1 /* $Id: xm_api.c,v 1.17 2001/03/03 20:33:30 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
29 * This file contains the implementations of all the XMesa* functions.
34 * The window coordinate system origin (0,0) is in the lower-left corner
35 * of the window. X11's window coordinate origin is in the upper-left
36 * corner of the window. Therefore, most drawing functions in this
37 * file have to flip Y coordinates.
39 * Define USE_XSHM in the Makefile with -DUSE_XSHM if you want to compile
40 * in support for the MIT Shared Memory extension. If enabled, when you
41 * use an Ximage for the back buffer in double buffered mode, the "swap"
42 * operation will be faster. You must also link with -lXext.
44 * Byte swapping: If the Mesa host and the X display use a different
45 * byte order then there's some trickiness to be aware of when using
46 * XImages. The byte ordering used for the XImage is that of the X
47 * display, not the Mesa host.
48 * The color-to-pixel encoding for True/DirectColor must be done
49 * according to the display's visual red_mask, green_mask, and blue_mask.
50 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
51 * do byte swapping if needed. If one wants to directly "poke" the pixel
52 * into the XImage's buffer then the pixel must be byte swapped first. In
53 * Mesa, when byte swapping is needed we use the PF_TRUECOLOR pixel format
54 * and use XPutPixel everywhere except in the implementation of
55 * glClear(GL_COLOR_BUFFER_BIT). We want this function to be fast so
56 * instead of using XPutPixel we "poke" our values after byte-swapping
57 * the clear pixel value if needed.
66 #include "glxheader.h"
70 #include "extensions.h"
79 #include "swrast/swrast.h"
80 #include "swrast_setup/swrast_setup.h"
81 #include "array_cache/acache.h"
85 #define GLX_NONE_EXT 0x8000
90 * Global X driver lock
92 _glthread_Mutex _xmesa_lock
;
97 * Lookup tables for HPCR pixel format:
99 static short hpcr_rgbTbl
[3][256] = {
101 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
102 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
103 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
104 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
105 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
106 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
107 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
108 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
109 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
110 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
111 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
112 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
113 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
114 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
115 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
116 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
119 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
120 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
121 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
122 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
123 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
124 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
125 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
126 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
127 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
128 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
129 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
130 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
131 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
132 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
133 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
134 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239
137 32, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37, 38, 38, 39, 39,
138 40, 40, 41, 41, 42, 42, 43, 43, 44, 44, 45, 45, 46, 46, 47, 47,
139 48, 48, 49, 49, 50, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
140 56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63,
141 64, 64, 65, 65, 66, 66, 67, 67, 68, 68, 69, 69, 70, 70, 71, 71,
142 72, 72, 73, 73, 74, 74, 75, 75, 76, 76, 77, 77, 78, 78, 79, 79,
143 80, 80, 81, 81, 82, 82, 83, 83, 84, 84, 85, 85, 86, 86, 87, 87,
144 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95,
145 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
146 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127,
147 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
148 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
149 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
150 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
151 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
152 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
158 /**********************************************************************/
159 /***** X Utility Functions *****/
160 /**********************************************************************/
164 * X/Mesa error reporting function:
166 static void error( const char *msg
)
168 if (getenv("MESA_DEBUG"))
169 fprintf( stderr
, "X/Mesa error: %s\n", msg
);
174 * Return the host's byte order as LSBFirst or MSBFirst ala X.
176 #ifndef XFree86Server
177 static int host_byte_order( void )
180 char *cptr
= (char *) &i
;
181 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
189 #ifndef XFree86Server
190 static int mesaXErrorFlag
= 0;
192 static int mesaHandleXError( XMesaDisplay
*dpy
, XErrorEvent
*event
)
203 * Check if the X Shared Memory extension is available.
204 * Return: 0 = not available
205 * 1 = shared XImage support available
206 * 2 = shared Pixmap support available also
208 #ifndef XFree86Server
209 static int check_for_xshm( XMesaDisplay
*display
)
212 int major
, minor
, ignore
;
215 if (XQueryExtension( display
, "MIT-SHM", &ignore
, &ignore
, &ignore
)) {
216 if (XShmQueryVersion( display
, &major
, &minor
, &pixmaps
)==True
) {
217 return (pixmaps
==True
) ? 2 : 1;
227 /* Can't compile XSHM support */
235 * Return the width and height of the given drawable.
237 static void get_drawable_size( XMesaDisplay
*dpy
, XMesaDrawable d
,
238 unsigned int *width
, unsigned int *height
)
247 unsigned int bw
, depth
;
249 _glthread_LOCK_MUTEX(_xmesa_lock
);
250 XGetGeometry( dpy
, d
, &root
, &x
, &y
, width
, height
, &bw
, &depth
);
251 _glthread_UNLOCK_MUTEX(_xmesa_lock
);
257 * Apply gamma correction to an intensity value in [0..max]. Return the
258 * new intensity value.
260 static GLint
gamma_adjust( GLfloat gamma
, GLint value
, GLint max
)
266 double x
= (double) value
/ (double) max
;
267 return (GLint
) ((GLfloat
) max
* pow( x
, 1.0F
/gamma
) + 0.5F
);
274 * Return the true number of bits per pixel for XImages.
275 * For example, if we request a 24-bit deep visual we may actually need/get
276 * 32bpp XImages. This function returns the appropriate bpp.
277 * Input: dpy - the X display
278 * visinfo - desribes the visual to be used for XImages
279 * Return: true number of bits per pixel for XImages
281 #define GET_BITS_PER_PIXEL(xmv) bits_per_pixel(xmv)
285 static int bits_per_pixel( XMesaVisual xmv
)
287 XMesaVisualInfo visinfo
= xmv
->visinfo
;
288 const int depth
= visinfo
->nplanes
;
290 for (i
= 0; i
< screenInfo
.numPixmapFormats
; i
++) {
291 if (screenInfo
.formats
[i
].depth
== depth
)
292 return screenInfo
.formats
[i
].bitsPerPixel
;
294 return depth
; /* should never get here, but this should be safe */
299 static int bits_per_pixel( XMesaVisual xmv
)
301 XMesaDisplay
*dpy
= xmv
->display
;
302 XMesaVisualInfo visinfo
= xmv
->visinfo
;
305 /* Create a temporary XImage */
306 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
307 ZPixmap
, 0, /*format, offset*/
308 (char*) MALLOC(8), /*data*/
309 1, 1, /*width, height*/
314 /* grab the bits/pixel value */
315 bitsPerPixel
= img
->bits_per_pixel
;
316 /* free the XImage */
319 XMesaDestroyImage( img
);
327 * Determine if a given X window ID is valid (window exists).
328 * Do this by calling XGetWindowAttributes() for the window and
329 * checking if we catch an X error.
330 * Input: dpy - the display
331 * win - the window to check for existance
332 * Return: GL_TRUE - window exists
333 * GL_FALSE - window doesn't exist
335 #ifndef XFree86Server
336 static GLboolean WindowExistsFlag
;
338 static int window_exists_err_handler( XMesaDisplay
* dpy
, XErrorEvent
* xerr
)
341 if (xerr
->error_code
== BadWindow
) {
342 WindowExistsFlag
= GL_FALSE
;
347 static GLboolean
window_exists( XMesaDisplay
*dpy
, Window win
)
349 XWindowAttributes wa
;
350 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
351 WindowExistsFlag
= GL_TRUE
;
352 old_handler
= XSetErrorHandler(window_exists_err_handler
);
353 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
354 XSetErrorHandler(old_handler
);
355 return WindowExistsFlag
;
361 /**********************************************************************/
362 /***** Linked list of XMesaBuffers *****/
363 /**********************************************************************/
365 static XMesaBuffer XMesaBufferList
= NULL
;
368 /* Allocate a new XMesaBuffer, add to linked list */
369 static XMesaBuffer
alloc_xmesa_buffer(void)
371 XMesaBuffer b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
373 b
->Next
= XMesaBufferList
;
381 * Find an XMesaBuffer by matching X display and colormap but NOT matching
382 * the notThis buffer.
384 static XMesaBuffer
find_xmesa_buffer(XMesaDisplay
*dpy
,
389 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
390 if (b
->display
==dpy
&& b
->cmap
==cmap
&& b
!=notThis
) {
399 * Free an XMesaBuffer, remove from linked list, perhaps free X colormap
402 static void free_xmesa_buffer(int client
, XMesaBuffer buffer
)
404 XMesaBuffer prev
= NULL
, b
;
406 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
408 /* unlink bufer from list */
410 prev
->Next
= buffer
->Next
;
412 XMesaBufferList
= buffer
->Next
;
413 /* Check to free X colors */
414 if (buffer
->num_alloced
>0) {
415 /* If no other buffer uses this X colormap then free the colors. */
416 if (!find_xmesa_buffer(buffer
->display
, buffer
->cmap
, buffer
)) {
418 (void)FreeColors(buffer
->cmap
, client
,
419 buffer
->num_alloced
, buffer
->alloced_colors
,
422 XFreeColors(buffer
->display
, buffer
->cmap
,
423 buffer
->alloced_colors
, buffer
->num_alloced
, 0);
430 /* continue search */
433 /* buffer not found in XMesaBufferList */
434 _mesa_problem(NULL
,"free_xmesa_buffer() - buffer not found\n");
438 /* Copy X color table stuff from one XMesaBuffer to another. */
439 static void copy_colortable_info(XMesaBuffer dst
, const XMesaBuffer src
)
441 MEMCPY(dst
->color_table
, src
->color_table
, sizeof(src
->color_table
));
442 MEMCPY(dst
->pixel_to_r
, src
->pixel_to_r
, sizeof(src
->pixel_to_r
));
443 MEMCPY(dst
->pixel_to_g
, src
->pixel_to_g
, sizeof(src
->pixel_to_g
));
444 MEMCPY(dst
->pixel_to_b
, src
->pixel_to_b
, sizeof(src
->pixel_to_b
));
445 dst
->num_alloced
= src
->num_alloced
;
446 MEMCPY(dst
->alloced_colors
, src
->alloced_colors
,
447 sizeof(src
->alloced_colors
));
452 /**********************************************************************/
453 /***** Misc Private Functions *****/
454 /**********************************************************************/
458 * Return number of bits set in n.
460 static int bitcount( unsigned long n
)
463 for (bits
=0; n
>0; n
=n
>>1) {
474 * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
475 * Return: GL_TRUE if success, GL_FALSE if error
477 #ifndef XFree86Server
478 static GLboolean
alloc_shm_back_buffer( XMesaBuffer b
)
482 * We have to do a _lot_ of error checking here to be sure we can
483 * really use the XSHM extension. It seems different servers trigger
484 * errors at different points if the extension won't work. Therefore
485 * we have to be very careful...
488 int (*old_handler
)( XMesaDisplay
*, XErrorEvent
* );
490 b
->backimage
= XShmCreateImage( b
->xm_visual
->display
,
491 b
->xm_visual
->visinfo
->visual
,
492 b
->xm_visual
->visinfo
->depth
,
493 ZPixmap
, NULL
, &b
->shminfo
,
494 b
->width
, b
->height
);
495 if (b
->backimage
== NULL
) {
496 error("alloc_back_buffer: Shared memory error (XShmCreateImage), disabling.");
501 b
->shminfo
.shmid
= shmget( IPC_PRIVATE
, b
->backimage
->bytes_per_line
502 * b
->backimage
->height
, IPC_CREAT
|0777 );
503 if (b
->shminfo
.shmid
< 0) {
504 if (getenv("MESA_DEBUG"))
505 perror("alloc_back_buffer");
506 XDestroyImage( b
->backimage
);
508 error("alloc_back_buffer: Shared memory error (shmget), disabling.");
513 b
->shminfo
.shmaddr
= b
->backimage
->data
514 = (char*)shmat( b
->shminfo
.shmid
, 0, 0 );
515 if (b
->shminfo
.shmaddr
== (char *) -1) {
516 if (getenv("MESA_DEBUG"))
517 perror("alloc_back_buffer");
518 XDestroyImage( b
->backimage
);
519 shmctl( b
->shminfo
.shmid
, IPC_RMID
, 0 );
521 error("alloc_back_buffer: Shared memory error (shmat), disabling.");
526 b
->shminfo
.readOnly
= False
;
528 old_handler
= XSetErrorHandler( mesaHandleXError
);
529 /* This may trigger the X protocol error we're ready to catch: */
530 XShmAttach( b
->xm_visual
->display
, &b
->shminfo
);
531 XSync( b
->xm_visual
->display
, False
);
533 if (mesaXErrorFlag
) {
534 /* we are on a remote display, this error is normal, don't print it */
535 XFlush( b
->xm_visual
->display
);
537 XDestroyImage( b
->backimage
);
538 shmdt( b
->shminfo
.shmaddr
);
539 shmctl( b
->shminfo
.shmid
, IPC_RMID
, 0 );
542 (void) XSetErrorHandler( old_handler
);
546 shmctl( b
->shminfo
.shmid
, IPC_RMID
, 0 ); /* nobody else needs it */
548 /* Finally, try an XShmPutImage to be really sure the extension works */
549 gc
= XCreateGC( b
->xm_visual
->display
, b
->frontbuffer
, 0, NULL
);
550 XShmPutImage( b
->xm_visual
->display
, b
->frontbuffer
, gc
,
551 b
->backimage
, 0, 0, 0, 0, 1, 1 /*one pixel*/, False
);
552 XSync( b
->xm_visual
->display
, False
);
553 XFreeGC( b
->xm_visual
->display
, gc
);
554 (void) XSetErrorHandler( old_handler
);
555 if (mesaXErrorFlag
) {
556 XFlush( b
->xm_visual
->display
);
558 XDestroyImage( b
->backimage
);
559 shmdt( b
->shminfo
.shmaddr
);
560 shmctl( b
->shminfo
.shmid
, IPC_RMID
, 0 );
567 int height
= b
->backimage
->height
;
568 /* Needed by PIXELADDR1 macro */
569 b
->ximage_width1
= b
->backimage
->bytes_per_line
;
570 b
->ximage_origin1
= (GLubyte
*) b
->backimage
->data
571 + b
->ximage_width1
* (height
-1);
572 /* Needed by PIXELADDR2 macro */
573 b
->ximage_width2
= b
->backimage
->bytes_per_line
/ 2;
574 b
->ximage_origin2
= (GLushort
*) b
->backimage
->data
575 + b
->ximage_width2
* (height
-1);
576 /* Needed by PIXELADDR3 macro */
577 b
->ximage_width3
= b
->backimage
->bytes_per_line
;
578 b
->ximage_origin3
= (GLubyte
*) b
->backimage
->data
579 + b
->ximage_width3
* (height
-1);
580 /* Needed by PIXELADDR4 macro */
581 b
->ximage_width4
= b
->backimage
->width
;
582 b
->ximage_origin4
= (GLuint
*) b
->backimage
->data
583 + b
->ximage_width4
* (height
-1);
588 /* Can't compile XSHM support */
597 * Setup an off-screen pixmap or Ximage to use as the back buffer.
598 * Input: b - the X/Mesa buffer
600 void xmesa_alloc_back_buffer( XMesaBuffer b
)
602 if (b
->db_state
==BACK_XIMAGE
) {
603 /* Deallocate the old backimage, if any */
605 #if defined(USE_XSHM) && !defined(XFree86Server)
607 XShmDetach( b
->xm_visual
->display
, &b
->shminfo
);
608 XDestroyImage( b
->backimage
);
609 shmdt( b
->shminfo
.shmaddr
);
613 XMesaDestroyImage( b
->backimage
);
617 /* Allocate new back buffer */
620 /* Allocate a regular XImage for the back buffer. */
621 b
->backimage
= XMesaCreateImage(b
->xm_visual
->BitsPerPixel
,
622 b
->width
, b
->height
, NULL
);
625 || alloc_shm_back_buffer(b
)==GL_FALSE
627 /* Allocate a regular XImage for the back buffer. */
628 b
->backimage
= XCreateImage( b
->xm_visual
->display
,
629 b
->xm_visual
->visinfo
->visual
,
630 GET_VISUAL_DEPTH(b
->xm_visual
),
631 ZPixmap
, 0, /* format, offset */
632 NULL
, b
->width
, b
->height
,
633 8, 0 ); /* pad, bytes_per_line */
636 error("alloc_back_buffer: XCreateImage failed.");
638 b
->backimage
->data
= (char *) MALLOC( b
->backimage
->height
639 * b
->backimage
->bytes_per_line
);
640 if (!b
->backimage
->data
) {
641 error("alloc_back_buffer: MALLOC failed.");
642 XMesaDestroyImage( b
->backimage
);
646 b
->backpixmap
= None
;
648 else if (b
->db_state
==BACK_PIXMAP
) {
649 XMesaPixmap old_pixmap
= b
->backpixmap
;
650 /* Free the old back pixmap */
652 XMesaFreePixmap( b
->xm_visual
->display
, b
->backpixmap
);
654 /* Allocate new back pixmap */
655 b
->backpixmap
= XMesaCreatePixmap( b
->xm_visual
->display
, b
->frontbuffer
,
657 GET_VISUAL_DEPTH(b
->xm_visual
) );
659 /* update other references to backpixmap */
660 if (b
->buffer
==(XMesaDrawable
)old_pixmap
) {
661 b
->buffer
= (XMesaDrawable
)b
->backpixmap
;
669 * A replacement for XAllocColor. This function should never
670 * fail to allocate a color. When XAllocColor fails, we return
671 * the nearest matching color. If we have to allocate many colors
672 * this function isn't too efficient; the XQueryColors() could be
674 * Written by Michael Pichler, Brian Paul, Mark Kilgard
675 * Input: dpy - X display
677 * cmapSize - size of colormap
678 * In/Out: color - the XColor struct
679 * Output: exact - 1=exact color match, 0=closest match
680 * alloced - 1=XAlloc worked, 0=XAlloc failed
683 noFaultXAllocColor( int client
,
688 int *exact
, int *alloced
)
694 /* we'll try to cache ctable for better remote display performance */
695 static Display
*prevDisplay
= NULL
;
696 static XMesaColormap prevCmap
= 0;
697 static int prevCmapSize
= 0;
698 static XMesaColor
*ctable
= NULL
;
702 double mindist
; /* 3*2^16^2 exceeds long int precision. */
706 /* First try just using XAllocColor. */
709 &color
->red
, &color
->green
, &color
->blue
,
711 client
) == Success
) {
713 if (XAllocColor(dpy
, cmap
, color
)) {
720 /* Alloc failed, search for closest match */
722 /* Retrieve color table entries. */
723 /* XXX alloca candidate. */
725 ppixIn
= (Pixel
*) MALLOC(cmapSize
* sizeof(Pixel
));
726 ctable
= (xrgb
*) MALLOC(cmapSize
* sizeof(xrgb
));
727 for (i
= 0; i
< cmapSize
; i
++) {
730 QueryColors(cmap
, cmapSize
, ppixIn
, ctable
);
732 if (prevDisplay
!= dpy
|| prevCmap
!= cmap
733 || prevCmapSize
!= cmapSize
|| !ctable
) {
734 /* free previously cached color table */
737 /* Get the color table from X */
738 ctable
= (XMesaColor
*) MALLOC(cmapSize
* sizeof(XMesaColor
));
740 for (i
= 0; i
< cmapSize
; i
++) {
743 XQueryColors(dpy
, cmap
, ctable
, cmapSize
);
746 prevCmapSize
= cmapSize
;
750 /* Find best match. */
753 for (i
= 0; i
< cmapSize
; i
++) {
754 double dr
= 0.30 * ((double) color
->red
- (double) ctable
[i
].red
);
755 double dg
= 0.59 * ((double) color
->green
- (double) ctable
[i
].green
);
756 double db
= 0.11 * ((double) color
->blue
- (double) ctable
[i
].blue
);
757 double dist
= dr
* dr
+ dg
* dg
+ db
* db
;
758 if (bestmatch
< 0 || dist
< mindist
) {
765 subColor
.red
= ctable
[bestmatch
].red
;
766 subColor
.green
= ctable
[bestmatch
].green
;
767 subColor
.blue
= ctable
[bestmatch
].blue
;
768 /* Try to allocate the closest match color. This should only
769 * fail if the cell is read/write. Otherwise, we're incrementing
770 * the cell's reference count.
774 &subColor
.red
, &subColor
.green
, &subColor
.blue
,
776 client
) == Success
) {
778 if (XAllocColor(dpy
, cmap
, &subColor
)) {
783 /* do this to work around a problem reported by Frank Ortega */
784 subColor
.pixel
= (unsigned long) bestmatch
;
785 subColor
.red
= ctable
[bestmatch
].red
;
786 subColor
.green
= ctable
[bestmatch
].green
;
787 subColor
.blue
= ctable
[bestmatch
].blue
;
788 subColor
.flags
= DoRed
| DoGreen
| DoBlue
;
795 /* don't free table, save it for next time */
806 * Do setup for PF_GRAYSCALE pixel format.
807 * Note that buffer may be NULL.
809 static GLboolean
setup_grayscale( int client
, XMesaVisual v
,
810 XMesaBuffer buffer
, XMesaColormap cmap
)
812 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
817 XMesaBuffer prevBuffer
;
823 prevBuffer
= find_xmesa_buffer(v
->display
, cmap
, buffer
);
825 (buffer
->xm_visual
->gl_visual
->rgbMode
==
826 prevBuffer
->xm_visual
->gl_visual
->rgbMode
)) {
827 /* Copy colormap stuff from previous XMesaBuffer which uses same
828 * X colormap. Do this to avoid time spent in noFaultXAllocColor.
830 copy_colortable_info(buffer
, prevBuffer
);
833 /* Allocate 256 shades of gray */
835 int colorsfailed
= 0;
836 for (gray
=0;gray
<256;gray
++) {
837 GLint r
= gamma_adjust( v
->RedGamma
, gray
, 255 );
838 GLint g
= gamma_adjust( v
->GreenGamma
, gray
, 255 );
839 GLint b
= gamma_adjust( v
->BlueGamma
, gray
, 255 );
842 xcol
.red
= (r
<< 8) | r
;
843 xcol
.green
= (g
<< 8) | g
;
844 xcol
.blue
= (b
<< 8) | b
;
845 noFaultXAllocColor( client
, v
->display
,
846 cmap
, GET_COLORMAP_SIZE(v
),
847 &xcol
, &exact
, &alloced
);
852 assert(buffer
->num_alloced
<256);
853 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
854 buffer
->num_alloced
++;
859 buffer->color_table[gray*3+0] = xcol.pixel;
860 buffer->color_table[gray*3+1] = xcol.pixel;
861 buffer->color_table[gray*3+2] = xcol.pixel;
862 assert(xcol.pixel < 65536);
863 buffer->pixel_to_r[xcol.pixel] = gray * 30 / 100;
864 buffer->pixel_to_g[xcol.pixel] = gray * 59 / 100;
865 buffer->pixel_to_b[xcol.pixel] = gray * 11 / 100;
867 buffer
->color_table
[gray
] = xcol
.pixel
;
868 assert(xcol
.pixel
< 65536);
869 buffer
->pixel_to_r
[xcol
.pixel
] = gray
;
870 buffer
->pixel_to_g
[xcol
.pixel
] = gray
;
871 buffer
->pixel_to_b
[xcol
.pixel
] = gray
;
874 if (colorsfailed
&& getenv("MESA_DEBUG")) {
876 "Note: %d out of 256 needed colors do not match exactly.\n",
882 v
->dithered_pf
= PF_GRAYSCALE
;
883 v
->undithered_pf
= PF_GRAYSCALE
;
890 * Setup RGB rendering for a window with a PseudoColor, StaticColor,
891 * or 8-bit TrueColor visual visual. We try to allocate a palette of 225
892 * colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
893 * color. While this function was originally designed just for 8-bit
894 * visuals, it has also proven to work from 4-bit up to 16-bit visuals.
895 * Dithering code contributed by Bob Mercier.
897 static GLboolean
setup_dithered_color( int client
, XMesaVisual v
,
898 XMesaBuffer buffer
, XMesaColormap cmap
)
900 if (GET_VISUAL_DEPTH(v
)<4 || GET_VISUAL_DEPTH(v
)>16) {
905 XMesaBuffer prevBuffer
;
911 prevBuffer
= find_xmesa_buffer(v
->display
, cmap
, buffer
);
913 (buffer
->xm_visual
->gl_visual
->rgbMode
==
914 prevBuffer
->xm_visual
->gl_visual
->rgbMode
)) {
915 /* Copy colormap stuff from previous, matching XMesaBuffer.
916 * Do this to avoid time spent in noFaultXAllocColor.
918 copy_colortable_info(buffer
, prevBuffer
);
921 /* Allocate X colors and initialize color_table[], red_table[], etc */
923 int colorsfailed
= 0;
924 for (r
= 0; r
< _R
; r
++) {
925 for (g
= 0; g
< _G
; g
++) {
926 for (b
= 0; b
< _B
; b
++) {
929 xcol
.red
=gamma_adjust(v
->RedGamma
, r
*65535/(_R
-1),65535);
930 xcol
.green
=gamma_adjust(v
->GreenGamma
, g
*65535/(_G
-1),65535);
931 xcol
.blue
=gamma_adjust(v
->BlueGamma
, b
*65535/(_B
-1),65535);
932 noFaultXAllocColor( client
, v
->display
,
933 cmap
, GET_COLORMAP_SIZE(v
),
934 &xcol
, &exact
, &alloced
);
939 assert(buffer
->num_alloced
<256);
940 buffer
->alloced_colors
[buffer
->num_alloced
] = xcol
.pixel
;
941 buffer
->num_alloced
++;
945 buffer
->color_table
[i
] = xcol
.pixel
;
946 assert(xcol
.pixel
< 65536);
947 buffer
->pixel_to_r
[xcol
.pixel
] = r
* 255 / (_R
-1);
948 buffer
->pixel_to_g
[xcol
.pixel
] = g
* 255 / (_G
-1);
949 buffer
->pixel_to_b
[xcol
.pixel
] = b
* 255 / (_B
-1);
954 if (colorsfailed
&& getenv("MESA_DEBUG")) {
956 "Note: %d out of %d needed colors do not match exactly.\n",
957 colorsfailed
, _R
*_G
*_B
);
962 v
->dithered_pf
= PF_DITHER
;
963 v
->undithered_pf
= PF_LOOKUP
;
969 * Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
970 * HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
971 * Special dithering tables have to be initialized.
973 static void setup_8bit_hpcr( XMesaVisual v
)
975 /* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
976 * To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
977 * on the root window AND the colormap obtainable by XGetRGBColormaps
978 * for that atom must be set on the window. (see also tkInitWindow)
979 * If that colormap is not set, the output will look stripy.
982 /* Setup color tables with gamma correction */
986 g
= 1.0 / v
->RedGamma
;
987 for (i
=0; i
<256; i
++) {
988 GLint red
= (GLint
) (255.0 * pow( hpcr_rgbTbl
[0][i
]/255.0, g
) + 0.5);
989 v
->hpcr_rgbTbl
[0][i
] = CLAMP( red
, 16, 239 );
992 g
= 1.0 / v
->GreenGamma
;
993 for (i
=0; i
<256; i
++) {
994 GLint green
= (GLint
) (255.0 * pow( hpcr_rgbTbl
[1][i
]/255.0, g
) + 0.5);
995 v
->hpcr_rgbTbl
[1][i
] = CLAMP( green
, 16, 239 );
998 g
= 1.0 / v
->BlueGamma
;
999 for (i
=0; i
<256; i
++) {
1000 GLint blue
= (GLint
) (255.0 * pow( hpcr_rgbTbl
[2][i
]/255.0, g
) + 0.5);
1001 v
->hpcr_rgbTbl
[2][i
] = CLAMP( blue
, 32, 223 );
1003 v
->undithered_pf
= PF_HPCR
; /* can't really disable dithering for now */
1004 v
->dithered_pf
= PF_HPCR
;
1006 /* which method should I use to clear */
1007 /* GL_FALSE: keep the ordinary method */
1008 /* GL_TRUE : clear with dither pattern */
1009 v
->hpcr_clear_flag
= getenv("MESA_HPCR_CLEAR") ? GL_TRUE
: GL_FALSE
;
1011 if (v
->hpcr_clear_flag
) {
1012 v
->hpcr_clear_pixmap
= XMesaCreatePixmap(v
->display
,
1013 DefaultRootWindow(v
->display
),
1015 #ifndef XFree86Server
1016 v
->hpcr_clear_ximage
= XGetImage(v
->display
, v
->hpcr_clear_pixmap
,
1017 0, 0, 16, 2, AllPlanes
, ZPixmap
);
1024 * Setup RGB rendering for a window with a True/DirectColor visual.
1026 static void setup_truecolor( XMesaVisual v
, XMesaBuffer buffer
,
1027 XMesaWindow window
, XMesaColormap cmap
)
1029 unsigned long rmask
, gmask
, bmask
;
1034 /* Compute red multiplier (mask) and bit shift */
1036 rmask
= GET_REDMASK(v
);
1037 while ((rmask
& 1)==0) {
1042 /* Compute green multiplier (mask) and bit shift */
1044 gmask
= GET_GREENMASK(v
);
1045 while ((gmask
& 1)==0) {
1050 /* Compute blue multiplier (mask) and bit shift */
1052 bmask
= GET_BLUEMASK(v
);
1053 while ((bmask
& 1)==0) {
1059 * Compute component-to-pixel lookup tables and dithering kernel
1062 static GLubyte kernel
[16] = {
1063 0*16, 8*16, 2*16, 10*16,
1064 12*16, 4*16, 14*16, 6*16,
1065 3*16, 11*16, 1*16, 9*16,
1066 15*16, 7*16, 13*16, 5*16,
1068 GLint rBits
= bitcount(rmask
);
1069 GLint gBits
= bitcount(gmask
);
1070 GLint bBits
= bitcount(bmask
);
1074 /* convert pixel components in [0,_mask] to RGB values in [0,255] */
1075 for (i
=0; i
<=rmask
; i
++)
1076 v
->PixelToR
[i
] = (unsigned char) ((i
* 255) / rmask
);
1077 for (i
=0; i
<=gmask
; i
++)
1078 v
->PixelToG
[i
] = (unsigned char) ((i
* 255) / gmask
);
1079 for (i
=0; i
<=bmask
; i
++)
1080 v
->PixelToB
[i
] = (unsigned char) ((i
* 255) / bmask
);
1082 /* convert RGB values from [0,255] to pixel components */
1084 for (i
=0;i
<256;i
++) {
1085 GLint r
= gamma_adjust(v
->RedGamma
, i
, 255);
1086 GLint g
= gamma_adjust(v
->GreenGamma
, i
, 255);
1087 GLint b
= gamma_adjust(v
->BlueGamma
, i
, 255);
1088 v
->RtoPixel
[i
] = (r
>> (8-rBits
)) << v
->rshift
;
1089 v
->GtoPixel
[i
] = (g
>> (8-gBits
)) << v
->gshift
;
1090 v
->BtoPixel
[i
] = (b
>> (8-bBits
)) << v
->bshift
;
1092 /* overflow protection */
1093 for (i
=256;i
<512;i
++) {
1094 v
->RtoPixel
[i
] = v
->RtoPixel
[255];
1095 v
->GtoPixel
[i
] = v
->GtoPixel
[255];
1096 v
->BtoPixel
[i
] = v
->BtoPixel
[255];
1099 /* setup dithering kernel */
1101 if (gBits
> maxBits
) maxBits
= gBits
;
1102 if (bBits
> maxBits
) maxBits
= bBits
;
1103 for (i
=0;i
<16;i
++) {
1104 v
->Kernel
[i
] = kernel
[i
] >> maxBits
;
1107 v
->undithered_pf
= PF_TRUECOLOR
;
1108 v
->dithered_pf
= (GET_VISUAL_DEPTH(v
)<24) ? PF_TRUEDITHER
: PF_TRUECOLOR
;
1112 * Now check for TrueColor visuals which we can optimize.
1114 if ( GET_REDMASK(v
) ==0x0000ff
1115 && GET_GREENMASK(v
)==0x00ff00
1116 && GET_BLUEMASK(v
) ==0xff0000
1117 && CHECK_BYTE_ORDER(v
)
1118 && v
->BitsPerPixel
==32
1119 && sizeof(GLuint
)==4
1120 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1121 /* common 32 bpp config used on SGI, Sun */
1122 v
->undithered_pf
= v
->dithered_pf
= PF_8A8B8G8R
;
1124 else if (GET_REDMASK(v
) ==0xff0000
1125 && GET_GREENMASK(v
)==0x00ff00
1126 && GET_BLUEMASK(v
) ==0x0000ff
1127 && CHECK_BYTE_ORDER(v
)
1128 && v
->BitsPerPixel
==32
1129 && sizeof(GLuint
)==4
1130 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1131 /* common 32 bpp config used on Linux, HP, IBM */
1132 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B
;
1134 else if (GET_REDMASK(v
) ==0xff0000
1135 && GET_GREENMASK(v
)==0x00ff00
1136 && GET_BLUEMASK(v
) ==0x0000ff
1137 && CHECK_BYTE_ORDER(v
)
1138 && v
->BitsPerPixel
==24
1139 && sizeof(GLuint
)==4
1140 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1141 /* common packed 24 bpp config used on Linux */
1142 v
->undithered_pf
= v
->dithered_pf
= PF_8R8G8B24
;
1144 else if (GET_REDMASK(v
) ==0xf800
1145 && GET_GREENMASK(v
)==0x07e0
1146 && GET_BLUEMASK(v
) ==0x001f
1147 && CHECK_BYTE_ORDER(v
)
1148 && v
->BitsPerPixel
==16
1149 && sizeof(GLushort
)==2
1150 && v
->RedGamma
==1.0 && v
->GreenGamma
==1.0 && v
->BlueGamma
==1.0) {
1151 /* 5-6-5 color weight on common PC VGA boards */
1152 v
->undithered_pf
= PF_5R6G5B
;
1153 v
->dithered_pf
= PF_DITHER_5R6G5B
;
1155 else if (GET_REDMASK(v
) ==0xe0
1156 && GET_GREENMASK(v
)==0x1c
1157 && GET_BLUEMASK(v
) ==0x03
1158 && CHECK_FOR_HPCR(v
)) {
1159 setup_8bit_hpcr( v
);
1166 * Setup RGB rendering for a window with a monochrome visual.
1168 static void setup_monochrome( XMesaVisual v
, XMesaBuffer b
)
1171 v
->dithered_pf
= v
->undithered_pf
= PF_1BIT
;
1172 /* if black=1 then we must flip pixel values */
1173 v
->bitFlip
= (GET_BLACK_PIXEL(v
) != 0);
1179 * When a context is "made current" for the first time, we can finally
1180 * finish initializing the context's visual and buffer information.
1181 * Input: v - the XMesaVisual to initialize
1182 * b - the XMesaBuffer to initialize (may be NULL)
1183 * rgb_flag - TRUE = RGBA mode, FALSE = color index mode
1184 * window - the window/pixmap we're rendering into
1185 * cmap - the colormap associated with the window/pixmap
1186 * Return: GL_TRUE=success, GL_FALSE=failure
1188 static GLboolean
initialize_visual_and_buffer( int client
,
1192 XMesaDrawable window
,
1196 #ifndef XFree86Server
1201 assert(b
->xm_visual
== v
);
1204 /* Save true bits/pixel */
1205 v
->BitsPerPixel
= GET_BITS_PER_PIXEL(v
);
1206 assert(v
->BitsPerPixel
> 0);
1209 if (rgb_flag
==GL_FALSE
) {
1210 /* COLOR-INDEXED WINDOW:
1211 * Even if the visual is TrueColor or DirectColor we treat it as
1212 * being color indexed. This is weird but might be useful to someone.
1214 v
->dithered_pf
= v
->undithered_pf
= PF_INDEX
;
1215 v
->index_bits
= GET_VISUAL_DEPTH(v
);
1219 * We support RGB rendering into almost any kind of visual.
1222 xclass
= GET_VISUAL_CLASS(v
);
1223 if (xclass
==TrueColor
|| xclass
==DirectColor
) {
1224 setup_truecolor( v
, b
, (XMesaWindow
)window
, cmap
);
1226 else if (xclass
==StaticGray
&& GET_VISUAL_DEPTH(v
)==1) {
1227 setup_monochrome( v
, b
);
1229 else if (xclass
==GrayScale
|| xclass
==StaticGray
) {
1230 if (!setup_grayscale( client
, v
, b
, cmap
)) {
1234 else if ((xclass
==PseudoColor
|| xclass
==StaticColor
)
1235 && GET_VISUAL_DEPTH(v
)>=4 && GET_VISUAL_DEPTH(v
)<=16) {
1236 if (!setup_dithered_color( client
, v
, b
, cmap
)) {
1241 error("XMesa: RGB mode rendering not supported in given visual.");
1246 if (getenv("MESA_NO_DITHER")) {
1247 v
->dithered_pf
= v
->undithered_pf
;
1253 * If MESA_INFO env var is set print out some debugging info
1254 * which can help Brian figure out what's going on when a user
1257 if (getenv("MESA_INFO")) {
1258 fprintf(stderr
, "X/Mesa visual = %p\n", v
);
1259 fprintf(stderr
, "X/Mesa dithered pf = %u\n", v
->dithered_pf
);
1260 fprintf(stderr
, "X/Mesa undithered pf = %u\n", v
->undithered_pf
);
1261 fprintf(stderr
, "X/Mesa level = %d\n", v
->level
);
1262 fprintf(stderr
, "X/Mesa depth = %d\n", GET_VISUAL_DEPTH(v
));
1263 fprintf(stderr
, "X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
1267 /* Do window-specific initializations */
1269 /* Window dimensions */
1271 get_drawable_size( v
->display
, window
, &w
, &h
);
1275 b
->frontbuffer
= window
;
1277 assert( v
->gl_visual
);
1279 /* Setup for single/double buffering */
1280 if (v
->gl_visual
->doubleBufferMode
) {
1281 /* Double buffered */
1282 #ifndef XFree86Server
1283 b
->shm
= check_for_xshm( v
->display
);
1285 xmesa_alloc_back_buffer( b
);
1286 if (b
->db_state
==BACK_PIXMAP
) {
1287 b
->buffer
= (XMesaDrawable
)b
->backpixmap
;
1294 /* Single Buffered */
1295 b
->buffer
= b
->frontbuffer
;
1298 /* X11 graphics contexts */
1299 #ifdef XFree86Server
1300 b
->gc
= CreateScratchGC(v
->display
, window
->depth
);
1302 b
->gc
= XCreateGC( v
->display
, window
, 0, NULL
);
1304 XMesaSetFunction( v
->display
, b
->gc
, GXcopy
);
1307 * Don't generate Graphics Expose/NoExpose events in swapbuffers().
1308 * Patch contributed by Michael Pichler May 15, 1995.
1310 #ifdef XFree86Server
1311 b
->cleargc
= CreateScratchGC(v
->display
, window
->depth
);
1315 dixChangeGC(NullClient
, b
->cleargc
, GCGraphicsExposures
, v
, NULL
);
1318 gcvalues
.graphics_exposures
= False
;
1319 b
->cleargc
= XCreateGC( v
->display
, window
,
1320 GCGraphicsExposures
, &gcvalues
);
1322 XMesaSetFunction( v
->display
, b
->cleargc
, GXcopy
);
1324 * Set fill style and tile pixmap once for all for HPCR stuff
1325 * (instead of doing it each time in clear_color_HPCR_pixmap())
1326 * Initialize whole stuff
1327 * Patch contributed by Jacques Leroy March 8, 1998.
1329 if (v
->hpcr_clear_flag
&& b
->buffer
!=XIMAGE
) {
1331 for (i
=0; i
<16; i
++)
1333 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 0, 0);
1334 XMesaPutPixel(v
->hpcr_clear_ximage
, i
, 1, 0);
1336 XMesaPutImage(b
->display
, (XMesaDrawable
)v
->hpcr_clear_pixmap
,
1337 b
->cleargc
, v
->hpcr_clear_ximage
, 0, 0, 0, 0, 16, 2);
1338 XMesaSetFillStyle( v
->display
, b
->cleargc
, FillTiled
);
1339 XMesaSetTile( v
->display
, b
->cleargc
, v
->hpcr_clear_pixmap
);
1342 /* Initialize the row buffer XImage for use in write_color_span() */
1343 #ifdef XFree86Server
1344 b
->rowimage
= XMesaCreateImage(GET_VISUAL_DEPTH(v
), MAX_WIDTH
, 1,
1345 (char *)MALLOC(MAX_WIDTH
*4));
1347 b
->rowimage
= XCreateImage( v
->display
,
1350 ZPixmap
, 0, /*format, offset*/
1351 (char*) MALLOC(MAX_WIDTH
*4), /*data*/
1352 MAX_WIDTH
, 1, /*width, height*/
1354 0 /*bytes_per_line*/ );
1364 * Convert an RGBA color to a pixel value.
1367 xmesa_color_to_pixel( XMesaContext xmesa
, GLubyte r
, GLubyte g
, GLubyte b
, GLubyte a
,
1370 switch (pixelFormat
) {
1376 PACK_TRUECOLOR( p
, r
, g
, b
);
1380 return PACK_8A8B8G8R( r
, g
, b
, a
);
1384 return PACK_8R8G8B( r
, g
, b
);
1386 return PACK_5R6G5B( r
, g
, b
);
1390 return DITHER( 1, 0, r
, g
, b
);
1393 /* 382 = (3*255)/2 */
1394 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
1396 return DITHER_HPCR(1, 1, r
, g
, b
);
1400 return LOOKUP( r
, g
, b
);
1403 return GRAY_RGB( r
, g
, b
);
1406 case PF_DITHER_5R6G5B
:
1409 PACK_TRUEDITHER(p
, 1, 0, r
, g
, b
);
1413 _mesa_problem(NULL
, "Bad pixel format in xmesa_color_to_pixel");
1419 /**********************************************************************/
1420 /***** Public Functions *****/
1421 /**********************************************************************/
1425 * Create a new X/Mesa visual.
1426 * Input: display - X11 display
1427 * visinfo - an XVisualInfo pointer
1428 * rgb_flag - GL_TRUE = RGB mode,
1429 * GL_FALSE = color index mode
1430 * alpha_flag - alpha buffer requested?
1431 * db_flag - GL_TRUE = double-buffered,
1432 * GL_FALSE = single buffered
1433 * stereo_flag - stereo visual?
1434 * ximage_flag - GL_TRUE = use an XImage for back buffer,
1435 * GL_FALSE = use an off-screen pixmap for back buffer
1436 * depth_size - requested bits/depth values, or zero
1437 * stencil_size - requested bits/stencil values, or zero
1438 * accum_red_size - requested bits/red accum values, or zero
1439 * accum_green_size - requested bits/green accum values, or zero
1440 * accum_blue_size - requested bits/blue accum values, or zero
1441 * accum_alpha_size - requested bits/alpha accum values, or zero
1442 * num_samples - number of samples/pixel if multisampling, or zero
1443 * level - visual level, usually 0
1444 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT
1445 * Return; a new XMesaVisual or 0 if error.
1447 XMesaVisual
XMesaCreateVisual( XMesaDisplay
*display
,
1448 XMesaVisualInfo visinfo
,
1450 GLboolean alpha_flag
,
1452 GLboolean stereo_flag
,
1453 GLboolean ximage_flag
,
1456 GLint accum_red_size
,
1457 GLint accum_green_size
,
1458 GLint accum_blue_size
,
1459 GLint accum_alpha_size
,
1462 GLint visualCaveat
)
1466 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
1468 /* For debugging only */
1469 if (getenv("MESA_XSYNC")) {
1470 /* This makes debugging X easier.
1471 * In your debugger, set a breakpoint on _XError to stop when an
1472 * X protocol error is generated.
1474 #ifdef XFree86Server
1477 XSynchronize( display
, 1 );
1481 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
1487 * In the X server, NULL is passed in for the display. It will have
1488 * to be set before using this visual. See XMesaSetVisualDisplay()
1491 v
->display
= display
;
1493 /* Save a copy of the XVisualInfo struct because the user may XFREE()
1494 * the struct but we may need some of the information contained in it
1497 #ifdef XFree86Server
1498 v
->visinfo
= visinfo
;
1500 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
1505 MEMCPY(v
->visinfo
, visinfo
, sizeof(*visinfo
));
1507 /* Save a copy of the pointer now so we can find this visual again
1508 * if we need to search for it in find_glx_visual().
1510 v
->vishandle
= visinfo
;
1513 #ifdef XFree86Server
1514 /* Initialize the depth of the screen */
1516 PixmapFormatRec
*format
;
1518 for (format
= screenInfo
.formats
;
1519 format
->depth
!= display
->rootDepth
;
1522 v
->screen_depth
= format
->bitsPerPixel
;
1526 /* check for MESA_GAMMA environment variable */
1527 gamma
= getenv("MESA_GAMMA");
1529 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 0.0;
1530 sscanf( gamma
, "%f %f %f", &v
->RedGamma
, &v
->GreenGamma
, &v
->BlueGamma
);
1531 if (v
->RedGamma
<=0.0) v
->RedGamma
= 1.0;
1532 if (v
->GreenGamma
<=0.0) v
->GreenGamma
= v
->RedGamma
;
1533 if (v
->BlueGamma
<=0.0) v
->BlueGamma
= v
->RedGamma
;
1536 v
->RedGamma
= v
->GreenGamma
= v
->BlueGamma
= 1.0;
1539 v
->ximage_flag
= ximage_flag
;
1541 v
->VisualCaveat
= visualCaveat
;
1543 (void) initialize_visual_and_buffer( 0, v
, NULL
, rgb_flag
, 0, 0 );
1547 xclass
= GET_VISUAL_CLASS(v
);
1548 if (xclass
==TrueColor
|| xclass
==DirectColor
) {
1549 red_bits
= bitcount(GET_REDMASK(v
));
1550 green_bits
= bitcount(GET_GREENMASK(v
));
1551 blue_bits
= bitcount(GET_BLUEMASK(v
));
1555 /* this is an approximation */
1557 depth
= GET_VISUAL_DEPTH(v
);
1558 red_bits
= depth
/ 3;
1560 green_bits
= depth
/ 2;
1561 depth
-= green_bits
;
1564 assert( red_bits
+ green_bits
+ blue_bits
== GET_VISUAL_DEPTH(v
) );
1568 if (alpha_flag
&& alpha_bits
== 0)
1571 v
->gl_visual
= _mesa_create_visual( rgb_flag
, db_flag
, stereo_flag
,
1572 red_bits
, green_bits
,
1573 blue_bits
, alpha_bits
,
1577 accum_red_size
, accum_green_size
,
1578 accum_blue_size
, accum_alpha_size
,
1580 if (!v
->gl_visual
) {
1581 #ifndef XFree86Server
1592 void XMesaSetVisualDisplay( XMesaDisplay
*dpy
, XMesaVisual v
)
1598 void XMesaDestroyVisual( XMesaVisual v
)
1600 _mesa_destroy_visual( v
->gl_visual
);
1601 #ifndef XFree86Server
1610 * Create a new XMesaContext.
1611 * Input: v - XMesaVisual
1612 * share_list - another XMesaContext with which to share display
1613 * lists or NULL if no sharing is wanted.
1614 * Return: an XMesaContext or NULL if error.
1616 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
1620 GLboolean direct
= GL_TRUE
; /* XXXX */
1621 /* NOT_DONE: should this be GL_FALSE??? */
1622 static GLboolean firstTime
= GL_TRUE
;
1625 _glthread_INIT_MUTEX(_xmesa_lock
);
1626 firstTime
= GL_FALSE
;
1629 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
1634 ctx
= c
->gl_ctx
= _mesa_create_context( v
->gl_visual
,
1635 share_list
? share_list
->gl_ctx
: (GLcontext
*) NULL
,
1636 (void *) c
, direct
);
1642 _mesa_enable_sw_extensions(ctx
);
1644 if (CHECK_BYTE_ORDER(v
)) {
1645 c
->swapbytes
= GL_FALSE
;
1648 c
->swapbytes
= GL_TRUE
;
1652 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
1653 c
->display
= v
->display
;
1654 c
->pixelformat
= v
->dithered_pf
; /* Dithering is enabled by default */
1656 ctx
->Driver
.UpdateState
= xmesa_update_state
;
1658 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
1659 c
->driContextPriv
= driContextPriv
;
1662 /* Set up some constant pointers:
1664 xmesa_init_pointers( ctx
);
1666 /* Initialize the software rasterizer and helper modules.
1668 _swrast_CreateContext( ctx
);
1669 _ac_CreateContext( ctx
);
1670 _tnl_CreateContext( ctx
);
1671 _swsetup_CreateContext( ctx
);
1673 xmesa_register_swrast_functions( ctx
);
1675 /* Run the config file
1677 _mesa_context_initialize( ctx
);
1686 void XMesaDestroyContext( XMesaContext c
)
1689 if (c
->xm_buffer
&& c
->xm_buffer
->FXctx
)
1690 fxMesaDestroyContext(c
->xm_buffer
->FXctx
);
1693 _swsetup_DestroyContext( c
->gl_ctx
);
1694 _swrast_DestroyContext( c
->gl_ctx
);
1695 _mesa_destroy_context( c
->gl_ctx
);
1698 /* Disassociate old buffer with this context */
1700 c
->xm_buffer
->xm_context
= NULL
;
1702 /* Destroy any buffers which are using this context. If we don't
1703 * we may have dangling references. Hmm, maybe we should just
1704 * set the buffer's context pointer to NULL instead of deleting it?
1705 * Let's see if we get any bug reports...
1706 * This contributed by Doug Rabson <dfr@calcaphon.com>
1709 XMesaBuffer b
, next
;
1710 for (b
= XMesaBufferList
; b
; b
= next
) {
1712 if (!b
->pixmap_flag
) {
1713 #ifndef XFree86Server
1714 XSync(b
->display
, False
);
1716 if (b
->xm_context
== c
) {
1717 /* found a context created for this context */
1718 XMesaDestroyBuffer( b
);
1730 * XXX this isn't a public function! It's a hack for the 3Dfx driver.
1731 * Create a new XMesaBuffer from an X window.
1732 * Input: v - the XMesaVisual
1735 * Return: new XMesaBuffer or NULL if error
1737 XMesaBuffer
XMesaCreateWindowBuffer2( XMesaVisual v
, XMesaWindow w
,
1740 #ifndef XFree86Server
1741 XWindowAttributes attr
;
1748 XMesaBuffer b
= alloc_xmesa_buffer();
1755 #ifdef XFree86Server
1756 client
= CLIENT_ID(((XMesaDrawable
)w
)->id
);
1761 #ifdef XFree86Server
1762 if (GET_VISUAL_DEPTH(v
) != ((XMesaDrawable
)w
)->depth
) {
1764 XGetWindowAttributes( v
->display
, w
, &attr
);
1766 if (GET_VISUAL_DEPTH(v
) != attr
.depth
) {
1768 if (getenv("MESA_DEBUG")) {
1769 fprintf(stderr
, "XMesaCreateWindowBuffer: depth mismatch between visual and window!\n");
1774 b
->xm_context
= NULL
; /* Associate no context with this buffer */
1777 b
->pixmap_flag
= GL_FALSE
;
1778 b
->display
= v
->display
;
1779 #ifdef XFree86Server
1780 b
->cmap
= (ColormapPtr
)LookupIDByType(wColormap(w
), RT_COLORMAP
);
1782 if (attr
.colormap
) {
1783 b
->cmap
= attr
.colormap
;
1786 if (getenv("MESA_DEBUG")) {
1787 fprintf(stderr
, "Window %u has no colormap!\n", (unsigned int) w
);
1789 /* this is weird, a window w/out a colormap!? */
1790 /* OK, let's just allocate a new one and hope for the best */
1791 b
->cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
1795 /* determine back buffer implementation */
1796 if (v
->gl_visual
->doubleBufferMode
) {
1797 if (v
->ximage_flag
) {
1798 b
->db_state
= BACK_XIMAGE
;
1801 b
->db_state
= BACK_PIXMAP
;
1808 b
->gl_buffer
= _mesa_create_framebuffer( v
->gl_visual
,
1809 v
->gl_visual
->depthBits
> 0,
1810 v
->gl_visual
->stencilBits
> 0,
1811 v
->gl_visual
->accumRedBits
> 0,
1812 v
->gl_visual
->alphaBits
> 0 );
1813 if (!b
->gl_buffer
) {
1814 free_xmesa_buffer(client
, b
);
1818 if (!initialize_visual_and_buffer( client
, v
, b
, v
->gl_visual
->rgbMode
,
1819 (XMesaDrawable
)w
, b
->cmap
)) {
1820 _mesa_destroy_framebuffer( b
->gl_buffer
);
1821 free_xmesa_buffer(client
, b
);
1826 fxEnvVar
= getenv("MESA_GLX_FX");
1828 if (fxEnvVar
[0]!='d') {
1832 if (v
->gl_visual
->depthBits
> 0) {
1833 attribs
[numAttribs
++] = FXMESA_DEPTH_SIZE
;
1834 attribs
[numAttribs
++] = 1;
1836 if (v
->gl_visual
->doubleBufferMode
) {
1837 attribs
[numAttribs
++] = FXMESA_DOUBLEBUFFER
;
1839 if (v
->gl_visual
->accumRedBits
> 0) {
1840 attribs
[numAttribs
++] = FXMESA_ACCUM_SIZE
;
1841 attribs
[numAttribs
++] = v
->gl_visual
->accumRedBits
;
1843 if (v
->gl_visual
->stencilBits
> 0) {
1844 attribs
[numAttribs
++] = FXMESA_STENCIL_SIZE
;
1845 attribs
[numAttribs
++] = v
->gl_visual
->stencilBits
;
1847 if (v
->gl_visual
->alphaBits
> 0) {
1848 attribs
[numAttribs
++] = FXMESA_ALPHA_SIZE
;
1849 attribs
[numAttribs
++] = 1;
1852 #define FXMESA_SHARE_CONTEXT 990099 /* keep in sync with fxapi.c! */
1853 attribs
[numAttribs
++] = FXMESA_SHARE_CONTEXT
;
1854 attribs
[numAttribs
++] = (int) c
->gl_ctx
;
1856 attribs
[numAttribs
++] = FXMESA_NONE
;
1858 if ((hw
= fxQueryHardware())==GR_SSTTYPE_VOODOO
) {
1859 b
->FXctx
= fxMesaCreateBestContext(0, b
->width
, b
->height
, attribs
);
1860 if ((v
->undithered_pf
!=PF_INDEX
) && (b
->backimage
)) {
1861 b
->FXisHackUsable
= b
->FXctx
? GL_TRUE
: GL_FALSE
;
1862 if (fxEnvVar
[0]=='w' || fxEnvVar
[0]=='W')
1863 b
->FXwindowHack
= b
->FXctx
? GL_TRUE
: GL_FALSE
;
1865 b
->FXwindowHack
= GL_FALSE
;
1869 if (fxEnvVar
[0]=='w' || fxEnvVar
[0]=='W')
1870 b
->FXctx
= fxMesaCreateContext(w
, GR_RESOLUTION_NONE
,
1871 GR_REFRESH_75Hz
, attribs
);
1873 b
->FXctx
= fxMesaCreateBestContext(0, b
->width
, b
->height
, attribs
);
1874 b
->FXisHackUsable
= GL_FALSE
;
1875 b
->FXwindowHack
= GL_FALSE
;
1879 "voodoo %d, wid %d height %d hack: usable %d active %d\n",
1880 hw, b->width, b->height, b->FXisHackUsable, b->FXwindowHack);
1885 fprintf(stderr
,"WARNING: This Mesa Library includes the Glide driver but\n");
1886 fprintf(stderr
," you have not defined the MESA_GLX_FX env. var.\n");
1887 fprintf(stderr
," (check the README.3DFX file for more information).\n\n");
1888 fprintf(stderr
," you can disable this message with a 'export MESA_GLX_FX=disable'.\n");
1892 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
1893 b
->driDrawPriv
= driDrawPriv
;
1900 XMesaBuffer
XMesaCreateWindowBuffer( XMesaVisual v
, XMesaWindow w
)
1902 return XMesaCreateWindowBuffer2( v
, w
, NULL
);
1907 * Create a new XMesaBuffer from an X pixmap.
1908 * Input: v - the XMesaVisual
1910 * cmap - the colormap, may be 0 if using a TrueColor or DirectColor
1911 * visual for the pixmap
1912 * Return: new XMesaBuffer or NULL if error
1914 XMesaBuffer
XMesaCreatePixmapBuffer( XMesaVisual v
,
1915 XMesaPixmap p
, XMesaColormap cmap
)
1918 XMesaBuffer b
= alloc_xmesa_buffer();
1924 #ifdef XFree86Server
1925 client
= CLIENT_ID(((XMesaDrawable
)p
)->id
);
1930 b
->xm_context
= NULL
; /* Associate no context with this buffer */
1933 b
->pixmap_flag
= GL_TRUE
;
1934 b
->display
= v
->display
;
1937 /* determine back buffer implementation */
1938 if (v
->gl_visual
->doubleBufferMode
) {
1939 if (v
->ximage_flag
) {
1940 b
->db_state
= BACK_XIMAGE
;
1943 b
->db_state
= BACK_PIXMAP
;
1950 b
->gl_buffer
= _mesa_create_framebuffer( v
->gl_visual
,
1951 v
->gl_visual
->depthBits
> 0,
1952 v
->gl_visual
->stencilBits
> 0,
1953 v
->gl_visual
->accumRedBits
+
1954 v
->gl_visual
->accumGreenBits
+
1955 v
->gl_visual
->accumBlueBits
> 0,
1956 v
->gl_visual
->alphaBits
> 0 );
1957 if (!b
->gl_buffer
) {
1958 free_xmesa_buffer(client
, b
);
1962 if (!initialize_visual_and_buffer(client
, v
, b
, v
->gl_visual
->rgbMode
,
1963 (XMesaDrawable
)p
, cmap
)) {
1964 _mesa_destroy_framebuffer( b
->gl_buffer
);
1965 free_xmesa_buffer(client
, b
);
1969 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
1970 b
->driDrawPriv
= driDrawPriv
;
1979 * Deallocate an XMesaBuffer structure and all related info.
1981 void XMesaDestroyBuffer( XMesaBuffer b
)
1985 #ifdef XFree86Server
1987 client
= CLIENT_ID(b
->frontbuffer
->id
);
1990 if (b
->gc
) XMesaFreeGC( b
->xm_visual
->display
, b
->gc
);
1991 if (b
->cleargc
) XMesaFreeGC( b
->xm_visual
->display
, b
->cleargc
);
1994 #if defined(USE_XSHM) && !defined(XFree86Server)
1996 XShmDetach( b
->xm_visual
->display
, &b
->shminfo
);
1997 XDestroyImage( b
->backimage
);
1998 shmdt( b
->shminfo
.shmaddr
);
2002 XMesaDestroyImage( b
->backimage
);
2004 if (b
->backpixmap
) {
2005 XMesaFreePixmap( b
->xm_visual
->display
, b
->backpixmap
);
2006 if (b
->xm_visual
->hpcr_clear_flag
) {
2007 XMesaFreePixmap( b
->xm_visual
->display
,
2008 b
->xm_visual
->hpcr_clear_pixmap
);
2009 XMesaDestroyImage( b
->xm_visual
->hpcr_clear_ximage
);
2013 FREE( b
->rowimage
->data
);
2014 b
->rowimage
->data
= NULL
;
2015 XMesaDestroyImage( b
->rowimage
);
2019 b
->xm_context
->xm_buffer
= NULL
;
2021 _mesa_destroy_framebuffer( b
->gl_buffer
);
2022 free_xmesa_buffer(client
, b
);
2028 * Bind buffer b to context c and make c the current rendering context.
2030 GLboolean
XMesaMakeCurrent( XMesaContext c
, XMesaBuffer b
)
2032 return XMesaMakeCurrent2( c
, b
, b
);
2037 * Bind buffer b to context c and make c the current rendering context.
2039 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
2040 XMesaBuffer readBuffer
)
2043 if (!drawBuffer
|| !readBuffer
)
2044 return GL_FALSE
; /* must specify buffers! */
2047 if (drawBuffer
->FXctx
) {
2048 fxMesaMakeCurrent(drawBuffer
->FXctx
);
2050 /* Disassociate old buffer from this context */
2052 c
->xm_buffer
->xm_context
= NULL
;
2054 /* Associate the context with this buffer */
2055 drawBuffer
->xm_context
= c
;
2057 c
->xm_buffer
= drawBuffer
;
2058 c
->xm_read_buffer
= readBuffer
;
2059 c
->use_read_buffer
= (drawBuffer
!= readBuffer
);
2064 if (c
->gl_ctx
== _mesa_get_current_context()
2065 && c
->xm_buffer
== drawBuffer
2066 && c
->xm_read_buffer
== readBuffer
2067 && c
->xm_buffer
->wasCurrent
) {
2068 /* same context and buffer, do nothing */
2072 /* Disassociate old buffer with this context */
2074 c
->xm_buffer
->xm_context
= NULL
;
2075 drawBuffer
->xm_context
= c
; /* Associate the context with this buffer */
2077 c
->xm_buffer
= drawBuffer
;
2078 c
->xm_read_buffer
= readBuffer
;
2079 c
->use_read_buffer
= (drawBuffer
!= readBuffer
);
2081 _mesa_make_current2(c
->gl_ctx
, drawBuffer
->gl_buffer
, readBuffer
->gl_buffer
);
2083 if (c
->gl_ctx
->Viewport
.Width
== 0) {
2084 /* initialize viewport to window size */
2085 _mesa_Viewport( 0, 0, drawBuffer
->width
, drawBuffer
->height
);
2086 c
->gl_ctx
->Scissor
.Width
= drawBuffer
->width
;
2087 c
->gl_ctx
->Scissor
.Height
= drawBuffer
->height
;
2090 if (c
->xm_visual
->gl_visual
->rgbMode
) {
2092 * Must recompute and set these pixel values because colormap
2093 * can be different for different windows.
2095 c
->clearpixel
= xmesa_color_to_pixel( c
,
2100 c
->xm_visual
->undithered_pf
);
2101 XMesaSetForeground(c
->display
, c
->xm_buffer
->cleargc
, c
->clearpixel
);
2104 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
2105 c
->xm_buffer
->wasCurrent
= GL_TRUE
;
2109 _mesa_make_current2( NULL
, NULL
, NULL
);
2116 * Unbind the context c from its buffer.
2118 GLboolean
XMesaUnbindContext( XMesaContext c
)
2120 /* A no-op for XFree86 integration purposes */
2125 XMesaContext
XMesaGetCurrentContext( void )
2127 GET_CURRENT_CONTEXT(ctx
);
2129 XMesaContext xmesa
= (XMesaContext
) ctx
->DriverCtx
;
2138 XMesaBuffer
XMesaGetCurrentBuffer( void )
2140 GET_CURRENT_CONTEXT(ctx
);
2142 XMesaContext xmesa
= (XMesaContext
) ctx
->DriverCtx
;
2143 return xmesa
->xm_buffer
;
2151 /* New in Mesa 3.1 */
2152 XMesaBuffer
XMesaGetCurrentReadBuffer( void )
2154 GET_CURRENT_CONTEXT(ctx
);
2156 XMesaContext xmesa
= (XMesaContext
) ctx
->DriverCtx
;
2157 return xmesa
->xm_buffer
;
2165 GLboolean
XMesaForceCurrent(XMesaContext c
)
2168 if (c
->gl_ctx
!= _mesa_get_current_context()) {
2169 _mesa_make_current(c
->gl_ctx
, c
->xm_buffer
->gl_buffer
);
2173 _mesa_make_current(NULL
, NULL
);
2179 GLboolean
XMesaLoseCurrent(XMesaContext c
)
2182 _mesa_make_current(NULL
, NULL
);
2188 * Switch 3Dfx support hack between window and full-screen mode.
2190 GLboolean
XMesaSetFXmode( GLint mode
)
2193 const char *fx
= getenv("MESA_GLX_FX");
2194 if (fx
&& fx
[0] != 'd') {
2195 GET_CURRENT_CONTEXT(ctx
);
2196 GrHwConfiguration hw
;
2197 if (!FX_grSstQueryHardware(&hw
)) {
2198 /*fprintf(stderr, "!grSstQueryHardware\n");*/
2201 if (hw
.num_sst
< 1) {
2202 /*fprintf(stderr, "hw.num_sst < 1\n");*/
2206 XMesaContext xmesa
= (XMesaContext
) ctx
->DriverCtx
;
2207 if (mode
== XMESA_FX_WINDOW
) {
2208 if (xmesa
->xm_buffer
->FXisHackUsable
) {
2209 FX_grSstControl(GR_CONTROL_DEACTIVATE
);
2210 xmesa
->xm_buffer
->FXwindowHack
= GL_TRUE
;
2214 else if (mode
== XMESA_FX_FULLSCREEN
) {
2215 FX_grSstControl(GR_CONTROL_ACTIVATE
);
2216 xmesa
->xm_buffer
->FXwindowHack
= GL_FALSE
;
2220 /* Error: Bad mode value */
2224 /*fprintf(stderr, "fallthrough\n");*/
2235 * Read image from VooDoo frame buffer into X/Mesa's back XImage.
2237 static void FXgetImage( XMesaBuffer b
)
2239 static unsigned short pixbuf
[MAX_WIDTH
];
2242 unsigned int bw
, depth
, width
, height
;
2243 XMesaContext xmesa
= (XMesaContext
) b
->xm_context
->gl_ctx
->DriverCtx
;
2245 assert(xmesa
->xm_buffer
->FXctx
);
2247 #ifdef XFree86Server
2248 x
= b
->frontbuffer
->x
;
2249 y
= b
->frontbuffer
->y
;
2250 width
= b
->frontbuffer
->width
;
2251 height
= b
->frontbuffer
->height
;
2252 depth
= b
->frontbuffer
->depth
;
2254 XGetGeometry( xmesa
->xm_visual
->display
, b
->frontbuffer
,
2255 &root
, &x
, &y
, &width
, &height
, &bw
, &depth
);
2257 if (b
->width
!= width
|| b
->height
!= height
) {
2258 b
->width
= MIN2((int)width
, xmesa
->xm_buffer
->FXctx
->width
);
2259 b
->height
= MIN2((int)height
, xmesa
->xm_buffer
->FXctx
->height
);
2261 b
->width
--; /* prevent odd width */
2262 xmesa_alloc_back_buffer( b
);
2265 grLfbWriteColorFormat(GR_COLORFORMAT_ARGB
);
2266 if (xmesa
->xm_visual
->undithered_pf
==PF_5R6G5B
) {
2267 /* Special case: 16bpp RGB */
2268 grLfbReadRegion( GR_BUFFER_FRONTBUFFER
, /* src buffer */
2269 0, xmesa
->xm_buffer
->FXctx
->height
- b
->height
, /*pos*/
2270 b
->width
, b
->height
, /* size */
2271 b
->width
* sizeof(GLushort
), /* stride */
2272 b
->backimage
->data
); /* dest buffer */
2274 else if (xmesa
->xm_visual
->dithered_pf
==PF_DITHER
2275 && GET_VISUAL_DEPTH(xmesa
->xm_visual
)==8) {
2276 /* Special case: 8bpp RGB */
2277 for (y
=0;y
<b
->height
;y
++) {
2278 GLubyte
*ptr
= (GLubyte
*) xmesa
->xm_buffer
->backimage
->data
2279 + xmesa
->xm_buffer
->backimage
->bytes_per_line
* y
;
2282 /* read row from 3Dfx frame buffer */
2283 grLfbReadRegion( GR_BUFFER_FRONTBUFFER
,
2284 0, xmesa
->xm_buffer
->FXctx
->height
-(b
->height
-y
),
2289 /* write to XImage back buffer */
2290 for (x
=0;x
<b
->width
;x
++) {
2291 GLubyte r
= (pixbuf
[x
] & 0xf800) >> 8;
2292 GLubyte g
= (pixbuf
[x
] & 0x07e0) >> 3;
2293 GLubyte b
= (pixbuf
[x
] & 0x001f) << 3;
2294 *ptr
++ = XDITHER( x
, r
, g
, b
);
2299 /* General case: slow! */
2300 for (y
=0;y
<b
->height
;y
++) {
2301 /* read row from 3Dfx frame buffer */
2302 grLfbReadRegion( GR_BUFFER_FRONTBUFFER
,
2303 0, xmesa
->xm_buffer
->FXctx
->height
-(b
->height
-y
),
2308 /* write to XImage back buffer */
2309 for (x
=0;x
<b
->width
;x
++) {
2310 XMesaPutPixel(b
->backimage
,x
,y
,
2311 xmesa_color_to_pixel(xmesa
,
2312 (pixbuf
[x
] & 0xf800) >> 8,
2313 (pixbuf
[x
] & 0x07e0) >> 3,
2314 (pixbuf
[x
] & 0x001f) << 3,
2315 0xff, xmesa
->pixelformat
));
2319 grLfbWriteColorFormat(GR_COLORFORMAT_ABGR
);
2325 * Copy the back buffer to the front buffer. If there's no back buffer
2328 void XMesaSwapBuffers( XMesaBuffer b
)
2330 GET_CURRENT_CONTEXT(ctx
);
2332 /* If we're swapping the buffer associated with the current context
2333 * we have to flush any pending rendering commands first.
2335 if (b
->xm_context
&& b
->xm_context
->gl_ctx
== ctx
)
2336 _mesa_swapbuffers(ctx
);
2341 fxMesaSwapBuffers();
2343 if (b
->FXwindowHack
)
2350 /* Copy Ximage from host's memory to server's window */
2351 #if defined(USE_XSHM) && !defined(XFree86Server)
2353 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2354 XShmPutImage( b
->xm_visual
->display
, b
->frontbuffer
,
2357 0, 0, b
->width
, b
->height
, False
);
2358 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2363 #if defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
2364 XMesaDriSwapBuffers( b
);
2366 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2367 XMesaPutImage( b
->xm_visual
->display
, b
->frontbuffer
,
2370 0, 0, b
->width
, b
->height
);
2371 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2376 /* Copy pixmap to window on server */
2377 /*_glthread_LOCK_MUTEX(_xmesa_lock);*/
2378 XMesaCopyArea( b
->xm_visual
->display
,
2379 b
->backpixmap
, /* source drawable */
2380 b
->frontbuffer
, /* dest. drawable */
2382 0, 0, b
->width
, b
->height
, /* source region */
2383 0, 0 /* dest region */
2385 /*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
2388 #if !defined(GLX_DIRECT_RENDERING) && !defined(XFree86Server)
2389 XSync( b
->xm_visual
->display
, False
);
2396 * Copy sub-region of back buffer to front buffer
2398 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
2400 GET_CURRENT_CONTEXT(ctx
);
2402 /* If we're swapping the buffer associated with the current context
2403 * we have to flush any pending rendering commands first.
2405 if (b
->xm_context
->gl_ctx
== ctx
)
2406 _mesa_swapbuffers(ctx
);
2409 int yTop
= b
->height
- y
- height
;
2412 fxMesaSwapBuffers();
2413 if (b
->FXwindowHack
)
2420 /* Copy Ximage from host's memory to server's window */
2421 #if defined(USE_XSHM) && !defined(XFree86Server)
2423 /* XXX assuming width and height aren't too large! */
2424 XShmPutImage( b
->xm_visual
->display
, b
->frontbuffer
,
2426 b
->backimage
, x
, yTop
,
2427 x
, yTop
, width
, height
, False
);
2428 /* wait for finished event??? */
2433 /* XXX assuming width and height aren't too large! */
2434 XMesaPutImage( b
->xm_visual
->display
, b
->frontbuffer
,
2436 b
->backimage
, x
, yTop
,
2437 x
, yTop
, width
, height
);
2441 /* Copy pixmap to window on server */
2442 XMesaCopyArea( b
->xm_visual
->display
,
2443 b
->backpixmap
, /* source drawable */
2444 b
->frontbuffer
, /* dest. drawable */
2446 x
, yTop
, width
, height
, /* source region */
2447 x
, yTop
/* dest region */
2455 * Return a pointer to the XMesa backbuffer Pixmap or XImage. This function
2456 * is a way to get "under the hood" of X/Mesa so one can manipulate the
2457 * back buffer directly.
2458 * Output: pixmap - pointer to back buffer's Pixmap, or 0
2459 * ximage - pointer to back buffer's XImage, or NULL
2460 * Return: GL_TRUE = context is double buffered
2461 * GL_FALSE = context is single buffered
2463 GLboolean
XMesaGetBackBuffer( XMesaBuffer b
,
2464 XMesaPixmap
*pixmap
,
2465 XMesaImage
**ximage
)
2468 if (pixmap
) *pixmap
= b
->backpixmap
;
2469 if (ximage
) *ximage
= b
->backimage
;
2481 * Return the depth buffer associated with an XMesaBuffer.
2482 * Input: b - the XMesa buffer handle
2483 * Output: width, height - size of buffer in pixels
2484 * bytesPerValue - bytes per depth value (2 or 4)
2485 * buffer - pointer to depth buffer values
2486 * Return: GL_TRUE or GL_FALSE to indicate success or failure.
2488 GLboolean
XMesaGetDepthBuffer( XMesaBuffer b
, GLint
*width
, GLint
*height
,
2489 GLint
*bytesPerValue
, void **buffer
)
2491 if ((!b
->gl_buffer
) || (!b
->gl_buffer
->DepthBuffer
)) {
2499 *width
= b
->gl_buffer
->Width
;
2500 *height
= b
->gl_buffer
->Height
;
2501 *bytesPerValue
= sizeof(GLdepth
);
2502 *buffer
= b
->gl_buffer
->DepthBuffer
;
2508 void XMesaFlush( XMesaContext c
)
2510 if (c
&& c
->xm_visual
) {
2511 #ifdef XFree86Server
2514 XSync( c
->xm_visual
->display
, False
);
2521 const char *XMesaGetString( XMesaContext c
, int name
)
2524 if (name
==XMESA_VERSION
) {
2527 else if (name
==XMESA_EXTENSIONS
) {
2537 XMesaBuffer
XMesaFindBuffer( XMesaDisplay
*dpy
, XMesaDrawable d
)
2540 for (b
=XMesaBufferList
; b
; b
=b
->Next
) {
2541 if (b
->frontbuffer
==d
&& b
->display
==dpy
) {
2551 * Look for XMesaBuffers whose X window has been destroyed.
2552 * Deallocate any such XMesaBuffers.
2554 void XMesaGarbageCollect( void )
2556 XMesaBuffer b
, next
;
2557 for (b
=XMesaBufferList
; b
; b
=next
) {
2559 if (!b
->pixmap_flag
) {
2560 #ifdef XFree86Server
2563 XSync(b
->display
, False
);
2564 if (!window_exists( b
->display
, b
->frontbuffer
)) {
2565 /* found a dead window, free the ancillary info */
2566 XMesaDestroyBuffer( b
);
2574 void XMesaReset( void )
2576 while (XMesaBufferList
)
2577 XMesaDestroyBuffer(XMesaBufferList
);
2579 XMesaBufferList
= NULL
;
2583 unsigned long XMesaDitherColor( XMesaContext xmesa
, GLint x
, GLint y
,
2584 GLfloat red
, GLfloat green
,
2585 GLfloat blue
, GLfloat alpha
)
2587 GLint r
= (GLint
) (red
* 255.0F
);
2588 GLint g
= (GLint
) (green
* 255.0F
);
2589 GLint b
= (GLint
) (blue
* 255.0F
);
2590 GLint a
= (GLint
) (alpha
* 255.0F
);
2592 switch (xmesa
->pixelformat
) {
2598 PACK_TRUECOLOR( p
, r
, g
, b
);
2602 return PACK_8A8B8G8R( r
, g
, b
, a
);
2604 return PACK_8R8G8B( r
, g
, b
);
2606 return PACK_5R6G5B( r
, g
, b
);
2610 return DITHER( x
, y
, r
, g
, b
);
2613 /* 382 = (3*255)/2 */
2614 return ((r
+g
+b
) > 382) ^ xmesa
->xm_visual
->bitFlip
;
2616 return DITHER_HPCR(x
, y
, r
, g
, b
);
2620 return LOOKUP( r
, g
, b
);
2623 return GRAY_RGB( r
, g
, b
);
2624 case PF_DITHER_5R6G5B
:
2629 PACK_TRUEDITHER(p
, x
, y
, r
, g
, b
);
2633 _mesa_problem(NULL
, "Bad pixel format in XMesaDitherColor");