1 /**************************************************************************
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
30 * Framebuffer/renderbuffer functions.
36 #include "main/imports.h"
37 #include "main/context.h"
38 #include "main/fbobject.h"
39 #include "main/framebuffer.h"
40 #include "main/macros.h"
41 #include "main/mfeatures.h"
42 #include "main/renderbuffer.h"
44 #include "pipe/p_context.h"
45 #include "pipe/p_defines.h"
46 #include "pipe/p_screen.h"
47 #include "st_context.h"
48 #include "st_cb_fbo.h"
49 #include "st_cb_flush.h"
50 #include "st_cb_texture.h"
51 #include "st_format.h"
52 #include "st_texture.h"
53 #include "st_manager.h"
55 #include "util/u_format.h"
56 #include "util/u_inlines.h"
57 #include "util/u_surface.h"
61 st_renderbuffer_alloc_sw_storage(struct gl_context
* ctx
,
62 struct gl_renderbuffer
*rb
,
63 GLenum internalFormat
,
64 GLuint width
, GLuint height
)
66 struct pipe_screen
*screen
= st_context(ctx
)->pipe
->screen
;
67 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
68 enum pipe_format format
;
74 if (internalFormat
== GL_RGBA16_SNORM
) {
75 /* Special case for software accum buffers. Otherwise, if the
76 * call to st_choose_renderbuffer_format() fails (because the
77 * driver doesn't support signed 16-bit/channel colors) we'd
78 * just return without allocating the software accum buffer.
80 format
= PIPE_FORMAT_R16G16B16A16_SNORM
;
83 format
= st_choose_renderbuffer_format(screen
, internalFormat
, 0);
85 /* Not setting gl_renderbuffer::Format here will cause
86 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
88 if (format
== PIPE_FORMAT_NONE
) {
93 strb
->Base
.Format
= st_pipe_format_to_mesa_format(format
);
95 size
= _mesa_format_image_size(strb
->Base
.Format
, width
, height
, 1);
96 strb
->data
= malloc(size
);
97 return strb
->data
!= NULL
;
102 * gl_renderbuffer::AllocStorage()
103 * This is called to allocate the original drawing surface, and
104 * during window resize.
107 st_renderbuffer_alloc_storage(struct gl_context
* ctx
,
108 struct gl_renderbuffer
*rb
,
109 GLenum internalFormat
,
110 GLuint width
, GLuint height
)
112 struct st_context
*st
= st_context(ctx
);
113 struct pipe_context
*pipe
= st
->pipe
;
114 struct pipe_screen
*screen
= st
->pipe
->screen
;
115 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
116 enum pipe_format format
= PIPE_FORMAT_NONE
;
117 struct pipe_surface surf_tmpl
;
118 struct pipe_resource templ
;
120 /* init renderbuffer fields */
121 strb
->Base
.Width
= width
;
122 strb
->Base
.Height
= height
;
123 strb
->Base
._BaseFormat
= _mesa_base_fbo_format(ctx
, internalFormat
);
124 strb
->defined
= GL_FALSE
; /* undefined contents now */
126 if (strb
->software
) {
127 return st_renderbuffer_alloc_sw_storage(ctx
, rb
, internalFormat
,
131 /* Free the old surface and texture
133 pipe_surface_reference( &strb
->surface
, NULL
);
134 pipe_resource_reference( &strb
->texture
, NULL
);
136 /* Handle multisample renderbuffers first.
138 * From ARB_framebuffer_object:
139 * If <samples> is zero, then RENDERBUFFER_SAMPLES is set to zero.
140 * Otherwise <samples> represents a request for a desired minimum
141 * number of samples. Since different implementations may support
142 * different sample counts for multisampled rendering, the actual
143 * number of samples allocated for the renderbuffer image is
144 * implementation dependent. However, the resulting value for
145 * RENDERBUFFER_SAMPLES is guaranteed to be greater than or equal
146 * to <samples> and no more than the next larger sample count supported
147 * by the implementation.
149 * So let's find the supported number of samples closest to NumSamples.
150 * (NumSamples == 1) is treated the same as (NumSamples == 0).
152 if (rb
->NumSamples
> 1) {
155 for (i
= rb
->NumSamples
; i
<= ctx
->Const
.MaxSamples
; i
++) {
156 format
= st_choose_renderbuffer_format(screen
, internalFormat
, i
);
158 if (format
!= PIPE_FORMAT_NONE
) {
164 format
= st_choose_renderbuffer_format(screen
, internalFormat
, 0);
167 /* Not setting gl_renderbuffer::Format here will cause
168 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
170 if (format
== PIPE_FORMAT_NONE
) {
174 strb
->Base
.Format
= st_pipe_format_to_mesa_format(format
);
176 if (width
== 0 || height
== 0) {
177 /* if size is zero, nothing to allocate */
181 /* Setup new texture template.
183 memset(&templ
, 0, sizeof(templ
));
184 templ
.target
= st
->internal_target
;
185 templ
.format
= format
;
186 templ
.width0
= width
;
187 templ
.height0
= height
;
189 templ
.array_size
= 1;
190 templ
.nr_samples
= rb
->NumSamples
;
191 if (util_format_is_depth_or_stencil(format
)) {
192 templ
.bind
= PIPE_BIND_DEPTH_STENCIL
;
194 else if (strb
->Base
.Name
!= 0) {
195 /* this is a user-created renderbuffer */
196 templ
.bind
= PIPE_BIND_RENDER_TARGET
;
199 /* this is a window-system buffer */
200 templ
.bind
= (PIPE_BIND_DISPLAY_TARGET
|
201 PIPE_BIND_RENDER_TARGET
);
204 strb
->texture
= screen
->resource_create(screen
, &templ
);
209 u_surface_default_template(&surf_tmpl
, strb
->texture
, templ
.bind
);
210 strb
->surface
= pipe
->create_surface(pipe
,
214 assert(strb
->surface
->texture
);
215 assert(strb
->surface
->format
);
216 assert(strb
->surface
->width
== width
);
217 assert(strb
->surface
->height
== height
);
220 return strb
->surface
!= NULL
;
225 * gl_renderbuffer::Delete()
228 st_renderbuffer_delete(struct gl_renderbuffer
*rb
)
230 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
232 pipe_surface_reference(&strb
->surface
, NULL
);
233 pipe_resource_reference(&strb
->texture
, NULL
);
235 _mesa_delete_renderbuffer(rb
);
240 * Called via ctx->Driver.NewFramebuffer()
242 static struct gl_framebuffer
*
243 st_new_framebuffer(struct gl_context
*ctx
, GLuint name
)
245 /* XXX not sure we need to subclass gl_framebuffer for pipe */
246 return _mesa_new_framebuffer(ctx
, name
);
251 * Called via ctx->Driver.NewRenderbuffer()
253 static struct gl_renderbuffer
*
254 st_new_renderbuffer(struct gl_context
*ctx
, GLuint name
)
256 struct st_renderbuffer
*strb
= ST_CALLOC_STRUCT(st_renderbuffer
);
259 _mesa_init_renderbuffer(&strb
->Base
, name
);
260 strb
->Base
.Delete
= st_renderbuffer_delete
;
261 strb
->Base
.AllocStorage
= st_renderbuffer_alloc_storage
;
269 * Allocate a renderbuffer for a an on-screen window (not a user-created
270 * renderbuffer). The window system code determines the format.
272 struct gl_renderbuffer
*
273 st_new_renderbuffer_fb(enum pipe_format format
, int samples
, boolean sw
)
275 struct st_renderbuffer
*strb
;
277 strb
= ST_CALLOC_STRUCT(st_renderbuffer
);
279 _mesa_error(NULL
, GL_OUT_OF_MEMORY
, "creating renderbuffer");
283 _mesa_init_renderbuffer(&strb
->Base
, 0);
284 strb
->Base
.ClassID
= 0x4242; /* just a unique value */
285 strb
->Base
.NumSamples
= samples
;
286 strb
->Base
.Format
= st_pipe_format_to_mesa_format(format
);
287 strb
->Base
._BaseFormat
= _mesa_get_format_base_format(strb
->Base
.Format
);
291 case PIPE_FORMAT_R8G8B8A8_UNORM
:
292 case PIPE_FORMAT_B8G8R8A8_UNORM
:
293 case PIPE_FORMAT_A8R8G8B8_UNORM
:
294 strb
->Base
.InternalFormat
= GL_RGBA8
;
296 case PIPE_FORMAT_R8G8B8X8_UNORM
:
297 case PIPE_FORMAT_B8G8R8X8_UNORM
:
298 case PIPE_FORMAT_X8R8G8B8_UNORM
:
299 strb
->Base
.InternalFormat
= GL_RGB8
;
301 case PIPE_FORMAT_B5G5R5A1_UNORM
:
302 strb
->Base
.InternalFormat
= GL_RGB5_A1
;
304 case PIPE_FORMAT_B4G4R4A4_UNORM
:
305 strb
->Base
.InternalFormat
= GL_RGBA4
;
307 case PIPE_FORMAT_B5G6R5_UNORM
:
308 strb
->Base
.InternalFormat
= GL_RGB565
;
310 case PIPE_FORMAT_Z16_UNORM
:
311 strb
->Base
.InternalFormat
= GL_DEPTH_COMPONENT16
;
313 case PIPE_FORMAT_Z32_UNORM
:
314 strb
->Base
.InternalFormat
= GL_DEPTH_COMPONENT32
;
316 case PIPE_FORMAT_Z24_UNORM_S8_UINT
:
317 case PIPE_FORMAT_S8_UINT_Z24_UNORM
:
318 case PIPE_FORMAT_Z24X8_UNORM
:
319 case PIPE_FORMAT_X8Z24_UNORM
:
320 strb
->Base
.InternalFormat
= GL_DEPTH24_STENCIL8_EXT
;
322 case PIPE_FORMAT_S8_UINT
:
323 strb
->Base
.InternalFormat
= GL_STENCIL_INDEX8_EXT
;
325 case PIPE_FORMAT_R16G16B16A16_SNORM
:
327 strb
->Base
.InternalFormat
= GL_RGBA16_SNORM
;
329 case PIPE_FORMAT_R8_UNORM
:
330 strb
->Base
.InternalFormat
= GL_R8
;
332 case PIPE_FORMAT_R8G8_UNORM
:
333 strb
->Base
.InternalFormat
= GL_RG8
;
335 case PIPE_FORMAT_R16_UNORM
:
336 strb
->Base
.InternalFormat
= GL_R16
;
338 case PIPE_FORMAT_R16G16_UNORM
:
339 strb
->Base
.InternalFormat
= GL_RG16
;
341 case PIPE_FORMAT_R32G32B32A32_FLOAT
:
342 strb
->Base
.InternalFormat
= GL_RGBA32F
;
344 case PIPE_FORMAT_R16G16B16A16_FLOAT
:
345 strb
->Base
.InternalFormat
= GL_RGBA16F
;
349 "Unexpected format %s in st_new_renderbuffer_fb",
350 util_format_name(format
));
355 /* st-specific methods */
356 strb
->Base
.Delete
= st_renderbuffer_delete
;
357 strb
->Base
.AllocStorage
= st_renderbuffer_alloc_storage
;
359 /* surface is allocated in st_renderbuffer_alloc_storage() */
360 strb
->surface
= NULL
;
367 * Called via ctx->Driver.BindFramebufferEXT().
370 st_bind_framebuffer(struct gl_context
*ctx
, GLenum target
,
371 struct gl_framebuffer
*fb
, struct gl_framebuffer
*fbread
)
378 * Called by ctx->Driver.RenderTexture
381 st_render_texture(struct gl_context
*ctx
,
382 struct gl_framebuffer
*fb
,
383 struct gl_renderbuffer_attachment
*att
)
385 struct st_context
*st
= st_context(ctx
);
386 struct pipe_context
*pipe
= st
->pipe
;
387 struct st_renderbuffer
*strb
;
388 struct gl_renderbuffer
*rb
;
389 struct pipe_resource
*pt
;
390 struct st_texture_object
*stObj
;
391 const struct gl_texture_image
*texImage
;
392 struct pipe_surface surf_tmpl
;
394 if (!st_finalize_texture(ctx
, pipe
, att
->Texture
))
397 pt
= st_get_texobj_resource(att
->Texture
);
400 /* get pointer to texture image we're rendeing to */
401 texImage
= _mesa_get_attachment_teximage(att
);
403 /* create new renderbuffer which wraps the texture image.
404 * Use the texture's name as the renderbuffer's name so that we have
405 * something that's non-zero (to determine vertical orientation) and
406 * possibly helpful for debugging.
408 rb
= st_new_renderbuffer(ctx
, att
->Texture
->Name
);
410 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glFramebufferTexture()");
414 _mesa_reference_renderbuffer(&att
->Renderbuffer
, rb
);
415 assert(rb
->RefCount
== 1);
416 rb
->AllocStorage
= NULL
; /* should not get called */
417 strb
= st_renderbuffer(rb
);
419 assert(strb
->Base
.RefCount
> 0);
421 /* get the texture for the texture object */
422 stObj
= st_texture_object(att
->Texture
);
424 /* point renderbuffer at texobject */
426 strb
->rtt_level
= att
->TextureLevel
;
427 strb
->rtt_face
= att
->CubeMapFace
;
428 strb
->rtt_slice
= att
->Zoffset
;
430 rb
->Width
= texImage
->Width2
;
431 rb
->Height
= texImage
->Height2
;
432 rb
->_BaseFormat
= texImage
->_BaseFormat
;
433 rb
->InternalFormat
= texImage
->InternalFormat
;
435 pipe_resource_reference( &strb
->texture
, pt
);
437 pipe_surface_reference(&strb
->surface
, NULL
);
439 assert(strb
->rtt_level
<= strb
->texture
->last_level
);
441 /* new surface for rendering into the texture */
442 memset(&surf_tmpl
, 0, sizeof(surf_tmpl
));
443 surf_tmpl
.format
= ctx
->Color
.sRGBEnabled
444 ? strb
->texture
->format
: util_format_linear(strb
->texture
->format
);
445 surf_tmpl
.usage
= PIPE_BIND_RENDER_TARGET
;
446 surf_tmpl
.u
.tex
.level
= strb
->rtt_level
;
447 surf_tmpl
.u
.tex
.first_layer
= strb
->rtt_face
+ strb
->rtt_slice
;
448 surf_tmpl
.u
.tex
.last_layer
= strb
->rtt_face
+ strb
->rtt_slice
;
449 strb
->surface
= pipe
->create_surface(pipe
,
453 strb
->Base
.Format
= st_pipe_format_to_mesa_format(pt
->format
);
455 /* Invalidate buffer state so that the pipe's framebuffer state
457 * That's where the new renderbuffer (which we just created) gets
458 * passed to the pipe as a (color/depth) render target.
460 st_invalidate_state(ctx
, _NEW_BUFFERS
);
463 /* Need to trigger a call to update_framebuffer() since we just
464 * attached a new renderbuffer.
466 ctx
->NewState
|= _NEW_BUFFERS
;
471 * Called via ctx->Driver.FinishRenderTexture.
474 st_finish_render_texture(struct gl_context
*ctx
,
475 struct gl_renderbuffer_attachment
*att
)
477 struct st_renderbuffer
*strb
= st_renderbuffer(att
->Renderbuffer
);
484 /* restore previous framebuffer state */
485 st_invalidate_state(ctx
, _NEW_BUFFERS
);
491 st_fbo_invalid(const char *reason
)
493 if (MESA_DEBUG_FLAGS
& DEBUG_INCOMPLETE_FBO
) {
494 _mesa_debug(NULL
, "Invalid FBO: %s\n", reason
);
500 * Validate a renderbuffer attachment for a particular set of bindings.
503 st_validate_attachment(struct gl_context
*ctx
,
504 struct pipe_screen
*screen
,
505 const struct gl_renderbuffer_attachment
*att
,
508 const struct st_texture_object
*stObj
= st_texture_object(att
->Texture
);
509 enum pipe_format format
;
513 /* Only validate texture attachments for now, since
514 * st_renderbuffer_alloc_storage makes sure that
515 * the format is supported.
517 if (att
->Type
!= GL_TEXTURE
)
523 format
= stObj
->pt
->format
;
524 texFormat
= _mesa_get_attachment_teximage_const(att
)->TexFormat
;
526 /* If the encoding is sRGB and sRGB rendering cannot be enabled,
527 * check for linear format support instead.
528 * Later when we create a surface, we change the format to a linear one. */
529 if (!ctx
->Extensions
.EXT_framebuffer_sRGB
&&
530 _mesa_get_format_color_encoding(texFormat
) == GL_SRGB
) {
531 const gl_format linearFormat
= _mesa_get_srgb_format_linear(texFormat
);
532 format
= st_mesa_format_to_pipe_format(linearFormat
);
535 valid
= screen
->is_format_supported(screen
, format
,
537 stObj
->pt
->nr_samples
, bindings
);
539 st_fbo_invalid("Invalid format");
547 * Check if two renderbuffer attachments name a combined depth/stencil
551 st_is_depth_stencil_combined(const struct gl_renderbuffer_attachment
*depth
,
552 const struct gl_renderbuffer_attachment
*stencil
)
554 assert(depth
&& stencil
);
556 if (depth
->Type
== stencil
->Type
) {
557 if (depth
->Type
== GL_RENDERBUFFER_EXT
&&
558 depth
->Renderbuffer
== stencil
->Renderbuffer
)
561 if (depth
->Type
== GL_TEXTURE
&&
562 depth
->Texture
== stencil
->Texture
)
571 * Check that the framebuffer configuration is valid in terms of what
572 * the driver can support.
574 * For Gallium we only supports combined Z+stencil, not separate buffers.
577 st_validate_framebuffer(struct gl_context
*ctx
, struct gl_framebuffer
*fb
)
579 struct st_context
*st
= st_context(ctx
);
580 struct pipe_screen
*screen
= st
->pipe
->screen
;
581 const struct gl_renderbuffer_attachment
*depth
=
582 &fb
->Attachment
[BUFFER_DEPTH
];
583 const struct gl_renderbuffer_attachment
*stencil
=
584 &fb
->Attachment
[BUFFER_STENCIL
];
586 enum pipe_format first_format
= PIPE_FORMAT_NONE
;
587 boolean mixed_formats
=
588 screen
->get_param(screen
, PIPE_CAP_MIXED_COLORBUFFER_FORMATS
) != 0;
590 if (depth
->Type
&& stencil
->Type
&& depth
->Type
!= stencil
->Type
) {
591 st_fbo_invalid("Different Depth/Stencil buffer formats");
592 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
595 if (depth
->Type
== GL_RENDERBUFFER_EXT
&&
596 stencil
->Type
== GL_RENDERBUFFER_EXT
&&
597 depth
->Renderbuffer
!= stencil
->Renderbuffer
) {
598 st_fbo_invalid("Separate Depth/Stencil buffers");
599 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
602 if (depth
->Type
== GL_TEXTURE
&&
603 stencil
->Type
== GL_TEXTURE
&&
604 depth
->Texture
!= stencil
->Texture
) {
605 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
606 st_fbo_invalid("Different Depth/Stencil textures");
610 if (!st_validate_attachment(ctx
,
613 PIPE_BIND_DEPTH_STENCIL
)) {
614 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
617 if (!st_validate_attachment(ctx
,
620 PIPE_BIND_DEPTH_STENCIL
)) {
621 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
624 for (i
= 0; i
< ctx
->Const
.MaxColorAttachments
; i
++) {
625 struct gl_renderbuffer_attachment
*att
=
626 &fb
->Attachment
[BUFFER_COLOR0
+ i
];
627 enum pipe_format format
;
629 if (!st_validate_attachment(ctx
,
632 PIPE_BIND_RENDER_TARGET
)) {
633 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
637 if (!mixed_formats
) {
638 /* Disallow mixed formats. */
639 if (att
->Type
!= GL_NONE
) {
640 format
= st_renderbuffer(att
->Renderbuffer
)->surface
->format
;
645 if (first_format
== PIPE_FORMAT_NONE
) {
646 first_format
= format
;
647 } else if (format
!= first_format
) {
648 fb
->_Status
= GL_FRAMEBUFFER_UNSUPPORTED_EXT
;
649 st_fbo_invalid("Mixed color formats");
658 * Called via glDrawBuffer.
661 st_DrawBuffers(struct gl_context
*ctx
, GLsizei count
, const GLenum
*buffers
)
663 struct st_context
*st
= st_context(ctx
);
664 struct gl_framebuffer
*fb
= ctx
->DrawBuffer
;
670 /* add the renderbuffers on demand */
671 for (i
= 0; i
< fb
->_NumColorDrawBuffers
; i
++) {
672 gl_buffer_index idx
= fb
->_ColorDrawBufferIndexes
[i
];
673 st_manager_add_color_renderbuffer(st
, fb
, idx
);
679 * Called via glReadBuffer.
682 st_ReadBuffer(struct gl_context
*ctx
, GLenum buffer
)
684 struct st_context
*st
= st_context(ctx
);
685 struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
689 /* add the renderbuffer on demand */
690 st_manager_add_color_renderbuffer(st
, fb
, fb
->_ColorReadBufferIndex
);
696 * Called via ctx->Driver.MapRenderbuffer.
699 st_MapRenderbuffer(struct gl_context
*ctx
,
700 struct gl_renderbuffer
*rb
,
701 GLuint x
, GLuint y
, GLuint w
, GLuint h
,
703 GLubyte
**mapOut
, GLint
*rowStrideOut
)
705 struct st_context
*st
= st_context(ctx
);
706 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
707 struct pipe_context
*pipe
= st
->pipe
;
708 const GLboolean invert
= rb
->Name
== 0;
712 if (strb
->software
) {
713 /* software-allocated renderbuffer (probably an accum buffer) */
715 GLint bpp
= _mesa_get_format_bytes(strb
->Base
.Format
);
716 GLint stride
= _mesa_format_row_stride(strb
->Base
.Format
,
718 *mapOut
= (GLubyte
*) strb
->data
+ y
* stride
+ x
* bpp
;
719 *rowStrideOut
= stride
;
729 if (mode
& GL_MAP_READ_BIT
)
730 usage
|= PIPE_TRANSFER_READ
;
731 if (mode
& GL_MAP_WRITE_BIT
)
732 usage
|= PIPE_TRANSFER_WRITE
;
733 if (mode
& GL_MAP_INVALIDATE_RANGE_BIT
)
734 usage
|= PIPE_TRANSFER_DISCARD_RANGE
;
736 /* Note: y=0=bottom of buffer while y2=0=top of buffer.
737 * 'invert' will be true for window-system buffers and false for
738 * user-allocated renderbuffers and textures.
741 y2
= strb
->Base
.Height
- y
- h
;
745 strb
->transfer
= pipe_get_transfer(pipe
,
748 strb
->rtt_face
+ strb
->rtt_slice
,
750 if (strb
->transfer
) {
751 GLubyte
*map
= pipe_transfer_map(pipe
, strb
->transfer
);
753 *rowStrideOut
= -strb
->transfer
->stride
;
754 map
+= (h
- 1) * strb
->transfer
->stride
;
757 *rowStrideOut
= strb
->transfer
->stride
;
769 * Called via ctx->Driver.UnmapRenderbuffer.
772 st_UnmapRenderbuffer(struct gl_context
*ctx
,
773 struct gl_renderbuffer
*rb
)
775 struct st_context
*st
= st_context(ctx
);
776 struct st_renderbuffer
*strb
= st_renderbuffer(rb
);
777 struct pipe_context
*pipe
= st
->pipe
;
779 if (strb
->software
) {
780 /* software-allocated renderbuffer (probably an accum buffer) */
784 pipe_transfer_unmap(pipe
, strb
->transfer
);
785 pipe
->transfer_destroy(pipe
, strb
->transfer
);
786 strb
->transfer
= NULL
;
791 void st_init_fbo_functions(struct dd_function_table
*functions
)
793 #if FEATURE_EXT_framebuffer_object
794 functions
->NewFramebuffer
= st_new_framebuffer
;
795 functions
->NewRenderbuffer
= st_new_renderbuffer
;
796 functions
->BindFramebuffer
= st_bind_framebuffer
;
797 functions
->FramebufferRenderbuffer
= _mesa_framebuffer_renderbuffer
;
798 functions
->RenderTexture
= st_render_texture
;
799 functions
->FinishRenderTexture
= st_finish_render_texture
;
800 functions
->ValidateFramebuffer
= st_validate_framebuffer
;
803 functions
->DrawBuffers
= st_DrawBuffers
;
804 functions
->ReadBuffer
= st_ReadBuffer
;
806 functions
->MapRenderbuffer
= st_MapRenderbuffer
;
807 functions
->UnmapRenderbuffer
= st_UnmapRenderbuffer
;