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.
61 #include "main/context.h"
62 #include "main/framebuffer.h"
64 #include "state_tracker/st_public.h"
65 #include "state_tracker/st_context.h"
66 #include "pipe/p_defines.h"
67 #include "pipe/p_screen.h"
68 #include "pipe/p_context.h"
70 #include "xm_winsys.h"
74 /* Driver interface routines, set up by xlib backend on library
75 * _init(). These are global in the same way that function names are
78 static struct xm_driver driver;
80 void xmesa_set_driver( const struct xm_driver *templ )
86 * Global X driver lock
88 pipe_mutex _xmesa_lock;
92 /**********************************************************************/
93 /***** X Utility Functions *****/
94 /**********************************************************************/
98 * Return the host's byte order as LSBFirst or MSBFirst ala X.
100 static int host_byte_order( void )
103 char *cptr = (char *) &i;
104 return (*cptr==1) ? LSBFirst : MSBFirst;
109 * Check if the X Shared Memory extension is available.
110 * Return: 0 = not available
111 * 1 = shared XImage support available
112 * 2 = shared Pixmap support available also
114 int xmesa_check_for_xshm( Display *display )
116 #if defined(USE_XSHM)
117 int major, minor, ignore;
120 if (getenv("SP_NO_RAST"))
123 if (getenv("MESA_NOSHM")) {
127 if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) {
128 if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) {
129 return (pixmaps==True) ? 2 : 1;
139 /* No XSHM support */
146 * Return the true number of bits per pixel for XImages.
147 * For example, if we request a 24-bit deep visual we may actually need/get
148 * 32bpp XImages. This function returns the appropriate bpp.
149 * Input: dpy - the X display
150 * visinfo - desribes the visual to be used for XImages
151 * Return: true number of bits per pixel for XImages
154 bits_per_pixel( XMesaVisual xmv )
156 Display *dpy = xmv->display;
157 XVisualInfo * visinfo = xmv->visinfo;
160 /* Create a temporary XImage */
161 img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
162 ZPixmap, 0, /*format, offset*/
163 (char*) MALLOC(8), /*data*/
164 1, 1, /*width, height*/
169 /* grab the bits/pixel value */
170 bitsPerPixel = img->bits_per_pixel;
171 /* free the XImage */
172 _mesa_free( img->data );
174 XDestroyImage( img );
181 * Determine if a given X window ID is valid (window exists).
182 * Do this by calling XGetWindowAttributes() for the window and
183 * checking if we catch an X error.
184 * Input: dpy - the display
185 * win - the window to check for existance
186 * Return: GL_TRUE - window exists
187 * GL_FALSE - window doesn't exist
189 static GLboolean WindowExistsFlag;
191 static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr )
194 if (xerr->error_code == BadWindow) {
195 WindowExistsFlag = GL_FALSE;
200 static GLboolean window_exists( Display *dpy, Window win )
202 XWindowAttributes wa;
203 int (*old_handler)( Display*, XErrorEvent* );
204 WindowExistsFlag = GL_TRUE;
205 old_handler = XSetErrorHandler(window_exists_err_handler);
206 XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
207 XSetErrorHandler(old_handler);
208 return WindowExistsFlag;
212 get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height )
217 unsigned int w, h, bw, depth;
218 stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
226 * Return the size of the window (or pixmap) that corresponds to the
228 * \param width returns width in pixels
229 * \param height returns height in pixels
232 xmesa_get_window_size(Display *dpy, XMesaBuffer b,
233 GLuint *width, GLuint *height)
237 pipe_mutex_lock(_xmesa_lock);
238 XSync(b->xm_visual->display, 0); /* added for Chromium */
239 stat = get_drawable_size(dpy, b->drawable, width, height);
240 pipe_mutex_unlock(_xmesa_lock);
243 /* probably querying a window that's recently been destroyed */
244 _mesa_warning(NULL, "XGetGeometry failed!\n");
245 *width = *height = 1;
249 #define GET_REDMASK(__v) __v->mesa_visual.redMask
250 #define GET_GREENMASK(__v) __v->mesa_visual.greenMask
251 #define GET_BLUEMASK(__v) __v->mesa_visual.blueMask
255 * Choose the pixel format for the given visual.
256 * This will tell the gallium driver how to pack pixel data into
260 choose_pixel_format(XMesaVisual v)
262 boolean native_byte_order = (host_byte_order() ==
263 ImageByteOrder(v->display));
265 if ( GET_REDMASK(v) == 0x0000ff
266 && GET_GREENMASK(v) == 0x00ff00
267 && GET_BLUEMASK(v) == 0xff0000
268 && v->BitsPerPixel == 32) {
269 if (native_byte_order) {
270 /* no byteswapping needed */
271 return 0 /* PIXEL_FORMAT_U_A8_B8_G8_R8 */;
274 return PIPE_FORMAT_R8G8B8A8_UNORM;
277 else if ( GET_REDMASK(v) == 0xff0000
278 && GET_GREENMASK(v) == 0x00ff00
279 && GET_BLUEMASK(v) == 0x0000ff
280 && v->BitsPerPixel == 32) {
281 if (native_byte_order) {
282 /* no byteswapping needed */
283 return PIPE_FORMAT_A8R8G8B8_UNORM;
286 return PIPE_FORMAT_B8G8R8A8_UNORM;
289 else if ( GET_REDMASK(v) == 0x0000ff00
290 && GET_GREENMASK(v) == 0x00ff0000
291 && GET_BLUEMASK(v) == 0xff000000
292 && v->BitsPerPixel == 32) {
293 if (native_byte_order) {
294 /* no byteswapping needed */
295 return PIPE_FORMAT_B8G8R8A8_UNORM;
298 return PIPE_FORMAT_A8R8G8B8_UNORM;
301 else if ( GET_REDMASK(v) == 0xf800
302 && GET_GREENMASK(v) == 0x07e0
303 && GET_BLUEMASK(v) == 0x001f
305 && v->BitsPerPixel == 16) {
307 return PIPE_FORMAT_R5G6B5_UNORM;
316 /**********************************************************************/
317 /***** Linked list of XMesaBuffers *****/
318 /**********************************************************************/
320 XMesaBuffer XMesaBufferList = NULL;
324 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
325 * Note that XMesaBuffer is derived from GLframebuffer.
326 * The new XMesaBuffer will not have any size (Width=Height=0).
328 * \param d the corresponding X drawable (window or pixmap)
329 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
330 * \param vis the buffer's visual
331 * \param cmap the window's colormap, if known.
332 * \return new XMesaBuffer or NULL if any problem
335 create_xmesa_buffer(Drawable d, BufferType type,
336 XMesaVisual vis, Colormap cmap)
340 enum pipe_format colorFormat, depthFormat, stencilFormat;
343 ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
345 b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
355 /* determine PIPE_FORMATs for buffers */
356 colorFormat = choose_pixel_format(vis);
358 if (vis->mesa_visual.depthBits == 0)
359 depthFormat = PIPE_FORMAT_NONE;
360 #ifdef GALLIUM_CELL /* XXX temporary for Cell! */
362 depthFormat = PIPE_FORMAT_S8Z24_UNORM;
364 else if (vis->mesa_visual.depthBits <= 16)
365 depthFormat = PIPE_FORMAT_Z16_UNORM;
366 else if (vis->mesa_visual.depthBits <= 24)
367 depthFormat = PIPE_FORMAT_S8Z24_UNORM;
369 depthFormat = PIPE_FORMAT_Z32_UNORM;
372 if (vis->mesa_visual.stencilBits == 8) {
373 if (depthFormat == PIPE_FORMAT_S8Z24_UNORM)
374 stencilFormat = depthFormat;
376 stencilFormat = PIPE_FORMAT_S8_UNORM;
380 stencilFormat = PIPE_FORMAT_NONE;
381 if (depthFormat == PIPE_FORMAT_S8Z24_UNORM) {
382 /* use 24-bit Z, undefined stencil channel */
383 depthFormat = PIPE_FORMAT_X8Z24_UNORM;
388 get_drawable_size(vis->display, d, &width, &height);
391 * Create framebuffer, but we'll plug in our own renderbuffers below.
393 b->stfb = st_create_framebuffer(&vis->mesa_visual,
394 colorFormat, depthFormat, stencilFormat,
400 * Create scratch XImage for xmesa_display_surface()
402 b->tempImage = XCreateImage(vis->display,
403 vis->visinfo->visual,
405 ZPixmap, 0, /* format, offset */
409 0); /* bytes_per_line */
411 /* GLX_EXT_texture_from_pixmap */
412 b->TextureTarget = 0;
413 b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
414 b->TextureMipmap = 0;
416 /* insert buffer into linked list */
417 b->Next = XMesaBufferList;
425 * Find an XMesaBuffer by matching X display and colormap but NOT matching
426 * the notThis buffer.
429 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis)
432 for (b = XMesaBufferList; b; b = b->Next) {
433 if (b->xm_visual->display == dpy &&
444 * Remove buffer from linked list, delete if no longer referenced.
447 xmesa_free_buffer(XMesaBuffer buffer)
449 XMesaBuffer prev = NULL, b;
451 for (b = XMesaBufferList; b; b = b->Next) {
453 struct gl_framebuffer *fb = &buffer->stfb->Base;
455 /* unlink buffer from list */
457 prev->Next = buffer->Next;
459 XMesaBufferList = buffer->Next;
461 /* mark as delete pending */
462 fb->DeletePending = GL_TRUE;
464 /* Since the X window for the XMesaBuffer is going away, we don't
465 * want to dereference this pointer in the future.
469 buffer->tempImage->data = NULL;
470 XDestroyImage(buffer->tempImage);
472 /* Unreference. If count = zero we'll really delete the buffer */
473 _mesa_reference_framebuffer(&fb, NULL);
475 XFreeGC(b->xm_visual->display, b->gc);
481 /* continue search */
484 /* buffer not found in XMesaBufferList */
485 _mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
490 /**********************************************************************/
491 /***** Misc Private Functions *****/
492 /**********************************************************************/
496 * When a context is bound for the first time, we can finally finish
497 * initializing the context's visual and buffer information.
498 * \param v the XMesaVisual to initialize
499 * \param b the XMesaBuffer to initialize (may be NULL)
500 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
501 * \param window the window/pixmap we're rendering into
502 * \param cmap the colormap associated with the window/pixmap
503 * \return GL_TRUE=success, GL_FALSE=failure
506 initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
507 GLboolean rgb_flag, Drawable window,
510 ASSERT(!b || b->xm_visual == v);
512 /* Save true bits/pixel */
513 v->BitsPerPixel = bits_per_pixel(v);
514 assert(v->BitsPerPixel > 0);
516 if (rgb_flag == GL_FALSE) {
517 /* COLOR-INDEXED WINDOW: not supported*/
522 * We support RGB rendering into almost any kind of visual.
524 const int xclass = v->mesa_visual.visualType;
525 if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) {
527 "XMesa: RGB mode rendering not supported in given visual.\n");
530 v->mesa_visual.indexBits = 0;
532 if (v->BitsPerPixel == 32) {
533 /* We use XImages for all front/back buffers. If an X Window or
534 * X Pixmap is 32bpp, there's no guarantee that the alpha channel
535 * will be preserved. For XImages we're in luck.
537 v->mesa_visual.alphaBits = 8;
542 * If MESA_INFO env var is set print out some debugging info
543 * which can help Brian figure out what's going on when a user
546 if (_mesa_getenv("MESA_INFO")) {
547 _mesa_printf("X/Mesa visual = %p\n", (void *) v);
548 _mesa_printf("X/Mesa level = %d\n", v->mesa_visual.level);
549 _mesa_printf("X/Mesa depth = %d\n", v->visinfo->depth);
550 _mesa_printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
554 /* these should have been set in create_xmesa_buffer */
555 ASSERT(b->drawable == window);
557 /* Setup for single/double buffering */
558 if (v->mesa_visual.doubleBufferMode) {
559 /* Double buffered */
560 b->shm = xmesa_check_for_xshm( v->display );
563 /* X11 graphics context */
564 b->gc = XCreateGC( v->display, window, 0, NULL );
565 XSetFunction( v->display, b->gc, GXcopy );
573 #define NUM_VISUAL_TYPES 6
576 * Convert an X visual type to a GLX visual type.
578 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
580 * \return If \c visualType is a valid X visual type, a GLX visual type will
581 * be returned. Otherwise \c GLX_NONE will be returned.
584 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
588 xmesa_convert_from_x_visual_type( int visualType )
590 static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
591 GLX_STATIC_GRAY, GLX_GRAY_SCALE,
592 GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
593 GLX_TRUE_COLOR, GLX_DIRECT_COLOR
596 return ( (unsigned) visualType < NUM_VISUAL_TYPES )
597 ? glx_visual_types[ visualType ] : GLX_NONE;
601 /**********************************************************************/
602 /***** Public Functions *****/
603 /**********************************************************************/
607 * Create a new X/Mesa visual.
608 * Input: display - X11 display
609 * visinfo - an XVisualInfo pointer
610 * rgb_flag - GL_TRUE = RGB mode,
611 * GL_FALSE = color index mode
612 * alpha_flag - alpha buffer requested?
613 * db_flag - GL_TRUE = double-buffered,
614 * GL_FALSE = single buffered
615 * stereo_flag - stereo visual?
616 * ximage_flag - GL_TRUE = use an XImage for back buffer,
617 * GL_FALSE = use an off-screen pixmap for back buffer
618 * depth_size - requested bits/depth values, or zero
619 * stencil_size - requested bits/stencil values, or zero
620 * accum_red_size - requested bits/red accum values, or zero
621 * accum_green_size - requested bits/green accum values, or zero
622 * accum_blue_size - requested bits/blue accum values, or zero
623 * accum_alpha_size - requested bits/alpha accum values, or zero
624 * num_samples - number of samples/pixel if multisampling, or zero
625 * level - visual level, usually 0
626 * visualCaveat - ala the GLX extension, usually GLX_NONE
627 * Return; a new XMesaVisual or 0 if error.
630 XMesaVisual XMesaCreateVisual( Display *display,
631 XVisualInfo * visinfo,
633 GLboolean alpha_flag,
635 GLboolean stereo_flag,
636 GLboolean ximage_flag,
639 GLint accum_red_size,
640 GLint accum_green_size,
641 GLint accum_blue_size,
642 GLint accum_alpha_size,
648 GLint red_bits, green_bits, blue_bits, alpha_bits;
650 /* For debugging only */
651 if (_mesa_getenv("MESA_XSYNC")) {
652 /* This makes debugging X easier.
653 * In your debugger, set a breakpoint on _XError to stop when an
654 * X protocol error is generated.
656 XSynchronize( display, 1 );
659 v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
664 v->display = display;
666 /* Save a copy of the XVisualInfo struct because the user may X_mesa_free()
667 * the struct but we may need some of the information contained in it
670 v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
675 MEMCPY(v->visinfo, visinfo, sizeof(*visinfo));
677 v->ximage_flag = ximage_flag;
679 v->mesa_visual.redMask = visinfo->red_mask;
680 v->mesa_visual.greenMask = visinfo->green_mask;
681 v->mesa_visual.blueMask = visinfo->blue_mask;
682 v->mesa_visual.visualID = visinfo->visualid;
683 v->mesa_visual.screen = visinfo->screen;
685 #if !(defined(__cplusplus) || defined(c_plusplus))
686 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->class);
688 v->mesa_visual.visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
691 v->mesa_visual.visualRating = visualCaveat;
694 v->mesa_visual.alphaBits = 8;
696 (void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
699 const int xclass = v->mesa_visual.visualType;
700 if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
701 red_bits = _mesa_bitcount(GET_REDMASK(v));
702 green_bits = _mesa_bitcount(GET_GREENMASK(v));
703 blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
706 /* this is an approximation */
708 depth = v->visinfo->depth;
709 red_bits = depth / 3;
711 green_bits = depth / 2;
715 assert( red_bits + green_bits + blue_bits == v->visinfo->depth );
717 alpha_bits = v->mesa_visual.alphaBits;
720 _mesa_initialize_visual( &v->mesa_visual,
721 rgb_flag, db_flag, stereo_flag,
722 red_bits, green_bits,
723 blue_bits, alpha_bits,
724 v->mesa_visual.indexBits,
727 accum_red_size, accum_green_size,
728 accum_blue_size, accum_alpha_size,
732 v->mesa_visual.level = level;
738 void XMesaDestroyVisual( XMesaVisual v )
740 _mesa_free(v->visinfo);
747 * Create a new XMesaContext.
748 * \param v the XMesaVisual
749 * \param share_list another XMesaContext with which to share display
750 * lists or NULL if no sharing is wanted.
751 * \return an XMesaContext or NULL if error.
754 XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list )
756 static GLboolean firstTime = GL_TRUE;
757 static struct pipe_screen *screen = NULL;
758 struct pipe_context *pipe = NULL;
764 pipe_mutex_init(_xmesa_lock);
765 screen = driver.create_pipe_screen();
766 firstTime = GL_FALSE;
769 /* Note: the XMesaContext contains a Mesa GLcontext struct (inheritance) */
770 c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
774 pf = choose_pixel_format(v);
778 c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
779 c->xm_read_buffer = NULL;
784 pipe = driver.create_pipe_context( screen,
789 c->st = st_create_context(pipe,
791 share_list ? share_list->st : NULL);
795 mesaCtx = c->st->ctx;
796 c->st->ctx->DriverCtx = c;
799 _mesa_enable_sw_extensions(mesaCtx);
800 _mesa_enable_1_3_extensions(mesaCtx);
801 _mesa_enable_1_4_extensions(mesaCtx);
802 _mesa_enable_1_5_extensions(mesaCtx);
803 _mesa_enable_2_0_extensions(mesaCtx);
810 st_destroy_context(c->st);
821 void XMesaDestroyContext( XMesaContext c )
823 st_destroy_context(c->st);
825 /* FIXME: We should destroy the screen here, but if we do so, surfaces may
826 * outlive it, causing segfaults
827 struct pipe_screen *screen = c->st->pipe->screen;
828 screen->destroy(screen);
837 * Private function for creating an XMesaBuffer which corresponds to an
838 * X window or pixmap.
839 * \param v the window's XMesaVisual
840 * \param w the window we're wrapping
841 * \return new XMesaBuffer or NULL if error
844 XMesaCreateWindowBuffer(XMesaVisual v, Window w)
846 XWindowAttributes attr;
854 /* Check that window depth matches visual depth */
855 XGetWindowAttributes( v->display, w, &attr );
857 if (v->visinfo->depth != depth) {
858 _mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
859 v->visinfo->depth, depth);
865 cmap = attr.colormap;
868 _mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
869 /* this is weird, a window w/out a colormap!? */
870 /* OK, let's just allocate a new one and hope for the best */
871 cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
874 b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap);
878 if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
879 (Drawable) w, cmap )) {
880 xmesa_free_buffer(b);
890 * Create a new XMesaBuffer from an X pixmap.
892 * \param v the XMesaVisual
893 * \param p the pixmap
894 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
895 * \c GLX_DIRECT_COLOR visual for the pixmap
896 * \returns new XMesaBuffer or NULL if error
899 XMesaCreatePixmapBuffer(XMesaVisual v, Pixmap p, Colormap cmap)
905 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
909 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
910 (Drawable) p, cmap)) {
911 xmesa_free_buffer(b);
920 * For GLX_EXT_texture_from_pixmap
923 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
925 int format, int target, int mipmap)
927 GET_CURRENT_CONTEXT(ctx);
929 GLuint width, height;
933 b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
937 /* get pixmap size, update framebuffer/renderbuffer dims */
938 xmesa_get_window_size(v->display, b, &width, &height);
939 _mesa_resize_framebuffer(NULL, &(b->stfb->Base), width, height);
943 if (ctx->Extensions.ARB_texture_non_power_of_two) {
944 target = GLX_TEXTURE_2D_EXT;
946 else if ( _mesa_bitcount(width) == 1
947 && _mesa_bitcount(height) == 1) {
948 /* power of two size */
950 target = GLX_TEXTURE_1D_EXT;
953 target = GLX_TEXTURE_2D_EXT;
956 else if (ctx->Extensions.NV_texture_rectangle) {
957 target = GLX_TEXTURE_RECTANGLE_EXT;
960 /* non power of two textures not supported */
961 XMesaDestroyBuffer(b);
966 b->TextureTarget = target;
967 b->TextureFormat = format;
968 b->TextureMipmap = mipmap;
970 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
971 (Drawable) p, cmap)) {
972 xmesa_free_buffer(b);
982 XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
983 unsigned int width, unsigned int height)
986 Drawable drawable; /* X Pixmap Drawable */
989 /* allocate pixmap for front buffer */
990 root = RootWindow( v->display, v->visinfo->screen );
991 drawable = XCreatePixmap(v->display, root, width, height,
996 b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
1000 if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
1002 xmesa_free_buffer(b);
1012 * Deallocate an XMesaBuffer structure and all related info.
1015 XMesaDestroyBuffer(XMesaBuffer b)
1017 xmesa_free_buffer(b);
1022 * Query the current window size and update the corresponding GLframebuffer
1023 * and all attached renderbuffers.
1025 * 1. the first time a buffer is bound to a context.
1026 * 2. SwapBuffers. XXX probabaly from xm_flush_frontbuffer() too...
1027 * Note: it's possible (and legal) for xmctx to be NULL. That can happen
1028 * when resizing a buffer when no rendering context is bound.
1031 xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
1033 GLuint width, height;
1034 xmesa_get_window_size(drawBuffer->xm_visual->display, drawBuffer, &width, &height);
1035 st_resize_framebuffer(drawBuffer->stfb, width, height);
1042 * Bind buffer b to context c and make c the current rendering context.
1045 GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
1046 XMesaBuffer readBuffer )
1048 XMesaContext old_ctx = XMesaGetCurrentContext();
1050 if (old_ctx && old_ctx != c) {
1051 XMesaFlush(old_ctx);
1052 old_ctx->xm_buffer = NULL;
1053 old_ctx->xm_read_buffer = NULL;
1057 if (!drawBuffer || !readBuffer)
1058 return GL_FALSE; /* must specify buffers! */
1061 c->xm_buffer == drawBuffer &&
1062 c->xm_read_buffer == readBuffer)
1065 c->xm_buffer = drawBuffer;
1066 c->xm_read_buffer = readBuffer;
1068 st_make_current(c->st, drawBuffer->stfb, readBuffer->stfb);
1070 xmesa_check_and_update_buffer_size(c, drawBuffer);
1071 if (readBuffer != drawBuffer)
1072 xmesa_check_and_update_buffer_size(c, readBuffer);
1074 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1075 drawBuffer->wasCurrent = GL_TRUE;
1079 st_make_current( NULL, NULL, NULL );
1087 * Unbind the context c from its buffer.
1089 GLboolean XMesaUnbindContext( XMesaContext c )
1091 /* A no-op for XFree86 integration purposes */
1096 XMesaContext XMesaGetCurrentContext( void )
1098 GET_CURRENT_CONTEXT(ctx);
1100 XMesaContext xmesa = xmesa_context(ctx);
1111 * Swap front and back color buffers and have winsys display front buffer.
1112 * If there's no front color buffer no swap actually occurs.
1115 void XMesaSwapBuffers( XMesaBuffer b )
1117 struct pipe_surface *frontLeftSurf;
1119 st_swapbuffers(b->stfb, &frontLeftSurf, NULL);
1121 if (frontLeftSurf) {
1122 driver.display_surface(b, frontLeftSurf);
1125 xmesa_check_and_update_buffer_size(NULL, b);
1131 * Copy sub-region of back buffer to front buffer
1133 void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
1135 struct pipe_surface *surf_front;
1136 struct pipe_surface *surf_back;
1137 struct pipe_context *pipe = NULL; /* XXX fix */
1139 st_get_framebuffer_surface(b->stfb, ST_SURFACE_FRONT_LEFT, &surf_front);
1140 st_get_framebuffer_surface(b->stfb, ST_SURFACE_BACK_LEFT, &surf_back);
1142 if (!surf_front || !surf_back)
1145 pipe->surface_copy(pipe,
1146 surf_front, x, y, /* dest */
1147 surf_back, x, y, /* src */
1153 void XMesaFlush( XMesaContext c )
1155 if (c && c->xm_visual->display) {
1157 XSync( c->xm_visual->display, False );
1165 XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d )
1168 for (b=XMesaBufferList; b; b=b->Next) {
1169 if (b->drawable == d && b->xm_visual->display == dpy) {
1178 * Free/destroy all XMesaBuffers associated with given display.
1180 void xmesa_destroy_buffers_on_display(Display *dpy)
1182 XMesaBuffer b, next;
1183 for (b = XMesaBufferList; b; b = next) {
1185 if (b->xm_visual->display == dpy) {
1186 xmesa_free_buffer(b);
1193 * Look for XMesaBuffers whose X window has been destroyed.
1194 * Deallocate any such XMesaBuffers.
1196 void XMesaGarbageCollect( void )
1198 XMesaBuffer b, next;
1199 for (b=XMesaBufferList; b; b=next) {
1202 b->xm_visual->display &&
1204 b->type == WINDOW) {
1205 XSync(b->xm_visual->display, False);
1206 if (!window_exists( b->xm_visual->display, b->drawable )) {
1207 /* found a dead window, free the ancillary info */
1208 XMesaDestroyBuffer( b );
1218 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
1219 const int *attrib_list)
1226 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer)