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.
39 * Byte swapping: If the Mesa host and the X display use a different
40 * byte order then there's some trickiness to be aware of when using
41 * XImages. The byte ordering used for the XImage is that of the X
42 * display, not the Mesa host.
43 * The color-to-pixel encoding for True/DirectColor must be done
44 * according to the display's visual red_mask, green_mask, and blue_mask.
45 * If XPutPixel is used to put a pixel into an XImage then XPutPixel will
46 * do byte swapping if needed. If one wants to directly "poke" the pixel
47 * into the XImage's buffer then the pixel must be byte swapped first.
59 #include "main/context.h"
60 #include "pipe/p_defines.h"
61 #include "pipe/p_screen.h"
62 #include "pipe/p_context.h"
64 #include "xm_public.h"
68 /* Driver interface routines, set up by xlib backend on library
69 * _init(). These are global in the same way that function names are
72 static struct xm_driver driver;
73 static struct st_api *stapi;
75 void xmesa_set_driver( const struct xm_driver *templ )
78 stapi = driver.create_st_api();
83 * XXX replace this with a linked list, or better yet, try to attach the
84 * gallium/mesa extra bits to the X Display object with XAddExtension().
86 #define MAX_DISPLAYS 10
87 static struct xmesa_display Displays[MAX_DISPLAYS];
88 static int NumDisplays = 0;
92 xmesa_init_display( Display *display )
94 pipe_static_mutex(init_mutex);
98 pipe_mutex_lock(init_mutex);
100 /* Look for XMesaDisplay which corresponds to 'display' */
101 for (i = 0; i < NumDisplays; i++) {
102 if (Displays[i].display == display) {
104 pipe_mutex_unlock(init_mutex);
109 /* Create new XMesaDisplay */
111 assert(NumDisplays < MAX_DISPLAYS);
112 xmdpy = &Displays[NumDisplays];
115 if (!xmdpy->display && display) {
116 xmdpy->display = display;
117 xmdpy->screen = driver.create_pipe_screen(display);
118 xmdpy->smapi = CALLOC_STRUCT(st_manager);
120 xmdpy->smapi->screen = xmdpy->screen;
122 if (xmdpy->screen && xmdpy->smapi) {
123 pipe_mutex_init(xmdpy->mutex);
127 xmdpy->screen->destroy(xmdpy->screen);
128 xmdpy->screen = NULL;
135 xmdpy->display = NULL;
138 if (!xmdpy->display || xmdpy->display != display)
141 pipe_mutex_unlock(init_mutex);
146 /**********************************************************************/
147 /***** X Utility Functions *****/
148 /**********************************************************************/
152 * Return the host's byte order as LSBFirst or MSBFirst ala X.
154 static int host_byte_order( void )
157 char *cptr = (char *) &i;
158 return (*cptr==1) ? LSBFirst : MSBFirst;
165 * Return the true number of bits per pixel for XImages.
166 * For example, if we request a 24-bit deep visual we may actually need/get
167 * 32bpp XImages. This function returns the appropriate bpp.
168 * Input: dpy - the X display
169 * visinfo - desribes the visual to be used for XImages
170 * Return: true number of bits per pixel for XImages
173 bits_per_pixel( XMesaVisual xmv )
175 Display *dpy = xmv->display;
176 XVisualInfo * visinfo = xmv->visinfo;
179 /* Create a temporary XImage */
180 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
181 ZPixmap, 0, /*format, offset*/
182 (char*) MALLOC(8), /*data*/
183 1, 1, /*width, height*/
188 /* grab the bits/pixel value */
189 bitsPerPixel = img->bits_per_pixel;
190 /* free the XImage */
193 XDestroyImage( img );
200 * Determine if a given X window ID is valid (window exists).
201 * Do this by calling XGetWindowAttributes() for the window and
202 * checking if we catch an X error.
203 * Input: dpy - the display
204 * win - the window to check for existance
205 * Return: GL_TRUE - window exists
206 * GL_FALSE - window doesn't exist
208 static GLboolean WindowExistsFlag;
210 static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr )
213 if (xerr->error_code == BadWindow) {
214 WindowExistsFlag = GL_FALSE;
219 static GLboolean window_exists( Display *dpy, Window win )
221 XWindowAttributes wa;
222 int (*old_handler)( Display*, XErrorEvent* );
223 WindowExistsFlag = GL_TRUE;
224 old_handler = XSetErrorHandler(window_exists_err_handler);
225 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
226 XSetErrorHandler(old_handler);
227 return WindowExistsFlag;
231 get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height )
236 unsigned int w, h, bw, depth;
237 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
245 * Return the size of the window (or pixmap) that corresponds to the
247 * \param width returns width in pixels
248 * \param height returns height in pixels
251 xmesa_get_window_size(Display *dpy, XMesaBuffer b,
252 GLuint *width, GLuint *height)
254 XMesaDisplay xmdpy = xmesa_init_display(dpy);
257 pipe_mutex_lock(xmdpy->mutex);
258 XSync(b->xm_visual->display, 0); /* added for Chromium */
259 stat = get_drawable_size(dpy, b->ws.drawable, width, height);
260 pipe_mutex_unlock(xmdpy->mutex);
263 /* probably querying a window that's recently been destroyed */
264 _mesa_warning(NULL, "XGetGeometry failed!\n");
265 *width = *height = 1;
269 #define GET_REDMASK(__v) __v->mesa_visual.redMask
270 #define GET_GREENMASK(__v) __v->mesa_visual.greenMask
271 #define GET_BLUEMASK(__v) __v->mesa_visual.blueMask
275 * Choose the pixel format for the given visual.
276 * This will tell the gallium driver how to pack pixel data into
280 choose_pixel_format(XMesaVisual v)
282 boolean native_byte_order = (host_byte_order() ==
283 ImageByteOrder(v->display));
285 if ( GET_REDMASK(v) == 0x0000ff
286 && GET_GREENMASK(v) == 0x00ff00
287 && GET_BLUEMASK(v) == 0xff0000
288 && v->BitsPerPixel == 32) {
289 if (native_byte_order) {
290 /* no byteswapping needed */
291 return PIPE_FORMAT_R8G8B8A8_UNORM;
294 return PIPE_FORMAT_A8B8G8R8_UNORM;
297 else if ( GET_REDMASK(v) == 0xff0000
298 && GET_GREENMASK(v) == 0x00ff00
299 && GET_BLUEMASK(v) == 0x0000ff
300 && v->BitsPerPixel == 32) {
301 if (native_byte_order) {
302 /* no byteswapping needed */
303 return PIPE_FORMAT_B8G8R8A8_UNORM;
306 return PIPE_FORMAT_A8R8G8B8_UNORM;
309 else if ( GET_REDMASK(v) == 0x0000ff00
310 && GET_GREENMASK(v) == 0x00ff0000
311 && GET_BLUEMASK(v) == 0xff000000
312 && v->BitsPerPixel == 32) {
313 if (native_byte_order) {
314 /* no byteswapping needed */
315 return PIPE_FORMAT_A8R8G8B8_UNORM;
318 return PIPE_FORMAT_B8G8R8A8_UNORM;
321 else if ( GET_REDMASK(v) == 0xf800
322 && GET_GREENMASK(v) == 0x07e0
323 && GET_BLUEMASK(v) == 0x001f
325 && v->BitsPerPixel == 16) {
327 return PIPE_FORMAT_B5G6R5_UNORM;
330 return PIPE_FORMAT_NONE;
335 * Choose a depth/stencil format that satisfies the given depth and
338 static enum pipe_format
339 choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil)
341 const enum pipe_texture_target target = PIPE_TEXTURE_2D;
342 const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL;
343 const unsigned geom_flags = (PIPE_TEXTURE_GEOM_NON_SQUARE |
344 PIPE_TEXTURE_GEOM_NON_POWER_OF_TWO);
345 enum pipe_format formats[8], fmt;
350 if (depth <= 16 && stencil == 0) {
351 formats[count++] = PIPE_FORMAT_Z16_UNORM;
353 if (depth <= 24 && stencil == 0) {
354 formats[count++] = PIPE_FORMAT_X8Z24_UNORM;
355 formats[count++] = PIPE_FORMAT_Z24X8_UNORM;
357 if (depth <= 24 && stencil <= 8) {
358 formats[count++] = PIPE_FORMAT_S8_USCALED_Z24_UNORM;
359 formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED;
361 if (depth <= 32 && stencil == 0) {
362 formats[count++] = PIPE_FORMAT_Z32_UNORM;
365 fmt = PIPE_FORMAT_NONE;
366 for (i = 0; i < count; i++) {
367 if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i],
368 target, tex_usage, geom_flags)) {
379 /**********************************************************************/
380 /***** Linked list of XMesaBuffers *****/
381 /**********************************************************************/
383 static XMesaBuffer XMesaBufferList = NULL;
387 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
388 * Note that XMesaBuffer is derived from GLframebuffer.
389 * The new XMesaBuffer will not have any size (Width=Height=0).
391 * \param d the corresponding X drawable (window or pixmap)
392 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
393 * \param vis the buffer's visual
394 * \param cmap the window's colormap, if known.
395 * \return new XMesaBuffer or NULL if any problem
398 create_xmesa_buffer(Drawable d, BufferType type,
399 XMesaVisual vis, Colormap cmap)
401 XMesaDisplay xmdpy = xmesa_init_display(vis->display);
405 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
410 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
415 b->ws.visual = vis->visinfo->visual;
416 b->ws.depth = vis->visinfo->depth;
422 get_drawable_size(vis->display, d, &width, &height);
425 * Create framebuffer, but we'll plug in our own renderbuffers below.
427 b->stfb = xmesa_create_st_framebuffer(xmdpy, b);
429 /* GLX_EXT_texture_from_pixmap */
430 b->TextureTarget = 0;
431 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
432 b->TextureMipmap = 0;
434 /* insert buffer into linked list */
435 b->Next = XMesaBufferList;
443 * Find an XMesaBuffer by matching X display and colormap but NOT matching
444 * the notThis buffer.
447 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis)
450 for (b = XMesaBufferList; b; b = b->Next) {
451 if (b->xm_visual->display == dpy &&
462 * Remove buffer from linked list, delete if no longer referenced.
465 xmesa_free_buffer(XMesaBuffer buffer)
467 XMesaBuffer prev = NULL, b;
469 for (b = XMesaBufferList; b; b = b->Next) {
471 /* unlink buffer from list */
473 prev->Next = buffer->Next;
475 XMesaBufferList = buffer->Next;
477 /* Since the X window for the XMesaBuffer is going away, we don't
478 * want to dereference this pointer in the future.
482 /* XXX we should move the buffer to a delete-pending list and destroy
483 * the buffer until it is no longer current.
485 xmesa_destroy_st_framebuffer(buffer->stfb);
491 /* continue search */
494 /* buffer not found in XMesaBufferList */
495 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
500 /**********************************************************************/
501 /***** Misc Private Functions *****/
502 /**********************************************************************/
506 * When a context is bound for the first time, we can finally finish
507 * initializing the context's visual and buffer information.
508 * \param v the XMesaVisual to initialize
509 * \param b the XMesaBuffer to initialize (may be NULL)
510 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
511 * \param window the window/pixmap we're rendering into
512 * \param cmap the colormap associated with the window/pixmap
513 * \return GL_TRUE=success, GL_FALSE=failure
516 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
517 GLboolean rgb_flag, Drawable window,
520 ASSERT(!b || b->xm_visual == v);
522 /* Save true bits/pixel */
523 v->BitsPerPixel = bits_per_pixel(v);
524 assert(v->BitsPerPixel > 0);
526 if (rgb_flag == GL_FALSE) {
527 /* COLOR-INDEXED WINDOW: not supported*/
532 * We support RGB rendering into almost any kind of visual.
534 const int xclass = v->mesa_visual.visualType;
535 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) {
537 "XMesa: RGB mode rendering not supported in given visual.\n");
540 v->mesa_visual.indexBits = 0;
542 if (v->BitsPerPixel == 32) {
543 /* We use XImages for all front/back buffers. If an X Window or
544 * X Pixmap is 32bpp, there's no guarantee that the alpha channel
545 * will be preserved. For XImages we're in luck.
547 v->mesa_visual.alphaBits = 8;
552 * If MESA_INFO env var is set print out some debugging info
553 * which can help Brian figure out what's going on when a user
556 if (_mesa_getenv("MESA_INFO")) {
557 printf("X/Mesa visual = %p\n", (void *) v);
558 printf("X/Mesa level = %d\n", v->mesa_visual.level);
559 printf("X/Mesa depth = %d\n", v->visinfo->depth);
560 printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
568 #define NUM_VISUAL_TYPES 6
571 * Convert an X visual type to a GLX visual type.
573 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
575 * \return If \c visualType is a valid X visual type, a GLX visual type will
576 * be returned. Otherwise \c GLX_NONE will be returned.
579 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
583 xmesa_convert_from_x_visual_type( int visualType )
585 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
586 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
587 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
588 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
591 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
592 ? glx_visual_types[ visualType ] : GLX_NONE;
596 /**********************************************************************/
597 /***** Public Functions *****/
598 /**********************************************************************/
602 * Create a new X/Mesa visual.
603 * Input: display - X11 display
604 * visinfo - an XVisualInfo pointer
605 * rgb_flag - GL_TRUE = RGB mode,
606 * GL_FALSE = color index mode
607 * alpha_flag - alpha buffer requested?
608 * db_flag - GL_TRUE = double-buffered,
609 * GL_FALSE = single buffered
610 * stereo_flag - stereo visual?
611 * ximage_flag - GL_TRUE = use an XImage for back buffer,
612 * GL_FALSE = use an off-screen pixmap for back buffer
613 * depth_size - requested bits/depth values, or zero
614 * stencil_size - requested bits/stencil values, or zero
615 * accum_red_size - requested bits/red accum values, or zero
616 * accum_green_size - requested bits/green accum values, or zero
617 * accum_blue_size - requested bits/blue accum values, or zero
618 * accum_alpha_size - requested bits/alpha accum values, or zero
619 * num_samples - number of samples/pixel if multisampling, or zero
620 * level - visual level, usually 0
621 * visualCaveat - ala the GLX extension, usually GLX_NONE
622 * Return; a new XMesaVisual or 0 if error.
625 XMesaVisual XMesaCreateVisual( Display *display,
626 XVisualInfo * visinfo,
628 GLboolean alpha_flag,
630 GLboolean stereo_flag,
631 GLboolean ximage_flag,
634 GLint accum_red_size,
635 GLint accum_green_size,
636 GLint accum_blue_size,
637 GLint accum_alpha_size,
642 XMesaDisplay xmdpy = xmesa_init_display(display);
644 GLint red_bits, green_bits, blue_bits, alpha_bits;
649 /* For debugging only */
650 if (_mesa_getenv("MESA_XSYNC")) {
651 /* This makes debugging X easier.
652 * In your debugger, set a breakpoint on _XError to stop when an
653 * X protocol error is generated.
655 XSynchronize( display, 1 );
658 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
663 v->display = display;
665 /* Save a copy of the XVisualInfo struct because the user may Xfree()
666 * the struct but we may need some of the information contained in it
669 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
674 memcpy(v->visinfo, visinfo, sizeof(*visinfo));
676 v->ximage_flag = ximage_flag;
678 v->mesa_visual.redMask = visinfo->red_mask;
679 v->mesa_visual.greenMask = visinfo->green_mask;
680 v->mesa_visual.blueMask = visinfo->blue_mask;
681 v->mesa_visual.visualID = visinfo->visualid;
682 v->mesa_visual.screen = visinfo->screen;
684 #if !(defined(__cplusplus) || defined(c_plusplus))
685 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
687 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
690 v->mesa_visual.visualRating = visualCaveat;
693 v->mesa_visual.alphaBits = 8;
695 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
698 const int xclass = v->mesa_visual.visualType;
699 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
700 red_bits = _mesa_bitcount(GET_REDMASK(v));
701 green_bits = _mesa_bitcount(GET_GREENMASK(v));
702 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
705 /* this is an approximation */
707 depth = v->visinfo->depth;
708 red_bits = depth / 3;
710 green_bits = depth / 2;
714 assert( red_bits + green_bits + blue_bits == v->visinfo->depth );
716 alpha_bits = v->mesa_visual.alphaBits;
719 _mesa_initialize_visual( &v->mesa_visual,
720 db_flag, stereo_flag,
721 red_bits, green_bits,
722 blue_bits, alpha_bits,
725 accum_red_size, accum_green_size,
726 accum_blue_size, accum_alpha_size,
729 v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK;
731 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
733 v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
735 v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
738 v->stvis.color_format = choose_pixel_format(v);
739 if (v->stvis.color_format == PIPE_FORMAT_NONE) {
745 v->stvis.depth_stencil_format =
746 choose_depth_stencil_format(xmdpy, depth_size, stencil_size);
748 v->stvis.accum_format = (accum_red_size +
749 accum_green_size + accum_blue_size + accum_alpha_size) ?
750 PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
752 v->stvis.samples = num_samples;
753 v->stvis.render_buffer = ST_ATTACHMENT_INVALID;
756 v->mesa_visual.level = level;
762 void XMesaDestroyVisual( XMesaVisual v )
770 * Do per-display initializations.
773 xmesa_init( Display *display )
775 xmesa_init_display(display);
780 * Create a new XMesaContext.
781 * \param v the XMesaVisual
782 * \param share_list another XMesaContext with which to share display
783 * lists or NULL if no sharing is wanted.
784 * \return an XMesaContext or NULL if error.
787 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
789 XMesaDisplay xmdpy = xmesa_init_display(v->display);
795 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
796 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
801 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
802 c->xm_read_buffer = NULL;
804 c->st = stapi->create_context(stapi, xmdpy->smapi,
805 &v->stvis, (share_list) ? share_list->st : NULL);
809 c->st->st_manager_private = (void *) c;
815 c->st->destroy(c->st);
824 void XMesaDestroyContext( XMesaContext c )
826 c->st->destroy(c->st);
828 /* FIXME: We should destroy the screen here, but if we do so, surfaces may
829 * outlive it, causing segfaults
830 struct pipe_screen *screen = c->st->pipe->screen;
831 screen->destroy(screen);
840 * Private function for creating an XMesaBuffer which corresponds to an
841 * X window or pixmap.
842 * \param v the window's XMesaVisual
843 * \param w the window we're wrapping
844 * \return new XMesaBuffer or NULL if error
847 XMesaCreateWindowBuffer(XMesaVisual v, Window w)
849 XWindowAttributes attr;
857 /* Check that window depth matches visual depth */
858 XGetWindowAttributes( v->display, w, &attr );
860 if (v->visinfo->depth != depth) {
861 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
862 v->visinfo->depth, depth);
868 cmap = attr.colormap;
871 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
872 /* this is weird, a window w/out a colormap!? */
873 /* OK, let's just allocate a new one and hope for the best */
874 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
877 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap);
881 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
882 (Drawable) w, cmap )) {
883 xmesa_free_buffer(b);
893 * Create a new XMesaBuffer from an X pixmap.
895 * \param v the XMesaVisual
896 * \param p the pixmap
897 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
898 * \c GLX_DIRECT_COLOR visual for the pixmap
899 * \returns new XMesaBuffer or NULL if error
902 XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap)
908 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
912 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
913 (Drawable) p, cmap)) {
914 xmesa_free_buffer(b);
923 * For GLX_EXT_texture_from_pixmap
926 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
928 int format, int target, int mipmap)
930 GET_CURRENT_CONTEXT(ctx);
935 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
939 /* get pixmap size */
940 xmesa_get_window_size(v->display, b, &b->width, &b->height);
944 if (ctx->Extensions.ARB_texture_non_power_of_two) {
945 target = GLX_TEXTURE_2D_EXT;
947 else if ( _mesa_bitcount(b->width) == 1
948 && _mesa_bitcount(b->height) == 1) {
949 /* power of two size */
950 if (b->height == 1) {
951 target = GLX_TEXTURE_1D_EXT;
954 target = GLX_TEXTURE_2D_EXT;
957 else if (ctx->Extensions.NV_texture_rectangle) {
958 target = GLX_TEXTURE_RECTANGLE_EXT;
961 /* non power of two textures not supported */
962 XMesaDestroyBuffer(b);
967 b->TextureTarget = target;
968 b->TextureFormat = format;
969 b->TextureMipmap = mipmap;
971 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
972 (Drawable) p, cmap)) {
973 xmesa_free_buffer(b);
983 XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
984 unsigned int width, unsigned int height)
987 Drawable drawable; /* X Pixmap Drawable */
990 /* allocate pixmap for front buffer */
991 root = RootWindow( v->display, v->visinfo->screen );
992 drawable = XCreatePixmap(v->display, root, width, height,
997 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1001 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1003 xmesa_free_buffer(b);
1013 * Deallocate an XMesaBuffer structure and all related info.
1016 XMesaDestroyBuffer(XMesaBuffer b)
1018 xmesa_free_buffer(b);
1023 * Query the current drawable size and notify the binding context.
1026 xmesa_check_buffer_size(XMesaBuffer b)
1028 XMesaContext xmctx = XMesaGetCurrentContext();
1030 if (b->type == PBUFFER)
1033 xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height);
1034 if (xmctx && xmctx->xm_buffer == b)
1035 xmctx->st->notify_invalid_framebuffer(xmctx->st, b->stfb);
1040 * Bind buffer b to context c and make c the current rendering context.
1043 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1044 XMesaBuffer readBuffer )
1046 XMesaContext old_ctx = XMesaGetCurrentContext();
1048 if (old_ctx && old_ctx != c) {
1049 XMesaFlush(old_ctx);
1050 old_ctx->xm_buffer = NULL;
1051 old_ctx->xm_read_buffer = NULL;
1055 if (!drawBuffer || !readBuffer)
1056 return GL_FALSE; /* must specify buffers! */
1059 c->xm_buffer == drawBuffer &&
1060 c->xm_read_buffer == readBuffer)
1063 xmesa_check_buffer_size(drawBuffer);
1064 if (readBuffer != drawBuffer)
1065 xmesa_check_buffer_size(readBuffer);
1067 c->xm_buffer = drawBuffer;
1068 c->xm_read_buffer = readBuffer;
1070 stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb);
1072 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1073 drawBuffer->wasCurrent = GL_TRUE;
1077 stapi->make_current(stapi, NULL, NULL, NULL);
1085 * Unbind the context c from its buffer.
1087 GLboolean XMesaUnbindContext( XMesaContext c )
1089 /* A no-op for XFree86 integration purposes */
1094 XMesaContext XMesaGetCurrentContext( void )
1096 struct st_context_iface *st = stapi->get_current(stapi);
1097 return (XMesaContext) (st) ? st->st_manager_private : NULL;
1103 * Swap front and back color buffers and have winsys display front buffer.
1104 * If there's no front color buffer no swap actually occurs.
1107 void XMesaSwapBuffers( XMesaBuffer b )
1109 XMesaContext xmctx = XMesaGetCurrentContext();
1111 if (xmctx && xmctx->xm_buffer == b) {
1112 xmctx->st->flush( xmctx->st,
1113 PIPE_FLUSH_RENDER_CACHE |
1114 PIPE_FLUSH_SWAPBUFFERS |
1119 xmesa_swap_st_framebuffer(b->stfb);
1125 * Copy sub-region of back buffer to front buffer
1127 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
1129 xmesa_copy_st_framebuffer(b->stfb,
1130 ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT,
1131 x, y, width, height);
1136 void XMesaFlush( XMesaContext c )
1138 if (c && c->xm_visual->display) {
1139 XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display);
1140 struct pipe_fence_handle *fence = NULL;
1142 c->st->flush(c->st, PIPE_FLUSH_RENDER_CACHE | PIPE_FLUSH_FRAME, &fence);
1144 xmdpy->screen->fence_finish(xmdpy->screen, fence, 0);
1145 xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL);
1147 XSync( c->xm_visual->display, False );
1155 XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d )
1158 for (b = XMesaBufferList; b; b = b->Next) {
1159 if (b->ws.drawable == d && b->xm_visual->display == dpy) {
1168 * Free/destroy all XMesaBuffers associated with given display.
1170 void xmesa_destroy_buffers_on_display(Display *dpy)
1172 XMesaBuffer b, next;
1173 for (b = XMesaBufferList; b; b = next) {
1175 if (b->xm_visual->display == dpy) {
1176 xmesa_free_buffer(b);
1183 * Look for XMesaBuffers whose X window has been destroyed.
1184 * Deallocate any such XMesaBuffers.
1186 void XMesaGarbageCollect( void )
1188 XMesaBuffer b, next;
1189 for (b=XMesaBufferList; b; b=next) {
1192 b->xm_visual->display &&
1194 b->type == WINDOW) {
1195 XSync(b->xm_visual->display, False);
1196 if (!window_exists( b->xm_visual->display, b->ws.drawable )) {
1197 /* found a dead window, free the ancillary info */
1198 XMesaDestroyBuffer( b );
1208 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
1209 const int *attrib_list)
1216 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer)
1222 XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask)
1225 dst->st->copy(dst->st, src->st, mask);