1 /**************************************************************************
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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/glformats.h"
41 #include "main/macros.h"
42 #include "main/renderbuffer.h"
43 #include "main/state.h"
45 #include "pipe/p_context.h"
46 #include "pipe/p_defines.h"
47 #include "pipe/p_screen.h"
49 #include "st_context.h"
50 #include "st_cb_fbo.h"
51 #include "st_cb_flush.h"
52 #include "st_cb_texture.h"
53 #include "st_format.h"
54 #include "st_texture.h"
55 #include "st_manager.h"
57 #include "util/u_format.h"
58 #include "util/u_inlines.h"
59 #include "util/u_surface.h"
63 st_renderbuffer_alloc_sw_storage(struct gl_context * ctx,
64 struct gl_renderbuffer *rb,
65 GLenum internalFormat,
66 GLuint width, GLuint height)
68 struct st_context *st = st_context(ctx);
69 struct st_renderbuffer *strb = st_renderbuffer(rb);
70 enum pipe_format format;
76 if (internalFormat == GL_RGBA16_SNORM) {
77 /* Special case for software accum buffers. Otherwise, if the
78 * call to st_choose_renderbuffer_format() fails (because the
79 * driver doesn't support signed 16-bit/channel colors) we'd
80 * just return without allocating the software accum buffer.
82 format = PIPE_FORMAT_R16G16B16A16_SNORM;
85 format = st_choose_renderbuffer_format(st, internalFormat, 0);
87 /* Not setting gl_renderbuffer::Format here will cause
88 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
90 if (format == PIPE_FORMAT_NONE) {
95 strb->Base.Format = st_pipe_format_to_mesa_format(format);
97 size = _mesa_format_image_size(strb->Base.Format, width, height, 1);
98 strb->data = malloc(size);
99 return strb->data != NULL;
104 * gl_renderbuffer::AllocStorage()
105 * This is called to allocate the original drawing surface, and
106 * during window resize.
109 st_renderbuffer_alloc_storage(struct gl_context * ctx,
110 struct gl_renderbuffer *rb,
111 GLenum internalFormat,
112 GLuint width, GLuint height)
114 struct st_context *st = st_context(ctx);
115 struct pipe_screen *screen = st->pipe->screen;
116 struct st_renderbuffer *strb = st_renderbuffer(rb);
117 enum pipe_format format = PIPE_FORMAT_NONE;
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_srgb, NULL);
134 pipe_surface_reference(&strb->surface_linear, NULL);
135 strb->surface = NULL;
136 pipe_resource_reference(&strb->texture, NULL);
138 /* If an sRGB framebuffer is unsupported, sRGB formats behave like linear
141 if (!ctx->Extensions.EXT_framebuffer_sRGB) {
142 internalFormat = _mesa_get_linear_internalformat(internalFormat);
145 /* Handle multisample renderbuffers first.
147 * From ARB_framebuffer_object:
148 * If <samples> is zero, then RENDERBUFFER_SAMPLES is set to zero.
149 * Otherwise <samples> represents a request for a desired minimum
150 * number of samples. Since different implementations may support
151 * different sample counts for multisampled rendering, the actual
152 * number of samples allocated for the renderbuffer image is
153 * implementation dependent. However, the resulting value for
154 * RENDERBUFFER_SAMPLES is guaranteed to be greater than or equal
155 * to <samples> and no more than the next larger sample count supported
156 * by the implementation.
158 * Find the supported number of samples >= rb->NumSamples
160 if (rb->NumSamples > 0) {
163 if (ctx->Const.MaxSamples > 1 && rb->NumSamples == 1) {
164 /* don't try num_samples = 1 with drivers that support real msaa */
167 start = rb->NumSamples;
170 for (i = start; i <= ctx->Const.MaxSamples; i++) {
171 format = st_choose_renderbuffer_format(st, internalFormat, i);
173 if (format != PIPE_FORMAT_NONE) {
179 format = st_choose_renderbuffer_format(st, internalFormat, 0);
182 /* Not setting gl_renderbuffer::Format here will cause
183 * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called.
185 if (format == PIPE_FORMAT_NONE) {
189 strb->Base.Format = st_pipe_format_to_mesa_format(format);
191 if (width == 0 || height == 0) {
192 /* if size is zero, nothing to allocate */
196 /* Setup new texture template.
198 memset(&templ, 0, sizeof(templ));
199 templ.target = st->internal_target;
200 templ.format = format;
201 templ.width0 = width;
202 templ.height0 = height;
204 templ.array_size = 1;
205 templ.nr_samples = rb->NumSamples;
206 if (util_format_is_depth_or_stencil(format)) {
207 templ.bind = PIPE_BIND_DEPTH_STENCIL;
209 else if (strb->Base.Name != 0) {
210 /* this is a user-created renderbuffer */
211 templ.bind = PIPE_BIND_RENDER_TARGET;
214 /* this is a window-system buffer */
215 templ.bind = (PIPE_BIND_DISPLAY_TARGET |
216 PIPE_BIND_RENDER_TARGET);
219 strb->texture = screen->resource_create(screen, &templ);
224 st_update_renderbuffer_surface(st, strb);
225 return strb->surface != NULL;
230 * gl_renderbuffer::Delete()
233 st_renderbuffer_delete(struct gl_context *ctx, struct gl_renderbuffer *rb)
235 struct st_renderbuffer *strb = st_renderbuffer(rb);
237 struct st_context *st = st_context(ctx);
238 pipe_surface_release(st->pipe, &strb->surface_srgb);
239 pipe_surface_release(st->pipe, &strb->surface_linear);
240 strb->surface = NULL;
242 pipe_resource_reference(&strb->texture, NULL);
244 _mesa_delete_renderbuffer(ctx, rb);
249 * Called via ctx->Driver.NewRenderbuffer()
251 static struct gl_renderbuffer *
252 st_new_renderbuffer(struct gl_context *ctx, GLuint name)
254 struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer);
257 _mesa_init_renderbuffer(&strb->Base, name);
258 strb->Base.Delete = st_renderbuffer_delete;
259 strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
267 * Allocate a renderbuffer for an on-screen window (not a user-created
268 * renderbuffer). The window system code determines the format.
270 struct gl_renderbuffer *
271 st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw)
273 struct st_renderbuffer *strb;
275 strb = ST_CALLOC_STRUCT(st_renderbuffer);
277 _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer");
281 _mesa_init_renderbuffer(&strb->Base, 0);
282 strb->Base.ClassID = 0x4242; /* just a unique value */
283 strb->Base.NumSamples = samples;
284 strb->Base.Format = st_pipe_format_to_mesa_format(format);
285 strb->Base._BaseFormat = _mesa_get_format_base_format(strb->Base.Format);
289 case PIPE_FORMAT_R8G8B8A8_UNORM:
290 case PIPE_FORMAT_B8G8R8A8_UNORM:
291 case PIPE_FORMAT_A8R8G8B8_UNORM:
292 strb->Base.InternalFormat = GL_RGBA8;
294 case PIPE_FORMAT_R8G8B8X8_UNORM:
295 case PIPE_FORMAT_B8G8R8X8_UNORM:
296 case PIPE_FORMAT_X8R8G8B8_UNORM:
297 strb->Base.InternalFormat = GL_RGB8;
299 case PIPE_FORMAT_R8G8B8A8_SRGB:
300 case PIPE_FORMAT_B8G8R8A8_SRGB:
301 case PIPE_FORMAT_A8R8G8B8_SRGB:
302 strb->Base.InternalFormat = GL_SRGB8_ALPHA8;
304 case PIPE_FORMAT_R8G8B8X8_SRGB:
305 case PIPE_FORMAT_B8G8R8X8_SRGB:
306 case PIPE_FORMAT_X8R8G8B8_SRGB:
307 strb->Base.InternalFormat = GL_SRGB8;
309 case PIPE_FORMAT_B5G5R5A1_UNORM:
310 strb->Base.InternalFormat = GL_RGB5_A1;
312 case PIPE_FORMAT_B4G4R4A4_UNORM:
313 strb->Base.InternalFormat = GL_RGBA4;
315 case PIPE_FORMAT_B5G6R5_UNORM:
316 strb->Base.InternalFormat = GL_RGB565;
318 case PIPE_FORMAT_Z16_UNORM:
319 strb->Base.InternalFormat = GL_DEPTH_COMPONENT16;
321 case PIPE_FORMAT_Z32_UNORM:
322 strb->Base.InternalFormat = GL_DEPTH_COMPONENT32;
324 case PIPE_FORMAT_Z24_UNORM_S8_UINT:
325 case PIPE_FORMAT_S8_UINT_Z24_UNORM:
326 strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT;
328 case PIPE_FORMAT_Z24X8_UNORM:
329 case PIPE_FORMAT_X8Z24_UNORM:
330 strb->Base.InternalFormat = GL_DEPTH_COMPONENT24;
332 case PIPE_FORMAT_S8_UINT:
333 strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT;
335 case PIPE_FORMAT_R16G16B16A16_SNORM:
337 strb->Base.InternalFormat = GL_RGBA16_SNORM;
339 case PIPE_FORMAT_R16G16B16A16_UNORM:
340 strb->Base.InternalFormat = GL_RGBA16;
342 case PIPE_FORMAT_R8_UNORM:
343 strb->Base.InternalFormat = GL_R8;
345 case PIPE_FORMAT_R8G8_UNORM:
346 strb->Base.InternalFormat = GL_RG8;
348 case PIPE_FORMAT_R16_UNORM:
349 strb->Base.InternalFormat = GL_R16;
351 case PIPE_FORMAT_R16G16_UNORM:
352 strb->Base.InternalFormat = GL_RG16;
354 case PIPE_FORMAT_R32G32B32A32_FLOAT:
355 strb->Base.InternalFormat = GL_RGBA32F;
357 case PIPE_FORMAT_R16G16B16A16_FLOAT:
358 strb->Base.InternalFormat = GL_RGBA16F;
362 "Unexpected format %s in st_new_renderbuffer_fb",
363 util_format_name(format));
368 /* st-specific methods */
369 strb->Base.Delete = st_renderbuffer_delete;
370 strb->Base.AllocStorage = st_renderbuffer_alloc_storage;
372 /* surface is allocated in st_renderbuffer_alloc_storage() */
373 strb->surface = NULL;
380 * Create or update the pipe_surface of a FBO renderbuffer.
381 * This is usually called after st_finalize_texture.
384 st_update_renderbuffer_surface(struct st_context *st,
385 struct st_renderbuffer *strb)
387 struct pipe_context *pipe = st->pipe;
388 struct pipe_resource *resource = strb->texture;
389 const struct st_texture_object *stTexObj = NULL;
390 unsigned rtt_width = strb->Base.Width;
391 unsigned rtt_height = strb->Base.Height;
392 unsigned rtt_depth = strb->Base.Depth;
395 * For winsys fbo, it is possible that the renderbuffer is sRGB-capable but
396 * the format of strb->texture is linear (because we have no control over
397 * the format). Check strb->Base.Format instead of strb->texture->format
398 * to determine if the rb is sRGB-capable.
400 boolean enable_srgb = st->ctx->Color.sRGBEnabled &&
401 _mesa_get_format_color_encoding(strb->Base.Format) == GL_SRGB;
402 enum pipe_format format = resource->format;
405 stTexObj = st_texture_object(strb->Base.TexImage->TexObject);
406 if (stTexObj->surface_based)
407 format = stTexObj->surface_format;
410 format = enable_srgb ? util_format_srgb(format) : util_format_linear(format);
412 if (resource->target == PIPE_TEXTURE_1D_ARRAY) {
413 rtt_depth = rtt_height;
417 /* find matching mipmap level size */
419 for (level = 0; level <= resource->last_level; level++) {
420 if (u_minify(resource->width0, level) == rtt_width &&
421 u_minify(resource->height0, level) == rtt_height &&
422 (resource->target != PIPE_TEXTURE_3D ||
423 u_minify(resource->depth0, level) == rtt_depth)) {
427 assert(level <= resource->last_level);
429 /* determine the layer bounds */
430 unsigned first_layer, last_layer;
431 if (strb->rtt_layered) {
433 last_layer = util_max_layer(strb->texture, level);
437 last_layer = strb->rtt_face + strb->rtt_slice;
440 /* Adjust for texture views */
441 if (strb->is_rtt && resource->array_size > 1 &&
442 stTexObj->base.Immutable) {
443 const struct gl_texture_object *tex = &stTexObj->base;
444 first_layer += tex->MinLayer;
445 if (!strb->rtt_layered)
446 last_layer += tex->MinLayer;
448 last_layer = MIN2(first_layer + tex->NumLayers - 1, last_layer);
451 struct pipe_surface **psurf =
452 enable_srgb ? &strb->surface_srgb : &strb->surface_linear;
453 struct pipe_surface *surf = *psurf;
456 surf->texture->nr_samples != strb->Base.NumSamples ||
457 surf->format != format ||
458 surf->texture != resource ||
459 surf->width != rtt_width ||
460 surf->height != rtt_height ||
461 surf->u.tex.level != level ||
462 surf->u.tex.first_layer != first_layer ||
463 surf->u.tex.last_layer != last_layer) {
464 /* create a new pipe_surface */
465 struct pipe_surface surf_tmpl;
466 memset(&surf_tmpl, 0, sizeof(surf_tmpl));
467 surf_tmpl.format = format;
468 surf_tmpl.u.tex.level = level;
469 surf_tmpl.u.tex.first_layer = first_layer;
470 surf_tmpl.u.tex.last_layer = last_layer;
472 pipe_surface_release(pipe, psurf);
474 *psurf = pipe->create_surface(pipe, resource, &surf_tmpl);
476 strb->surface = *psurf;
481 * Return the pipe_resource which stores a particular texture image.
483 static struct pipe_resource *
484 get_teximage_resource(struct gl_texture_object *texObj,
485 unsigned face, unsigned level)
487 struct st_texture_image *stImg =
488 st_texture_image(texObj->Image[face][level]);
495 * Called by ctx->Driver.RenderTexture
498 st_render_texture(struct gl_context *ctx,
499 struct gl_framebuffer *fb,
500 struct gl_renderbuffer_attachment *att)
502 struct st_context *st = st_context(ctx);
503 struct pipe_context *pipe = st->pipe;
504 struct gl_renderbuffer *rb = att->Renderbuffer;
505 struct st_renderbuffer *strb = st_renderbuffer(rb);
506 struct pipe_resource *pt;
508 if (!st_finalize_texture(ctx, pipe, att->Texture, att->CubeMapFace))
511 pt = get_teximage_resource(att->Texture,
516 /* point renderbuffer at texobject */
518 strb->rtt_face = att->CubeMapFace;
519 strb->rtt_slice = att->Zoffset;
520 strb->rtt_layered = att->Layered;
521 pipe_resource_reference(&strb->texture, pt);
523 st_update_renderbuffer_surface(st, strb);
525 /* Invalidate buffer state so that the pipe's framebuffer state
527 * That's where the new renderbuffer (which we just created) gets
528 * passed to the pipe as a (color/depth) render target.
530 st_invalidate_buffers(st);
533 /* Need to trigger a call to update_framebuffer() since we just
534 * attached a new renderbuffer.
536 ctx->NewState |= _NEW_BUFFERS;
541 * Called via ctx->Driver.FinishRenderTexture.
544 st_finish_render_texture(struct gl_context *ctx, struct gl_renderbuffer *rb)
546 struct st_context *st = st_context(ctx);
547 struct st_renderbuffer *strb = st_renderbuffer(rb);
552 strb->is_rtt = FALSE;
554 /* restore previous framebuffer state */
555 st_invalidate_buffers(st);
561 st_fbo_invalid(const char *reason)
563 if (MESA_DEBUG_FLAGS & DEBUG_INCOMPLETE_FBO) {
564 _mesa_debug(NULL, "Invalid FBO: %s\n", reason);
570 * Validate a renderbuffer attachment for a particular set of bindings.
573 st_validate_attachment(struct gl_context *ctx,
574 struct pipe_screen *screen,
575 const struct gl_renderbuffer_attachment *att,
578 const struct st_texture_object *stObj = st_texture_object(att->Texture);
579 enum pipe_format format;
580 mesa_format texFormat;
583 /* Sanity check: we must be binding the surface as a (color) render target
584 * or depth/stencil target.
586 assert(bindings == PIPE_BIND_RENDER_TARGET ||
587 bindings == PIPE_BIND_DEPTH_STENCIL);
589 /* Only validate texture attachments for now, since
590 * st_renderbuffer_alloc_storage makes sure that
591 * the format is supported.
593 if (att->Type != GL_TEXTURE)
596 if (!stObj || !stObj->pt)
599 format = stObj->pt->format;
600 texFormat = att->Renderbuffer->TexImage->TexFormat;
602 /* If the encoding is sRGB and sRGB rendering cannot be enabled,
603 * check for linear format support instead.
604 * Later when we create a surface, we change the format to a linear one. */
605 if (!ctx->Extensions.EXT_framebuffer_sRGB &&
606 _mesa_get_format_color_encoding(texFormat) == GL_SRGB) {
607 const mesa_format linearFormat = _mesa_get_srgb_format_linear(texFormat);
608 format = st_mesa_format_to_pipe_format(st_context(ctx), linearFormat);
611 valid = screen->is_format_supported(screen, format,
613 stObj->pt->nr_samples, bindings);
615 st_fbo_invalid("Invalid format");
623 * Check that the framebuffer configuration is valid in terms of what
624 * the driver can support.
626 * For Gallium we only supports combined Z+stencil, not separate buffers.
629 st_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb)
631 struct st_context *st = st_context(ctx);
632 struct pipe_screen *screen = st->pipe->screen;
633 const struct gl_renderbuffer_attachment *depth =
634 &fb->Attachment[BUFFER_DEPTH];
635 const struct gl_renderbuffer_attachment *stencil =
636 &fb->Attachment[BUFFER_STENCIL];
638 enum pipe_format first_format = PIPE_FORMAT_NONE;
639 boolean mixed_formats =
640 screen->get_param(screen, PIPE_CAP_MIXED_COLORBUFFER_FORMATS) != 0;
642 if (depth->Type && stencil->Type && depth->Type != stencil->Type) {
643 st_fbo_invalid("Different Depth/Stencil buffer formats");
644 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
647 if (depth->Type == GL_RENDERBUFFER_EXT &&
648 stencil->Type == GL_RENDERBUFFER_EXT &&
649 depth->Renderbuffer != stencil->Renderbuffer) {
650 st_fbo_invalid("Separate Depth/Stencil buffers");
651 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
654 if (depth->Type == GL_TEXTURE &&
655 stencil->Type == GL_TEXTURE &&
656 depth->Texture != stencil->Texture) {
657 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
658 st_fbo_invalid("Different Depth/Stencil textures");
662 if (!st_validate_attachment(ctx, screen, depth, PIPE_BIND_DEPTH_STENCIL)) {
663 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
664 st_fbo_invalid("Invalid depth attachment");
667 if (!st_validate_attachment(ctx, screen, stencil, PIPE_BIND_DEPTH_STENCIL)) {
668 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
669 st_fbo_invalid("Invalid stencil attachment");
672 for (i = 0; i < ctx->Const.MaxColorAttachments; i++) {
673 struct gl_renderbuffer_attachment *att =
674 &fb->Attachment[BUFFER_COLOR0 + i];
675 enum pipe_format format;
677 if (!st_validate_attachment(ctx, screen, att, PIPE_BIND_RENDER_TARGET)) {
678 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
679 st_fbo_invalid("Invalid color attachment");
683 if (!mixed_formats) {
684 /* Disallow mixed formats. */
685 if (att->Type != GL_NONE) {
686 format = st_renderbuffer(att->Renderbuffer)->surface->format;
691 if (first_format == PIPE_FORMAT_NONE) {
692 first_format = format;
693 } else if (format != first_format) {
694 fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT;
695 st_fbo_invalid("Mixed color formats");
704 * Called via glDrawBuffer. We only provide this driver function so that we
705 * can check if we need to allocate a new renderbuffer. Specifically, we
706 * don't usually allocate a front color buffer when using a double-buffered
707 * visual. But if the app calls glDrawBuffer(GL_FRONT) we need to allocate
708 * that buffer. Note, this is only for window system buffers, not user-
712 st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers)
714 struct st_context *st = st_context(ctx);
715 struct gl_framebuffer *fb = ctx->DrawBuffer;
720 if (_mesa_is_winsys_fbo(fb)) {
722 /* add the renderbuffers on demand */
723 for (i = 0; i < fb->_NumColorDrawBuffers; i++) {
724 GLint idx = fb->_ColorDrawBufferIndexes[i];
727 st_manager_add_color_renderbuffer(st, fb, idx);
735 * Called via glReadBuffer. As with st_DrawBuffers, we use this function
736 * to check if we need to allocate a renderbuffer on demand.
739 st_ReadBuffer(struct gl_context *ctx, GLenum buffer)
741 struct st_context *st = st_context(ctx);
742 struct gl_framebuffer *fb = ctx->ReadBuffer;
746 /* Check if we need to allocate a front color buffer.
747 * Front buffers are often allocated on demand (other color buffers are
748 * always allocated in advance).
750 if ((fb->_ColorReadBufferIndex == BUFFER_FRONT_LEFT ||
751 fb->_ColorReadBufferIndex == BUFFER_FRONT_RIGHT) &&
752 fb->Attachment[fb->_ColorReadBufferIndex].Type == GL_NONE) {
753 assert(_mesa_is_winsys_fbo(fb));
755 st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex);
756 _mesa_update_state(ctx);
757 st_validate_state(st, ST_PIPELINE_UPDATE_FRAMEBUFFER);
764 * Called via ctx->Driver.MapRenderbuffer.
767 st_MapRenderbuffer(struct gl_context *ctx,
768 struct gl_renderbuffer *rb,
769 GLuint x, GLuint y, GLuint w, GLuint h,
771 GLubyte **mapOut, GLint *rowStrideOut)
773 struct st_context *st = st_context(ctx);
774 struct st_renderbuffer *strb = st_renderbuffer(rb);
775 struct pipe_context *pipe = st->pipe;
776 const GLboolean invert = rb->Name == 0;
781 if (strb->software) {
782 /* software-allocated renderbuffer (probably an accum buffer) */
784 GLint bpp = _mesa_get_format_bytes(strb->Base.Format);
785 GLint stride = _mesa_format_row_stride(strb->Base.Format,
787 *mapOut = (GLubyte *) strb->data + y * stride + x * bpp;
788 *rowStrideOut = stride;
798 if (mode & GL_MAP_READ_BIT)
799 usage |= PIPE_TRANSFER_READ;
800 if (mode & GL_MAP_WRITE_BIT)
801 usage |= PIPE_TRANSFER_WRITE;
802 if (mode & GL_MAP_INVALIDATE_RANGE_BIT)
803 usage |= PIPE_TRANSFER_DISCARD_RANGE;
805 /* Note: y=0=bottom of buffer while y2=0=top of buffer.
806 * 'invert' will be true for window-system buffers and false for
807 * user-allocated renderbuffers and textures.
810 y2 = strb->Base.Height - y - h;
814 map = pipe_transfer_map(pipe,
816 strb->surface->u.tex.level,
817 strb->surface->u.tex.first_layer,
818 usage, x, y2, w, h, &strb->transfer);
821 *rowStrideOut = -(int) strb->transfer->stride;
822 map += (h - 1) * strb->transfer->stride;
825 *rowStrideOut = strb->transfer->stride;
837 * Called via ctx->Driver.UnmapRenderbuffer.
840 st_UnmapRenderbuffer(struct gl_context *ctx,
841 struct gl_renderbuffer *rb)
843 struct st_context *st = st_context(ctx);
844 struct st_renderbuffer *strb = st_renderbuffer(rb);
845 struct pipe_context *pipe = st->pipe;
847 if (strb->software) {
848 /* software-allocated renderbuffer (probably an accum buffer) */
852 pipe_transfer_unmap(pipe, strb->transfer);
853 strb->transfer = NULL;
859 st_init_fbo_functions(struct dd_function_table *functions)
861 functions->NewFramebuffer = _mesa_new_framebuffer;
862 functions->NewRenderbuffer = st_new_renderbuffer;
863 functions->FramebufferRenderbuffer = _mesa_FramebufferRenderbuffer_sw;
864 functions->RenderTexture = st_render_texture;
865 functions->FinishRenderTexture = st_finish_render_texture;
866 functions->ValidateFramebuffer = st_validate_framebuffer;
868 functions->DrawBuffers = st_DrawBuffers;
869 functions->ReadBuffer = st_ReadBuffer;
871 functions->MapRenderbuffer = st_MapRenderbuffer;
872 functions->UnmapRenderbuffer = st_UnmapRenderbuffer;