2 * Mesa 3-D graphics library
5 * Copyright (C) 2010 LunarG Inc.
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 OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
26 * Chia-I Wu <olv@lunarg.com>
29 #include "state_tracker/st_gl_api.h"
31 #include "pipe/p_context.h"
32 #include "pipe/p_screen.h"
33 #include "util/u_format.h"
34 #include "util/u_pointer.h"
35 #include "util/u_inlines.h"
36 #include "util/u_atomic.h"
38 #include "main/mtypes.h"
39 #include "main/context.h"
40 #include "main/texobj.h"
41 #include "main/teximage.h"
42 #include "main/texstate.h"
43 #include "main/texfetch.h"
44 #include "main/framebuffer.h"
45 #include "main/renderbuffer.h"
46 #include "st_texture.h"
48 #include "st_context.h"
49 #include "st_format.h"
50 #include "st_cb_fbo.h"
51 #include "st_manager.h"
53 /* these functions are defined in st_context.c */
55 st_create_context(struct pipe_context
*pipe
,
56 const __GLcontextModes
*visual
,
57 struct st_context
*share
);
58 void st_destroy_context(struct st_context
*st
);
59 void st_flush(struct st_context
*st
, uint pipeFlushFlags
,
60 struct pipe_fence_handle
**fence
);
63 * Cast wrapper to convert a GLframebuffer to an st_framebuffer.
64 * Return NULL if the GLframebuffer is a user-created framebuffer.
65 * We'll only return non-null for window system framebuffers.
66 * Note that this function may fail.
68 static INLINE
struct st_framebuffer
*
69 st_ws_framebuffer(GLframebuffer
*fb
)
71 /* FBO cannot be casted. See st_new_framebuffer */
72 return (struct st_framebuffer
*) ((fb
&& !fb
->Name
) ? fb
: NULL
);
76 * Map an attachment to a buffer index.
78 static INLINE gl_buffer_index
79 attachment_to_buffer_index(enum st_attachment_type statt
)
81 gl_buffer_index index
;
84 case ST_ATTACHMENT_FRONT_LEFT
:
85 index
= BUFFER_FRONT_LEFT
;
87 case ST_ATTACHMENT_BACK_LEFT
:
88 index
= BUFFER_BACK_LEFT
;
90 case ST_ATTACHMENT_FRONT_RIGHT
:
91 index
= BUFFER_FRONT_RIGHT
;
93 case ST_ATTACHMENT_BACK_RIGHT
:
94 index
= BUFFER_BACK_RIGHT
;
96 case ST_ATTACHMENT_DEPTH_STENCIL
:
99 case ST_ATTACHMENT_ACCUM
:
100 index
= BUFFER_ACCUM
;
102 case ST_ATTACHMENT_SAMPLE
:
104 index
= BUFFER_COUNT
;
112 * Map a buffer index to an attachment.
114 static INLINE
enum st_attachment_type
115 buffer_index_to_attachment(gl_buffer_index index
)
117 enum st_attachment_type statt
;
120 case BUFFER_FRONT_LEFT
:
121 statt
= ST_ATTACHMENT_FRONT_LEFT
;
123 case BUFFER_BACK_LEFT
:
124 statt
= ST_ATTACHMENT_BACK_LEFT
;
126 case BUFFER_FRONT_RIGHT
:
127 statt
= ST_ATTACHMENT_FRONT_RIGHT
;
129 case BUFFER_BACK_RIGHT
:
130 statt
= ST_ATTACHMENT_BACK_RIGHT
;
133 statt
= ST_ATTACHMENT_DEPTH_STENCIL
;
136 statt
= ST_ATTACHMENT_ACCUM
;
139 statt
= ST_ATTACHMENT_INVALID
;
147 * Validate a framebuffer to make sure up-to-date pipe_textures are used.
150 st_framebuffer_validate(struct st_framebuffer
*stfb
, struct st_context
*st
)
152 struct pipe_screen
*screen
= st
->pipe
->screen
;
153 struct pipe_resource
*textures
[ST_ATTACHMENT_COUNT
];
156 boolean changed
= FALSE
;
158 if (!p_atomic_read(&stfb
->revalidate
))
161 /* validate the fb */
162 if (!stfb
->iface
->validate(stfb
->iface
, stfb
->statts
, stfb
->num_statts
, textures
))
165 width
= stfb
->Base
.Width
;
166 height
= stfb
->Base
.Height
;
168 for (i
= 0; i
< stfb
->num_statts
; i
++) {
169 struct st_renderbuffer
*strb
;
170 struct pipe_surface
*ps
;
176 idx
= attachment_to_buffer_index(stfb
->statts
[i
]);
177 if (idx
>= BUFFER_COUNT
) {
178 pipe_resource_reference(&textures
[i
], NULL
);
182 strb
= st_renderbuffer(stfb
->Base
.Attachment
[idx
].Renderbuffer
);
184 if (strb
->texture
== textures
[i
]) {
185 pipe_resource_reference(&textures
[i
], NULL
);
189 ps
= screen
->get_tex_surface(screen
, textures
[i
], 0, 0, 0,
190 PIPE_BIND_RENDER_TARGET
);
192 pipe_surface_reference(&strb
->surface
, ps
);
193 pipe_resource_reference(&strb
->texture
, ps
->texture
);
194 /* ownership transfered */
195 pipe_surface_reference(&ps
, NULL
);
199 strb
->Base
.Width
= strb
->surface
->width
;
200 strb
->Base
.Height
= strb
->surface
->height
;
202 width
= strb
->Base
.Width
;
203 height
= strb
->Base
.Height
;
206 pipe_resource_reference(&textures
[i
], NULL
);
210 st
->dirty
.st
|= ST_NEW_FRAMEBUFFER
;
211 _mesa_resize_framebuffer(st
->ctx
, &stfb
->Base
, width
, height
);
213 assert(stfb
->Base
.Width
== width
);
214 assert(stfb
->Base
.Height
== height
);
217 p_atomic_set(&stfb
->revalidate
, FALSE
);
221 * Update the attachments to validate by looping the existing renderbuffers.
224 st_framebuffer_update_attachments(struct st_framebuffer
*stfb
)
228 stfb
->num_statts
= 0;
229 for (idx
= 0; idx
< BUFFER_COUNT
; idx
++) {
230 struct st_renderbuffer
*strb
;
231 enum st_attachment_type statt
;
233 strb
= st_renderbuffer(stfb
->Base
.Attachment
[idx
].Renderbuffer
);
234 if (!strb
|| strb
->software
)
237 statt
= buffer_index_to_attachment(idx
);
238 if (statt
!= ST_ATTACHMENT_INVALID
&&
239 st_visual_have_buffers(stfb
->iface
->visual
, 1 << statt
))
240 stfb
->statts
[stfb
->num_statts
++] = statt
;
243 p_atomic_set(&stfb
->revalidate
, TRUE
);
247 * Add a renderbuffer to the framebuffer.
250 st_framebuffer_add_renderbuffer(struct st_framebuffer
*stfb
,
253 struct gl_renderbuffer
*rb
;
254 enum pipe_format format
;
258 /* do not distinguish depth/stencil buffers */
259 if (idx
== BUFFER_STENCIL
)
264 format
= stfb
->iface
->visual
->depth_stencil_format
;
268 format
= stfb
->iface
->visual
->accum_format
;
272 format
= stfb
->iface
->visual
->color_format
;
277 if (format
== PIPE_FORMAT_NONE
)
280 samples
= stfb
->iface
->visual
->samples
;
282 samples
= st_get_msaa();
284 rb
= st_new_renderbuffer_fb(format
, samples
, sw
);
288 if (idx
!= BUFFER_DEPTH
) {
289 _mesa_add_renderbuffer(&stfb
->Base
, idx
, rb
);
292 if (util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_ZS
, 0))
293 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_DEPTH
, rb
);
294 if (util_format_get_component_bits(format
, UTIL_FORMAT_COLORSPACE_ZS
, 1))
295 _mesa_add_renderbuffer(&stfb
->Base
, BUFFER_STENCIL
, rb
);
302 * Intialize a __GLcontextModes from a visual.
305 st_visual_to_context_mode(const struct st_visual
*visual
,
306 __GLcontextModes
*mode
)
308 memset(mode
, 0, sizeof(*mode
));
310 if (st_visual_have_buffers(visual
, ST_ATTACHMENT_BACK_LEFT_MASK
))
311 mode
->doubleBufferMode
= GL_TRUE
;
312 if (st_visual_have_buffers(visual
,
313 ST_ATTACHMENT_FRONT_RIGHT_MASK
| ST_ATTACHMENT_BACK_RIGHT_MASK
))
314 mode
->stereoMode
= GL_TRUE
;
316 if (visual
->color_format
!= PIPE_FORMAT_NONE
) {
317 mode
->rgbMode
= GL_TRUE
;
320 util_format_get_component_bits(visual
->color_format
,
321 UTIL_FORMAT_COLORSPACE_RGB
, 0);
323 util_format_get_component_bits(visual
->color_format
,
324 UTIL_FORMAT_COLORSPACE_RGB
, 1);
326 util_format_get_component_bits(visual
->color_format
,
327 UTIL_FORMAT_COLORSPACE_RGB
, 2);
329 util_format_get_component_bits(visual
->color_format
,
330 UTIL_FORMAT_COLORSPACE_RGB
, 3);
332 mode
->rgbBits
= mode
->redBits
+
333 mode
->greenBits
+ mode
->blueBits
+ mode
->alphaBits
;
336 if (visual
->depth_stencil_format
!= PIPE_FORMAT_NONE
) {
338 util_format_get_component_bits(visual
->depth_stencil_format
,
339 UTIL_FORMAT_COLORSPACE_ZS
, 0);
341 util_format_get_component_bits(visual
->depth_stencil_format
,
342 UTIL_FORMAT_COLORSPACE_ZS
, 1);
344 mode
->haveDepthBuffer
= mode
->depthBits
> 0;
345 mode
->haveStencilBuffer
= mode
->stencilBits
> 0;
348 if (visual
->accum_format
!= PIPE_FORMAT_NONE
) {
349 mode
->haveAccumBuffer
= GL_TRUE
;
352 util_format_get_component_bits(visual
->accum_format
,
353 UTIL_FORMAT_COLORSPACE_RGB
, 0);
354 mode
->accumGreenBits
=
355 util_format_get_component_bits(visual
->accum_format
,
356 UTIL_FORMAT_COLORSPACE_RGB
, 1);
357 mode
->accumBlueBits
=
358 util_format_get_component_bits(visual
->accum_format
,
359 UTIL_FORMAT_COLORSPACE_RGB
, 2);
360 mode
->accumAlphaBits
=
361 util_format_get_component_bits(visual
->accum_format
,
362 UTIL_FORMAT_COLORSPACE_RGB
, 3);
365 if (visual
->samples
) {
366 mode
->sampleBuffers
= 1;
367 mode
->samples
= visual
->samples
;
372 * Determine the default draw or read buffer from a visual.
375 st_visual_to_default_buffer(const struct st_visual
*visual
,
376 GLenum
*buffer
, GLint
*index
)
378 enum st_attachment_type statt
;
382 statt
= visual
->render_buffer
;
383 /* do nothing if an invalid render buffer is specified */
384 if (statt
== ST_ATTACHMENT_INVALID
||
385 !st_visual_have_buffers(visual
, 1 << statt
))
389 case ST_ATTACHMENT_FRONT_LEFT
:
391 idx
= BUFFER_FRONT_LEFT
;
393 case ST_ATTACHMENT_BACK_LEFT
:
395 idx
= BUFFER_BACK_LEFT
;
397 case ST_ATTACHMENT_FRONT_RIGHT
:
398 buf
= GL_FRONT_RIGHT
;
399 idx
= BUFFER_FRONT_RIGHT
;
401 case ST_ATTACHMENT_BACK_RIGHT
:
403 idx
= BUFFER_BACK_RIGHT
;
411 if (buf
!= GL_NONE
) {
420 * Create a framebuffer from a manager interface.
422 static struct st_framebuffer
*
423 st_framebuffer_create(struct st_framebuffer_iface
*stfbi
)
425 struct st_framebuffer
*stfb
;
426 __GLcontextModes mode
;
429 stfb
= CALLOC_STRUCT(st_framebuffer
);
433 st_visual_to_context_mode(stfbi
->visual
, &mode
);
434 _mesa_initialize_window_framebuffer(&stfb
->Base
, &mode
);
436 /* modify the draw/read buffers of the fb */
437 st_visual_to_default_buffer(stfbi
->visual
, &stfb
->Base
.ColorDrawBuffer
[0],
438 &stfb
->Base
._ColorDrawBufferIndexes
[0]);
439 st_visual_to_default_buffer(stfbi
->visual
, &stfb
->Base
.ColorReadBuffer
,
440 &stfb
->Base
._ColorReadBufferIndex
);
444 /* add the color buffer */
445 idx
= stfb
->Base
._ColorDrawBufferIndexes
[0];
446 if (!st_framebuffer_add_renderbuffer(stfb
, idx
)) {
451 st_framebuffer_add_renderbuffer(stfb
, BUFFER_DEPTH
);
452 st_framebuffer_add_renderbuffer(stfb
, BUFFER_ACCUM
);
454 st_framebuffer_update_attachments(stfb
);
456 stfb
->Base
.Initialized
= GL_TRUE
;
462 * Reference a framebuffer.
465 st_framebuffer_reference(struct st_framebuffer
**ptr
,
466 struct st_framebuffer
*stfb
)
468 GLframebuffer
*fb
= &stfb
->Base
;
469 _mesa_reference_framebuffer((GLframebuffer
**) ptr
, fb
);
473 st_context_notify_invalid_framebuffer(struct st_context_iface
*stctxi
,
474 struct st_framebuffer_iface
*stfbi
)
476 struct st_context
*st
= (struct st_context
*) stctxi
;
477 struct st_framebuffer
*stfb
;
479 /* either draw or read winsys fb */
480 stfb
= st_ws_framebuffer(st
->ctx
->WinSysDrawBuffer
);
481 if (!stfb
|| stfb
->iface
!= stfbi
)
482 stfb
= st_ws_framebuffer(st
->ctx
->WinSysReadBuffer
);
483 assert(stfb
&& stfb
->iface
== stfbi
);
485 p_atomic_set(&stfb
->revalidate
, TRUE
);
489 st_context_flush(struct st_context_iface
*stctxi
, unsigned flags
,
490 struct pipe_fence_handle
**fence
)
492 struct st_context
*st
= (struct st_context
*) stctxi
;
493 st_flush(st
, flags
, fence
);
494 if (flags
& PIPE_FLUSH_RENDER_CACHE
)
495 st_manager_flush_frontbuffer(st
);
499 st_context_teximage(struct st_context_iface
*stctxi
, enum st_texture_type target
,
500 int level
, enum pipe_format internal_format
,
501 struct pipe_resource
*tex
, boolean mipmap
)
503 struct st_context
*st
= (struct st_context
*) stctxi
;
504 GLcontext
*ctx
= st
->ctx
;
505 struct gl_texture_unit
*texUnit
= _mesa_get_current_tex_unit(ctx
);
506 struct gl_texture_object
*texObj
;
507 struct gl_texture_image
*texImage
;
508 struct st_texture_object
*stObj
;
509 struct st_texture_image
*stImage
;
510 GLenum internalFormat
;
511 GLuint width
, height
, depth
;
515 target
= GL_TEXTURE_1D
;
518 target
= GL_TEXTURE_2D
;
521 target
= GL_TEXTURE_3D
;
523 case ST_TEXTURE_RECT
:
524 target
= GL_TEXTURE_RECTANGLE_ARB
;
531 texObj
= _mesa_select_tex_object(ctx
, texUnit
, target
);
532 _mesa_lock_texture(ctx
, texObj
);
534 stObj
= st_texture_object(texObj
);
535 /* switch to surface based */
536 if (!stObj
->surface_based
) {
537 _mesa_clear_texture_object(ctx
, texObj
);
538 stObj
->surface_based
= GL_TRUE
;
541 texImage
= _mesa_get_tex_image(ctx
, texObj
, target
, level
);
542 stImage
= st_texture_image(texImage
);
545 * XXX When internal_format and tex->format differ, st_finalize_texture
546 * needs to allocate a new texture with internal_format and copy the
547 * texture here into the new one. It will result in surface_copy being
548 * called on surfaces whose formats differ.
550 * To avoid that, internal_format is (wrongly) ignored here. A sane fix
551 * is to use a sampler view.
553 if (!st_sampler_compat_formats(tex
->format
, internal_format
))
554 internal_format
= tex
->format
;
556 if (util_format_get_component_bits(internal_format
,
557 UTIL_FORMAT_COLORSPACE_RGB
, 3) > 0)
558 internalFormat
= GL_RGBA
;
560 internalFormat
= GL_RGB
;
561 _mesa_init_teximage_fields(ctx
, target
, texImage
,
562 tex
->width0
, tex
->height0
, 1, 0, internalFormat
);
563 texImage
->TexFormat
= st_ChooseTextureFormat(ctx
, internalFormat
,
564 GL_RGBA
, GL_UNSIGNED_BYTE
);
565 _mesa_set_fetch_functions(texImage
, 2);
568 height
= tex
->height0
;
571 /* grow the image size until we hit level = 0 */
583 _mesa_clear_texture_image(ctx
, texImage
);
584 width
= height
= depth
= 0;
587 pipe_resource_reference(&stImage
->pt
, tex
);
588 stObj
->width0
= width
;
589 stObj
->height0
= height
;
590 stObj
->depth0
= depth
;
592 _mesa_dirty_texobj(ctx
, texObj
, GL_TRUE
);
593 _mesa_unlock_texture(ctx
, texObj
);
599 st_context_destroy(struct st_context_iface
*stctxi
)
601 struct st_context
*st
= (struct st_context
*) stctxi
;
602 st_destroy_context(st
);
605 static struct st_context_iface
*
606 st_api_create_context(struct st_api
*stapi
, struct st_manager
*smapi
,
607 const struct st_visual
*visual
,
608 struct st_context_iface
*shared_stctxi
)
610 struct st_context
*shared_ctx
= (struct st_context
*) shared_stctxi
;
611 struct st_context
*st
;
612 struct pipe_context
*pipe
;
613 __GLcontextModes mode
;
615 pipe
= smapi
->screen
->context_create(smapi
->screen
, NULL
);
619 st_visual_to_context_mode(visual
, &mode
);
620 st
= st_create_context(pipe
, &mode
, shared_ctx
);
626 st
->invalidate_on_gl_viewport
=
627 smapi
->get_param(smapi
, ST_MANAGER_BROKEN_INVALIDATE
);
629 st
->iface
.destroy
= st_context_destroy
;
630 st
->iface
.notify_invalid_framebuffer
=
631 st_context_notify_invalid_framebuffer
;
632 st
->iface
.flush
= st_context_flush
;
633 st
->iface
.teximage
= st_context_teximage
;
634 st
->iface
.copy
= NULL
;
635 st
->iface
.st_context_private
= (void *) smapi
;
641 st_api_make_current(struct st_api
*stapi
, struct st_context_iface
*stctxi
,
642 struct st_framebuffer_iface
*stdrawi
,
643 struct st_framebuffer_iface
*streadi
)
645 struct st_context
*st
= (struct st_context
*) stctxi
;
646 struct st_framebuffer
*stdraw
, *stread
, *stfb
;
649 _glapi_check_multithread();
652 /* reuse/create the draw fb */
653 stfb
= st_ws_framebuffer(st
->ctx
->WinSysDrawBuffer
);
654 if (stfb
&& stfb
->iface
== stdrawi
) {
656 st_framebuffer_reference(&stdraw
, stfb
);
659 stdraw
= st_framebuffer_create(stdrawi
);
662 /* reuse/create the read fb */
663 stfb
= st_ws_framebuffer(st
->ctx
->WinSysReadBuffer
);
664 if (!stfb
|| stfb
->iface
!= streadi
)
666 if (stfb
&& stfb
->iface
== streadi
) {
668 st_framebuffer_reference(&stread
, stfb
);
671 stread
= st_framebuffer_create(streadi
);
674 if (stdraw
&& stread
) {
675 st_framebuffer_validate(stdraw
, st
);
676 if (stread
!= stdraw
)
677 st_framebuffer_validate(stread
, st
);
679 /* modify the draw/read buffers of the context */
680 st_visual_to_default_buffer(stdraw
->iface
->visual
,
681 &st
->ctx
->Color
.DrawBuffer
[0], NULL
);
682 st_visual_to_default_buffer(stread
->iface
->visual
,
683 &st
->ctx
->Pixel
.ReadBuffer
, NULL
);
685 ret
= _mesa_make_current(st
->ctx
, &stdraw
->Base
, &stread
->Base
);
691 st_framebuffer_reference(&stdraw
, NULL
);
692 st_framebuffer_reference(&stread
, NULL
);
695 ret
= _mesa_make_current(NULL
, NULL
, NULL
);
701 static struct st_context_iface
*
702 st_api_get_current(struct st_api
*stapi
)
704 GET_CURRENT_CONTEXT(ctx
);
705 struct st_context
*st
= (ctx
) ? ctx
->st
: NULL
;
707 return (st
) ? &st
->iface
: NULL
;
711 st_api_is_visual_supported(struct st_api
*stapi
,
712 const struct st_visual
*visual
)
718 st_api_get_proc_address(struct st_api
*stapi
, const char *procname
)
720 return (st_proc_t
) _glapi_get_proc_address(procname
);
724 st_api_destroy(struct st_api
*stapi
)
729 * Flush the front buffer if the current context renders to the front buffer.
732 st_manager_flush_frontbuffer(struct st_context
*st
)
734 struct st_framebuffer
*stfb
= st_ws_framebuffer(st
->ctx
->DrawBuffer
);
735 struct st_renderbuffer
*strb
= NULL
;
738 strb
= st_renderbuffer(stfb
->Base
.Attachment
[BUFFER_FRONT_LEFT
].Renderbuffer
);
742 stfb
->iface
->flush_front(stfb
->iface
, ST_ATTACHMENT_FRONT_LEFT
);
746 * Return the surface of an EGLImage.
748 struct pipe_surface
*
749 st_manager_get_egl_image_surface(struct st_context
*st
,
750 void *eglimg
, unsigned usage
)
752 struct st_manager
*smapi
=
753 (struct st_manager
*) st
->iface
.st_context_private
;
754 struct st_egl_image stimg
;
755 struct pipe_surface
*ps
;
757 if (!smapi
|| !smapi
->get_egl_image
)
760 memset(&stimg
, 0, sizeof(stimg
));
761 if (!smapi
->get_egl_image(smapi
, &st
->iface
, eglimg
, &stimg
))
764 ps
= smapi
->screen
->get_tex_surface(smapi
->screen
,
765 stimg
.texture
, stimg
.face
, stimg
.level
, stimg
.zslice
, usage
);
766 pipe_resource_reference(&stimg
.texture
, NULL
);
772 * Re-validate the framebuffers.
775 st_manager_validate_framebuffers(struct st_context
*st
)
777 struct st_framebuffer
*stdraw
= st_ws_framebuffer(st
->ctx
->DrawBuffer
);
778 struct st_framebuffer
*stread
= st_ws_framebuffer(st
->ctx
->ReadBuffer
);
781 st_framebuffer_validate(stdraw
, st
);
782 if (stread
&& stread
!= stdraw
)
783 st_framebuffer_validate(stread
, st
);
787 * Add a color renderbuffer on demand.
790 st_manager_add_color_renderbuffer(struct st_context
*st
, GLframebuffer
*fb
,
793 struct st_framebuffer
*stfb
= st_ws_framebuffer(fb
);
799 if (stfb
->Base
.Attachment
[idx
].Renderbuffer
)
803 case BUFFER_FRONT_LEFT
:
804 case BUFFER_BACK_LEFT
:
805 case BUFFER_FRONT_RIGHT
:
806 case BUFFER_BACK_RIGHT
:
813 if (!st_framebuffer_add_renderbuffer(stfb
, idx
))
816 st_framebuffer_update_attachments(stfb
);
817 st_invalidate_state(st
->ctx
, _NEW_BUFFERS
);
822 struct st_api st_gl_api
= {
824 st_api_get_proc_address
,
825 st_api_is_visual_supported
,
826 st_api_create_context
,
832 * Return the st_api for this state tracker. This might either be GL, GLES1,
833 * GLES2 that mostly depends on the build and link options. But these
834 * functions remain the same either way.
837 st_gl_api_create(void)