/************************************************************************** * * 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/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_texture.h" #include "st_format.h" #include "st_public.h" #include "st_texture.h" /** * Compute the renderbuffer's Red/Green/EtcBit fields from the pipe format. */ static int init_renderbuffer_bits(struct st_renderbuffer *strb, enum pipe_format pipeFormat) { struct pipe_format_info info; if (!st_get_format_info( pipeFormat, &info )) { assert( 0 ); } strb->Base._ActualFormat = info.base_format; strb->Base.RedBits = info.red_bits; strb->Base.GreenBits = info.green_bits; strb->Base.BlueBits = info.blue_bits; strb->Base.AlphaBits = info.alpha_bits; strb->Base.DepthBits = info.depth_bits; strb->Base.StencilBits = info.stencil_bits; strb->Base.DataType = st_format_datatype(pipeFormat); return info.size; } /** * gl_renderbuffer::AllocStorage() * This is called to allocate the original drawing surface, and * during window resize. */ static GLboolean st_renderbuffer_alloc_storage(GLcontext * ctx, struct gl_renderbuffer *rb, GLenum internalFormat, GLuint width, GLuint height) { struct pipe_context *pipe = ctx->st->pipe; struct st_renderbuffer *strb = st_renderbuffer(rb); enum pipe_format format; if (strb->format != PIPE_FORMAT_NONE) format = strb->format; else format = st_choose_renderbuffer_format(pipe, internalFormat); /* init renderbuffer fields */ strb->Base.Width = width; strb->Base.Height = height; init_renderbuffer_bits(strb, format); strb->defined = GL_FALSE; /* undefined contents now */ if(strb->software) { struct pipe_format_block block; size_t size; _mesa_free(strb->data); assert(strb->format != PIPE_FORMAT_NONE); pf_get_block(strb->format, &block); strb->stride = pf_get_stride(&block, width); size = pf_get_2d_size(&block, strb->stride, height); strb->data = _mesa_malloc(size); return strb->data != NULL; } else { struct pipe_texture template; unsigned surface_usage; /* Free the old surface and texture */ pipe_surface_reference( &strb->surface, NULL ); pipe_texture_reference( &strb->texture, NULL ); /* Setup new texture template. */ memset(&template, 0, sizeof(template)); template.target = PIPE_TEXTURE_2D; template.format = format; pf_get_block(format, &template.block); template.width[0] = width; template.height[0] = height; template.depth[0] = 1; template.last_level = 0; template.nr_samples = rb->NumSamples; if (pf_is_depth_stencil(format)) { template.tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL; } else { template.tex_usage = (PIPE_TEXTURE_USAGE_DISPLAY_TARGET | PIPE_TEXTURE_USAGE_RENDER_TARGET); } /* Probably need dedicated flags for surface usage too: */ surface_usage = (PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE); #if 0 PIPE_BUFFER_USAGE_CPU_READ | PIPE_BUFFER_USAGE_CPU_WRITE); #endif strb->texture = pipe->screen->texture_create( pipe->screen, &template ); if (!strb->texture) return FALSE; strb->surface = pipe->screen->get_tex_surface( pipe->screen, strb->texture, 0, 0, 0, surface_usage ); 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_renderbuffer *rb) { struct st_renderbuffer *strb = st_renderbuffer(rb); ASSERT(strb); pipe_surface_reference(&strb->surface, NULL); pipe_texture_reference(&strb->texture, NULL); _mesa_free(strb->data); _mesa_free(strb); } /** * gl_renderbuffer::GetPointer() */ static void * null_get_pointer(GLcontext * ctx, struct gl_renderbuffer *rb, GLint x, GLint y) { /* By returning NULL we force all software rendering to go through * the span routines. */ #if 0 assert(0); /* Should never get called with softpipe */ #endif return NULL; } /** * Called via ctx->Driver.NewFramebuffer() */ static struct gl_framebuffer * st_new_framebuffer(GLcontext *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(GLcontext *ctx, GLuint name) { struct st_renderbuffer *strb = ST_CALLOC_STRUCT(st_renderbuffer); if (strb) { _mesa_init_renderbuffer(&strb->Base, name); strb->Base.Delete = st_renderbuffer_delete; strb->Base.AllocStorage = st_renderbuffer_alloc_storage; strb->Base.GetPointer = null_get_pointer; strb->format = PIPE_FORMAT_NONE; 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->format = format; init_renderbuffer_bits(strb, format); strb->software = sw; switch (format) { case PIPE_FORMAT_A8R8G8B8_UNORM: case PIPE_FORMAT_B8G8R8A8_UNORM: case PIPE_FORMAT_X8R8G8B8_UNORM: case PIPE_FORMAT_B8G8R8X8_UNORM: case PIPE_FORMAT_A1R5G5B5_UNORM: case PIPE_FORMAT_A4R4G4B4_UNORM: case PIPE_FORMAT_R5G6B5_UNORM: strb->Base.InternalFormat = GL_RGBA; strb->Base._BaseFormat = GL_RGBA; break; case PIPE_FORMAT_Z16_UNORM: strb->Base.InternalFormat = GL_DEPTH_COMPONENT16; strb->Base._BaseFormat = GL_DEPTH_COMPONENT; break; case PIPE_FORMAT_Z32_UNORM: strb->Base.InternalFormat = GL_DEPTH_COMPONENT32; strb->Base._BaseFormat = GL_DEPTH_COMPONENT; break; case PIPE_FORMAT_S8Z24_UNORM: case PIPE_FORMAT_Z24S8_UNORM: case PIPE_FORMAT_X8Z24_UNORM: case PIPE_FORMAT_Z24X8_UNORM: strb->Base.InternalFormat = GL_DEPTH24_STENCIL8_EXT; strb->Base._BaseFormat = GL_DEPTH_STENCIL_EXT; break; case PIPE_FORMAT_S8_UNORM: strb->Base.InternalFormat = GL_STENCIL_INDEX8_EXT; strb->Base._BaseFormat = GL_STENCIL_INDEX; break; case PIPE_FORMAT_R16G16B16A16_SNORM: strb->Base.InternalFormat = GL_RGBA16; strb->Base._BaseFormat = GL_RGBA; break; default: _mesa_problem(NULL, "Unexpected format in st_new_renderbuffer_fb"); _mesa_free(strb); return NULL; } /* st-specific methods */ strb->Base.Delete = st_renderbuffer_delete; strb->Base.AllocStorage = st_renderbuffer_alloc_storage; strb->Base.GetPointer = null_get_pointer; /* surface is allocated in st_renderbuffer_alloc_storage() */ strb->surface = NULL; return &strb->Base; } /** * Called via ctx->Driver.BindFramebufferEXT(). */ static void st_bind_framebuffer(GLcontext *ctx, GLenum target, struct gl_framebuffer *fb, struct gl_framebuffer *fbread) { } /** * Called by ctx->Driver.FramebufferRenderbuffer */ static void st_framebuffer_renderbuffer(GLcontext *ctx, struct gl_framebuffer *fb, GLenum attachment, struct gl_renderbuffer *rb) { /* XXX no need for derivation? */ _mesa_framebuffer_renderbuffer(ctx, fb, attachment, rb); } /** * Called by ctx->Driver.RenderTexture */ static void st_render_texture(GLcontext *ctx, struct gl_framebuffer *fb, struct gl_renderbuffer_attachment *att) { struct pipe_screen *screen = ctx->st->pipe->screen; struct st_renderbuffer *strb; struct gl_renderbuffer *rb; struct pipe_texture *pt = st_get_texobj_texture(att->Texture); struct st_texture_object *stObj; const struct gl_texture_image *texImage = att->Texture->Image[att->CubeMapFace][att->TextureLevel]; if (!pt) return; /* create new renderbuffer which wraps the texture image */ rb = st_new_renderbuffer(ctx, 0); 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; /*printf("***** render to texture level %d: %d x %d\n", att->TextureLevel, rb->Width, rb->Height);*/ /*printf("***** pipe texture %d x %d\n", pt->width[0], pt->height[0]);*/ pipe_texture_reference( &strb->texture, pt ); pipe_surface_reference(&strb->surface, NULL); /* new surface for rendering into the texture */ strb->surface = screen->get_tex_surface(screen, strb->texture, strb->rtt_face, strb->rtt_level, strb->rtt_slice, PIPE_BUFFER_USAGE_GPU_READ | PIPE_BUFFER_USAGE_GPU_WRITE); init_renderbuffer_bits(strb, pt->format); /* printf("RENDER TO TEXTURE obj=%p pt=%p surf=%p %d x %d\n", att->Texture, pt, strb->surface, rb->Width, rb->Height); */ /* 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); } /** * Called via ctx->Driver.FinishRenderTexture. */ static void st_finish_render_texture(GLcontext *ctx, struct gl_renderbuffer_attachment *att) { struct st_renderbuffer *strb = st_renderbuffer(att->Renderbuffer); if (!strb) return; st_flush( ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL ); if (strb->surface) pipe_surface_reference( &strb->surface, NULL ); strb->rtt = NULL; /* printf("FINISH RENDER TO TEXTURE surf=%p\n", strb->surface); */ _mesa_reference_renderbuffer(&att->Renderbuffer, NULL); /* restore previous framebuffer state */ st_invalidate_state(ctx, _NEW_BUFFERS); } /** * Validate a renderbuffer attachment for a particular usage. */ static GLboolean st_validate_attachment(struct pipe_screen *screen, const struct gl_renderbuffer_attachment *att, GLuint usage) { const struct st_texture_object *stObj = st_texture_object(att->Texture); /** * 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; return screen->is_format_supported(screen, stObj->pt->format, PIPE_TEXTURE_2D, usage, 0); } /** * 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(GLcontext *ctx, struct gl_framebuffer *fb) { struct pipe_screen *screen = ctx->st->pipe->screen; const struct gl_renderbuffer *depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer; const struct gl_renderbuffer *stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer; GLuint i; if (stencilRb && depthRb && stencilRb != depthRb) { fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; return; } if (!st_validate_attachment(screen, &fb->Attachment[BUFFER_DEPTH], PIPE_TEXTURE_USAGE_DEPTH_STENCIL)) { fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; return; } if (!st_validate_attachment(screen, &fb->Attachment[BUFFER_STENCIL], PIPE_TEXTURE_USAGE_DEPTH_STENCIL)) { fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; return; } for (i = 0; i < ctx->Const.MaxColorAttachments; i++) { if (!st_validate_attachment(screen, &fb->Attachment[BUFFER_COLOR0 + i], PIPE_TEXTURE_USAGE_RENDER_TARGET)) { fb->_Status = GL_FRAMEBUFFER_UNSUPPORTED_EXT; return; } } } /** * Copy back color buffer to front color buffer. */ static void copy_back_to_front(struct st_context *st, struct gl_framebuffer *fb, gl_buffer_index frontIndex, gl_buffer_index backIndex) { struct st_framebuffer *stfb = (struct st_framebuffer *) fb; struct pipe_surface *surf_front, *surf_back; (void) st_get_framebuffer_surface(stfb, frontIndex, &surf_front); (void) st_get_framebuffer_surface(stfb, backIndex, &surf_back); if (surf_front && surf_back) { st->pipe->surface_copy(st->pipe, surf_front, 0, 0, /* dest */ surf_back, 0, 0, /* src */ fb->Width, fb->Height); } } /** * Check if we're drawing into, or read from, a front color buffer. If the * front buffer is missing, create it now. * * The back color buffer must exist since we'll use its format/samples info * for creating the front buffer. * * \param frontIndex either BUFFER_FRONT_LEFT or BUFFER_FRONT_RIGHT * \param backIndex either BUFFER_BACK_LEFT or BUFFER_BACK_RIGHT */ static void check_create_front_buffer(GLcontext *ctx, struct gl_framebuffer *fb, gl_buffer_index frontIndex, gl_buffer_index backIndex) { if (fb->Attachment[frontIndex].Renderbuffer == NULL) { GLboolean create = GL_FALSE; /* check if drawing to or reading from front buffer */ if (fb->_ColorReadBufferIndex == frontIndex) { create = GL_TRUE; } else { GLuint b; for (b = 0; b < fb->_NumColorDrawBuffers; b++) { if (fb->_ColorDrawBufferIndexes[b] == frontIndex) { create = GL_TRUE; break; } } } if (create) { struct st_renderbuffer *back; struct gl_renderbuffer *front; enum pipe_format colorFormat; uint samples; if (0) _mesa_debug(ctx, "Allocate new front buffer\n"); /* get back renderbuffer info */ back = st_renderbuffer(fb->Attachment[backIndex].Renderbuffer); colorFormat = back->format; samples = back->Base.NumSamples; /* create front renderbuffer */ front = st_new_renderbuffer_fb(colorFormat, samples, FALSE); _mesa_add_renderbuffer(fb, frontIndex, front); /* alloc texture/surface for new front buffer */ front->AllocStorage(ctx, front, front->InternalFormat, fb->Width, fb->Height); /* initialize the front color buffer contents by copying * the back buffer. */ copy_back_to_front(ctx->st, fb, frontIndex, backIndex); } } } /** * If front left/right color buffers are missing, create them now. */ static void check_create_front_buffers(GLcontext *ctx, struct gl_framebuffer *fb) { /* check if we need to create the front left buffer now */ check_create_front_buffer(ctx, fb, BUFFER_FRONT_LEFT, BUFFER_BACK_LEFT); if (fb->Visual.stereoMode) { check_create_front_buffer(ctx, fb, BUFFER_FRONT_RIGHT, BUFFER_BACK_RIGHT); } st_invalidate_state(ctx, _NEW_BUFFERS); } /** * Called via glDrawBuffer. */ static void st_DrawBuffers(GLcontext *ctx, GLsizei count, const GLenum *buffers) { (void) count; (void) buffers; check_create_front_buffers(ctx, ctx->DrawBuffer); } /** * Called via glReadBuffer. */ static void st_ReadBuffer(GLcontext *ctx, GLenum buffer) { (void) buffer; check_create_front_buffers(ctx, ctx->ReadBuffer); } void st_init_fbo_functions(struct dd_function_table *functions) { functions->NewFramebuffer = st_new_framebuffer; functions->NewRenderbuffer = st_new_renderbuffer; functions->BindFramebuffer = st_bind_framebuffer; functions->FramebufferRenderbuffer = st_framebuffer_renderbuffer; functions->RenderTexture = st_render_texture; functions->FinishRenderTexture = st_finish_render_texture; functions->ValidateFramebuffer = st_validate_framebuffer; /* no longer needed by core Mesa, drivers handle resizes... functions->ResizeBuffers = st_resize_buffers; */ functions->DrawBuffers = st_DrawBuffers; functions->ReadBuffer = st_ReadBuffer; }