| // Copyright 2016 The SwiftShader Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // Framebuffer.cpp: Implements the Framebuffer class. Implements GL framebuffer |
| // objects and related functionality. |
| |
| #include "Framebuffer.h" |
| |
| #include "main.h" |
| #include "Renderbuffer.h" |
| #include "Texture.h" |
| #include "utilities.h" |
| |
| namespace gl |
| { |
| |
| Framebuffer::Framebuffer() |
| { |
| mColorbufferType = GL_NONE; |
| mDepthbufferType = GL_NONE; |
| mStencilbufferType = GL_NONE; |
| } |
| |
| Framebuffer::~Framebuffer() |
| { |
| mColorbufferPointer = nullptr; |
| mDepthbufferPointer = nullptr; |
| mStencilbufferPointer = nullptr; |
| } |
| |
| Renderbuffer *Framebuffer::lookupRenderbuffer(GLenum type, GLuint handle) const |
| { |
| Context *context = getContext(); |
| Renderbuffer *buffer = nullptr; |
| |
| if(type == GL_NONE) |
| { |
| buffer = nullptr; |
| } |
| else if(type == GL_RENDERBUFFER) |
| { |
| buffer = context->getRenderbuffer(handle); |
| } |
| else if(IsTextureTarget(type)) |
| { |
| buffer = context->getTexture(handle)->getRenderbuffer(type); |
| } |
| else UNREACHABLE(type); |
| |
| return buffer; |
| } |
| |
| void Framebuffer::setColorbuffer(GLenum type, GLuint colorbuffer) |
| { |
| mColorbufferType = (colorbuffer != 0) ? type : GL_NONE; |
| mColorbufferPointer = lookupRenderbuffer(type, colorbuffer); |
| } |
| |
| void Framebuffer::setDepthbuffer(GLenum type, GLuint depthbuffer) |
| { |
| mDepthbufferType = (depthbuffer != 0) ? type : GL_NONE; |
| mDepthbufferPointer = lookupRenderbuffer(type, depthbuffer); |
| } |
| |
| void Framebuffer::setStencilbuffer(GLenum type, GLuint stencilbuffer) |
| { |
| mStencilbufferType = (stencilbuffer != 0) ? type : GL_NONE; |
| mStencilbufferPointer = lookupRenderbuffer(type, stencilbuffer); |
| } |
| |
| void Framebuffer::detachTexture(GLuint texture) |
| { |
| if(mColorbufferPointer.name() == texture && IsTextureTarget(mColorbufferType)) |
| { |
| mColorbufferType = GL_NONE; |
| mColorbufferPointer = nullptr; |
| } |
| |
| if(mDepthbufferPointer.name() == texture && IsTextureTarget(mDepthbufferType)) |
| { |
| mDepthbufferType = GL_NONE; |
| mDepthbufferPointer = nullptr; |
| } |
| |
| if(mStencilbufferPointer.name() == texture && IsTextureTarget(mStencilbufferType)) |
| { |
| mStencilbufferType = GL_NONE; |
| mStencilbufferPointer = nullptr; |
| } |
| } |
| |
| void Framebuffer::detachRenderbuffer(GLuint renderbuffer) |
| { |
| if(mColorbufferPointer.name() == renderbuffer && mColorbufferType == GL_RENDERBUFFER) |
| { |
| mColorbufferType = GL_NONE; |
| mColorbufferPointer = nullptr; |
| } |
| |
| if(mDepthbufferPointer.name() == renderbuffer && mDepthbufferType == GL_RENDERBUFFER) |
| { |
| mDepthbufferType = GL_NONE; |
| mDepthbufferPointer = nullptr; |
| } |
| |
| if(mStencilbufferPointer.name() == renderbuffer && mStencilbufferType == GL_RENDERBUFFER) |
| { |
| mStencilbufferType = GL_NONE; |
| mStencilbufferPointer = nullptr; |
| } |
| } |
| |
| // Increments refcount on surface. |
| // caller must Release() the returned surface |
| Image *Framebuffer::getRenderTarget() |
| { |
| Renderbuffer *colorbuffer = mColorbufferPointer; |
| |
| if(colorbuffer) |
| { |
| return colorbuffer->getRenderTarget(); |
| } |
| |
| return nullptr; |
| } |
| |
| // Increments refcount on surface. |
| // caller must Release() the returned surface |
| Image *Framebuffer::getDepthStencil() |
| { |
| Renderbuffer *depthstencilbuffer = mDepthbufferPointer; |
| |
| if(!depthstencilbuffer) |
| { |
| depthstencilbuffer = mStencilbufferPointer; |
| } |
| |
| if(depthstencilbuffer) |
| { |
| return depthstencilbuffer->getRenderTarget(); |
| } |
| |
| return nullptr; |
| } |
| |
| Renderbuffer *Framebuffer::getColorbuffer() |
| { |
| return mColorbufferPointer; |
| } |
| |
| Renderbuffer *Framebuffer::getDepthbuffer() |
| { |
| return mDepthbufferPointer; |
| } |
| |
| Renderbuffer *Framebuffer::getStencilbuffer() |
| { |
| return mStencilbufferPointer; |
| } |
| |
| GLenum Framebuffer::getColorbufferType() |
| { |
| return mColorbufferType; |
| } |
| |
| GLenum Framebuffer::getDepthbufferType() |
| { |
| return mDepthbufferType; |
| } |
| |
| GLenum Framebuffer::getStencilbufferType() |
| { |
| return mStencilbufferType; |
| } |
| |
| GLuint Framebuffer::getColorbufferName() |
| { |
| return mColorbufferPointer.name(); |
| } |
| |
| GLuint Framebuffer::getDepthbufferName() |
| { |
| return mDepthbufferPointer.name(); |
| } |
| |
| GLuint Framebuffer::getStencilbufferName() |
| { |
| return mStencilbufferPointer.name(); |
| } |
| |
| bool Framebuffer::hasStencil() |
| { |
| if(mStencilbufferType != GL_NONE) |
| { |
| Renderbuffer *stencilbufferObject = getStencilbuffer(); |
| |
| if(stencilbufferObject) |
| { |
| return stencilbufferObject->getStencilSize() > 0; |
| } |
| } |
| |
| return false; |
| } |
| |
| GLenum Framebuffer::completeness() |
| { |
| int width; |
| int height; |
| int samples; |
| |
| return completeness(width, height, samples); |
| } |
| |
| GLenum Framebuffer::completeness(int &width, int &height, int &samples) |
| { |
| width = -1; |
| height = -1; |
| samples = -1; |
| |
| if(mColorbufferType != GL_NONE) |
| { |
| Renderbuffer *colorbuffer = getColorbuffer(); |
| |
| if(!colorbuffer) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(colorbuffer->getWidth() == 0 || colorbuffer->getHeight() == 0) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(mColorbufferType == GL_RENDERBUFFER) |
| { |
| if(!gl::IsColorRenderable(colorbuffer->getFormat())) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| } |
| else if(IsTextureTarget(mColorbufferType)) |
| { |
| GLenum format = colorbuffer->getFormat(); |
| |
| if(IsCompressed(format) || |
| format == GL_ALPHA || |
| format == GL_LUMINANCE || |
| format == GL_LUMINANCE_ALPHA) |
| { |
| return GL_FRAMEBUFFER_UNSUPPORTED; |
| } |
| |
| if(gl::IsDepthTexture(format) || gl::IsStencilTexture(format)) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| } |
| else |
| { |
| UNREACHABLE(mColorbufferType); |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| width = colorbuffer->getWidth(); |
| height = colorbuffer->getHeight(); |
| samples = colorbuffer->getSamples(); |
| } |
| |
| Renderbuffer *depthbuffer = nullptr; |
| Renderbuffer *stencilbuffer = nullptr; |
| |
| if(mDepthbufferType != GL_NONE) |
| { |
| depthbuffer = getDepthbuffer(); |
| |
| if(!depthbuffer) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(depthbuffer->getWidth() == 0 || depthbuffer->getHeight() == 0) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(mDepthbufferType == GL_RENDERBUFFER) |
| { |
| if(!gl::IsDepthRenderable(depthbuffer->getFormat())) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| } |
| else if(IsTextureTarget(mDepthbufferType)) |
| { |
| if(!gl::IsDepthTexture(depthbuffer->getFormat())) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| } |
| else |
| { |
| UNREACHABLE(mDepthbufferType); |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(width == -1 || height == -1) |
| { |
| width = depthbuffer->getWidth(); |
| height = depthbuffer->getHeight(); |
| samples = depthbuffer->getSamples(); |
| } |
| else if(width != depthbuffer->getWidth() || height != depthbuffer->getHeight()) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT; |
| } |
| else if(samples != depthbuffer->getSamples()) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT; |
| } |
| } |
| |
| if(mStencilbufferType != GL_NONE) |
| { |
| stencilbuffer = getStencilbuffer(); |
| |
| if(!stencilbuffer) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(stencilbuffer->getWidth() == 0 || stencilbuffer->getHeight() == 0) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(mStencilbufferType == GL_RENDERBUFFER) |
| { |
| if(!gl::IsStencilRenderable(stencilbuffer->getFormat())) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| } |
| else if(IsTextureTarget(mStencilbufferType)) |
| { |
| GLenum internalformat = stencilbuffer->getFormat(); |
| |
| if(!gl::IsStencilTexture(internalformat)) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| } |
| else |
| { |
| UNREACHABLE(mStencilbufferType); |
| return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT; |
| } |
| |
| if(width == -1 || height == -1) |
| { |
| width = stencilbuffer->getWidth(); |
| height = stencilbuffer->getHeight(); |
| samples = stencilbuffer->getSamples(); |
| } |
| else if(width != stencilbuffer->getWidth() || height != stencilbuffer->getHeight()) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT; |
| } |
| else if(samples != stencilbuffer->getSamples()) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE_EXT; |
| } |
| } |
| |
| // If we have both a depth and stencil buffer, they must refer to the same object |
| // since we only support packed_depth_stencil and not separate depth and stencil |
| if(depthbuffer && stencilbuffer && (depthbuffer != stencilbuffer)) |
| { |
| return GL_FRAMEBUFFER_UNSUPPORTED; |
| } |
| |
| // We need to have at least one attachment to be complete |
| if(width == -1 || height == -1) |
| { |
| return GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT; |
| } |
| |
| return GL_FRAMEBUFFER_COMPLETE; |
| } |
| |
| DefaultFramebuffer::DefaultFramebuffer(Colorbuffer *colorbuffer, DepthStencilbuffer *depthStencil) |
| { |
| mColorbufferPointer = new Renderbuffer(0, colorbuffer); |
| |
| Renderbuffer *depthStencilRenderbuffer = new Renderbuffer(0, depthStencil); |
| mDepthbufferPointer = depthStencilRenderbuffer; |
| mStencilbufferPointer = depthStencilRenderbuffer; |
| |
| mColorbufferType = GL_RENDERBUFFER; |
| mDepthbufferType = (depthStencilRenderbuffer->getDepthSize() != 0) ? GL_RENDERBUFFER : GL_NONE; |
| mStencilbufferType = (depthStencilRenderbuffer->getStencilSize() != 0) ? GL_RENDERBUFFER : GL_NONE; |
| } |
| |
| GLenum DefaultFramebuffer::completeness() |
| { |
| // The default framebuffer should always be complete |
| ASSERT(Framebuffer::completeness() == GL_FRAMEBUFFER_COMPLETE); |
| |
| return GL_FRAMEBUFFER_COMPLETE; |
| } |
| |
| } |