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
* 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 */
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 struct gl_framebuffer.
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 /* Copy colormap stuff from previous XMesaBuffer which uses same
689 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
691 copy_colortable_info(buffer
, prevBuffer
);
694 /* Allocate 256 shades of gray */
696 int colorsfailed
= 0;
697 for (gray
=0;gray
<256;gray
++) {
698 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
699 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
700 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
703 xcol
.red
= (r
<< 8) | r
;
704 xcol
.green
= (g
<< 8) | g
;
705 xcol
.blue
= (b
<< 8) | b
;
706 noFaultXAllocColor( client
, v
->display
,
707 cmap
, GET_COLORMAP_SIZE(v
),
708 &xcol
, &exact
, &alloced
);
713 assert(buffer
->num_alloced
<256);
714 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
715 buffer
->num_alloced
++;
720 buffer->color_table[gray*3+0] = xcol.pixel;
721 buffer->color_table[gray*3+1] = xcol.pixel;
722 buffer->color_table[gray*3+2] = xcol.pixel;
723 assert(xcol.pixel < 65536);
724 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
725 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
726 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
728 buffer
->color_table
[gray
] = xcol
.pixel
;
729 assert(xcol
.pixel
< 65536);
730 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
731 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
732 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
735 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
737 "Note: %d out of 256 needed colors do not match exactly.\n",
743 v
->dithered_pf
= PF_Grayscale
;
744 v
->undithered_pf
= PF_Grayscale
;
751 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
752 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
753 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
754 * color. While this function was originally designed just for 8-bit
755 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
756 * Dithering code contributed by Bob Mercier.
759 setup_dithered_color(int client
, XMesaVisual v
,
760 XMesaBuffer buffer
, XMesaColormap cmap
)
762 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
767 XMesaBuffer prevBuffer
;
773 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
775 /* Copy colormap stuff from previous, matching XMesaBuffer.
776 * Do this to avoid time spent in noFaultXAllocColor.
778 copy_colortable_info(buffer
, prevBuffer
);
781 /* Allocate X colors and initialize color_table[], red_table[], etc */
783 int colorsfailed
= 0;
784 for (r
= 0; r
< DITH_R
; r
++) {
785 for (g
= 0; g
< DITH_G
; g
++) {
786 for (b
= 0; b
< DITH_B
; b
++) {
789 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(DITH_R
-1),65535);
790 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(DITH_G
-1),65535);
791 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(DITH_B
-1),65535);
792 noFaultXAllocColor( client
, v
->display
,
793 cmap
, GET_COLORMAP_SIZE(v
),
794 &xcol
, &exact
, &alloced
);
799 assert(buffer
->num_alloced
<256);
800 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
801 buffer
->num_alloced
++;
803 i
= DITH_MIX( r
, g
, b
);
805 buffer
->color_table
[i
] = xcol
.pixel
;
806 assert(xcol
.pixel
< 65536);
807 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (DITH_R
-1);
808 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (DITH_G
-1);
809 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (DITH_B
-1);
814 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
816 "Note: %d out of %d needed colors do not match exactly.\n",
817 colorsfailed
, DITH_R
* DITH_G
* DITH_B
);
822 v
->dithered_pf
= PF_Dither
;
823 v
->undithered_pf
= PF_Lookup
;
829 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
830 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
831 * Special dithering tables have to be initialized.
834 setup_8bit_hpcr(XMesaVisual v
)
836 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
837 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
838 * on the root window AND the colormap obtainable by XGetRGBColormaps
839 * for that atom must be set on the window. (see also tkInitWindow)
840 * If that colormap is not set, the output will look stripy.
843 /* Setup color tables with gamma correction */
847 g
= 1.0 / v
->RedGamma
;
848 for (i
=0; i
<256; i
++) {
849 GLint red
= IROUND_POS(255.0 * pow( hpcr_rgbTbl
[0][i
]/255.0, g
));
850 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
853 g
= 1.0 / v
->GreenGamma
;
854 for (i
=0; i
<256; i
++) {
855 GLint green
= IROUND_POS(255.0 * pow( hpcr_rgbTbl
[1][i
]/255.0, g
));
856 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
859 g
= 1.0 / v
->BlueGamma
;
860 for (i
=0; i
<256; i
++) {
861 GLint blue
= IROUND_POS(255.0 * pow( hpcr_rgbTbl
[2][i
]/255.0, g
));
862 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
864 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
865 v
->dithered_pf
= PF_HPCR
;
867 /* which method should I use to clear */
868 /* GL_FALSE: keep the ordinary method */
869 /* GL_TRUE : clear with dither pattern */
870 v
->hpcr_clear_flag
= _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
872 if (v
->hpcr_clear_flag
) {
873 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
874 DefaultRootWindow(v
->display
),
876 #ifndef XFree86Server
877 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
878 0, 0, 16, 2, AllPlanes
, ZPixmap
);
885 * Setup RGB rendering for a window with a True/DirectColor visual.
888 setup_truecolor(XMesaVisual v
, XMesaBuffer buffer
, XMesaColormap cmap
)
890 unsigned long rmask
, gmask
, bmask
;
894 /* Compute red multiplier (mask) and bit shift */
896 rmask
= GET_REDMASK(v
);
897 while ((rmask
& 1)==0) {
902 /* Compute green multiplier (mask) and bit shift */
904 gmask
= GET_GREENMASK(v
);
905 while ((gmask
& 1)==0) {
910 /* Compute blue multiplier (mask) and bit shift */
912 bmask
= GET_BLUEMASK(v
);
913 while ((bmask
& 1)==0) {
919 * Compute component-to-pixel lookup tables and dithering kernel
922 static GLubyte kernel
[16] = {
923 0*16, 8*16, 2*16, 10*16,
924 12*16, 4*16, 14*16, 6*16,
925 3*16, 11*16, 1*16, 9*16,
926 15*16, 7*16, 13*16, 5*16,
928 GLint rBits
= _mesa_bitcount(rmask
);
929 GLint gBits
= _mesa_bitcount(gmask
);
930 GLint bBits
= _mesa_bitcount(bmask
);
934 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
935 for (i
=0; i
<=rmask
; i
++)
936 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
937 for (i
=0; i
<=gmask
; i
++)
938 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
939 for (i
=0; i
<=bmask
; i
++)
940 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
942 /* convert RGB values from [0,255] to pixel components */
944 for (i
=0;i
<256;i
++) {
945 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
946 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
947 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
948 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
949 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
950 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
952 /* overflow protection */
953 for (i
=256;i
<512;i
++) {
954 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
955 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
956 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
959 /* setup dithering kernel */
961 if (gBits
> maxBits
) maxBits
= gBits
;
962 if (bBits
> maxBits
) maxBits
= bBits
;
964 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
967 v
->undithered_pf
= PF_Truecolor
;
968 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_Dither_True
: PF_Truecolor
;
972 * Now check for TrueColor visuals which we can optimize.
974 if ( GET_REDMASK(v
) ==0x0000ff
975 && GET_GREENMASK(v
)==0x00ff00
976 && GET_BLUEMASK(v
) ==0xff0000
977 && CHECK_BYTE_ORDER(v
)
978 && v
->BitsPerPixel
==32
979 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
980 /* common 32 bpp config used on SGI, Sun */
981 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
; /* ABGR */
983 else if (GET_REDMASK(v
) == 0xff0000
984 && GET_GREENMASK(v
)== 0x00ff00
985 && GET_BLUEMASK(v
) == 0x0000ff
986 && CHECK_BYTE_ORDER(v
)
987 && v
->RedGamma
== 1.0 && v
->GreenGamma
== 1.0 && v
->BlueGamma
== 1.0){
988 if (v
->BitsPerPixel
==32) {
989 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
990 if (GET_VISUAL_DEPTH(v
) == 32 && v
->mesa_visual
.alphaBits
== 8)
991 v
->undithered_pf
= v
->dithered_pf
= PF_8A8R8G8B
; /* ARGB */
993 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
; /* xRGB */
995 else if (v
->BitsPerPixel
== 24) {
996 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
; /* RGB */
999 else if (GET_REDMASK(v
) ==0xf800
1000 && GET_GREENMASK(v
)==0x07e0
1001 && GET_BLUEMASK(v
) ==0x001f
1002 && CHECK_BYTE_ORDER(v
)
1003 && v
->BitsPerPixel
==16
1004 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1006 v
->undithered_pf
= PF_5R6G5B
;
1007 v
->dithered_pf
= PF_Dither_5R6G5B
;
1009 else if (GET_REDMASK(v
) ==0xe0
1010 && GET_GREENMASK(v
)==0x1c
1011 && GET_BLUEMASK(v
) ==0x03
1012 && CHECK_FOR_HPCR(v
)) {
1013 /* 8-bit HP color recovery */
1014 setup_8bit_hpcr( v
);
1021 * Setup RGB rendering for a window with a monochrome visual.
1024 setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
1027 v
->dithered_pf
= v
->undithered_pf
= PF_1Bit
;
1028 /* if black=1 then we must flip pixel values */
1029 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
1035 * When a context is bound for the first time, we can finally finish
1036 * initializing the context's visual and buffer information.
1037 * \param v the XMesaVisual to initialize
1038 * \param b the XMesaBuffer to initialize (may be NULL)
1039 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1040 * \param window the window/pixmap we're rendering into
1041 * \param cmap the colormap associated with the window/pixmap
1042 * \return GL_TRUE=success, GL_FALSE=failure
1045 initialize_visual_and_buffer(XMesaVisual v
, XMesaBuffer b
,
1046 XMesaDrawable window
,
1050 const int xclass
= v
->mesa_visual
.visualType
;
1052 #ifdef XFree86Server
1053 client
= (window
) ? CLIENT_ID(window
->id
) : 0;
1056 ASSERT(!b
|| b
->xm_visual
== v
);
1058 /* Save true bits/pixel */
1059 v
->BitsPerPixel
= bits_per_pixel(v
);
1060 assert(v
->BitsPerPixel
> 0);
1063 * We support RGB rendering into almost any kind of visual.
1065 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1066 setup_truecolor( v
, b
, cmap
);
1068 else if (xclass
== GLX_STATIC_GRAY
&& GET_VISUAL_DEPTH(v
) == 1) {
1069 setup_monochrome( v
, b
);
1071 else if (xclass
== GLX_GRAY_SCALE
|| xclass
== GLX_STATIC_GRAY
) {
1072 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1076 else if ((xclass
== GLX_PSEUDO_COLOR
|| xclass
== GLX_STATIC_COLOR
)
1077 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1078 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1083 _mesa_warning(NULL
, "XMesa: RGB mode rendering not supported in given visual.\n");
1086 v
->mesa_visual
.indexBits
= 0;
1088 if (_mesa_getenv("MESA_NO_DITHER")) {
1089 v
->dithered_pf
= v
->undithered_pf
;
1094 * If MESA_INFO env var is set print out some debugging info
1095 * which can help Brian figure out what's going on when a user
1098 if (_mesa_getenv("MESA_INFO")) {
1099 printf("X/Mesa visual = %p\n", (void *) v
);
1100 printf("X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1101 printf("X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1102 printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
1103 printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1104 printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1110 /* Do window-specific initializations */
1112 /* these should have been set in create_xmesa_buffer */
1113 ASSERT(b
->frontxrb
->drawable
== window
);
1114 ASSERT(b
->frontxrb
->pixmap
== (XMesaPixmap
) window
);
1116 /* Setup for single/double buffering */
1117 if (v
->mesa_visual
.doubleBufferMode
) {
1118 /* Double buffered */
1119 b
->shm
= check_for_xshm( v
->display
);
1122 /* X11 graphics contexts */
1123 #ifdef XFree86Server
1124 b
->gc
= CreateScratchGC(v
->display
, window
->depth
);
1126 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1128 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1130 /* cleargc - for glClear() */
1131 #ifdef XFree86Server
1132 b
->cleargc
= CreateScratchGC(v
->display
, window
->depth
);
1134 b
->cleargc
= XCreateGC( v
->display
, window
, 0, NULL
);
1136 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1139 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1140 * Patch contributed by Michael Pichler May 15, 1995.
1142 #ifdef XFree86Server
1143 b
->swapgc
= CreateScratchGC(v
->display
, window
->depth
);
1147 dixChangeGC(NullClient
, b
->swapgc
, GCGraphicsExposures
, v
, NULL
);
1152 gcvalues
.graphics_exposures
= False
;
1153 b
->swapgc
= XCreateGC(v
->display
, window
,
1154 GCGraphicsExposures
, &gcvalues
);
1157 XMesaSetFunction( v
->display
, b
->swapgc
, GXcopy
);
1159 * Set fill style and tile pixmap once for all for HPCR stuff
1160 * (instead of doing it each time in clear_color_HPCR_pixmap())
1161 * Initialize whole stuff
1162 * Patch contributed by Jacques Leroy March 8, 1998.
1164 if (v
->hpcr_clear_flag
&& b
->backxrb
&& b
->backxrb
->pixmap
) {
1166 for (i
= 0; i
< 16; i
++) {
1167 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1168 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1170 XMesaPutImage(b
->display
, (XMesaDrawable
) v
->hpcr_clear_pixmap
,
1171 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1172 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1173 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1176 /* Initialize the row buffer XImage for use in write_color_span() */
1177 data
= (char*) MALLOC(MAX_WIDTH
*4);
1178 #ifdef XFree86Server
1179 b
->rowimage
= XMesaCreateImage(GET_VISUAL_DEPTH(v
), MAX_WIDTH
, 1, data
);
1181 b
->rowimage
= XCreateImage( v
->display
,
1184 ZPixmap
, 0, /*format, offset*/
1186 MAX_WIDTH
, 1, /*width, height*/
1188 0 /*bytes_per_line*/ );
1200 * Convert an RGBA color to a pixel value.
1203 xmesa_color_to_pixel(struct gl_context
*ctx
,
1204 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1207 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1208 switch (pixelFormat
) {
1214 PACK_TRUECOLOR( p
, r
, g
, b
);
1218 return PACK_8A8B8G8R( r
, g
, b
, a
);
1220 return PACK_8A8R8G8B( r
, g
, b
, a
);
1224 return PACK_8R8G8B( r
, g
, b
);
1226 return PACK_5R6G5B( r
, g
, b
);
1230 return DITHER( 1, 0, r
, g
, b
);
1233 /* 382 = (3*255)/2 */
1234 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1236 return DITHER_HPCR(1, 1, r
, g
, b
);
1240 return LOOKUP( r
, g
, b
);
1243 return GRAY_RGB( r
, g
, b
);
1244 case PF_Dither_True
:
1246 case PF_Dither_5R6G5B
:
1249 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1253 _mesa_problem(ctx
, "Bad pixel format in xmesa_color_to_pixel");
1259 #define NUM_VISUAL_TYPES 6
1262 * Convert an X visual type to a GLX visual type.
1264 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1266 * \return If \c visualType is a valid X visual type, a GLX visual type will
1267 * be returned. Otherwise \c GLX_NONE will be returned.
1270 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1274 xmesa_convert_from_x_visual_type( int visualType
)
1276 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
1277 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
1278 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
1279 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
1282 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
1283 ? glx_visual_types
[ visualType
] : GLX_NONE
;
1287 /**********************************************************************/
1288 /***** Public Functions *****/
1289 /**********************************************************************/
1293 * Create a new X/Mesa visual.
1294 * Input: display - X11 display
1295 * visinfo - an XVisualInfo pointer
1296 * rgb_flag - GL_TRUE = RGB mode,
1297 * GL_FALSE = color index mode
1298 * alpha_flag - alpha buffer requested?
1299 * db_flag - GL_TRUE = double-buffered,
1300 * GL_FALSE = single buffered
1301 * stereo_flag - stereo visual?
1302 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1303 * GL_FALSE = use an off-screen pixmap for back buffer
1304 * depth_size - requested bits/depth values, or zero
1305 * stencil_size - requested bits/stencil values, or zero
1306 * accum_red_size - requested bits/red accum values, or zero
1307 * accum_green_size - requested bits/green accum values, or zero
1308 * accum_blue_size - requested bits/blue accum values, or zero
1309 * accum_alpha_size - requested bits/alpha accum values, or zero
1310 * num_samples - number of samples/pixel if multisampling, or zero
1311 * level - visual level, usually 0
1312 * visualCaveat - ala the GLX extension, usually GLX_NONE
1313 * Return; a new XMesaVisual or 0 if error.
1316 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1317 XMesaVisualInfo visinfo
,
1319 GLboolean alpha_flag
,
1321 GLboolean stereo_flag
,
1322 GLboolean ximage_flag
,
1325 GLint accum_red_size
,
1326 GLint accum_green_size
,
1327 GLint accum_blue_size
,
1328 GLint accum_alpha_size
,
1331 GLint visualCaveat
)
1335 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1337 #ifndef XFree86Server
1338 /* For debugging only */
1339 if (_mesa_getenv("MESA_XSYNC")) {
1340 /* This makes debugging X easier.
1341 * In your debugger, set a breakpoint on _XError to stop when an
1342 * X protocol error is generated.
1344 XSynchronize( display
, 1 );
1348 /* Color-index rendering not supported. */
1352 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1357 v
->display
= display
;
1359 /* Save a copy of the XVisualInfo struct because the user may Xfree()
1360 * the struct but we may need some of the information contained in it
1363 #ifndef XFree86Server
1364 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1369 memcpy(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1372 /* check for MESA_GAMMA environment variable */
1373 gamma
= _mesa_getenv("MESA_GAMMA");
1375 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1376 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1377 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1378 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1379 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1382 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1385 v
->ximage_flag
= ximage_flag
;
1387 #ifdef XFree86Server
1388 /* We could calculate these values by ourselves. nplanes is either the sum
1389 * of the red, green, and blue bits or the number index bits.
1390 * ColormapEntries is either (1U << index_bits) or
1391 * (1U << max(redBits, greenBits, blueBits)).
1393 assert(visinfo
->nplanes
> 0);
1394 v
->nplanes
= visinfo
->nplanes
;
1395 v
->ColormapEntries
= visinfo
->ColormapEntries
;
1397 v
->mesa_visual
.redMask
= visinfo
->redMask
;
1398 v
->mesa_visual
.greenMask
= visinfo
->greenMask
;
1399 v
->mesa_visual
.blueMask
= visinfo
->blueMask
;
1400 v
->visualID
= visinfo
->vid
;
1401 v
->screen
= 0; /* FIXME: What should be done here? */
1403 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
1404 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
1405 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
1406 v
->visualID
= visinfo
->visualid
;
1407 v
->screen
= visinfo
->screen
;
1410 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1411 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
1413 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
1416 v
->mesa_visual
.visualRating
= visualCaveat
;
1419 v
->mesa_visual
.alphaBits
= 8;
1421 (void) initialize_visual_and_buffer( v
, NULL
, 0, 0 );
1424 const int xclass
= v
->mesa_visual
.visualType
;
1425 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1426 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
1427 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
1428 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
1431 /* this is an approximation */
1433 depth
= GET_VISUAL_DEPTH(v
);
1434 red_bits
= depth
/ 3;
1436 green_bits
= depth
/ 2;
1437 depth
-= green_bits
;
1440 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1442 alpha_bits
= v
->mesa_visual
.alphaBits
;
1445 _mesa_initialize_visual( &v
->mesa_visual
,
1446 db_flag
, stereo_flag
,
1447 red_bits
, green_bits
,
1448 blue_bits
, alpha_bits
,
1451 accum_red_size
, accum_green_size
,
1452 accum_blue_size
, accum_alpha_size
,
1455 /* XXX minor hack */
1456 v
->mesa_visual
.level
= level
;
1462 void XMesaDestroyVisual( XMesaVisual v
)
1464 #ifndef XFree86Server
1473 * Create a new XMesaContext.
1474 * \param v the XMesaVisual
1475 * \param share_list another XMesaContext with which to share display
1476 * lists or NULL if no sharing is wanted.
1477 * \return an XMesaContext or NULL if error.
1480 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1482 static GLboolean firstTime
= GL_TRUE
;
1484 struct gl_context
*mesaCtx
;
1485 struct dd_function_table functions
;
1489 _glthread_INIT_MUTEX(_xmesa_lock
);
1490 firstTime
= GL_FALSE
;
1493 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
1494 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1498 mesaCtx
= &(c
->mesa
);
1500 /* initialize with default driver functions, then plug in XMesa funcs */
1501 _mesa_init_driver_functions(&functions
);
1502 xmesa_init_driver_functions(v
, &functions
);
1503 if (!_mesa_initialize_context(mesaCtx
, &v
->mesa_visual
,
1504 share_list
? &(share_list
->mesa
) : (struct gl_context
*) NULL
,
1505 &functions
, (void *) c
)) {
1510 /* Enable this to exercise fixed function -> shader translation
1511 * with software rendering.
1514 mesaCtx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1515 mesaCtx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1518 _mesa_enable_sw_extensions(mesaCtx
);
1519 _mesa_enable_1_3_extensions(mesaCtx
);
1520 _mesa_enable_1_4_extensions(mesaCtx
);
1521 _mesa_enable_1_5_extensions(mesaCtx
);
1522 _mesa_enable_2_0_extensions(mesaCtx
);
1523 _mesa_enable_2_1_extensions(mesaCtx
);
1524 #if ENABLE_EXT_texure_compression_s3tc
1525 if (mesaCtx
->Mesa_DXTn
) {
1526 _mesa_enable_extension(mesaCtx
, "GL_EXT_texture_compression_s3tc");
1527 _mesa_enable_extension(mesaCtx
, "GL_S3_s3tc");
1529 _mesa_enable_extension(mesaCtx
, "GL_3DFX_texture_compression_FXT1");
1531 #if ENABLE_EXT_timer_query
1532 _mesa_enable_extension(mesaCtx
, "GL_EXT_timer_query");
1535 #ifdef XFree86Server
1536 /* If we're running in the X server, do bounds checking to prevent
1537 * segfaults and server crashes!
1539 mesaCtx
->Const
.CheckArrayBounds
= GL_TRUE
;
1542 /* finish up xmesa context initializations */
1543 c
->swapbytes
= CHECK_BYTE_ORDER(v
) ? GL_FALSE
: GL_TRUE
;
1545 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1546 c
->display
= v
->display
;
1547 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1549 /* Initialize the software rasterizer and helper modules.
1551 if (!_swrast_CreateContext( mesaCtx
) ||
1552 !_vbo_CreateContext( mesaCtx
) ||
1553 !_tnl_CreateContext( mesaCtx
) ||
1554 !_swsetup_CreateContext( mesaCtx
)) {
1555 _mesa_free_context_data(&c
->mesa
);
1561 tnl
= TNL_CONTEXT(mesaCtx
);
1562 tnl
->Driver
.RunPipeline
= _tnl_run_pipeline
;
1564 xmesa_register_swrast_functions( mesaCtx
);
1565 _swsetup_Wakeup(mesaCtx
);
1567 _mesa_meta_init(mesaCtx
);
1575 void XMesaDestroyContext( XMesaContext c
)
1577 struct gl_context
*mesaCtx
= &c
->mesa
;
1580 FXdestroyContext( XMESA_BUFFER(mesaCtx
->DrawBuffer
) );
1583 _mesa_meta_free( mesaCtx
);
1585 _swsetup_DestroyContext( mesaCtx
);
1586 _swrast_DestroyContext( mesaCtx
);
1587 _tnl_DestroyContext( mesaCtx
);
1588 _vbo_DestroyContext( mesaCtx
);
1589 _mesa_free_context_data( mesaCtx
);
1596 * Private function for creating an XMesaBuffer which corresponds to an
1597 * X window or pixmap.
1598 * \param v the window's XMesaVisual
1599 * \param w the window we're wrapping
1600 * \return new XMesaBuffer or NULL if error
1603 XMesaCreateWindowBuffer(XMesaVisual v
, XMesaWindow w
)
1605 #ifndef XFree86Server
1606 XWindowAttributes attr
;
1615 /* Check that window depth matches visual depth */
1616 #ifdef XFree86Server
1617 depth
= ((XMesaDrawable
)w
)->depth
;
1619 XGetWindowAttributes( v
->display
, w
, &attr
);
1622 if (GET_VISUAL_DEPTH(v
) != depth
) {
1623 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1624 GET_VISUAL_DEPTH(v
), depth
);
1629 #ifdef XFree86Server
1630 cmap
= (ColormapPtr
)LookupIDByType(wColormap(w
), RT_COLORMAP
);
1632 if (attr
.colormap
) {
1633 cmap
= attr
.colormap
;
1636 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
1637 /* this is weird, a window w/out a colormap!? */
1638 /* OK, let's just allocate a new one and hope for the best */
1639 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1643 b
= create_xmesa_buffer((XMesaDrawable
) w
, WINDOW
, v
, cmap
);
1647 if (!initialize_visual_and_buffer( v
, b
, (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
, (XMesaDrawable
) p
, cmap
)) {
1678 xmesa_free_buffer(b
);
1687 * For GLX_EXT_texture_from_pixmap
1690 XMesaCreatePixmapTextureBuffer(XMesaVisual v
, XMesaPixmap p
,
1692 int format
, int target
, int mipmap
)
1694 GET_CURRENT_CONTEXT(ctx
);
1696 GLuint width
, height
;
1700 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1704 /* get pixmap size, update framebuffer/renderbuffer dims */
1705 xmesa_get_window_size(v
->display
, b
, &width
, &height
);
1706 _mesa_resize_framebuffer(NULL
, &(b
->mesa_buffer
), width
, height
);
1710 if (ctx
->Extensions
.ARB_texture_non_power_of_two
) {
1711 target
= GLX_TEXTURE_2D_EXT
;
1713 else if ( _mesa_bitcount(width
) == 1
1714 && _mesa_bitcount(height
) == 1) {
1715 /* power of two size */
1717 target
= GLX_TEXTURE_1D_EXT
;
1720 target
= GLX_TEXTURE_2D_EXT
;
1723 else if (ctx
->Extensions
.NV_texture_rectangle
) {
1724 target
= GLX_TEXTURE_RECTANGLE_EXT
;
1727 /* non power of two textures not supported */
1728 XMesaDestroyBuffer(b
);
1733 b
->TextureTarget
= target
;
1734 b
->TextureFormat
= format
;
1735 b
->TextureMipmap
= mipmap
;
1737 if (!initialize_visual_and_buffer(v
, b
, (XMesaDrawable
) p
, cmap
)) {
1738 xmesa_free_buffer(b
);
1748 XMesaCreatePBuffer(XMesaVisual v
, XMesaColormap cmap
,
1749 unsigned int width
, unsigned int height
)
1751 #ifndef XFree86Server
1753 XMesaDrawable drawable
; /* X Pixmap Drawable */
1756 /* allocate pixmap for front buffer */
1757 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1758 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1763 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1767 if (!initialize_visual_and_buffer(v
, b
, drawable
, cmap
)) {
1768 xmesa_free_buffer(b
);
1781 * Deallocate an XMesaBuffer structure and all related info.
1784 XMesaDestroyBuffer(XMesaBuffer b
)
1786 xmesa_free_buffer(b
);
1791 * Query the current window size and update the corresponding struct gl_framebuffer
1792 * and all attached renderbuffers.
1794 * 1. the first time a buffer is bound to a context.
1795 * 2. from glViewport to poll for window size changes
1796 * 3. from the XMesaResizeBuffers() API function.
1797 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1798 * when resizing a buffer when no rendering context is bound.
1801 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
)
1803 GLuint width
, height
;
1804 xmesa_get_window_size(drawBuffer
->display
, drawBuffer
, &width
, &height
);
1805 if (drawBuffer
->mesa_buffer
.Width
!= width
||
1806 drawBuffer
->mesa_buffer
.Height
!= height
) {
1807 struct gl_context
*ctx
= xmctx
? &xmctx
->mesa
: NULL
;
1808 _mesa_resize_framebuffer(ctx
, &(drawBuffer
->mesa_buffer
), width
, height
);
1810 drawBuffer
->mesa_buffer
.Initialized
= GL_TRUE
; /* XXX TEMPORARY? */
1815 * Bind buffer b to context c and make c the current rendering context.
1817 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
1819 return XMesaMakeCurrent2( c
, b
, b
);
1824 * Bind buffer b to context c and make c the current rendering context.
1827 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1828 XMesaBuffer readBuffer
)
1831 if (!drawBuffer
|| !readBuffer
)
1832 return GL_FALSE
; /* must specify buffers! */
1834 if (&(c
->mesa
) == _mesa_get_current_context()
1835 && c
->mesa
.DrawBuffer
== &drawBuffer
->mesa_buffer
1836 && c
->mesa
.ReadBuffer
== &readBuffer
->mesa_buffer
1837 && XMESA_BUFFER(c
->mesa
.DrawBuffer
)->wasCurrent
) {
1838 /* same context and buffer, do nothing */
1842 c
->xm_buffer
= drawBuffer
;
1845 if (FXmakeCurrent( drawBuffer
))
1849 /* Call this periodically to detect when the user has begun using
1850 * GL rendering from multiple threads.
1852 _glapi_check_multithread();
1854 xmesa_check_and_update_buffer_size(c
, drawBuffer
);
1855 if (readBuffer
!= drawBuffer
)
1856 xmesa_check_and_update_buffer_size(c
, readBuffer
);
1858 _mesa_make_current(&(c
->mesa
),
1859 &drawBuffer
->mesa_buffer
,
1860 &readBuffer
->mesa_buffer
);
1863 * Must recompute and set these pixel values because colormap
1864 * can be different for different windows.
1866 c
->clearpixel
= xmesa_color_to_pixel( &c
->mesa
,
1871 c
->xm_visual
->undithered_pf
);
1872 XMesaSetForeground(c
->display
, drawBuffer
->cleargc
, c
->clearpixel
);
1874 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1875 drawBuffer
->wasCurrent
= GL_TRUE
;
1879 _mesa_make_current( NULL
, NULL
, NULL
);
1886 * Unbind the context c from its buffer.
1888 GLboolean
XMesaUnbindContext( XMesaContext c
)
1890 /* A no-op for XFree86 integration purposes */
1895 XMesaContext
XMesaGetCurrentContext( void )
1897 GET_CURRENT_CONTEXT(ctx
);
1899 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1908 XMesaBuffer
XMesaGetCurrentBuffer( void )
1910 GET_CURRENT_CONTEXT(ctx
);
1912 XMesaBuffer xmbuf
= XMESA_BUFFER(ctx
->DrawBuffer
);
1921 /* New in Mesa 3.1 */
1922 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
1924 GET_CURRENT_CONTEXT(ctx
);
1926 return XMESA_BUFFER(ctx
->ReadBuffer
);
1934 #ifdef XFree86Server
1936 GLboolean
XMesaForceCurrent(XMesaContext c
)
1939 _glapi_set_dispatch(c
->mesa
.CurrentDispatch
);
1941 if (&(c
->mesa
) != _mesa_get_current_context()) {
1942 _mesa_make_current(&c
->mesa
, c
->mesa
.DrawBuffer
, c
->mesa
.ReadBuffer
);
1946 _mesa_make_current(NULL
, NULL
, NULL
);
1953 GLboolean
XMesaLoseCurrent(XMesaContext c
)
1956 _mesa_make_current(NULL
, NULL
, NULL
);
1962 GLboolean
XMesaCopyContext( XMesaContext xm_src
, XMesaContext xm_dst
, GLuint mask
)
1964 _mesa_copy_context(&xm_src
->mesa
, &xm_dst
->mesa
, mask
);
1967 #endif /* XFree86Server */
1971 GLboolean
XMesaSetFXmode( GLint mode
)
1981 * Copy the back buffer to the front buffer. If there's no back buffer
1985 void XMesaSwapBuffers( XMesaBuffer b
)
1987 GET_CURRENT_CONTEXT(ctx
);
1990 /* single buffered */
1994 /* If we're swapping the buffer associated with the current context
1995 * we have to flush any pending rendering commands first.
1997 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
1998 _mesa_notifySwapBuffers(ctx
);
2002 if (FXswapBuffers(b
))
2005 if (b
->backxrb
->ximage
) {
2006 /* Copy Ximage (back buf) from client memory to server window */
2007 #if defined(USE_XSHM) && !defined(XFree86Server)
2009 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2010 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2012 b
->backxrb
->ximage
, 0, 0,
2013 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2015 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2020 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2021 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2023 b
->backxrb
->ximage
, 0, 0,
2024 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
);
2025 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2028 else if (b
->backxrb
->pixmap
) {
2029 /* Copy pixmap (back buf) to window (front buf) on server */
2030 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2031 XMesaCopyArea( b
->xm_visual
->display
,
2032 b
->backxrb
->pixmap
, /* source drawable */
2033 b
->frontxrb
->drawable
, /* dest. drawable */
2035 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2036 0, 0 /* dest region */
2038 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2042 _mesa_copy_soft_alpha_renderbuffers(ctx
, &b
->mesa_buffer
);
2044 #if !defined(XFree86Server)
2045 XSync( b
->xm_visual
->display
, False
);
2052 * Copy sub-region of back buffer to front buffer
2054 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
2056 GET_CURRENT_CONTEXT(ctx
);
2058 /* If we're swapping the buffer associated with the current context
2059 * we have to flush any pending rendering commands first.
2061 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2062 _mesa_notifySwapBuffers(ctx
);
2065 /* single buffered */
2070 int yTop
= b
->mesa_buffer
.Height
- y
- height
;
2072 if (FXswapBuffers(b
))
2075 if (b
->backxrb
->ximage
) {
2076 /* Copy Ximage from host's memory to server's window */
2077 #if defined(USE_XSHM) && !defined(XFree86Server)
2079 /* XXX assuming width and height aren't too large! */
2080 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2082 b
->backxrb
->ximage
, x
, yTop
,
2083 x
, yTop
, width
, height
, False
);
2084 /* wait for finished event??? */
2089 /* XXX assuming width and height aren't too large! */
2090 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2092 b
->backxrb
->ximage
, x
, yTop
,
2093 x
, yTop
, width
, height
);
2097 /* Copy pixmap to window on server */
2098 XMesaCopyArea( b
->xm_visual
->display
,
2099 b
->backxrb
->pixmap
, /* source drawable */
2100 b
->frontxrb
->drawable
, /* dest. drawable */
2102 x
, yTop
, width
, height
, /* source region */
2103 x
, yTop
/* dest region */
2111 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2112 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2113 * back buffer directly.
2114 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2115 * ximage - pointer to back buffer's XImage, or NULL
2116 * Return: GL_TRUE = context is double buffered
2117 * GL_FALSE = context is single buffered
2119 #ifndef XFree86Server
2120 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
2121 XMesaPixmap
*pixmap
,
2122 XMesaImage
**ximage
)
2126 *pixmap
= b
->backxrb
->pixmap
;
2128 *ximage
= b
->backxrb
->ximage
;
2137 #endif /* XFree86Server */
2141 * Return the depth buffer associated with an XMesaBuffer.
2142 * Input: b - the XMesa buffer handle
2143 * Output: width, height - size of buffer in pixels
2144 * bytesPerValue - bytes per depth value (2 or 4)
2145 * buffer - pointer to depth buffer values
2146 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2148 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
2149 GLint
*bytesPerValue
, void **buffer
)
2151 struct gl_renderbuffer
*rb
2152 = b
->mesa_buffer
.Attachment
[BUFFER_DEPTH
].Renderbuffer
;
2153 if (!rb
|| !rb
->Data
) {
2161 *width
= b
->mesa_buffer
.Width
;
2162 *height
= b
->mesa_buffer
.Height
;
2163 *bytesPerValue
= b
->mesa_buffer
.Visual
.depthBits
<= 16
2164 ? sizeof(GLushort
) : sizeof(GLuint
);
2171 void XMesaFlush( XMesaContext c
)
2173 if (c
&& c
->xm_visual
) {
2174 #ifdef XFree86Server
2177 XSync( c
->xm_visual
->display
, False
);
2184 const char *XMesaGetString( XMesaContext c
, int name
)
2187 if (name
==XMESA_VERSION
) {
2190 else if (name
==XMESA_EXTENSIONS
) {
2200 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2203 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2204 if (b
->frontxrb
->drawable
== d
&& b
->display
== dpy
) {
2213 * Free/destroy all XMesaBuffers associated with given display.
2215 void xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
)
2217 XMesaBuffer b
, next
;
2218 for (b
= XMesaBufferList
; b
; b
= next
) {
2220 if (b
->display
== dpy
) {
2221 xmesa_free_buffer(b
);
2228 * Look for XMesaBuffers whose X window has been destroyed.
2229 * Deallocate any such XMesaBuffers.
2231 void XMesaGarbageCollect( void )
2233 XMesaBuffer b
, next
;
2234 for (b
=XMesaBufferList
; b
; b
=next
) {
2236 if (b
->display
&& b
->frontxrb
->drawable
&& b
->type
== WINDOW
) {
2237 #ifdef XFree86Server
2240 XSync(b
->display
, False
);
2241 if (!window_exists( b
->display
, b
->frontxrb
->drawable
)) {
2242 /* found a dead window, free the ancillary info */
2243 XMesaDestroyBuffer( b
);
2251 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2252 GLfloat red
, GLfloat green
,
2253 GLfloat blue
, GLfloat alpha
)
2255 struct gl_context
*ctx
= &xmesa
->mesa
;
2256 GLint r
= (GLint
) (red
* 255.0F
);
2257 GLint g
= (GLint
) (green
* 255.0F
);
2258 GLint b
= (GLint
) (blue
* 255.0F
);
2259 GLint a
= (GLint
) (alpha
* 255.0F
);
2261 switch (xmesa
->pixelformat
) {
2267 PACK_TRUECOLOR( p
, r
, g
, b
);
2271 return PACK_8A8B8G8R( r
, g
, b
, a
);
2273 return PACK_8A8R8G8B( r
, g
, b
, a
);
2275 return PACK_8R8G8B( r
, g
, b
);
2277 return PACK_5R6G5B( r
, g
, b
);
2281 return DITHER( x
, y
, r
, g
, b
);
2284 /* 382 = (3*255)/2 */
2285 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2287 return DITHER_HPCR(x
, y
, r
, g
, b
);
2291 return LOOKUP( r
, g
, b
);
2294 return GRAY_RGB( r
, g
, b
);
2295 case PF_Dither_5R6G5B
:
2297 case PF_Dither_True
:
2300 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2304 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");
2311 * This is typically called when the window size changes and we need
2312 * to reallocate the buffer's back/depth/stencil/accum buffers.
2315 XMesaResizeBuffers( XMesaBuffer b
)
2317 GET_CURRENT_CONTEXT(ctx
);
2318 XMesaContext xmctx
= XMESA_CONTEXT(ctx
);
2321 xmesa_check_and_update_buffer_size(xmctx
, b
);
2326 xbuffer_to_renderbuffer(int buffer
)
2328 assert(MAX_AUX_BUFFERS
<= 4);
2331 case GLX_FRONT_LEFT_EXT
:
2332 return BUFFER_FRONT_LEFT
;
2333 case GLX_FRONT_RIGHT_EXT
:
2334 return BUFFER_FRONT_RIGHT
;
2335 case GLX_BACK_LEFT_EXT
:
2336 return BUFFER_BACK_LEFT
;
2337 case GLX_BACK_RIGHT_EXT
:
2338 return BUFFER_BACK_RIGHT
;
2351 /* BadValue error */
2358 XMesaBindTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
,
2359 const int *attrib_list
)
2362 GET_CURRENT_CONTEXT(ctx
);
2363 const GLuint unit
= ctx
->Texture
.CurrentUnit
;
2364 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
2365 struct gl_texture_object
*texObj
;
2367 struct gl_renderbuffer
*rb
;
2368 struct xmesa_renderbuffer
*xrb
;
2370 XMesaImage
*img
= NULL
;
2371 GLboolean freeImg
= GL_FALSE
;
2373 b
= xbuffer_to_renderbuffer(buffer
);
2377 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_NONE_EXT
)
2378 return; /* BadMatch error */
2380 rb
= drawable
->mesa_buffer
.Attachment
[b
].Renderbuffer
;
2382 /* invalid buffer */
2385 xrb
= xmesa_renderbuffer(rb
);
2388 switch (drawable
->TextureTarget
) {
2389 case GLX_TEXTURE_1D_EXT
:
2390 texObj
= texUnit
->CurrentTex
[TEXTURE_1D_INDEX
];
2392 case GLX_TEXTURE_2D_EXT
:
2393 texObj
= texUnit
->CurrentTex
[TEXTURE_2D_INDEX
];
2395 case GLX_TEXTURE_RECTANGLE_EXT
:
2396 texObj
= texUnit
->CurrentTex
[TEXTURE_RECT_INDEX
];
2399 return; /* BadMatch error */
2404 * The following is a quick and simple way to implement
2405 * BindTexImage. The better way is to write some new FetchTexel()
2406 * functions which would extract texels from XImages. We'd still
2407 * need to use GetImage when texturing from a Pixmap (front buffer)
2408 * but texturing from a back buffer (XImage) would avoid an image
2414 img
= XMesaGetImage(dpy
, xrb
->pixmap
, 0, 0, rb
->Width
, rb
->Height
, ~0L,
2418 else if (xrb
->ximage
) {
2422 /* store the XImage as a new texture image */
2424 GLenum format
, type
, intFormat
;
2425 if (img
->bits_per_pixel
== 32) {
2427 type
= GL_UNSIGNED_BYTE
;
2428 intFormat
= GL_RGBA
;
2430 else if (img
->bits_per_pixel
== 24) {
2432 type
= GL_UNSIGNED_BYTE
;
2435 else if (img
->bits_per_pixel
== 16) {
2437 type
= GL_UNSIGNED_SHORT_5_6_5
;
2441 _mesa_problem(NULL
, "Unexpected XImage format in XMesaBindTexImage");
2444 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGBA_EXT
) {
2445 intFormat
= GL_RGBA
;
2447 else if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGB_EXT
) {
2451 _mesa_TexImage2D(GL_TEXTURE_2D
, 0, intFormat
, rb
->Width
, rb
->Height
, 0,
2452 format
, type
, img
->data
);
2455 XMesaDestroyImage(img
);
2463 XMesaReleaseTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
)
2465 const GLint b
= xbuffer_to_renderbuffer(buffer
);