2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
28 * All the XMesa* API functions.
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.
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.
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.
65 #include "glxheader.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"
79 #include "tnl/t_context.h"
80 #include "tnl/t_pipeline.h"
81 #include "drivers/common/driverfuncs.h"
82 #include "drivers/common/meta.h"
85 * Global X driver lock
87 _glthread_Mutex _xmesa_lock
;
92 * Lookup tables for HPCR pixel format:
94 static short hpcr_rgbTbl
[3][256] = {
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
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
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
153 /**********************************************************************/
154 /***** X Utility Functions *****/
155 /**********************************************************************/
159 * Return the host's byte order as LSBFirst or MSBFirst ala X.
161 #ifndef XFree86Server
162 static int host_byte_order( void )
165 char *cptr
= (char *) &i
;
166 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
172 * Check if the X Shared Memory extension is available.
173 * Return: 0 = not available
174 * 1 = shared XImage support available
175 * 2 = shared Pixmap support available also
177 static int check_for_xshm( XMesaDisplay
*display
)
179 #if defined(USE_XSHM) && !defined(XFree86Server)
180 int major
, minor
, ignore
;
183 if (XQueryExtension( display
, "MIT-SHM", &ignore
, &ignore
, &ignore
)) {
184 if (XShmQueryVersion( display
, &major
, &minor
, &pixmaps
)==True
) {
185 return (pixmaps
==True
) ? 2 : 1;
195 /* No XSHM support */
202 * Apply gamma correction to an intensity value in [0..max]. Return the
203 * new intensity value.
206 gamma_adjust( GLfloat gamma
, GLint value
, GLint max
)
212 double x
= (double) value
/ (double) max
;
213 return IROUND_POS((GLfloat
) max
* _mesa_pow(x
, 1.0F
/gamma
));
220 * Return the true number of bits per pixel for XImages.
221 * For example, if we request a 24-bit deep visual we may actually need/get
222 * 32bpp XImages. This function returns the appropriate bpp.
223 * Input: dpy - the X display
224 * visinfo - desribes the visual to be used for XImages
225 * Return: true number of bits per pixel for XImages
228 bits_per_pixel( XMesaVisual xmv
)
231 const int depth
= xmv
->nplanes
;
234 for (i
= 0; i
< screenInfo
.numPixmapFormats
; i
++) {
235 if (screenInfo
.formats
[i
].depth
== depth
)
236 return screenInfo
.formats
[i
].bitsPerPixel
;
238 return depth
; /* should never get here, but this should be safe */
240 XMesaDisplay
*dpy
= xmv
->display
;
241 XMesaVisualInfo visinfo
= xmv
->visinfo
;
244 /* Create a temporary XImage */
245 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
246 ZPixmap
, 0, /*format, offset*/
247 (char*) MALLOC(8), /*data*/
248 1, 1, /*width, height*/
253 /* grab the bits/pixel value */
254 bitsPerPixel
= img
->bits_per_pixel
;
255 /* free the XImage */
256 _mesa_free( img
->data
);
258 XMesaDestroyImage( img
);
266 * Determine if a given X window ID is valid (window exists).
267 * Do this by calling XGetWindowAttributes() for the window and
268 * checking if we catch an X error.
269 * Input: dpy - the display
270 * win - the window to check for existance
271 * Return: GL_TRUE - window exists
272 * GL_FALSE - window doesn't exist
274 #ifndef XFree86Server
275 static GLboolean WindowExistsFlag
;
277 static int window_exists_err_handler( XMesaDisplay
* dpy
, XErrorEvent
* xerr
)
280 if (xerr
->error_code
== BadWindow
) {
281 WindowExistsFlag
= GL_FALSE
;
286 static GLboolean
window_exists( XMesaDisplay
*dpy
, Window win
)
288 XWindowAttributes wa
;
289 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
290 WindowExistsFlag
= GL_TRUE
;
291 old_handler
= XSetErrorHandler(window_exists_err_handler
);
292 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
293 XSetErrorHandler(old_handler
);
294 return WindowExistsFlag
;
298 get_drawable_size( XMesaDisplay
*dpy
, Drawable d
, GLuint
*width
, GLuint
*height
)
303 unsigned int w
, h
, bw
, depth
;
304 stat
= XGetGeometry(dpy
, d
, &root
, &xpos
, &ypos
, &w
, &h
, &bw
, &depth
);
313 * Return the size of the window (or pixmap) that corresponds to the
315 * \param width returns width in pixels
316 * \param height returns height in pixels
319 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
320 GLuint
*width
, GLuint
*height
)
323 *width
= MIN2(b
->frontxrb
->drawable
->width
, MAX_WIDTH
);
324 *height
= MIN2(b
->frontxrb
->drawable
->height
, MAX_HEIGHT
);
328 _glthread_LOCK_MUTEX(_xmesa_lock
);
329 XSync(b
->xm_visual
->display
, 0); /* added for Chromium */
330 stat
= get_drawable_size(dpy
, b
->frontxrb
->pixmap
, width
, height
);
331 _glthread_UNLOCK_MUTEX(_xmesa_lock
);
334 /* probably querying a window that's recently been destroyed */
335 _mesa_warning(NULL
, "XGetGeometry failed!\n");
336 *width
= *height
= 1;
343 /**********************************************************************/
344 /***** Linked list of XMesaBuffers *****/
345 /**********************************************************************/
347 XMesaBuffer XMesaBufferList
= NULL
;
351 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
352 * Note that XMesaBuffer is derived from GLframebuffer.
353 * The new XMesaBuffer will not have any size (Width=Height=0).
355 * \param d the corresponding X drawable (window or pixmap)
356 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
357 * \param vis the buffer's visual
358 * \param cmap the window's colormap, if known.
359 * \return new XMesaBuffer or NULL if any problem
362 create_xmesa_buffer(XMesaDrawable d
, BufferType type
,
363 XMesaVisual vis
, XMesaColormap cmap
)
367 ASSERT(type
== WINDOW
|| type
== PIXMAP
|| type
== PBUFFER
);
369 b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
373 b
->display
= vis
->display
;
378 _mesa_initialize_framebuffer(&b
->mesa_buffer
, &vis
->mesa_visual
);
379 b
->mesa_buffer
.Delete
= xmesa_delete_framebuffer
;
384 b
->frontxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_FALSE
);
389 b
->frontxrb
->Parent
= b
;
390 b
->frontxrb
->drawable
= d
;
391 b
->frontxrb
->pixmap
= (XMesaPixmap
) d
;
392 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_FRONT_LEFT
,
398 if (vis
->mesa_visual
.doubleBufferMode
) {
399 b
->backxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_TRUE
);
401 /* XXX free front xrb too */
405 b
->backxrb
->Parent
= b
;
406 /* determine back buffer implementation */
407 b
->db_mode
= vis
->ximage_flag
? BACK_XIMAGE
: BACK_PIXMAP
;
409 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_BACK_LEFT
,
414 * Software alpha planes
416 if (vis
->mesa_visual
.alphaBits
> 0
417 && vis
->undithered_pf
!= PF_8A8B8G8R
418 && vis
->undithered_pf
!= PF_8A8R8G8B
) {
419 /* Visual has alpha, but pixel format doesn't support it.
420 * We'll use an alpha renderbuffer wrapper.
422 b
->swAlpha
= GL_TRUE
;
425 b
->swAlpha
= GL_FALSE
;
429 * Other renderbuffer (depth, stencil, etc)
431 _mesa_add_soft_renderbuffers(&b
->mesa_buffer
,
432 GL_FALSE
, /* color */
433 vis
->mesa_visual
.haveDepthBuffer
,
434 vis
->mesa_visual
.haveStencilBuffer
,
435 vis
->mesa_visual
.haveAccumBuffer
,
437 vis
->mesa_visual
.numAuxBuffers
> 0 );
439 /* GLX_EXT_texture_from_pixmap */
440 b
->TextureTarget
= 0;
441 b
->TextureFormat
= GLX_TEXTURE_FORMAT_NONE_EXT
;
442 b
->TextureMipmap
= 0;
444 /* insert buffer into linked list */
445 b
->Next
= XMesaBufferList
;
453 * Find an XMesaBuffer by matching X display and colormap but NOT matching
454 * the notThis buffer.
457 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
)
460 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
461 if (b
->display
==dpy
&& b
->cmap
==cmap
&& b
!=notThis
) {
470 * Remove buffer from linked list, delete if no longer referenced.
473 xmesa_free_buffer(XMesaBuffer buffer
)
475 XMesaBuffer prev
= NULL
, b
;
477 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
479 struct gl_framebuffer
*fb
= &buffer
->mesa_buffer
;
481 /* unlink buffer from list */
483 prev
->Next
= buffer
->Next
;
485 XMesaBufferList
= buffer
->Next
;
487 /* mark as delete pending */
488 fb
->DeletePending
= GL_TRUE
;
490 /* Since the X window for the XMesaBuffer is going away, we don't
491 * want to dereference this pointer in the future.
493 b
->frontxrb
->drawable
= 0;
495 /* Unreference. If count = zero we'll really delete the buffer */
496 _mesa_reference_framebuffer(&fb
, NULL
);
500 /* continue search */
503 /* buffer not found in XMesaBufferList */
504 _mesa_problem(NULL
,"xmesa_free_buffer() - buffer not found\n");
509 * Copy X color table stuff from one XMesaBuffer to another.
512 copy_colortable_info(XMesaBuffer dst
, const XMesaBuffer src
)
514 MEMCPY(dst
->color_table
, src
->color_table
, sizeof(src
->color_table
));
515 MEMCPY(dst
->pixel_to_r
, src
->pixel_to_r
, sizeof(src
->pixel_to_r
));
516 MEMCPY(dst
->pixel_to_g
, src
->pixel_to_g
, sizeof(src
->pixel_to_g
));
517 MEMCPY(dst
->pixel_to_b
, src
->pixel_to_b
, sizeof(src
->pixel_to_b
));
518 dst
->num_alloced
= src
->num_alloced
;
519 MEMCPY(dst
->alloced_colors
, src
->alloced_colors
,
520 sizeof(src
->alloced_colors
));
525 /**********************************************************************/
526 /***** Misc Private Functions *****/
527 /**********************************************************************/
531 * A replacement for XAllocColor. This function should never
532 * fail to allocate a color. When XAllocColor fails, we return
533 * the nearest matching color. If we have to allocate many colors
534 * this function isn't too efficient; the XQueryColors() could be
536 * Written by Michael Pichler, Brian Paul, Mark Kilgard
537 * Input: dpy - X display
539 * cmapSize - size of colormap
540 * In/Out: color - the XColor struct
541 * Output: exact - 1=exact color match, 0=closest match
542 * alloced - 1=XAlloc worked, 0=XAlloc failed
545 noFaultXAllocColor( int client
,
550 int *exact
, int *alloced
)
556 /* we'll try to cache ctable for better remote display performance */
557 static Display
*prevDisplay
= NULL
;
558 static XMesaColormap prevCmap
= 0;
559 static int prevCmapSize
= 0;
560 static XMesaColor
*ctable
= NULL
;
564 double mindist
; /* 3*2^16^2 exceeds long int precision. */
568 /* First try just using XAllocColor. */
571 &color
->red
, &color
->green
, &color
->blue
,
575 if (XAllocColor(dpy
, cmap
, color
))
583 /* Alloc failed, search for closest match */
585 /* Retrieve color table entries. */
586 /* XXX alloca candidate. */
588 ppixIn
= (Pixel
*) MALLOC(cmapSize
* sizeof(Pixel
));
589 ctable
= (xrgb
*) MALLOC(cmapSize
* sizeof(xrgb
));
590 for (i
= 0; i
< cmapSize
; i
++) {
593 QueryColors(cmap
, cmapSize
, ppixIn
, ctable
);
595 if (prevDisplay
!= dpy
|| prevCmap
!= cmap
596 || prevCmapSize
!= cmapSize
|| !ctable
) {
597 /* free previously cached color table */
600 /* Get the color table from X */
601 ctable
= (XMesaColor
*) MALLOC(cmapSize
* sizeof(XMesaColor
));
603 for (i
= 0; i
< cmapSize
; i
++) {
606 XQueryColors(dpy
, cmap
, ctable
, cmapSize
);
609 prevCmapSize
= cmapSize
;
613 /* Find best match. */
616 for (i
= 0; i
< cmapSize
; i
++) {
617 double dr
= 0.30 * ((double) color
->red
- (double) ctable
[i
].red
);
618 double dg
= 0.59 * ((double) color
->green
- (double) ctable
[i
].green
);
619 double db
= 0.11 * ((double) color
->blue
- (double) ctable
[i
].blue
);
620 double dist
= dr
* dr
+ dg
* dg
+ db
* db
;
621 if (bestmatch
< 0 || dist
< mindist
) {
628 subColor
.red
= ctable
[bestmatch
].red
;
629 subColor
.green
= ctable
[bestmatch
].green
;
630 subColor
.blue
= ctable
[bestmatch
].blue
;
631 /* Try to allocate the closest match color. This should only
632 * fail if the cell is read/write. Otherwise, we're incrementing
633 * the cell's reference count.
637 &subColor
.red
, &subColor
.green
, &subColor
.blue
,
639 client
) == Success
) {
641 if (XAllocColor(dpy
, cmap
, &subColor
)) {
646 /* do this to work around a problem reported by Frank Ortega */
647 subColor
.pixel
= (unsigned long) bestmatch
;
648 subColor
.red
= ctable
[bestmatch
].red
;
649 subColor
.green
= ctable
[bestmatch
].green
;
650 subColor
.blue
= ctable
[bestmatch
].blue
;
651 subColor
.flags
= DoRed
| DoGreen
| DoBlue
;
658 /* don't free table, save it for next time */
668 * Do setup for PF_GRAYSCALE pixel format.
669 * Note that buffer may be NULL.
672 setup_grayscale(int client
, XMesaVisual v
,
673 XMesaBuffer buffer
, XMesaColormap cmap
)
675 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
680 XMesaBuffer prevBuffer
;
686 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
688 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
689 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
690 /* Copy colormap stuff from previous XMesaBuffer which uses same
691 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
693 copy_colortable_info(buffer
, prevBuffer
);
696 /* Allocate 256 shades of gray */
698 int colorsfailed
= 0;
699 for (gray
=0;gray
<256;gray
++) {
700 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
701 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
702 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
705 xcol
.red
= (r
<< 8) | r
;
706 xcol
.green
= (g
<< 8) | g
;
707 xcol
.blue
= (b
<< 8) | b
;
708 noFaultXAllocColor( client
, v
->display
,
709 cmap
, GET_COLORMAP_SIZE(v
),
710 &xcol
, &exact
, &alloced
);
715 assert(buffer
->num_alloced
<256);
716 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
717 buffer
->num_alloced
++;
722 buffer->color_table[gray*3+0] = xcol.pixel;
723 buffer->color_table[gray*3+1] = xcol.pixel;
724 buffer->color_table[gray*3+2] = xcol.pixel;
725 assert(xcol.pixel < 65536);
726 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
727 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
728 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
730 buffer
->color_table
[gray
] = xcol
.pixel
;
731 assert(xcol
.pixel
< 65536);
732 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
733 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
734 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
737 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
739 "Note: %d out of 256 needed colors do not match exactly.\n",
745 v
->dithered_pf
= PF_Grayscale
;
746 v
->undithered_pf
= PF_Grayscale
;
753 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
754 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
755 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
756 * color. While this function was originally designed just for 8-bit
757 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
758 * Dithering code contributed by Bob Mercier.
761 setup_dithered_color(int client
, XMesaVisual v
,
762 XMesaBuffer buffer
, XMesaColormap cmap
)
764 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
769 XMesaBuffer prevBuffer
;
775 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
777 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
778 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
779 /* Copy colormap stuff from previous, matching XMesaBuffer.
780 * Do this to avoid time spent in noFaultXAllocColor.
782 copy_colortable_info(buffer
, prevBuffer
);
785 /* Allocate X colors and initialize color_table[], red_table[], etc */
787 int colorsfailed
= 0;
788 for (r
= 0; r
< DITH_R
; r
++) {
789 for (g
= 0; g
< DITH_G
; g
++) {
790 for (b
= 0; b
< DITH_B
; b
++) {
793 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(DITH_R
-1),65535);
794 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(DITH_G
-1),65535);
795 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(DITH_B
-1),65535);
796 noFaultXAllocColor( client
, v
->display
,
797 cmap
, GET_COLORMAP_SIZE(v
),
798 &xcol
, &exact
, &alloced
);
803 assert(buffer
->num_alloced
<256);
804 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
805 buffer
->num_alloced
++;
807 i
= DITH_MIX( r
, g
, b
);
809 buffer
->color_table
[i
] = xcol
.pixel
;
810 assert(xcol
.pixel
< 65536);
811 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (DITH_R
-1);
812 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (DITH_G
-1);
813 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (DITH_B
-1);
818 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
820 "Note: %d out of %d needed colors do not match exactly.\n",
821 colorsfailed
, DITH_R
* DITH_G
* DITH_B
);
826 v
->dithered_pf
= PF_Dither
;
827 v
->undithered_pf
= PF_Lookup
;
833 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
834 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
835 * Special dithering tables have to be initialized.
838 setup_8bit_hpcr(XMesaVisual v
)
840 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
841 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
842 * on the root window AND the colormap obtainable by XGetRGBColormaps
843 * for that atom must be set on the window. (see also tkInitWindow)
844 * If that colormap is not set, the output will look stripy.
847 /* Setup color tables with gamma correction */
851 g
= 1.0 / v
->RedGamma
;
852 for (i
=0; i
<256; i
++) {
853 GLint red
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[0][i
]/255.0, g
));
854 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
857 g
= 1.0 / v
->GreenGamma
;
858 for (i
=0; i
<256; i
++) {
859 GLint green
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[1][i
]/255.0, g
));
860 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
863 g
= 1.0 / v
->BlueGamma
;
864 for (i
=0; i
<256; i
++) {
865 GLint blue
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[2][i
]/255.0, g
));
866 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
868 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
869 v
->dithered_pf
= PF_HPCR
;
871 /* which method should I use to clear */
872 /* GL_FALSE: keep the ordinary method */
873 /* GL_TRUE : clear with dither pattern */
874 v
->hpcr_clear_flag
= _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
876 if (v
->hpcr_clear_flag
) {
877 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
878 DefaultRootWindow(v
->display
),
880 #ifndef XFree86Server
881 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
882 0, 0, 16, 2, AllPlanes
, ZPixmap
);
889 * Setup RGB rendering for a window with a True/DirectColor visual.
892 setup_truecolor(XMesaVisual v
, XMesaBuffer buffer
, XMesaColormap cmap
)
894 unsigned long rmask
, gmask
, bmask
;
898 /* Compute red multiplier (mask) and bit shift */
900 rmask
= GET_REDMASK(v
);
901 while ((rmask
& 1)==0) {
906 /* Compute green multiplier (mask) and bit shift */
908 gmask
= GET_GREENMASK(v
);
909 while ((gmask
& 1)==0) {
914 /* Compute blue multiplier (mask) and bit shift */
916 bmask
= GET_BLUEMASK(v
);
917 while ((bmask
& 1)==0) {
923 * Compute component-to-pixel lookup tables and dithering kernel
926 static GLubyte kernel
[16] = {
927 0*16, 8*16, 2*16, 10*16,
928 12*16, 4*16, 14*16, 6*16,
929 3*16, 11*16, 1*16, 9*16,
930 15*16, 7*16, 13*16, 5*16,
932 GLint rBits
= _mesa_bitcount(rmask
);
933 GLint gBits
= _mesa_bitcount(gmask
);
934 GLint bBits
= _mesa_bitcount(bmask
);
938 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
939 for (i
=0; i
<=rmask
; i
++)
940 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
941 for (i
=0; i
<=gmask
; i
++)
942 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
943 for (i
=0; i
<=bmask
; i
++)
944 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
946 /* convert RGB values from [0,255] to pixel components */
948 for (i
=0;i
<256;i
++) {
949 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
950 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
951 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
952 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
953 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
954 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
956 /* overflow protection */
957 for (i
=256;i
<512;i
++) {
958 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
959 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
960 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
963 /* setup dithering kernel */
965 if (gBits
> maxBits
) maxBits
= gBits
;
966 if (bBits
> maxBits
) maxBits
= bBits
;
968 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
971 v
->undithered_pf
= PF_Truecolor
;
972 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_Dither_True
: PF_Truecolor
;
976 * Now check for TrueColor visuals which we can optimize.
978 if ( GET_REDMASK(v
) ==0x0000ff
979 && GET_GREENMASK(v
)==0x00ff00
980 && GET_BLUEMASK(v
) ==0xff0000
981 && CHECK_BYTE_ORDER(v
)
982 && v
->BitsPerPixel
==32
983 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
984 /* common 32 bpp config used on SGI, Sun */
985 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
; /* ABGR */
987 else if (GET_REDMASK(v
) == 0xff0000
988 && GET_GREENMASK(v
)== 0x00ff00
989 && GET_BLUEMASK(v
) == 0x0000ff
990 && CHECK_BYTE_ORDER(v
)
991 && v
->RedGamma
== 1.0 && v
->GreenGamma
== 1.0 && v
->BlueGamma
== 1.0){
992 if (v
->BitsPerPixel
==32) {
993 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
994 if (GET_VISUAL_DEPTH(v
) == 32 && v
->mesa_visual
.alphaBits
== 8)
995 v
->undithered_pf
= v
->dithered_pf
= PF_8A8R8G8B
; /* ARGB */
997 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
; /* xRGB */
999 else if (v
->BitsPerPixel
== 24) {
1000 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
; /* RGB */
1003 else if (GET_REDMASK(v
) ==0xf800
1004 && GET_GREENMASK(v
)==0x07e0
1005 && GET_BLUEMASK(v
) ==0x001f
1006 && CHECK_BYTE_ORDER(v
)
1007 && v
->BitsPerPixel
==16
1008 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1010 v
->undithered_pf
= PF_5R6G5B
;
1011 v
->dithered_pf
= PF_Dither_5R6G5B
;
1013 else if (GET_REDMASK(v
) ==0xe0
1014 && GET_GREENMASK(v
)==0x1c
1015 && GET_BLUEMASK(v
) ==0x03
1016 && CHECK_FOR_HPCR(v
)) {
1017 /* 8-bit HP color recovery */
1018 setup_8bit_hpcr( v
);
1025 * Setup RGB rendering for a window with a monochrome visual.
1028 setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
1031 v
->dithered_pf
= v
->undithered_pf
= PF_1Bit
;
1032 /* if black=1 then we must flip pixel values */
1033 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
1039 * When a context is bound for the first time, we can finally finish
1040 * initializing the context's visual and buffer information.
1041 * \param v the XMesaVisual to initialize
1042 * \param b the XMesaBuffer to initialize (may be NULL)
1043 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1044 * \param window the window/pixmap we're rendering into
1045 * \param cmap the colormap associated with the window/pixmap
1046 * \return GL_TRUE=success, GL_FALSE=failure
1049 initialize_visual_and_buffer(XMesaVisual v
, XMesaBuffer b
,
1050 GLboolean rgb_flag
, XMesaDrawable window
,
1055 #ifdef XFree86Server
1056 client
= (window
) ? CLIENT_ID(window
->id
) : 0;
1059 ASSERT(!b
|| b
->xm_visual
== v
);
1061 /* Save true bits/pixel */
1062 v
->BitsPerPixel
= bits_per_pixel(v
);
1063 assert(v
->BitsPerPixel
> 0);
1065 if (rgb_flag
== GL_FALSE
) {
1066 /* COLOR-INDEXED WINDOW:
1067 * Even if the visual is TrueColor or DirectColor we treat it as
1068 * being color indexed. This is weird but might be useful to someone.
1070 v
->dithered_pf
= v
->undithered_pf
= PF_Index
;
1071 v
->mesa_visual
.indexBits
= GET_VISUAL_DEPTH(v
);
1075 * We support RGB rendering into almost any kind of visual.
1077 const int xclass
= v
->mesa_visual
.visualType
;
1078 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1079 setup_truecolor( v
, b
, cmap
);
1081 else if (xclass
== GLX_STATIC_GRAY
&& GET_VISUAL_DEPTH(v
) == 1) {
1082 setup_monochrome( v
, b
);
1084 else if (xclass
== GLX_GRAY_SCALE
|| xclass
== GLX_STATIC_GRAY
) {
1085 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1089 else if ((xclass
== GLX_PSEUDO_COLOR
|| xclass
== GLX_STATIC_COLOR
)
1090 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1091 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1096 _mesa_warning(NULL
, "XMesa: RGB mode rendering not supported in given visual.\n");
1099 v
->mesa_visual
.indexBits
= 0;
1101 if (_mesa_getenv("MESA_NO_DITHER")) {
1102 v
->dithered_pf
= v
->undithered_pf
;
1108 * If MESA_INFO env var is set print out some debugging info
1109 * which can help Brian figure out what's going on when a user
1112 if (_mesa_getenv("MESA_INFO")) {
1113 _mesa_printf("X/Mesa visual = %p\n", (void *) v
);
1114 _mesa_printf("X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1115 _mesa_printf("X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1116 _mesa_printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
1117 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1118 _mesa_printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1124 /* Do window-specific initializations */
1126 /* these should have been set in create_xmesa_buffer */
1127 ASSERT(b
->frontxrb
->drawable
== window
);
1128 ASSERT(b
->frontxrb
->pixmap
== (XMesaPixmap
) window
);
1130 /* Setup for single/double buffering */
1131 if (v
->mesa_visual
.doubleBufferMode
) {
1132 /* Double buffered */
1133 b
->shm
= check_for_xshm( v
->display
);
1136 /* X11 graphics contexts */
1137 #ifdef XFree86Server
1138 b
->gc
= CreateScratchGC(v
->display
, window
->depth
);
1140 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1142 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1144 /* cleargc - for glClear() */
1145 #ifdef XFree86Server
1146 b
->cleargc
= CreateScratchGC(v
->display
, window
->depth
);
1148 b
->cleargc
= XCreateGC( v
->display
, window
, 0, NULL
);
1150 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1153 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1154 * Patch contributed by Michael Pichler May 15, 1995.
1156 #ifdef XFree86Server
1157 b
->swapgc
= CreateScratchGC(v
->display
, window
->depth
);
1161 dixChangeGC(NullClient
, b
->swapgc
, GCGraphicsExposures
, v
, NULL
);
1166 gcvalues
.graphics_exposures
= False
;
1167 b
->swapgc
= XCreateGC(v
->display
, window
,
1168 GCGraphicsExposures
, &gcvalues
);
1171 XMesaSetFunction( v
->display
, b
->swapgc
, GXcopy
);
1173 * Set fill style and tile pixmap once for all for HPCR stuff
1174 * (instead of doing it each time in clear_color_HPCR_pixmap())
1175 * Initialize whole stuff
1176 * Patch contributed by Jacques Leroy March 8, 1998.
1178 if (v
->hpcr_clear_flag
&& b
->backxrb
&& b
->backxrb
->pixmap
) {
1180 for (i
= 0; i
< 16; i
++) {
1181 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1182 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1184 XMesaPutImage(b
->display
, (XMesaDrawable
) v
->hpcr_clear_pixmap
,
1185 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1186 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1187 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1190 /* Initialize the row buffer XImage for use in write_color_span() */
1191 data
= (char*) MALLOC(MAX_WIDTH
*4);
1192 #ifdef XFree86Server
1193 b
->rowimage
= XMesaCreateImage(GET_VISUAL_DEPTH(v
), MAX_WIDTH
, 1, data
);
1195 b
->rowimage
= XCreateImage( v
->display
,
1198 ZPixmap
, 0, /*format, offset*/
1200 MAX_WIDTH
, 1, /*width, height*/
1202 0 /*bytes_per_line*/ );
1214 * Convert an RGBA color to a pixel value.
1217 xmesa_color_to_pixel(GLcontext
*ctx
,
1218 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1221 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1222 switch (pixelFormat
) {
1228 PACK_TRUECOLOR( p
, r
, g
, b
);
1232 return PACK_8A8B8G8R( r
, g
, b
, a
);
1234 return PACK_8A8R8G8B( r
, g
, b
, a
);
1238 return PACK_8R8G8B( r
, g
, b
);
1240 return PACK_5R6G5B( r
, g
, b
);
1244 return DITHER( 1, 0, r
, g
, b
);
1247 /* 382 = (3*255)/2 */
1248 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1250 return DITHER_HPCR(1, 1, r
, g
, b
);
1254 return LOOKUP( r
, g
, b
);
1257 return GRAY_RGB( r
, g
, b
);
1258 case PF_Dither_True
:
1260 case PF_Dither_5R6G5B
:
1263 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1267 _mesa_problem(ctx
, "Bad pixel format in xmesa_color_to_pixel");
1273 #define NUM_VISUAL_TYPES 6
1276 * Convert an X visual type to a GLX visual type.
1278 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1280 * \return If \c visualType is a valid X visual type, a GLX visual type will
1281 * be returned. Otherwise \c GLX_NONE will be returned.
1284 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1288 xmesa_convert_from_x_visual_type( int visualType
)
1290 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
1291 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
1292 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
1293 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
1296 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
1297 ? glx_visual_types
[ visualType
] : GLX_NONE
;
1301 /**********************************************************************/
1302 /***** Public Functions *****/
1303 /**********************************************************************/
1306 #ifdef IN_DRI_DRIVER
1307 #define need_GL_VERSION_1_3
1308 #define need_GL_VERSION_1_4
1309 #define need_GL_VERSION_1_5
1310 #define need_GL_VERSION_2_0
1312 /* sw extensions for imaging */
1313 #define need_GL_EXT_blend_color
1314 #define need_GL_EXT_blend_minmax
1315 #define need_GL_EXT_convolution
1316 #define need_GL_EXT_histogram
1317 #define need_GL_SGI_color_table
1319 /* sw extensions not associated with some GL version */
1320 #define need_GL_ARB_draw_elements_base_vertex
1321 #define need_GL_ARB_shader_objects
1322 #define need_GL_ARB_sync
1323 #define need_GL_ARB_vertex_program
1324 #define need_GL_APPLE_vertex_array_object
1325 #define need_GL_ATI_fragment_shader
1326 #define need_GL_EXT_depth_bounds_test
1327 #define need_GL_EXT_framebuffer_object
1328 #define need_GL_EXT_framebuffer_blit
1329 #define need_GL_EXT_gpu_program_parameters
1330 #define need_GL_EXT_paletted_texture
1331 #define need_GL_MESA_resize_buffers
1332 #define need_GL_NV_vertex_program
1333 #define need_GL_NV_fragment_program
1335 #include "extension_helper.h"
1338 const struct dri_extension card_extensions
[] =
1340 { "GL_VERSION_1_3", GL_VERSION_1_3_functions
},
1341 { "GL_VERSION_1_4", GL_VERSION_1_4_functions
},
1342 { "GL_VERSION_1_5", GL_VERSION_1_5_functions
},
1343 { "GL_VERSION_2_0", GL_VERSION_2_0_functions
},
1345 { "GL_EXT_blend_color", GL_EXT_blend_color_functions
},
1346 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions
},
1347 { "GL_EXT_convolution", GL_EXT_convolution_functions
},
1348 { "GL_EXT_histogram", GL_EXT_histogram_functions
},
1349 { "GL_SGI_color_table", GL_SGI_color_table_functions
},
1351 { "GL_ARB_depth_clamp", NULL
},
1352 { "GL_ARB_draw_elements_base_vertex", GL_ARB_draw_elements_base_vertex_functions
},
1353 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions
},
1354 { "GL_ARB_sync", GL_ARB_sync_functions
},
1355 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions
},
1356 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions
},
1357 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions
},
1358 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions
},
1359 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions
},
1360 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions
},
1361 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions
},
1362 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions
},
1363 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions
},
1364 { "GL_NV_depth_clamp", NULL
},
1365 { "GL_NV_vertex_program", GL_NV_vertex_program_functions
},
1366 { "GL_NV_fragment_program", GL_NV_fragment_program_functions
},
1372 * Create a new X/Mesa visual.
1373 * Input: display - X11 display
1374 * visinfo - an XVisualInfo pointer
1375 * rgb_flag - GL_TRUE = RGB mode,
1376 * GL_FALSE = color index mode
1377 * alpha_flag - alpha buffer requested?
1378 * db_flag - GL_TRUE = double-buffered,
1379 * GL_FALSE = single buffered
1380 * stereo_flag - stereo visual?
1381 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1382 * GL_FALSE = use an off-screen pixmap for back buffer
1383 * depth_size - requested bits/depth values, or zero
1384 * stencil_size - requested bits/stencil values, or zero
1385 * accum_red_size - requested bits/red accum values, or zero
1386 * accum_green_size - requested bits/green accum values, or zero
1387 * accum_blue_size - requested bits/blue accum values, or zero
1388 * accum_alpha_size - requested bits/alpha accum values, or zero
1389 * num_samples - number of samples/pixel if multisampling, or zero
1390 * level - visual level, usually 0
1391 * visualCaveat - ala the GLX extension, usually GLX_NONE
1392 * Return; a new XMesaVisual or 0 if error.
1395 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1396 XMesaVisualInfo visinfo
,
1398 GLboolean alpha_flag
,
1400 GLboolean stereo_flag
,
1401 GLboolean ximage_flag
,
1404 GLint accum_red_size
,
1405 GLint accum_green_size
,
1406 GLint accum_blue_size
,
1407 GLint accum_alpha_size
,
1410 GLint visualCaveat
)
1414 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1416 #ifdef IN_DRI_DRIVER
1417 /* driInitExtensions() should be called once per screen to setup extension
1418 * indices. There is no need to call it when the context is created since
1419 * XMesa enables mesa sw extensions on its own.
1421 driInitExtensions( NULL
, card_extensions
, GL_FALSE
);
1424 #ifndef XFree86Server
1425 /* For debugging only */
1426 if (_mesa_getenv("MESA_XSYNC")) {
1427 /* This makes debugging X easier.
1428 * In your debugger, set a breakpoint on _XError to stop when an
1429 * X protocol error is generated.
1431 XSynchronize( display
, 1 );
1435 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1440 v
->display
= display
;
1442 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1443 * the struct but we may need some of the information contained in it
1446 #ifndef XFree86Server
1447 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1452 MEMCPY(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1455 /* check for MESA_GAMMA environment variable */
1456 gamma
= _mesa_getenv("MESA_GAMMA");
1458 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1459 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1460 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1461 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1462 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1465 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1468 v
->ximage_flag
= ximage_flag
;
1470 #ifdef XFree86Server
1471 /* We could calculate these values by ourselves. nplanes is either the sum
1472 * of the red, green, and blue bits or the number index bits.
1473 * ColormapEntries is either (1U << index_bits) or
1474 * (1U << max(redBits, greenBits, blueBits)).
1476 assert(visinfo
->nplanes
> 0);
1477 v
->nplanes
= visinfo
->nplanes
;
1478 v
->ColormapEntries
= visinfo
->ColormapEntries
;
1480 v
->mesa_visual
.redMask
= visinfo
->redMask
;
1481 v
->mesa_visual
.greenMask
= visinfo
->greenMask
;
1482 v
->mesa_visual
.blueMask
= visinfo
->blueMask
;
1483 v
->mesa_visual
.visualID
= visinfo
->vid
;
1484 v
->mesa_visual
.screen
= 0; /* FIXME: What should be done here? */
1486 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
1487 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
1488 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
1489 v
->mesa_visual
.visualID
= visinfo
->visualid
;
1490 v
->mesa_visual
.screen
= visinfo
->screen
;
1493 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1494 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
1496 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
1499 v
->mesa_visual
.visualRating
= visualCaveat
;
1502 v
->mesa_visual
.alphaBits
= 8;
1504 (void) initialize_visual_and_buffer( v
, NULL
, rgb_flag
, 0, 0 );
1507 const int xclass
= v
->mesa_visual
.visualType
;
1508 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1509 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
1510 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
1511 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
1514 /* this is an approximation */
1516 depth
= GET_VISUAL_DEPTH(v
);
1517 red_bits
= depth
/ 3;
1519 green_bits
= depth
/ 2;
1520 depth
-= green_bits
;
1523 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1525 alpha_bits
= v
->mesa_visual
.alphaBits
;
1528 _mesa_initialize_visual( &v
->mesa_visual
,
1529 rgb_flag
, db_flag
, stereo_flag
,
1530 red_bits
, green_bits
,
1531 blue_bits
, alpha_bits
,
1532 v
->mesa_visual
.indexBits
,
1535 accum_red_size
, accum_green_size
,
1536 accum_blue_size
, accum_alpha_size
,
1539 /* XXX minor hack */
1540 v
->mesa_visual
.level
= level
;
1546 void XMesaDestroyVisual( XMesaVisual v
)
1548 #ifndef XFree86Server
1549 _mesa_free(v
->visinfo
);
1557 * Create a new XMesaContext.
1558 * \param v the XMesaVisual
1559 * \param share_list another XMesaContext with which to share display
1560 * lists or NULL if no sharing is wanted.
1561 * \return an XMesaContext or NULL if error.
1564 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1566 static GLboolean firstTime
= GL_TRUE
;
1569 struct dd_function_table functions
;
1573 _glthread_INIT_MUTEX(_xmesa_lock
);
1574 firstTime
= GL_FALSE
;
1577 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1578 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1582 mesaCtx
= &(c
->mesa
);
1584 /* initialize with default driver functions, then plug in XMesa funcs */
1585 _mesa_init_driver_functions(&functions
);
1586 xmesa_init_driver_functions(v
, &functions
);
1587 if (!_mesa_initialize_context(mesaCtx
, &v
->mesa_visual
,
1588 share_list
? &(share_list
->mesa
) : (GLcontext
*) NULL
,
1589 &functions
, (void *) c
)) {
1594 /* Enable this to exercise fixed function -> shader translation
1595 * with software rendering.
1598 mesaCtx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1599 mesaCtx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1602 _mesa_enable_sw_extensions(mesaCtx
);
1603 _mesa_enable_1_3_extensions(mesaCtx
);
1604 _mesa_enable_1_4_extensions(mesaCtx
);
1605 _mesa_enable_1_5_extensions(mesaCtx
);
1606 _mesa_enable_2_0_extensions(mesaCtx
);
1607 _mesa_enable_2_1_extensions(mesaCtx
);
1608 #if ENABLE_EXT_texure_compression_s3tc
1609 if (mesaCtx
->Mesa_DXTn
) {
1610 _mesa_enable_extension(mesaCtx
, "GL_EXT_texture_compression_s3tc");
1611 _mesa_enable_extension(mesaCtx
, "GL_S3_s3tc");
1613 _mesa_enable_extension(mesaCtx
, "GL_3DFX_texture_compression_FXT1");
1615 #if ENABLE_EXT_timer_query
1616 _mesa_enable_extension(mesaCtx
, "GL_EXT_timer_query");
1619 #ifdef XFree86Server
1620 /* If we're running in the X server, do bounds checking to prevent
1621 * segfaults and server crashes!
1623 mesaCtx
->Const
.CheckArrayBounds
= GL_TRUE
;
1626 /* finish up xmesa context initializations */
1627 c
->swapbytes
= CHECK_BYTE_ORDER(v
) ? GL_FALSE
: GL_TRUE
;
1629 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1630 c
->display
= v
->display
;
1631 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1633 /* Initialize the software rasterizer and helper modules.
1635 if (!_swrast_CreateContext( mesaCtx
) ||
1636 !_vbo_CreateContext( mesaCtx
) ||
1637 !_tnl_CreateContext( mesaCtx
) ||
1638 !_swsetup_CreateContext( mesaCtx
)) {
1639 _mesa_free_context_data(&c
->mesa
);
1645 tnl
= TNL_CONTEXT(mesaCtx
);
1646 tnl
->Driver
.RunPipeline
= _tnl_run_pipeline
;
1648 xmesa_register_swrast_functions( mesaCtx
);
1649 _swsetup_Wakeup(mesaCtx
);
1651 if (TEST_META_FUNCS
)
1652 _mesa_meta_init(mesaCtx
);
1660 void XMesaDestroyContext( XMesaContext c
)
1662 GLcontext
*mesaCtx
= &c
->mesa
;
1665 FXdestroyContext( XMESA_BUFFER(mesaCtx
->DrawBuffer
) );
1668 if (TEST_META_FUNCS
)
1669 _mesa_meta_free( mesaCtx
);
1671 _swsetup_DestroyContext( mesaCtx
);
1672 _swrast_DestroyContext( mesaCtx
);
1673 _tnl_DestroyContext( mesaCtx
);
1674 _vbo_DestroyContext( mesaCtx
);
1675 _mesa_free_context_data( mesaCtx
);
1682 * Private function for creating an XMesaBuffer which corresponds to an
1683 * X window or pixmap.
1684 * \param v the window's XMesaVisual
1685 * \param w the window we're wrapping
1686 * \return new XMesaBuffer or NULL if error
1689 XMesaCreateWindowBuffer(XMesaVisual v
, XMesaWindow w
)
1691 #ifndef XFree86Server
1692 XWindowAttributes attr
;
1701 /* Check that window depth matches visual depth */
1702 #ifdef XFree86Server
1703 depth
= ((XMesaDrawable
)w
)->depth
;
1705 XGetWindowAttributes( v
->display
, w
, &attr
);
1708 if (GET_VISUAL_DEPTH(v
) != depth
) {
1709 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1710 GET_VISUAL_DEPTH(v
), depth
);
1715 #ifdef XFree86Server
1716 cmap
= (ColormapPtr
)LookupIDByType(wColormap(w
), RT_COLORMAP
);
1718 if (attr
.colormap
) {
1719 cmap
= attr
.colormap
;
1722 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
1723 /* this is weird, a window w/out a colormap!? */
1724 /* OK, let's just allocate a new one and hope for the best */
1725 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1729 b
= create_xmesa_buffer((XMesaDrawable
) w
, WINDOW
, v
, cmap
);
1733 if (!initialize_visual_and_buffer( v
, b
, v
->mesa_visual
.rgbMode
,
1734 (XMesaDrawable
) w
, cmap
)) {
1735 xmesa_free_buffer(b
);
1745 * Create a new XMesaBuffer from an X pixmap.
1747 * \param v the XMesaVisual
1748 * \param p the pixmap
1749 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1750 * \c GLX_DIRECT_COLOR visual for the pixmap
1751 * \returns new XMesaBuffer or NULL if error
1754 XMesaCreatePixmapBuffer(XMesaVisual v
, XMesaPixmap p
, XMesaColormap cmap
)
1760 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1764 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1765 (XMesaDrawable
) p
, cmap
)) {
1766 xmesa_free_buffer(b
);
1775 * For GLX_EXT_texture_from_pixmap
1778 XMesaCreatePixmapTextureBuffer(XMesaVisual v
, XMesaPixmap p
,
1780 int format
, int target
, int mipmap
)
1782 GET_CURRENT_CONTEXT(ctx
);
1784 GLuint width
, height
;
1788 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1792 /* get pixmap size, update framebuffer/renderbuffer dims */
1793 xmesa_get_window_size(v
->display
, b
, &width
, &height
);
1794 _mesa_resize_framebuffer(NULL
, &(b
->mesa_buffer
), width
, height
);
1798 if (ctx
->Extensions
.ARB_texture_non_power_of_two
) {
1799 target
= GLX_TEXTURE_2D_EXT
;
1801 else if ( _mesa_bitcount(width
) == 1
1802 && _mesa_bitcount(height
) == 1) {
1803 /* power of two size */
1805 target
= GLX_TEXTURE_1D_EXT
;
1808 target
= GLX_TEXTURE_2D_EXT
;
1811 else if (ctx
->Extensions
.NV_texture_rectangle
) {
1812 target
= GLX_TEXTURE_RECTANGLE_EXT
;
1815 /* non power of two textures not supported */
1816 XMesaDestroyBuffer(b
);
1821 b
->TextureTarget
= target
;
1822 b
->TextureFormat
= format
;
1823 b
->TextureMipmap
= mipmap
;
1825 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1826 (XMesaDrawable
) p
, cmap
)) {
1827 xmesa_free_buffer(b
);
1837 XMesaCreatePBuffer(XMesaVisual v
, XMesaColormap cmap
,
1838 unsigned int width
, unsigned int height
)
1840 #ifndef XFree86Server
1842 XMesaDrawable drawable
; /* X Pixmap Drawable */
1845 /* allocate pixmap for front buffer */
1846 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1847 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1852 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1856 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1858 xmesa_free_buffer(b
);
1871 * Deallocate an XMesaBuffer structure and all related info.
1874 XMesaDestroyBuffer(XMesaBuffer b
)
1876 xmesa_free_buffer(b
);
1881 * Query the current window size and update the corresponding GLframebuffer
1882 * and all attached renderbuffers.
1884 * 1. the first time a buffer is bound to a context.
1885 * 2. from glViewport to poll for window size changes
1886 * 3. from the XMesaResizeBuffers() API function.
1887 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1888 * when resizing a buffer when no rendering context is bound.
1891 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
)
1893 GLuint width
, height
;
1894 xmesa_get_window_size(drawBuffer
->display
, drawBuffer
, &width
, &height
);
1895 if (drawBuffer
->mesa_buffer
.Width
!= width
||
1896 drawBuffer
->mesa_buffer
.Height
!= height
) {
1897 GLcontext
*ctx
= xmctx
? &xmctx
->mesa
: NULL
;
1898 _mesa_resize_framebuffer(ctx
, &(drawBuffer
->mesa_buffer
), width
, height
);
1900 drawBuffer
->mesa_buffer
.Initialized
= GL_TRUE
; /* XXX TEMPORARY? */
1905 * Bind buffer b to context c and make c the current rendering context.
1907 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
1909 return XMesaMakeCurrent2( c
, b
, b
);
1914 * Bind buffer b to context c and make c the current rendering context.
1917 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1918 XMesaBuffer readBuffer
)
1921 if (!drawBuffer
|| !readBuffer
)
1922 return GL_FALSE
; /* must specify buffers! */
1924 if (&(c
->mesa
) == _mesa_get_current_context()
1925 && c
->mesa
.DrawBuffer
== &drawBuffer
->mesa_buffer
1926 && c
->mesa
.ReadBuffer
== &readBuffer
->mesa_buffer
1927 && XMESA_BUFFER(c
->mesa
.DrawBuffer
)->wasCurrent
) {
1928 /* same context and buffer, do nothing */
1932 c
->xm_buffer
= drawBuffer
;
1935 if (FXmakeCurrent( drawBuffer
))
1939 /* Call this periodically to detect when the user has begun using
1940 * GL rendering from multiple threads.
1942 _glapi_check_multithread();
1944 xmesa_check_and_update_buffer_size(c
, drawBuffer
);
1945 if (readBuffer
!= drawBuffer
)
1946 xmesa_check_and_update_buffer_size(c
, readBuffer
);
1948 _mesa_make_current(&(c
->mesa
),
1949 &drawBuffer
->mesa_buffer
,
1950 &readBuffer
->mesa_buffer
);
1952 if (c
->xm_visual
->mesa_visual
.rgbMode
) {
1954 * Must recompute and set these pixel values because colormap
1955 * can be different for different windows.
1957 c
->clearpixel
= xmesa_color_to_pixel( &c
->mesa
,
1962 c
->xm_visual
->undithered_pf
);
1963 XMesaSetForeground(c
->display
, drawBuffer
->cleargc
, c
->clearpixel
);
1966 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1967 drawBuffer
->wasCurrent
= GL_TRUE
;
1971 _mesa_make_current( NULL
, NULL
, NULL
);
1978 * Unbind the context c from its buffer.
1980 GLboolean
XMesaUnbindContext( XMesaContext c
)
1982 /* A no-op for XFree86 integration purposes */
1987 XMesaContext
XMesaGetCurrentContext( void )
1989 GET_CURRENT_CONTEXT(ctx
);
1991 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
2000 XMesaBuffer
XMesaGetCurrentBuffer( void )
2002 GET_CURRENT_CONTEXT(ctx
);
2004 XMesaBuffer xmbuf
= XMESA_BUFFER(ctx
->DrawBuffer
);
2013 /* New in Mesa 3.1 */
2014 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
2016 GET_CURRENT_CONTEXT(ctx
);
2018 return XMESA_BUFFER(ctx
->ReadBuffer
);
2026 #ifdef XFree86Server
2028 GLboolean
XMesaForceCurrent(XMesaContext c
)
2031 _glapi_set_dispatch(c
->mesa
.CurrentDispatch
);
2033 if (&(c
->mesa
) != _mesa_get_current_context()) {
2034 _mesa_make_current(&c
->mesa
, c
->mesa
.DrawBuffer
, c
->mesa
.ReadBuffer
);
2038 _mesa_make_current(NULL
, NULL
, NULL
);
2045 GLboolean
XMesaLoseCurrent(XMesaContext c
)
2048 _mesa_make_current(NULL
, NULL
, NULL
);
2054 GLboolean
XMesaCopyContext( XMesaContext xm_src
, XMesaContext xm_dst
, GLuint mask
)
2056 _mesa_copy_context(&xm_src
->mesa
, &xm_dst
->mesa
, mask
);
2059 #endif /* XFree86Server */
2063 GLboolean
XMesaSetFXmode( GLint mode
)
2073 * Copy the back buffer to the front buffer. If there's no back buffer
2077 void XMesaSwapBuffers( XMesaBuffer b
)
2079 GET_CURRENT_CONTEXT(ctx
);
2082 /* single buffered */
2086 /* If we're swapping the buffer associated with the current context
2087 * we have to flush any pending rendering commands first.
2089 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2090 _mesa_notifySwapBuffers(ctx
);
2094 if (FXswapBuffers(b
))
2097 if (b
->backxrb
->ximage
) {
2098 /* Copy Ximage (back buf) from client memory to server window */
2099 #if defined(USE_XSHM) && !defined(XFree86Server)
2101 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2102 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2104 b
->backxrb
->ximage
, 0, 0,
2105 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2107 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2112 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2113 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2115 b
->backxrb
->ximage
, 0, 0,
2116 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
);
2117 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2120 else if (b
->backxrb
->pixmap
) {
2121 /* Copy pixmap (back buf) to window (front buf) on server */
2122 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2123 XMesaCopyArea( b
->xm_visual
->display
,
2124 b
->backxrb
->pixmap
, /* source drawable */
2125 b
->frontxrb
->drawable
, /* dest. drawable */
2127 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2128 0, 0 /* dest region */
2130 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2134 _mesa_copy_soft_alpha_renderbuffers(ctx
, &b
->mesa_buffer
);
2136 #if !defined(XFree86Server)
2137 XSync( b
->xm_visual
->display
, False
);
2144 * Copy sub-region of back buffer to front buffer
2146 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
2148 GET_CURRENT_CONTEXT(ctx
);
2150 /* If we're swapping the buffer associated with the current context
2151 * we have to flush any pending rendering commands first.
2153 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2154 _mesa_notifySwapBuffers(ctx
);
2157 /* single buffered */
2162 int yTop
= b
->mesa_buffer
.Height
- y
- height
;
2164 if (FXswapBuffers(b
))
2167 if (b
->backxrb
->ximage
) {
2168 /* Copy Ximage from host's memory to server's window */
2169 #if defined(USE_XSHM) && !defined(XFree86Server)
2171 /* XXX assuming width and height aren't too large! */
2172 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2174 b
->backxrb
->ximage
, x
, yTop
,
2175 x
, yTop
, width
, height
, False
);
2176 /* wait for finished event??? */
2181 /* XXX assuming width and height aren't too large! */
2182 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2184 b
->backxrb
->ximage
, x
, yTop
,
2185 x
, yTop
, width
, height
);
2189 /* Copy pixmap to window on server */
2190 XMesaCopyArea( b
->xm_visual
->display
,
2191 b
->backxrb
->pixmap
, /* source drawable */
2192 b
->frontxrb
->drawable
, /* dest. drawable */
2194 x
, yTop
, width
, height
, /* source region */
2195 x
, yTop
/* dest region */
2203 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2204 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2205 * back buffer directly.
2206 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2207 * ximage - pointer to back buffer's XImage, or NULL
2208 * Return: GL_TRUE = context is double buffered
2209 * GL_FALSE = context is single buffered
2211 #ifndef XFree86Server
2212 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
2213 XMesaPixmap
*pixmap
,
2214 XMesaImage
**ximage
)
2218 *pixmap
= b
->backxrb
->pixmap
;
2220 *ximage
= b
->backxrb
->ximage
;
2229 #endif /* XFree86Server */
2233 * Return the depth buffer associated with an XMesaBuffer.
2234 * Input: b - the XMesa buffer handle
2235 * Output: width, height - size of buffer in pixels
2236 * bytesPerValue - bytes per depth value (2 or 4)
2237 * buffer - pointer to depth buffer values
2238 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2240 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
2241 GLint
*bytesPerValue
, void **buffer
)
2243 struct gl_renderbuffer
*rb
2244 = b
->mesa_buffer
.Attachment
[BUFFER_DEPTH
].Renderbuffer
;
2245 if (!rb
|| !rb
->Data
) {
2253 *width
= b
->mesa_buffer
.Width
;
2254 *height
= b
->mesa_buffer
.Height
;
2255 *bytesPerValue
= b
->mesa_buffer
.Visual
.depthBits
<= 16
2256 ? sizeof(GLushort
) : sizeof(GLuint
);
2263 void XMesaFlush( XMesaContext c
)
2265 if (c
&& c
->xm_visual
) {
2266 #ifdef XFree86Server
2269 XSync( c
->xm_visual
->display
, False
);
2276 const char *XMesaGetString( XMesaContext c
, int name
)
2279 if (name
==XMESA_VERSION
) {
2282 else if (name
==XMESA_EXTENSIONS
) {
2292 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2295 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2296 if (b
->frontxrb
->drawable
== d
&& b
->display
== dpy
) {
2305 * Free/destroy all XMesaBuffers associated with given display.
2307 void xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
)
2309 XMesaBuffer b
, next
;
2310 for (b
= XMesaBufferList
; b
; b
= next
) {
2312 if (b
->display
== dpy
) {
2313 xmesa_free_buffer(b
);
2320 * Look for XMesaBuffers whose X window has been destroyed.
2321 * Deallocate any such XMesaBuffers.
2323 void XMesaGarbageCollect( void )
2325 XMesaBuffer b
, next
;
2326 for (b
=XMesaBufferList
; b
; b
=next
) {
2328 if (b
->display
&& b
->frontxrb
->drawable
&& b
->type
== WINDOW
) {
2329 #ifdef XFree86Server
2332 XSync(b
->display
, False
);
2333 if (!window_exists( b
->display
, b
->frontxrb
->drawable
)) {
2334 /* found a dead window, free the ancillary info */
2335 XMesaDestroyBuffer( b
);
2343 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2344 GLfloat red
, GLfloat green
,
2345 GLfloat blue
, GLfloat alpha
)
2347 GLcontext
*ctx
= &xmesa
->mesa
;
2348 GLint r
= (GLint
) (red
* 255.0F
);
2349 GLint g
= (GLint
) (green
* 255.0F
);
2350 GLint b
= (GLint
) (blue
* 255.0F
);
2351 GLint a
= (GLint
) (alpha
* 255.0F
);
2353 switch (xmesa
->pixelformat
) {
2359 PACK_TRUECOLOR( p
, r
, g
, b
);
2363 return PACK_8A8B8G8R( r
, g
, b
, a
);
2365 return PACK_8A8R8G8B( r
, g
, b
, a
);
2367 return PACK_8R8G8B( r
, g
, b
);
2369 return PACK_5R6G5B( r
, g
, b
);
2373 return DITHER( x
, y
, r
, g
, b
);
2376 /* 382 = (3*255)/2 */
2377 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2379 return DITHER_HPCR(x
, y
, r
, g
, b
);
2383 return LOOKUP( r
, g
, b
);
2386 return GRAY_RGB( r
, g
, b
);
2387 case PF_Dither_5R6G5B
:
2389 case PF_Dither_True
:
2392 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2396 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");
2403 * This is typically called when the window size changes and we need
2404 * to reallocate the buffer's back/depth/stencil/accum buffers.
2407 XMesaResizeBuffers( XMesaBuffer b
)
2409 GET_CURRENT_CONTEXT(ctx
);
2410 XMesaContext xmctx
= XMESA_CONTEXT(ctx
);
2413 xmesa_check_and_update_buffer_size(xmctx
, b
);
2418 xbuffer_to_renderbuffer(int buffer
)
2420 assert(MAX_AUX_BUFFERS
<= 4);
2423 case GLX_FRONT_LEFT_EXT
:
2424 return BUFFER_FRONT_LEFT
;
2425 case GLX_FRONT_RIGHT_EXT
:
2426 return BUFFER_FRONT_RIGHT
;
2427 case GLX_BACK_LEFT_EXT
:
2428 return BUFFER_BACK_LEFT
;
2429 case GLX_BACK_RIGHT_EXT
:
2430 return BUFFER_BACK_RIGHT
;
2443 /* BadValue error */
2450 XMesaBindTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
,
2451 const int *attrib_list
)
2454 GET_CURRENT_CONTEXT(ctx
);
2455 const GLuint unit
= ctx
->Texture
.CurrentUnit
;
2456 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
2457 struct gl_texture_object
*texObj
;
2459 struct gl_renderbuffer
*rb
;
2460 struct xmesa_renderbuffer
*xrb
;
2462 XMesaImage
*img
= NULL
;
2463 GLboolean freeImg
= GL_FALSE
;
2465 b
= xbuffer_to_renderbuffer(buffer
);
2469 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_NONE_EXT
)
2470 return; /* BadMatch error */
2472 rb
= drawable
->mesa_buffer
.Attachment
[b
].Renderbuffer
;
2474 /* invalid buffer */
2477 xrb
= xmesa_renderbuffer(rb
);
2480 switch (drawable
->TextureTarget
) {
2481 case GLX_TEXTURE_1D_EXT
:
2482 texObj
= texUnit
->CurrentTex
[TEXTURE_1D_INDEX
];
2484 case GLX_TEXTURE_2D_EXT
:
2485 texObj
= texUnit
->CurrentTex
[TEXTURE_2D_INDEX
];
2487 case GLX_TEXTURE_RECTANGLE_EXT
:
2488 texObj
= texUnit
->CurrentTex
[TEXTURE_RECT_INDEX
];
2491 return; /* BadMatch error */
2496 * The following is a quick and simple way to implement
2497 * BindTexImage. The better way is to write some new FetchTexel()
2498 * functions which would extract texels from XImages. We'd still
2499 * need to use GetImage when texturing from a Pixmap (front buffer)
2500 * but texturing from a back buffer (XImage) would avoid an image
2506 img
= XMesaGetImage(dpy
, xrb
->pixmap
, 0, 0, rb
->Width
, rb
->Height
, ~0L,
2510 else if (xrb
->ximage
) {
2514 /* store the XImage as a new texture image */
2516 GLenum format
, type
, intFormat
;
2517 if (img
->bits_per_pixel
== 32) {
2519 type
= GL_UNSIGNED_BYTE
;
2520 intFormat
= GL_RGBA
;
2522 else if (img
->bits_per_pixel
== 24) {
2524 type
= GL_UNSIGNED_BYTE
;
2527 else if (img
->bits_per_pixel
== 16) {
2529 type
= GL_UNSIGNED_SHORT_5_6_5
;
2533 _mesa_problem(NULL
, "Unexpected XImage format in XMesaBindTexImage");
2536 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGBA_EXT
) {
2537 intFormat
= GL_RGBA
;
2539 else if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGB_EXT
) {
2543 _mesa_TexImage2D(GL_TEXTURE_2D
, 0, intFormat
, rb
->Width
, rb
->Height
, 0,
2544 format
, type
, img
->data
);
2547 XMesaDestroyImage(img
);
2555 XMesaReleaseTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
)
2557 const GLint b
= xbuffer_to_renderbuffer(buffer
);