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 "pipe/p_defines.h"
60 #include "pipe/p_screen.h"
61 #include "pipe/p_context.h"
63 #include "xm_public.h"
67 /* Driver interface routines, set up by xlib backend on library
68 * _init(). These are global in the same way that function names are
71 static struct xm_driver driver
;
72 static struct st_api
*stapi
;
74 /* Default strict invalidate to false. This means we will not call
75 * XGetGeometry after every swapbuffers, which allows swapbuffers to
76 * remain asynchronous. For apps running at 100fps with synchronous
77 * swapping, a 10% boost is typical. For gears, I see closer to 20%
80 * Note that the work of copying data on swapbuffers doesn't disappear
81 * - this change just allows the X server to execute the PutImage
82 * asynchronously without us effectively blocked until its completion.
84 * This speeds up even llvmpipe's threaded rasterization as the
85 * swapbuffers operation was a large part of the serial component of
88 * The downside of this is correctness - applications which don't call
89 * glViewport on window resizes will get incorrect rendering. A
90 * better solution would be to have per-frame but asynchronous
91 * invalidation. Xcb almost looks as if it could provide this, but
92 * the API doesn't seem to quite be there.
94 boolean xmesa_strict_invalidate
= FALSE
;
96 void xmesa_set_driver( const struct xm_driver
*templ
)
99 stapi
= driver
.create_st_api();
101 xmesa_strict_invalidate
=
102 debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE
);
107 * XXX replace this with a linked list, or better yet, try to attach the
108 * gallium/mesa extra bits to the X Display object with XAddExtension().
110 #define MAX_DISPLAYS 10
111 static struct xmesa_display Displays
[MAX_DISPLAYS
];
112 static int NumDisplays
= 0;
115 xmesa_get_param(struct st_manager
*smapi
,
116 enum st_manager_param param
)
119 case ST_MANAGER_BROKEN_INVALIDATE
:
120 return !xmesa_strict_invalidate
;
127 xmesa_init_display( Display
*display
)
129 pipe_static_mutex(init_mutex
);
133 pipe_mutex_lock(init_mutex
);
135 /* Look for XMesaDisplay which corresponds to 'display' */
136 for (i
= 0; i
< NumDisplays
; i
++) {
137 if (Displays
[i
].display
== display
) {
139 pipe_mutex_unlock(init_mutex
);
144 /* Create new XMesaDisplay */
146 assert(NumDisplays
< MAX_DISPLAYS
);
147 xmdpy
= &Displays
[NumDisplays
];
150 if (!xmdpy
->display
&& display
) {
151 xmdpy
->display
= display
;
152 xmdpy
->screen
= driver
.create_pipe_screen(display
);
153 xmdpy
->smapi
= CALLOC_STRUCT(st_manager
);
155 xmdpy
->smapi
->screen
= xmdpy
->screen
;
156 xmdpy
->smapi
->get_param
= xmesa_get_param
;
159 if (xmdpy
->screen
&& xmdpy
->smapi
) {
160 pipe_mutex_init(xmdpy
->mutex
);
164 xmdpy
->screen
->destroy(xmdpy
->screen
);
165 xmdpy
->screen
= NULL
;
172 xmdpy
->display
= NULL
;
175 if (!xmdpy
->display
|| xmdpy
->display
!= display
)
178 pipe_mutex_unlock(init_mutex
);
183 /**********************************************************************/
184 /***** X Utility Functions *****/
185 /**********************************************************************/
189 * Return the host's byte order as LSBFirst or MSBFirst ala X.
191 static int host_byte_order( void )
194 char *cptr
= (char *) &i
;
195 return (*cptr
==1) ? LSBFirst
: MSBFirst
;
202 * Return the true number of bits per pixel for XImages.
203 * For example, if we request a 24-bit deep visual we may actually need/get
204 * 32bpp XImages. This function returns the appropriate bpp.
205 * Input: dpy - the X display
206 * visinfo - desribes the visual to be used for XImages
207 * Return: true number of bits per pixel for XImages
210 bits_per_pixel( XMesaVisual xmv
)
212 Display
*dpy
= xmv
->display
;
213 XVisualInfo
* visinfo
= xmv
->visinfo
;
216 /* Create a temporary XImage */
217 img
= XCreateImage( dpy
, visinfo
->visual
, visinfo
->depth
,
218 ZPixmap
, 0, /*format, offset*/
219 (char*) MALLOC(8), /*data*/
220 1, 1, /*width, height*/
225 /* grab the bits/pixel value */
226 bitsPerPixel
= img
->bits_per_pixel
;
227 /* free the XImage */
230 XDestroyImage( img
);
237 * Determine if a given X window ID is valid (window exists).
238 * Do this by calling XGetWindowAttributes() for the window and
239 * checking if we catch an X error.
240 * Input: dpy - the display
241 * win - the window to check for existance
242 * Return: GL_TRUE - window exists
243 * GL_FALSE - window doesn't exist
245 static GLboolean WindowExistsFlag
;
247 static int window_exists_err_handler( Display
* dpy
, XErrorEvent
* xerr
)
250 if (xerr
->error_code
== BadWindow
) {
251 WindowExistsFlag
= GL_FALSE
;
256 static GLboolean
window_exists( Display
*dpy
, Window win
)
258 XWindowAttributes wa
;
259 int (*old_handler
)( Display
*, XErrorEvent
* );
260 WindowExistsFlag
= GL_TRUE
;
261 old_handler
= XSetErrorHandler(window_exists_err_handler
);
262 XGetWindowAttributes( dpy
, win
, &wa
); /* dummy request */
263 XSetErrorHandler(old_handler
);
264 return WindowExistsFlag
;
268 get_drawable_size( Display
*dpy
, Drawable d
, uint
*width
, uint
*height
)
273 unsigned int w
, h
, bw
, depth
;
274 stat
= XGetGeometry(dpy
, d
, &root
, &xpos
, &ypos
, &w
, &h
, &bw
, &depth
);
282 * Return the size of the window (or pixmap) that corresponds to the
284 * \param width returns width in pixels
285 * \param height returns height in pixels
288 xmesa_get_window_size(Display
*dpy
, XMesaBuffer b
,
289 GLuint
*width
, GLuint
*height
)
291 XMesaDisplay xmdpy
= xmesa_init_display(dpy
);
294 pipe_mutex_lock(xmdpy
->mutex
);
295 stat
= get_drawable_size(dpy
, b
->ws
.drawable
, width
, height
);
296 pipe_mutex_unlock(xmdpy
->mutex
);
299 /* probably querying a window that's recently been destroyed */
300 _mesa_warning(NULL
, "XGetGeometry failed!\n");
301 *width
= *height
= 1;
305 #define GET_REDMASK(__v) __v->mesa_visual.redMask
306 #define GET_GREENMASK(__v) __v->mesa_visual.greenMask
307 #define GET_BLUEMASK(__v) __v->mesa_visual.blueMask
311 * Choose the pixel format for the given visual.
312 * This will tell the gallium driver how to pack pixel data into
316 choose_pixel_format(XMesaVisual v
)
318 boolean native_byte_order
= (host_byte_order() ==
319 ImageByteOrder(v
->display
));
321 if ( GET_REDMASK(v
) == 0x0000ff
322 && GET_GREENMASK(v
) == 0x00ff00
323 && GET_BLUEMASK(v
) == 0xff0000
324 && v
->BitsPerPixel
== 32) {
325 if (native_byte_order
) {
326 /* no byteswapping needed */
327 return PIPE_FORMAT_R8G8B8A8_UNORM
;
330 return PIPE_FORMAT_A8B8G8R8_UNORM
;
333 else if ( GET_REDMASK(v
) == 0xff0000
334 && GET_GREENMASK(v
) == 0x00ff00
335 && GET_BLUEMASK(v
) == 0x0000ff
336 && v
->BitsPerPixel
== 32) {
337 if (native_byte_order
) {
338 /* no byteswapping needed */
339 return PIPE_FORMAT_B8G8R8A8_UNORM
;
342 return PIPE_FORMAT_A8R8G8B8_UNORM
;
345 else if ( GET_REDMASK(v
) == 0x0000ff00
346 && GET_GREENMASK(v
) == 0x00ff0000
347 && GET_BLUEMASK(v
) == 0xff000000
348 && v
->BitsPerPixel
== 32) {
349 if (native_byte_order
) {
350 /* no byteswapping needed */
351 return PIPE_FORMAT_A8R8G8B8_UNORM
;
354 return PIPE_FORMAT_B8G8R8A8_UNORM
;
357 else if ( GET_REDMASK(v
) == 0xf800
358 && GET_GREENMASK(v
) == 0x07e0
359 && GET_BLUEMASK(v
) == 0x001f
361 && v
->BitsPerPixel
== 16) {
363 return PIPE_FORMAT_B5G6R5_UNORM
;
366 return PIPE_FORMAT_NONE
;
371 * Choose a depth/stencil format that satisfies the given depth and
374 static enum pipe_format
375 choose_depth_stencil_format(XMesaDisplay xmdpy
, int depth
, int stencil
)
377 const enum pipe_texture_target target
= PIPE_TEXTURE_2D
;
378 const unsigned tex_usage
= PIPE_BIND_DEPTH_STENCIL
;
379 const unsigned sample_count
= 0;
380 enum pipe_format formats
[8], fmt
;
385 if (depth
<= 16 && stencil
== 0) {
386 formats
[count
++] = PIPE_FORMAT_Z16_UNORM
;
388 if (depth
<= 24 && stencil
== 0) {
389 formats
[count
++] = PIPE_FORMAT_X8Z24_UNORM
;
390 formats
[count
++] = PIPE_FORMAT_Z24X8_UNORM
;
392 if (depth
<= 24 && stencil
<= 8) {
393 formats
[count
++] = PIPE_FORMAT_S8_USCALED_Z24_UNORM
;
394 formats
[count
++] = PIPE_FORMAT_Z24_UNORM_S8_USCALED
;
396 if (depth
<= 32 && stencil
== 0) {
397 formats
[count
++] = PIPE_FORMAT_Z32_UNORM
;
400 fmt
= PIPE_FORMAT_NONE
;
401 for (i
= 0; i
< count
; i
++) {
402 if (xmdpy
->screen
->is_format_supported(xmdpy
->screen
, formats
[i
],
403 target
, sample_count
,
415 /**********************************************************************/
416 /***** Linked list of XMesaBuffers *****/
417 /**********************************************************************/
419 static XMesaBuffer XMesaBufferList
= NULL
;
423 * Allocate a new XMesaBuffer object which corresponds to the given drawable.
424 * Note that XMesaBuffer is derived from struct gl_framebuffer.
425 * The new XMesaBuffer will not have any size (Width=Height=0).
427 * \param d the corresponding X drawable (window or pixmap)
428 * \param type either WINDOW, PIXMAP or PBUFFER, describing d
429 * \param vis the buffer's visual
430 * \param cmap the window's colormap, if known.
431 * \return new XMesaBuffer or NULL if any problem
434 create_xmesa_buffer(Drawable d
, BufferType type
,
435 XMesaVisual vis
, Colormap cmap
)
437 XMesaDisplay xmdpy
= xmesa_init_display(vis
->display
);
441 ASSERT(type
== WINDOW
|| type
== PIXMAP
|| type
== PBUFFER
);
446 b
= (XMesaBuffer
) CALLOC_STRUCT(xmesa_buffer
);
451 b
->ws
.visual
= vis
->visinfo
->visual
;
452 b
->ws
.depth
= vis
->visinfo
->depth
;
458 get_drawable_size(vis
->display
, d
, &width
, &height
);
461 * Create framebuffer, but we'll plug in our own renderbuffers below.
463 b
->stfb
= xmesa_create_st_framebuffer(xmdpy
, b
);
465 /* GLX_EXT_texture_from_pixmap */
466 b
->TextureTarget
= 0;
467 b
->TextureFormat
= GLX_TEXTURE_FORMAT_NONE_EXT
;
468 b
->TextureMipmap
= 0;
470 /* insert buffer into linked list */
471 b
->Next
= XMesaBufferList
;
479 * Find an XMesaBuffer by matching X display and colormap but NOT matching
480 * the notThis buffer.
483 xmesa_find_buffer(Display
*dpy
, Colormap cmap
, XMesaBuffer notThis
)
486 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
487 if (b
->xm_visual
->display
== dpy
&&
498 * Remove buffer from linked list, delete if no longer referenced.
501 xmesa_free_buffer(XMesaBuffer buffer
)
503 XMesaBuffer prev
= NULL
, b
;
505 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
507 /* unlink buffer from list */
509 prev
->Next
= buffer
->Next
;
511 XMesaBufferList
= buffer
->Next
;
513 /* Since the X window for the XMesaBuffer is going away, we don't
514 * want to dereference this pointer in the future.
518 /* XXX we should move the buffer to a delete-pending list and destroy
519 * the buffer until it is no longer current.
521 xmesa_destroy_st_framebuffer(buffer
->stfb
);
527 /* continue search */
530 /* buffer not found in XMesaBufferList */
531 _mesa_problem(NULL
,"xmesa_free_buffer() - buffer not found\n");
536 /**********************************************************************/
537 /***** Misc Private Functions *****/
538 /**********************************************************************/
542 * When a context is bound for the first time, we can finally finish
543 * initializing the context's visual and buffer information.
544 * \param v the XMesaVisual to initialize
545 * \param b the XMesaBuffer to initialize (may be NULL)
546 * \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
547 * \param window the window/pixmap we're rendering into
548 * \param cmap the colormap associated with the window/pixmap
549 * \return GL_TRUE=success, GL_FALSE=failure
552 initialize_visual_and_buffer(XMesaVisual v
, XMesaBuffer b
,
553 GLboolean rgb_flag
, Drawable window
,
556 ASSERT(!b
|| b
->xm_visual
== v
);
558 /* Save true bits/pixel */
559 v
->BitsPerPixel
= bits_per_pixel(v
);
560 assert(v
->BitsPerPixel
> 0);
562 if (rgb_flag
== GL_FALSE
) {
563 /* COLOR-INDEXED WINDOW: not supported*/
568 * We support RGB rendering into almost any kind of visual.
570 const int xclass
= v
->visualType
;
571 if (xclass
!= GLX_TRUE_COLOR
&& xclass
== !GLX_DIRECT_COLOR
) {
573 "XMesa: RGB mode rendering not supported in given visual.\n");
576 v
->mesa_visual
.indexBits
= 0;
578 if (v
->BitsPerPixel
== 32) {
579 /* We use XImages for all front/back buffers. If an X Window or
580 * X Pixmap is 32bpp, there's no guarantee that the alpha channel
581 * will be preserved. For XImages we're in luck.
583 v
->mesa_visual
.alphaBits
= 8;
588 * If MESA_INFO env var is set print out some debugging info
589 * which can help Brian figure out what's going on when a user
592 if (_mesa_getenv("MESA_INFO")) {
593 printf("X/Mesa visual = %p\n", (void *) v
);
594 printf("X/Mesa level = %d\n", v
->mesa_visual
.level
);
595 printf("X/Mesa depth = %d\n", v
->visinfo
->depth
);
596 printf("X/Mesa bits per pixel = %d\n", v
->BitsPerPixel
);
604 #define NUM_VISUAL_TYPES 6
607 * Convert an X visual type to a GLX visual type.
609 * \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
611 * \return If \c visualType is a valid X visual type, a GLX visual type will
612 * be returned. Otherwise \c GLX_NONE will be returned.
615 * This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
619 xmesa_convert_from_x_visual_type( int visualType
)
621 static const int glx_visual_types
[ NUM_VISUAL_TYPES
] = {
622 GLX_STATIC_GRAY
, GLX_GRAY_SCALE
,
623 GLX_STATIC_COLOR
, GLX_PSEUDO_COLOR
,
624 GLX_TRUE_COLOR
, GLX_DIRECT_COLOR
627 return ( (unsigned) visualType
< NUM_VISUAL_TYPES
)
628 ? glx_visual_types
[ visualType
] : GLX_NONE
;
632 /**********************************************************************/
633 /***** Public Functions *****/
634 /**********************************************************************/
638 * Create a new X/Mesa visual.
639 * Input: display - X11 display
640 * visinfo - an XVisualInfo pointer
641 * rgb_flag - GL_TRUE = RGB mode,
642 * GL_FALSE = color index mode
643 * alpha_flag - alpha buffer requested?
644 * db_flag - GL_TRUE = double-buffered,
645 * GL_FALSE = single buffered
646 * stereo_flag - stereo visual?
647 * ximage_flag - GL_TRUE = use an XImage for back buffer,
648 * GL_FALSE = use an off-screen pixmap for back buffer
649 * depth_size - requested bits/depth values, or zero
650 * stencil_size - requested bits/stencil values, or zero
651 * accum_red_size - requested bits/red accum values, or zero
652 * accum_green_size - requested bits/green accum values, or zero
653 * accum_blue_size - requested bits/blue accum values, or zero
654 * accum_alpha_size - requested bits/alpha accum values, or zero
655 * num_samples - number of samples/pixel if multisampling, or zero
656 * level - visual level, usually 0
657 * visualCaveat - ala the GLX extension, usually GLX_NONE
658 * Return; a new XMesaVisual or 0 if error.
661 XMesaVisual
XMesaCreateVisual( Display
*display
,
662 XVisualInfo
* visinfo
,
664 GLboolean alpha_flag
,
666 GLboolean stereo_flag
,
667 GLboolean ximage_flag
,
670 GLint accum_red_size
,
671 GLint accum_green_size
,
672 GLint accum_blue_size
,
673 GLint accum_alpha_size
,
678 XMesaDisplay xmdpy
= xmesa_init_display(display
);
680 GLint red_bits
, green_bits
, blue_bits
, alpha_bits
;
685 /* For debugging only */
686 if (_mesa_getenv("MESA_XSYNC")) {
687 /* This makes debugging X easier.
688 * In your debugger, set a breakpoint on _XError to stop when an
689 * X protocol error is generated.
691 XSynchronize( display
, 1 );
694 v
= (XMesaVisual
) CALLOC_STRUCT(xmesa_visual
);
699 v
->display
= display
;
701 /* Save a copy of the XVisualInfo struct because the user may Xfree()
702 * the struct but we may need some of the information contained in it
705 v
->visinfo
= (XVisualInfo
*) MALLOC(sizeof(*visinfo
));
710 memcpy(v
->visinfo
, visinfo
, sizeof(*visinfo
));
712 v
->ximage_flag
= ximage_flag
;
714 v
->mesa_visual
.redMask
= visinfo
->red_mask
;
715 v
->mesa_visual
.greenMask
= visinfo
->green_mask
;
716 v
->mesa_visual
.blueMask
= visinfo
->blue_mask
;
717 v
->visualID
= visinfo
->visualid
;
718 v
->screen
= visinfo
->screen
;
720 #if !(defined(__cplusplus) || defined(c_plusplus))
721 v
->visualType
= xmesa_convert_from_x_visual_type(visinfo
->class);
723 v
->visualType
= xmesa_convert_from_x_visual_type(visinfo
->c_class
);
726 v
->mesa_visual
.visualRating
= visualCaveat
;
729 v
->mesa_visual
.alphaBits
= 8;
731 (void) initialize_visual_and_buffer( v
, NULL
, rgb_flag
, 0, 0 );
734 const int xclass
= v
->visualType
;
735 if (xclass
== GLX_TRUE_COLOR
|| xclass
== GLX_DIRECT_COLOR
) {
736 red_bits
= _mesa_bitcount(GET_REDMASK(v
));
737 green_bits
= _mesa_bitcount(GET_GREENMASK(v
));
738 blue_bits
= _mesa_bitcount(GET_BLUEMASK(v
));
741 /* this is an approximation */
743 depth
= v
->visinfo
->depth
;
744 red_bits
= depth
/ 3;
746 green_bits
= depth
/ 2;
750 assert( red_bits
+ green_bits
+ blue_bits
== v
->visinfo
->depth
);
752 alpha_bits
= v
->mesa_visual
.alphaBits
;
755 /* initialize visual */
757 struct gl_config
*vis
= &v
->mesa_visual
;
759 vis
->rgbMode
= GL_TRUE
;
760 vis
->doubleBufferMode
= db_flag
;
761 vis
->stereoMode
= stereo_flag
;
763 vis
->redBits
= red_bits
;
764 vis
->greenBits
= green_bits
;
765 vis
->blueBits
= blue_bits
;
766 vis
->alphaBits
= alpha_bits
;
767 vis
->rgbBits
= red_bits
+ green_bits
+ blue_bits
;
770 vis
->depthBits
= depth_size
;
771 vis
->stencilBits
= stencil_size
;
773 vis
->accumRedBits
= accum_red_size
;
774 vis
->accumGreenBits
= accum_green_size
;
775 vis
->accumBlueBits
= accum_blue_size
;
776 vis
->accumAlphaBits
= accum_alpha_size
;
778 vis
->haveAccumBuffer
= accum_red_size
> 0;
779 vis
->haveDepthBuffer
= depth_size
> 0;
780 vis
->haveStencilBuffer
= stencil_size
> 0;
782 vis
->numAuxBuffers
= 0;
784 vis
->sampleBuffers
= 0;
788 v
->stvis
.buffer_mask
= ST_ATTACHMENT_FRONT_LEFT_MASK
;
790 v
->stvis
.buffer_mask
|= ST_ATTACHMENT_BACK_LEFT_MASK
;
792 v
->stvis
.buffer_mask
|= ST_ATTACHMENT_FRONT_RIGHT_MASK
;
794 v
->stvis
.buffer_mask
|= ST_ATTACHMENT_BACK_RIGHT_MASK
;
797 v
->stvis
.color_format
= choose_pixel_format(v
);
798 if (v
->stvis
.color_format
== PIPE_FORMAT_NONE
) {
804 v
->stvis
.depth_stencil_format
=
805 choose_depth_stencil_format(xmdpy
, depth_size
, stencil_size
);
807 v
->stvis
.accum_format
= (accum_red_size
+
808 accum_green_size
+ accum_blue_size
+ accum_alpha_size
) ?
809 PIPE_FORMAT_R16G16B16A16_SNORM
: PIPE_FORMAT_NONE
;
811 v
->stvis
.samples
= num_samples
;
812 v
->stvis
.render_buffer
= ST_ATTACHMENT_INVALID
;
815 v
->mesa_visual
.level
= level
;
821 void XMesaDestroyVisual( XMesaVisual v
)
829 * Return the informative name.
839 * Do per-display initializations.
842 xmesa_init( Display
*display
)
844 xmesa_init_display(display
);
849 * Create a new XMesaContext.
850 * \param v the XMesaVisual
851 * \param share_list another XMesaContext with which to share display
852 * lists or NULL if no sharing is wanted.
853 * \return an XMesaContext or NULL if error.
856 XMesaContext
XMesaCreateContext( XMesaVisual v
, XMesaContext share_list
)
858 XMesaDisplay xmdpy
= xmesa_init_display(v
->display
);
859 struct st_context_attribs attribs
;
865 /* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
866 c
= (XMesaContext
) CALLOC_STRUCT(xmesa_context
);
871 c
->xm_buffer
= NULL
; /* set later by XMesaMakeCurrent */
872 c
->xm_read_buffer
= NULL
;
874 memset(&attribs
, 0, sizeof(attribs
));
875 attribs
.profile
= ST_PROFILE_DEFAULT
;
876 attribs
.visual
= v
->stvis
;
878 c
->st
= stapi
->create_context(stapi
, xmdpy
->smapi
,
879 &attribs
, (share_list
) ? share_list
->st
: NULL
);
883 c
->st
->st_manager_private
= (void *) c
;
889 c
->st
->destroy(c
->st
);
898 void XMesaDestroyContext( XMesaContext c
)
900 c
->st
->destroy(c
->st
);
902 /* FIXME: We should destroy the screen here, but if we do so, surfaces may
903 * outlive it, causing segfaults
904 struct pipe_screen *screen = c->st->pipe->screen;
905 screen->destroy(screen);
914 * Private function for creating an XMesaBuffer which corresponds to an
915 * X window or pixmap.
916 * \param v the window's XMesaVisual
917 * \param w the window we're wrapping
918 * \return new XMesaBuffer or NULL if error
921 XMesaCreateWindowBuffer(XMesaVisual v
, Window w
)
923 XWindowAttributes attr
;
931 /* Check that window depth matches visual depth */
932 XGetWindowAttributes( v
->display
, w
, &attr
);
934 if (v
->visinfo
->depth
!= depth
) {
935 _mesa_warning(NULL
, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
936 v
->visinfo
->depth
, depth
);
942 cmap
= attr
.colormap
;
945 _mesa_warning(NULL
, "Window %u has no colormap!\n", (unsigned int) w
);
946 /* this is weird, a window w/out a colormap!? */
947 /* OK, let's just allocate a new one and hope for the best */
948 cmap
= XCreateColormap(v
->display
, w
, attr
.visual
, AllocNone
);
951 b
= create_xmesa_buffer((Drawable
) w
, WINDOW
, v
, cmap
);
955 if (!initialize_visual_and_buffer( v
, b
, v
->mesa_visual
.rgbMode
,
956 (Drawable
) w
, cmap
)) {
957 xmesa_free_buffer(b
);
967 * Create a new XMesaBuffer from an X pixmap.
969 * \param v the XMesaVisual
970 * \param p the pixmap
971 * \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
972 * \c GLX_DIRECT_COLOR visual for the pixmap
973 * \returns new XMesaBuffer or NULL if error
976 XMesaCreatePixmapBuffer(XMesaVisual v
, Pixmap p
, Colormap cmap
)
982 b
= create_xmesa_buffer((Drawable
) p
, PIXMAP
, v
, cmap
);
986 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
987 (Drawable
) p
, cmap
)) {
988 xmesa_free_buffer(b
);
997 * For GLX_EXT_texture_from_pixmap
1000 XMesaCreatePixmapTextureBuffer(XMesaVisual v
, Pixmap p
,
1002 int format
, int target
, int mipmap
)
1004 GET_CURRENT_CONTEXT(ctx
);
1009 b
= create_xmesa_buffer((Drawable
) p
, PIXMAP
, v
, cmap
);
1013 /* get pixmap size */
1014 xmesa_get_window_size(v
->display
, b
, &b
->width
, &b
->height
);
1018 if (ctx
->Extensions
.ARB_texture_non_power_of_two
) {
1019 target
= GLX_TEXTURE_2D_EXT
;
1021 else if ( _mesa_bitcount(b
->width
) == 1
1022 && _mesa_bitcount(b
->height
) == 1) {
1023 /* power of two size */
1024 if (b
->height
== 1) {
1025 target
= GLX_TEXTURE_1D_EXT
;
1028 target
= GLX_TEXTURE_2D_EXT
;
1031 else if (ctx
->Extensions
.NV_texture_rectangle
) {
1032 target
= GLX_TEXTURE_RECTANGLE_EXT
;
1035 /* non power of two textures not supported */
1036 XMesaDestroyBuffer(b
);
1041 b
->TextureTarget
= target
;
1042 b
->TextureFormat
= format
;
1043 b
->TextureMipmap
= mipmap
;
1045 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1046 (Drawable
) p
, cmap
)) {
1047 xmesa_free_buffer(b
);
1057 XMesaCreatePBuffer(XMesaVisual v
, Colormap cmap
,
1058 unsigned int width
, unsigned int height
)
1061 Drawable drawable
; /* X Pixmap Drawable */
1064 /* allocate pixmap for front buffer */
1065 root
= RootWindow( v
->display
, v
->visinfo
->screen
);
1066 drawable
= XCreatePixmap(v
->display
, root
, width
, height
,
1071 b
= create_xmesa_buffer(drawable
, PBUFFER
, v
, cmap
);
1075 if (!initialize_visual_and_buffer(v
, b
, v
->mesa_visual
.rgbMode
,
1077 xmesa_free_buffer(b
);
1087 * Deallocate an XMesaBuffer structure and all related info.
1090 XMesaDestroyBuffer(XMesaBuffer b
)
1092 xmesa_free_buffer(b
);
1097 * Notify the binding context to validate the buffer.
1100 xmesa_notify_invalid_buffer(XMesaBuffer b
)
1102 XMesaContext xmctx
= XMesaGetCurrentContext();
1104 if (xmctx
&& xmctx
->xm_buffer
== b
)
1105 xmctx
->st
->notify_invalid_framebuffer(xmctx
->st
, b
->stfb
);
1110 * Query the current drawable size and notify the binding context.
1113 xmesa_check_buffer_size(XMesaBuffer b
)
1115 if (b
->type
== PBUFFER
)
1118 xmesa_get_window_size(b
->xm_visual
->display
, b
, &b
->width
, &b
->height
);
1119 xmesa_notify_invalid_buffer(b
);
1124 * Bind buffer b to context c and make c the current rendering context.
1127 GLboolean
XMesaMakeCurrent2( XMesaContext c
, XMesaBuffer drawBuffer
,
1128 XMesaBuffer readBuffer
)
1130 XMesaContext old_ctx
= XMesaGetCurrentContext();
1132 if (old_ctx
&& old_ctx
!= c
) {
1133 XMesaFlush(old_ctx
);
1134 old_ctx
->xm_buffer
= NULL
;
1135 old_ctx
->xm_read_buffer
= NULL
;
1139 if (!drawBuffer
|| !readBuffer
)
1140 return GL_FALSE
; /* must specify buffers! */
1143 c
->xm_buffer
== drawBuffer
&&
1144 c
->xm_read_buffer
== readBuffer
)
1147 xmesa_check_buffer_size(drawBuffer
);
1148 if (readBuffer
!= drawBuffer
)
1149 xmesa_check_buffer_size(readBuffer
);
1151 c
->xm_buffer
= drawBuffer
;
1152 c
->xm_read_buffer
= readBuffer
;
1154 stapi
->make_current(stapi
, c
->st
, drawBuffer
->stfb
, readBuffer
->stfb
);
1156 /* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
1157 drawBuffer
->wasCurrent
= GL_TRUE
;
1161 stapi
->make_current(stapi
, NULL
, NULL
, NULL
);
1169 * Unbind the context c from its buffer.
1171 GLboolean
XMesaUnbindContext( XMesaContext c
)
1173 /* A no-op for XFree86 integration purposes */
1178 XMesaContext
XMesaGetCurrentContext( void )
1180 struct st_context_iface
*st
= stapi
->get_current(stapi
);
1181 return (XMesaContext
) (st
) ? st
->st_manager_private
: NULL
;
1187 * Swap front and back color buffers and have winsys display front buffer.
1188 * If there's no front color buffer no swap actually occurs.
1191 void XMesaSwapBuffers( XMesaBuffer b
)
1193 XMesaContext xmctx
= XMesaGetCurrentContext();
1195 if (xmctx
&& xmctx
->xm_buffer
== b
) {
1196 xmctx
->st
->flush( xmctx
->st
, ST_FLUSH_FRONT
, NULL
);
1199 xmesa_swap_st_framebuffer(b
->stfb
);
1205 * Copy sub-region of back buffer to front buffer
1207 void XMesaCopySubBuffer( XMesaBuffer b
, int x
, int y
, int width
, int height
)
1209 xmesa_copy_st_framebuffer(b
->stfb
,
1210 ST_ATTACHMENT_BACK_LEFT
, ST_ATTACHMENT_FRONT_LEFT
,
1211 x
, y
, width
, height
);
1216 void XMesaFlush( XMesaContext c
)
1218 if (c
&& c
->xm_visual
->display
) {
1219 XMesaDisplay xmdpy
= xmesa_init_display(c
->xm_visual
->display
);
1220 struct pipe_fence_handle
*fence
= NULL
;
1222 c
->st
->flush(c
->st
, ST_FLUSH_FRONT
, &fence
);
1224 xmdpy
->screen
->fence_finish(xmdpy
->screen
, fence
,
1225 PIPE_TIMEOUT_INFINITE
);
1226 xmdpy
->screen
->fence_reference(xmdpy
->screen
, &fence
, NULL
);
1228 XFlush( c
->xm_visual
->display
);
1236 XMesaBuffer
XMesaFindBuffer( Display
*dpy
, Drawable d
)
1239 for (b
= XMesaBufferList
; b
; b
= b
->Next
) {
1240 if (b
->ws
.drawable
== d
&& b
->xm_visual
->display
== dpy
) {
1249 * Free/destroy all XMesaBuffers associated with given display.
1251 void xmesa_destroy_buffers_on_display(Display
*dpy
)
1253 XMesaBuffer b
, next
;
1254 for (b
= XMesaBufferList
; b
; b
= next
) {
1256 if (b
->xm_visual
->display
== dpy
) {
1257 xmesa_free_buffer(b
);
1258 /* delete head of list? */
1259 if (XMesaBufferList
== b
) {
1260 XMesaBufferList
= next
;
1268 * Look for XMesaBuffers whose X window has been destroyed.
1269 * Deallocate any such XMesaBuffers.
1271 void XMesaGarbageCollect( void )
1273 XMesaBuffer b
, next
;
1274 for (b
=XMesaBufferList
; b
; b
=next
) {
1277 b
->xm_visual
->display
&&
1279 b
->type
== WINDOW
) {
1280 XSync(b
->xm_visual
->display
, False
);
1281 if (!window_exists( b
->xm_visual
->display
, b
->ws
.drawable
)) {
1282 /* found a dead window, free the ancillary info */
1283 XMesaDestroyBuffer( b
);
1293 XMesaBindTexImage(Display
*dpy
, XMesaBuffer drawable
, int buffer
,
1294 const int *attrib_list
)
1301 XMesaReleaseTexImage(Display
*dpy
, XMesaBuffer drawable
, int buffer
)
1307 XMesaCopyContext(XMesaContext src
, XMesaContext dst
, unsigned long mask
)
1310 dst
->st
->copy(dst
->st
, src
->st
, mask
);