363 #define need_GL_EXT_gpu_program_parameters
1364 #define need_GL_EXT_paletted_texture
1365 #define need_GL_IBM_multimode_draw_arrays
1366 #define need_GL_MESA_resize_buffers
1367 #define need_GL_NV_vertex_program
1368 #define need_GL_NV_fragment_program
1369
1370 #include "extension_helper.h"
1371 #include "utils.h"
1372
1373 const struct dri_extension card_extensions[] =
1374 {
1375 { "GL_VERSION_1_3", GL_VERSION_1_3_functions },
1376 { "GL_VERSION_1_4", GL_VERSION_1_4_functions },
1377 { "GL_VERSION_1_5", GL_VERSION_1_5_functions },
1378 { "GL_VERSION_2_0", GL_VERSION_2_0_functions },
1379
1380 { "GL_EXT_blend_color", GL_EXT_blend_color_functions },
1381 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions },
1382 { "GL_EXT_convolution", GL_EXT_convolution_functions },
1383 { "GL_EXT_histogram", GL_EXT_histogram_functions },
1384 { "GL_SGI_color_table", GL_SGI_color_table_functions },
1385
1386 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions },
1387 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions },
1388 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions },
1389 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions },
1390 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions },
1391 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions },
1392 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions },
1393 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions },
1394 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions },
1395 { "GL_IBM_multimode_draw_arrays", GL_IBM_multimode_draw_arrays_functions },
1396 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions },
1397 { "GL_NV_vertex_program", GL_NV_vertex_program_functions },
1398 { "GL_NV_fragment_program", GL_NV_fragment_program_functions },
1399 { NULL, NULL }
1400 };
1401 #endif
1402
1403 /*
1404 * Create a new X/Mesa visual.
1405 * Input: display - X11 display
1406 * visinfo - an XVisualInfo pointer
1407 * rgb_flag - GL_TRUE = RGB mode,
1408 * GL_FALSE = color index mode
1409 * alpha_flag - alpha buffer requested?
1410 * db_flag - GL_TRUE = double-buffered,
1411 * GL_FALSE = single buffered
1412 * stereo_flag - stereo visual?
1413 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1414 * GL_FALSE = use an off-screen pixmap for back buffer
1415 * depth_size - requested bits/depth values, or zero
1416 * stencil_size - requested bits/stencil values, or zero
1417 * accum_red_size - requested bits/red accum values, or zero
1418 * accum_green_size - requested bits/green accum values, or zero
1419 * accum_blue_size - requested bits/blue accum values, or zero
1420 * accum_alpha_size - requested bits/alpha accum values, or zero
1421 * num_samples - number of samples/pixel if multisampling, or zero
1422 * level - visual level, usually 0
1423 * visualCaveat - ala the GLX extension, usually GLX_NONE
1424 * Return; a new XMesaVisual or 0 if error.
1425 */
1426 PUBLIC
1427 XMesaVisual XMesaCreateVisual( XMesaDisplay *display,
1428 XMesaVisualInfo visinfo,
1429 GLboolean rgb_flag,
1430 GLboolean alpha_flag,
1431 GLboolean db_flag,
1432 GLboolean stereo_flag,
1433 GLboolean ximage_flag,
1434 GLint depth_size,
1435 GLint stencil_size,
1436 GLint accum_red_size,
1437 GLint accum_green_size,
1438 GLint accum_blue_size,
1439 GLint accum_alpha_size,
1440 GLint num_samples,
1441 GLint level,
1442 GLint visualCaveat )
1443 {
1444 char *gamma;
1445 XMesaVisual v;
1446 GLint red_bits, green_bits, blue_bits, alpha_bits;
1447
1448 #ifdef IN_DRI_DRIVER
1449 /* driInitExtensions() should be called once per screen to setup extension
1450 * indices. There is no need to call it when the context is created since
1451 * XMesa enables mesa sw extensions on its own.
1452 */
1453 driInitExtensions( NULL, card_extensions, GL_FALSE );
1454 #endif
1455
1456 #ifndef XFree86Server
1457 /* For debugging only */
1458 if (_mesa_getenv("MESA_XSYNC")) {
1459 /* This makes debugging X easier.
1460 * In your debugger, set a breakpoint on _XError to stop when an
1461 * X protocol error is generated.
1462 */
1463 XSynchronize( display, 1 );
1464 }
1465 #endif
1466
1467 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
1468 if (!v) {
1469 return NULL;
1470 }
1471
1472 v->display = display;
1473
1474 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1475 * the struct but we may need some of the information contained in it
1476 * at a later time.
1477 */
1478 #ifndef XFree86Server
1479 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
1480 if(!v->visinfo) {
1481 _mesa_free(v);
1482 return NULL;
1483 }
1484 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
1485 #endif
1486
1487 /* check for MESA_GAMMA environment variable */
1488 gamma = _mesa_getenv("MESA_GAMMA");
1489 if (gamma) {
1490 v->RedGamma = v->GreenGamma = v->BlueGamma = 0.0;
1491 sscanf( gamma, "%f %f %f", &v->RedGamma, &v->GreenGamma, &v->BlueGamma );
1492 if (v->RedGamma<=0.0) v->RedGamma = 1.0;
1493 if (v->GreenGamma<=0.0) v->GreenGamma = v->RedGamma;
1494 if (v->BlueGamma<=0.0) v->BlueGamma = v->RedGamma;
1495 }
1496 else {
1497 v->RedGamma = v->GreenGamma = v->BlueGamma = 1.0;
1498 }
1499
1500 v->ximage_flag = ximage_flag;
1501
1502 #ifdef XFree86Server
1503 /* We could calculate these values by ourselves. nplanes is either the sum
1504 * of the red, green, and blue bits or the number index bits.
1505 * ColormapEntries is either (1U << index_bits) or
1506 * (1U << max(redBits, greenBits, blueBits)).
1507 */
1508 assert(visinfo->nplanes > 0);
1509 v->nplanes = visinfo->nplanes;
1510 v->ColormapEntries = visinfo->ColormapEntries;
1511
1512 v->mesa_visual.redMask = visinfo->redMask;
1513 v->mesa_visual.greenMask = visinfo->greenMask;
1514 v->mesa_visual.blueMask = visinfo->blueMask;
1515 v->mesa_visual.visualID = visinfo->vid;
1516 v->mesa_visual.screen = 0; /* FIXME: What should be done here? */
1517 #else
1518 v->mesa_visual.redMask = visinfo->red_mask;
1519 v->mesa_visual.greenMask = visinfo->green_mask;
1520 v->mesa_visual.blueMask = visinfo->blue_mask;
1521 v->mesa_visual.visualID = visinfo->visualid;
1522 v->mesa_visual.screen = visinfo->screen;
1523 #endif
1524
1525 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1526 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
1527 #else
1528 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
1529 #endif
1530
1531 v->mesa_visual.visualRating = visualCaveat;
1532
1533 if (alpha_flag)
1534 v->mesa_visual.alphaBits = 8;
1535
1536 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
1537
1538 {
1539 const int xclass = v->mesa_visual.visualType;
1540 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
1541 red_bits = _mesa_bitcount(GET_REDMASK(v));
1542 green_bits = _mesa_bitcount(GET_GREENMASK(v));
1543 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
1544 }
1545 else {
1546 /* this is an approximation */
1547 int depth;
1548 depth = GET_VISUAL_DEPTH(v);
1549 red_bits = depth / 3;
1550 depth -= red_bits;
1551 green_bits = depth / 2;
1552 depth -= green_bits;
1553 blue_bits = depth;
1554 alpha_bits = 0;
1555 assert( red_bits + green_bits + blue_bits == GET_VISUAL_DEPTH(v) );
1556 }
1557 alpha_bits = v->mesa_visual.alphaBits;
1558 }
1559
1560 _mesa_initialize_visual( &v->mesa_visual,
1561 rgb_flag, db_flag, stereo_flag,
1562 red_bits, green_bits,
1563 blue_bits, alpha_bits,
1564 v->mesa_visual.indexBits,
1565 depth_size,
1566 stencil_size,
1567 accum_red_size, accum_green_size,
1568 accum_blue_size, accum_alpha_size,
1569 0 );
1570
1571 /* XXX minor hack */
1572 v->mesa_visual.level = level;
1573 return v;
1574 }
1575
1576
1577 PUBLIC
1578 void XMesaDestroyVisual( XMesaVisual v )
1579 {
1580 #ifndef XFree86Server
1581 _mesa_free(v->visinfo);
1582 #endif
1583 _mesa_free(v);
1584 }
1585
1586
1587
1588 /**
1589 * Create a new XMesaContext.
1590 * \param v the XMesaVisual
1591 * \param share_list another XMesaContext with which to share display
1592 * lists or NULL if no sharing is wanted.
1593 * \return an XMesaContext or NULL if error.
1594 */
1595 PUBLIC
1596 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
1597 {
1598 static GLboolean firstTime = GL_TRUE;
1599 XMesaContext c;
1600 GLcontext *mesaCtx;
1601 struct dd_function_table functions;
1602 #if 0
1603 TNLcontext *tnl;
1604 #endif
1605
1606 if (firstTime) {
1607 _glthread_INIT_MUTEX(_xmesa_lock);
1608 firstTime = GL_FALSE;
1609 }
1610
1611 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1612 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
1613 if (!c)
1614 return NULL;
1615
1616 mesaCtx = &(c->mesa);
1617
1618 /* initialize with default driver functions, then plug in XMesa funcs */
1619 _mesa_init_driver_functions(&functions);
1620 xmesa_init_driver_functions(v, &functions);
1621 st_init_driver_functions(&functions);
1622
1623 /* override st's function */
1624 functions.UpdateState = xmesa_update_state;
1625
1626 /*
1627 functions.NewRenderbuffer = xmesa_new_renderbuffer;
1628 */
1629
1630 if (!_mesa_initialize_context(mesaCtx, &v->mesa_visual,
1631 share_list ? &(share_list->mesa) : (GLcontext *) NULL,
1632 &functions, (void *) c)) {
1633 _mesa_free(c);
1634 return NULL;
1635 }
1636
1637 _mesa_enable_sw_extensions(mesaCtx);
1638 _mesa_enable_1_3_extensions(mesaCtx);
1639 _mesa_enable_1_4_extensions(mesaCtx);
1640 _mesa_enable_1_5_extensions(mesaCtx);
1641 _mesa_enable_2_0_extensions(mesaCtx);
1642 _mesa_enable_2_1_extensions(mesaCtx);
1643 #if ENABLE_EXT_texure_compression_s3tc
1644 if (mesaCtx->Mesa_DXTn) {
1645 _mesa_enable_extension(mesaCtx, "GL_EXT_texture_compression_s3tc");
1646 _mesa_enable_extension(mesaCtx, "GL_S3_s3tc");
1647 }
1648 _mesa_enable_extension(mesaCtx, "GL_3DFX_texture_compression_FXT1");
1649 #endif
1650 #if ENABLE_EXT_timer_query
1651 _mesa_enable_extension(mesaCtx, "GL_EXT_timer_query");
1652 #endif
1653
1654 #ifdef XFree86Server
1655 /* If we're running in the X server, do bounds checking to prevent
1656 * segfaults and server crashes!
1657 */
1658 mesaCtx->Const.CheckArrayBounds = GL_TRUE;
1659 #endif
1660
1661 /* finish up xmesa context initializations */
1662 c->swapbytes = CHECK_BYTE_ORDER(v) ? GL_FALSE : GL_TRUE;
1663 c->xm_visual = v;
1664 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
1665 c->display = v->display;
1666 c->pixelformat = v->dithered_pf; /* Dithering is enabled by default */
1667
1668 /* Initialize the software rasterizer and helper modules.
1669 */
1670 if (!_swrast_CreateContext( mesaCtx )
1671 #if 0
1672 || !_vbo_CreateContext( mesaCtx ) ||
1673 !_tnl_CreateContext( mesaCtx ) ||
1674 !_swsetup_CreateContext( mesaCtx )
1675 #endif
1676 ) {
1677 _mesa_free_context_data(&c->mesa);
1678 _mesa_free(c);
1679 return NULL;
1680 }
1681
1682 #if 0
1683 /* tnl setup */
1684 tnl = TNL_CONTEXT(mesaCtx);
1685 tnl->Driver.RunPipeline = _tnl_run_pipeline;
1686 #endif
1687
1688 /* swrast setup */
1689 xmesa_register_swrast_functions( mesaCtx );
1690
1691
1692 st_create_context( mesaCtx,
1693 xmesa_create_softpipe( c ) );
1694
1695 _swsetup_CreateContext( mesaCtx );
1696 _swsetup_Wakeup(mesaCtx);
1697
1698 /* override these functions, as if the xlib driver were derived from
1699 * the softpipe driver.
1700 */
1701 #if 0
1702 mesaCtx->st->pipe->surface_alloc = xmesa_surface_alloc;
1703 #endif
1704 mesaCtx->st->pipe->is_format_supported = xmesa_is_format_supported;
1705 mesaCtx->st->pipe->get_tile_rgba = xmesa_get_tile_rgba;
1706 mesaCtx->st->pipe->put_tile_rgba = xmesa_put_tile_rgba;
1707
1708 mesaCtx->st->haveFramebufferRegions = GL_FALSE;
1709
1710 /* special pipe->clear function */
1711 mesaCtx->st->pipe->clear = xmesa_clear;
1712
1713 return c;
1714 }
1715
1716
1717
1718 PUBLIC
1719 void XMesaDestroyContext( XMesaContext c )
1720 {
1721 GLcontext *mesaCtx = &c->mesa;
1722
1723 #ifdef FX
1724 FXdestroyContext( XMESA_BUFFER(mesaCtx->DrawBuffer) );
1725 #endif
1726
1727 _swsetup_DestroyContext( mesaCtx );
1728 _swrast_DestroyContext( mesaCtx );
1729 #if 0
1730 _tnl_DestroyContext( mesaCtx );
1731 _vbo_DestroyContext( mesaCtx );
1732 #endif
1733 _mesa_free_context_data( mesaCtx );
1734 _mesa_free( c );
1735 }
1736
1737
1738
1739 /**
1740 * Private function for creating an XMesaBuffer which corresponds to an
1741 * X window or pixmap.
1742 * \param v the window's XMesaVisual
1743 * \param w the window we're wrapping
1744 * \return new XMesaBuffer or NULL if error
1745 */
1746 PUBLIC XMesaBuffer
1747 XMesaCreateWindowBuffer(XMesaVisual v, XMesaWindow w)
1748 {
1749 #ifndef XFree86Server
1750 XWindowAttributes attr;
1751 #endif
1752 XMesaBuffer b;
1753 XMesaColormap cmap;
1754 int depth;
1755
1756 assert(v);
1757 assert(w);
1758
1759 /* Check that window depth matches visual depth */
1760 #ifdef XFree86Server
1761 depth = ((XMesaDrawable)w)->depth;
1762 #else
1763 XGetWindowAttributes( v->display, w, &attr );
1764 depth = attr.depth;
1765 #endif
1766 if (GET_VISUAL_DEPTH(v) != depth) {
1767 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1768 GET_VISUAL_DEPTH(v), depth);
1769 return NULL;
1770 }
1771
1772 /* Find colormap */
1773 #ifdef XFree86Server
1774 cmap = (ColormapPtr)LookupIDByType(wColormap(w), RT_COLORMAP);
1775 #else
1776 if (attr.colormap) {
1777 cmap = attr.colormap;
1778 }
1779 else {
1780 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
1781 /* this is weird, a window w/out a colormap!? */
1782 /* OK, let's just allocate a new one and hope for the best */
1783 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
1784 }
1785 #endif
1786
1787 b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
1788 if (!b)
1789 return NULL;
1790
1791 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
1792 (XMesaDrawable) w, cmap )) {
1793 xmesa_free_buffer(b);
1794 return NULL;
1795 }
1796
1797 return b;
1798 }
1799
1800
1801
1802 /**
1803 * Create a new XMesaBuffer from an X pixmap.
1804 *
1805 * \param v the XMesaVisual
1806 * \param p the pixmap
1807 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1808 * \c GLX_DIRECT_COLOR visual for the pixmap
1809 * \returns new XMesaBuffer or NULL if error
1810 */
1811 PUBLIC XMesaBuffer
1812 XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
1813 {
1814 XMesaBuffer b;
1815
1816 assert(v);
1817
1818 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1819 if (!b)
1820 return NULL;
1821
1822 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1823 (XMesaDrawable) p, cmap)) {
1824 xmesa_free_buffer(b);
1825 return NULL;
1826 }
1827
1828 return b;
1829 }
1830
1831
1832 /**
1833 * For GLX_EXT_texture_from_pixmap
1834 */
1835 XMesaBuffer
1836 XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
1837 XMesaColormap cmap,
1838 int format, int target, int mipmap)
1839 {
1840 GET_CURRENT_CONTEXT(ctx);
1841 XMesaBuffer b;
1842 GLuint width, height;
1843
1844 assert(v);
1845
1846 b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
1847 if (!b)
1848 return NULL;
1849
1850 /* get pixmap size, update framebuffer/renderbuffer dims */
1851 xmesa_get_window_size(v->display, b, &width, &height);
1852 _mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
1853
1854 if (target == 0) {
1855 /* examine dims */
1856 if (ctx->Extensions.ARB_texture_non_power_of_two) {
1857 target = GLX_TEXTURE_2D_EXT;
1858 }
1859 else if ( _mesa_bitcount(width) == 1
1860 && _mesa_bitcount(height) == 1) {
1861 /* power of two size */
1862 if (height == 1) {
1863 target = GLX_TEXTURE_1D_EXT;
1864 }
1865 else {
1866 target = GLX_TEXTURE_2D_EXT;
1867 }
1868 }
1869 else if (ctx->Extensions.NV_texture_rectangle) {
1870 target = GLX_TEXTURE_RECTANGLE_EXT;
1871 }
1872 else {
1873 /* non power of two textures not supported */
1874 XMesaDestroyBuffer(b);
1875 return 0;
1876 }
1877 }
1878
1879 b->TextureTarget = target;
1880 b->TextureFormat = format;
1881 b->TextureMipmap = mipmap;
1882
1883 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1884 (XMesaDrawable) p, cmap)) {
1885 xmesa_free_buffer(b);
1886 return NULL;
1887 }
1888
1889 return b;
1890 }
1891
1892
1893
1894 XMesaBuffer
1895 XMesaCreatePBuffer(XMesaVisual v, XMesaColormap cmap,
1896 unsigned int width, unsigned int height)
1897 {
1898 #ifndef XFree86Server
1899 XMesaWindow root;
1900 XMesaDrawable drawable; /* X Pixmap Drawable */
1901 XMesaBuffer b;
1902
1903 /* allocate pixmap for front buffer */
1904 root = RootWindow( v->display, v->visinfo->screen );
1905 drawable = XCreatePixmap(v->display, root, width, height,
1906 v->visinfo->depth);
1907 if (!drawable)
1908 return NULL;
1909
1910 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1911 if (!b)
1912 return NULL;
1913
1914 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1915 drawable, cmap)) {
1916 xmesa_free_buffer(b);
1917 return NULL;
1918 }
1919
1920 return b;
1921 #else
1922 return 0;
1923 #endif
1924 }
1925
1926
1927
1928 /*
1929 * Deallocate an XMesaBuffer structure and all related info.
1930 */
1931 PUBLIC void
1932 XMesaDestroyBuffer(XMesaBuffer b)
1933 {
1934 xmesa_free_buffer(b);
1935 }
1936
1937
1938 /**
1939 * Query the current window size and update the corresponding GLframebuffer
1940 * and all attached renderbuffers.
1941 * Called when:
1942 * 1. the first time a buffer is bound to a context.
1943 * 2. from glViewport to poll for window size changes
1944 * 3. from the XMesaResizeBuffers() API function.
1945 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1946 * when resizing a buffer when no rendering context is bound.
1947 */
1948 void
1949 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1950 {
1951 GLuint width, height;
1952 xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
1953 if (drawBuffer->mesa_buffer.Width != width ||
1954 drawBuffer->mesa_buffer.Height != height) {
1955 GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
1956 _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
1957 }
1958 drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
1959 }
1960
1961
1962 /*
1963 * Bind buffer b to context c and make c the current rendering context.
1964 */
1965 GLboolean XMesaMakeCurrent( XMesaContext c, XMesaBuffer b )
1966 {
1967 return XMesaMakeCurrent2( c, b, b );
1968 }
1969
1970
1971 /*
1972 * Bind buffer b to context c and make c the current rendering context.
1973 */
1974 PUBLIC
1975 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1976 XMesaBuffer readBuffer )
1977 {
1978 if (c) {
1979 if (!drawBuffer || !readBuffer)
1980 return GL_FALSE; /* must specify buffers! */
1981
1982 if (&(c->mesa) == _mesa_get_current_context()
1983 && c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
1984 && c->mesa.ReadBuffer == &readBuffer->mesa_buffer
1985 && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
1986 /* same context and buffer, do nothing */
1987 return GL_TRUE;
1988 }
1989
1990 c->xm_buffer = drawBuffer;
1991
1992 #ifdef FX
1993 if (FXmakeCurrent( drawBuffer ))
1994 return GL_TRUE;
1995 #endif
1996
1997 /* Call this periodically to detect when the user has begun using
1998 * GL rendering from multiple threads.
1999 */
2000 _glapi_check_multithread();
2001
2002 xmesa_check_and_update_buffer_size(c, drawBuffer);
2003 if (readBuffer != drawBuffer)
2004 xmesa_check_and_update_buffer_size(c, readBuffer);
2005
2006 _mesa_make_current(&(c->mesa),
2007 &drawBuffer->mesa_buffer,
2008 &readBuffer->mesa_buffer);
2009
2010 if (c->xm_visual->mesa_visual.rgbMode) {
2011 /*
2012 * Must recompute and set these pixel values because colormap
2013 * can be different for different windows.
2014 */
2015 c->clearpixel = xmesa_color_to_pixel( &c->mesa,
2016 c->clearcolor[0],
2017 c->clearcolor[1],
2018 c->clearcolor[2],
2019 c->clearcolor[3],
2020 c->xm_visual->undithered_pf);
2021 XMesaSetForeground(c->display, drawBuffer->cleargc, c->clearpixel);
2022 }
2023
2024 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
2025 drawBuffer->wasCurrent = GL_TRUE;
2026 }
2027 else {
2028 /* Detach */
2029 _mesa_make_current( NULL, NULL, NULL );
2030 }
2031 return GL_TRUE;
2032 }
2033
2034
2035 /*
2036 * Unbind the context c from its buffer.
2037 */
2038 GLboolean XMesaUnbindContext( XMesaContext c )
2039 {
2040 /* A no-op for XFree86 integration purposes */
2041 return GL_TRUE;
2042 }
2043
2044
2045 XMesaContext XMesaGetCurrentContext( void )
2046 {
2047 GET_CURRENT_CONTEXT(ctx);
2048 if (ctx) {
2049 XMesaContext xmesa = XMESA_CONTEXT(ctx);
2050 return xmesa;
2051 }
2052 else {
2053 return 0;
2054 }
2055 }
2056
2057
2058 XMesaBuffer XMesaGetCurrentBuffer( void )
2059 {
2060 GET_CURRENT_CONTEXT(ctx);
2061 if (ctx) {
2062 XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
2063 return xmbuf;
2064 }
2065 else {
2066 return 0;
2067 }
2068 }
2069
2070
2071 /* New in Mesa 3.1 */
2072 XMesaBuffer XMesaGetCurrentReadBuffer( void )
2073 {
2074 GET_CURRENT_CONTEXT(ctx);
2075 if (ctx) {
2076 return XMESA_BUFFER(ctx->ReadBuffer);
2077 }
2078 else {
2079 return 0;
2080 }
2081 }
2082
2083
2084 #ifdef XFree86Server
2085 PUBLIC
2086 GLboolean XMesaForceCurrent(XMesaContext c)
2087 {
2088 if (c) {
2089 _glapi_set_dispatch(c->mesa.CurrentDispatch);
2090
2091 if (&(c->mesa) != _mesa_get_current_context()) {
2092 _mesa_make_current(&c->mesa, c->mesa.DrawBuffer, c->mesa.ReadBuffer);
2093 }
2094 }
2095 else {
2096 _mesa_make_current(NULL, NULL, NULL);
2097 }
2098 return GL_TRUE;
2099 }
2100
2101
2102 PUBLIC
2103 GLboolean XMesaLoseCurrent(XMesaContext c)
2104 {
2105 (void) c;
2106 _mesa_make_current(NULL, NULL, NULL);
2107 return GL_TRUE;
2108 }
2109
2110
2111 PUBLIC
2112 GLboolean XMesaCopyContext( XMesaContext xm_src, XMesaContext xm_dst, GLuint mask )
2113 {
2114 _mesa_copy_context(&xm_src->mesa, &xm_dst->mesa, mask);
2115 return GL_TRUE;
2116 }
2117 #endif /* XFree86Server */
2118
2119
2120 #ifndef FX
2121 GLboolean XMesaSetFXmode( GLint mode )
2122 {
2123 (void) mode;
2124 return GL_FALSE;
2125 }
2126 #endif
2127
2128
2129
2130 /*
2131 * Copy the back buffer to the front buffer. If there's no back buffer
2132 * this is a no-op.
2133 */
2134 PUBLIC
2135 void XMesaSwapBuffers( XMesaBuffer b )
2136 {
2137 GET_CURRENT_CONTEXT(ctx);
2138
2139 if (!b->backxrb) {
2140 /* single buffered */
2141 return;
2142 }
2143
2144 /* If we're swapping the buffer associated with the current context
2145 * we have to flush any pending rendering commands first.
2146 */
2147 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2148 _mesa_notifySwapBuffers(ctx);
2149
2150 if (b->db_mode) {
2151 #ifdef FX
2152 if (FXswapBuffers(b))
2153 return;
2154 #endif
2155 if (b->backxrb->ximage) {
2156 /* Copy Ximage (back buf) from client memory to server window */
2157 #if defined(USE_XSHM) && !defined(XFree86Server)
2158 if (b->shm) {
2159 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2160 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2161 b->swapgc,
2162 b->backxrb->ximage, 0, 0,
2163 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2164 False );
2165 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2166 }
2167 else
2168 #endif
2169 {
2170 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2171 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2172 b->swapgc,
2173 b->backxrb->ximage, 0, 0,
2174 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height );
2175 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2176 }
2177 }
2178 else if (b->backxrb->pixmap) {
2179 /* Copy pixmap (back buf) to window (front buf) on server */
2180 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2181 XMesaCopyArea( b->xm_visual->display,
2182 b->backxrb->pixmap, /* source drawable */
2183 b->frontxrb->drawable, /* dest. drawable */
2184 b->swapgc,
2185 0, 0, b->mesa_buffer.Width, b->mesa_buffer.Height,
2186 0, 0 /* dest region */
2187 );
2188 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2189 }
2190
2191 if (b->swAlpha)
2192 _mesa_copy_soft_alpha_renderbuffers(ctx, &b->mesa_buffer);
2193 }
2194 #if !defined(XFree86Server)
2195 XSync( b->xm_visual->display, False );
2196 #endif
2197 }
2198
2199
2200
2201 /*
2202 * Copy sub-region of back buffer to front buffer
2203 */
2204 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
2205 {
2206 GET_CURRENT_CONTEXT(ctx);
2207
2208 /* If we're swapping the buffer associated with the current context
2209 * we have to flush any pending rendering commands first.
2210 */
2211 if (ctx && ctx->DrawBuffer == &(b->mesa_buffer))
2212 _mesa_notifySwapBuffers(ctx);
2213
2214 if (!b->backxrb) {
2215 /* single buffered */
2216 return;
2217 }
2218
2219 if (b->db_mode) {
2220 int yTop = b->mesa_buffer.Height - y - height;
2221 #ifdef FX
2222 if (FXswapBuffers(b))
2223 return;
2224 #endif
2225 if (b->backxrb->ximage) {
2226 /* Copy Ximage from host's memory to server's window */
2227 #if defined(USE_XSHM) && !defined(XFree86Server)
2228 if (b->shm) {
2229 /* XXX assuming width and height aren't too large! */
2230 XShmPutImage( b->xm_visual->display, b->frontxrb->drawable,
2231 b->swapgc,
2232 b->backxrb->ximage, x, yTop,
2233 x, yTop, width, height, False );
2234 /* wait for finished event??? */
2235 }
2236 else
2237 #endif
2238 {
2239 /* XXX assuming width and height aren't too large! */
2240 XMesaPutImage( b->xm_visual->display, b->frontxrb->drawable,
2241 b->swapgc,
2242 b->backxrb->ximage, x, yTop,
2243 x, yTop, width, height );
2244 }
2245 }
2246 else {
2247 /* Copy pixmap to window on server */
2248 XMesaCopyArea( b->xm_visual->display,
2249 b->backxrb->pixmap, /* source drawable */
2250 b->frontxrb->drawable, /* dest. drawable */
2251 b->swapgc,
2252 x, yTop, width, height, /* source region */
2253 x, yTop /* dest region */
2254 );
2255 }
2256 }
2257 }
2258
2259
2260 /*
2261 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2262 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2263 * back buffer directly.
2264 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2265 * ximage - pointer to back buffer's XImage, or NULL
2266 * Return: GL_TRUE = context is double buffered
2267 * GL_FALSE = context is single buffered
2268 */
2269 #ifndef XFree86Server
2270 GLboolean XMesaGetBackBuffer( XMesaBuffer b,
2271 XMesaPixmap *pixmap,
2272 XMesaImage **ximage )
2273 {
2274 if (b->db_mode) {
2275 if (pixmap)
2276 *pixmap = b->backxrb->pixmap;
2277 if (ximage)
2278 *ximage = b->backxrb->ximage;
2279 return GL_TRUE;
2280 }
2281 else {
2282 *pixmap = 0;
2283 *ximage = NULL;
2284 return GL_FALSE;
2285 }
2286 }
2287 #endif /* XFree86Server */
2288
2289
2290 /*
2291 * Return the depth buffer associated with an XMesaBuffer.
2292 * Input: b - the XMesa buffer handle
2293 * Output: width, height - size of buffer in pixels
2294 * bytesPerValue - bytes per depth value (2 or 4)
2295 * buffer - pointer to depth buffer values
2296 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2297 */
2298 GLboolean XMesaGetDepthBuffer( XMesaBuffer b, GLint *width, GLint *height,
2299 GLint *bytesPerValue, void **buffer )
2300 {
2301 struct gl_renderbuffer *rb
2302 = b->mesa_buffer.Attachment[BUFFER_DEPTH].Renderbuffer;
2303 if (!rb || !rb->Data) {
2304 *width = 0;
2305 *height = 0;
2306 *bytesPerValue = 0;
2307 *buffer = 0;
2308 return GL_FALSE;
2309 }
2310 else {
2311 *width = b->mesa_buffer.Width;
2312 *height = b->mesa_buffer.Height;
2313 *bytesPerValue = b->mesa_buffer.Visual.depthBits <= 16
2314 ? sizeof(GLushort) : sizeof(GLuint);
2315 *buffer = rb->Data;
2316 return GL_TRUE;
2317 }
2318 }
2319
2320
2321 void XMesaFlush( XMesaContext c )
2322 {
2323 if (c && c->xm_visual) {
2324 #ifdef XFree86Server
2325 /* NOT_NEEDED */
2326 #else
2327 XSync( c->xm_visual->display, False );
2328 #endif
2329 }
2330 }
2331
2332
2333
2334 const char *XMesaGetString( XMesaContext c, int name )
2335 {
2336 (void) c;
2337 if (name==XMESA_VERSION) {
2338 return "5.0";
2339 }
2340 else if (name==XMESA_EXTENSIONS) {
2341 return "";
2342 }
2343 else {
2344 return NULL;
2345 }
2346 }
2347
2348
2349
2350 XMesaBuffer XMesaFindBuffer( XMesaDisplay *dpy, XMesaDrawable d )
2351 {
2352 XMesaBuffer b;
2353 for (b=XMesaBufferList; b; b=b->Next) {
2354 if (b->frontxrb->drawable == d && b->display == dpy) {
2355 return b;
2356 }
2357 }
2358 return NULL;
2359 }
2360
2361
2362 /**
2363 * Free/destroy all XMesaBuffers associated with given display.
2364 */
2365 void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy)
2366 {
2367 XMesaBuffer b, next;
2368 for (b = XMesaBufferList; b; b = next) {
2369 next = b->Next;
2370 if (b->display == dpy) {
2371 xmesa_free_buffer(b);
2372 }
2373 }
2374 }
2375
2376
2377 /*
2378 * Look for XMesaBuffers whose X window has been destroyed.
2379 * Deallocate any such XMesaBuffers.
2380 */
2381 void XMesaGarbageCollect( void )
2382 {
2383 XMesaBuffer b, next;
2384 for (b=XMesaBufferList; b; b=next) {
2385 next = b->Next;
2386 if (b->display && b->frontxrb->drawable && b->type == WINDOW) {
2387 #ifdef XFree86Server
2388 /* NOT_NEEDED */
2389 #else
2390 XSync(b->display, False);
2391 if (!window_exists( b->display, b->frontxrb->drawable )) {
2392 /* found a dead window, free the ancillary info */
2393 XMesaDestroyBuffer( b );
2394 }
2395 #endif
2396 }
2397 }
2398 }
2399
2400
2401 unsigned long XMesaDitherColor( XMesaContext xmesa, GLint x, GLint y,
2402 GLfloat red, GLfloat green,
2403 GLfloat blue, GLfloat alpha )
2404 {
2405 GLcontext *ctx = &xmesa->mesa;
2406 GLint r = (GLint) (red * 255.0F);
2407 GLint g = (GLint) (green * 255.0F);
2408 GLint b = (GLint) (blue * 255.0F);
2409 GLint a = (GLint) (alpha * 255.0F);
2410
2411 switch (xmesa->pixelformat) {
2412 case PF_Index:
2413 return 0;
2414 case PF_Truecolor:
2415 {
2416 unsigned long p;
2417 PACK_TRUECOLOR( p, r, g, b );
2418 return p;
2419 }
2420 case PF_8A8B8G8R:
2421 return PACK_8A8B8G8R( r, g, b, a );
2422 case PF_8A8R8G8B:
2423 return PACK_8A8R8G8B( r, g, b, a );
2424 case PF_8R8G8B:
2425 return PACK_8R8G8B( r, g, b );
2426 case PF_5R6G5B:
2427 return PACK_5R6G5B( r, g, b );
2428 case PF_Dither:
2429 {
2430 DITHER_SETUP;
2431 return DITHER( x, y, r, g, b );
2432 }
2433 case PF_1Bit:
2434 /* 382 = (3*255)/2 */
2435 return ((r+g+b) > 382) ^ xmesa->xm_visual->bitFlip;
2436 case PF_HPCR:
2437 return DITHER_HPCR(x, y, r, g, b);
2438 case PF_Lookup:
2439 {
2440 LOOKUP_SETUP;
2441 return LOOKUP( r, g, b );
2442 }
2443 case PF_Grayscale:
2444 return GRAY_RGB( r, g, b );
2445 case PF_Dither_5R6G5B:
2446 /* fall through */
2447 case PF_Dither_True:
2448 {
2449 unsigned long p;
2450 PACK_TRUEDITHER(p, x, y, r, g, b);
2451 return p;
2452 }
2453 default:
2454 _mesa_problem(NULL, "Bad pixel format in XMesaDitherColor");
2455 }
2456 return 0;
2457 }
2458
2459
2460 /*
2461 * This is typically called when the window size changes and we need
2462 * to reallocate the buffer's back/depth/stencil/accum buffers.
2463 */
2464 PUBLIC void
2465 XMesaResizeBuffers( XMesaBuffer b )
2466 {
2467 GET_CURRENT_CONTEXT(ctx);
2468 XMesaContext xmctx = XMESA_CONTEXT(ctx);
2469 if (!xmctx)
2470 return;
2471 xmesa_check_and_update_buffer_size(xmctx, b);
2472 }
2473
2474
2475 static GLint
2476 xbuffer_to_renderbuffer(int buffer)
2477 {
2478 assert(MAX_AUX_BUFFERS <= 4);
2479
2480 switch (buffer) {
2481 case GLX_FRONT_LEFT_EXT:
2482 return BUFFER_FRONT_LEFT;
2483 case GLX_FRONT_RIGHT_EXT:
2484 return BUFFER_FRONT_RIGHT;
2485 case GLX_BACK_LEFT_EXT:
2486 return BUFFER_BACK_LEFT;
2487 case GLX_BACK_RIGHT_EXT:
2488 return BUFFER_BACK_RIGHT;
2489 case GLX_AUX0_EXT:
2490 return BUFFER_AUX0;
2491 case GLX_AUX1_EXT:
2492 return BUFFER_AUX1;
2493 case GLX_AUX2_EXT:
2494 return BUFFER_AUX2;
2495 case GLX_AUX3_EXT:
2496 return BUFFER_AUX3;
2497 case GLX_AUX4_EXT:
2498 case GLX_AUX5_EXT:
2499 case GLX_AUX6_EXT:
2500 case GLX_AUX7_EXT:
2501 case GLX_AUX8_EXT:
2502 case GLX_AUX9_EXT:
2503 default:
2504 /* BadValue error */
2505 return -1;
2506 }
2507 }
2508
2509
2510 PUBLIC void
2511 XMesaBindTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer,
2512 const int *attrib_list)
2513 {
2514 #if 0
2515 GET_CURRENT_CONTEXT(ctx);
2516 const GLuint unit = ctx->Texture.CurrentUnit;
2517 struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
2518 struct gl_texture_object *texObj;
2519 #endif
2520 struct gl_renderbuffer *rb;
2521 struct xmesa_renderbuffer *xrb;
2522 GLint b;
2523 XMesaImage *img = NULL;
2524 GLboolean freeImg = GL_FALSE;
2525
2526 b = xbuffer_to_renderbuffer(buffer);
2527 if (b < 0)
2528 return;
2529
2530 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_NONE_EXT)
2531 return; /* BadMatch error */
2532
2533 rb = drawable->mesa_buffer.Attachment[b].Renderbuffer;
2534 if (!rb) {
2535 /* invalid buffer */
2536 return;
2537 }
2538 xrb = xmesa_renderbuffer(rb);
2539
2540 #if 0
2541 switch (drawable->TextureTarget) {
2542 case GLX_TEXTURE_1D_EXT:
2543 texObj = texUnit->Current1D;
2544 break;
2545 case GLX_TEXTURE_2D_EXT:
2546 texObj = texUnit->Current2D;
2547 break;
2548 case GLX_TEXTURE_RECTANGLE_EXT:
2549 texObj = texUnit->CurrentRect;
2550 break;
2551 default:
2552 return; /* BadMatch error */
2553 }
2554 #endif
2555
2556 /*
2557 * The following is a quick and simple way to implement
2558 * BindTexImage. The better way is to write some new FetchTexel()
2559 * functions which would extract texels from XImages. We'd still
2560 * need to use GetImage when texturing from a Pixmap (front buffer)
2561 * but texturing from a back buffer (XImage) would avoid an image
2562 * copy.
2563 */
2564
2565 /* get XImage */
2566 if (xrb->pixmap) {
2567 img = XMesaGetImage(dpy, xrb->pixmap, 0, 0, rb->Width, rb->Height, ~0L,
2568 ZPixmap);
2569 freeImg = GL_TRUE;
2570 }
2571 else if (xrb->ximage) {
2572 img = xrb->ximage;
2573 }
2574
2575 /* store the XImage as a new texture image */
2576 if (img) {
2577 GLenum format, type, intFormat;
2578 if (img->bits_per_pixel == 32) {
2579 format = GL_BGRA;
2580 type = GL_UNSIGNED_BYTE;
2581 intFormat = GL_RGBA;
2582 }
2583 else if (img->bits_per_pixel == 24) {
2584 format = GL_BGR;
2585 type = GL_UNSIGNED_BYTE;
2586 intFormat = GL_RGB;
2587 }
2588 else if (img->bits_per_pixel == 16) {
2589 format = GL_BGR;
2590 type = GL_UNSIGNED_SHORT_5_6_5;
2591 intFormat = GL_RGB;
2592 }
2593 else {
2594 _mesa_problem(NULL, "Unexpected XImage format in XMesaBindTexImage");
2595 return;
2596 }
2597 if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGBA_EXT) {
2598 intFormat = GL_RGBA;
2599 }
2600 else if (drawable->TextureFormat == GLX_TEXTURE_FORMAT_RGB_EXT) {
2601 intFormat = GL_RGB;
2602 }
2603
2604 _mesa_TexImage2D(GL_TEXTURE_2D, 0, intFormat, rb->Width, rb->Height, 0,
2605 format, type, img->data);
2606
2607 if (freeImg) {
2608 XMesaDestroyImage(img);
2609 }
2610 }
2611 }
2612
2613
2614
2615 PUBLIC void
2616 XMesaReleaseTexImage(XMesaDisplay *dpy, XMesaBuffer drawable, int buffer)
2617 {
2618 const GLint b = xbuffer_to_renderbuffer(buffer);
2619 if (b < 0)
2620 return;
2621
2622 /* no-op for now */
2623 }
2624