2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * All the XMesa* API functions.
33 * The window coordinate system origin (0,0) is in the lower-left corner
34 * of the window. X11's window coordinate origin is in the upper-left
35 * corner of the window. Therefore, most drawing functions in this
36 * file have to flip Y coordinates.
38 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
39 * in support for the MIT Shared Memory extension. If enabled, when you
40 * use an Ximage for the back buffer in double buffered mode, the "swap"
41 * operation will be faster. You must also link with -lXext.
43 * Byte swapping: If the Mesa host and the X display use a different
44 * byte order then there's some trickiness to be aware of when using
45 * XImages. The byte ordering used for the XImage is that of the X
46 * display, not the Mesa host.
47 * The color-to-pixel encoding for True/DirectColor must be done
48 * according to the display's visual red_mask, green_mask, and blue_mask.
49 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
50 * do byte swapping if needed. If one wants to directly "poke" the pixel
51 * into the XImage's buffer then the pixel must be byte swapped first. In
52 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
53 * and use XPutPixel everywhere except in the implementation of
54 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
55 * instead of using XPutPixel we "poke" our values after byte-swapping
56 * the clear pixel value if needed.
65 #include "glxheader.h"
67 #include "main/context.h"
68 #include "main/extensions.h"
69 #include "main/framebuffer.h"
70 #include "main/imports.h"
71 #include "main/macros.h"
72 #include "main/renderbuffer.h"
73 #include "main/teximage.h"
74 #include "glapi/glthread.h"
75 #include "swrast/swrast.h"
76 #include "swrast_setup/swrast_setup.h"
79 #include "tnl/t_context.h"
80 #include "tnl/t_pipeline.h"
81 #include "drivers/common/driverfuncs.h"
82 #include "drivers/common/meta.h"
85 * Global X driver lock
87 _glthread_Mutex _xmesa_lock
;
92 * Lookup tables for HPCR pixel format:
94 static short hpcr_rgbTbl
[3][256] = {
96 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
97 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
98 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
99 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
100 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
101 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
102 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
103 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
104 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
105 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
106 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
107 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
108 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
109 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
110 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
111 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
114 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
115 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
116 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
117 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
118 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
119 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
120 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
121 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
122 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
123 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
124 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
125 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
126 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
127 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
128 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
129 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
132 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
133 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
134 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
135 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
136 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
137 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
138 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
139 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
140 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
141 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
142 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
143 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
144 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
145 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
146 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
147 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
153 /**********************************************************************/
154 /***** X Utility Functions *****/
155 /**********************************************************************/
159 * Return the host's byte order as LSBFirst or MSBFirst ala X.
161 #ifndef XFree86Server
162 static int host_byte_order( void )
165 char *cptr
= (char *) &i
;
166 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
172 * Check if the X Shared Memory extension is available.
173 * Return: 0 = not available
174 * 1 = shared XImage support available
175 * 2 = shared Pixmap support available also
177 static int check_for_xshm( XMesaDisplay
*display
)
179 #if defined(USE_XSHM) && !defined(XFree86Server)
180 int major
, minor
, ignore
;
183 if (XQueryExtension( display
, "MIT-SHM", &ignore
, &ignore
, &ignore
)) {
184 if (XShmQueryVersion( display
, &major
, &minor
, &pixmaps
)==True
) {
185 return (pixmaps
==True
) ? 2 : 1;
195 /* No XSHM support */
202 * Apply gamma correction to an intensity value in [0..max]. Return the
203 * new intensity value.
206 gamma_adjust( GLfloat gamma
, GLint value
, GLint max
)
212 double x
= (double) value
/ (double) max
;
213 return IROUND_POS((GLfloat
) max
* _mesa_pow(x
, 1.0F
/gamma
));
220 * Return the true number of bits per pixel for XImages.
221 * For example, if we request a 24-bit deep visual we may actually need/get
222 * 32bpp XImages. This function returns the appropriate bpp.
223 * Input: dpy - the X display
224 * visinfo - desribes the visual to be used for XImages
225 * Return: true number of bits per pixel for XImages
228 bits_per_pixel( XMesaVisual xmv
)
231 const int depth
= xmv
->nplanes
;
234 for (i
= 0; i
< screenInfo
.numPixmapFormats
; i
++) {
235 if (screenInfo
.formats
[i
].depth
== depth
)
236 return screenInfo
.formats
[i
].bitsPerPixel
;
238 return depth
; /* should never get here, but this should be safe */
240 XMesaDisplay
*dpy
= xmv
->display
;
241 XMesaVisualInfo visinfo
= xmv
->visinfo
;
244 /* Create a temporary XImage */
245 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
246 ZPixmap
, 0, /*format, offset*/
247 (char*) MALLOC(8), /*data*/
248 1, 1, /*width, height*/
253 /* grab the bits/pixel value */
254 bitsPerPixel
= img
->bits_per_pixel
;
255 /* free the XImage */
256 _mesa_free( img
->data
);
258 XMesaDestroyImage( img
);
266 * Determine if a given X window ID is valid (window exists).
267 * Do this by calling XGetWindowAttributes() for the window and
268 * checking if we catch an X error.
269 * Input: dpy - the display
270 * win - the window to check for existance
271 * Return: GL_TRUE - window exists
272 * GL_FALSE - window doesn't exist
274 #ifndef XFree86Server
275 static GLboolean WindowExistsFlag
;
277 static int window_exists_err_handler( XMesaDisplay
* dpy
, XErrorEvent
* xerr
)
280 if (xerr
->error_code
== BadWindow
) {
281 WindowExistsFlag
= GL_FALSE
;
286 static GLboolean
window_exists( XMesaDisplay
*dpy
, Window win
)
288 XWindowAttributes wa
;
289 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
290 WindowExistsFlag
= GL_TRUE
;
291 old_handler
= XSetErrorHandler(window_exists_err_handler
);
292 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
293 XSetErrorHandler(old_handler
);
294 return WindowExistsFlag
;
298 get_drawable_size( XMesaDisplay
*dpy
, Drawable d
, GLuint
*width
, GLuint
*height
)
303 unsigned int w
, h
, bw
, depth
;
304 stat
= XGetGeometry(dpy
, d
, &root
, &xpos
, &ypos
, &w
, &h
, &bw
, &depth
);
313 * Return the size of the window (or pixmap) that corresponds to the
315 * \param width returns width in pixels
316 * \param height returns height in pixels
319 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
320 GLuint
*width
, GLuint
*height
)
323 *width
= MIN2(b
->frontxrb
->drawable
->width
, MAX_WIDTH
);
324 *height
= MIN2(b
->frontxrb
->drawable
->height
, MAX_HEIGHT
);
328 _glthread_LOCK_MUTEX(_xmesa_lock
);
329 XSync(b
->xm_visual
->display
, 0); /* added for Chromium */
330 stat
= get_drawable_size(dpy
, b
->frontxrb
->pixmap
, width
, height
);
331 _glthread_UNLOCK_MUTEX(_xmesa_lock
);
334 /* probably querying a window that's recently been destroyed */
335 _mesa_warning(NULL
, "XGetGeometry failed!\n");
336 *width
= *height
= 1;
343 /**********************************************************************/
344 /***** Linked list of XMesaBuffers *****/
345 /**********************************************************************/
347 XMesaBuffer XMesaBufferList
= NULL
;
351 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
352 * Note that XMesaBuffer is derived from GLframebuffer.
353 * The new XMesaBuffer will not have any size (Width=Height=0).
355 * \param d the corresponding X drawable (window or pixmap)
356 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
357 * \param vis the buffer's visual
358 * \param cmap the window's colormap, if known.
359 * \return new XMesaBuffer or NULL if any problem
362 create_xmesa_buffer(XMesaDrawable d
, BufferType type
,
363 XMesaVisual vis
, XMesaColormap cmap
)
367 ASSERT(type
== WINDOW
|| type
== PIXMAP
|| type
== PBUFFER
);
369 b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
373 b
->display
= vis
->display
;
378 _mesa_initialize_window_framebuffer(&b
->mesa_buffer
, &vis
->mesa_visual
);
379 b
->mesa_buffer
.Delete
= xmesa_delete_framebuffer
;
384 b
->frontxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_FALSE
);
389 b
->frontxrb
->Parent
= b
;
390 b
->frontxrb
->drawable
= d
;
391 b
->frontxrb
->pixmap
= (XMesaPixmap
) d
;
392 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_FRONT_LEFT
,
398 if (vis
->mesa_visual
.doubleBufferMode
) {
399 b
->backxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_TRUE
);
401 /* XXX free front xrb too */
405 b
->backxrb
->Parent
= b
;
406 /* determine back buffer implementation */
407 b
->db_mode
= vis
->ximage_flag
? BACK_XIMAGE
: BACK_PIXMAP
;
409 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_BACK_LEFT
,
414 * Software alpha planes
416 if (vis
->mesa_visual
.alphaBits
> 0
417 && vis
->undithered_pf
!= PF_8A8B8G8R
418 && vis
->undithered_pf
!= PF_8A8R8G8B
) {
419 /* Visual has alpha, but pixel format doesn't support it.
420 * We'll use an alpha renderbuffer wrapper.
422 b
->swAlpha
= GL_TRUE
;
425 b
->swAlpha
= GL_FALSE
;
429 * Other renderbuffer (depth, stencil, etc)
431 _mesa_add_soft_renderbuffers(&b
->mesa_buffer
,
432 GL_FALSE
, /* color */
433 vis
->mesa_visual
.haveDepthBuffer
,
434 vis
->mesa_visual
.haveStencilBuffer
,
435 vis
->mesa_visual
.haveAccumBuffer
,
437 vis
->mesa_visual
.numAuxBuffers
> 0 );
439 /* GLX_EXT_texture_from_pixmap */
440 b
->TextureTarget
= 0;
441 b
->TextureFormat
= GLX_TEXTURE_FORMAT_NONE_EXT
;
442 b
->TextureMipmap
= 0;
444 /* insert buffer into linked list */
445 b
->Next
= XMesaBufferList
;
453 * Find an XMesaBuffer by matching X display and colormap but NOT matching
454 * the notThis buffer.
457 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
)
460 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
461 if (b
->display
==dpy
&& b
->cmap
==cmap
&& b
!=notThis
) {
470 * Remove buffer from linked list, delete if no longer referenced.
473 xmesa_free_buffer(XMesaBuffer buffer
)
475 XMesaBuffer prev
= NULL
, b
;
477 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
479 struct gl_framebuffer
*fb
= &buffer
->mesa_buffer
;
481 /* unlink buffer from list */
483 prev
->Next
= buffer
->Next
;
485 XMesaBufferList
= buffer
->Next
;
487 /* mark as delete pending */
488 fb
->DeletePending
= GL_TRUE
;
490 /* Since the X window for the XMesaBuffer is going away, we don't
491 * want to dereference this pointer in the future.
493 b
->frontxrb
->drawable
= 0;
495 /* Unreference. If count = zero we'll really delete the buffer */
496 _mesa_reference_framebuffer(&fb
, NULL
);
500 /* continue search */
503 /* buffer not found in XMesaBufferList */
504 _mesa_problem(NULL
,"xmesa_free_buffer() - buffer not found\n");
509 * Copy X color table stuff from one XMesaBuffer to another.
512 copy_colortable_info(XMesaBuffer dst
, const XMesaBuffer src
)
514 MEMCPY(dst
->color_table
, src
->color_table
, sizeof(src
->color_table
));
515 MEMCPY(dst
->pixel_to_r
, src
->pixel_to_r
, sizeof(src
->pixel_to_r
));
516 MEMCPY(dst
->pixel_to_g
, src
->pixel_to_g
, sizeof(src
->pixel_to_g
));
517 MEMCPY(dst
->pixel_to_b
, src
->pixel_to_b
, sizeof(src
->pixel_to_b
));
518 dst
->num_alloced
= src
->num_alloced
;
519 MEMCPY(dst
->alloced_colors
, src
->alloced_colors
,
520 sizeof(src
->alloced_colors
));
525 /**********************************************************************/
526 /***** Misc Private Functions *****/
527 /**********************************************************************/
531 * A replacement for XAllocColor. This function should never
532 * fail to allocate a color. When XAllocColor fails, we return
533 * the nearest matching color. If we have to allocate many colors
534 * this function isn't too efficient; the XQueryColors() could be
536 * Written by Michael Pichler, Brian Paul, Mark Kilgard
537 * Input: dpy - X display
539 * cmapSize - size of colormap
540 * In/Out: color - the XColor struct
541 * Output: exact - 1=exact color match, 0=closest match
542 * alloced - 1=XAlloc worked, 0=XAlloc failed
545 noFaultXAllocColor( int client
,
550 int *exact
, int *alloced
)
556 /* we'll try to cache ctable for better remote display performance */
557 static Display
*prevDisplay
= NULL
;
558 static XMesaColormap prevCmap
= 0;
559 static int prevCmapSize
= 0;
560 static XMesaColor
*ctable
= NULL
;
564 double mindist
; /* 3*2^16^2 exceeds long int precision. */
568 /* First try just using XAllocColor. */
571 &color
->red
, &color
->green
, &color
->blue
,
575 if (XAllocColor(dpy
, cmap
, color
))
583 /* Alloc failed, search for closest match */
585 /* Retrieve color table entries. */
586 /* XXX alloca candidate. */
588 ppixIn
= (Pixel
*) MALLOC(cmapSize
* sizeof(Pixel
));
589 ctable
= (xrgb
*) MALLOC(cmapSize
* sizeof(xrgb
));
590 for (i
= 0; i
< cmapSize
; i
++) {
593 QueryColors(cmap
, cmapSize
, ppixIn
, ctable
);
595 if (prevDisplay
!= dpy
|| prevCmap
!= cmap
596 || prevCmapSize
!= cmapSize
|| !ctable
) {
597 /* free previously cached color table */
600 /* Get the color table from X */
601 ctable
= (XMesaColor
*) MALLOC(cmapSize
* sizeof(XMesaColor
));
603 for (i
= 0; i
< cmapSize
; i
++) {
606 XQueryColors(dpy
, cmap
, ctable
, cmapSize
);
609 prevCmapSize
= cmapSize
;
613 /* Find best match. */
616 for (i
= 0; i
< cmapSize
; i
++) {
617 double dr
= 0.30 * ((double) color
->red
- (double) ctable
[i
].red
);
618 double dg
= 0.59 * ((double) color
->green
- (double) ctable
[i
].green
);
619 double db
= 0.11 * ((double) color
->blue
- (double) ctable
[i
].blue
);
620 double dist
= dr
* dr
+ dg
* dg
+ db
* db
;
621 if (bestmatch
< 0 || dist
< mindist
) {
628 subColor
.red
= ctable
[bestmatch
].red
;
629 subColor
.green
= ctable
[bestmatch
].green
;
630 subColor
.blue
= ctable
[bestmatch
].blue
;
631 /* Try to allocate the closest match color. This should only
632 * fail if the cell is read/write. Otherwise, we're incrementing
633 * the cell's reference count.
637 &subColor
.red
, &subColor
.green
, &subColor
.blue
,
639 client
) == Success
) {
641 if (XAllocColor(dpy
, cmap
, &subColor
)) {
646 /* do this to work around a problem reported by Frank Ortega */
647 subColor
.pixel
= (unsigned long) bestmatch
;
648 subColor
.red
= ctable
[bestmatch
].red
;
649 subColor
.green
= ctable
[bestmatch
].green
;
650 subColor
.blue
= ctable
[bestmatch
].blue
;
651 subColor
.flags
= DoRed
| DoGreen
| DoBlue
;
658 /* don't free table, save it for next time */
668 * Do setup for PF_GRAYSCALE pixel format.
669 * Note that buffer may be NULL.
672 setup_grayscale(int client
, XMesaVisual v
,
673 XMesaBuffer buffer
, XMesaColormap cmap
)
675 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
680 XMesaBuffer prevBuffer
;
686 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
688 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
689 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
690 /* Copy colormap stuff from previous XMesaBuffer which uses same
691 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
693 copy_colortable_info(buffer
, prevBuffer
);
696 /* Allocate 256 shades of gray */
698 int colorsfailed
= 0;
699 for (gray
=0;gray
<256;gray
++) {
700 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
701 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
702 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
705 xcol
.red
= (r
<< 8) | r
;
706 xcol
.green
= (g
<< 8) | g
;
707 xcol
.blue
= (b
<< 8) | b
;
708 noFaultXAllocColor( client
, v
->display
,
709 cmap
, GET_COLORMAP_SIZE(v
),
710 &xcol
, &exact
, &alloced
);
715 assert(buffer
->num_alloced
<256);
716 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
717 buffer
->num_alloced
++;
722 buffer->color_table[gray*3+0] = xcol.pixel;
723 buffer->color_table[gray*3+1] = xcol.pixel;
724 buffer->color_table[gray*3+2] = xcol.pixel;
725 assert(xcol.pixel < 65536);
726 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
727 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
728 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
730 buffer
->color_table
[gray
] = xcol
.pixel
;
731 assert(xcol
.pixel
< 65536);
732 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
733 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
734 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
737 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
739 "Note: %d out of 256 needed colors do not match exactly.\n",
745 v
->dithered_pf
= PF_Grayscale
;
746 v
->undithered_pf
= PF_Grayscale
;
753 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
754 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
755 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
756 * color. While this function was originally designed just for 8-bit
757 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
758 * Dithering code contributed by Bob Mercier.
761 setup_dithered_color(int client
, XMesaVisual v
,
762 XMesaBuffer buffer
, XMesaColormap cmap
)
764 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
769 XMesaBuffer prevBuffer
;
775 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
777 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
778 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
779 /* Copy colormap stuff from previous, matching XMesaBuffer.
780 * Do this to avoid time spent in noFaultXAllocColor.
782 copy_colortable_info(buffer
, prevBuffer
);
785 /* Allocate X colors and initialize color_table[], red_table[], etc */
787 int colorsfailed
= 0;
788 for (r
= 0; r
< DITH_R
; r
++) {
789 for (g
= 0; g
< DITH_G
; g
++) {
790 for (b
= 0; b
< DITH_B
; b
++) {
793 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(DITH_R
-1),65535);
794 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(DITH_G
-1),65535);
795 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(DITH_B
-1),65535);
796 noFaultXAllocColor( client
, v
->display
,
797 cmap
, GET_COLORMAP_SIZE(v
),
798 &xcol
, &exact
, &alloced
);
803 assert(buffer
->num_alloced
<256);
804 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
805 buffer
->num_alloced
++;
807 i
= DITH_MIX( r
, g
, b
);
809 buffer
->color_table
[i
] = xcol
.pixel
;
810 assert(xcol
.pixel
< 65536);
811 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (DITH_R
-1);
812 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (DITH_G
-1);
813 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (DITH_B
-1);
818 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
820 "Note: %d out of %d needed colors do not match exactly.\n",
821 colorsfailed
, DITH_R
* DITH_G
* DITH_B
);
826 v
->dithered_pf
= PF_Dither
;
827 v
->undithered_pf
= PF_Lookup
;
833 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
834 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
835 * Special dithering tables have to be initialized.
838 setup_8bit_hpcr(XMesaVisual v
)
840 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
841 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
842 * on the root window AND the colormap obtainable by XGetRGBColormaps
843 * for that atom must be set on the window. (see also tkInitWindow)
844 * If that colormap is not set, the output will look stripy.
847 /* Setup color tables with gamma correction */
851 g
= 1.0 / v
->RedGamma
;
852 for (i
=0; i
<256; i
++) {
853 GLint red
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[0][i
]/255.0, g
));
854 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
857 g
= 1.0 / v
->GreenGamma
;
858 for (i
=0; i
<256; i
++) {
859 GLint green
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[1][i
]/255.0, g
));
860 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
863 g
= 1.0 / v
->BlueGamma
;
864 for (i
=0; i
<256; i
++) {
865 GLint blue
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[2][i
]/255.0, g
));
866 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
868 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
869 v
->dithered_pf
= PF_HPCR
;
871 /* which method should I use to clear */
872 /* GL_FALSE: keep the ordinary method */
873 /* GL_TRUE : clear with dither pattern */
874 v
->hpcr_clear_flag
= _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
876 if (v
->hpcr_clear_flag
) {
877 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
878 DefaultRootWindow(v
->display
),
880 #ifndef XFree86Server
881 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
882 0, 0, 16, 2, AllPlanes
, ZPixmap
);
889 * Setup RGB rendering for a window with a True/DirectColor visual.
892 setup_truecolor(XMesaVisual v
, XMesaBuffer buffer
, XMesaColormap cmap
)
894 unsigned long rmask
, gmask
, bmask
;
898 /* Compute red multiplier (mask) and bit shift */
900 rmask
= GET_REDMASK(v
);
901 while ((rmask
& 1)==0) {
906 /* Compute green multiplier (mask) and bit shift */
908 gmask
= GET_GREENMASK(v
);
909 while ((gmask
& 1)==0) {
914 /* Compute blue multiplier (mask) and bit shift */
916 bmask
= GET_BLUEMASK(v
);
917 while ((bmask
& 1)==0) {
923 * Compute component-to-pixel lookup tables and dithering kernel
926 static GLubyte kernel
[16] = {
927 0*16, 8*16, 2*16, 10*16,
928 12*16, 4*16, 14*16, 6*16,
929 3*16, 11*16, 1*16, 9*16,
930 15*16, 7*16, 13*16, 5*16,
932 GLint rBits
= _mesa_bitcount(rmask
);
933 GLint gBits
= _mesa_bitcount(gmask
);
934 GLint bBits
= _mesa_bitcount(bmask
);
938 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
939 for (i
=0; i
<=rmask
; i
++)
940 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
941 for (i
=0; i
<=gmask
; i
++)
942 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
943 for (i
=0; i
<=bmask
; i
++)
944 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
946 /* convert RGB values from [0,255] to pixel components */
948 for (i
=0;i
<256;i
++) {
949 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
950 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
951 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
952 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
953 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
954 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
956 /* overflow protection */
957 for (i
=256;i
<512;i
++) {
958 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
959 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
960 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
963 /* setup dithering kernel */
965 if (gBits
> maxBits
) maxBits
= gBits
;
966 if (bBits
> maxBits
) maxBits
= bBits
;
968 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
971 v
->undithered_pf
= PF_Truecolor
;
972 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_Dither_True
: PF_Truecolor
;
976 * Now check for TrueColor visuals which we can optimize.
978 if ( GET_REDMASK(v
) ==0x0000ff
979 && GET_GREENMASK(v
)==0x00ff00
980 && GET_BLUEMASK(v
) ==0xff0000
981 && CHECK_BYTE_ORDER(v
)
982 && v
->BitsPerPixel
==32
983 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
984 /* common 32 bpp config used on SGI, Sun */
985 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
; /* ABGR */
987 else if (GET_REDMASK(v
) == 0xff0000
988 && GET_GREENMASK(v
)== 0x00ff00
989 && GET_BLUEMASK(v
) == 0x0000ff
990 && CHECK_BYTE_ORDER(v
)
991 && v
->RedGamma
== 1.0 && v
->GreenGamma
== 1.0 && v
->BlueGamma
== 1.0){
992 if (v
->BitsPerPixel
==32) {
993 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
994 if (GET_VISUAL_DEPTH(v
) == 32 && v
->mesa_visual
.alphaBits
== 8)
995 v
->undithered_pf
= v
->dithered_pf
= PF_8A8R8G8B
; /* ARGB */
997 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
; /* xRGB */
999 else if (v
->BitsPerPixel
== 24) {
1000 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
; /* RGB */
1003 else if (GET_REDMASK(v
) ==0xf800
1004 && GET_GREENMASK(v
)==0x07e0
1005 && GET_BLUEMASK(v
) ==0x001f
1006 && CHECK_BYTE_ORDER(v
)
1007 && v
->BitsPerPixel
==16
1008 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1010 v
->undithered_pf
= PF_5R6G5B
;
1011 v
->dithered_pf
= PF_Dither_5R6G5B
;
1013 else if (GET_REDMASK(v
) ==0xe0
1014 && GET_GREENMASK(v
)==0x1c
1015 && GET_BLUEMASK(v
) ==0x03
1016 && CHECK_FOR_HPCR(v
)) {
1017 /* 8-bit HP color recovery */
1018 setup_8bit_hpcr( v
);
1025 * Setup RGB rendering for a window with a monochrome visual.
1028 setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
1031 v
->dithered_pf
= v
->undithered_pf
= PF_1Bit
;
1032 /* if black=1 then we must flip pixel values */
1033 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
1039 * When a context is bound for the first time, we can finally finish
1040 * initializing the context's visual and buffer information.
1041 * \param v the XMesaVisual to initialize
1042 * \param b the XMesaBuffer to initialize (may be NULL)
1043 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1044 * \param window the window/pixmap we're rendering into
1045 * \param cmap the colormap associated with the window/pixmap
1046 * \return GL_TRUE=success, GL_FALSE=failure
1049 initialize_visual_and_buffer(XMesaVisual v
, XMesaBuffer b
,
1050 GLboolean rgb_flag
, XMesaDrawable window
,
1055 #ifdef XFree86Server
1056 client
= (window
) ? CLIENT_ID(window
->id
) : 0;
1059 ASSERT(!b
|| b
->xm_visual
== v
);
1061 /* Save true bits/pixel */
1062 v
->BitsPerPixel
= bits_per_pixel(v
);
1063 assert(v
->BitsPerPixel
> 0);
1065 if (rgb_flag
== GL_FALSE
) {
1066 /* COLOR-INDEXED WINDOW:
1067 * Even if the visual is TrueColor or DirectColor we treat it as
1068 * being color indexed. This is weird but might be useful to someone.
1070 v
->dithered_pf
= v
->undithered_pf
= PF_Index
;
1071 v
->mesa_visual
.indexBits
= GET_VISUAL_DEPTH(v
);
1075 * We support RGB rendering into almost any kind of visual.
1077 const int xclass
= v
->mesa_visual
.visualType
;
1078 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1079 setup_truecolor( v
, b
, cmap
);
1081 else if (xclass
== GLX_STATIC_GRAY
&& GET_VISUAL_DEPTH(v
) == 1) {
1082 setup_monochrome( v
, b
);
1084 else if (xclass
== GLX_GRAY_SCALE
|| xclass
== GLX_STATIC_GRAY
) {
1085 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1089 else if ((xclass
== GLX_PSEUDO_COLOR
|| xclass
== GLX_STATIC_COLOR
)
1090 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1091 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1096 _mesa_warning(NULL
, "XMesa: RGB mode rendering not supported in given visual.\n");
1099 v
->mesa_visual
.indexBits
= 0;
1101 if (_mesa_getenv("MESA_NO_DITHER")) {
1102 v
->dithered_pf
= v
->undithered_pf
;
1108 * If MESA_INFO env var is set print out some debugging info
1109 * which can help Brian figure out what's going on when a user
1112 if (_mesa_getenv("MESA_INFO")) {
1113 _mesa_printf("X/Mesa visual = %p\n", (void *) v
);
1114 _mesa_printf("X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1115 _mesa_printf("X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1116 _mesa_printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
1117 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1118 _mesa_printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1124 /* Do window-specific initializations */
1126 /* these should have been set in create_xmesa_buffer */
1127 ASSERT(b
->frontxrb
->drawable
== window
);
1128 ASSERT(b
->frontxrb
->pixmap
== (XMesaPixmap
) window
);
1130 /* Setup for single/double buffering */
1131 if (v
->mesa_visual
.doubleBufferMode
) {
1132 /* Double buffered */
1133 b
->shm
= check_for_xshm( v
->display
);
1136 /* X11 graphics contexts */
1137 #ifdef XFree86Server
1138 b
->gc
= CreateScratchGC(v
->display
, window
->depth
);
1140 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1142 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1144 /* cleargc - for glClear() */
1145 #ifdef XFree86Server
1146 b
->cleargc
= CreateScratchGC(v
->display
, window
->depth
);
1148 b
->cleargc
= XCreateGC( v
->display
, window
, 0, NULL
);
1150 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1153 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1154 * Patch contributed by Michael Pichler May 15, 1995.
1156 #ifdef XFree86Server
1157 b
->swapgc
= CreateScratchGC(v
->display
, window
->depth
);
1161 dixChangeGC(NullClient
, b
->swapgc
, GCGraphicsExposures
, v
, NULL
);
1166 gcvalues
.graphics_exposures
= False
;
1167 b
->swapgc
= XCreateGC(v
->display
, window
,
1168 GCGraphicsExposures
, &gcvalues
);
1171 XMesaSetFunction( v
->display
, b
->swapgc
, GXcopy
);
1173 * Set fill style and tile pixmap once for all for HPCR stuff
1174 * (instead of doing it each time in clear_color_HPCR_pixmap())
1175 * Initialize whole stuff
1176 * Patch contributed by Jacques Leroy March 8, 1998.
1178 if (v
->hpcr_clear_flag
&& b
->backxrb
&& b
->backxrb
->pixmap
) {
1180 for (i
= 0; i
< 16; i
++) {
1181 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1182 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1184 XMesaPutImage(b
->display
, (XMesaDrawable
) v
->hpcr_clear_pixmap
,
1185 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1186 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1187 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1190 /* Initialize the row buffer XImage for use in write_color_span() */
1191 data
= (char*) MALLOC(MAX_WIDTH
*4);
1192 #ifdef XFree86Server
1193 b
->rowimage
= XMesaCreateImage(GET_VISUAL_DEPTH(v
), MAX_WIDTH
, 1, data
);
1195 b
->rowimage
= XCreateImage( v
->display
,
1198 ZPixmap
, 0, /*format, offset*/
1200 MAX_WIDTH
, 1, /*width, height*/
1202 0 /*bytes_per_line*/ );
1214 * Convert an RGBA color to a pixel value.
1217 xmesa_color_to_pixel(GLcontext
*ctx
,
1218 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1221 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1222 switch (pixelFormat
) {
1228 PACK_TRUECOLOR( p
, r
, g
, b
);
1232 return PACK_8A8B8G8R( r
, g
, b
, a
);
1234 return PACK_8A8R8G8B( r
, g
, b
, a
);
1238 return PACK_8R8G8B( r
, g
, b
);
1240 return PACK_5R6G5B( r
, g
, b
);
1244 return DITHER( 1, 0, r
, g
, b
);
1247 /* 382 = (3*255)/2 */
1248 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1250 return DITHER_HPCR(1, 1, r
, g
, b
);
1254 return LOOKUP( r
, g
, b
);
1257 return GRAY_RGB( r
, g
, b
);
1258 case PF_Dither_True
:
1260 case PF_Dither_5R6G5B
:
1263 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1267 _mesa_problem(ctx
, "Bad pixel format in xmesa_color_to_pixel");
1273 #define NUM_VISUAL_TYPES 6
1276 * Convert an X visual type to a GLX visual type.
1278 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1280 * \return If \c visualType is a valid X visual type, a GLX visual type will
1281 * be returned. Otherwise \c GLX_NONE will be returned.
1284 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1288 xmesa_convert_from_x_visual_type( int visualType
)
1290 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
1291 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
1292 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
1293 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
1296 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
1297 ? glx_visual_types
[ visualType
] : GLX_NONE
;
1301 /**********************************************************************/
1302 /***** Public Functions *****/
1303 /**********************************************************************/
1307 * Create a new X/Mesa visual.
1308 * Input: display - X11 display
1309 * visinfo - an XVisualInfo pointer
1310 * rgb_flag - GL_TRUE = RGB mode,
1311 * GL_FALSE = color index mode
1312 * alpha_flag - alpha buffer requested?
1313 * db_flag - GL_TRUE = double-buffered,
1314 * GL_FALSE = single buffered
1315 * stereo_flag - stereo visual?
1316 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1317 * GL_FALSE = use an off-screen pixmap for back buffer
1318 * depth_size - requested bits/depth values, or zero
1319 * stencil_size - requested bits/stencil values, or zero
1320 * accum_red_size - requested bits/red accum values, or zero
1321 * accum_green_size - requested bits/green accum values, or zero
1322 * accum_blue_size - requested bits/blue accum values, or zero
1323 * accum_alpha_size - requested bits/alpha accum values, or zero
1324 * num_samples - number of samples/pixel if multisampling, or zero
1325 * level - visual level, usually 0
1326 * visualCaveat - ala the GLX extension, usually GLX_NONE
1327 * Return; a new XMesaVisual or 0 if error.
1330 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1331 XMesaVisualInfo visinfo
,
1333 GLboolean alpha_flag
,
1335 GLboolean stereo_flag
,
1336 GLboolean ximage_flag
,
1339 GLint accum_red_size
,
1340 GLint accum_green_size
,
1341 GLint accum_blue_size
,
1342 GLint accum_alpha_size
,
1345 GLint visualCaveat
)
1349 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1351 #ifndef XFree86Server
1352 /* For debugging only */
1353 if (_mesa_getenv("MESA_XSYNC")) {
1354 /* This makes debugging X easier.
1355 * In your debugger, set a breakpoint on _XError to stop when an
1356 * X protocol error is generated.
1358 XSynchronize( display
, 1 );
1362 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1367 v
->display
= display
;
1369 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1370 * the struct but we may need some of the information contained in it
1373 #ifndef XFree86Server
1374 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1379 MEMCPY(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1382 /* check for MESA_GAMMA environment variable */
1383 gamma
= _mesa_getenv("MESA_GAMMA");
1385 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1386 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1387 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1388 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1389 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1392 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1395 v
->ximage_flag
= ximage_flag
;
1397 #ifdef XFree86Server
1398 /* We could calculate these values by ourselves. nplanes is either the sum
1399 * of the red, green, and blue bits or the number index bits.
1400 * ColormapEntries is either (1U << index_bits) or
1401 * (1U << max(redBits, greenBits, blueBits)).
1403 assert(visinfo
->nplanes
> 0);
1404 v
->nplanes
= visinfo
->nplanes
;
1405 v
->ColormapEntries
= visinfo
->ColormapEntries
;
1407 v
->mesa_visual
.redMask
= visinfo
->redMask
;
1408 v
->mesa_visual
.greenMask
= visinfo
->greenMask
;
1409 v
->mesa_visual
.blueMask
= visinfo
->blueMask
;
1410 v
->mesa_visual
.visualID
= visinfo
->vid
;
1411 v
->mesa_visual
.screen
= 0; /* FIXME: What should be done here? */
1413 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
1414 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
1415 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
1416 v
->mesa_visual
.visualID
= visinfo
->visualid
;
1417 v
->mesa_visual
.screen
= visinfo
->screen
;
1420 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1421 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
1423 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
1426 v
->mesa_visual
.visualRating
= visualCaveat
;
1429 v
->mesa_visual
.alphaBits
= 8;
1431 (void) initialize_visual_and_buffer( v
, NULL
, rgb_flag
, 0, 0 );
1434 const int xclass
= v
->mesa_visual
.visualType
;
1435 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1436 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
1437 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
1438 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
1441 /* this is an approximation */
1443 depth
= GET_VISUAL_DEPTH(v
);
1444 red_bits
= depth
/ 3;
1446 green_bits
= depth
/ 2;
1447 depth
-= green_bits
;
1450 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1452 alpha_bits
= v
->mesa_visual
.alphaBits
;
1455 _mesa_initialize_visual( &v
->mesa_visual
,
1456 rgb_flag
, db_flag
, stereo_flag
,
1457 red_bits
, green_bits
,
1458 blue_bits
, alpha_bits
,
1459 v
->mesa_visual
.indexBits
,
1462 accum_red_size
, accum_green_size
,
1463 accum_blue_size
, accum_alpha_size
,
1466 /* XXX minor hack */
1467 v
->mesa_visual
.level
= level
;
1473 void XMesaDestroyVisual( XMesaVisual v
)
1475 #ifndef XFree86Server
1476 _mesa_free(v
->visinfo
);
1484 * Create a new XMesaContext.
1485 * \param v the XMesaVisual
1486 * \param share_list another XMesaContext with which to share display
1487 * lists or NULL if no sharing is wanted.
1488 * \return an XMesaContext or NULL if error.
1491 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1493 static GLboolean firstTime
= GL_TRUE
;
1496 struct dd_function_table functions
;
1500 _glthread_INIT_MUTEX(_xmesa_lock
);
1501 firstTime
= GL_FALSE
;
1504 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1505 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1509 mesaCtx
= &(c
->mesa
);
1511 /* initialize with default driver functions, then plug in XMesa funcs */
1512 _mesa_init_driver_functions(&functions
);
1513 xmesa_init_driver_functions(v
, &functions
);
1514 if (!_mesa_initialize_context(mesaCtx
, &v
->mesa_visual
,
1515 share_list
? &(share_list
->mesa
) : (GLcontext
*) NULL
,
1516 &functions
, (void *) c
)) {
1521 /* Enable this to exercise fixed function -> shader translation
1522 * with software rendering.
1525 mesaCtx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1526 mesaCtx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1529 _mesa_enable_sw_extensions(mesaCtx
);
1530 _mesa_enable_1_3_extensions(mesaCtx
);
1531 _mesa_enable_1_4_extensions(mesaCtx
);
1532 _mesa_enable_1_5_extensions(mesaCtx
);
1533 _mesa_enable_2_0_extensions(mesaCtx
);
1534 _mesa_enable_2_1_extensions(mesaCtx
);
1535 #if ENABLE_EXT_texure_compression_s3tc
1536 if (mesaCtx
->Mesa_DXTn
) {
1537 _mesa_enable_extension(mesaCtx
, "GL_EXT_texture_compression_s3tc");
1538 _mesa_enable_extension(mesaCtx
, "GL_S3_s3tc");
1540 _mesa_enable_extension(mesaCtx
, "GL_3DFX_texture_compression_FXT1");
1542 #if ENABLE_EXT_timer_query
1543 _mesa_enable_extension(mesaCtx
, "GL_EXT_timer_query");
1546 #ifdef XFree86Server
1547 /* If we're running in the X server, do bounds checking to prevent
1548 * segfaults and server crashes!
1550 mesaCtx
->Const
.CheckArrayBounds
= GL_TRUE
;
1553 /* finish up xmesa context initializations */
1554 c
->swapbytes
= CHECK_BYTE_ORDER(v
) ? GL_FALSE
: GL_TRUE
;
1556 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1557 c
->display
= v
->display
;
1558 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1560 /* Initialize the software rasterizer and helper modules.
1562 if (!_swrast_CreateContext( mesaCtx
) ||
1563 !_vbo_CreateContext( mesaCtx
) ||
1564 !_tnl_CreateContext( mesaCtx
) ||
1565 !_swsetup_CreateContext( mesaCtx
)) {
1566 _mesa_free_context_data(&c
->mesa
);
1572 tnl
= TNL_CONTEXT(mesaCtx
);
1573 tnl
->Driver
.RunPipeline
= _tnl_run_pipeline
;
1575 xmesa_register_swrast_functions( mesaCtx
);
1576 _swsetup_Wakeup(mesaCtx
);
1578 _mesa_meta_init(mesaCtx
);
1586 void XMesaDestroyContext( XMesaContext c
)
1588 GLcontext
*mesaCtx
= &c
->mesa
;
1591 FXdestroyContext( XMESA_BUFFER(mesaCtx
->DrawBuffer
) );
1594 _mesa_meta_free( mesaCtx
);
1596 _swsetup_DestroyContext( mesaCtx
);
1597 _swrast_DestroyContext( mesaCtx
);
1598 _tnl_DestroyContext( mesaCtx
);
1599 _vbo_DestroyContext( mesaCtx
);
1600 _mesa_free_context_data( mesaCtx
);
1607 * Private function for creating an XMesaBuffer which corresponds to an
1608 * X window or pixmap.
1609 * \param v the window's XMesaVisual
1610 * \param w the window we're wrapping
1611 * \return new XMesaBuffer or NULL if error
1614 XMesaCreateWindowBuffer(XMesaVisual v
, XMesaWindow w
)
1616 #ifndef XFree86Server
1617 XWindowAttributes attr
;
1626 /* Check that window depth matches visual depth */
1627 #ifdef XFree86Server
1628 depth
= ((XMesaDrawable
)w
)->depth
;
1630 XGetWindowAttributes( v
->display
, w
, &attr
);
1633 if (GET_VISUAL_DEPTH(v
) != depth
) {
1634 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1635 GET_VISUAL_DEPTH(v
), depth
);
1640 #ifdef XFree86Server
1641 cmap
= (ColormapPtr
)LookupIDByType(wColormap(w
), RT_COLORMAP
);
1643 if (attr
.colormap
) {
1644 cmap
= attr
.colormap
;
1647 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
1648 /* this is weird, a window w/out a colormap!? */
1649 /* OK, let's just allocate a new one and hope for the best */
1650 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1654 b
= create_xmesa_buffer((XMesaDrawable
) w
, WINDOW
, v
, cmap
);
1658 if (!initialize_visual_and_buffer( v
, b
, v
->mesa_visual
.rgbMode
,
1659 (XMesaDrawable
) w
, cmap
)) {
1660 xmesa_free_buffer(b
);
1670 * Create a new XMesaBuffer from an X pixmap.
1672 * \param v the XMesaVisual
1673 * \param p the pixmap
1674 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1675 * \c GLX_DIRECT_COLOR visual for the pixmap
1676 * \returns new XMesaBuffer or NULL if error
1679 XMesaCreatePixmapBuffer(XMesaVisual v
, XMesaPixmap p
, XMesaColormap cmap
)
1685 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1689 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1690 (XMesaDrawable
) p
, cmap
)) {
1691 xmesa_free_buffer(b
);
1700 * For GLX_EXT_texture_from_pixmap
1703 XMesaCreatePixmapTextureBuffer(XMesaVisual v
, XMesaPixmap p
,
1705 int format
, int target
, int mipmap
)
1707 GET_CURRENT_CONTEXT(ctx
);
1709 GLuint width
, height
;
1713 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1717 /* get pixmap size, update framebuffer/renderbuffer dims */
1718 xmesa_get_window_size(v
->display
, b
, &width
, &height
);
1719 _mesa_resize_framebuffer(NULL
, &(b
->mesa_buffer
), width
, height
);
1723 if (ctx
->Extensions
.ARB_texture_non_power_of_two
) {
1724 target
= GLX_TEXTURE_2D_EXT
;
1726 else if ( _mesa_bitcount(width
) == 1
1727 && _mesa_bitcount(height
) == 1) {
1728 /* power of two size */
1730 target
= GLX_TEXTURE_1D_EXT
;
1733 target
= GLX_TEXTURE_2D_EXT
;
1736 else if (ctx
->Extensions
.NV_texture_rectangle
) {
1737 target
= GLX_TEXTURE_RECTANGLE_EXT
;
1740 /* non power of two textures not supported */
1741 XMesaDestroyBuffer(b
);
1746 b
->TextureTarget
= target
;
1747 b
->TextureFormat
= format
;
1748 b
->TextureMipmap
= mipmap
;
1750 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1751 (XMesaDrawable
) p
, cmap
)) {
1752 xmesa_free_buffer(b
);
1762 XMesaCreatePBuffer(XMesaVisual v
, XMesaColormap cmap
,
1763 unsigned int width
, unsigned int height
)
1765 #ifndef XFree86Server
1767 XMesaDrawable drawable
; /* X Pixmap Drawable */
1770 /* allocate pixmap for front buffer */
1771 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1772 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1777 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1781 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1783 xmesa_free_buffer(b
);
1796 * Deallocate an XMesaBuffer structure and all related info.
1799 XMesaDestroyBuffer(XMesaBuffer b
)
1801 xmesa_free_buffer(b
);
1806 * Query the current window size and update the corresponding GLframebuffer
1807 * and all attached renderbuffers.
1809 * 1. the first time a buffer is bound to a context.
1810 * 2. from glViewport to poll for window size changes
1811 * 3. from the XMesaResizeBuffers() API function.
1812 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1813 * when resizing a buffer when no rendering context is bound.
1816 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
)
1818 GLuint width
, height
;
1819 xmesa_get_window_size(drawBuffer
->display
, drawBuffer
, &width
, &height
);
1820 if (drawBuffer
->mesa_buffer
.Width
!= width
||
1821 drawBuffer
->mesa_buffer
.Height
!= height
) {
1822 GLcontext
*ctx
= xmctx
? &xmctx
->mesa
: NULL
;
1823 _mesa_resize_framebuffer(ctx
, &(drawBuffer
->mesa_buffer
), width
, height
);
1825 drawBuffer
->mesa_buffer
.Initialized
= GL_TRUE
; /* XXX TEMPORARY? */
1830 * Bind buffer b to context c and make c the current rendering context.
1832 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
1834 return XMesaMakeCurrent2( c
, b
, b
);
1839 * Bind buffer b to context c and make c the current rendering context.
1842 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1843 XMesaBuffer readBuffer
)
1846 if (!drawBuffer
|| !readBuffer
)
1847 return GL_FALSE
; /* must specify buffers! */
1849 if (&(c
->mesa
) == _mesa_get_current_context()
1850 && c
->mesa
.DrawBuffer
== &drawBuffer
->mesa_buffer
1851 && c
->mesa
.ReadBuffer
== &readBuffer
->mesa_buffer
1852 && XMESA_BUFFER(c
->mesa
.DrawBuffer
)->wasCurrent
) {
1853 /* same context and buffer, do nothing */
1857 c
->xm_buffer
= drawBuffer
;
1860 if (FXmakeCurrent( drawBuffer
))
1864 /* Call this periodically to detect when the user has begun using
1865 * GL rendering from multiple threads.
1867 _glapi_check_multithread();
1869 xmesa_check_and_update_buffer_size(c
, drawBuffer
);
1870 if (readBuffer
!= drawBuffer
)
1871 xmesa_check_and_update_buffer_size(c
, readBuffer
);
1873 _mesa_make_current(&(c
->mesa
),
1874 &drawBuffer
->mesa_buffer
,
1875 &readBuffer
->mesa_buffer
);
1877 if (c
->xm_visual
->mesa_visual
.rgbMode
) {
1879 * Must recompute and set these pixel values because colormap
1880 * can be different for different windows.
1882 c
->clearpixel
= xmesa_color_to_pixel( &c
->mesa
,
1887 c
->xm_visual
->undithered_pf
);
1888 XMesaSetForeground(c
->display
, drawBuffer
->cleargc
, c
->clearpixel
);
1891 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1892 drawBuffer
->wasCurrent
= GL_TRUE
;
1896 _mesa_make_current( NULL
, NULL
, NULL
);
1903 * Unbind the context c from its buffer.
1905 GLboolean
XMesaUnbindContext( XMesaContext c
)
1907 /* A no-op for XFree86 integration purposes */
1912 XMesaContext
XMesaGetCurrentContext( void )
1914 GET_CURRENT_CONTEXT(ctx
);
1916 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1925 XMesaBuffer
XMesaGetCurrentBuffer( void )
1927 GET_CURRENT_CONTEXT(ctx
);
1929 XMesaBuffer xmbuf
= XMESA_BUFFER(ctx
->DrawBuffer
);
1938 /* New in Mesa 3.1 */
1939 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
1941 GET_CURRENT_CONTEXT(ctx
);
1943 return XMESA_BUFFER(ctx
->ReadBuffer
);
1951 #ifdef XFree86Server
1953 GLboolean
XMesaForceCurrent(XMesaContext c
)
1956 _glapi_set_dispatch(c
->mesa
.CurrentDispatch
);
1958 if (&(c
->mesa
) != _mesa_get_current_context()) {
1959 _mesa_make_current(&c
->mesa
, c
->mesa
.DrawBuffer
, c
->mesa
.ReadBuffer
);
1963 _mesa_make_current(NULL
, NULL
, NULL
);
1970 GLboolean
XMesaLoseCurrent(XMesaContext c
)
1973 _mesa_make_current(NULL
, NULL
, NULL
);
1979 GLboolean
XMesaCopyContext( XMesaContext xm_src
, XMesaContext xm_dst
, GLuint mask
)
1981 _mesa_copy_context(&xm_src
->mesa
, &xm_dst
->mesa
, mask
);
1984 #endif /* XFree86Server */
1988 GLboolean
XMesaSetFXmode( GLint mode
)
1998 * Copy the back buffer to the front buffer. If there's no back buffer
2002 void XMesaSwapBuffers( XMesaBuffer b
)
2004 GET_CURRENT_CONTEXT(ctx
);
2007 /* single buffered */
2011 /* If we're swapping the buffer associated with the current context
2012 * we have to flush any pending rendering commands first.
2014 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2015 _mesa_notifySwapBuffers(ctx
);
2019 if (FXswapBuffers(b
))
2022 if (b
->backxrb
->ximage
) {
2023 /* Copy Ximage (back buf) from client memory to server window */
2024 #if defined(USE_XSHM) && !defined(XFree86Server)
2026 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2027 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2029 b
->backxrb
->ximage
, 0, 0,
2030 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2032 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2037 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2038 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2040 b
->backxrb
->ximage
, 0, 0,
2041 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
);
2042 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2045 else if (b
->backxrb
->pixmap
) {
2046 /* Copy pixmap (back buf) to window (front buf) on server */
2047 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2048 XMesaCopyArea( b
->xm_visual
->display
,
2049 b
->backxrb
->pixmap
, /* source drawable */
2050 b
->frontxrb
->drawable
, /* dest. drawable */
2052 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2053 0, 0 /* dest region */
2055 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2059 _mesa_copy_soft_alpha_renderbuffers(ctx
, &b
->mesa_buffer
);
2061 #if !defined(XFree86Server)
2062 XSync( b
->xm_visual
->display
, False
);
2069 * Copy sub-region of back buffer to front buffer
2071 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
2073 GET_CURRENT_CONTEXT(ctx
);
2075 /* If we're swapping the buffer associated with the current context
2076 * we have to flush any pending rendering commands first.
2078 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2079 _mesa_notifySwapBuffers(ctx
);
2082 /* single buffered */
2087 int yTop
= b
->mesa_buffer
.Height
- y
- height
;
2089 if (FXswapBuffers(b
))
2092 if (b
->backxrb
->ximage
) {
2093 /* Copy Ximage from host's memory to server's window */
2094 #if defined(USE_XSHM) && !defined(XFree86Server)
2096 /* XXX assuming width and height aren't too large! */
2097 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2099 b
->backxrb
->ximage
, x
, yTop
,
2100 x
, yTop
, width
, height
, False
);
2101 /* wait for finished event??? */
2106 /* XXX assuming width and height aren't too large! */
2107 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2109 b
->backxrb
->ximage
, x
, yTop
,
2110 x
, yTop
, width
, height
);
2114 /* Copy pixmap to window on server */
2115 XMesaCopyArea( b
->xm_visual
->display
,
2116 b
->backxrb
->pixmap
, /* source drawable */
2117 b
->frontxrb
->drawable
, /* dest. drawable */
2119 x
, yTop
, width
, height
, /* source region */
2120 x
, yTop
/* dest region */
2128 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2129 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2130 * back buffer directly.
2131 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2132 * ximage - pointer to back buffer's XImage, or NULL
2133 * Return: GL_TRUE = context is double buffered
2134 * GL_FALSE = context is single buffered
2136 #ifndef XFree86Server
2137 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
2138 XMesaPixmap
*pixmap
,
2139 XMesaImage
**ximage
)
2143 *pixmap
= b
->backxrb
->pixmap
;
2145 *ximage
= b
->backxrb
->ximage
;
2154 #endif /* XFree86Server */
2158 * Return the depth buffer associated with an XMesaBuffer.
2159 * Input: b - the XMesa buffer handle
2160 * Output: width, height - size of buffer in pixels
2161 * bytesPerValue - bytes per depth value (2 or 4)
2162 * buffer - pointer to depth buffer values
2163 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2165 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
2166 GLint
*bytesPerValue
, void **buffer
)
2168 struct gl_renderbuffer
*rb
2169 = b
->mesa_buffer
.Attachment
[BUFFER_DEPTH
].Renderbuffer
;
2170 if (!rb
|| !rb
->Data
) {
2178 *width
= b
->mesa_buffer
.Width
;
2179 *height
= b
->mesa_buffer
.Height
;
2180 *bytesPerValue
= b
->mesa_buffer
.Visual
.depthBits
<= 16
2181 ? sizeof(GLushort
) : sizeof(GLuint
);
2188 void XMesaFlush( XMesaContext c
)
2190 if (c
&& c
->xm_visual
) {
2191 #ifdef XFree86Server
2194 XSync( c
->xm_visual
->display
, False
);
2201 const char *XMesaGetString( XMesaContext c
, int name
)
2204 if (name
==XMESA_VERSION
) {
2207 else if (name
==XMESA_EXTENSIONS
) {
2217 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2220 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2221 if (b
->frontxrb
->drawable
== d
&& b
->display
== dpy
) {
2230 * Free/destroy all XMesaBuffers associated with given display.
2232 void xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
)
2234 XMesaBuffer b
, next
;
2235 for (b
= XMesaBufferList
; b
; b
= next
) {
2237 if (b
->display
== dpy
) {
2238 xmesa_free_buffer(b
);
2245 * Look for XMesaBuffers whose X window has been destroyed.
2246 * Deallocate any such XMesaBuffers.
2248 void XMesaGarbageCollect( void )
2250 XMesaBuffer b
, next
;
2251 for (b
=XMesaBufferList
; b
; b
=next
) {
2253 if (b
->display
&& b
->frontxrb
->drawable
&& b
->type
== WINDOW
) {
2254 #ifdef XFree86Server
2257 XSync(b
->display
, False
);
2258 if (!window_exists( b
->display
, b
->frontxrb
->drawable
)) {
2259 /* found a dead window, free the ancillary info */
2260 XMesaDestroyBuffer( b
);
2268 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2269 GLfloat red
, GLfloat green
,
2270 GLfloat blue
, GLfloat alpha
)
2272 GLcontext
*ctx
= &xmesa
->mesa
;
2273 GLint r
= (GLint
) (red
* 255.0F
);
2274 GLint g
= (GLint
) (green
* 255.0F
);
2275 GLint b
= (GLint
) (blue
* 255.0F
);
2276 GLint a
= (GLint
) (alpha
* 255.0F
);
2278 switch (xmesa
->pixelformat
) {
2284 PACK_TRUECOLOR( p
, r
, g
, b
);
2288 return PACK_8A8B8G8R( r
, g
, b
, a
);
2290 return PACK_8A8R8G8B( r
, g
, b
, a
);
2292 return PACK_8R8G8B( r
, g
, b
);
2294 return PACK_5R6G5B( r
, g
, b
);
2298 return DITHER( x
, y
, r
, g
, b
);
2301 /* 382 = (3*255)/2 */
2302 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2304 return DITHER_HPCR(x
, y
, r
, g
, b
);
2308 return LOOKUP( r
, g
, b
);
2311 return GRAY_RGB( r
, g
, b
);
2312 case PF_Dither_5R6G5B
:
2314 case PF_Dither_True
:
2317 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2321 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");
2328 * This is typically called when the window size changes and we need
2329 * to reallocate the buffer's back/depth/stencil/accum buffers.
2332 XMesaResizeBuffers( XMesaBuffer b
)
2334 GET_CURRENT_CONTEXT(ctx
);
2335 XMesaContext xmctx
= XMESA_CONTEXT(ctx
);
2338 xmesa_check_and_update_buffer_size(xmctx
, b
);
2343 xbuffer_to_renderbuffer(int buffer
)
2345 assert(MAX_AUX_BUFFERS
<= 4);
2348 case GLX_FRONT_LEFT_EXT
:
2349 return BUFFER_FRONT_LEFT
;
2350 case GLX_FRONT_RIGHT_EXT
:
2351 return BUFFER_FRONT_RIGHT
;
2352 case GLX_BACK_LEFT_EXT
:
2353 return BUFFER_BACK_LEFT
;
2354 case GLX_BACK_RIGHT_EXT
:
2355 return BUFFER_BACK_RIGHT
;
2368 /* BadValue error */
2375 XMesaBindTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
,
2376 const int *attrib_list
)
2379 GET_CURRENT_CONTEXT(ctx
);
2380 const GLuint unit
= ctx
->Texture
.CurrentUnit
;
2381 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
2382 struct gl_texture_object
*texObj
;
2384 struct gl_renderbuffer
*rb
;
2385 struct xmesa_renderbuffer
*xrb
;
2387 XMesaImage
*img
= NULL
;
2388 GLboolean freeImg
= GL_FALSE
;
2390 b
= xbuffer_to_renderbuffer(buffer
);
2394 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_NONE_EXT
)
2395 return; /* BadMatch error */
2397 rb
= drawable
->mesa_buffer
.Attachment
[b
].Renderbuffer
;
2399 /* invalid buffer */
2402 xrb
= xmesa_renderbuffer(rb
);
2405 switch (drawable
->TextureTarget
) {
2406 case GLX_TEXTURE_1D_EXT
:
2407 texObj
= texUnit
->CurrentTex
[TEXTURE_1D_INDEX
];
2409 case GLX_TEXTURE_2D_EXT
:
2410 texObj
= texUnit
->CurrentTex
[TEXTURE_2D_INDEX
];
2412 case GLX_TEXTURE_RECTANGLE_EXT
:
2413 texObj
= texUnit
->CurrentTex
[TEXTURE_RECT_INDEX
];
2416 return; /* BadMatch error */
2421 * The following is a quick and simple way to implement
2422 * BindTexImage. The better way is to write some new FetchTexel()
2423 * functions which would extract texels from XImages. We'd still
2424 * need to use GetImage when texturing from a Pixmap (front buffer)
2425 * but texturing from a back buffer (XImage) would avoid an image
2431 img
= XMesaGetImage(dpy
, xrb
->pixmap
, 0, 0, rb
->Width
, rb
->Height
, ~0L,
2435 else if (xrb
->ximage
) {
2439 /* store the XImage as a new texture image */
2441 GLenum format
, type
, intFormat
;
2442 if (img
->bits_per_pixel
== 32) {
2444 type
= GL_UNSIGNED_BYTE
;
2445 intFormat
= GL_RGBA
;
2447 else if (img
->bits_per_pixel
== 24) {
2449 type
= GL_UNSIGNED_BYTE
;
2452 else if (img
->bits_per_pixel
== 16) {
2454 type
= GL_UNSIGNED_SHORT_5_6_5
;
2458 _mesa_problem(NULL
, "Unexpected XImage format in XMesaBindTexImage");
2461 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGBA_EXT
) {
2462 intFormat
= GL_RGBA
;
2464 else if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGB_EXT
) {
2468 _mesa_TexImage2D(GL_TEXTURE_2D
, 0, intFormat
, rb
->Width
, rb
->Height
, 0,
2469 format
, type
, img
->data
);
2472 XMesaDestroyImage(img
);
2480 XMesaReleaseTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
)
2482 const GLint b
= xbuffer_to_renderbuffer(buffer
);