| // Copyright 2015 Google Inc. 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. |
| |
| #ifndef COBALT_RENDERER_BACKEND_EGL_TEXTURE_DATA_H_ |
| #define COBALT_RENDERER_BACKEND_EGL_TEXTURE_DATA_H_ |
| |
| #include <GLES2/gl2.h> |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "cobalt/math/size.h" |
| |
| namespace cobalt { |
| namespace renderer { |
| namespace backend { |
| |
| class GraphicsContextEGL; |
| |
| // All TextureDataEGL subclasses must also implement ConvertToTexture() to |
| // convert their pixel buffer data to a GL texture object and return the handle |
| // to it. After this method is called, the TextureData should be considered |
| // invalid. |
| class TextureDataEGL { |
| public: |
| virtual ~TextureDataEGL() {} |
| |
| virtual GLuint ConvertToTexture(GraphicsContextEGL* graphics_context, |
| bool bgra_supported) = 0; |
| // Returns information about the kind of data this TextureData is |
| // intended to store. |
| virtual const math::Size& GetSize() const = 0; |
| virtual GLenum GetFormat() const = 0; |
| |
| virtual int GetPitchInBytes() const = 0; |
| |
| // Returns a pointer to the image data so that one can set pixel data as |
| // necessary. |
| virtual uint8_t* GetMemory() = 0; |
| }; |
| |
| // Similar to TextureDataEGL::ConvertToTexture(), though this creates a texture |
| // without invalidating the RawTextureMemoryEGL object, so that multiple |
| // textures may be created through this data. |
| class RawTextureMemoryEGL { |
| public: |
| virtual ~RawTextureMemoryEGL() {} |
| |
| // Returns the allocated size of the texture memory. |
| virtual size_t GetSizeInBytes() const = 0; |
| |
| // Returns a CPU-accessible pointer to the allocated memory. |
| virtual uint8_t* GetMemory() = 0; |
| |
| virtual GLuint CreateTexture(GraphicsContextEGL* graphics_context, |
| intptr_t offset, const math::Size& size, |
| GLenum format, int pitch_in_bytes, |
| bool bgra_supported) const = 0; |
| |
| protected: |
| // Called within ConstRawTextureMemoryEGL's constructor to indicate that we |
| // are |
| // done modifying the contained data and that it should be frozen and made |
| // immutable at that point. For example, if using GLES3 PBOs, this would be a |
| // good time to call glUnmapBuffer() on the data. |
| virtual void MakeConst() = 0; |
| |
| friend class ConstRawTextureMemoryEGL; |
| }; |
| |
| // In order to allow the GPU to access raw texture memory, it must first be |
| // made immutable by constructing a ConstRawTextureMemoryEGL object from a |
| // RawTextureMemoryEGL object. This is so that we can guarantee that when the |
| // GPU starts reading it, the CPU will not be writing to it and possibly |
| // creating a race condition. |
| class ConstRawTextureMemoryEGL |
| : public base::RefCountedThreadSafe<ConstRawTextureMemoryEGL> { |
| public: |
| explicit ConstRawTextureMemoryEGL( |
| scoped_ptr<RawTextureMemoryEGL> raw_texture_memory) |
| : raw_texture_memory_(raw_texture_memory.Pass()) { |
| raw_texture_memory_->MakeConst(); |
| } |
| |
| const RawTextureMemoryEGL& raw_texture_memory() const { |
| return *raw_texture_memory_; |
| } |
| |
| size_t GetSizeInBytes() const { |
| return raw_texture_memory_->GetSizeInBytes(); |
| } |
| |
| private: |
| virtual ~ConstRawTextureMemoryEGL() {} |
| |
| scoped_ptr<RawTextureMemoryEGL> raw_texture_memory_; |
| |
| friend class base::RefCountedThreadSafe<ConstRawTextureMemoryEGL>; |
| }; |
| |
| void SetupInitialTextureParameters(); |
| |
| } // namespace backend |
| } // namespace renderer |
| } // namespace cobalt |
| |
| #endif // COBALT_RENDERER_BACKEND_EGL_TEXTURE_DATA_H_ |