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"
84 * Global X driver lock
86 _glthread_Mutex _xmesa_lock
;
91 * Lookup tables for HPCR pixel format:
93 static short hpcr_rgbTbl
[3][256] = {
95 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
96 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
97 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
98 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
99 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
100 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
101 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
102 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
103 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
104 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
105 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
106 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
107 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
108 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
109 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
110 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
113 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
114 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
115 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
116 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
117 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
118 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
119 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
120 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
121 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
122 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
123 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
124 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
125 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
126 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
127 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
128 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
131 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
132 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
133 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
134 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
135 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
136 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
137 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
138 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
139 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
140 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
141 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
142 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
143 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
144 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
145 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
146 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
152 /**********************************************************************/
153 /***** X Utility Functions *****/
154 /**********************************************************************/
158 * Return the host's byte order as LSBFirst or MSBFirst ala X.
160 #ifndef XFree86Server
161 static int host_byte_order( void )
164 char *cptr
= (char *) &i
;
165 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
171 * Check if the X Shared Memory extension is available.
172 * Return: 0 = not available
173 * 1 = shared XImage support available
174 * 2 = shared Pixmap support available also
176 static int check_for_xshm( XMesaDisplay
*display
)
178 #if defined(USE_XSHM) && !defined(XFree86Server)
179 int major
, minor
, ignore
;
182 if (XQueryExtension( display
, "MIT-SHM", &ignore
, &ignore
, &ignore
)) {
183 if (XShmQueryVersion( display
, &major
, &minor
, &pixmaps
)==True
) {
184 return (pixmaps
==True
) ? 2 : 1;
194 /* No XSHM support */
201 * Apply gamma correction to an intensity value in [0..max]. Return the
202 * new intensity value.
205 gamma_adjust( GLfloat gamma
, GLint value
, GLint max
)
211 double x
= (double) value
/ (double) max
;
212 return IROUND_POS((GLfloat
) max
* _mesa_pow(x
, 1.0F
/gamma
));
219 * Return the true number of bits per pixel for XImages.
220 * For example, if we request a 24-bit deep visual we may actually need/get
221 * 32bpp XImages. This function returns the appropriate bpp.
222 * Input: dpy - the X display
223 * visinfo - desribes the visual to be used for XImages
224 * Return: true number of bits per pixel for XImages
227 bits_per_pixel( XMesaVisual xmv
)
230 const int depth
= xmv
->nplanes
;
233 for (i
= 0; i
< screenInfo
.numPixmapFormats
; i
++) {
234 if (screenInfo
.formats
[i
].depth
== depth
)
235 return screenInfo
.formats
[i
].bitsPerPixel
;
237 return depth
; /* should never get here, but this should be safe */
239 XMesaDisplay
*dpy
= xmv
->display
;
240 XMesaVisualInfo visinfo
= xmv
->visinfo
;
243 /* Create a temporary XImage */
244 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
245 ZPixmap
, 0, /*format, offset*/
246 (char*) MALLOC(8), /*data*/
247 1, 1, /*width, height*/
252 /* grab the bits/pixel value */
253 bitsPerPixel
= img
->bits_per_pixel
;
254 /* free the XImage */
255 _mesa_free( img
->data
);
257 XMesaDestroyImage( img
);
265 * Determine if a given X window ID is valid (window exists).
266 * Do this by calling XGetWindowAttributes() for the window and
267 * checking if we catch an X error.
268 * Input: dpy - the display
269 * win - the window to check for existance
270 * Return: GL_TRUE - window exists
271 * GL_FALSE - window doesn't exist
273 #ifndef XFree86Server
274 static GLboolean WindowExistsFlag
;
276 static int window_exists_err_handler( XMesaDisplay
* dpy
, XErrorEvent
* xerr
)
279 if (xerr
->error_code
== BadWindow
) {
280 WindowExistsFlag
= GL_FALSE
;
285 static GLboolean
window_exists( XMesaDisplay
*dpy
, Window win
)
287 XWindowAttributes wa
;
288 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
289 WindowExistsFlag
= GL_TRUE
;
290 old_handler
= XSetErrorHandler(window_exists_err_handler
);
291 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
292 XSetErrorHandler(old_handler
);
293 return WindowExistsFlag
;
297 get_drawable_size( XMesaDisplay
*dpy
, Drawable d
, GLuint
*width
, GLuint
*height
)
302 unsigned int w
, h
, bw
, depth
;
303 stat
= XGetGeometry(dpy
, d
, &root
, &xpos
, &ypos
, &w
, &h
, &bw
, &depth
);
312 * Return the size of the window (or pixmap) that corresponds to the
314 * \param width returns width in pixels
315 * \param height returns height in pixels
318 xmesa_get_window_size(XMesaDisplay
*dpy
, XMesaBuffer b
,
319 GLuint
*width
, GLuint
*height
)
322 *width
= MIN2(b
->frontxrb
->drawable
->width
, MAX_WIDTH
);
323 *height
= MIN2(b
->frontxrb
->drawable
->height
, MAX_HEIGHT
);
327 _glthread_LOCK_MUTEX(_xmesa_lock
);
328 XSync(b
->xm_visual
->display
, 0); /* added for Chromium */
329 stat
= get_drawable_size(dpy
, b
->frontxrb
->pixmap
, width
, height
);
330 _glthread_UNLOCK_MUTEX(_xmesa_lock
);
333 /* probably querying a window that's recently been destroyed */
334 _mesa_warning(NULL
, "XGetGeometry failed!\n");
335 *width
= *height
= 1;
342 /**********************************************************************/
343 /***** Linked list of XMesaBuffers *****/
344 /**********************************************************************/
346 XMesaBuffer XMesaBufferList
= NULL
;
350 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
351 * Note that XMesaBuffer is derived from GLframebuffer.
352 * The new XMesaBuffer will not have any size (Width=Height=0).
354 * \param d the corresponding X drawable (window or pixmap)
355 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
356 * \param vis the buffer's visual
357 * \param cmap the window's colormap, if known.
358 * \return new XMesaBuffer or NULL if any problem
361 create_xmesa_buffer(XMesaDrawable d
, BufferType type
,
362 XMesaVisual vis
, XMesaColormap cmap
)
366 ASSERT(type
== WINDOW
|| type
== PIXMAP
|| type
== PBUFFER
);
368 b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
372 b
->display
= vis
->display
;
377 _mesa_initialize_framebuffer(&b
->mesa_buffer
, &vis
->mesa_visual
);
378 b
->mesa_buffer
.Delete
= xmesa_delete_framebuffer
;
383 b
->frontxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_FALSE
);
388 b
->frontxrb
->Parent
= b
;
389 b
->frontxrb
->drawable
= d
;
390 b
->frontxrb
->pixmap
= (XMesaPixmap
) d
;
391 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_FRONT_LEFT
,
397 if (vis
->mesa_visual
.doubleBufferMode
) {
398 b
->backxrb
= xmesa_new_renderbuffer(NULL
, 0, &vis
->mesa_visual
, GL_TRUE
);
400 /* XXX free front xrb too */
404 b
->backxrb
->Parent
= b
;
405 /* determine back buffer implementation */
406 b
->db_mode
= vis
->ximage_flag
? BACK_XIMAGE
: BACK_PIXMAP
;
408 _mesa_add_renderbuffer(&b
->mesa_buffer
, BUFFER_BACK_LEFT
,
413 * Software alpha planes
415 if (vis
->mesa_visual
.alphaBits
> 0
416 && vis
->undithered_pf
!= PF_8A8B8G8R
417 && vis
->undithered_pf
!= PF_8A8R8G8B
) {
418 /* Visual has alpha, but pixel format doesn't support it.
419 * We'll use an alpha renderbuffer wrapper.
421 b
->swAlpha
= GL_TRUE
;
424 b
->swAlpha
= GL_FALSE
;
428 * Other renderbuffer (depth, stencil, etc)
430 _mesa_add_soft_renderbuffers(&b
->mesa_buffer
,
431 GL_FALSE
, /* color */
432 vis
->mesa_visual
.haveDepthBuffer
,
433 vis
->mesa_visual
.haveStencilBuffer
,
434 vis
->mesa_visual
.haveAccumBuffer
,
436 vis
->mesa_visual
.numAuxBuffers
> 0 );
438 /* GLX_EXT_texture_from_pixmap */
439 b
->TextureTarget
= 0;
440 b
->TextureFormat
= GLX_TEXTURE_FORMAT_NONE_EXT
;
441 b
->TextureMipmap
= 0;
443 /* insert buffer into linked list */
444 b
->Next
= XMesaBufferList
;
452 * Find an XMesaBuffer by matching X display and colormap but NOT matching
453 * the notThis buffer.
456 xmesa_find_buffer(XMesaDisplay
*dpy
, XMesaColormap cmap
, XMesaBuffer notThis
)
459 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
460 if (b
->display
==dpy
&& b
->cmap
==cmap
&& b
!=notThis
) {
469 * Remove buffer from linked list, delete if no longer referenced.
472 xmesa_free_buffer(XMesaBuffer buffer
)
474 XMesaBuffer prev
= NULL
, b
;
476 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
478 struct gl_framebuffer
*fb
= &buffer
->mesa_buffer
;
480 /* unlink buffer from list */
482 prev
->Next
= buffer
->Next
;
484 XMesaBufferList
= buffer
->Next
;
486 /* mark as delete pending */
487 fb
->DeletePending
= GL_TRUE
;
489 /* Since the X window for the XMesaBuffer is going away, we don't
490 * want to dereference this pointer in the future.
492 b
->frontxrb
->drawable
= 0;
494 /* Unreference. If count = zero we'll really delete the buffer */
495 _mesa_reference_framebuffer(&fb
, NULL
);
499 /* continue search */
502 /* buffer not found in XMesaBufferList */
503 _mesa_problem(NULL
,"xmesa_free_buffer() - buffer not found\n");
508 * Copy X color table stuff from one XMesaBuffer to another.
511 copy_colortable_info(XMesaBuffer dst
, const XMesaBuffer src
)
513 MEMCPY(dst
->color_table
, src
->color_table
, sizeof(src
->color_table
));
514 MEMCPY(dst
->pixel_to_r
, src
->pixel_to_r
, sizeof(src
->pixel_to_r
));
515 MEMCPY(dst
->pixel_to_g
, src
->pixel_to_g
, sizeof(src
->pixel_to_g
));
516 MEMCPY(dst
->pixel_to_b
, src
->pixel_to_b
, sizeof(src
->pixel_to_b
));
517 dst
->num_alloced
= src
->num_alloced
;
518 MEMCPY(dst
->alloced_colors
, src
->alloced_colors
,
519 sizeof(src
->alloced_colors
));
524 /**********************************************************************/
525 /***** Misc Private Functions *****/
526 /**********************************************************************/
530 * A replacement for XAllocColor. This function should never
531 * fail to allocate a color. When XAllocColor fails, we return
532 * the nearest matching color. If we have to allocate many colors
533 * this function isn't too efficient; the XQueryColors() could be
535 * Written by Michael Pichler, Brian Paul, Mark Kilgard
536 * Input: dpy - X display
538 * cmapSize - size of colormap
539 * In/Out: color - the XColor struct
540 * Output: exact - 1=exact color match, 0=closest match
541 * alloced - 1=XAlloc worked, 0=XAlloc failed
544 noFaultXAllocColor( int client
,
549 int *exact
, int *alloced
)
555 /* we'll try to cache ctable for better remote display performance */
556 static Display
*prevDisplay
= NULL
;
557 static XMesaColormap prevCmap
= 0;
558 static int prevCmapSize
= 0;
559 static XMesaColor
*ctable
= NULL
;
563 double mindist
; /* 3*2^16^2 exceeds long int precision. */
567 /* First try just using XAllocColor. */
570 &color
->red
, &color
->green
, &color
->blue
,
574 if (XAllocColor(dpy
, cmap
, color
))
582 /* Alloc failed, search for closest match */
584 /* Retrieve color table entries. */
585 /* XXX alloca candidate. */
587 ppixIn
= (Pixel
*) MALLOC(cmapSize
* sizeof(Pixel
));
588 ctable
= (xrgb
*) MALLOC(cmapSize
* sizeof(xrgb
));
589 for (i
= 0; i
< cmapSize
; i
++) {
592 QueryColors(cmap
, cmapSize
, ppixIn
, ctable
);
594 if (prevDisplay
!= dpy
|| prevCmap
!= cmap
595 || prevCmapSize
!= cmapSize
|| !ctable
) {
596 /* free previously cached color table */
599 /* Get the color table from X */
600 ctable
= (XMesaColor
*) MALLOC(cmapSize
* sizeof(XMesaColor
));
602 for (i
= 0; i
< cmapSize
; i
++) {
605 XQueryColors(dpy
, cmap
, ctable
, cmapSize
);
608 prevCmapSize
= cmapSize
;
612 /* Find best match. */
615 for (i
= 0; i
< cmapSize
; i
++) {
616 double dr
= 0.30 * ((double) color
->red
- (double) ctable
[i
].red
);
617 double dg
= 0.59 * ((double) color
->green
- (double) ctable
[i
].green
);
618 double db
= 0.11 * ((double) color
->blue
- (double) ctable
[i
].blue
);
619 double dist
= dr
* dr
+ dg
* dg
+ db
* db
;
620 if (bestmatch
< 0 || dist
< mindist
) {
627 subColor
.red
= ctable
[bestmatch
].red
;
628 subColor
.green
= ctable
[bestmatch
].green
;
629 subColor
.blue
= ctable
[bestmatch
].blue
;
630 /* Try to allocate the closest match color. This should only
631 * fail if the cell is read/write. Otherwise, we're incrementing
632 * the cell's reference count.
636 &subColor
.red
, &subColor
.green
, &subColor
.blue
,
638 client
) == Success
) {
640 if (XAllocColor(dpy
, cmap
, &subColor
)) {
645 /* do this to work around a problem reported by Frank Ortega */
646 subColor
.pixel
= (unsigned long) bestmatch
;
647 subColor
.red
= ctable
[bestmatch
].red
;
648 subColor
.green
= ctable
[bestmatch
].green
;
649 subColor
.blue
= ctable
[bestmatch
].blue
;
650 subColor
.flags
= DoRed
| DoGreen
| DoBlue
;
657 /* don't free table, save it for next time */
667 * Do setup for PF_GRAYSCALE pixel format.
668 * Note that buffer may be NULL.
671 setup_grayscale(int client
, XMesaVisual v
,
672 XMesaBuffer buffer
, XMesaColormap cmap
)
674 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
679 XMesaBuffer prevBuffer
;
685 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
687 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
688 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
689 /* Copy colormap stuff from previous XMesaBuffer which uses same
690 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
692 copy_colortable_info(buffer
, prevBuffer
);
695 /* Allocate 256 shades of gray */
697 int colorsfailed
= 0;
698 for (gray
=0;gray
<256;gray
++) {
699 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
700 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
701 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
704 xcol
.red
= (r
<< 8) | r
;
705 xcol
.green
= (g
<< 8) | g
;
706 xcol
.blue
= (b
<< 8) | b
;
707 noFaultXAllocColor( client
, v
->display
,
708 cmap
, GET_COLORMAP_SIZE(v
),
709 &xcol
, &exact
, &alloced
);
714 assert(buffer
->num_alloced
<256);
715 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
716 buffer
->num_alloced
++;
721 buffer->color_table[gray*3+0] = xcol.pixel;
722 buffer->color_table[gray*3+1] = xcol.pixel;
723 buffer->color_table[gray*3+2] = xcol.pixel;
724 assert(xcol.pixel < 65536);
725 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
726 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
727 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
729 buffer
->color_table
[gray
] = xcol
.pixel
;
730 assert(xcol
.pixel
< 65536);
731 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
732 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
733 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
736 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
738 "Note: %d out of 256 needed colors do not match exactly.\n",
744 v
->dithered_pf
= PF_Grayscale
;
745 v
->undithered_pf
= PF_Grayscale
;
752 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
753 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
754 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
755 * color. While this function was originally designed just for 8-bit
756 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
757 * Dithering code contributed by Bob Mercier.
760 setup_dithered_color(int client
, XMesaVisual v
,
761 XMesaBuffer buffer
, XMesaColormap cmap
)
763 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
768 XMesaBuffer prevBuffer
;
774 prevBuffer
= xmesa_find_buffer(v
->display
, cmap
, buffer
);
776 (buffer
->xm_visual
->mesa_visual
.rgbMode
==
777 prevBuffer
->xm_visual
->mesa_visual
.rgbMode
)) {
778 /* Copy colormap stuff from previous, matching XMesaBuffer.
779 * Do this to avoid time spent in noFaultXAllocColor.
781 copy_colortable_info(buffer
, prevBuffer
);
784 /* Allocate X colors and initialize color_table[], red_table[], etc */
786 int colorsfailed
= 0;
787 for (r
= 0; r
< DITH_R
; r
++) {
788 for (g
= 0; g
< DITH_G
; g
++) {
789 for (b
= 0; b
< DITH_B
; b
++) {
792 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(DITH_R
-1),65535);
793 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(DITH_G
-1),65535);
794 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(DITH_B
-1),65535);
795 noFaultXAllocColor( client
, v
->display
,
796 cmap
, GET_COLORMAP_SIZE(v
),
797 &xcol
, &exact
, &alloced
);
802 assert(buffer
->num_alloced
<256);
803 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
804 buffer
->num_alloced
++;
806 i
= DITH_MIX( r
, g
, b
);
808 buffer
->color_table
[i
] = xcol
.pixel
;
809 assert(xcol
.pixel
< 65536);
810 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (DITH_R
-1);
811 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (DITH_G
-1);
812 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (DITH_B
-1);
817 if (colorsfailed
&& _mesa_getenv("MESA_DEBUG")) {
819 "Note: %d out of %d needed colors do not match exactly.\n",
820 colorsfailed
, DITH_R
* DITH_G
* DITH_B
);
825 v
->dithered_pf
= PF_Dither
;
826 v
->undithered_pf
= PF_Lookup
;
832 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
833 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
834 * Special dithering tables have to be initialized.
837 setup_8bit_hpcr(XMesaVisual v
)
839 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
840 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
841 * on the root window AND the colormap obtainable by XGetRGBColormaps
842 * for that atom must be set on the window. (see also tkInitWindow)
843 * If that colormap is not set, the output will look stripy.
846 /* Setup color tables with gamma correction */
850 g
= 1.0 / v
->RedGamma
;
851 for (i
=0; i
<256; i
++) {
852 GLint red
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[0][i
]/255.0, g
));
853 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
856 g
= 1.0 / v
->GreenGamma
;
857 for (i
=0; i
<256; i
++) {
858 GLint green
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[1][i
]/255.0, g
));
859 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
862 g
= 1.0 / v
->BlueGamma
;
863 for (i
=0; i
<256; i
++) {
864 GLint blue
= IROUND_POS(255.0 * _mesa_pow( hpcr_rgbTbl
[2][i
]/255.0, g
));
865 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
867 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
868 v
->dithered_pf
= PF_HPCR
;
870 /* which method should I use to clear */
871 /* GL_FALSE: keep the ordinary method */
872 /* GL_TRUE : clear with dither pattern */
873 v
->hpcr_clear_flag
= _mesa_getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
875 if (v
->hpcr_clear_flag
) {
876 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
877 DefaultRootWindow(v
->display
),
879 #ifndef XFree86Server
880 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
881 0, 0, 16, 2, AllPlanes
, ZPixmap
);
888 * Setup RGB rendering for a window with a True/DirectColor visual.
891 setup_truecolor(XMesaVisual v
, XMesaBuffer buffer
, XMesaColormap cmap
)
893 unsigned long rmask
, gmask
, bmask
;
897 /* Compute red multiplier (mask) and bit shift */
899 rmask
= GET_REDMASK(v
);
900 while ((rmask
& 1)==0) {
905 /* Compute green multiplier (mask) and bit shift */
907 gmask
= GET_GREENMASK(v
);
908 while ((gmask
& 1)==0) {
913 /* Compute blue multiplier (mask) and bit shift */
915 bmask
= GET_BLUEMASK(v
);
916 while ((bmask
& 1)==0) {
922 * Compute component-to-pixel lookup tables and dithering kernel
925 static GLubyte kernel
[16] = {
926 0*16, 8*16, 2*16, 10*16,
927 12*16, 4*16, 14*16, 6*16,
928 3*16, 11*16, 1*16, 9*16,
929 15*16, 7*16, 13*16, 5*16,
931 GLint rBits
= _mesa_bitcount(rmask
);
932 GLint gBits
= _mesa_bitcount(gmask
);
933 GLint bBits
= _mesa_bitcount(bmask
);
937 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
938 for (i
=0; i
<=rmask
; i
++)
939 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
940 for (i
=0; i
<=gmask
; i
++)
941 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
942 for (i
=0; i
<=bmask
; i
++)
943 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
945 /* convert RGB values from [0,255] to pixel components */
947 for (i
=0;i
<256;i
++) {
948 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
949 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
950 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
951 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
952 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
953 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
955 /* overflow protection */
956 for (i
=256;i
<512;i
++) {
957 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
958 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
959 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
962 /* setup dithering kernel */
964 if (gBits
> maxBits
) maxBits
= gBits
;
965 if (bBits
> maxBits
) maxBits
= bBits
;
967 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
970 v
->undithered_pf
= PF_Truecolor
;
971 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_Dither_True
: PF_Truecolor
;
975 * Now check for TrueColor visuals which we can optimize.
977 if ( GET_REDMASK(v
) ==0x0000ff
978 && GET_GREENMASK(v
)==0x00ff00
979 && GET_BLUEMASK(v
) ==0xff0000
980 && CHECK_BYTE_ORDER(v
)
981 && v
->BitsPerPixel
==32
982 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
983 /* common 32 bpp config used on SGI, Sun */
984 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
; /* ABGR */
986 else if (GET_REDMASK(v
) == 0xff0000
987 && GET_GREENMASK(v
)== 0x00ff00
988 && GET_BLUEMASK(v
) == 0x0000ff
989 && CHECK_BYTE_ORDER(v
)
990 && v
->RedGamma
== 1.0 && v
->GreenGamma
== 1.0 && v
->BlueGamma
== 1.0){
991 if (v
->BitsPerPixel
==32) {
992 /* if 32 bpp, and visual indicates 8 bpp alpha channel */
993 if (GET_VISUAL_DEPTH(v
) == 32 && v
->mesa_visual
.alphaBits
== 8)
994 v
->undithered_pf
= v
->dithered_pf
= PF_8A8R8G8B
; /* ARGB */
996 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
; /* xRGB */
998 else if (v
->BitsPerPixel
== 24) {
999 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
; /* RGB */
1002 else if (GET_REDMASK(v
) ==0xf800
1003 && GET_GREENMASK(v
)==0x07e0
1004 && GET_BLUEMASK(v
) ==0x001f
1005 && CHECK_BYTE_ORDER(v
)
1006 && v
->BitsPerPixel
==16
1007 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1009 v
->undithered_pf
= PF_5R6G5B
;
1010 v
->dithered_pf
= PF_Dither_5R6G5B
;
1012 else if (GET_REDMASK(v
) ==0xe0
1013 && GET_GREENMASK(v
)==0x1c
1014 && GET_BLUEMASK(v
) ==0x03
1015 && CHECK_FOR_HPCR(v
)) {
1016 /* 8-bit HP color recovery */
1017 setup_8bit_hpcr( v
);
1024 * Setup RGB rendering for a window with a monochrome visual.
1027 setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
1030 v
->dithered_pf
= v
->undithered_pf
= PF_1Bit
;
1031 /* if black=1 then we must flip pixel values */
1032 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
1038 * When a context is bound for the first time, we can finally finish
1039 * initializing the context's visual and buffer information.
1040 * \param v the XMesaVisual to initialize
1041 * \param b the XMesaBuffer to initialize (may be NULL)
1042 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
1043 * \param window the window/pixmap we're rendering into
1044 * \param cmap the colormap associated with the window/pixmap
1045 * \return GL_TRUE=success, GL_FALSE=failure
1048 initialize_visual_and_buffer(XMesaVisual v
, XMesaBuffer b
,
1049 GLboolean rgb_flag
, XMesaDrawable window
,
1054 #ifdef XFree86Server
1055 client
= (window
) ? CLIENT_ID(window
->id
) : 0;
1058 ASSERT(!b
|| b
->xm_visual
== v
);
1060 /* Save true bits/pixel */
1061 v
->BitsPerPixel
= bits_per_pixel(v
);
1062 assert(v
->BitsPerPixel
> 0);
1064 if (rgb_flag
== GL_FALSE
) {
1065 /* COLOR-INDEXED WINDOW:
1066 * Even if the visual is TrueColor or DirectColor we treat it as
1067 * being color indexed. This is weird but might be useful to someone.
1069 v
->dithered_pf
= v
->undithered_pf
= PF_Index
;
1070 v
->mesa_visual
.indexBits
= GET_VISUAL_DEPTH(v
);
1074 * We support RGB rendering into almost any kind of visual.
1076 const int xclass
= v
->mesa_visual
.visualType
;
1077 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1078 setup_truecolor( v
, b
, cmap
);
1080 else if (xclass
== GLX_STATIC_GRAY
&& GET_VISUAL_DEPTH(v
) == 1) {
1081 setup_monochrome( v
, b
);
1083 else if (xclass
== GLX_GRAY_SCALE
|| xclass
== GLX_STATIC_GRAY
) {
1084 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1088 else if ((xclass
== GLX_PSEUDO_COLOR
|| xclass
== GLX_STATIC_COLOR
)
1089 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1090 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1095 _mesa_warning(NULL
, "XMesa: RGB mode rendering not supported in given visual.\n");
1098 v
->mesa_visual
.indexBits
= 0;
1100 if (_mesa_getenv("MESA_NO_DITHER")) {
1101 v
->dithered_pf
= v
->undithered_pf
;
1107 * If MESA_INFO env var is set print out some debugging info
1108 * which can help Brian figure out what's going on when a user
1111 if (_mesa_getenv("MESA_INFO")) {
1112 _mesa_printf("X/Mesa visual = %p\n", (void *) v
);
1113 _mesa_printf("X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1114 _mesa_printf("X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1115 _mesa_printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
1116 _mesa_printf("X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1117 _mesa_printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1123 /* Do window-specific initializations */
1125 /* these should have been set in create_xmesa_buffer */
1126 ASSERT(b
->frontxrb
->drawable
== window
);
1127 ASSERT(b
->frontxrb
->pixmap
== (XMesaPixmap
) window
);
1129 /* Setup for single/double buffering */
1130 if (v
->mesa_visual
.doubleBufferMode
) {
1131 /* Double buffered */
1132 b
->shm
= check_for_xshm( v
->display
);
1135 /* X11 graphics contexts */
1136 #ifdef XFree86Server
1137 b
->gc
= CreateScratchGC(v
->display
, window
->depth
);
1139 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1141 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1143 /* cleargc - for glClear() */
1144 #ifdef XFree86Server
1145 b
->cleargc
= CreateScratchGC(v
->display
, window
->depth
);
1147 b
->cleargc
= XCreateGC( v
->display
, window
, 0, NULL
);
1149 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1152 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1153 * Patch contributed by Michael Pichler May 15, 1995.
1155 #ifdef XFree86Server
1156 b
->swapgc
= CreateScratchGC(v
->display
, window
->depth
);
1160 dixChangeGC(NullClient
, b
->swapgc
, GCGraphicsExposures
, v
, NULL
);
1165 gcvalues
.graphics_exposures
= False
;
1166 b
->swapgc
= XCreateGC(v
->display
, window
,
1167 GCGraphicsExposures
, &gcvalues
);
1170 XMesaSetFunction( v
->display
, b
->swapgc
, GXcopy
);
1172 * Set fill style and tile pixmap once for all for HPCR stuff
1173 * (instead of doing it each time in clear_color_HPCR_pixmap())
1174 * Initialize whole stuff
1175 * Patch contributed by Jacques Leroy March 8, 1998.
1177 if (v
->hpcr_clear_flag
&& b
->backxrb
&& b
->backxrb
->pixmap
) {
1179 for (i
= 0; i
< 16; i
++) {
1180 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1181 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1183 XMesaPutImage(b
->display
, (XMesaDrawable
) v
->hpcr_clear_pixmap
,
1184 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1185 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1186 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1189 /* Initialize the row buffer XImage for use in write_color_span() */
1190 data
= (char*) MALLOC(MAX_WIDTH
*4);
1191 #ifdef XFree86Server
1192 b
->rowimage
= XMesaCreateImage(GET_VISUAL_DEPTH(v
), MAX_WIDTH
, 1, data
);
1194 b
->rowimage
= XCreateImage( v
->display
,
1197 ZPixmap
, 0, /*format, offset*/
1199 MAX_WIDTH
, 1, /*width, height*/
1201 0 /*bytes_per_line*/ );
1213 * Convert an RGBA color to a pixel value.
1216 xmesa_color_to_pixel(GLcontext
*ctx
,
1217 GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1220 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1221 switch (pixelFormat
) {
1227 PACK_TRUECOLOR( p
, r
, g
, b
);
1231 return PACK_8A8B8G8R( r
, g
, b
, a
);
1233 return PACK_8A8R8G8B( r
, g
, b
, a
);
1237 return PACK_8R8G8B( r
, g
, b
);
1239 return PACK_5R6G5B( r
, g
, b
);
1243 return DITHER( 1, 0, r
, g
, b
);
1246 /* 382 = (3*255)/2 */
1247 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1249 return DITHER_HPCR(1, 1, r
, g
, b
);
1253 return LOOKUP( r
, g
, b
);
1256 return GRAY_RGB( r
, g
, b
);
1257 case PF_Dither_True
:
1259 case PF_Dither_5R6G5B
:
1262 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1266 _mesa_problem(ctx
, "Bad pixel format in xmesa_color_to_pixel");
1272 #define NUM_VISUAL_TYPES 6
1275 * Convert an X visual type to a GLX visual type.
1277 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
1279 * \return If \c visualType is a valid X visual type, a GLX visual type will
1280 * be returned. Otherwise \c GLX_NONE will be returned.
1283 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
1287 xmesa_convert_from_x_visual_type( int visualType
)
1289 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
1290 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
1291 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
1292 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
1295 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
1296 ? glx_visual_types
[ visualType
] : GLX_NONE
;
1300 /**********************************************************************/
1301 /***** Public Functions *****/
1302 /**********************************************************************/
1305 #ifdef IN_DRI_DRIVER
1306 #define need_GL_VERSION_1_3
1307 #define need_GL_VERSION_1_4
1308 #define need_GL_VERSION_1_5
1309 #define need_GL_VERSION_2_0
1311 /* sw extensions for imaging */
1312 #define need_GL_EXT_blend_color
1313 #define need_GL_EXT_blend_minmax
1314 #define need_GL_EXT_convolution
1315 #define need_GL_EXT_histogram
1316 #define need_GL_SGI_color_table
1318 /* sw extensions not associated with some GL version */
1319 #define need_GL_ARB_shader_objects
1320 #define need_GL_ARB_vertex_program
1321 #define need_GL_APPLE_vertex_array_object
1322 #define need_GL_ATI_fragment_shader
1323 #define need_GL_EXT_depth_bounds_test
1324 #define need_GL_EXT_framebuffer_object
1325 #define need_GL_EXT_framebuffer_blit
1326 #define need_GL_EXT_gpu_program_parameters
1327 #define need_GL_EXT_paletted_texture
1328 #define need_GL_MESA_resize_buffers
1329 #define need_GL_NV_vertex_program
1330 #define need_GL_NV_fragment_program
1332 #include "extension_helper.h"
1335 const struct dri_extension card_extensions
[] =
1337 { "GL_VERSION_1_3", GL_VERSION_1_3_functions
},
1338 { "GL_VERSION_1_4", GL_VERSION_1_4_functions
},
1339 { "GL_VERSION_1_5", GL_VERSION_1_5_functions
},
1340 { "GL_VERSION_2_0", GL_VERSION_2_0_functions
},
1342 { "GL_EXT_blend_color", GL_EXT_blend_color_functions
},
1343 { "GL_EXT_blend_minmax", GL_EXT_blend_minmax_functions
},
1344 { "GL_EXT_convolution", GL_EXT_convolution_functions
},
1345 { "GL_EXT_histogram", GL_EXT_histogram_functions
},
1346 { "GL_SGI_color_table", GL_SGI_color_table_functions
},
1348 { "GL_ARB_shader_objects", GL_ARB_shader_objects_functions
},
1349 { "GL_ARB_vertex_program", GL_ARB_vertex_program_functions
},
1350 { "GL_APPLE_vertex_array_object", GL_APPLE_vertex_array_object_functions
},
1351 { "GL_ATI_fragment_shader", GL_ATI_fragment_shader_functions
},
1352 { "GL_EXT_depth_bounds_test", GL_EXT_depth_bounds_test_functions
},
1353 { "GL_EXT_framebuffer_object", GL_EXT_framebuffer_object_functions
},
1354 { "GL_EXT_framebuffer_blit", GL_EXT_framebuffer_blit_functions
},
1355 { "GL_EXT_gpu_program_parameters", GL_EXT_gpu_program_parameters_functions
},
1356 { "GL_EXT_paletted_texture", GL_EXT_paletted_texture_functions
},
1357 { "GL_MESA_resize_buffers", GL_MESA_resize_buffers_functions
},
1358 { "GL_NV_vertex_program", GL_NV_vertex_program_functions
},
1359 { "GL_NV_fragment_program", GL_NV_fragment_program_functions
},
1365 * Create a new X/Mesa visual.
1366 * Input: display - X11 display
1367 * visinfo - an XVisualInfo pointer
1368 * rgb_flag - GL_TRUE = RGB mode,
1369 * GL_FALSE = color index mode
1370 * alpha_flag - alpha buffer requested?
1371 * db_flag - GL_TRUE = double-buffered,
1372 * GL_FALSE = single buffered
1373 * stereo_flag - stereo visual?
1374 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1375 * GL_FALSE = use an off-screen pixmap for back buffer
1376 * depth_size - requested bits/depth values, or zero
1377 * stencil_size - requested bits/stencil values, or zero
1378 * accum_red_size - requested bits/red accum values, or zero
1379 * accum_green_size - requested bits/green accum values, or zero
1380 * accum_blue_size - requested bits/blue accum values, or zero
1381 * accum_alpha_size - requested bits/alpha accum values, or zero
1382 * num_samples - number of samples/pixel if multisampling, or zero
1383 * level - visual level, usually 0
1384 * visualCaveat - ala the GLX extension, usually GLX_NONE
1385 * Return; a new XMesaVisual or 0 if error.
1388 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1389 XMesaVisualInfo visinfo
,
1391 GLboolean alpha_flag
,
1393 GLboolean stereo_flag
,
1394 GLboolean ximage_flag
,
1397 GLint accum_red_size
,
1398 GLint accum_green_size
,
1399 GLint accum_blue_size
,
1400 GLint accum_alpha_size
,
1403 GLint visualCaveat
)
1407 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1409 #ifdef IN_DRI_DRIVER
1410 /* driInitExtensions() should be called once per screen to setup extension
1411 * indices. There is no need to call it when the context is created since
1412 * XMesa enables mesa sw extensions on its own.
1414 driInitExtensions( NULL
, card_extensions
, GL_FALSE
);
1417 #ifndef XFree86Server
1418 /* For debugging only */
1419 if (_mesa_getenv("MESA_XSYNC")) {
1420 /* This makes debugging X easier.
1421 * In your debugger, set a breakpoint on _XError to stop when an
1422 * X protocol error is generated.
1424 XSynchronize( display
, 1 );
1428 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1433 v
->display
= display
;
1435 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
1436 * the struct but we may need some of the information contained in it
1439 #ifndef XFree86Server
1440 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1445 MEMCPY(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1448 /* check for MESA_GAMMA environment variable */
1449 gamma
= _mesa_getenv("MESA_GAMMA");
1451 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1452 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1453 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1454 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1455 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1458 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1461 v
->ximage_flag
= ximage_flag
;
1463 #ifdef XFree86Server
1464 /* We could calculate these values by ourselves. nplanes is either the sum
1465 * of the red, green, and blue bits or the number index bits.
1466 * ColormapEntries is either (1U << index_bits) or
1467 * (1U << max(redBits, greenBits, blueBits)).
1469 assert(visinfo
->nplanes
> 0);
1470 v
->nplanes
= visinfo
->nplanes
;
1471 v
->ColormapEntries
= visinfo
->ColormapEntries
;
1473 v
->mesa_visual
.redMask
= visinfo
->redMask
;
1474 v
->mesa_visual
.greenMask
= visinfo
->greenMask
;
1475 v
->mesa_visual
.blueMask
= visinfo
->blueMask
;
1476 v
->mesa_visual
.visualID
= visinfo
->vid
;
1477 v
->mesa_visual
.screen
= 0; /* FIXME: What should be done here? */
1479 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
1480 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
1481 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
1482 v
->mesa_visual
.visualID
= visinfo
->visualid
;
1483 v
->mesa_visual
.screen
= visinfo
->screen
;
1486 #if defined(XFree86Server) || !(defined(__cplusplus) || defined(c_plusplus))
1487 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
1489 v
->mesa_visual
.visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
1492 v
->mesa_visual
.visualRating
= visualCaveat
;
1495 v
->mesa_visual
.alphaBits
= 8;
1497 (void) initialize_visual_and_buffer( v
, NULL
, rgb_flag
, 0, 0 );
1500 const int xclass
= v
->mesa_visual
.visualType
;
1501 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
1502 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
1503 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
1504 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
1507 /* this is an approximation */
1509 depth
= GET_VISUAL_DEPTH(v
);
1510 red_bits
= depth
/ 3;
1512 green_bits
= depth
/ 2;
1513 depth
-= green_bits
;
1516 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1518 alpha_bits
= v
->mesa_visual
.alphaBits
;
1521 _mesa_initialize_visual( &v
->mesa_visual
,
1522 rgb_flag
, db_flag
, stereo_flag
,
1523 red_bits
, green_bits
,
1524 blue_bits
, alpha_bits
,
1525 v
->mesa_visual
.indexBits
,
1528 accum_red_size
, accum_green_size
,
1529 accum_blue_size
, accum_alpha_size
,
1532 /* XXX minor hack */
1533 v
->mesa_visual
.level
= level
;
1539 void XMesaDestroyVisual( XMesaVisual v
)
1541 #ifndef XFree86Server
1542 _mesa_free(v
->visinfo
);
1550 * Create a new XMesaContext.
1551 * \param v the XMesaVisual
1552 * \param share_list another XMesaContext with which to share display
1553 * lists or NULL if no sharing is wanted.
1554 * \return an XMesaContext or NULL if error.
1557 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1559 static GLboolean firstTime
= GL_TRUE
;
1562 struct dd_function_table functions
;
1566 _glthread_INIT_MUTEX(_xmesa_lock
);
1567 firstTime
= GL_FALSE
;
1570 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
1571 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1575 mesaCtx
= &(c
->mesa
);
1577 /* initialize with default driver functions, then plug in XMesa funcs */
1578 _mesa_init_driver_functions(&functions
);
1579 xmesa_init_driver_functions(v
, &functions
);
1580 if (!_mesa_initialize_context(mesaCtx
, &v
->mesa_visual
,
1581 share_list
? &(share_list
->mesa
) : (GLcontext
*) NULL
,
1582 &functions
, (void *) c
)) {
1587 /* Enable this to exercise fixed function -> shader translation
1588 * with software rendering.
1591 mesaCtx
->VertexProgram
._MaintainTnlProgram
= GL_TRUE
;
1592 mesaCtx
->FragmentProgram
._MaintainTexEnvProgram
= GL_TRUE
;
1595 _mesa_enable_sw_extensions(mesaCtx
);
1596 _mesa_enable_1_3_extensions(mesaCtx
);
1597 _mesa_enable_1_4_extensions(mesaCtx
);
1598 _mesa_enable_1_5_extensions(mesaCtx
);
1599 _mesa_enable_2_0_extensions(mesaCtx
);
1600 _mesa_enable_2_1_extensions(mesaCtx
);
1601 #if ENABLE_EXT_texure_compression_s3tc
1602 if (mesaCtx
->Mesa_DXTn
) {
1603 _mesa_enable_extension(mesaCtx
, "GL_EXT_texture_compression_s3tc");
1604 _mesa_enable_extension(mesaCtx
, "GL_S3_s3tc");
1606 _mesa_enable_extension(mesaCtx
, "GL_3DFX_texture_compression_FXT1");
1608 #if ENABLE_EXT_timer_query
1609 _mesa_enable_extension(mesaCtx
, "GL_EXT_timer_query");
1612 #ifdef XFree86Server
1613 /* If we're running in the X server, do bounds checking to prevent
1614 * segfaults and server crashes!
1616 mesaCtx
->Const
.CheckArrayBounds
= GL_TRUE
;
1619 /* finish up xmesa context initializations */
1620 c
->swapbytes
= CHECK_BYTE_ORDER(v
) ? GL_FALSE
: GL_TRUE
;
1622 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1623 c
->display
= v
->display
;
1624 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1626 /* Initialize the software rasterizer and helper modules.
1628 if (!_swrast_CreateContext( mesaCtx
) ||
1629 !_vbo_CreateContext( mesaCtx
) ||
1630 !_tnl_CreateContext( mesaCtx
) ||
1631 !_swsetup_CreateContext( mesaCtx
)) {
1632 _mesa_free_context_data(&c
->mesa
);
1638 tnl
= TNL_CONTEXT(mesaCtx
);
1639 tnl
->Driver
.RunPipeline
= _tnl_run_pipeline
;
1641 xmesa_register_swrast_functions( mesaCtx
);
1642 _swsetup_Wakeup(mesaCtx
);
1650 void XMesaDestroyContext( XMesaContext c
)
1652 GLcontext
*mesaCtx
= &c
->mesa
;
1655 FXdestroyContext( XMESA_BUFFER(mesaCtx
->DrawBuffer
) );
1658 _swsetup_DestroyContext( mesaCtx
);
1659 _swrast_DestroyContext( mesaCtx
);
1660 _tnl_DestroyContext( mesaCtx
);
1661 _vbo_DestroyContext( mesaCtx
);
1662 _mesa_free_context_data( mesaCtx
);
1669 * Private function for creating an XMesaBuffer which corresponds to an
1670 * X window or pixmap.
1671 * \param v the window's XMesaVisual
1672 * \param w the window we're wrapping
1673 * \return new XMesaBuffer or NULL if error
1676 XMesaCreateWindowBuffer(XMesaVisual v
, XMesaWindow w
)
1678 #ifndef XFree86Server
1679 XWindowAttributes attr
;
1688 /* Check that window depth matches visual depth */
1689 #ifdef XFree86Server
1690 depth
= ((XMesaDrawable
)w
)->depth
;
1692 XGetWindowAttributes( v
->display
, w
, &attr
);
1695 if (GET_VISUAL_DEPTH(v
) != depth
) {
1696 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
1697 GET_VISUAL_DEPTH(v
), depth
);
1702 #ifdef XFree86Server
1703 cmap
= (ColormapPtr
)LookupIDByType(wColormap(w
), RT_COLORMAP
);
1705 if (attr
.colormap
) {
1706 cmap
= attr
.colormap
;
1709 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
1710 /* this is weird, a window w/out a colormap!? */
1711 /* OK, let's just allocate a new one and hope for the best */
1712 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1716 b
= create_xmesa_buffer((XMesaDrawable
) w
, WINDOW
, v
, cmap
);
1720 if (!initialize_visual_and_buffer( v
, b
, v
->mesa_visual
.rgbMode
,
1721 (XMesaDrawable
) w
, cmap
)) {
1722 xmesa_free_buffer(b
);
1732 * Create a new XMesaBuffer from an X pixmap.
1734 * \param v the XMesaVisual
1735 * \param p the pixmap
1736 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
1737 * \c GLX_DIRECT_COLOR visual for the pixmap
1738 * \returns new XMesaBuffer or NULL if error
1741 XMesaCreatePixmapBuffer(XMesaVisual v
, XMesaPixmap p
, XMesaColormap cmap
)
1747 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1751 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1752 (XMesaDrawable
) p
, cmap
)) {
1753 xmesa_free_buffer(b
);
1762 * For GLX_EXT_texture_from_pixmap
1765 XMesaCreatePixmapTextureBuffer(XMesaVisual v
, XMesaPixmap p
,
1767 int format
, int target
, int mipmap
)
1769 GET_CURRENT_CONTEXT(ctx
);
1771 GLuint width
, height
;
1775 b
= create_xmesa_buffer((XMesaDrawable
) p
, PIXMAP
, v
, cmap
);
1779 /* get pixmap size, update framebuffer/renderbuffer dims */
1780 xmesa_get_window_size(v
->display
, b
, &width
, &height
);
1781 _mesa_resize_framebuffer(NULL
, &(b
->mesa_buffer
), width
, height
);
1785 if (ctx
->Extensions
.ARB_texture_non_power_of_two
) {
1786 target
= GLX_TEXTURE_2D_EXT
;
1788 else if ( _mesa_bitcount(width
) == 1
1789 && _mesa_bitcount(height
) == 1) {
1790 /* power of two size */
1792 target
= GLX_TEXTURE_1D_EXT
;
1795 target
= GLX_TEXTURE_2D_EXT
;
1798 else if (ctx
->Extensions
.NV_texture_rectangle
) {
1799 target
= GLX_TEXTURE_RECTANGLE_EXT
;
1802 /* non power of two textures not supported */
1803 XMesaDestroyBuffer(b
);
1808 b
->TextureTarget
= target
;
1809 b
->TextureFormat
= format
;
1810 b
->TextureMipmap
= mipmap
;
1812 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1813 (XMesaDrawable
) p
, cmap
)) {
1814 xmesa_free_buffer(b
);
1824 XMesaCreatePBuffer(XMesaVisual v
, XMesaColormap cmap
,
1825 unsigned int width
, unsigned int height
)
1827 #ifndef XFree86Server
1829 XMesaDrawable drawable
; /* X Pixmap Drawable */
1832 /* allocate pixmap for front buffer */
1833 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1834 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1839 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1843 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1845 xmesa_free_buffer(b
);
1858 * Deallocate an XMesaBuffer structure and all related info.
1861 XMesaDestroyBuffer(XMesaBuffer b
)
1863 xmesa_free_buffer(b
);
1868 * Query the current window size and update the corresponding GLframebuffer
1869 * and all attached renderbuffers.
1871 * 1. the first time a buffer is bound to a context.
1872 * 2. from glViewport to poll for window size changes
1873 * 3. from the XMesaResizeBuffers() API function.
1874 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1875 * when resizing a buffer when no rendering context is bound.
1878 xmesa_check_and_update_buffer_size(XMesaContext xmctx
, XMesaBuffer drawBuffer
)
1880 GLuint width
, height
;
1881 xmesa_get_window_size(drawBuffer
->display
, drawBuffer
, &width
, &height
);
1882 if (drawBuffer
->mesa_buffer
.Width
!= width
||
1883 drawBuffer
->mesa_buffer
.Height
!= height
) {
1884 GLcontext
*ctx
= xmctx
? &xmctx
->mesa
: NULL
;
1885 _mesa_resize_framebuffer(ctx
, &(drawBuffer
->mesa_buffer
), width
, height
);
1887 drawBuffer
->mesa_buffer
.Initialized
= GL_TRUE
; /* XXX TEMPORARY? */
1892 * Bind buffer b to context c and make c the current rendering context.
1894 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
1896 return XMesaMakeCurrent2( c
, b
, b
);
1901 * Bind buffer b to context c and make c the current rendering context.
1904 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1905 XMesaBuffer readBuffer
)
1908 if (!drawBuffer
|| !readBuffer
)
1909 return GL_FALSE
; /* must specify buffers! */
1911 if (&(c
->mesa
) == _mesa_get_current_context()
1912 && c
->mesa
.DrawBuffer
== &drawBuffer
->mesa_buffer
1913 && c
->mesa
.ReadBuffer
== &readBuffer
->mesa_buffer
1914 && XMESA_BUFFER(c
->mesa
.DrawBuffer
)->wasCurrent
) {
1915 /* same context and buffer, do nothing */
1919 c
->xm_buffer
= drawBuffer
;
1922 if (FXmakeCurrent( drawBuffer
))
1926 /* Call this periodically to detect when the user has begun using
1927 * GL rendering from multiple threads.
1929 _glapi_check_multithread();
1931 xmesa_check_and_update_buffer_size(c
, drawBuffer
);
1932 if (readBuffer
!= drawBuffer
)
1933 xmesa_check_and_update_buffer_size(c
, readBuffer
);
1935 _mesa_make_current(&(c
->mesa
),
1936 &drawBuffer
->mesa_buffer
,
1937 &readBuffer
->mesa_buffer
);
1939 if (c
->xm_visual
->mesa_visual
.rgbMode
) {
1941 * Must recompute and set these pixel values because colormap
1942 * can be different for different windows.
1944 c
->clearpixel
= xmesa_color_to_pixel( &c
->mesa
,
1949 c
->xm_visual
->undithered_pf
);
1950 XMesaSetForeground(c
->display
, drawBuffer
->cleargc
, c
->clearpixel
);
1953 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1954 drawBuffer
->wasCurrent
= GL_TRUE
;
1958 _mesa_make_current( NULL
, NULL
, NULL
);
1965 * Unbind the context c from its buffer.
1967 GLboolean
XMesaUnbindContext( XMesaContext c
)
1969 /* A no-op for XFree86 integration purposes */
1974 XMesaContext
XMesaGetCurrentContext( void )
1976 GET_CURRENT_CONTEXT(ctx
);
1978 XMesaContext xmesa
= XMESA_CONTEXT(ctx
);
1987 XMesaBuffer
XMesaGetCurrentBuffer( void )
1989 GET_CURRENT_CONTEXT(ctx
);
1991 XMesaBuffer xmbuf
= XMESA_BUFFER(ctx
->DrawBuffer
);
2000 /* New in Mesa 3.1 */
2001 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
2003 GET_CURRENT_CONTEXT(ctx
);
2005 return XMESA_BUFFER(ctx
->ReadBuffer
);
2013 #ifdef XFree86Server
2015 GLboolean
XMesaForceCurrent(XMesaContext c
)
2018 _glapi_set_dispatch(c
->mesa
.CurrentDispatch
);
2020 if (&(c
->mesa
) != _mesa_get_current_context()) {
2021 _mesa_make_current(&c
->mesa
, c
->mesa
.DrawBuffer
, c
->mesa
.ReadBuffer
);
2025 _mesa_make_current(NULL
, NULL
, NULL
);
2032 GLboolean
XMesaLoseCurrent(XMesaContext c
)
2035 _mesa_make_current(NULL
, NULL
, NULL
);
2041 GLboolean
XMesaCopyContext( XMesaContext xm_src
, XMesaContext xm_dst
, GLuint mask
)
2043 _mesa_copy_context(&xm_src
->mesa
, &xm_dst
->mesa
, mask
);
2046 #endif /* XFree86Server */
2050 GLboolean
XMesaSetFXmode( GLint mode
)
2060 * Copy the back buffer to the front buffer. If there's no back buffer
2064 void XMesaSwapBuffers( XMesaBuffer b
)
2066 GET_CURRENT_CONTEXT(ctx
);
2069 /* single buffered */
2073 /* If we're swapping the buffer associated with the current context
2074 * we have to flush any pending rendering commands first.
2076 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2077 _mesa_notifySwapBuffers(ctx
);
2081 if (FXswapBuffers(b
))
2084 if (b
->backxrb
->ximage
) {
2085 /* Copy Ximage (back buf) from client memory to server window */
2086 #if defined(USE_XSHM) && !defined(XFree86Server)
2088 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2089 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2091 b
->backxrb
->ximage
, 0, 0,
2092 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2094 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2099 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2100 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2102 b
->backxrb
->ximage
, 0, 0,
2103 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
);
2104 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2107 else if (b
->backxrb
->pixmap
) {
2108 /* Copy pixmap (back buf) to window (front buf) on server */
2109 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2110 XMesaCopyArea( b
->xm_visual
->display
,
2111 b
->backxrb
->pixmap
, /* source drawable */
2112 b
->frontxrb
->drawable
, /* dest. drawable */
2114 0, 0, b
->mesa_buffer
.Width
, b
->mesa_buffer
.Height
,
2115 0, 0 /* dest region */
2117 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2121 _mesa_copy_soft_alpha_renderbuffers(ctx
, &b
->mesa_buffer
);
2123 #if !defined(XFree86Server)
2124 XSync( b
->xm_visual
->display
, False
);
2131 * Copy sub-region of back buffer to front buffer
2133 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
2135 GET_CURRENT_CONTEXT(ctx
);
2137 /* If we're swapping the buffer associated with the current context
2138 * we have to flush any pending rendering commands first.
2140 if (ctx
&& ctx
->DrawBuffer
== &(b
->mesa_buffer
))
2141 _mesa_notifySwapBuffers(ctx
);
2144 /* single buffered */
2149 int yTop
= b
->mesa_buffer
.Height
- y
- height
;
2151 if (FXswapBuffers(b
))
2154 if (b
->backxrb
->ximage
) {
2155 /* Copy Ximage from host's memory to server's window */
2156 #if defined(USE_XSHM) && !defined(XFree86Server)
2158 /* XXX assuming width and height aren't too large! */
2159 XShmPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2161 b
->backxrb
->ximage
, x
, yTop
,
2162 x
, yTop
, width
, height
, False
);
2163 /* wait for finished event??? */
2168 /* XXX assuming width and height aren't too large! */
2169 XMesaPutImage( b
->xm_visual
->display
, b
->frontxrb
->drawable
,
2171 b
->backxrb
->ximage
, x
, yTop
,
2172 x
, yTop
, width
, height
);
2176 /* Copy pixmap to window on server */
2177 XMesaCopyArea( b
->xm_visual
->display
,
2178 b
->backxrb
->pixmap
, /* source drawable */
2179 b
->frontxrb
->drawable
, /* dest. drawable */
2181 x
, yTop
, width
, height
, /* source region */
2182 x
, yTop
/* dest region */
2190 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2191 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2192 * back buffer directly.
2193 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2194 * ximage - pointer to back buffer's XImage, or NULL
2195 * Return: GL_TRUE = context is double buffered
2196 * GL_FALSE = context is single buffered
2198 #ifndef XFree86Server
2199 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
2200 XMesaPixmap
*pixmap
,
2201 XMesaImage
**ximage
)
2205 *pixmap
= b
->backxrb
->pixmap
;
2207 *ximage
= b
->backxrb
->ximage
;
2216 #endif /* XFree86Server */
2220 * Return the depth buffer associated with an XMesaBuffer.
2221 * Input: b - the XMesa buffer handle
2222 * Output: width, height - size of buffer in pixels
2223 * bytesPerValue - bytes per depth value (2 or 4)
2224 * buffer - pointer to depth buffer values
2225 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2227 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
2228 GLint
*bytesPerValue
, void **buffer
)
2230 struct gl_renderbuffer
*rb
2231 = b
->mesa_buffer
.Attachment
[BUFFER_DEPTH
].Renderbuffer
;
2232 if (!rb
|| !rb
->Data
) {
2240 *width
= b
->mesa_buffer
.Width
;
2241 *height
= b
->mesa_buffer
.Height
;
2242 *bytesPerValue
= b
->mesa_buffer
.Visual
.depthBits
<= 16
2243 ? sizeof(GLushort
) : sizeof(GLuint
);
2250 void XMesaFlush( XMesaContext c
)
2252 if (c
&& c
->xm_visual
) {
2253 #ifdef XFree86Server
2256 XSync( c
->xm_visual
->display
, False
);
2263 const char *XMesaGetString( XMesaContext c
, int name
)
2266 if (name
==XMESA_VERSION
) {
2269 else if (name
==XMESA_EXTENSIONS
) {
2279 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2282 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2283 if (b
->frontxrb
->drawable
== d
&& b
->display
== dpy
) {
2292 * Free/destroy all XMesaBuffers associated with given display.
2294 void xmesa_destroy_buffers_on_display(XMesaDisplay
*dpy
)
2296 XMesaBuffer b
, next
;
2297 for (b
= XMesaBufferList
; b
; b
= next
) {
2299 if (b
->display
== dpy
) {
2300 xmesa_free_buffer(b
);
2307 * Look for XMesaBuffers whose X window has been destroyed.
2308 * Deallocate any such XMesaBuffers.
2310 void XMesaGarbageCollect( void )
2312 XMesaBuffer b
, next
;
2313 for (b
=XMesaBufferList
; b
; b
=next
) {
2315 if (b
->display
&& b
->frontxrb
->drawable
&& b
->type
== WINDOW
) {
2316 #ifdef XFree86Server
2319 XSync(b
->display
, False
);
2320 if (!window_exists( b
->display
, b
->frontxrb
->drawable
)) {
2321 /* found a dead window, free the ancillary info */
2322 XMesaDestroyBuffer( b
);
2330 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2331 GLfloat red
, GLfloat green
,
2332 GLfloat blue
, GLfloat alpha
)
2334 GLcontext
*ctx
= &xmesa
->mesa
;
2335 GLint r
= (GLint
) (red
* 255.0F
);
2336 GLint g
= (GLint
) (green
* 255.0F
);
2337 GLint b
= (GLint
) (blue
* 255.0F
);
2338 GLint a
= (GLint
) (alpha
* 255.0F
);
2340 switch (xmesa
->pixelformat
) {
2346 PACK_TRUECOLOR( p
, r
, g
, b
);
2350 return PACK_8A8B8G8R( r
, g
, b
, a
);
2352 return PACK_8A8R8G8B( r
, g
, b
, a
);
2354 return PACK_8R8G8B( r
, g
, b
);
2356 return PACK_5R6G5B( r
, g
, b
);
2360 return DITHER( x
, y
, r
, g
, b
);
2363 /* 382 = (3*255)/2 */
2364 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2366 return DITHER_HPCR(x
, y
, r
, g
, b
);
2370 return LOOKUP( r
, g
, b
);
2373 return GRAY_RGB( r
, g
, b
);
2374 case PF_Dither_5R6G5B
:
2376 case PF_Dither_True
:
2379 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2383 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");
2390 * This is typically called when the window size changes and we need
2391 * to reallocate the buffer's back/depth/stencil/accum buffers.
2394 XMesaResizeBuffers( XMesaBuffer b
)
2396 GET_CURRENT_CONTEXT(ctx
);
2397 XMesaContext xmctx
= XMESA_CONTEXT(ctx
);
2400 xmesa_check_and_update_buffer_size(xmctx
, b
);
2405 xbuffer_to_renderbuffer(int buffer
)
2407 assert(MAX_AUX_BUFFERS
<= 4);
2410 case GLX_FRONT_LEFT_EXT
:
2411 return BUFFER_FRONT_LEFT
;
2412 case GLX_FRONT_RIGHT_EXT
:
2413 return BUFFER_FRONT_RIGHT
;
2414 case GLX_BACK_LEFT_EXT
:
2415 return BUFFER_BACK_LEFT
;
2416 case GLX_BACK_RIGHT_EXT
:
2417 return BUFFER_BACK_RIGHT
;
2430 /* BadValue error */
2437 XMesaBindTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
,
2438 const int *attrib_list
)
2441 GET_CURRENT_CONTEXT(ctx
);
2442 const GLuint unit
= ctx
->Texture
.CurrentUnit
;
2443 struct gl_texture_unit
*texUnit
= &ctx
->Texture
.Unit
[unit
];
2444 struct gl_texture_object
*texObj
;
2446 struct gl_renderbuffer
*rb
;
2447 struct xmesa_renderbuffer
*xrb
;
2449 XMesaImage
*img
= NULL
;
2450 GLboolean freeImg
= GL_FALSE
;
2452 b
= xbuffer_to_renderbuffer(buffer
);
2456 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_NONE_EXT
)
2457 return; /* BadMatch error */
2459 rb
= drawable
->mesa_buffer
.Attachment
[b
].Renderbuffer
;
2461 /* invalid buffer */
2464 xrb
= xmesa_renderbuffer(rb
);
2467 switch (drawable
->TextureTarget
) {
2468 case GLX_TEXTURE_1D_EXT
:
2469 texObj
= texUnit
->CurrentTex
[TEXTURE_1D_INDEX
];
2471 case GLX_TEXTURE_2D_EXT
:
2472 texObj
= texUnit
->CurrentTex
[TEXTURE_2D_INDEX
];
2474 case GLX_TEXTURE_RECTANGLE_EXT
:
2475 texObj
= texUnit
->CurrentTex
[TEXTURE_RECT_INDEX
];
2478 return; /* BadMatch error */
2483 * The following is a quick and simple way to implement
2484 * BindTexImage. The better way is to write some new FetchTexel()
2485 * functions which would extract texels from XImages. We'd still
2486 * need to use GetImage when texturing from a Pixmap (front buffer)
2487 * but texturing from a back buffer (XImage) would avoid an image
2493 img
= XMesaGetImage(dpy
, xrb
->pixmap
, 0, 0, rb
->Width
, rb
->Height
, ~0L,
2497 else if (xrb
->ximage
) {
2501 /* store the XImage as a new texture image */
2503 GLenum format
, type
, intFormat
;
2504 if (img
->bits_per_pixel
== 32) {
2506 type
= GL_UNSIGNED_BYTE
;
2507 intFormat
= GL_RGBA
;
2509 else if (img
->bits_per_pixel
== 24) {
2511 type
= GL_UNSIGNED_BYTE
;
2514 else if (img
->bits_per_pixel
== 16) {
2516 type
= GL_UNSIGNED_SHORT_5_6_5
;
2520 _mesa_problem(NULL
, "Unexpected XImage format in XMesaBindTexImage");
2523 if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGBA_EXT
) {
2524 intFormat
= GL_RGBA
;
2526 else if (drawable
->TextureFormat
== GLX_TEXTURE_FORMAT_RGB_EXT
) {
2530 _mesa_TexImage2D(GL_TEXTURE_2D
, 0, intFormat
, rb
->Width
, rb
->Height
, 0,
2531 format
, type
, img
->data
);
2534 XMesaDestroyImage(img
);
2542 XMesaReleaseTexImage(XMesaDisplay
*dpy
, XMesaBuffer drawable
, int buffer
)
2544 const GLint b
= xbuffer_to_renderbuffer(buffer
);