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"
69 #include "extensions.h"
70 #include "framebuffer.h"
74 #include "renderbuffer.h"
76 #include "swrast/swrast.h"
77 #include "swrast_setup/swrast_setup.h"
80 #include "tnl/t_context.h"
81 #include "tnl/t_pipeline.h"
82 #include "drivers/common/driverfuncs.h"
85 * Global X driver lock
87 _glthread_Mutex _xmesa_lock
;
92 * Lookup tables for HPCR pixel format:
94 static short hpcr_rgbTbl
[3][256] = {
96 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
97 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
98 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
99 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
100 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
101 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
102 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
103 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
104 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
105 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
106 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
107 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
108 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
109 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
110 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
111 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
114 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
115 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
116 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
117 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
118 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
119 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
120 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
121 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
122 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
123 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
124 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
125 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
126 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
127 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
128 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
129 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
132 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
133 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
134 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
135 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
136 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
137 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
138 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
139 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
140 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
141 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
142 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
143 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
144 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
145 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
146 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
147 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
153 /**********************************************************************/
154 /***** X Utility Functions *****/
155 /**********************************************************************/
159 * Return the host's byte order as LSBFirst or MSBFirst ala X.
161 #ifndef XFree86Server
162 static int host_byte_order( void )
165 char *cptr
= (char *) &i
;
166 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
172 * Check if the X Shared Memory extension is available.
173 * Return: 0 = not available
174 * 1 = shared XImage support available
175 * 2 = shared Pixmap support available also
177 static int check_for_xshm( XMesaDisplay
*display
)
179 #if defined(USE_XSHM) && !defined(XFree86Server)
180 int major
, minor
, ignore
;
183 if (XQueryExtension( display
, "MIT-SHM", &ignore
, &ignore
, &ignore
)) {
184 if (XShmQueryVersion( display
, &major
, &minor
, &pixmaps
)==True
) {
185 return (pixmaps
==True
) ? 2 : 1;
195 /* No XSHM support */
202 * Apply gamma correction to an intensity value in [0..max]. Return the
203 * new intensity value.
206 gamma_adjust( GLfloat gamma
, GLint value
, GLint max
)
212 double x
= (double) value
/ (double) max
;
213 return IROUND_POS((GLfloat
) max
* _mesa_pow(x
, 1.0F
/gamma
));
220 * Return the true number of bits per pixel for XImages.
221 * For example, if we request a 24-bit deep visual we may actually need/get
222 * 32bpp XImages. This function returns the appropriate bpp.
223 * Input: dpy - the X display
224 * visinfo - desribes the visual to be used for XImages
225 * Return: true number of bits per pixel for XImages
228 bits_per_pixel( XMesaVisual xmv
)
231 const int depth
= xmv
->nplanes
;
234 for (i
= 0; i
< screenInfo
.numPixmapFormats
; i
++) {
235 if (screenInfo
.formats
[i
].depth
== depth
)
236 return screenInfo
.formats
[i
].bitsPerPixel
;
238 return depth
; /* should never get here, but this should be safe */
240 XMesaDisplay
*dpy
= xmv
->display
;
241 XMesaVisualInfo visinfo
= xmv
->visinfo
;
244 /* Create a temporary XImage */
245 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
246 ZPixmap
, 0, /*format, offset*/
247 (char*) MALLOC(8), /*data*/
248 1, 1, /*width, height*/
253 /* grab the bits/pixel value */
254 bitsPerPixel
= img
->bits_per_pixel
;
255 /* free the XImage */
256 _mesa_free( img
->data
);
258 XMesaDestroyImage( img
);
266 * Determine if a given X window ID is valid (window exists).
267 * Do this by calling XGetWindowAttributes() for the window and
268 * checking if we catch an X error.
269 * Input: dpy - the display
270 * win - the window to check for existance
271 * Return: GL_TRUE - window exists
272 * GL_FALSE - window doesn't exist
274 #ifndef XFree86Server
275 static GLboolean WindowExistsFlag
;
277 static int window_exists_err_handler( XMesaDisplay
* dpy
, XErrorEvent
* xerr
)
280 if (xerr
->error_code
== BadWindow
) {
281 WindowExistsFlag
= GL_FALSE
;
286 static GLboolean
window_exists( XMesaDisplay
*dpy
, Window win
)
288 XWindowAttributes wa
;
289 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
290 WindowExistsFlag
= GL_TRUE
;
291 old_handler
= XSetErrorHandler(window_exists_err_handler
);
292 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
293 XSetErrorHandler(old_handler
);
294 return WindowExistsFlag
;
300 get_drawable_size(Display
*dpy
, Drawable d
, GLuint
*width
, GLuint
*height
)
305 unsigned int w
, h
, bw
, depth
;
306 stat
= XGetGeometry(dpy
, d
, &root
, &xpos
, &ypos
, &w
, &h
, &bw
, &depth
);
314 * Return the size of the window (or pixmap) that corresponds to the
316 * \param width returns width in pixels
317 * \param height returns height in pixels
320 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
321 GLuint
*width
, GLuint
*height
)
324 *width
= MIN2(b
->frontxrb
->drawable
->width
, MAX_WIDTH
);
325 *height
= MIN2(b
->frontxrb
->drawable
->height
, MAX_HEIGHT
);
329 _glthread_LOCK_MUTEX(_xmesa_lock
);
330 XSync(b
->xm_visual
->display
, 0); /* added for Chromium */
331 stat
= get_drawable_size(dpy
, b
->frontxrb
->pixmap
, width
, height
);
332 _glthread_UNLOCK_MUTEX(_xmesa_lock
);
335 /* probably querying a window that's recently been destroyed */
336 _mesa_warning(NULL
, "XGetGeometry failed!\n");
337 *width
= *height
= 1;
344 /**********************************************************************/
345 /***** Linked list of XMesaBuffers *****/
346 /**********************************************************************/
348 XMesaBuffer XMesaBufferList
= NULL
;
352 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
353 * Note that XMesaBuffer is derived from GLframebuffer.
354 * The new XMesaBuffer will not have any size (Width=Height=0).
356 * \param d the corresponding X drawable (window or pixmap)
357 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
358 * \param vis the buffer's visual
359 * \param cmap the window's colormap, if known.
360 * \return new XMesaBuffer or NULL if any problem
363 create_xmesa_buffer(XMesaDrawable d
, BufferType type
,
364 XMesaVisual vis
, XMesaColormap cmap
)
368 ASSERT(type
== WINDOW
|| type
== PIXMAP
|| type
== PBUFFER
);
370 b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
374 b
->display
= vis
->display
;
379 _mesa_initialize_framebuffer(&b
->mesa_buffer
, &vis
->mesa_visual
);
380 b
->mesa_buffer
.Delete
= xmesa_delete_framebuffer
;
385 b
->frontxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_FALSE
);
390 b
->frontxrb
->Parent
= b
;
391 b
->frontxrb
->drawable
= d
;
392 b
->frontxrb
->pixmap
= (XMesaPixmap
) d
;
393 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_FRONT_LEFT
,
399 if (vis
->mesa_visual
.doubleBufferMode
) {
400 b
->backxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_TRUE
);
402 /* XXX free front xrb too */
406 b
->backxrb
->Parent
= b
;
407 /* determine back buffer implementation */
408 b
->db_mode
= vis
->ximage_flag
? BACK_XIMAGE
: BACK_PIXMAP
;
410 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_BACK_LEFT
,
415 * Software alpha planes
417 if (vis
->mesa_visual
.alphaBits
> 0
418 && vis
->undithered_pf
!= PF_8A8B8G8R
419 && vis
->undithered_pf
!= PF_8A8R8G8B
) {
420 /* Visual has alpha, but pixel format doesn't support it.
421 * We'll use an alpha renderbuffer wrapper.
423 b
->swAlpha
= GL_TRUE
;
426 b
->swAlpha
= GL_FALSE
;
430 * Other renderbuffer (depth, stencil, etc)
432 _mesa_add_soft_renderbuffers(&b
->mesa_buffer
,
433 GL_FALSE
, /* color */
434 vis
->mesa_visual
.haveDepthBuffer
,
435 vis
->mesa_visual
.haveStencilBuffer
,
436 vis
->mesa_visual
.haveAccumBuffer
,
438 vis
->mesa_visual
.numAuxBuffers
> 0 );
440 /* GLX_EXT_texture_from_pixmap */
441 b
->TextureTarget
= 0;
442 b
->TextureFormat
= GLX_TEXTURE_FORMAT_NONE_EXT
;
443 b
->TextureMipmap
= 0;
445 /* insert buffer into linked list */
446 b
->Next
= XMesaBufferList
;
454 * Find an XMesaBuffer by matching X display and colormap but NOT matching
455 * the notThis buffer.
458 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
)
461 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
462 if (b
->display
==dpy
&& b
->cmap
==cmap
&& b
!=notThis
) {
471 * Remove buffer from linked list, delete if no longer referenced.
474 xmesa_free_buffer(XMesaBuffer buffer
)
476 XMesaBuffer prev
= NULL
, b
;
478 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
480 struct gl_framebuffer
*fb
= &buffer
->mesa_buffer
;
482 /* unlink buffer from list */
484 prev
->Next
= buffer
->Next
;
486 XMesaBufferList
= buffer
->Next
;
488 /* mark as delete pending */
489 fb
->DeletePending
= GL_TRUE
;
491 /* Since the X window for the XMesaBuffer is going away, we don't
492 * want to dereference this pointer in the future.
494 b
->frontxrb
->drawable
= 0;
496 /* Unreference. If count = zero we'll really delete the buffer */
497 _mesa_unreference_framebuffer(&fb
);
501 /* continue search */
504 /* buffer not found in XMesaBufferList */
505 _mesa_problem(NULL
,"xmesa_free_buffer() - buffer not found\n");
510 * Copy X color table stuff from one XMesaBuffer to another.
513 copy_colortable_info(XMesaBuffer dst
, const XMesaBuffer src
)
515 MEMCPY(dst
->color_table
, src
->color_table
, sizeof(src
->color_table
));
516 MEMCPY(dst
->pixel_to_r
, src
->pixel_to_r
, sizeof(src
->pixel_to_r
));
517 MEMCPY(dst
->pixel_to_g
, src
->pixel_to_g
, sizeof(src
->pixel_to_g
));
518 MEMCPY(dst
->pixel_to_b
, src
->pixel_to_b
, sizeof(src
->pixel_to_b
));
519 dst
->num_alloced
= src
->num_alloced
;
520 MEMCPY(dst
->alloced_colors
, src
->alloced_colors
,
521 sizeof(src
->alloced_colors
));
526 /**********************************************************************/
527 /***** Misc Private Functions *****/
528 /**********************************************************************/
532 * A replacement for XAllocColor. This function should never
533 * fail to allocate a color. When XAllocColor fails, we return
534 * the nearest matching color. If we have to allocate many colors
535 * this function isn't too efficient; the XQueryColors() could be
537 * Written by Michael Pichler, Brian Paul, Mark Kilgard
538 * Input: dpy - X display
540 * cmapSize - size of colormap
541 * In/Out: color - the XColor struct
542 * Output: exact - 1=exact color match, 0=closest match
543 * alloced - 1=XAlloc worked, 0=XAlloc failed
546 noFaultXAllocColor( int client
,
551 int *exact
, int *alloced
)
557 /* we'll try to cache ctable for better remote display performance */
558 static Display
*prevDisplay
= NULL
;
559 static XMesaColormap prevCmap
= 0;
560 static int prevCmapSize
= 0;
561 static XMesaColor
*ctable
= NULL
;
565 double mindist
; /* 3*2^16^2 exceeds long int precision. */
569 /* First try just using XAllocColor. */
572 &color
->red
, &color
->green
, &color
->blue
,
576 if (XAllocColor(dpy
, cmap
, color
))
584 /* Alloc failed, search for closest match */
586 /* Retrieve color table entries. */
587 /* XXX alloca candidate. */
589 ppixIn
= (Pixel
*) MALLOC(cmapSize
* sizeof(Pixel
));
590 ctable
= (xrgb
*) MALLOC(cmapSize
* sizeof(xrgb
));
591 for (i
= 0; i
< cmapSize
; i
++) {
594 QueryColors(cmap
, cmapSize
, ppixIn
, ctable
);
596 if (prevDisplay
!= dpy
|| prevCmap
!= cmap
597 || prevCmapSize
!= cmapSize
|| !ctable
) {
598 /* free previously cached color table */
601 /* Get the color table from X */
602 ctable
= (XMesaColor
*) MALLOC(cmapSize
* sizeof(XMesaColor
));
604 for (i
= 0; i
< cmapSize
; i
++) {
607 XQueryColors(dpy
, cmap
, ctable
, cmapSize
);
610 prevCmapSize
= cmapSize
;
614 /* Find best match. */
617 for (i
= 0; i
< cmapSize
; i
++) {
618 double dr
= 0.30 * ((double) color
->red
- (double) ctable
[i
].red
);
619 double dg
= 0.59 * ((double) color
->green
- (double) ctable
[i
].green
);
620 double db
= 0.11 * ((double) color
->blue
- (double) ctable
[i
].blue
);
621 double dist
= dr
* dr
+ dg
* dg
+ db
* db
;
622 if (bestmatch
< 0 || dist
< mindist
) {
629 subColor
.red
= ctable
[bestmatch
].red
;
630 subColor
.green
= ctable
[bestmatch
].green
;
631 subColor
.blue
= ctable
[bestmatch
].blue
;
632 /* Try to allocate the closest match color. This should only
633 * fail if the cell is read/write. Otherwise, we're incrementing
634 * the cell's reference count.
638 &subColor
.red
, &subColor
.green
, &subColor
.blue
,
640 client
) == Success
) {
642 if (XAllocColor(dpy
, cmap
, &subColor
)) {
647 /* do this to work around a problem reported by Frank Ortega */
648 subColor
.pixel
= (unsigned long) bestmatch
;
649 subColor
.red
= ctable
[bestmatch
].red
;
650 subColor
.green
= ctable
[bestmatch
].green
;
651 subColor
.blue
= ctable
[bestmatch
].blue
;
652 subColor
.flags
= DoRed
| DoGreen
| DoBlue
;
659 /* don't free table, save it for next time */
669 * Do setup for PF_GRAYSCALE pixel format.
670 * Note that buffer may be NULL.
673 setup_grayscale(int client
, XMesaVisual v
,
674 XMesaBuffer buffer
, XMesaColormap cmap
)
676 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
681 XMesaBuffer prevBuffer
;
687 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
689 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
690 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
691 /* Copy colormap stuff from previous XMesaBuffer which uses same
692 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
694 copy_colortable_info(buffer
, prevBuffer
);
697 /* Allocate 256 shades of gray */
699 int colorsfailed
= 0;
700 for (gray
=0;gray
<256;gray
++) {
701 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
702 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
703 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
706 xcol
.red
= (r
<< 8) | r
;
707 xcol
.green
= (g
<< 8) | g
;
708 xcol
.blue
= (b
<< 8) | b
;
709 noFaultXAllocColor( client
, v
->display
,
710 cmap
, GET_COLORMAP_SIZE(v
),
711 &xcol
, &exact
, &alloced
);
716 assert(buffer
->num_alloced
<256);
717 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
718 buffer
->num_alloced
++;
723 buffer->color_table[gray*3+0] = xcol.pixel;
724 buffer->color_table[gray*3+1] = xcol.pixel;
725 buffer->color_table[gray*3+2] = xcol.pixel;
726 assert(xcol.pixel < 65536);
727 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
728 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
729 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
731 buffer
->color_table
[gray
] = xcol
.pixel
;
732 assert(xcol
.pixel
< 65536);
733 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
734 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
735 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
738 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
740 "Note: %d out of 256 needed colors do not match exactly.\n",
746 v
->dithered_pf
= PF_Grayscale
;
747 v
->undithered_pf
= PF_Grayscale
;
754 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
755 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
756 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
757 * color. While this function was originally designed just for 8-bit
758 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
759 * Dithering code contributed by Bob Mercier.
762 setup_dithered_color(int client
, XMesaVisual v
,
763 XMesaBuffer buffer
, XMesaColormap cmap
)
765 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
770 XMesaBuffer prevBuffer
;
776 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
778 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
779 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
780 /* Copy colormap stuff from previous, matching XMesaBuffer.
781 * Do this to avoid time spent in noFaultXAllocColor.
783 copy_colortable_info(buffer
, prevBuffer
);
786 /* Allocate X colors and initialize color_table[], red_table[], etc */
788 int colorsfailed
= 0;
789 for (r
= 0; r
< DITH_R
; r
++) {
790 for (g
= 0; g
< DITH_G
; g
++) {
791 for (b
= 0; b
< DITH_B
; b
++) {
794 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(DITH_R
-1),65535);
795 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(DITH_G
-1),65535);
796 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(DITH_B
-1),65535);
797 noFaultXAllocColor( client
, v
->display
,
798 cmap
, GET_COLORMAP_SIZE(v
),
799 &xcol
, &exact
, &alloced
);
804 assert(buffer
->num_alloced
<256);
805 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
806 buffer
->num_alloced
++;
808 i
= DITH_MIX( r
, g
, b
);
810 buffer
->color_table
[i
] = xcol
.pixel
;
811 assert(xcol
.pixel
< 65536);
812 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (DITH_R
-1);
813 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (DITH_G
-1);
814 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (DITH_B
-1);
819 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
821 "Note: %d out of %d needed colors do not match exactly.\n",
822 colorsfailed
, DITH_R
* DITH_G
* DITH_B
);
827 v
->dithered_pf
= PF_Dither
;
828 v
->undithered_pf
= PF_Lookup
;
834 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
835 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
836 * Special dithering tables have to be initialized.
839 setup_8bit_hpcr(XMesaVisual v
)
841 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
842 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
843 * on the root window AND the colormap obtainable by XGetRGBColormaps
844 * for that atom must be set on the window. (see also tkInitWindow)
845 * If that colormap is not set, the output will look stripy.
848 /* Setup color tables with gamma correction */
852 g
= 1.0 / v
->RedGamma
;
853 for (i
=0; i
<256; i
++) {
854 GLint red
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[0][i
]/255.0, g
));
855 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
858 g
= 1.0 / v
->GreenGamma
;
859 for (i
=0; i
<256; i
++) {
860 GLint green
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[1][i
]/255.0, g
));
861 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
864 g
= 1.0 / v
->BlueGamma
;
865 for (i
=0; i
<256; i
++) {
866 GLint blue
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[2][i
]/255.0, g
));
867 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
869 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
870 v
->dithered_pf
= PF_HPCR
;
872 /* which method should I use to clear */
873 /* GL_FALSE: keep the ordinary method */
874 /* GL_TRUE : clear with dither pattern */
875 v
->hpcr_clear_flag
= _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
877 if (v
->hpcr_clear_flag
) {
878 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
879 DefaultRootWindow(v
->display
),
881 #ifndef XFree86Server
882 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
883 0, 0, 16, 2, AllPlanes
, ZPixmap
);
890 * Setup RGB rendering for a window with a True/DirectColor visual.
893 setup_truecolor(XMesaVisual v
, XMesaBuffer buffer
, XMesaColormap cmap
)
895 unsigned long rmask
, gmask
, bmask
;
899 /* Compute red multiplier (mask) and bit shift */
901 rmask
= GET_REDMASK(v
);
902 while ((rmask
& 1)==0) {
907 /* Compute green multiplier (mask) and bit shift */
909 gmask
= GET_GREENMASK(v
);
910 while ((gmask
& 1)==0) {
915 /* Compute blue multiplier (mask) and bit shift */
917 bmask
= GET_BLUEMASK(v
);
918 while ((bmask
& 1)==0) {
924 * Compute component-to-pixel lookup tables and dithering kernel
927 static GLubyte kernel
[16] = {
928 0*16, 8*16, 2*16, 10*16,
929 12*16, 4*16, 14*16, 6*16,
930 3*16, 11*16, 1*16, 9*16,
931 15*16, 7*16, 13*16, 5*16,
933 GLint rBits
= _mesa_bitcount(rmask
);
934 GLint gBits
= _mesa_bitcount(gmask
);
935 GLint bBits
= _mesa_bitcount(bmask
);
939 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
940 for (i
=0; i
<=rmask
; i
++)
941 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
942 for (i
=0; i
<=gmask
; i
++)
943 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
944 for (i
=0; i
<=bmask
; i
++)
945 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
947 /* convert RGB values from [0,255] to pixel components */
949 for (i
=0;i
<256;i
++) {
950 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
951 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
952 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
953 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
954 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
955 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
957 /* overflow protection */
958 for (i
=256;i
<512;i
++) {
959 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
960 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
961 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
964 /* setup dithering kernel */
966 if (gBits
> maxBits
) maxBits
= gBits
;
967 if (bBits
> maxBits
) maxBits
= bBits
;
969 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
972 v
->undithered_pf
= PF_Truecolor
;
973 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_Dither_True
: PF_Truecolor
;
977 * Now check for TrueColor visuals which we can optimize.
979 if ( GET_REDMASK(v
) ==0x0000ff
980 && GET_GREENMASK(v
)==0x00ff00
981 && GET_BLUEMASK(v
) ==0xff0000
982 && CHECK_BYTE_ORDER(v
)
983 && v
->BitsPerPixel
==32
984 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
985 /* common 32 bpp config used on SGI, Sun */
986 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
; /* ABGR */
988 else if (GET_REDMASK(v
) == 0xff0000
989 && GET_GREENMASK(v
)== 0x00ff00
990 && GET_BLUEMASK(v
) == 0x0000ff
991 && CHECK_BYTE_ORDER(v
)
992 && v
->RedGamma
== 1.0 && v
->GreenGamma
== 1.0 && v
->BlueGamma
== 1.0){
993 if (v
->BitsPerPixel
==32) {
994 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
995 if (GET_VISUAL_DEPTH(v
) == 32 && v
->mesa_visual
.alphaBits
== 8)
996 v
->undithered_pf
= v
->dithered_pf
= PF_8A8R8G8B
; /* ARGB */
998 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
; /* xRGB */
1000 else if (v
->BitsPerPixel
== 24) {
1001 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
; /* RGB */
1004 else if (GET_REDMASK(v
) ==0xf800
1005 && GET_GREENMASK(v
)==0x07e0
1006 && GET_BLUEMASK(v
) ==0x001f
1007 && CHECK_BYTE_ORDER(v
)
1008 && v
->BitsPerPixel
==16
1009 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1011 v
->undithered_pf
= PF_5R6G5B
;
1012 v
->dithered_pf
= PF_Dither_5R6G5B
;
1014 else if (GET_REDMASK(v
) ==0xe0
1015 && GET_GREENMASK(v
)==0x1c
1016 && GET_BLUEMASK(v
) ==0x03
1017 && CHECK_FOR_HPCR(v
)) {
1018 /* 8-bit HP color recovery */
1019 setup_8bit_hpcr( v
);
1026 * Setup RGB rendering for a window with a monochrome visual.
1029 setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
1032 v
->dithered_pf
= v
->undithered_pf
= PF_1Bit
;
1033 /* if black=1 then we must flip pixel values */
1034 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
1040 * When a context is bound for the first time, we can finally finish
1041 * initializing the context's visual and buffer information.
1042 * \param v the XMesaVisual to initialize
1043 * \param b the XMesaBuffer to initialize (may be NULL)
1044 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1045 * \param window the window/pixmap we're rendering into
1046 * \param cmap the colormap associated with the window/pixmap
1047 * \return GL_TRUE=success, GL_FALSE=failure
1050 initialize_visual_and_buffer(XMesaVisual v
, XMesaBuffer b
,
1051 GLboolean rgb_flag
, XMesaDrawable window
,
1056 #ifdef XFree86Server
1057 client
= (window
) ? CLIENT_ID(window
->id
) : 0;
1060 ASSERT(!b
|| b
->xm_visual
== v
);
1062 /* Save true bits/pixel */
1063 v
->BitsPerPixel
= bits_per_pixel(v
);
1064 assert(v
->BitsPerPixel
> 0);
1066 if (rgb_flag
== GL_FALSE
) {
1067 /* COLOR-INDEXED WINDOW:
1068 * Even if the visual is TrueColor or DirectColor we treat it as
1069 * being color indexed. This is weird but might be useful to someone.
1071 v
->dithered_pf
= v
->undithered_pf
= PF_Index
;
1072 v
->mesa_visual
.indexBits
= GET_VISUAL_DEPTH(v
);
1076 * We support RGB rendering into almost any kind of visual.
1078 const int xclass
= v
->mesa_visual
.visualType
;
1079 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1080 setup_truecolor( v
, b
, cmap
);
1082 else if (xclass
== GLX_STATIC_GRAY
&& GET_VISUAL_DEPTH(v
) == 1) {
1083 setup_monochrome( v
, b
);
1085 else if (xclass
== GLX_GRAY_SCALE
|| xclass
== GLX_STATIC_GRAY
) {
1086 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1090 else if ((xclass
== GLX_PSEUDO_COLOR
|| xclass
== GLX_STATIC_COLOR
)
1091 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1092 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1097 _mesa_warning(NULL
, "XMesa: RGB mode rendering not supported in given visual.\n");
1100 v
->mesa_visual
.indexBits
= 0;
1102 if (_mesa_getenv("MESA_NO_DITHER")) {
1103 v
->dithered_pf
= v
->undithered_pf
;
1109 * If MESA_INFO env var is set print out some debugging info
1110 * which can help Brian figure out what's going on when a user
1113 if (_mesa_getenv("MESA_INFO")) {
1114 _mesa_printf("X/Mesa visual = %p\n", (void *) v
);
1115 _mesa_printf("X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1116 _mesa_printf("X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1117 _mesa_printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
1118 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1119 _mesa_printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1125 /* Do window-specific initializations */
1127 /* these should have been set in create_xmesa_buffer */
1128 ASSERT(b
->frontxrb
->drawable
== window
);
1129 ASSERT(b
->frontxrb
->pixmap
== (XMesaPixmap
) window
);
1131 /* Setup for single/double buffering */
1132 if (v
->mesa_visual
.doubleBufferMode
) {
1133 /* Double buffered */
1134 b
->shm
= check_for_xshm( v
->display
);
1137 /* X11 graphics contexts */
1138 #ifdef XFree86Server
1139 b
->gc
= CreateScratchGC(v
->display
, window
->depth
);
1141 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1143 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1145 /* cleargc - for glClear() */
1146 #ifdef XFree86Server
1147 b
->cleargc
= CreateScratchGC(v
->display
, window
->depth
);
1149 b
->cleargc
= XCreateGC( v
->display
, window
, 0, NULL
);
1151 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1154 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1155 * Patch contributed by Michael Pichler May 15, 1995.
1157 #ifdef XFree86Server
1158 b
->swapgc
= CreateScratchGC(v
->display
, window
->depth
);
1162 dixChangeGC(NullClient
, b
->swapgc
, GCGraphicsExposures
, v
, NULL
);
1167 gcvalues
.graphics_exposures
= False
;
1168 b
->swapgc
= XCreateGC(v
->display
, window
,
1169 GCGraphicsExposures
, &gcvalues
);
1172 XMesaSetFunction( v
->display
, b
->swapgc
, GXcopy
);
1174 * Set fill style and tile pixmap once for all for HPCR stuff
1175 * (instead of doing it each time in clear_color_HPCR_pixmap())
1176 * Initialize whole stuff
1177 * Patch contributed by Jacques Leroy March 8, 1998.
1179 if (v
->hpcr_clear_flag
&& b
->backxrb
&& b
->backxrb
->pixmap
) {
1181 for (i
= 0; i
< 16; i
++) {
1182 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1183 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1185 XMesaPutImage(b
->display
, (XMesaDrawable
) v
->hpcr_clear_pixmap
,
1186 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1187 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1188 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1191 /* Initialize the row buffer XImage for use in write_color_span() */
1192 data
= (char*) MALLOC(MAX_WIDTH
*4);
1193 #ifdef XFree86Server
1194 b
->rowimage
= XMesaCreateImage(GET_VISUAL_DEPTH(v
), MAX_WIDTH
, 1, data
);
1196 b
->rowimage
= XCreateImage( v
->display
,
1199 ZPixmap
, 0, /*format, offset*/
1201 MAX_WIDTH
, 1, /*width, height*/
1203 0 /*bytes_per_line*/ );
1215 * Convert an RGBA color to a pixel value.
1218 xmesa_color_to_pixel(GLcontext
*ctx
,
1219 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1222 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1223 switch (pixelFormat
) {
1229 PACK_TRUECOLOR( p
, r
, g
, b
);
1233 return PACK_8A8B8G8R( r
, g
, b
, a
);
1235 return PACK_8A8R8G8B( r
, g
, b
, a
);
1239 return PACK_8R8G8B( r
, g
, b
);
1241 return PACK_5R6G5B( r
, g
, b
);
1245 return DITHER( 1, 0, r
, g
, b
);
1248 /* 382 = (3*255)/2 */
1249 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1251 return DITHER_HPCR(1, 1, r
, g
, b
);
1255 return LOOKUP( r
, g
, b
);
1258 return GRAY_RGB( r
, g
, b
);
1259 case PF_Dither_True
:
1261 case PF_Dither_5R6G5B
:
1264 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1268 _mesa_problem(ctx
, "Bad pixel format in xmesa_color_to_pixel");
1274 #define NUM_VISUAL_TYPES 6
1277 * Convert an X visual type to a GLX visual type.
1279 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1281 * \return If \c visualType is a valid X visual type, a GLX visual type will
1282 * be returned. Otherwise \c GLX_NONE will be returned.
1285 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1289 xmesa_convert_from_x_visual_type( int visualType
)
1291 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
1292 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
1293 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
1294 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
1297 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
1298 ? glx_visual_types
[ visualType
] : GLX_NONE
;
1302 /**********************************************************************/
1303 /***** Public Functions *****/
1304 /**********************************************************************/
1308 * Create a new X/Mesa visual.
1309 * Input: display - X11 display
1310 * visinfo - an XVisualInfo pointer
1311 * rgb_flag - GL_TRUE = RGB mode,
1312 * GL_FALSE = color index mode
1313 * alpha_flag - alpha buffer requested?
1314 * db_flag - GL_TRUE = double-buffered,
1315 * GL_FALSE = single buffered
1316 * stereo_flag - stereo visual?
1317 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1318 * GL_FALSE = use an off-screen pixmap for back buffer
1319 * depth_size - requested bits/depth values, or zero
1320 * stencil_size - requested bits/stencil values, or zero
1321 * accum_red_size - requested bits/red accum values, or zero
1322 * accum_green_size - requested bits/green accum values, or zero
1323 * accum_blue_size - requested bits/blue accum values, or zero
1324 * accum_alpha_size - requested bits/alpha accum values, or zero
1325 * num_samples - number of samples/pixel if multisampling, or zero
1326 * level - visual level, usually 0
1327 * visualCaveat - ala the GLX extension, usually GLX_NONE
1328 * Return; a new XMesaVisual or 0 if error.
1331 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1332 XMesaVisualInfo visinfo
,
1334 GLboolean alpha_flag
,
1336 GLboolean stereo_flag
,
1337 GLboolean ximage_flag
,
1340 GLint accum_red_size
,
1341 GLint accum_green_size
,
1342 GLint accum_blue_size
,
1343 GLint accum_alpha_size
,
1346 GLint visualCaveat
)
1350 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1352 #ifndef XFree86Server
1353 /* For debugging only */
1354 if (_mesa_getenv("MESA_XSYNC")) {
1355 /* This makes debugging X easier.
1356 * In your debugger, set a breakpoint on _XError to stop when an
1357 * X protocol error is generated.
1359 XSynchronize( display
, 1 );
1363 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1368 v
->display
= display
;
1370 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1371 * the struct but we may need some of the information contained in it
1374 #ifndef XFree86Server
1375 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1380 MEMCPY(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1383 /* check for MESA_GAMMA environment variable */
1384 gamma
= _mesa_getenv("MESA_GAMMA");
1386 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1387 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1388 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1389 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1390 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1393 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1396 v
->ximage_flag
= ximage_flag
;
1398 #ifdef XFree86Server
1399 /* We could calculate these values by ourselves. nplanes is either the sum
1400 * of the red, green, and blue bits or the number index bits.
1401 * ColormapEntries is either (1U << index_bits) or
1402 * (1U << max(redBits, greenBits, blueBits)).
1404 assert(visinfo
->nplanes
> 0);
1405 v
->nplanes
= visinfo
->nplanes
;
1406 v
->ColormapEntries
= visinfo
->ColormapEntries
;
1408 v
->mesa_visual
.redMask
= visinfo
->redMask
;
1409 v
->mesa_visual
.greenMask
= visinfo
->greenMask
;
1410 v
->mesa_visual
.blueMask
= visinfo
->blueMask
;
1411 v
->mesa_visual
.visualID
= visinfo
->vid
;
1412 v
->mesa_visual
.screen
= 0; /* FIXME: What should be done here? */
1414 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
1415 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
1416 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
1417 v
->mesa_visual
.visualID
= visinfo
->visualid
;
1418 v
->mesa_visual
.screen
= visinfo
->screen
;
1421 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1422 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
1424 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
1427 v
->mesa_visual
.visualRating
= visualCaveat
;
1430 v
->mesa_visual
.alphaBits
= 8;
1432 (void) initialize_visual_and_buffer( v
, NULL
, rgb_flag
, 0, 0 );
1435 const int xclass
= v
->mesa_visual
.visualType
;
1436 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1437 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
1438 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
1439 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
1442 /* this is an approximation */
1444 depth
= GET_VISUAL_DEPTH(v
);
1445 red_bits
= depth
/ 3;
1447 green_bits
= depth
/ 2;
1448 depth
-= green_bits
;
1451 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1453 alpha_bits
= v
->mesa_visual
.alphaBits
;
1456 _mesa_initialize_visual( &v
->mesa_visual
,
1457 rgb_flag
, db_flag
, stereo_flag
,
1458 red_bits
, green_bits
,
1459 blue_bits
, alpha_bits
,
1460 v
->mesa_visual
.indexBits
,
1463 accum_red_size
, accum_green_size
,
1464 accum_blue_size
, accum_alpha_size
,
1467 /* XXX minor hack */
1468 v
->mesa_visual
.level
= level
;
1474 void XMesaDestroyVisual( XMesaVisual v
)
1476 #ifndef XFree86Server
1477 _mesa_free(v
->visinfo
);
1485 * Create a new XMesaContext.
1486 * \param v the XMesaVisual
1487 * \param share_list another XMesaContext with which to share display
1488 * lists or NULL if no sharing is wanted.
1489 * \return an XMesaContext or NULL if error.
1492 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1494 static GLboolean firstTime
= GL_TRUE
;
1497 struct dd_function_table functions
;
1501 _glthread_INIT_MUTEX(_xmesa_lock
);
1502 firstTime
= GL_FALSE
;
1505 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1506 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1510 mesaCtx
= &(c
->mesa
);
1512 /* initialize with default driver functions, then plug in XMesa funcs */
1513 _mesa_init_driver_functions(&functions
);
1514 xmesa_init_driver_functions(v
, &functions
);
1515 if (!_mesa_initialize_context(mesaCtx
, &v
->mesa_visual
,
1516 share_list
? &(share_list
->mesa
) : (GLcontext
*) NULL
,
1517 &functions
, (void *) c
)) {
1522 _mesa_enable_sw_extensions(mesaCtx
);
1523 _mesa_enable_1_3_extensions(mesaCtx
);
1524 _mesa_enable_1_4_extensions(mesaCtx
);
1525 _mesa_enable_1_5_extensions(mesaCtx
);
1526 _mesa_enable_2_0_extensions(mesaCtx
);
1527 #if ENABLE_EXT_texure_compression_s3tc
1529 _mesa_enable_extension(mesaCtx
, "GL_EXT_texture_compression_s3tc");
1530 _mesa_enable_extension(mesaCtx
, "GL_S3_s3tc");
1532 _mesa_enable_extension(mesaCtx
, "GL_3DFX_texture_compression_FXT1");
1534 #if ENABLE_EXT_timer_query
1535 _mesa_enable_extension(mesaCtx
, "GL_EXT_timer_query");
1538 #ifdef XFree86Server
1539 /* If we're running in the X server, do bounds checking to prevent
1540 * segfaults and server crashes!
1542 mesaCtx
->Const
.CheckArrayBounds
= GL_TRUE
;
1545 /* finish up xmesa context initializations */
1546 c
->swapbytes
= CHECK_BYTE_ORDER(v
) ? GL_FALSE
: GL_TRUE
;
1548 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1549 c
->display
= v
->display
;
1550 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1552 /* Initialize the software rasterizer and helper modules.
1554 if (!_swrast_CreateContext( mesaCtx
) ||
1555 !_vbo_CreateContext( mesaCtx
) ||
1556 !_tnl_CreateContext( mesaCtx
) ||
1557 !_swsetup_CreateContext( mesaCtx
)) {
1558 _mesa_free_context_data(&c
->mesa
);
1564 tnl
= TNL_CONTEXT(mesaCtx
);
1565 tnl
->Driver
.RunPipeline
= _tnl_run_pipeline
;
1567 xmesa_register_swrast_functions( mesaCtx
);
1568 _swsetup_Wakeup(mesaCtx
);
1576 void XMesaDestroyContext( XMesaContext c
)
1578 GLcontext
*mesaCtx
= &c
->mesa
;
1581 FXdestroyContext( XMESA_BUFFER(mesaCtx
->DrawBuffer
) );
1584 _swsetup_DestroyContext( mesaCtx
);
1585 _swrast_DestroyContext( mesaCtx
);
1586 _tnl_DestroyContext( mesaCtx
);
1587 _vbo_DestroyContext( mesaCtx
);
1588 _mesa_free_context_data( mesaCtx
);
1595 * Private function for creating an XMesaBuffer which corresponds to an
1596 * X window or pixmap.
1597 * \param v the window's XMesaVisual
1598 * \param w the window we're wrapping
1599 * \return new XMesaBuffer or NULL if error
1602 XMesaCreateWindowBuffer(XMesaVisual v
, XMesaWindow w
)
1604 #ifndef XFree86Server
1605 XWindowAttributes attr
;
1614 /* Check that window depth matches visual depth */
1615 #ifdef XFree86Server
1616 depth
= ((XMesaDrawable
)w
)->depth
;
1618 XGetWindowAttributes( v
->display
, w
, &attr
);
1621 if (GET_VISUAL_DEPTH(v
) != depth
) {
1622 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1623 GET_VISUAL_DEPTH(v
), depth
);
1628 #ifdef XFree86Server
1629 cmap
= (ColormapPtr
)LookupIDByType(wColormap(w
), RT_COLORMAP
);
1631 if (attr
.colormap
) {
1632 cmap
= attr
.colormap
;
1635 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
1636 /* this is weird, a window w/out a colormap!? */
1637 /* OK, let's just allocate a new one and hope for the best */
1638 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1642 b
= create_xmesa_buffer((XMesaDrawable
) w
, WINDOW
, v
, cmap
);
1646 if (!initialize_visual_and_buffer( v
, b
, v
->mesa_visual
.rgbMode
,
1647 (XMesaDrawable
) w
, cmap
)) {
1648 xmesa_free_buffer(b
);
1658 * Create a new XMesaBuffer from an X pixmap.
1660 * \param v the XMesaVisual
1661 * \param p the pixmap
1662 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1663 * \c GLX_DIRECT_COLOR visual for the pixmap
1664 * \returns new XMesaBuffer or NULL if error
1667 XMesaCreatePixmapBuffer(XMesaVisual v
, XMesaPixmap p
, XMesaColormap cmap
)
1673 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1677 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1678 (XMesaDrawable
) p
, cmap
)) {
1679 xmesa_free_buffer(b
);
1688 * For GLX_EXT_texture_from_pixmap
1691 XMesaCreatePixmapTextureBuffer(XMesaVisual v
, XMesaPixmap p
,
1693 int format
, int target
, int mipmap
)
1695 GET_CURRENT_CONTEXT(ctx
);
1697 GLuint width
, height
;
1701 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1705 /* get pixmap size, update framebuffer/renderbuffer dims */
1706 get_drawable_size(v
->display
, p
, &width
, &height
);
1707 _mesa_resize_framebuffer(NULL
, &(b
->mesa_buffer
), width
, height
);
1711 if (ctx
->Extensions
.ARB_texture_non_power_of_two
) {
1712 target
= GLX_TEXTURE_2D_EXT
;
1714 else if ( _mesa_bitcount(width
) == 1
1715 && _mesa_bitcount(height
) == 1) {
1716 /* power of two size */
1718 target
= GLX_TEXTURE_1D_EXT
;
1721 target
= GLX_TEXTURE_2D_EXT
;
1724 else if (ctx
->Extensions
.NV_texture_rectangle
) {
1725 target
= GLX_TEXTURE_RECTANGLE_EXT
;
1728 /* non power of two textures not supported */
1729 XMesaDestroyBuffer(b
);
1734 b
->TextureTarget
= target
;
1735 b
->TextureFormat
= format
;
1736 b
->TextureMipmap
= mipmap
;
1738 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1739 (XMesaDrawable
) p
, cmap
)) {
1740 xmesa_free_buffer(b
);
1750 XMesaCreatePBuffer(XMesaVisual v
, XMesaColormap cmap
,
1751 unsigned int width
, unsigned int height
)
1753 #ifndef XFree86Server
1755 XMesaDrawable drawable
; /* X Pixmap Drawable */
1758 /* allocate pixmap for front buffer */
1759 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1760 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1765 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1769 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1771 xmesa_free_buffer(b
);
1784 * Deallocate an XMesaBuffer structure and all related info.
1787 XMesaDestroyBuffer(XMesaBuffer b
)
1789 xmesa_free_buffer(b
);
1794 * Query the current window size and update the corresponding GLframebuffer
1795 * and all attached renderbuffers.
1797 * 1. the first time a buffer is bound to a context.
1798 * 2. from glViewport to poll for window size changes
1799 * 3. from the XMesaResizeBuffers() API function.
1800 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1801 * when resizing a buffer when no rendering context is bound.
1804 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
)
1806 GLuint width
, height
;
1807 xmesa_get_window_size(drawBuffer
->display
, drawBuffer
, &width
, &height
);
1808 if (drawBuffer
->mesa_buffer
.Width
!= width
||
1809 drawBuffer
->mesa_buffer
.Height
!= height
) {
1810 GLcontext
*ctx
= xmctx
? &xmctx
->mesa
: NULL
;
1811 _mesa_resize_framebuffer(ctx
, &(drawBuffer
->mesa_buffer
), width
, height
);
1813 drawBuffer
->mesa_buffer
.Initialized
= GL_TRUE
; /* XXX TEMPORARY? */
1818 * Bind buffer b to context c and make c the current rendering context.
1820 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
1822 return XMesaMakeCurrent2( c
, b
, b
);
1827 * Bind buffer b to context c and make c the current rendering context.
1830 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1831 XMesaBuffer readBuffer
)
1834 if (!drawBuffer
|| !readBuffer
)
1835 return GL_FALSE
; /* must specify buffers! */
1837 if (&(c
->mesa
) == _mesa_get_current_context()
1838 && c
->mesa
.DrawBuffer
== &drawBuffer
->mesa_buffer
1839 && c
->mesa
.ReadBuffer
== &readBuffer
->mesa_buffer
1840 && XMESA_BUFFER(c
->mesa
.DrawBuffer
)->wasCurrent
) {
1841 /* same context and buffer, do nothing */
1845 c
->xm_buffer
= drawBuffer
;
1848 if (FXmakeCurrent( drawBuffer
))
1852 /* Call this periodically to detect when the user has begun using
1853 * GL rendering from multiple threads.
1855 _glapi_check_multithread();
1857 xmesa_check_and_update_buffer_size(c
, drawBuffer
);
1858 if (readBuffer
!= drawBuffer
)
1859 xmesa_check_and_update_buffer_size(c
, readBuffer
);
1861 _mesa_make_current(&(c
->mesa
),
1862 &drawBuffer
->mesa_buffer
,
1863 &readBuffer
->mesa_buffer
);
1865 if (c
->xm_visual
->mesa_visual
.rgbMode
) {
1867 * Must recompute and set these pixel values because colormap
1868 * can be different for different windows.
1870 c
->clearpixel
= xmesa_color_to_pixel( &c
->mesa
,
1875 c
->xm_visual
->undithered_pf
);
1876 XMesaSetForeground(c
->display
, drawBuffer
->cleargc
, c
->clearpixel
);
1879 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1880 drawBuffer
->wasCurrent
= GL_TRUE
;
1884 _mesa_make_current( NULL
, NULL
, NULL
);
1891 * Unbind the context c from its buffer.
1893 GLboolean
XMesaUnbindContext( XMesaContext c
)
1895 /* A no-op for XFree86 integration purposes */
1900 XMesaContext
XMesaGetCurrentContext( void )
1902 GET_CURRENT_CONTEXT(ctx
);
1904 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1913 XMesaBuffer
XMesaGetCurrentBuffer( void )
1915 GET_CURRENT_CONTEXT(ctx
);
1917 XMesaBuffer xmbuf
= XMESA_BUFFER(ctx
->DrawBuffer
);
1926 /* New in Mesa 3.1 */
1927 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
1929 GET_CURRENT_CONTEXT(ctx
);
1931 return XMESA_BUFFER(ctx
->ReadBuffer
);
1939 #ifdef XFree86Server
1941 GLboolean
XMesaForceCurrent(XMesaContext c
)
1944 _glapi_set_dispatch(c
->mesa
.CurrentDispatch
);
1946 if (&(c
->mesa
) != _mesa_get_current_context()) {
1947 _mesa_make_current(&c
->mesa
, c
->mesa
.DrawBuffer
, c
->mesa
.ReadBuffer
);
1951 _mesa_make_current(NULL
, NULL
, NULL
);
1958 GLboolean
XMesaLoseCurrent(XMesaContext c
)
1961 _mesa_make_current(NULL
, NULL
, NULL
);
1967 GLboolean
XMesaCopyContext( XMesaContext xm_src
, XMesaContext xm_dst
, GLuint mask
)
1969 _mesa_copy_context(&xm_src
->mesa
, &xm_dst
->mesa
, mask
);
1972 #endif /* XFree86Server */
1976 GLboolean
XMesaSetFXmode( GLint mode
)
1986 * Copy the back buffer to the front buffer. If there's no back buffer
1990 void XMesaSwapBuffers( XMesaBuffer b
)
1992 GET_CURRENT_CONTEXT(ctx
);
1995 /* single buffered */
1999 /* If we're swapping the buffer associated with the current context
2000 * we have to flush any pending rendering commands first.
2002 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2003 _mesa_notifySwapBuffers(ctx
);
2007 if (FXswapBuffers(b
))
2010 if (b
->backxrb
->ximage
) {
2011 /* Copy Ximage (back buf) from client memory to server window */
2012 #if defined(USE_XSHM) && !defined(XFree86Server)
2014 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2015 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2017 b
->backxrb
->ximage
, 0, 0,
2018 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2020 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2025 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2026 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2028 b
->backxrb
->ximage
, 0, 0,
2029 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
);
2030 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2033 else if (b
->backxrb
->pixmap
) {
2034 /* Copy pixmap (back buf) to window (front buf) on server */
2035 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2036 XMesaCopyArea( b
->xm_visual
->display
,
2037 b
->backxrb
->pixmap
, /* source drawable */
2038 b
->frontxrb
->drawable
, /* dest. drawable */
2040 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2041 0, 0 /* dest region */
2043 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2047 _mesa_copy_soft_alpha_renderbuffers(ctx
, &b
->mesa_buffer
);
2049 #if !defined(XFree86Server)
2050 XSync( b
->xm_visual
->display
, False
);
2057 * Copy sub-region of back buffer to front buffer
2059 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
2061 GET_CURRENT_CONTEXT(ctx
);
2063 /* If we're swapping the buffer associated with the current context
2064 * we have to flush any pending rendering commands first.
2066 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2067 _mesa_notifySwapBuffers(ctx
);
2070 /* single buffered */
2075 int yTop
= b
->mesa_buffer
.Height
- y
- height
;
2077 if (FXswapBuffers(b
))
2080 if (b
->backxrb
->ximage
) {
2081 /* Copy Ximage from host's memory to server's window */
2082 #if defined(USE_XSHM) && !defined(XFree86Server)
2084 /* XXX assuming width and height aren't too large! */
2085 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2087 b
->backxrb
->ximage
, x
, yTop
,
2088 x
, yTop
, width
, height
, False
);
2089 /* wait for finished event??? */
2094 /* XXX assuming width and height aren't too large! */
2095 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2097 b
->backxrb
->ximage
, x
, yTop
,
2098 x
, yTop
, width
, height
);
2102 /* Copy pixmap to window on server */
2103 XMesaCopyArea( b
->xm_visual
->display
,
2104 b
->backxrb
->pixmap
, /* source drawable */
2105 b
->frontxrb
->drawable
, /* dest. drawable */
2107 x
, yTop
, width
, height
, /* source region */
2108 x
, yTop
/* dest region */
2116 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2117 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2118 * back buffer directly.
2119 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2120 * ximage - pointer to back buffer's XImage, or NULL
2121 * Return: GL_TRUE = context is double buffered
2122 * GL_FALSE = context is single buffered
2124 #ifndef XFree86Server
2125 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
2126 XMesaPixmap
*pixmap
,
2127 XMesaImage
**ximage
)
2131 *pixmap
= b
->backxrb
->pixmap
;
2133 *ximage
= b
->backxrb
->ximage
;
2142 #endif /* XFree86Server */
2146 * Return the depth buffer associated with an XMesaBuffer.
2147 * Input: b - the XMesa buffer handle
2148 * Output: width, height - size of buffer in pixels
2149 * bytesPerValue - bytes per depth value (2 or 4)
2150 * buffer - pointer to depth buffer values
2151 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2153 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
2154 GLint
*bytesPerValue
, void **buffer
)
2156 struct gl_renderbuffer
*rb
2157 = b
->mesa_buffer
.Attachment
[BUFFER_DEPTH
].Renderbuffer
;
2158 if (!rb
|| !rb
->Data
) {
2166 *width
= b
->mesa_buffer
.Width
;
2167 *height
= b
->mesa_buffer
.Height
;
2168 *bytesPerValue
= b
->mesa_buffer
.Visual
.depthBits
<= 16
2169 ? sizeof(GLushort
) : sizeof(GLuint
);
2176 void XMesaFlush( XMesaContext c
)
2178 if (c
&& c
->xm_visual
) {
2179 #ifdef XFree86Server
2182 XSync( c
->xm_visual
->display
, False
);
2189 const char *XMesaGetString( XMesaContext c
, int name
)
2192 if (name
==XMESA_VERSION
) {
2195 else if (name
==XMESA_EXTENSIONS
) {
2205 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2208 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2209 if (b
->frontxrb
->drawable
== d
&& b
->display
== dpy
) {
2218 * Free/destroy all XMesaBuffers associated with given display.
2220 void xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
)
2222 XMesaBuffer b
, next
;
2223 for (b
= XMesaBufferList
; b
; b
= next
) {
2225 if (b
->display
== dpy
) {
2226 xmesa_free_buffer(b
);
2233 * Look for XMesaBuffers whose X window has been destroyed.
2234 * Deallocate any such XMesaBuffers.
2236 void XMesaGarbageCollect( void )
2238 XMesaBuffer b
, next
;
2239 for (b
=XMesaBufferList
; b
; b
=next
) {
2241 if (b
->display
&& b
->frontxrb
->drawable
&& b
->type
== WINDOW
) {
2242 #ifdef XFree86Server
2245 XSync(b
->display
, False
);
2246 if (!window_exists( b
->display
, b
->frontxrb
->drawable
)) {
2247 /* found a dead window, free the ancillary info */
2248 XMesaDestroyBuffer( b
);
2256 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2257 GLfloat red
, GLfloat green
,
2258 GLfloat blue
, GLfloat alpha
)
2260 GLcontext
*ctx
= &xmesa
->mesa
;
2261 GLint r
= (GLint
) (red
* 255.0F
);
2262 GLint g
= (GLint
) (green
* 255.0F
);
2263 GLint b
= (GLint
) (blue
* 255.0F
);
2264 GLint a
= (GLint
) (alpha
* 255.0F
);
2266 switch (xmesa
->pixelformat
) {
2272 PACK_TRUECOLOR( p
, r
, g
, b
);
2276 return PACK_8A8B8G8R( r
, g
, b
, a
);
2278 return PACK_8A8R8G8B( r
, g
, b
, a
);
2280 return PACK_8R8G8B( r
, g
, b
);
2282 return PACK_5R6G5B( r
, g
, b
);
2286 return DITHER( x
, y
, r
, g
, b
);
2289 /* 382 = (3*255)/2 */
2290 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2292 return DITHER_HPCR(x
, y
, r
, g
, b
);
2296 return LOOKUP( r
, g
, b
);
2299 return GRAY_RGB( r
, g
, b
);
2300 case PF_Dither_5R6G5B
:
2302 case PF_Dither_True
:
2305 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2309 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");
2316 * This is typically called when the window size changes and we need
2317 * to reallocate the buffer's back/depth/stencil/accum buffers.
2320 XMesaResizeBuffers( XMesaBuffer b
)
2322 GET_CURRENT_CONTEXT(ctx
);
2323 XMesaContext xmctx
= XMESA_CONTEXT(ctx
);
2326 xmesa_check_and_update_buffer_size(xmctx
, b
);
2331 xbuffer_to_renderbuffer(int buffer
)
2333 assert(MAX_AUX_BUFFERS
<= 4);
2336 case GLX_FRONT_LEFT_EXT
:
2337 return BUFFER_FRONT_LEFT
;
2338 case GLX_FRONT_RIGHT_EXT
:
2339 return BUFFER_FRONT_RIGHT
;
2340 case GLX_BACK_LEFT_EXT
:
2341 return BUFFER_BACK_LEFT
;
2342 case GLX_BACK_RIGHT_EXT
:
2343 return BUFFER_BACK_RIGHT
;
2359 /* BadValue error */
2366 XMesaBindTexImage(Display
*dpy
, XMesaBuffer drawable
, int buffer
,
2367 const int *attrib_list
)
2370 GET_CURRENT_CONTEXT(ctx
);
2371 const GLuint unit
= ctx
->Texture
.CurrentUnit
;
2372 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
2373 struct gl_texture_object
*texObj
;
2375 struct gl_renderbuffer
*rb
;
2376 struct xmesa_renderbuffer
*xrb
;
2379 GLboolean freeImg
= GL_FALSE
;
2381 b
= xbuffer_to_renderbuffer(buffer
);
2385 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_NONE_EXT
)
2386 return; /* BadMatch error */
2388 rb
= drawable
->mesa_buffer
.Attachment
[b
].Renderbuffer
;
2390 /* invalid buffer */
2393 xrb
= xmesa_renderbuffer(rb
);
2396 switch (drawable
->TextureTarget
) {
2397 case GLX_TEXTURE_1D_EXT
:
2398 texObj
= texUnit
->Current1D
;
2400 case GLX_TEXTURE_2D_EXT
:
2401 texObj
= texUnit
->Current2D
;
2403 case GLX_TEXTURE_RECTANGLE_EXT
:
2404 texObj
= texUnit
->CurrentRect
;
2407 return; /* BadMatch error */
2412 * The following is a quick and simple way to implement
2413 * BindTexImage. The better way is to write some new FetchTexel()
2414 * functions which would extract texels from XImages. We'd still
2415 * need to use XGetImage when texturing from a Pixmap (front buffer)
2416 * but texturing from a back buffer (XImage) would avoid an image
2422 img
= XGetImage(dpy
, xrb
->pixmap
, 0, 0, rb
->Width
, rb
->Height
,
2423 AllPlanes
, ZPixmap
);
2426 else if (xrb
->ximage
) {
2430 /* store the XImage as a new texture image */
2432 GLenum format
, type
, intFormat
;
2433 if (img
->bits_per_pixel
== 32) {
2435 type
= GL_UNSIGNED_BYTE
;
2436 intFormat
= GL_RGBA
;
2438 else if (img
->bits_per_pixel
== 24) {
2440 type
= GL_UNSIGNED_BYTE
;
2443 else if (img
->bits_per_pixel
== 16) {
2445 type
= GL_UNSIGNED_SHORT_5_6_5
;
2449 _mesa_problem(NULL
, "Unexpected XImage format in XMesaBindTexImage");
2452 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGBA_EXT
) {
2453 intFormat
= GL_RGBA
;
2455 else if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGB_EXT
) {
2459 _mesa_TexImage2D(GL_TEXTURE_2D
, 0, intFormat
, rb
->Width
, rb
->Height
, 0,
2460 format
, type
, img
->data
);
2463 XMesaDestroyImage(img
);
2471 XMesaReleaseTexImage(Display
*dpy
, XMesaBuffer drawable
, int buffer
)
2473 const GLint b
= xbuffer_to_renderbuffer(buffer
);