2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 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"
69 #include "extensions.h"
70 #include "framebuffer.h"
74 #include "renderbuffer.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"
84 * Global X driver lock
86 _glthread_Mutex _xmesa_lock
;
91 * Lookup tables for HPCR pixel format:
93 static short hpcr_rgbTbl
[3][256] = {
95 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
96 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
97 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
98 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
99 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
100 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
101 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
102 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
103 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
104 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
105 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
106 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
107 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
108 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
109 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
110 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
113 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
114 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
115 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
116 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
117 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
118 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
119 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
120 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
121 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
122 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
123 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
124 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
125 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
126 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
127 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
128 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
131 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
132 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
133 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
134 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
135 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
136 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
137 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
138 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
139 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
140 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
141 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
142 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
143 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
144 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
145 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
146 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
152 /**********************************************************************/
153 /***** X Utility Functions *****/
154 /**********************************************************************/
158 * Return the host's byte order as LSBFirst or MSBFirst ala X.
160 #ifndef XFree86Server
161 static int host_byte_order( void )
164 char *cptr
= (char *) &i
;
165 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
171 * Check if the X Shared Memory extension is available.
172 * Return: 0 = not available
173 * 1 = shared XImage support available
174 * 2 = shared Pixmap support available also
176 static int check_for_xshm( XMesaDisplay
*display
)
178 #if defined(USE_XSHM) && !defined(XFree86Server)
179 int major
, minor
, ignore
;
182 if (XQueryExtension( display
, "MIT-SHM", &ignore
, &ignore
, &ignore
)) {
183 if (XShmQueryVersion( display
, &major
, &minor
, &pixmaps
)==True
) {
184 return (pixmaps
==True
) ? 2 : 1;
194 /* No XSHM support */
201 * Apply gamma correction to an intensity value in [0..max]. Return the
202 * new intensity value.
205 gamma_adjust( GLfloat gamma
, GLint value
, GLint max
)
211 double x
= (double) value
/ (double) max
;
212 return IROUND_POS((GLfloat
) max
* _mesa_pow(x
, 1.0F
/gamma
));
219 * Return the true number of bits per pixel for XImages.
220 * For example, if we request a 24-bit deep visual we may actually need/get
221 * 32bpp XImages. This function returns the appropriate bpp.
222 * Input: dpy - the X display
223 * visinfo - desribes the visual to be used for XImages
224 * Return: true number of bits per pixel for XImages
227 bits_per_pixel( XMesaVisual xmv
)
230 const int depth
= xmv
->nplanes
;
233 for (i
= 0; i
< screenInfo
.numPixmapFormats
; i
++) {
234 if (screenInfo
.formats
[i
].depth
== depth
)
235 return screenInfo
.formats
[i
].bitsPerPixel
;
237 return depth
; /* should never get here, but this should be safe */
239 XMesaDisplay
*dpy
= xmv
->display
;
240 XMesaVisualInfo visinfo
= xmv
->visinfo
;
243 /* Create a temporary XImage */
244 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
245 ZPixmap
, 0, /*format, offset*/
246 (char*) MALLOC(8), /*data*/
247 1, 1, /*width, height*/
252 /* grab the bits/pixel value */
253 bitsPerPixel
= img
->bits_per_pixel
;
254 /* free the XImage */
255 _mesa_free( img
->data
);
257 XMesaDestroyImage( img
);
265 * Determine if a given X window ID is valid (window exists).
266 * Do this by calling XGetWindowAttributes() for the window and
267 * checking if we catch an X error.
268 * Input: dpy - the display
269 * win - the window to check for existance
270 * Return: GL_TRUE - window exists
271 * GL_FALSE - window doesn't exist
273 #ifndef XFree86Server
274 static GLboolean WindowExistsFlag
;
276 static int window_exists_err_handler( XMesaDisplay
* dpy
, XErrorEvent
* xerr
)
279 if (xerr
->error_code
== BadWindow
) {
280 WindowExistsFlag
= GL_FALSE
;
285 static GLboolean
window_exists( XMesaDisplay
*dpy
, Window win
)
287 XWindowAttributes wa
;
288 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
289 WindowExistsFlag
= GL_TRUE
;
290 old_handler
= XSetErrorHandler(window_exists_err_handler
);
291 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
292 XSetErrorHandler(old_handler
);
293 return WindowExistsFlag
;
300 * Return the size of the window (or pixmap) that corresponds to the
302 * \param width returns width in pixels
303 * \param height returns height in pixels
306 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
307 GLuint
*width
, GLuint
*height
)
310 *width
= MIN2(b
->frontxrb
->drawable
->width
, MAX_WIDTH
);
311 *height
= MIN2(b
->frontxrb
->drawable
->height
, MAX_HEIGHT
);
316 unsigned int w
, h
, bw
, depth
;
318 _glthread_LOCK_MUTEX(_xmesa_lock
);
319 XSync(b
->xm_visual
->display
, 0); /* added for Chromium */
320 stat
= XGetGeometry(dpy
, b
->frontxrb
->pixmap
, &root
, &xpos
, &ypos
,
321 &w
, &h
, &bw
, &depth
);
322 _glthread_UNLOCK_MUTEX(_xmesa_lock
);
329 /* probably querying a window that's recently been destroyed */
330 _mesa_warning(NULL
, "XGetGeometry failed!\n");
331 *width
= *height
= 1;
338 /**********************************************************************/
339 /***** Linked list of XMesaBuffers *****/
340 /**********************************************************************/
342 XMesaBuffer XMesaBufferList
= NULL
;
346 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
347 * Note that XMesaBuffer is derived from GLframebuffer.
348 * The new XMesaBuffer will not have any size (Width=Height=0).
350 * \param d the corresponding X drawable (window or pixmap)
351 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
352 * \param vis the buffer's visual
353 * \param cmap the window's colormap, if known.
354 * \return new XMesaBuffer or NULL if any problem
357 create_xmesa_buffer(XMesaDrawable d
, BufferType type
,
358 XMesaVisual vis
, XMesaColormap cmap
)
362 ASSERT(type
== WINDOW
|| type
== PIXMAP
|| type
== PBUFFER
);
364 b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
368 b
->display
= vis
->display
;
373 _mesa_initialize_framebuffer(&b
->mesa_buffer
, &vis
->mesa_visual
);
374 b
->mesa_buffer
.Delete
= xmesa_delete_framebuffer
;
379 b
->frontxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_FALSE
);
384 b
->frontxrb
->Parent
= b
;
385 b
->frontxrb
->drawable
= d
;
386 b
->frontxrb
->pixmap
= (XMesaPixmap
) d
;
387 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_FRONT_LEFT
,
393 if (vis
->mesa_visual
.doubleBufferMode
) {
394 b
->backxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_TRUE
);
396 /* XXX free front xrb too */
400 b
->backxrb
->Parent
= b
;
401 /* determine back buffer implementation */
402 b
->db_mode
= vis
->ximage_flag
? BACK_XIMAGE
: BACK_PIXMAP
;
404 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_BACK_LEFT
,
409 * Software alpha planes
411 if (vis
->mesa_visual
.alphaBits
> 0
412 && vis
->undithered_pf
!= PF_8A8B8G8R
413 && vis
->undithered_pf
!= PF_8A8R8G8B
) {
414 /* Visual has alpha, but pixel format doesn't support it.
415 * We'll use an alpha renderbuffer wrapper.
417 b
->swAlpha
= GL_TRUE
;
420 b
->swAlpha
= GL_FALSE
;
424 * Other renderbuffer (depth, stencil, etc)
426 _mesa_add_soft_renderbuffers(&b
->mesa_buffer
,
427 GL_FALSE
, /* color */
428 vis
->mesa_visual
.haveDepthBuffer
,
429 vis
->mesa_visual
.haveStencilBuffer
,
430 vis
->mesa_visual
.haveAccumBuffer
,
432 vis
->mesa_visual
.numAuxBuffers
> 0 );
434 /* insert buffer into linked list */
435 b
->Next
= XMesaBufferList
;
443 * Find an XMesaBuffer by matching X display and colormap but NOT matching
444 * the notThis buffer.
447 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
)
450 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
451 if (b
->display
==dpy
&& b
->cmap
==cmap
&& b
!=notThis
) {
460 * Remove buffer from linked list, delete if no longer referenced.
463 xmesa_free_buffer(XMesaBuffer buffer
)
465 XMesaBuffer prev
= NULL
, b
;
467 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
469 struct gl_framebuffer
*fb
= &buffer
->mesa_buffer
;
471 /* unlink buffer from list */
473 prev
->Next
= buffer
->Next
;
475 XMesaBufferList
= buffer
->Next
;
477 /* mark as delete pending */
478 fb
->DeletePending
= GL_TRUE
;
480 /* Since the X window for the XMesaBuffer is going away, we don't
481 * want to dereference this pointer in the future.
483 b
->frontxrb
->drawable
= 0;
485 /* Unreference. If count = zero we'll really delete the buffer */
486 _mesa_unreference_framebuffer(&fb
);
490 /* continue search */
493 /* buffer not found in XMesaBufferList */
494 _mesa_problem(NULL
,"xmesa_free_buffer() - buffer not found\n");
499 * Copy X color table stuff from one XMesaBuffer to another.
502 copy_colortable_info(XMesaBuffer dst
, const XMesaBuffer src
)
504 MEMCPY(dst
->color_table
, src
->color_table
, sizeof(src
->color_table
));
505 MEMCPY(dst
->pixel_to_r
, src
->pixel_to_r
, sizeof(src
->pixel_to_r
));
506 MEMCPY(dst
->pixel_to_g
, src
->pixel_to_g
, sizeof(src
->pixel_to_g
));
507 MEMCPY(dst
->pixel_to_b
, src
->pixel_to_b
, sizeof(src
->pixel_to_b
));
508 dst
->num_alloced
= src
->num_alloced
;
509 MEMCPY(dst
->alloced_colors
, src
->alloced_colors
,
510 sizeof(src
->alloced_colors
));
515 /**********************************************************************/
516 /***** Misc Private Functions *****/
517 /**********************************************************************/
521 * A replacement for XAllocColor. This function should never
522 * fail to allocate a color. When XAllocColor fails, we return
523 * the nearest matching color. If we have to allocate many colors
524 * this function isn't too efficient; the XQueryColors() could be
526 * Written by Michael Pichler, Brian Paul, Mark Kilgard
527 * Input: dpy - X display
529 * cmapSize - size of colormap
530 * In/Out: color - the XColor struct
531 * Output: exact - 1=exact color match, 0=closest match
532 * alloced - 1=XAlloc worked, 0=XAlloc failed
535 noFaultXAllocColor( int client
,
540 int *exact
, int *alloced
)
546 /* we'll try to cache ctable for better remote display performance */
547 static Display
*prevDisplay
= NULL
;
548 static XMesaColormap prevCmap
= 0;
549 static int prevCmapSize
= 0;
550 static XMesaColor
*ctable
= NULL
;
554 double mindist
; /* 3*2^16^2 exceeds long int precision. */
558 /* First try just using XAllocColor. */
561 &color
->red
, &color
->green
, &color
->blue
,
565 if (XAllocColor(dpy
, cmap
, color
))
573 /* Alloc failed, search for closest match */
575 /* Retrieve color table entries. */
576 /* XXX alloca candidate. */
578 ppixIn
= (Pixel
*) MALLOC(cmapSize
* sizeof(Pixel
));
579 ctable
= (xrgb
*) MALLOC(cmapSize
* sizeof(xrgb
));
580 for (i
= 0; i
< cmapSize
; i
++) {
583 QueryColors(cmap
, cmapSize
, ppixIn
, ctable
);
585 if (prevDisplay
!= dpy
|| prevCmap
!= cmap
586 || prevCmapSize
!= cmapSize
|| !ctable
) {
587 /* free previously cached color table */
590 /* Get the color table from X */
591 ctable
= (XMesaColor
*) MALLOC(cmapSize
* sizeof(XMesaColor
));
593 for (i
= 0; i
< cmapSize
; i
++) {
596 XQueryColors(dpy
, cmap
, ctable
, cmapSize
);
599 prevCmapSize
= cmapSize
;
603 /* Find best match. */
606 for (i
= 0; i
< cmapSize
; i
++) {
607 double dr
= 0.30 * ((double) color
->red
- (double) ctable
[i
].red
);
608 double dg
= 0.59 * ((double) color
->green
- (double) ctable
[i
].green
);
609 double db
= 0.11 * ((double) color
->blue
- (double) ctable
[i
].blue
);
610 double dist
= dr
* dr
+ dg
* dg
+ db
* db
;
611 if (bestmatch
< 0 || dist
< mindist
) {
618 subColor
.red
= ctable
[bestmatch
].red
;
619 subColor
.green
= ctable
[bestmatch
].green
;
620 subColor
.blue
= ctable
[bestmatch
].blue
;
621 /* Try to allocate the closest match color. This should only
622 * fail if the cell is read/write. Otherwise, we're incrementing
623 * the cell's reference count.
627 &subColor
.red
, &subColor
.green
, &subColor
.blue
,
629 client
) == Success
) {
631 if (XAllocColor(dpy
, cmap
, &subColor
)) {
636 /* do this to work around a problem reported by Frank Ortega */
637 subColor
.pixel
= (unsigned long) bestmatch
;
638 subColor
.red
= ctable
[bestmatch
].red
;
639 subColor
.green
= ctable
[bestmatch
].green
;
640 subColor
.blue
= ctable
[bestmatch
].blue
;
641 subColor
.flags
= DoRed
| DoGreen
| DoBlue
;
648 /* don't free table, save it for next time */
658 * Do setup for PF_GRAYSCALE pixel format.
659 * Note that buffer may be NULL.
662 setup_grayscale(int client
, XMesaVisual v
,
663 XMesaBuffer buffer
, XMesaColormap cmap
)
665 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
670 XMesaBuffer prevBuffer
;
676 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
678 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
679 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
680 /* Copy colormap stuff from previous XMesaBuffer which uses same
681 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
683 copy_colortable_info(buffer
, prevBuffer
);
686 /* Allocate 256 shades of gray */
688 int colorsfailed
= 0;
689 for (gray
=0;gray
<256;gray
++) {
690 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
691 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
692 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
695 xcol
.red
= (r
<< 8) | r
;
696 xcol
.green
= (g
<< 8) | g
;
697 xcol
.blue
= (b
<< 8) | b
;
698 noFaultXAllocColor( client
, v
->display
,
699 cmap
, GET_COLORMAP_SIZE(v
),
700 &xcol
, &exact
, &alloced
);
705 assert(buffer
->num_alloced
<256);
706 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
707 buffer
->num_alloced
++;
712 buffer->color_table[gray*3+0] = xcol.pixel;
713 buffer->color_table[gray*3+1] = xcol.pixel;
714 buffer->color_table[gray*3+2] = xcol.pixel;
715 assert(xcol.pixel < 65536);
716 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
717 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
718 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
720 buffer
->color_table
[gray
] = xcol
.pixel
;
721 assert(xcol
.pixel
< 65536);
722 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
723 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
724 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
727 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
729 "Note: %d out of 256 needed colors do not match exactly.\n",
735 v
->dithered_pf
= PF_Grayscale
;
736 v
->undithered_pf
= PF_Grayscale
;
743 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
744 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
745 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
746 * color. While this function was originally designed just for 8-bit
747 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
748 * Dithering code contributed by Bob Mercier.
751 setup_dithered_color(int client
, XMesaVisual v
,
752 XMesaBuffer buffer
, XMesaColormap cmap
)
754 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
759 XMesaBuffer prevBuffer
;
765 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
767 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
768 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
769 /* Copy colormap stuff from previous, matching XMesaBuffer.
770 * Do this to avoid time spent in noFaultXAllocColor.
772 copy_colortable_info(buffer
, prevBuffer
);
775 /* Allocate X colors and initialize color_table[], red_table[], etc */
777 int colorsfailed
= 0;
778 for (r
= 0; r
< DITH_R
; r
++) {
779 for (g
= 0; g
< DITH_G
; g
++) {
780 for (b
= 0; b
< DITH_B
; b
++) {
783 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(DITH_R
-1),65535);
784 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(DITH_G
-1),65535);
785 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(DITH_B
-1),65535);
786 noFaultXAllocColor( client
, v
->display
,
787 cmap
, GET_COLORMAP_SIZE(v
),
788 &xcol
, &exact
, &alloced
);
793 assert(buffer
->num_alloced
<256);
794 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
795 buffer
->num_alloced
++;
797 i
= DITH_MIX( r
, g
, b
);
799 buffer
->color_table
[i
] = xcol
.pixel
;
800 assert(xcol
.pixel
< 65536);
801 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (DITH_R
-1);
802 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (DITH_G
-1);
803 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (DITH_B
-1);
808 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
810 "Note: %d out of %d needed colors do not match exactly.\n",
811 colorsfailed
, DITH_R
* DITH_G
* DITH_B
);
816 v
->dithered_pf
= PF_Dither
;
817 v
->undithered_pf
= PF_Lookup
;
823 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
824 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
825 * Special dithering tables have to be initialized.
828 setup_8bit_hpcr(XMesaVisual v
)
830 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
831 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
832 * on the root window AND the colormap obtainable by XGetRGBColormaps
833 * for that atom must be set on the window. (see also tkInitWindow)
834 * If that colormap is not set, the output will look stripy.
837 /* Setup color tables with gamma correction */
841 g
= 1.0 / v
->RedGamma
;
842 for (i
=0; i
<256; i
++) {
843 GLint red
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[0][i
]/255.0, g
));
844 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
847 g
= 1.0 / v
->GreenGamma
;
848 for (i
=0; i
<256; i
++) {
849 GLint green
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[1][i
]/255.0, g
));
850 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
853 g
= 1.0 / v
->BlueGamma
;
854 for (i
=0; i
<256; i
++) {
855 GLint blue
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[2][i
]/255.0, g
));
856 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
858 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
859 v
->dithered_pf
= PF_HPCR
;
861 /* which method should I use to clear */
862 /* GL_FALSE: keep the ordinary method */
863 /* GL_TRUE : clear with dither pattern */
864 v
->hpcr_clear_flag
= _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
866 if (v
->hpcr_clear_flag
) {
867 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
868 DefaultRootWindow(v
->display
),
870 #ifndef XFree86Server
871 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
872 0, 0, 16, 2, AllPlanes
, ZPixmap
);
879 * Setup RGB rendering for a window with a True/DirectColor visual.
882 setup_truecolor(XMesaVisual v
, XMesaBuffer buffer
, XMesaColormap cmap
)
884 unsigned long rmask
, gmask
, bmask
;
888 /* Compute red multiplier (mask) and bit shift */
890 rmask
= GET_REDMASK(v
);
891 while ((rmask
& 1)==0) {
896 /* Compute green multiplier (mask) and bit shift */
898 gmask
= GET_GREENMASK(v
);
899 while ((gmask
& 1)==0) {
904 /* Compute blue multiplier (mask) and bit shift */
906 bmask
= GET_BLUEMASK(v
);
907 while ((bmask
& 1)==0) {
913 * Compute component-to-pixel lookup tables and dithering kernel
916 static GLubyte kernel
[16] = {
917 0*16, 8*16, 2*16, 10*16,
918 12*16, 4*16, 14*16, 6*16,
919 3*16, 11*16, 1*16, 9*16,
920 15*16, 7*16, 13*16, 5*16,
922 GLint rBits
= _mesa_bitcount(rmask
);
923 GLint gBits
= _mesa_bitcount(gmask
);
924 GLint bBits
= _mesa_bitcount(bmask
);
928 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
929 for (i
=0; i
<=rmask
; i
++)
930 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
931 for (i
=0; i
<=gmask
; i
++)
932 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
933 for (i
=0; i
<=bmask
; i
++)
934 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
936 /* convert RGB values from [0,255] to pixel components */
938 for (i
=0;i
<256;i
++) {
939 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
940 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
941 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
942 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
943 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
944 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
946 /* overflow protection */
947 for (i
=256;i
<512;i
++) {
948 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
949 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
950 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
953 /* setup dithering kernel */
955 if (gBits
> maxBits
) maxBits
= gBits
;
956 if (bBits
> maxBits
) maxBits
= bBits
;
958 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
961 v
->undithered_pf
= PF_Truecolor
;
962 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_Dither_True
: PF_Truecolor
;
966 * Now check for TrueColor visuals which we can optimize.
968 if ( GET_REDMASK(v
) ==0x0000ff
969 && GET_GREENMASK(v
)==0x00ff00
970 && GET_BLUEMASK(v
) ==0xff0000
971 && CHECK_BYTE_ORDER(v
)
972 && v
->BitsPerPixel
==32
973 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
974 /* common 32 bpp config used on SGI, Sun */
975 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
; /* ABGR */
977 else if (GET_REDMASK(v
) == 0xff0000
978 && GET_GREENMASK(v
)== 0x00ff00
979 && GET_BLUEMASK(v
) == 0x0000ff
980 && CHECK_BYTE_ORDER(v
)
981 && v
->RedGamma
== 1.0 && v
->GreenGamma
== 1.0 && v
->BlueGamma
== 1.0){
982 if (v
->BitsPerPixel
==32) {
983 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
984 if (GET_VISUAL_DEPTH(v
) == 32 && v
->mesa_visual
.alphaBits
== 8)
985 v
->undithered_pf
= v
->dithered_pf
= PF_8A8R8G8B
; /* ARGB */
987 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
; /* xRGB */
989 else if (v
->BitsPerPixel
== 24) {
990 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
; /* RGB */
993 else if (GET_REDMASK(v
) ==0xf800
994 && GET_GREENMASK(v
)==0x07e0
995 && GET_BLUEMASK(v
) ==0x001f
996 && CHECK_BYTE_ORDER(v
)
997 && v
->BitsPerPixel
==16
998 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1000 v
->undithered_pf
= PF_5R6G5B
;
1001 v
->dithered_pf
= PF_Dither_5R6G5B
;
1003 else if (GET_REDMASK(v
) ==0xe0
1004 && GET_GREENMASK(v
)==0x1c
1005 && GET_BLUEMASK(v
) ==0x03
1006 && CHECK_FOR_HPCR(v
)) {
1007 /* 8-bit HP color recovery */
1008 setup_8bit_hpcr( v
);
1015 * Setup RGB rendering for a window with a monochrome visual.
1018 setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
1021 v
->dithered_pf
= v
->undithered_pf
= PF_1Bit
;
1022 /* if black=1 then we must flip pixel values */
1023 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
1029 * When a context is bound for the first time, we can finally finish
1030 * initializing the context's visual and buffer information.
1031 * \param v the XMesaVisual to initialize
1032 * \param b the XMesaBuffer to initialize (may be NULL)
1033 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1034 * \param window the window/pixmap we're rendering into
1035 * \param cmap the colormap associated with the window/pixmap
1036 * \return GL_TRUE=success, GL_FALSE=failure
1039 initialize_visual_and_buffer(int client
, XMesaVisual v
, XMesaBuffer b
,
1040 GLboolean rgb_flag
, XMesaDrawable window
,
1043 ASSERT(!b
|| b
->xm_visual
== v
);
1045 /* Save true bits/pixel */
1046 v
->BitsPerPixel
= bits_per_pixel(v
);
1047 assert(v
->BitsPerPixel
> 0);
1049 if (rgb_flag
== GL_FALSE
) {
1050 /* COLOR-INDEXED WINDOW:
1051 * Even if the visual is TrueColor or DirectColor we treat it as
1052 * being color indexed. This is weird but might be useful to someone.
1054 v
->dithered_pf
= v
->undithered_pf
= PF_Index
;
1055 v
->mesa_visual
.indexBits
= GET_VISUAL_DEPTH(v
);
1059 * We support RGB rendering into almost any kind of visual.
1061 const int xclass
= v
->mesa_visual
.visualType
;
1062 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1063 setup_truecolor( v
, b
, cmap
);
1065 else if (xclass
== GLX_STATIC_GRAY
&& GET_VISUAL_DEPTH(v
) == 1) {
1066 setup_monochrome( v
, b
);
1068 else if (xclass
== GLX_GRAY_SCALE
|| xclass
== GLX_STATIC_GRAY
) {
1069 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1073 else if ((xclass
== GLX_PSEUDO_COLOR
|| xclass
== GLX_STATIC_COLOR
)
1074 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1075 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1080 _mesa_warning(NULL
, "XMesa: RGB mode rendering not supported in given visual.\n");
1083 v
->mesa_visual
.indexBits
= 0;
1085 if (_mesa_getenv("MESA_NO_DITHER")) {
1086 v
->dithered_pf
= v
->undithered_pf
;
1092 * If MESA_INFO env var is set print out some debugging info
1093 * which can help Brian figure out what's going on when a user
1096 if (_mesa_getenv("MESA_INFO")) {
1097 _mesa_printf("X/Mesa visual = %p\n", (void *) v
);
1098 _mesa_printf("X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1099 _mesa_printf("X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1100 _mesa_printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
1101 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1102 _mesa_printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1106 /* Do window-specific initializations */
1108 /* these should have been set in create_xmesa_buffer */
1109 ASSERT(b
->frontxrb
->drawable
== window
);
1110 ASSERT(b
->frontxrb
->pixmap
== (XMesaPixmap
) window
);
1112 /* Setup for single/double buffering */
1113 if (v
->mesa_visual
.doubleBufferMode
) {
1114 /* Double buffered */
1115 b
->shm
= check_for_xshm( v
->display
);
1118 /* X11 graphics contexts */
1119 #ifdef XFree86Server
1120 b
->gc
= CreateScratchGC(v
->display
, window
->depth
);
1122 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1124 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1126 /* cleargc - for glClear() */
1127 #ifdef XFree86Server
1128 b
->cleargc
= CreateScratchGC(v
->display
, window
->depth
);
1130 b
->cleargc
= XCreateGC( v
->display
, window
, 0, NULL
);
1132 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1135 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1136 * Patch contributed by Michael Pichler May 15, 1995.
1138 #ifdef XFree86Server
1139 b
->swapgc
= CreateScratchGC(v
->display
, window
->depth
);
1143 dixChangeGC(NullClient
, b
->swapgc
, GCGraphicsExposures
, v
, NULL
);
1148 gcvalues
.graphics_exposures
= False
;
1149 b
->swapgc
= XCreateGC(v
->display
, window
,
1150 GCGraphicsExposures
, &gcvalues
);
1153 XMesaSetFunction( v
->display
, b
->swapgc
, GXcopy
);
1155 * Set fill style and tile pixmap once for all for HPCR stuff
1156 * (instead of doing it each time in clear_color_HPCR_pixmap())
1157 * Initialize whole stuff
1158 * Patch contributed by Jacques Leroy March 8, 1998.
1160 if (v
->hpcr_clear_flag
&& b
->backxrb
&& b
->backxrb
->pixmap
) {
1162 for (i
= 0; i
< 16; i
++) {
1163 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1164 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1166 XMesaPutImage(b
->display
, (XMesaDrawable
) v
->hpcr_clear_pixmap
,
1167 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1168 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1169 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1172 /* Initialize the row buffer XImage for use in write_color_span() */
1173 #ifdef XFree86Server
1174 b
->rowimage
= XMesaCreateImage(GET_VISUAL_DEPTH(v
), MAX_WIDTH
, 1,
1175 (char *)MALLOC(MAX_WIDTH
*4));
1177 b
->rowimage
= XCreateImage( v
->display
,
1180 ZPixmap
, 0, /*format, offset*/
1181 (char*) MALLOC(MAX_WIDTH
*4), /*data*/
1182 MAX_WIDTH
, 1, /*width, height*/
1184 0 /*bytes_per_line*/ );
1196 * Convert an RGBA color to a pixel value.
1199 xmesa_color_to_pixel(GLcontext
*ctx
,
1200 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1203 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1204 switch (pixelFormat
) {
1210 PACK_TRUECOLOR( p
, r
, g
, b
);
1214 return PACK_8A8B8G8R( r
, g
, b
, a
);
1216 return PACK_8A8R8G8B( r
, g
, b
, a
);
1220 return PACK_8R8G8B( r
, g
, b
);
1222 return PACK_5R6G5B( r
, g
, b
);
1226 return DITHER( 1, 0, r
, g
, b
);
1229 /* 382 = (3*255)/2 */
1230 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1232 return DITHER_HPCR(1, 1, r
, g
, b
);
1236 return LOOKUP( r
, g
, b
);
1239 return GRAY_RGB( r
, g
, b
);
1240 case PF_Dither_True
:
1242 case PF_Dither_5R6G5B
:
1245 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1249 _mesa_problem(ctx
, "Bad pixel format in xmesa_color_to_pixel");
1255 #define NUM_VISUAL_TYPES 6
1258 * Convert an X visual type to a GLX visual type.
1260 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1262 * \return If \c visualType is a valid X visual type, a GLX visual type will
1263 * be returned. Otherwise \c GLX_NONE will be returned.
1266 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1270 xmesa_convert_from_x_visual_type( int visualType
)
1272 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
1273 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
1274 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
1275 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
1278 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
1279 ? glx_visual_types
[ visualType
] : GLX_NONE
;
1283 /**********************************************************************/
1284 /***** Public Functions *****/
1285 /**********************************************************************/
1289 * Create a new X/Mesa visual.
1290 * Input: display - X11 display
1291 * visinfo - an XVisualInfo pointer
1292 * rgb_flag - GL_TRUE = RGB mode,
1293 * GL_FALSE = color index mode
1294 * alpha_flag - alpha buffer requested?
1295 * db_flag - GL_TRUE = double-buffered,
1296 * GL_FALSE = single buffered
1297 * stereo_flag - stereo visual?
1298 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1299 * GL_FALSE = use an off-screen pixmap for back buffer
1300 * depth_size - requested bits/depth values, or zero
1301 * stencil_size - requested bits/stencil values, or zero
1302 * accum_red_size - requested bits/red accum values, or zero
1303 * accum_green_size - requested bits/green accum values, or zero
1304 * accum_blue_size - requested bits/blue accum values, or zero
1305 * accum_alpha_size - requested bits/alpha accum values, or zero
1306 * num_samples - number of samples/pixel if multisampling, or zero
1307 * level - visual level, usually 0
1308 * visualCaveat - ala the GLX extension, usually GLX_NONE
1309 * Return; a new XMesaVisual or 0 if error.
1312 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1313 XMesaVisualInfo visinfo
,
1315 GLboolean alpha_flag
,
1317 GLboolean stereo_flag
,
1318 GLboolean ximage_flag
,
1321 GLint accum_red_size
,
1322 GLint accum_green_size
,
1323 GLint accum_blue_size
,
1324 GLint accum_alpha_size
,
1327 GLint visualCaveat
)
1331 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1333 #ifndef XFree86Server
1334 /* For debugging only */
1335 if (_mesa_getenv("MESA_XSYNC")) {
1336 /* This makes debugging X easier.
1337 * In your debugger, set a breakpoint on _XError to stop when an
1338 * X protocol error is generated.
1340 XSynchronize( display
, 1 );
1344 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1349 v
->display
= display
;
1351 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1352 * the struct but we may need some of the information contained in it
1355 #ifndef XFree86Server
1356 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1361 MEMCPY(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1364 /* check for MESA_GAMMA environment variable */
1365 gamma
= _mesa_getenv("MESA_GAMMA");
1367 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1368 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1369 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1370 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1371 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1374 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1377 v
->ximage_flag
= ximage_flag
;
1379 #ifdef XFree86Server
1380 /* We could calculate these values by ourselves. nplanes is either the sum
1381 * of the red, green, and blue bits or the number index bits.
1382 * ColormapEntries is either (1U << index_bits) or
1383 * (1U << max(redBits, greenBits, blueBits)).
1385 assert(visinfo
->nplanes
> 0);
1386 v
->nplanes
= visinfo
->nplanes
;
1387 v
->ColormapEntries
= visinfo
->ColormapEntries
;
1389 v
->mesa_visual
.redMask
= visinfo
->redMask
;
1390 v
->mesa_visual
.greenMask
= visinfo
->greenMask
;
1391 v
->mesa_visual
.blueMask
= visinfo
->blueMask
;
1392 v
->mesa_visual
.visualID
= visinfo
->vid
;
1393 v
->mesa_visual
.screen
= 0; /* FIXME: What should be done here? */
1395 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
1396 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
1397 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
1398 v
->mesa_visual
.visualID
= visinfo
->visualid
;
1399 v
->mesa_visual
.screen
= visinfo
->screen
;
1402 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1403 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
1405 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
1408 v
->mesa_visual
.visualRating
= visualCaveat
;
1411 v
->mesa_visual
.alphaBits
= 8;
1413 (void) initialize_visual_and_buffer( 0, v
, NULL
, rgb_flag
, 0, 0 );
1416 const int xclass
= v
->mesa_visual
.visualType
;
1417 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1418 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
1419 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
1420 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
1423 /* this is an approximation */
1425 depth
= GET_VISUAL_DEPTH(v
);
1426 red_bits
= depth
/ 3;
1428 green_bits
= depth
/ 2;
1429 depth
-= green_bits
;
1432 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1434 alpha_bits
= v
->mesa_visual
.alphaBits
;
1437 _mesa_initialize_visual( &v
->mesa_visual
,
1438 rgb_flag
, db_flag
, stereo_flag
,
1439 red_bits
, green_bits
,
1440 blue_bits
, alpha_bits
,
1441 v
->mesa_visual
.indexBits
,
1444 accum_red_size
, accum_green_size
,
1445 accum_blue_size
, accum_alpha_size
,
1448 /* XXX minor hack */
1449 v
->mesa_visual
.level
= level
;
1455 void XMesaDestroyVisual( XMesaVisual v
)
1457 #ifndef XFree86Server
1458 _mesa_free(v
->visinfo
);
1466 * Create a new XMesaContext.
1467 * \param v the XMesaVisual
1468 * \param share_list another XMesaContext with which to share display
1469 * lists or NULL if no sharing is wanted.
1470 * \return an XMesaContext or NULL if error.
1473 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1475 static GLboolean firstTime
= GL_TRUE
;
1478 struct dd_function_table functions
;
1482 _glthread_INIT_MUTEX(_xmesa_lock
);
1483 firstTime
= GL_FALSE
;
1486 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1487 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1491 mesaCtx
= &(c
->mesa
);
1493 /* initialize with default driver functions, then plug in XMesa funcs */
1494 _mesa_init_driver_functions(&functions
);
1495 xmesa_init_driver_functions(v
, &functions
);
1496 if (!_mesa_initialize_context(mesaCtx
, &v
->mesa_visual
,
1497 share_list
? &(share_list
->mesa
) : (GLcontext
*) NULL
,
1498 &functions
, (void *) c
)) {
1503 _mesa_enable_sw_extensions(mesaCtx
);
1504 _mesa_enable_1_3_extensions(mesaCtx
);
1505 _mesa_enable_1_4_extensions(mesaCtx
);
1506 _mesa_enable_1_5_extensions(mesaCtx
);
1507 _mesa_enable_2_0_extensions(mesaCtx
);
1508 #if ENABLE_EXT_texure_compression_s3tc
1510 _mesa_enable_extension(mesaCtx
, "GL_EXT_texture_compression_s3tc");
1511 _mesa_enable_extension(mesaCtx
, "GL_S3_s3tc");
1513 _mesa_enable_extension(mesaCtx
, "GL_3DFX_texture_compression_FXT1");
1515 #if ENABLE_EXT_timer_query
1516 _mesa_enable_extension(mesaCtx
, "GL_EXT_timer_query");
1519 #ifdef XFree86Server
1520 /* If we're running in the X server, do bounds checking to prevent
1521 * segfaults and server crashes!
1523 mesaCtx
->Const
.CheckArrayBounds
= GL_TRUE
;
1526 /* finish up xmesa context initializations */
1527 c
->swapbytes
= CHECK_BYTE_ORDER(v
) ? GL_FALSE
: GL_TRUE
;
1529 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1530 c
->display
= v
->display
;
1531 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1533 /* Initialize the software rasterizer and helper modules.
1535 if (!_swrast_CreateContext( mesaCtx
) ||
1536 !_vbo_CreateContext( mesaCtx
) ||
1537 !_tnl_CreateContext( mesaCtx
) ||
1538 !_swsetup_CreateContext( mesaCtx
)) {
1539 _mesa_free_context_data(&c
->mesa
);
1545 tnl
= TNL_CONTEXT(mesaCtx
);
1546 tnl
->Driver
.RunPipeline
= _tnl_run_pipeline
;
1548 xmesa_register_swrast_functions( mesaCtx
);
1549 _swsetup_Wakeup(mesaCtx
);
1557 void XMesaDestroyContext( XMesaContext c
)
1559 GLcontext
*mesaCtx
= &c
->mesa
;
1562 FXdestroyContext( XMESA_BUFFER(mesaCtx
->DrawBuffer
) );
1565 _swsetup_DestroyContext( mesaCtx
);
1566 _swrast_DestroyContext( mesaCtx
);
1567 _tnl_DestroyContext( mesaCtx
);
1568 _vbo_DestroyContext( mesaCtx
);
1569 _mesa_free_context_data( mesaCtx
);
1576 * Private function for creating an XMesaBuffer which corresponds to an
1577 * X window or pixmap.
1578 * \param v the window's XMesaVisual
1579 * \param w the window we're wrapping
1580 * \return new XMesaBuffer or NULL if error
1583 XMesaCreateWindowBuffer(XMesaVisual v
, XMesaWindow w
)
1585 #ifndef XFree86Server
1586 XWindowAttributes attr
;
1595 /* Check that window depth matches visual depth */
1596 #ifdef XFree86Server
1597 client
= CLIENT_ID(((XMesaDrawable
)w
)->id
);
1599 if (GET_VISUAL_DEPTH(v
) != ((XMesaDrawable
)w
)->depth
) {
1600 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1601 GET_VISUAL_DEPTH(v
), ((XMesaDrawable
) w
)->depth
);
1605 XGetWindowAttributes( v
->display
, w
, &attr
);
1607 if (GET_VISUAL_DEPTH(v
) != attr
.depth
) {
1608 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1609 GET_VISUAL_DEPTH(v
), attr
.depth
);
1615 #ifdef XFree86Server
1616 cmap
= (ColormapPtr
)LookupIDByType(wColormap(w
), RT_COLORMAP
);
1618 if (attr
.colormap
) {
1619 cmap
= attr
.colormap
;
1622 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
1623 /* this is weird, a window w/out a colormap!? */
1624 /* OK, let's just allocate a new one and hope for the best */
1625 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1629 b
= create_xmesa_buffer((XMesaDrawable
) w
, WINDOW
, v
, cmap
);
1633 if (!initialize_visual_and_buffer( client
, v
, b
, v
->mesa_visual
.rgbMode
,
1634 (XMesaDrawable
) w
, cmap
)) {
1635 xmesa_free_buffer(b
);
1645 * Create a new XMesaBuffer from an X pixmap.
1647 * \param v the XMesaVisual
1648 * \param p the pixmap
1649 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1650 * \c GLX_DIRECT_COLOR visual for the pixmap
1651 * \returns new XMesaBuffer or NULL if error
1654 XMesaCreatePixmapBuffer(XMesaVisual v
, XMesaPixmap p
, XMesaColormap cmap
)
1661 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1665 #ifdef XFree86Server
1666 client
= CLIENT_ID(((XMesaDrawable
)p
)->id
);
1669 if (!initialize_visual_and_buffer(client
, v
, b
, v
->mesa_visual
.rgbMode
,
1670 (XMesaDrawable
) p
, cmap
)) {
1671 xmesa_free_buffer(b
);
1681 XMesaCreatePBuffer(XMesaVisual v
, XMesaColormap cmap
,
1682 unsigned int width
, unsigned int height
)
1684 #ifdef XFree86Server
1689 XMesaDrawable drawable
; /* X Pixmap Drawable */
1692 /* allocate pixmap for front buffer */
1693 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1694 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1699 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1703 if (!initialize_visual_and_buffer(client
, v
, b
, v
->mesa_visual
.rgbMode
,
1705 xmesa_free_buffer(b
);
1716 * Deallocate an XMesaBuffer structure and all related info.
1719 XMesaDestroyBuffer(XMesaBuffer b
)
1721 xmesa_free_buffer(b
);
1726 * Query the current window size and update the corresponding GLframebuffer
1727 * and all attached renderbuffers.
1729 * 1. the first time a buffer is bound to a context.
1730 * 2. from glViewport to poll for window size changes
1731 * 3. from the XMesaResizeBuffers() API function.
1732 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1733 * when resizing a buffer when no rendering context is bound.
1736 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
)
1738 GLuint width
, height
;
1739 xmesa_get_window_size(drawBuffer
->display
, drawBuffer
, &width
, &height
);
1740 if (drawBuffer
->mesa_buffer
.Width
!= width
||
1741 drawBuffer
->mesa_buffer
.Height
!= height
) {
1742 GLcontext
*ctx
= xmctx
? &xmctx
->mesa
: NULL
;
1743 _mesa_resize_framebuffer(ctx
, &(drawBuffer
->mesa_buffer
), width
, height
);
1745 drawBuffer
->mesa_buffer
.Initialized
= GL_TRUE
; /* XXX TEMPORARY? */
1750 * Bind buffer b to context c and make c the current rendering context.
1752 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
1754 return XMesaMakeCurrent2( c
, b
, b
);
1759 * Bind buffer b to context c and make c the current rendering context.
1762 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1763 XMesaBuffer readBuffer
)
1766 if (!drawBuffer
|| !readBuffer
)
1767 return GL_FALSE
; /* must specify buffers! */
1769 if (&(c
->mesa
) == _mesa_get_current_context()
1770 && c
->mesa
.DrawBuffer
== &drawBuffer
->mesa_buffer
1771 && c
->mesa
.ReadBuffer
== &readBuffer
->mesa_buffer
1772 && XMESA_BUFFER(c
->mesa
.DrawBuffer
)->wasCurrent
) {
1773 /* same context and buffer, do nothing */
1777 c
->xm_buffer
= drawBuffer
;
1780 if (FXmakeCurrent( drawBuffer
))
1784 /* Call this periodically to detect when the user has begun using
1785 * GL rendering from multiple threads.
1787 _glapi_check_multithread();
1789 xmesa_check_and_update_buffer_size(c
, drawBuffer
);
1790 if (readBuffer
!= drawBuffer
)
1791 xmesa_check_and_update_buffer_size(c
, readBuffer
);
1793 _mesa_make_current(&(c
->mesa
),
1794 &drawBuffer
->mesa_buffer
,
1795 &readBuffer
->mesa_buffer
);
1797 if (c
->xm_visual
->mesa_visual
.rgbMode
) {
1799 * Must recompute and set these pixel values because colormap
1800 * can be different for different windows.
1802 c
->clearpixel
= xmesa_color_to_pixel( &c
->mesa
,
1807 c
->xm_visual
->undithered_pf
);
1808 XMesaSetForeground(c
->display
, drawBuffer
->cleargc
, c
->clearpixel
);
1811 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1812 drawBuffer
->wasCurrent
= GL_TRUE
;
1816 _mesa_make_current( NULL
, NULL
, NULL
);
1823 * Unbind the context c from its buffer.
1825 GLboolean
XMesaUnbindContext( XMesaContext c
)
1827 /* A no-op for XFree86 integration purposes */
1832 XMesaContext
XMesaGetCurrentContext( void )
1834 GET_CURRENT_CONTEXT(ctx
);
1836 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1845 XMesaBuffer
XMesaGetCurrentBuffer( void )
1847 GET_CURRENT_CONTEXT(ctx
);
1849 XMesaBuffer xmbuf
= XMESA_BUFFER(ctx
->DrawBuffer
);
1858 /* New in Mesa 3.1 */
1859 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
1861 GET_CURRENT_CONTEXT(ctx
);
1863 return XMESA_BUFFER(ctx
->ReadBuffer
);
1871 #ifdef XFree86Server
1873 GLboolean
XMesaForceCurrent(XMesaContext c
)
1877 _glapi_set_dispatch(c
->mesa
.CurrentDispatch
);
1880 if (&(c
->mesa
) != _mesa_get_current_context()) {
1881 _mesa_make_current(&c
->mesa
, c
->mesa
.DrawBuffer
, c
->mesa
.ReadBuffer
);
1885 _mesa_make_current(NULL
, NULL
, NULL
);
1892 GLboolean
XMesaLoseCurrent(XMesaContext c
)
1895 _mesa_make_current(NULL
, NULL
, NULL
);
1901 GLboolean
XMesaCopyContext( XMesaContext xm_src
, XMesaContext xm_dst
, GLuint mask
)
1903 _mesa_copy_context(&xm_src
->mesa
, &xm_dst
->mesa
, mask
);
1906 #endif /* XFree86Server */
1910 GLboolean
XMesaSetFXmode( GLint mode
)
1920 * Copy the back buffer to the front buffer. If there's no back buffer
1924 void XMesaSwapBuffers( XMesaBuffer b
)
1926 GET_CURRENT_CONTEXT(ctx
);
1929 /* single buffered */
1933 /* If we're swapping the buffer associated with the current context
1934 * we have to flush any pending rendering commands first.
1936 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
1937 _mesa_notifySwapBuffers(ctx
);
1941 if (FXswapBuffers(b
))
1944 if (b
->backxrb
->ximage
) {
1945 /* Copy Ximage (back buf) from client memory to server window */
1946 #if defined(USE_XSHM) && !defined(XFree86Server)
1948 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1949 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
1951 b
->backxrb
->ximage
, 0, 0,
1952 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
1954 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1959 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1960 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
1962 b
->backxrb
->ximage
, 0, 0,
1963 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
);
1964 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1967 else if (b
->backxrb
->pixmap
) {
1968 /* Copy pixmap (back buf) to window (front buf) on server */
1969 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1970 XMesaCopyArea( b
->xm_visual
->display
,
1971 b
->backxrb
->pixmap
, /* source drawable */
1972 b
->frontxrb
->drawable
, /* dest. drawable */
1974 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
1975 0, 0 /* dest region */
1977 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1981 _mesa_copy_soft_alpha_renderbuffers(ctx
, &b
->mesa_buffer
);
1983 #if !defined(XFree86Server)
1984 XSync( b
->xm_visual
->display
, False
);
1991 * Copy sub-region of back buffer to front buffer
1993 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
1995 GET_CURRENT_CONTEXT(ctx
);
1997 /* If we're swapping the buffer associated with the current context
1998 * we have to flush any pending rendering commands first.
2000 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2001 _mesa_notifySwapBuffers(ctx
);
2004 /* single buffered */
2009 int yTop
= b
->mesa_buffer
.Height
- y
- height
;
2011 if (FXswapBuffers(b
))
2014 if (b
->backxrb
->ximage
) {
2015 /* Copy Ximage from host's memory to server's window */
2016 #if defined(USE_XSHM) && !defined(XFree86Server)
2018 /* XXX assuming width and height aren't too large! */
2019 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2021 b
->backxrb
->ximage
, x
, yTop
,
2022 x
, yTop
, width
, height
, False
);
2023 /* wait for finished event??? */
2028 /* XXX assuming width and height aren't too large! */
2029 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2031 b
->backxrb
->ximage
, x
, yTop
,
2032 x
, yTop
, width
, height
);
2036 /* Copy pixmap to window on server */
2037 XMesaCopyArea( b
->xm_visual
->display
,
2038 b
->backxrb
->pixmap
, /* source drawable */
2039 b
->frontxrb
->drawable
, /* dest. drawable */
2041 x
, yTop
, width
, height
, /* source region */
2042 x
, yTop
/* dest region */
2050 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2051 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2052 * back buffer directly.
2053 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2054 * ximage - pointer to back buffer's XImage, or NULL
2055 * Return: GL_TRUE = context is double buffered
2056 * GL_FALSE = context is single buffered
2058 #ifndef XFree86Server
2059 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
2060 XMesaPixmap
*pixmap
,
2061 XMesaImage
**ximage
)
2065 *pixmap
= b
->backxrb
->pixmap
;
2067 *ximage
= b
->backxrb
->ximage
;
2076 #endif /* XFree86Server */
2080 * Return the depth buffer associated with an XMesaBuffer.
2081 * Input: b - the XMesa buffer handle
2082 * Output: width, height - size of buffer in pixels
2083 * bytesPerValue - bytes per depth value (2 or 4)
2084 * buffer - pointer to depth buffer values
2085 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2087 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
2088 GLint
*bytesPerValue
, void **buffer
)
2090 struct gl_renderbuffer
*rb
2091 = b
->mesa_buffer
.Attachment
[BUFFER_DEPTH
].Renderbuffer
;
2092 if (!rb
|| !rb
->Data
) {
2100 *width
= b
->mesa_buffer
.Width
;
2101 *height
= b
->mesa_buffer
.Height
;
2102 *bytesPerValue
= b
->mesa_buffer
.Visual
.depthBits
<= 16
2103 ? sizeof(GLushort
) : sizeof(GLuint
);
2110 void XMesaFlush( XMesaContext c
)
2112 if (c
&& c
->xm_visual
) {
2113 #ifdef XFree86Server
2116 XSync( c
->xm_visual
->display
, False
);
2123 const char *XMesaGetString( XMesaContext c
, int name
)
2126 if (name
==XMESA_VERSION
) {
2129 else if (name
==XMESA_EXTENSIONS
) {
2139 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2142 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2143 if (b
->frontxrb
->drawable
== d
&& b
->display
== dpy
) {
2152 * Free/destroy all XMesaBuffers associated with given display.
2154 void xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
)
2156 XMesaBuffer b
, next
;
2157 for (b
= XMesaBufferList
; b
; b
= next
) {
2159 if (b
->display
== dpy
) {
2160 xmesa_free_buffer(b
);
2167 * Look for XMesaBuffers whose X window has been destroyed.
2168 * Deallocate any such XMesaBuffers.
2170 void XMesaGarbageCollect( void )
2172 XMesaBuffer b
, next
;
2173 for (b
=XMesaBufferList
; b
; b
=next
) {
2175 if (b
->display
&& b
->frontxrb
->drawable
&& b
->type
== WINDOW
) {
2176 #ifdef XFree86Server
2179 XSync(b
->display
, False
);
2180 if (!window_exists( b
->display
, b
->frontxrb
->drawable
)) {
2181 /* found a dead window, free the ancillary info */
2182 XMesaDestroyBuffer( b
);
2190 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2191 GLfloat red
, GLfloat green
,
2192 GLfloat blue
, GLfloat alpha
)
2194 GLcontext
*ctx
= &xmesa
->mesa
;
2195 GLint r
= (GLint
) (red
* 255.0F
);
2196 GLint g
= (GLint
) (green
* 255.0F
);
2197 GLint b
= (GLint
) (blue
* 255.0F
);
2198 GLint a
= (GLint
) (alpha
* 255.0F
);
2200 switch (xmesa
->pixelformat
) {
2206 PACK_TRUECOLOR( p
, r
, g
, b
);
2210 return PACK_8A8B8G8R( r
, g
, b
, a
);
2212 return PACK_8A8R8G8B( r
, g
, b
, a
);
2214 return PACK_8R8G8B( r
, g
, b
);
2216 return PACK_5R6G5B( r
, g
, b
);
2220 return DITHER( x
, y
, r
, g
, b
);
2223 /* 382 = (3*255)/2 */
2224 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2226 return DITHER_HPCR(x
, y
, r
, g
, b
);
2230 return LOOKUP( r
, g
, b
);
2233 return GRAY_RGB( r
, g
, b
);
2234 case PF_Dither_5R6G5B
:
2236 case PF_Dither_True
:
2239 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2243 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");
2250 * This is typically called when the window size changes and we need
2251 * to reallocate the buffer's back/depth/stencil/accum buffers.
2254 XMesaResizeBuffers( XMesaBuffer b
)
2256 GET_CURRENT_CONTEXT(ctx
);
2257 XMesaContext xmctx
= XMESA_CONTEXT(ctx
);
2260 xmesa_check_and_update_buffer_size(xmctx
, b
);