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 static int host_byte_order( void )
164 char *cptr
= (char *) &i
;
165 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
170 * Check if the X Shared Memory extension is available.
171 * Return: 0 = not available
172 * 1 = shared XImage support available
173 * 2 = shared Pixmap support available also
175 static int check_for_xshm( XMesaDisplay
*display
)
177 #if defined(USE_XSHM)
178 int major
, minor
, ignore
;
181 if (XQueryExtension( display
, "MIT-SHM", &ignore
, &ignore
, &ignore
)) {
182 if (XShmQueryVersion( display
, &major
, &minor
, &pixmaps
)==True
) {
183 return (pixmaps
==True
) ? 2 : 1;
193 /* No XSHM support */
200 * Apply gamma correction to an intensity value in [0..max]. Return the
201 * new intensity value.
204 gamma_adjust( GLfloat gamma
, GLint value
, GLint max
)
210 double x
= (double) value
/ (double) max
;
211 return IROUND_POS((GLfloat
) max
* pow(x
, 1.0F
/gamma
));
218 * Return the true number of bits per pixel for XImages.
219 * For example, if we request a 24-bit deep visual we may actually need/get
220 * 32bpp XImages. This function returns the appropriate bpp.
221 * Input: dpy - the X display
222 * visinfo - desribes the visual to be used for XImages
223 * Return: true number of bits per pixel for XImages
226 bits_per_pixel( XMesaVisual xmv
)
228 XMesaDisplay
*dpy
= xmv
->display
;
229 XMesaVisualInfo visinfo
= xmv
->visinfo
;
232 /* Create a temporary XImage */
233 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
234 ZPixmap
, 0, /*format, offset*/
235 (char*) MALLOC(8), /*data*/
236 1, 1, /*width, height*/
241 /* grab the bits/pixel value */
242 bitsPerPixel
= img
->bits_per_pixel
;
243 /* free the XImage */
246 XMesaDestroyImage( img
);
253 * Determine if a given X window ID is valid (window exists).
254 * Do this by calling XGetWindowAttributes() for the window and
255 * checking if we catch an X error.
256 * Input: dpy - the display
257 * win - the window to check for existance
258 * Return: GL_TRUE - window exists
259 * GL_FALSE - window doesn't exist
261 static GLboolean WindowExistsFlag
;
263 static int window_exists_err_handler( XMesaDisplay
* dpy
, XErrorEvent
* xerr
)
266 if (xerr
->error_code
== BadWindow
) {
267 WindowExistsFlag
= GL_FALSE
;
272 static GLboolean
window_exists( XMesaDisplay
*dpy
, Window win
)
274 XWindowAttributes wa
;
275 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
276 WindowExistsFlag
= GL_TRUE
;
277 old_handler
= XSetErrorHandler(window_exists_err_handler
);
278 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
279 XSetErrorHandler(old_handler
);
280 return WindowExistsFlag
;
284 get_drawable_size( XMesaDisplay
*dpy
, Drawable d
, GLuint
*width
, GLuint
*height
)
289 unsigned int w
, h
, bw
, depth
;
290 stat
= XGetGeometry(dpy
, d
, &root
, &xpos
, &ypos
, &w
, &h
, &bw
, &depth
);
298 * Return the size of the window (or pixmap) that corresponds to the
300 * \param width returns width in pixels
301 * \param height returns height in pixels
304 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
305 GLuint
*width
, GLuint
*height
)
309 _glthread_LOCK_MUTEX(_xmesa_lock
);
310 XSync(b
->xm_visual
->display
, 0); /* added for Chromium */
311 stat
= get_drawable_size(dpy
, b
->frontxrb
->pixmap
, width
, height
);
312 _glthread_UNLOCK_MUTEX(_xmesa_lock
);
315 /* probably querying a window that's recently been destroyed */
316 _mesa_warning(NULL
, "XGetGeometry failed!\n");
317 *width
= *height
= 1;
323 /**********************************************************************/
324 /***** Linked list of XMesaBuffers *****/
325 /**********************************************************************/
327 XMesaBuffer XMesaBufferList
= NULL
;
331 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
332 * Note that XMesaBuffer is derived from struct gl_framebuffer.
333 * The new XMesaBuffer will not have any size (Width=Height=0).
335 * \param d the corresponding X drawable (window or pixmap)
336 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
337 * \param vis the buffer's visual
338 * \param cmap the window's colormap, if known.
339 * \return new XMesaBuffer or NULL if any problem
342 create_xmesa_buffer(XMesaDrawable d
, BufferType type
,
343 XMesaVisual vis
, XMesaColormap cmap
)
347 ASSERT(type
== WINDOW
|| type
== PIXMAP
|| type
== PBUFFER
);
349 b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
353 b
->display
= vis
->display
;
358 _mesa_initialize_window_framebuffer(&b
->mesa_buffer
, &vis
->mesa_visual
);
359 b
->mesa_buffer
.Delete
= xmesa_delete_framebuffer
;
364 b
->frontxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_FALSE
);
369 b
->frontxrb
->Parent
= b
;
370 b
->frontxrb
->drawable
= d
;
371 b
->frontxrb
->pixmap
= (XMesaPixmap
) d
;
372 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_FRONT_LEFT
,
378 if (vis
->mesa_visual
.doubleBufferMode
) {
379 b
->backxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_TRUE
);
381 /* XXX free front xrb too */
385 b
->backxrb
->Parent
= b
;
386 /* determine back buffer implementation */
387 b
->db_mode
= vis
->ximage_flag
? BACK_XIMAGE
: BACK_PIXMAP
;
389 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_BACK_LEFT
,
394 * Software alpha planes
396 if (vis
->mesa_visual
.alphaBits
> 0
397 && vis
->undithered_pf
!= PF_8A8B8G8R
398 && vis
->undithered_pf
!= PF_8A8R8G8B
) {
399 /* Visual has alpha, but pixel format doesn't support it.
400 * We'll use an alpha renderbuffer wrapper.
402 b
->swAlpha
= GL_TRUE
;
405 b
->swAlpha
= GL_FALSE
;
409 * Other renderbuffer (depth, stencil, etc)
411 _mesa_add_soft_renderbuffers(&b
->mesa_buffer
,
412 GL_FALSE
, /* color */
413 vis
->mesa_visual
.haveDepthBuffer
,
414 vis
->mesa_visual
.haveStencilBuffer
,
415 vis
->mesa_visual
.haveAccumBuffer
,
417 vis
->mesa_visual
.numAuxBuffers
> 0 );
419 /* GLX_EXT_texture_from_pixmap */
420 b
->TextureTarget
= 0;
421 b
->TextureFormat
= GLX_TEXTURE_FORMAT_NONE_EXT
;
422 b
->TextureMipmap
= 0;
424 /* insert buffer into linked list */
425 b
->Next
= XMesaBufferList
;
433 * Find an XMesaBuffer by matching X display and colormap but NOT matching
434 * the notThis buffer.
437 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
)
440 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
441 if (b
->display
==dpy
&& b
->cmap
==cmap
&& b
!=notThis
) {
450 * Remove buffer from linked list, delete if no longer referenced.
453 xmesa_free_buffer(XMesaBuffer buffer
)
455 XMesaBuffer prev
= NULL
, b
;
457 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
459 struct gl_framebuffer
*fb
= &buffer
->mesa_buffer
;
461 /* unlink buffer from list */
463 prev
->Next
= buffer
->Next
;
465 XMesaBufferList
= buffer
->Next
;
467 /* mark as delete pending */
468 fb
->DeletePending
= GL_TRUE
;
470 /* Since the X window for the XMesaBuffer is going away, we don't
471 * want to dereference this pointer in the future.
473 b
->frontxrb
->drawable
= 0;
475 /* Unreference. If count = zero we'll really delete the buffer */
476 _mesa_reference_framebuffer(&fb
, NULL
);
480 /* continue search */
483 /* buffer not found in XMesaBufferList */
484 _mesa_problem(NULL
,"xmesa_free_buffer() - buffer not found\n");
489 * Copy X color table stuff from one XMesaBuffer to another.
492 copy_colortable_info(XMesaBuffer dst
, const XMesaBuffer src
)
494 memcpy(dst
->color_table
, src
->color_table
, sizeof(src
->color_table
));
495 memcpy(dst
->pixel_to_r
, src
->pixel_to_r
, sizeof(src
->pixel_to_r
));
496 memcpy(dst
->pixel_to_g
, src
->pixel_to_g
, sizeof(src
->pixel_to_g
));
497 memcpy(dst
->pixel_to_b
, src
->pixel_to_b
, sizeof(src
->pixel_to_b
));
498 dst
->num_alloced
= src
->num_alloced
;
499 memcpy(dst
->alloced_colors
, src
->alloced_colors
,
500 sizeof(src
->alloced_colors
));
505 /**********************************************************************/
506 /***** Misc Private Functions *****/
507 /**********************************************************************/
511 * A replacement for XAllocColor. This function should never
512 * fail to allocate a color. When XAllocColor fails, we return
513 * the nearest matching color. If we have to allocate many colors
514 * this function isn't too efficient; the XQueryColors() could be
516 * Written by Michael Pichler, Brian Paul, Mark Kilgard
517 * Input: dpy - X display
519 * cmapSize - size of colormap
520 * In/Out: color - the XColor struct
521 * Output: exact - 1=exact color match, 0=closest match
522 * alloced - 1=XAlloc worked, 0=XAlloc failed
525 noFaultXAllocColor( int client
,
530 int *exact
, int *alloced
)
532 /* we'll try to cache ctable for better remote display performance */
533 static Display
*prevDisplay
= NULL
;
534 static XMesaColormap prevCmap
= 0;
535 static int prevCmapSize
= 0;
536 static XMesaColor
*ctable
= NULL
;
539 double mindist
; /* 3*2^16^2 exceeds long int precision. */
543 /* First try just using XAllocColor. */
544 if (XAllocColor(dpy
, cmap
, color
))
551 /* Alloc failed, search for closest match */
553 /* Retrieve color table entries. */
554 /* XXX alloca candidate. */
555 if (prevDisplay
!= dpy
|| prevCmap
!= cmap
556 || prevCmapSize
!= cmapSize
|| !ctable
) {
557 /* free previously cached color table */
560 /* Get the color table from X */
561 ctable
= (XMesaColor
*) MALLOC(cmapSize
* sizeof(XMesaColor
));
563 for (i
= 0; i
< cmapSize
; i
++) {
566 XQueryColors(dpy
, cmap
, ctable
, cmapSize
);
569 prevCmapSize
= cmapSize
;
572 /* Find best match. */
575 for (i
= 0; i
< cmapSize
; i
++) {
576 double dr
= 0.30 * ((double) color
->red
- (double) ctable
[i
].red
);
577 double dg
= 0.59 * ((double) color
->green
- (double) ctable
[i
].green
);
578 double db
= 0.11 * ((double) color
->blue
- (double) ctable
[i
].blue
);
579 double dist
= dr
* dr
+ dg
* dg
+ db
* db
;
580 if (bestmatch
< 0 || dist
< mindist
) {
587 subColor
.red
= ctable
[bestmatch
].red
;
588 subColor
.green
= ctable
[bestmatch
].green
;
589 subColor
.blue
= ctable
[bestmatch
].blue
;
590 /* Try to allocate the closest match color. This should only
591 * fail if the cell is read/write. Otherwise, we're incrementing
592 * the cell's reference count.
594 if (XAllocColor(dpy
, cmap
, &subColor
)) {
598 /* do this to work around a problem reported by Frank Ortega */
599 subColor
.pixel
= (unsigned long) bestmatch
;
600 subColor
.red
= ctable
[bestmatch
].red
;
601 subColor
.green
= ctable
[bestmatch
].green
;
602 subColor
.blue
= ctable
[bestmatch
].blue
;
603 subColor
.flags
= DoRed
| DoGreen
| DoBlue
;
606 /* don't free table, save it for next time */
615 * Do setup for PF_GRAYSCALE pixel format.
616 * Note that buffer may be NULL.
619 setup_grayscale(int client
, XMesaVisual v
,
620 XMesaBuffer buffer
, XMesaColormap cmap
)
622 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
627 XMesaBuffer prevBuffer
;
633 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
635 /* Copy colormap stuff from previous XMesaBuffer which uses same
636 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
638 copy_colortable_info(buffer
, prevBuffer
);
641 /* Allocate 256 shades of gray */
643 int colorsfailed
= 0;
644 for (gray
=0;gray
<256;gray
++) {
645 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
646 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
647 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
650 xcol
.red
= (r
<< 8) | r
;
651 xcol
.green
= (g
<< 8) | g
;
652 xcol
.blue
= (b
<< 8) | b
;
653 noFaultXAllocColor( client
, v
->display
,
654 cmap
, GET_COLORMAP_SIZE(v
),
655 &xcol
, &exact
, &alloced
);
660 assert(buffer
->num_alloced
<256);
661 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
662 buffer
->num_alloced
++;
667 buffer->color_table[gray*3+0] = xcol.pixel;
668 buffer->color_table[gray*3+1] = xcol.pixel;
669 buffer->color_table[gray*3+2] = xcol.pixel;
670 assert(xcol.pixel < 65536);
671 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
672 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
673 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
675 buffer
->color_table
[gray
] = xcol
.pixel
;
676 assert(xcol
.pixel
< 65536);
677 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
678 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
679 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
682 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
684 "Note: %d out of 256 needed colors do not match exactly.\n",
690 v
->dithered_pf
= PF_Grayscale
;
691 v
->undithered_pf
= PF_Grayscale
;
698 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
699 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
700 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
701 * color. While this function was originally designed just for 8-bit
702 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
703 * Dithering code contributed by Bob Mercier.
706 setup_dithered_color(int client
, XMesaVisual v
,
707 XMesaBuffer buffer
, XMesaColormap cmap
)
709 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
714 XMesaBuffer prevBuffer
;
720 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
722 /* Copy colormap stuff from previous, matching XMesaBuffer.
723 * Do this to avoid time spent in noFaultXAllocColor.
725 copy_colortable_info(buffer
, prevBuffer
);
728 /* Allocate X colors and initialize color_table[], red_table[], etc */
730 int colorsfailed
= 0;
731 for (r
= 0; r
< DITH_R
; r
++) {
732 for (g
= 0; g
< DITH_G
; g
++) {
733 for (b
= 0; b
< DITH_B
; b
++) {
736 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(DITH_R
-1),65535);
737 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(DITH_G
-1),65535);
738 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(DITH_B
-1),65535);
739 noFaultXAllocColor( client
, v
->display
,
740 cmap
, GET_COLORMAP_SIZE(v
),
741 &xcol
, &exact
, &alloced
);
746 assert(buffer
->num_alloced
<256);
747 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
748 buffer
->num_alloced
++;
750 i
= DITH_MIX( r
, g
, b
);
752 buffer
->color_table
[i
] = xcol
.pixel
;
753 assert(xcol
.pixel
< 65536);
754 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (DITH_R
-1);
755 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (DITH_G
-1);
756 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (DITH_B
-1);
761 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
763 "Note: %d out of %d needed colors do not match exactly.\n",
764 colorsfailed
, DITH_R
* DITH_G
* DITH_B
);
769 v
->dithered_pf
= PF_Dither
;
770 v
->undithered_pf
= PF_Lookup
;
776 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
777 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
778 * Special dithering tables have to be initialized.
781 setup_8bit_hpcr(XMesaVisual v
)
783 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
784 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
785 * on the root window AND the colormap obtainable by XGetRGBColormaps
786 * for that atom must be set on the window. (see also tkInitWindow)
787 * If that colormap is not set, the output will look stripy.
790 /* Setup color tables with gamma correction */
794 g
= 1.0 / v
->RedGamma
;
795 for (i
=0; i
<256; i
++) {
796 GLint red
= IROUND_POS(255.0 * pow( hpcr_rgbTbl
[0][i
]/255.0, g
));
797 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
800 g
= 1.0 / v
->GreenGamma
;
801 for (i
=0; i
<256; i
++) {
802 GLint green
= IROUND_POS(255.0 * pow( hpcr_rgbTbl
[1][i
]/255.0, g
));
803 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
806 g
= 1.0 / v
->BlueGamma
;
807 for (i
=0; i
<256; i
++) {
808 GLint blue
= IROUND_POS(255.0 * pow( hpcr_rgbTbl
[2][i
]/255.0, g
));
809 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
811 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
812 v
->dithered_pf
= PF_HPCR
;
814 /* which method should I use to clear */
815 /* GL_FALSE: keep the ordinary method */
816 /* GL_TRUE : clear with dither pattern */
817 v
->hpcr_clear_flag
= _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
819 if (v
->hpcr_clear_flag
) {
820 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
821 DefaultRootWindow(v
->display
),
823 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
824 0, 0, 16, 2, AllPlanes
, ZPixmap
);
830 * Setup RGB rendering for a window with a True/DirectColor visual.
833 setup_truecolor(XMesaVisual v
, XMesaBuffer buffer
, XMesaColormap cmap
)
835 unsigned long rmask
, gmask
, bmask
;
839 /* Compute red multiplier (mask) and bit shift */
841 rmask
= GET_REDMASK(v
);
842 while ((rmask
& 1)==0) {
847 /* Compute green multiplier (mask) and bit shift */
849 gmask
= GET_GREENMASK(v
);
850 while ((gmask
& 1)==0) {
855 /* Compute blue multiplier (mask) and bit shift */
857 bmask
= GET_BLUEMASK(v
);
858 while ((bmask
& 1)==0) {
864 * Compute component-to-pixel lookup tables and dithering kernel
867 static GLubyte kernel
[16] = {
868 0*16, 8*16, 2*16, 10*16,
869 12*16, 4*16, 14*16, 6*16,
870 3*16, 11*16, 1*16, 9*16,
871 15*16, 7*16, 13*16, 5*16,
873 GLint rBits
= _mesa_bitcount(rmask
);
874 GLint gBits
= _mesa_bitcount(gmask
);
875 GLint bBits
= _mesa_bitcount(bmask
);
879 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
880 for (i
=0; i
<=rmask
; i
++)
881 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
882 for (i
=0; i
<=gmask
; i
++)
883 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
884 for (i
=0; i
<=bmask
; i
++)
885 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
887 /* convert RGB values from [0,255] to pixel components */
889 for (i
=0;i
<256;i
++) {
890 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
891 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
892 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
893 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
894 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
895 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
897 /* overflow protection */
898 for (i
=256;i
<512;i
++) {
899 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
900 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
901 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
904 /* setup dithering kernel */
906 if (gBits
> maxBits
) maxBits
= gBits
;
907 if (bBits
> maxBits
) maxBits
= bBits
;
909 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
912 v
->undithered_pf
= PF_Truecolor
;
913 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_Dither_True
: PF_Truecolor
;
917 * Now check for TrueColor visuals which we can optimize.
919 if ( GET_REDMASK(v
) ==0x0000ff
920 && GET_GREENMASK(v
)==0x00ff00
921 && GET_BLUEMASK(v
) ==0xff0000
922 && CHECK_BYTE_ORDER(v
)
923 && v
->BitsPerPixel
==32
924 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
925 /* common 32 bpp config used on SGI, Sun */
926 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
; /* ABGR */
928 else if (GET_REDMASK(v
) == 0xff0000
929 && GET_GREENMASK(v
)== 0x00ff00
930 && GET_BLUEMASK(v
) == 0x0000ff
931 && CHECK_BYTE_ORDER(v
)
932 && v
->RedGamma
== 1.0 && v
->GreenGamma
== 1.0 && v
->BlueGamma
== 1.0){
933 if (v
->BitsPerPixel
==32) {
934 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
935 if (GET_VISUAL_DEPTH(v
) == 32 && v
->mesa_visual
.alphaBits
== 8)
936 v
->undithered_pf
= v
->dithered_pf
= PF_8A8R8G8B
; /* ARGB */
938 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
; /* xRGB */
940 else if (v
->BitsPerPixel
== 24) {
941 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
; /* RGB */
944 else if (GET_REDMASK(v
) ==0xf800
945 && GET_GREENMASK(v
)==0x07e0
946 && GET_BLUEMASK(v
) ==0x001f
947 && CHECK_BYTE_ORDER(v
)
948 && v
->BitsPerPixel
==16
949 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
951 v
->undithered_pf
= PF_5R6G5B
;
952 v
->dithered_pf
= PF_Dither_5R6G5B
;
954 else if (GET_REDMASK(v
) ==0xe0
955 && GET_GREENMASK(v
)==0x1c
956 && GET_BLUEMASK(v
) ==0x03
957 && CHECK_FOR_HPCR(v
)) {
958 /* 8-bit HP color recovery */
959 setup_8bit_hpcr( v
);
966 * Setup RGB rendering for a window with a monochrome visual.
969 setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
972 v
->dithered_pf
= v
->undithered_pf
= PF_1Bit
;
973 /* if black=1 then we must flip pixel values */
974 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
980 * When a context is bound for the first time, we can finally finish
981 * initializing the context's visual and buffer information.
982 * \param v the XMesaVisual to initialize
983 * \param b the XMesaBuffer to initialize (may be NULL)
984 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
985 * \param window the window/pixmap we're rendering into
986 * \param cmap the colormap associated with the window/pixmap
987 * \return GL_TRUE=success, GL_FALSE=failure
990 initialize_visual_and_buffer(XMesaVisual v
, XMesaBuffer b
,
991 XMesaDrawable window
,
995 const int xclass
= v
->visualType
;
998 ASSERT(!b
|| b
->xm_visual
== v
);
1000 /* Save true bits/pixel */
1001 v
->BitsPerPixel
= bits_per_pixel(v
);
1002 assert(v
->BitsPerPixel
> 0);
1005 * We support RGB rendering into almost any kind of visual.
1007 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1008 setup_truecolor( v
, b
, cmap
);
1010 else if (xclass
== GLX_STATIC_GRAY
&& GET_VISUAL_DEPTH(v
) == 1) {
1011 setup_monochrome( v
, b
);
1013 else if (xclass
== GLX_GRAY_SCALE
|| xclass
== GLX_STATIC_GRAY
) {
1014 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1018 else if ((xclass
== GLX_PSEUDO_COLOR
|| xclass
== GLX_STATIC_COLOR
)
1019 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1020 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1025 _mesa_warning(NULL
, "XMesa: RGB mode rendering not supported in given visual.\n");
1028 v
->mesa_visual
.indexBits
= 0;
1030 if (_mesa_getenv("MESA_NO_DITHER")) {
1031 v
->dithered_pf
= v
->undithered_pf
;
1036 * If MESA_INFO env var is set print out some debugging info
1037 * which can help Brian figure out what's going on when a user
1040 if (_mesa_getenv("MESA_INFO")) {
1041 printf("X/Mesa visual = %p\n", (void *) v
);
1042 printf("X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1043 printf("X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1044 printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
1045 printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1046 printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1052 /* Do window-specific initializations */
1054 /* these should have been set in create_xmesa_buffer */
1055 ASSERT(b
->frontxrb
->drawable
== window
);
1056 ASSERT(b
->frontxrb
->pixmap
== (XMesaPixmap
) window
);
1058 /* Setup for single/double buffering */
1059 if (v
->mesa_visual
.doubleBufferMode
) {
1060 /* Double buffered */
1061 b
->shm
= check_for_xshm( v
->display
);
1064 /* X11 graphics contexts */
1065 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1066 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1068 /* cleargc - for glClear() */
1069 b
->cleargc
= XCreateGC( v
->display
, window
, 0, NULL
);
1070 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1073 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1074 * Patch contributed by Michael Pichler May 15, 1995.
1078 gcvalues
.graphics_exposures
= False
;
1079 b
->swapgc
= XCreateGC(v
->display
, window
,
1080 GCGraphicsExposures
, &gcvalues
);
1082 XMesaSetFunction( v
->display
, b
->swapgc
, GXcopy
);
1084 * Set fill style and tile pixmap once for all for HPCR stuff
1085 * (instead of doing it each time in clear_color_HPCR_pixmap())
1086 * Initialize whole stuff
1087 * Patch contributed by Jacques Leroy March 8, 1998.
1089 if (v
->hpcr_clear_flag
&& b
->backxrb
&& b
->backxrb
->pixmap
) {
1091 for (i
= 0; i
< 16; i
++) {
1092 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1093 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1095 XMesaPutImage(b
->display
, (XMesaDrawable
) v
->hpcr_clear_pixmap
,
1096 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1097 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1098 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1101 /* Initialize the row buffer XImage for use in write_color_span() */
1102 data
= (char*) MALLOC(MAX_WIDTH
*4);
1103 b
->rowimage
= XCreateImage( v
->display
,
1106 ZPixmap
, 0, /*format, offset*/
1108 MAX_WIDTH
, 1, /*width, height*/
1110 0 /*bytes_per_line*/ );
1121 * Convert an RGBA color to a pixel value.
1124 xmesa_color_to_pixel(struct gl_context
*ctx
,
1125 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1128 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1129 switch (pixelFormat
) {
1135 PACK_TRUECOLOR( p
, r
, g
, b
);
1139 return PACK_8A8B8G8R( r
, g
, b
, a
);
1141 return PACK_8A8R8G8B( r
, g
, b
, a
);
1145 return PACK_8R8G8B( r
, g
, b
);
1147 return PACK_5R6G5B( r
, g
, b
);
1151 return DITHER( 1, 0, r
, g
, b
);
1154 /* 382 = (3*255)/2 */
1155 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1157 return DITHER_HPCR(1, 1, r
, g
, b
);
1161 return LOOKUP( r
, g
, b
);
1164 return GRAY_RGB( r
, g
, b
);
1165 case PF_Dither_True
:
1167 case PF_Dither_5R6G5B
:
1170 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1174 _mesa_problem(ctx
, "Bad pixel format in xmesa_color_to_pixel");
1180 #define NUM_VISUAL_TYPES 6
1183 * Convert an X visual type to a GLX visual type.
1185 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1187 * \return If \c visualType is a valid X visual type, a GLX visual type will
1188 * be returned. Otherwise \c GLX_NONE will be returned.
1191 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1195 xmesa_convert_from_x_visual_type( int visualType
)
1197 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
1198 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
1199 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
1200 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
1203 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
1204 ? glx_visual_types
[ visualType
] : GLX_NONE
;
1208 /**********************************************************************/
1209 /***** Public Functions *****/
1210 /**********************************************************************/
1214 * Create a new X/Mesa visual.
1215 * Input: display - X11 display
1216 * visinfo - an XVisualInfo pointer
1217 * rgb_flag - GL_TRUE = RGB mode,
1218 * GL_FALSE = color index mode
1219 * alpha_flag - alpha buffer requested?
1220 * db_flag - GL_TRUE = double-buffered,
1221 * GL_FALSE = single buffered
1222 * stereo_flag - stereo visual?
1223 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1224 * GL_FALSE = use an off-screen pixmap for back buffer
1225 * depth_size - requested bits/depth values, or zero
1226 * stencil_size - requested bits/stencil values, or zero
1227 * accum_red_size - requested bits/red accum values, or zero
1228 * accum_green_size - requested bits/green accum values, or zero
1229 * accum_blue_size - requested bits/blue accum values, or zero
1230 * accum_alpha_size - requested bits/alpha accum values, or zero
1231 * num_samples - number of samples/pixel if multisampling, or zero
1232 * level - visual level, usually 0
1233 * visualCaveat - ala the GLX extension, usually GLX_NONE
1234 * Return; a new XMesaVisual or 0 if error.
1237 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1238 XMesaVisualInfo visinfo
,
1240 GLboolean alpha_flag
,
1242 GLboolean stereo_flag
,
1243 GLboolean ximage_flag
,
1246 GLint accum_red_size
,
1247 GLint accum_green_size
,
1248 GLint accum_blue_size
,
1249 GLint accum_alpha_size
,
1252 GLint visualCaveat
)
1256 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1258 /* For debugging only */
1259 if (_mesa_getenv("MESA_XSYNC")) {
1260 /* This makes debugging X easier.
1261 * In your debugger, set a breakpoint on _XError to stop when an
1262 * X protocol error is generated.
1264 XSynchronize( display
, 1 );
1267 /* Color-index rendering not supported. */
1271 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1276 v
->display
= display
;
1278 /* Save a copy of the XVisualInfo struct because the user may Xfree()
1279 * the struct but we may need some of the information contained in it
1282 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1287 memcpy(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1289 /* check for MESA_GAMMA environment variable */
1290 gamma
= _mesa_getenv("MESA_GAMMA");
1292 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1293 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1294 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1295 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1296 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1299 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1302 v
->ximage_flag
= ximage_flag
;
1304 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
1305 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
1306 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
1307 v
->visualID
= visinfo
->visualid
;
1308 v
->screen
= visinfo
->screen
;
1310 #if !(defined(__cplusplus) || defined(c_plusplus))
1311 v
->visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
1313 v
->visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
1316 v
->mesa_visual
.visualRating
= visualCaveat
;
1319 v
->mesa_visual
.alphaBits
= 8;
1321 (void) initialize_visual_and_buffer( v
, NULL
, 0, 0 );
1324 const int xclass
= v
->visualType
;
1325 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1326 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
1327 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
1328 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
1331 /* this is an approximation */
1333 depth
= GET_VISUAL_DEPTH(v
);
1334 red_bits
= depth
/ 3;
1336 green_bits
= depth
/ 2;
1337 depth
-= green_bits
;
1340 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1342 alpha_bits
= v
->mesa_visual
.alphaBits
;
1345 _mesa_initialize_visual( &v
->mesa_visual
,
1346 db_flag
, stereo_flag
,
1347 red_bits
, green_bits
,
1348 blue_bits
, alpha_bits
,
1351 accum_red_size
, accum_green_size
,
1352 accum_blue_size
, accum_alpha_size
,
1355 /* XXX minor hack */
1356 v
->mesa_visual
.level
= level
;
1362 void XMesaDestroyVisual( XMesaVisual v
)
1371 * Create a new XMesaContext.
1372 * \param v the XMesaVisual
1373 * \param share_list another XMesaContext with which to share display
1374 * lists or NULL if no sharing is wanted.
1375 * \return an XMesaContext or NULL if error.
1378 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1380 static GLboolean firstTime
= GL_TRUE
;
1382 struct gl_context
*mesaCtx
;
1383 struct dd_function_table functions
;
1387 _glthread_INIT_MUTEX(_xmesa_lock
);
1388 firstTime
= GL_FALSE
;
1391 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
1392 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1396 mesaCtx
= &(c
->mesa
);
1398 /* initialize with default driver functions, then plug in XMesa funcs */
1399 _mesa_init_driver_functions(&functions
);
1400 xmesa_init_driver_functions(v
, &functions
);
1401 if (!_mesa_initialize_context(mesaCtx
, &v
->mesa_visual
,
1402 share_list
? &(share_list
->mesa
) : (struct gl_context
*) NULL
,
1403 &functions
, (void *) c
)) {
1408 /* Enable this to exercise fixed function -> shader translation
1409 * with software rendering.
1412 mesaCtx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1413 mesaCtx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1416 _mesa_enable_sw_extensions(mesaCtx
);
1417 _mesa_enable_1_3_extensions(mesaCtx
);
1418 _mesa_enable_1_4_extensions(mesaCtx
);
1419 _mesa_enable_1_5_extensions(mesaCtx
);
1420 _mesa_enable_2_0_extensions(mesaCtx
);
1421 _mesa_enable_2_1_extensions(mesaCtx
);
1422 #if ENABLE_EXT_texure_compression_s3tc
1423 if (mesaCtx
->Mesa_DXTn
) {
1424 _mesa_enable_extension(mesaCtx
, "GL_EXT_texture_compression_s3tc");
1425 _mesa_enable_extension(mesaCtx
, "GL_S3_s3tc");
1427 _mesa_enable_extension(mesaCtx
, "GL_3DFX_texture_compression_FXT1");
1429 #if ENABLE_EXT_timer_query
1430 _mesa_enable_extension(mesaCtx
, "GL_EXT_timer_query");
1434 /* finish up xmesa context initializations */
1435 c
->swapbytes
= CHECK_BYTE_ORDER(v
) ? GL_FALSE
: GL_TRUE
;
1437 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1438 c
->display
= v
->display
;
1439 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1441 /* Initialize the software rasterizer and helper modules.
1443 if (!_swrast_CreateContext( mesaCtx
) ||
1444 !_vbo_CreateContext( mesaCtx
) ||
1445 !_tnl_CreateContext( mesaCtx
) ||
1446 !_swsetup_CreateContext( mesaCtx
)) {
1447 _mesa_free_context_data(&c
->mesa
);
1453 tnl
= TNL_CONTEXT(mesaCtx
);
1454 tnl
->Driver
.RunPipeline
= _tnl_run_pipeline
;
1456 xmesa_register_swrast_functions( mesaCtx
);
1457 _swsetup_Wakeup(mesaCtx
);
1459 _mesa_meta_init(mesaCtx
);
1467 void XMesaDestroyContext( XMesaContext c
)
1469 struct gl_context
*mesaCtx
= &c
->mesa
;
1472 FXdestroyContext( XMESA_BUFFER(mesaCtx
->DrawBuffer
) );
1475 _mesa_meta_free( mesaCtx
);
1477 _swsetup_DestroyContext( mesaCtx
);
1478 _swrast_DestroyContext( mesaCtx
);
1479 _tnl_DestroyContext( mesaCtx
);
1480 _vbo_DestroyContext( mesaCtx
);
1481 _mesa_free_context_data( mesaCtx
);
1488 * Private function for creating an XMesaBuffer which corresponds to an
1489 * X window or pixmap.
1490 * \param v the window's XMesaVisual
1491 * \param w the window we're wrapping
1492 * \return new XMesaBuffer or NULL if error
1495 XMesaCreateWindowBuffer(XMesaVisual v
, XMesaWindow w
)
1497 XWindowAttributes attr
;
1505 /* Check that window depth matches visual depth */
1506 XGetWindowAttributes( v
->display
, w
, &attr
);
1508 if (GET_VISUAL_DEPTH(v
) != depth
) {
1509 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1510 GET_VISUAL_DEPTH(v
), depth
);
1515 if (attr
.colormap
) {
1516 cmap
= attr
.colormap
;
1519 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
1520 /* this is weird, a window w/out a colormap!? */
1521 /* OK, let's just allocate a new one and hope for the best */
1522 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1525 b
= create_xmesa_buffer((XMesaDrawable
) w
, WINDOW
, v
, cmap
);
1529 if (!initialize_visual_and_buffer( v
, b
, (XMesaDrawable
) w
, cmap
)) {
1530 xmesa_free_buffer(b
);
1540 * Create a new XMesaBuffer from an X pixmap.
1542 * \param v the XMesaVisual
1543 * \param p the pixmap
1544 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1545 * \c GLX_DIRECT_COLOR visual for the pixmap
1546 * \returns new XMesaBuffer or NULL if error
1549 XMesaCreatePixmapBuffer(XMesaVisual v
, XMesaPixmap p
, XMesaColormap cmap
)
1555 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1559 if (!initialize_visual_and_buffer(v
, b
, (XMesaDrawable
) p
, cmap
)) {
1560 xmesa_free_buffer(b
);
1569 * For GLX_EXT_texture_from_pixmap
1572 XMesaCreatePixmapTextureBuffer(XMesaVisual v
, XMesaPixmap p
,
1574 int format
, int target
, int mipmap
)
1576 GET_CURRENT_CONTEXT(ctx
);
1578 GLuint width
, height
;
1582 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1586 /* get pixmap size, update framebuffer/renderbuffer dims */
1587 xmesa_get_window_size(v
->display
, b
, &width
, &height
);
1588 _mesa_resize_framebuffer(NULL
, &(b
->mesa_buffer
), width
, height
);
1592 if (ctx
->Extensions
.ARB_texture_non_power_of_two
) {
1593 target
= GLX_TEXTURE_2D_EXT
;
1595 else if ( _mesa_bitcount(width
) == 1
1596 && _mesa_bitcount(height
) == 1) {
1597 /* power of two size */
1599 target
= GLX_TEXTURE_1D_EXT
;
1602 target
= GLX_TEXTURE_2D_EXT
;
1605 else if (ctx
->Extensions
.NV_texture_rectangle
) {
1606 target
= GLX_TEXTURE_RECTANGLE_EXT
;
1609 /* non power of two textures not supported */
1610 XMesaDestroyBuffer(b
);
1615 b
->TextureTarget
= target
;
1616 b
->TextureFormat
= format
;
1617 b
->TextureMipmap
= mipmap
;
1619 if (!initialize_visual_and_buffer(v
, b
, (XMesaDrawable
) p
, cmap
)) {
1620 xmesa_free_buffer(b
);
1630 XMesaCreatePBuffer(XMesaVisual v
, XMesaColormap cmap
,
1631 unsigned int width
, unsigned int height
)
1634 XMesaDrawable drawable
; /* X Pixmap Drawable */
1637 /* allocate pixmap for front buffer */
1638 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1639 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1644 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1648 if (!initialize_visual_and_buffer(v
, b
, drawable
, cmap
)) {
1649 xmesa_free_buffer(b
);
1659 * Deallocate an XMesaBuffer structure and all related info.
1662 XMesaDestroyBuffer(XMesaBuffer b
)
1664 xmesa_free_buffer(b
);
1669 * Query the current window size and update the corresponding struct gl_framebuffer
1670 * and all attached renderbuffers.
1672 * 1. the first time a buffer is bound to a context.
1673 * 2. from glViewport to poll for window size changes
1674 * 3. from the XMesaResizeBuffers() API function.
1675 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1676 * when resizing a buffer when no rendering context is bound.
1679 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
)
1681 GLuint width
, height
;
1682 xmesa_get_window_size(drawBuffer
->display
, drawBuffer
, &width
, &height
);
1683 if (drawBuffer
->mesa_buffer
.Width
!= width
||
1684 drawBuffer
->mesa_buffer
.Height
!= height
) {
1685 struct gl_context
*ctx
= xmctx
? &xmctx
->mesa
: NULL
;
1686 _mesa_resize_framebuffer(ctx
, &(drawBuffer
->mesa_buffer
), width
, height
);
1688 drawBuffer
->mesa_buffer
.Initialized
= GL_TRUE
; /* XXX TEMPORARY? */
1693 * Bind buffer b to context c and make c the current rendering context.
1695 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
1697 return XMesaMakeCurrent2( c
, b
, b
);
1702 * Bind buffer b to context c and make c the current rendering context.
1705 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1706 XMesaBuffer readBuffer
)
1709 if (!drawBuffer
|| !readBuffer
)
1710 return GL_FALSE
; /* must specify buffers! */
1712 if (&(c
->mesa
) == _mesa_get_current_context()
1713 && c
->mesa
.DrawBuffer
== &drawBuffer
->mesa_buffer
1714 && c
->mesa
.ReadBuffer
== &readBuffer
->mesa_buffer
1715 && XMESA_BUFFER(c
->mesa
.DrawBuffer
)->wasCurrent
) {
1716 /* same context and buffer, do nothing */
1720 c
->xm_buffer
= drawBuffer
;
1723 if (FXmakeCurrent( drawBuffer
))
1727 /* Call this periodically to detect when the user has begun using
1728 * GL rendering from multiple threads.
1730 _glapi_check_multithread();
1732 xmesa_check_and_update_buffer_size(c
, drawBuffer
);
1733 if (readBuffer
!= drawBuffer
)
1734 xmesa_check_and_update_buffer_size(c
, readBuffer
);
1736 _mesa_make_current(&(c
->mesa
),
1737 &drawBuffer
->mesa_buffer
,
1738 &readBuffer
->mesa_buffer
);
1741 * Must recompute and set these pixel values because colormap
1742 * can be different for different windows.
1744 c
->clearpixel
= xmesa_color_to_pixel( &c
->mesa
,
1749 c
->xm_visual
->undithered_pf
);
1750 XMesaSetForeground(c
->display
, drawBuffer
->cleargc
, c
->clearpixel
);
1752 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1753 drawBuffer
->wasCurrent
= GL_TRUE
;
1757 _mesa_make_current( NULL
, NULL
, NULL
);
1764 * Unbind the context c from its buffer.
1766 GLboolean
XMesaUnbindContext( XMesaContext c
)
1768 /* A no-op for XFree86 integration purposes */
1773 XMesaContext
XMesaGetCurrentContext( void )
1775 GET_CURRENT_CONTEXT(ctx
);
1777 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1786 XMesaBuffer
XMesaGetCurrentBuffer( void )
1788 GET_CURRENT_CONTEXT(ctx
);
1790 XMesaBuffer xmbuf
= XMESA_BUFFER(ctx
->DrawBuffer
);
1799 /* New in Mesa 3.1 */
1800 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
1802 GET_CURRENT_CONTEXT(ctx
);
1804 return XMESA_BUFFER(ctx
->ReadBuffer
);
1815 GLboolean
XMesaSetFXmode( GLint mode
)
1825 * Copy the back buffer to the front buffer. If there's no back buffer
1829 void XMesaSwapBuffers( XMesaBuffer b
)
1831 GET_CURRENT_CONTEXT(ctx
);
1834 /* single buffered */
1838 /* If we're swapping the buffer associated with the current context
1839 * we have to flush any pending rendering commands first.
1841 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
1842 _mesa_notifySwapBuffers(ctx
);
1846 if (FXswapBuffers(b
))
1849 if (b
->backxrb
->ximage
) {
1850 /* Copy Ximage (back buf) from client memory to server window */
1851 #if defined(USE_XSHM)
1853 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1854 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
1856 b
->backxrb
->ximage
, 0, 0,
1857 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
1859 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1864 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1865 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
1867 b
->backxrb
->ximage
, 0, 0,
1868 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
);
1869 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1872 else if (b
->backxrb
->pixmap
) {
1873 /* Copy pixmap (back buf) to window (front buf) on server */
1874 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
1875 XMesaCopyArea( b
->xm_visual
->display
,
1876 b
->backxrb
->pixmap
, /* source drawable */
1877 b
->frontxrb
->drawable
, /* dest. drawable */
1879 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
1880 0, 0 /* dest region */
1882 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
1886 _mesa_copy_soft_alpha_renderbuffers(ctx
, &b
->mesa_buffer
);
1888 XSync( b
->xm_visual
->display
, False
);
1894 * Copy sub-region of back buffer to front buffer
1896 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
1898 GET_CURRENT_CONTEXT(ctx
);
1900 /* If we're swapping the buffer associated with the current context
1901 * we have to flush any pending rendering commands first.
1903 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
1904 _mesa_notifySwapBuffers(ctx
);
1907 /* single buffered */
1912 int yTop
= b
->mesa_buffer
.Height
- y
- height
;
1914 if (FXswapBuffers(b
))
1917 if (b
->backxrb
->ximage
) {
1918 /* Copy Ximage from host's memory to server's window */
1919 #if defined(USE_XSHM)
1921 /* XXX assuming width and height aren't too large! */
1922 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
1924 b
->backxrb
->ximage
, x
, yTop
,
1925 x
, yTop
, width
, height
, False
);
1926 /* wait for finished event??? */
1931 /* XXX assuming width and height aren't too large! */
1932 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
1934 b
->backxrb
->ximage
, x
, yTop
,
1935 x
, yTop
, width
, height
);
1939 /* Copy pixmap to window on server */
1940 XMesaCopyArea( b
->xm_visual
->display
,
1941 b
->backxrb
->pixmap
, /* source drawable */
1942 b
->frontxrb
->drawable
, /* dest. drawable */
1944 x
, yTop
, width
, height
, /* source region */
1945 x
, yTop
/* dest region */
1953 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
1954 * is a way to get "under the hood" of X/Mesa so one can manipulate the
1955 * back buffer directly.
1956 * Output: pixmap - pointer to back buffer's Pixmap, or 0
1957 * ximage - pointer to back buffer's XImage, or NULL
1958 * Return: GL_TRUE = context is double buffered
1959 * GL_FALSE = context is single buffered
1961 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
1962 XMesaPixmap
*pixmap
,
1963 XMesaImage
**ximage
)
1967 *pixmap
= b
->backxrb
->pixmap
;
1969 *ximage
= b
->backxrb
->ximage
;
1981 * Return the depth buffer associated with an XMesaBuffer.
1982 * Input: b - the XMesa buffer handle
1983 * Output: width, height - size of buffer in pixels
1984 * bytesPerValue - bytes per depth value (2 or 4)
1985 * buffer - pointer to depth buffer values
1986 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
1988 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
1989 GLint
*bytesPerValue
, void **buffer
)
1991 struct gl_renderbuffer
*rb
1992 = b
->mesa_buffer
.Attachment
[BUFFER_DEPTH
].Renderbuffer
;
1993 if (!rb
|| !rb
->Data
) {
2001 *width
= b
->mesa_buffer
.Width
;
2002 *height
= b
->mesa_buffer
.Height
;
2003 *bytesPerValue
= b
->mesa_buffer
.Visual
.depthBits
<= 16
2004 ? sizeof(GLushort
) : sizeof(GLuint
);
2011 void XMesaFlush( XMesaContext c
)
2013 if (c
&& c
->xm_visual
) {
2014 XSync( c
->xm_visual
->display
, False
);
2020 const char *XMesaGetString( XMesaContext c
, int name
)
2023 if (name
==XMESA_VERSION
) {
2026 else if (name
==XMESA_EXTENSIONS
) {
2036 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2039 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2040 if (b
->frontxrb
->drawable
== d
&& b
->display
== dpy
) {
2049 * Free/destroy all XMesaBuffers associated with given display.
2051 void xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
)
2053 XMesaBuffer b
, next
;
2054 for (b
= XMesaBufferList
; b
; b
= next
) {
2056 if (b
->display
== dpy
) {
2057 xmesa_free_buffer(b
);
2064 * Look for XMesaBuffers whose X window has been destroyed.
2065 * Deallocate any such XMesaBuffers.
2067 void XMesaGarbageCollect( void )
2069 XMesaBuffer b
, next
;
2070 for (b
=XMesaBufferList
; b
; b
=next
) {
2072 if (b
->display
&& b
->frontxrb
->drawable
&& b
->type
== WINDOW
) {
2073 XSync(b
->display
, False
);
2074 if (!window_exists( b
->display
, b
->frontxrb
->drawable
)) {
2075 /* found a dead window, free the ancillary info */
2076 XMesaDestroyBuffer( b
);
2083 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2084 GLfloat red
, GLfloat green
,
2085 GLfloat blue
, GLfloat alpha
)
2087 struct gl_context
*ctx
= &xmesa
->mesa
;
2088 GLint r
= (GLint
) (red
* 255.0F
);
2089 GLint g
= (GLint
) (green
* 255.0F
);
2090 GLint b
= (GLint
) (blue
* 255.0F
);
2091 GLint a
= (GLint
) (alpha
* 255.0F
);
2093 switch (xmesa
->pixelformat
) {
2099 PACK_TRUECOLOR( p
, r
, g
, b
);
2103 return PACK_8A8B8G8R( r
, g
, b
, a
);
2105 return PACK_8A8R8G8B( r
, g
, b
, a
);
2107 return PACK_8R8G8B( r
, g
, b
);
2109 return PACK_5R6G5B( r
, g
, b
);
2113 return DITHER( x
, y
, r
, g
, b
);
2116 /* 382 = (3*255)/2 */
2117 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2119 return DITHER_HPCR(x
, y
, r
, g
, b
);
2123 return LOOKUP( r
, g
, b
);
2126 return GRAY_RGB( r
, g
, b
);
2127 case PF_Dither_5R6G5B
:
2129 case PF_Dither_True
:
2132 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2136 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");
2143 * This is typically called when the window size changes and we need
2144 * to reallocate the buffer's back/depth/stencil/accum buffers.
2147 XMesaResizeBuffers( XMesaBuffer b
)
2149 GET_CURRENT_CONTEXT(ctx
);
2150 XMesaContext xmctx
= XMESA_CONTEXT(ctx
);
2153 xmesa_check_and_update_buffer_size(xmctx
, b
);
2158 xbuffer_to_renderbuffer(int buffer
)
2160 assert(MAX_AUX_BUFFERS
<= 4);
2163 case GLX_FRONT_LEFT_EXT
:
2164 return BUFFER_FRONT_LEFT
;
2165 case GLX_FRONT_RIGHT_EXT
:
2166 return BUFFER_FRONT_RIGHT
;
2167 case GLX_BACK_LEFT_EXT
:
2168 return BUFFER_BACK_LEFT
;
2169 case GLX_BACK_RIGHT_EXT
:
2170 return BUFFER_BACK_RIGHT
;
2183 /* BadValue error */
2190 XMesaBindTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
,
2191 const int *attrib_list
)
2194 GET_CURRENT_CONTEXT(ctx
);
2195 const GLuint unit
= ctx
->Texture
.CurrentUnit
;
2196 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
2197 struct gl_texture_object
*texObj
;
2199 struct gl_renderbuffer
*rb
;
2200 struct xmesa_renderbuffer
*xrb
;
2202 XMesaImage
*img
= NULL
;
2203 GLboolean freeImg
= GL_FALSE
;
2205 b
= xbuffer_to_renderbuffer(buffer
);
2209 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_NONE_EXT
)
2210 return; /* BadMatch error */
2212 rb
= drawable
->mesa_buffer
.Attachment
[b
].Renderbuffer
;
2214 /* invalid buffer */
2217 xrb
= xmesa_renderbuffer(rb
);
2220 switch (drawable
->TextureTarget
) {
2221 case GLX_TEXTURE_1D_EXT
:
2222 texObj
= texUnit
->CurrentTex
[TEXTURE_1D_INDEX
];
2224 case GLX_TEXTURE_2D_EXT
:
2225 texObj
= texUnit
->CurrentTex
[TEXTURE_2D_INDEX
];
2227 case GLX_TEXTURE_RECTANGLE_EXT
:
2228 texObj
= texUnit
->CurrentTex
[TEXTURE_RECT_INDEX
];
2231 return; /* BadMatch error */
2236 * The following is a quick and simple way to implement
2237 * BindTexImage. The better way is to write some new FetchTexel()
2238 * functions which would extract texels from XImages. We'd still
2239 * need to use GetImage when texturing from a Pixmap (front buffer)
2240 * but texturing from a back buffer (XImage) would avoid an image
2246 img
= XMesaGetImage(dpy
, xrb
->pixmap
, 0, 0, rb
->Width
, rb
->Height
, ~0L,
2250 else if (xrb
->ximage
) {
2254 /* store the XImage as a new texture image */
2256 GLenum format
, type
, intFormat
;
2257 if (img
->bits_per_pixel
== 32) {
2259 type
= GL_UNSIGNED_BYTE
;
2260 intFormat
= GL_RGBA
;
2262 else if (img
->bits_per_pixel
== 24) {
2264 type
= GL_UNSIGNED_BYTE
;
2267 else if (img
->bits_per_pixel
== 16) {
2269 type
= GL_UNSIGNED_SHORT_5_6_5
;
2273 _mesa_problem(NULL
, "Unexpected XImage format in XMesaBindTexImage");
2276 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGBA_EXT
) {
2277 intFormat
= GL_RGBA
;
2279 else if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGB_EXT
) {
2283 _mesa_TexImage2D(GL_TEXTURE_2D
, 0, intFormat
, rb
->Width
, rb
->Height
, 0,
2284 format
, type
, img
->data
);
2287 XMesaDestroyImage(img
);
2295 XMesaReleaseTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
)
2297 const GLint b
= xbuffer_to_renderbuffer(buffer
);