| /************************************************************************** |
| * |
| * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR |
| * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| |
| /** |
| * Framebuffer/renderbuffer functions. |
| * |
| * \author Brian Paul |
| */ |
| |
| |
| #include "main/imports.h" |
| #include "main/context.h" |
| #include "main/fbobject.h" |
| #include "main/framebuffer.h" |
| #include "main/macros.h" |
| #include "main/mfeatures.h" |
| #include "main/renderbuffer.h" |
| |
| #include "pipe/p_context.h" |
| #include "pipe/p_defines.h" |
| #include "pipe/p_screen.h" |
| #include "st_context.h" |
| #include "st_cb_fbo.h" |
| #include "st_cb_flush.h" |
| #include "st_cb_texture.h" |
| #include "st_format.h" |
| #include "st_texture.h" |
| #include "st_manager.h" |
| |
| #include "util/u_format.h" |
| #include "util/u_inlines.h" |
| #include "util/u_surface.h" |
| |
| |
| static GLboolean |
| st_renderbuffer_alloc_sw_storage(struct gl_context * ctx, |
| struct gl_renderbuffer *rb, |
| GLenum internalFormat, |
| GLuint width, GLuint height) |
| { |
| struct pipe_screen *screen = st_context(ctx)->pipe->screen; |
| struct st_renderbuffer *strb = st_renderbuffer(rb); |
| enum pipe_format format; |
| size_t size; |
| |
| free(strb->data); |
| strb->data = NULL; |
| |
| if (internalFormat == GL_RGBA16_SNORM) { |
| /* Special case for software accum buffers. Otherwise, if the |
| * call to st_choose_renderbuffer_format() fails (because the |
| * driver doesn't support signed 16-bit/channel colors) we'd |
| * just return without allocating the software accum buffer. |
| */ |
| format = PIPE_FORMAT_R16G16B16A16_SNORM; |
| } |
| else { |
| format = st_choose_renderbuffer_format(screen, internalFormat, 0); |
| |
| /* Not setting gl_renderbuffer::Format here will cause |
| * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called. |
| */ |
| if (format == PIPE_FORMAT_NONE) { |
| return GL_TRUE; |
| } |
| } |
| |
| strb->Base.Format = st_pipe_format_to_mesa_format(format); |
| |
| size = _mesa_format_image_size(strb->Base.Format, width, height, 1); |
| strb->data = malloc(size); |
| return strb->data != NULL; |
| } |
| |
| |
| /** |
| * gl_renderbuffer::AllocStorage() |
| * This is called to allocate the original drawing surface, and |
| * during window resize. |
| */ |
| static GLboolean |
| st_renderbuffer_alloc_storage(struct gl_context * ctx, |
| struct gl_renderbuffer *rb, |
| GLenum internalFormat, |
| GLuint width, GLuint height) |
| { |
| struct st_context *st = st_context(ctx); |
| struct pipe_context *pipe = st->pipe; |
| struct pipe_screen *screen = st->pipe->screen; |
| struct st_renderbuffer *strb = st_renderbuffer(rb); |
| enum pipe_format format = PIPE_FORMAT_NONE; |
| struct pipe_surface surf_tmpl; |
| struct pipe_resource templ; |
| |
| /* init renderbuffer fields */ |
| strb->Base.Width = width; |
| strb->Base.Height = height; |
| strb->Base._BaseFormat = _mesa_base_fbo_format(ctx, internalFormat); |
| strb->defined = GL_FALSE; /* undefined contents now */ |
| |
| if (strb->software) { |
| return st_renderbuffer_alloc_sw_storage(ctx, rb, internalFormat, |
| width, height); |
| } |
| |
| /* Free the old surface and texture |
| */ |
| pipe_surface_reference( &strb->surface, NULL ); |
| pipe_resource_reference( &strb->texture, NULL ); |
| |
| /* Handle multisample renderbuffers first. |
| * |
| * From ARB_framebuffer_object: |
| * If <samples> is zero, then RENDERBUFFER_SAMPLES is set to zero. |
| * Otherwise <samples> represents a request for a desired minimum |
| * number of samples. Since different implementations may support |
| * different sample counts for multisampled rendering, the actual |
| * number of samples allocated for the renderbuffer image is |
| * implementation dependent. However, the resulting value for |
| * RENDERBUFFER_SAMPLES is guaranteed to be greater than or equal |
| * to <samples> and no more than the next larger sample count supported |
| * by the implementation. |
| * |
| * So let's find the supported number of samples closest to NumSamples. |
| * (NumSamples == 1) is treated the same as (NumSamples == 0). |
| */ |
| if (rb->NumSamples > 1) { |
| unsigned i; |
| |
| for (i = rb->NumSamples; i <= ctx->Const.MaxSamples; i++) { |
| format = st_choose_renderbuffer_format(screen, internalFormat, i); |
| |
| if (format != PIPE_FORMAT_NONE) { |
| rb->NumSamples = i; |
| break; |
| } |
| } |
| } else { |
| format = st_choose_renderbuffer_format(screen, internalFormat, 0); |
| } |
| |
| /* Not setting gl_renderbuffer::Format here will cause |
| * FRAMEBUFFER_UNSUPPORTED and ValidateFramebuffer will not be called. |
| */ |
| if (format == PIPE_FORMAT_NONE) { |
| return GL_TRUE; |
| } |
| |
| strb->Base.Format = st_pipe_format_to_mesa_format(format); |
| |
| if (width == 0 || height == 0) { |
| /* if size is zero, nothing to allocate */ |
| return GL_TRUE; |
| } |
| |
| /* Setup new texture template. |
| */ |
| memset(&templ, 0, sizeof(templ)); |
| templ.target = st->internal_target; |
| templ.format = format; |
| templ.width0 = width; |
| templ.height0 = height; |
| templ.depth0 = 1; |
| templ.array_size = 1; |
| templ.nr_samples = rb->NumSamples; |
| if (util_format_is_depth_or_stencil(format)) { |
| templ.bind = PIPE_BIND_DEPTH_STENCIL; |
| } |
| else if (strb->Base.Name != 0) { |
| /* this is a user-created renderbuffer */ |
| templ.bind = PIPE_BIND_RENDER_TARGET; |
| } |
| else { |
| /* this is a window-system buffer */ |
| templ.bind = (PIPE_BIND_DISPLAY_TARGET | |
| PIPE_BIND_RENDER_TARGET); |
| } |
| |
| strb->texture = screen->resource_create(screen, &templ); |
| |
| if (!strb->texture) |
| return FALSE; |
| |
| u_surface_default_template(&surf_tmpl, strb->texture, templ.bind); |
| strb->surface = pipe->create_surface(pipe, |
| strb->texture, |
| &surf_tmpl); |
| if (strb->surface) { |
| assert(strb->surface->texture); |
| assert(strb->surface->format); |
| assert(strb->surface->width == width); |
| assert(strb->surface->height == height); |
| } |
| |
| return strb->surface != NULL; |
| } |
| |
| |
| /** |
| * gl_renderbuffer::Delete() |
| */ |
| static void |
| st_renderbuffer_delete(struct gl_context *ctx, struct gl_renderbuffer *rb) |
| { |
| struct st_renderbuffer *strb = st_renderbuffer(rb); |
| if (ctx) { |
| struct st_context *st = st_context(ctx); |
| pipe_surface_release(st->pipe, &strb->surface); |
| } |
| pipe_resource_reference(&strb->texture, NULL); |
| free(strb->data); |
| _mesa_delete_renderbuffer(ctx, rb); |
| } |
| |
| |
| /** |
| * Called via ctx->Driver.NewFramebuffer() |
| */ |
| static struct gl_framebuffer * |
| st_new_framebuffer(struct gl_context *ctx, GLuint name) |
| { |
| /* XXX not sure we need to subclass gl_framebuffer for pipe */ |
| return _mesa_new_framebuffer(ctx, name); |
| } |
| |
| |
| /** |
| * Called via ctx->Driver.NewRenderbuffer() |
| */ |
| static struct gl_renderbuffer * |
| st_new_renderbuffer(struct gl_context *ctx, GLuint name) |
| { |
| struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer); |
| if (strb) { |
| assert(name != 0); |
| _mesa_init_renderbuffer(&strb->Base, name); |
| strb->Base.Delete = st_renderbuffer_delete; |
| strb->Base.AllocStorage = st_renderbuffer_alloc_storage; |
| return &strb->Base; |
| } |
| return NULL; |
| } |
| |
| |
| /** |
| * Allocate a renderbuffer for a an on-screen window (not a user-created |
| * renderbuffer). The window system code determines the format. |
| */ |
| struct gl_renderbuffer * |
| st_new_renderbuffer_fb(enum pipe_format format, int samples, boolean sw) |
| { |
| struct st_renderbuffer *strb; |
| |
| strb = ST_CALLOC_STRUCT(st_renderbuffer); |
| if (!strb) { |
| _mesa_error(NULL, GL_OUT_OF_MEMORY, "creating renderbuffer"); |
| return NULL; |
| } |
| |
| _mesa_init_renderbuffer(&strb->Base, 0); |
| strb->Base.ClassID = 0x4242; /* just a unique value */ |
| strb->Base.NumSamples = samples; |
| strb->Base.Format = st_pipe_format_to_mesa_format(format); |
| strb->Base._BaseFormat = _mesa_get_format_base_format(strb->Base.Format); |
| strb->software = sw; |
| |
| switch (format) { |
| case PIPE_FORMAT_R8G8B8A8_UNORM: |
| case PIPE_FORMAT_B8G8R8A8_UNORM: |
| case PIPE_FORMAT_A8R8G8B8_UNORM: |
| strb->Base.InternalFormat = GL_RGBA8; |
| break; |
| case PIPE_FORMAT_R8G8B8X8_UNORM: |
| case PIPE_FORMAT_B8G8R8X8_UNORM: |
| case PIPE_FORMAT_X8R8G8B8_UNORM: |
| strb->Base.InternalFormat = GL_RGB8; |
| break; |
| case PIPE_FORMAT_B5G5R5A1_UNORM: |
| strb->Base.InternalFormat = GL_RGB5_A1; |
| break; |
| case PIPE_FORMAT_B4G4R4A4_UNORM: |
| strb->Base.InternalFormat = GL_RGBA4; |
| break; |
| case PIPE_FORMAT_B5G6R5_UNORM: |
| strb->Base.InternalFormat = GL_RGB565; |
| break; |
| case PIPE_FORMAT_Z16_UNORM: |
| strb->Base.InternalFormat = GL_DEPTH_COMPONENT16; |
| break; |
| case PIPE_FORMAT_Z32_UNORM: |
| strb->Base.InternalFormat = GL_DEPTH_COMPONENT32; |
| break; |
| case PIPE_FORMAT_Z24_UNORM_S8_UINT: |
| case PIPE_FORMAT_S8_UINT_Z24_UNORM: |
| case PIPE_FORMAT_Z24X8_UNORM: |
| case PIPE_FORMAT_X8Z24_UNORM: |
| strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT; |
| break; |
| case PIPE_FORMAT_S8_UINT: |
| strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT; |
| break; |
| case PIPE_FORMAT_R16G16B16A16_SNORM: |
| /* accum buffer */ |
| strb->Base.InternalFormat = GL_RGBA16_SNORM; |
| break; |
| case PIPE_FORMAT_R8_UNORM: |
| strb->Base.InternalFormat = GL_R8; |
| break; |
| case PIPE_FORMAT_R8G8_UNORM: |
| strb->Base.InternalFormat = GL_RG8; |
| break; |
| case PIPE_FORMAT_R16_UNORM: |
| strb->Base.InternalFormat = GL_R16; |
| break; |
| case PIPE_FORMAT_R16G16_UNORM: |
| strb->Base.InternalFormat = GL_RG16; |
| break; |
| case PIPE_FORMAT_R32G32B32A32_FLOAT: |
| strb->Base.InternalFormat = GL_RGBA32F; |
| break; |
| case PIPE_FORMAT_R16G16B16A16_FLOAT: |
| strb->Base.InternalFormat = GL_RGBA16F; |
| break; |
| default: |
| _mesa_problem(NULL, |
| "Unexpected format %s in st_new_renderbuffer_fb", |
| util_format_name(format)); |
| free(strb); |
| return NULL; |
| } |
| |
| /* st-specific methods */ |
| strb->Base.Delete = st_renderbuffer_delete; |
| strb->Base.AllocStorage = st_renderbuffer_alloc_storage; |
| |
| /* surface is allocated in st_renderbuffer_alloc_storage() */ |
| strb->surface = NULL; |
| |
| return &strb->Base; |
| } |
| |
| |
| /** |
| * Called via ctx->Driver.BindFramebufferEXT(). |
| */ |
| static void |
| st_bind_framebuffer(struct gl_context *ctx, GLenum target, |
| struct gl_framebuffer *fb, struct gl_framebuffer *fbread) |
| { |
| /* no-op */ |
| } |
| |
| |
| /** |
| * Called by ctx->Driver.RenderTexture |
| */ |
| static void |
| st_render_texture(struct gl_context *ctx, |
| struct gl_framebuffer *fb, |
| struct gl_renderbuffer_attachment *att) |
| { |
| struct st_context *st = st_context(ctx); |
| struct pipe_context *pipe = st->pipe; |
| struct st_renderbuffer *strb; |
| struct gl_renderbuffer *rb; |
| struct pipe_resource *pt; |
| struct st_texture_object *stObj; |
| const struct gl_texture_image *texImage; |
| struct pipe_surface surf_tmpl; |
| |
| if (!st_finalize_texture(ctx, pipe, att->Texture)) |
| return; |
| |
| pt = st_get_texobj_resource(att->Texture); |
| assert(pt); |
| |
| /* get pointer to texture image we're rendeing to */ |
| texImage = _mesa_get_attachment_teximage(att); |
| |
| /* create new renderbuffer which wraps the texture image. |
| * Use the texture's name as the renderbuffer's name so that we have |
| * something that's non-zero (to determine vertical orientation) and |
| * possibly helpful for debugging. |
| */ |
| rb = st_new_renderbuffer(ctx, att->Texture->Name); |
| if (!rb) { |
| _mesa_error(ctx, GL_OUT_OF_MEMORY, "glFramebufferTexture()"); |
| return; |
| } |
| |
| _mesa_reference_renderbuffer(&att->Renderbuffer, rb); |
| assert(rb->RefCount == 1); |
| rb->AllocStorage = NULL; /* should not get called */ |
| strb = st_renderbuffer(rb); |
| |
| assert(strb->Base.RefCount > 0); |
| |
| /* get the texture for the texture object */ |
| stObj = st_texture_object(att->Texture); |
| |
| /* point renderbuffer at texobject */ |
| strb->rtt = stObj; |
| strb->rtt_level = att->TextureLevel; |
| strb->rtt_face = att->CubeMapFace; |
| strb->rtt_slice = att->Zoffset; |
| |
| rb->Width = texImage->Width2; |
| rb->Height = texImage->Height2; |
| rb->_BaseFormat = texImage->_BaseFormat; |
| rb->InternalFormat = texImage->InternalFormat; |
| |
| pipe_resource_reference( &strb->texture, pt ); |
| |
| pipe_surface_release(pipe, &strb->surface); |
| |
| assert(strb->rtt_level <= strb->texture->last_level); |
| |
| /* new surface for rendering into the texture */ |
| memset(&surf_tmpl, 0, sizeof(surf_tmpl)); |
| surf_tmpl.format = ctx->Color.sRGBEnabled |
| ? strb->texture->format : util_format_linear(strb->texture->format); |
| surf_tmpl.usage = PIPE_BIND_RENDER_TARGET; |
| surf_tmpl.u.tex.level = strb->rtt_level; |
| surf_tmpl.u.tex.first_layer = strb->rtt_face + strb->rtt_slice; |
| surf_tmpl.u.tex.last_layer = strb->rtt_face + strb->rtt_slice; |
| strb->surface = pipe->create_surface(pipe, |
| strb->texture, |
| &surf_tmpl); |
| |
| strb->Base.Format = st_pipe_format_to_mesa_format(pt->format); |
| |
| /* Invalidate buffer state so that the pipe's framebuffer state |
| * gets updated. |
| * That's where the new renderbuffer (which we just created) gets |
| * passed to the pipe as a (color/depth) render target. |
| */ |
| st_invalidate_state(ctx, _NEW_BUFFERS); |
| |
| |
| /* Need to trigger a call to update_framebuffer() since we just |
| * attached a new renderbuffer. |
| */ |
| ctx->NewState |= _NEW_BUFFERS; |
| } |
| |
| |
| /** |
| * Called via ctx->Driver.FinishRenderTexture. |
| */ |
| static void |
| st_finish_render_texture(struct gl_context *ctx, |
| struct gl_renderbuffer_attachment *att) |
| { |
| struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer); |
| |
| if (!strb) |
| return; |
| |
| strb->rtt = NULL; |
| |
| /* restore previous framebuffer state */ |
| st_invalidate_state(ctx, _NEW_BUFFERS); |
| } |
| |
| |
| /** Debug helper */ |
| static void |
| st_fbo_invalid(const char *reason) |
| { |
| if (MESA_DEBUG_FLAGS & DEBUG_INCOMPLETE_FBO) { |
| _mesa_debug(NULL, "Invalid FBO: %s\n", reason); |
| } |
| } |
| |
| |
| /** |
| * Validate a renderbuffer attachment for a particular set of bindings. |
| */ |
| static GLboolean |
| st_validate_attachment(struct gl_context *ctx, |
| struct pipe_screen *screen, |
| const struct gl_renderbuffer_attachment *att, |
| unsigned bindings) |
| { |
| const struct st_texture_object *stObj = st_texture_object(att->Texture); |
| enum pipe_format format; |
| gl_format texFormat; |
| GLboolean valid; |
| |
| /* Only validate texture attachments for now, since |
| * st_renderbuffer_alloc_storage makes sure that |
| * the format is supported. |
| */ |
| if (att->Type != GL_TEXTURE) |
| return GL_TRUE; |
| |
| if (!stObj) |
| return GL_FALSE; |
| |
| format = stObj->pt->format; |
| texFormat = _mesa_get_attachment_teximage_const(att)->TexFormat; |
| |
| /* If the encoding is sRGB and sRGB rendering cannot be enabled, |
| * check for linear format support instead. |
| * Later when we create a surface, we change the format to a linear one. */ |
| if (!ctx->Extensions.EXT_framebuffer_sRGB && |
| _mesa_get_format_color_encoding(texFormat) == GL_SRGB) { |
| const gl_format linearFormat = _mesa_get_srgb_format_linear(texFormat); |
| format = st_mesa_format_to_pipe_format(linearFormat); |
| } |
| |
| valid = screen->is_format_supported(screen, format, |
| PIPE_TEXTURE_2D, |
| stObj->pt->nr_samples, bindings); |
| if (!valid) { |
| st_fbo_invalid("Invalid format"); |
| } |
| |
| return valid; |
| } |
| |
| |
| /** |
| * Check if two renderbuffer attachments name a combined depth/stencil |
| * renderbuffer. |
| */ |
| GLboolean |
| st_is_depth_stencil_combined(const struct gl_renderbuffer_attachment *depth, |
| const struct gl_renderbuffer_attachment *stencil) |
| { |
| assert(depth && stencil); |
| |
| if (depth->Type == stencil->Type) { |
| if (depth->Type == GL_RENDERBUFFER_EXT && |
| depth->Renderbuffer == stencil->Renderbuffer) |
| return GL_TRUE; |
| |
| if (depth->Type == GL_TEXTURE && |
| depth->Texture == stencil->Texture) |
| return GL_TRUE; |
| } |
| |
| return GL_FALSE; |
| } |
| |
| |
| /** |
| * Check that the framebuffer configuration is valid in terms of what |
| * the driver can support. |
| * |
| * For Gallium we only supports combined Z+stencil, not separate buffers. |
| */ |
| static void |
| st_validate_framebuffer(struct gl_context *ctx, struct gl_framebuffer *fb) |
| { |
| struct st_context *st = st_context(ctx); |
| struct pipe_screen *screen = st->pipe->screen; |
| const struct gl_renderbuffer_attachment *depth = |
| &fb->Attachment[BUFFER_DEPTH]; |
| const struct gl_renderbuffer_attachment *stencil = |
| &fb->Attachment[BUFFER_STENCIL]; |
| GLuint i; |
| enum pipe_format first_format = PIPE_FORMAT_NONE; |
| boolean mixed_formats = |
| screen->get_param(screen, PIPE_CAP_MIXED_COLORBUFFER_FORMATS) != 0; |
| |
| if (depth->Type && stencil->Type && depth->Type != stencil->Type) { |
| st_fbo_invalid("Different Depth/Stencil buffer formats"); |
| fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; |
| return; |
| } |
| if (depth->Type == GL_RENDERBUFFER_EXT && |
| stencil->Type == GL_RENDERBUFFER_EXT && |
| depth->Renderbuffer != stencil->Renderbuffer) { |
| st_fbo_invalid("Separate Depth/Stencil buffers"); |
| fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; |
| return; |
| } |
| if (depth->Type == GL_TEXTURE && |
| stencil->Type == GL_TEXTURE && |
| depth->Texture != stencil->Texture) { |
| fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; |
| st_fbo_invalid("Different Depth/Stencil textures"); |
| return; |
| } |
| |
| if (!st_validate_attachment(ctx, |
| screen, |
| depth, |
| PIPE_BIND_DEPTH_STENCIL)) { |
| fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; |
| return; |
| } |
| if (!st_validate_attachment(ctx, |
| screen, |
| stencil, |
| PIPE_BIND_DEPTH_STENCIL)) { |
| fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; |
| return; |
| } |
| for (i = 0; i < ctx->Const.MaxColorAttachments; i++) { |
| struct gl_renderbuffer_attachment *att = |
| &fb->Attachment[BUFFER_COLOR0 + i]; |
| enum pipe_format format; |
| |
| if (!st_validate_attachment(ctx, |
| screen, |
| att, |
| PIPE_BIND_RENDER_TARGET)) { |
| fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; |
| return; |
| } |
| |
| if (!mixed_formats) { |
| /* Disallow mixed formats. */ |
| if (att->Type != GL_NONE) { |
| format = st_renderbuffer(att->Renderbuffer)->surface->format; |
| } else { |
| continue; |
| } |
| |
| if (first_format == PIPE_FORMAT_NONE) { |
| first_format = format; |
| } else if (format != first_format) { |
| fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; |
| st_fbo_invalid("Mixed color formats"); |
| return; |
| } |
| } |
| } |
| } |
| |
| |
| /** |
| * Called via glDrawBuffer. |
| */ |
| static void |
| st_DrawBuffers(struct gl_context *ctx, GLsizei count, const GLenum *buffers) |
| { |
| struct st_context *st = st_context(ctx); |
| struct gl_framebuffer *fb = ctx->DrawBuffer; |
| GLuint i; |
| |
| (void) count; |
| (void) buffers; |
| |
| /* add the renderbuffers on demand */ |
| for (i = 0; i < fb->_NumColorDrawBuffers; i++) { |
| gl_buffer_index idx = fb->_ColorDrawBufferIndexes[i]; |
| st_manager_add_color_renderbuffer(st, fb, idx); |
| } |
| } |
| |
| |
| /** |
| * Called via glReadBuffer. |
| */ |
| static void |
| st_ReadBuffer(struct gl_context *ctx, GLenum buffer) |
| { |
| struct st_context *st = st_context(ctx); |
| struct gl_framebuffer *fb = ctx->ReadBuffer; |
| |
| (void) buffer; |
| |
| /* add the renderbuffer on demand */ |
| st_manager_add_color_renderbuffer(st, fb, fb->_ColorReadBufferIndex); |
| } |
| |
| |
| |
| /** |
| * Called via ctx->Driver.MapRenderbuffer. |
| */ |
| static void |
| st_MapRenderbuffer(struct gl_context *ctx, |
| struct gl_renderbuffer *rb, |
| GLuint x, GLuint y, GLuint w, GLuint h, |
| GLbitfield mode, |
| GLubyte **mapOut, GLint *rowStrideOut) |
| { |
| struct st_context *st = st_context(ctx); |
| struct st_renderbuffer *strb = st_renderbuffer(rb); |
| struct pipe_context *pipe = st->pipe; |
| const GLboolean invert = rb->Name == 0; |
| unsigned usage; |
| GLuint y2; |
| |
| if (strb->software) { |
| /* software-allocated renderbuffer (probably an accum buffer) */ |
| if (strb->data) { |
| GLint bpp = _mesa_get_format_bytes(strb->Base.Format); |
| GLint stride = _mesa_format_row_stride(strb->Base.Format, |
| strb->Base.Width); |
| *mapOut = (GLubyte *) strb->data + y * stride + x * bpp; |
| *rowStrideOut = stride; |
| } |
| else { |
| *mapOut = NULL; |
| *rowStrideOut = 0; |
| } |
| return; |
| } |
| |
| usage = 0x0; |
| if (mode & GL_MAP_READ_BIT) |
| usage |= PIPE_TRANSFER_READ; |
| if (mode & GL_MAP_WRITE_BIT) |
| usage |= PIPE_TRANSFER_WRITE; |
| if (mode & GL_MAP_INVALIDATE_RANGE_BIT) |
| usage |= PIPE_TRANSFER_DISCARD_RANGE; |
| |
| /* Note: y=0=bottom of buffer while y2=0=top of buffer. |
| * 'invert' will be true for window-system buffers and false for |
| * user-allocated renderbuffers and textures. |
| */ |
| if (invert) |
| y2 = strb->Base.Height - y - h; |
| else |
| y2 = y; |
| |
| strb->transfer = pipe_get_transfer(pipe, |
| strb->texture, |
| strb->rtt_level, |
| strb->rtt_face + strb->rtt_slice, |
| usage, x, y2, w, h); |
| if (strb->transfer) { |
| GLubyte *map = pipe_transfer_map(pipe, strb->transfer); |
| if (invert) { |
| *rowStrideOut = -strb->transfer->stride; |
| map += (h - 1) * strb->transfer->stride; |
| } |
| else { |
| *rowStrideOut = strb->transfer->stride; |
| } |
| *mapOut = map; |
| } |
| else { |
| *mapOut = NULL; |
| *rowStrideOut = 0; |
| } |
| } |
| |
| |
| /** |
| * Called via ctx->Driver.UnmapRenderbuffer. |
| */ |
| static void |
| st_UnmapRenderbuffer(struct gl_context *ctx, |
| struct gl_renderbuffer *rb) |
| { |
| struct st_context *st = st_context(ctx); |
| struct st_renderbuffer *strb = st_renderbuffer(rb); |
| struct pipe_context *pipe = st->pipe; |
| |
| if (strb->software) { |
| /* software-allocated renderbuffer (probably an accum buffer) */ |
| return; |
| } |
| |
| pipe_transfer_unmap(pipe, strb->transfer); |
| pipe->transfer_destroy(pipe, strb->transfer); |
| strb->transfer = NULL; |
| } |
| |
| |
| |
| void st_init_fbo_functions(struct dd_function_table *functions) |
| { |
| #if FEATURE_EXT_framebuffer_object |
| functions->NewFramebuffer = st_new_framebuffer; |
| functions->NewRenderbuffer = st_new_renderbuffer; |
| functions->BindFramebuffer = st_bind_framebuffer; |
| functions->FramebufferRenderbuffer = _mesa_framebuffer_renderbuffer; |
| functions->RenderTexture = st_render_texture; |
| functions->FinishRenderTexture = st_finish_render_texture; |
| functions->ValidateFramebuffer = st_validate_framebuffer; |
| #endif |
| |
| functions->DrawBuffers = st_DrawBuffers; |
| functions->ReadBuffer = st_ReadBuffer; |
| |
| functions->MapRenderbuffer = st_MapRenderbuffer; |
| functions->UnmapRenderbuffer = st_UnmapRenderbuffer; |
| } |
| |
| |
