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