| // |
| // Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| |
| // VertexBuffer.h: Defines the abstract VertexBuffer class and VertexBufferInterface |
| // class with derivations, classes that perform graphics API agnostic vertex buffer operations. |
| |
| #ifndef LIBGLESV2_RENDERER_VERTEXBUFFER_H_ |
| #define LIBGLESV2_RENDERER_VERTEXBUFFER_H_ |
| |
| #include "common/angleutils.h" |
| |
| namespace gl |
| { |
| class VertexAttribute; |
| } |
| |
| namespace rx |
| { |
| class Renderer; |
| |
| class VertexBuffer |
| { |
| public: |
| VertexBuffer(); |
| virtual ~VertexBuffer(); |
| |
| virtual bool initialize(unsigned int size, bool dynamicUsage) = 0; |
| |
| virtual bool storeVertexAttributes(const gl::VertexAttribute &attrib, GLint start, GLsizei count, |
| GLsizei instances, unsigned int offset) = 0; |
| virtual unsigned int getSpaceRequired(const gl::VertexAttribute &attrib, GLsizei count, |
| GLsizei instances) const = 0; |
| |
| virtual bool requiresConversion(const gl::VertexAttribute &attrib) const = 0; |
| |
| virtual unsigned int getBufferSize() const = 0; |
| virtual bool setBufferSize(unsigned int size) = 0; |
| virtual bool discard() = 0; |
| |
| unsigned int getSerial() const; |
| |
| protected: |
| void updateSerial(); |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(VertexBuffer); |
| |
| unsigned int mSerial; |
| static unsigned int mNextSerial; |
| }; |
| |
| class VertexBufferInterface |
| { |
| public: |
| VertexBufferInterface(rx::Renderer *renderer, bool dynamic); |
| virtual ~VertexBufferInterface(); |
| |
| void reserveVertexSpace(const gl::VertexAttribute &attribute, GLsizei count, GLsizei instances); |
| |
| unsigned int getBufferSize() const; |
| |
| unsigned int getSerial() const; |
| |
| virtual int storeVertexAttributes(const gl::VertexAttribute &attrib, GLint start, GLsizei count, GLsizei instances); |
| |
| VertexBuffer* getVertexBuffer() const; |
| |
| protected: |
| virtual bool reserveSpace(unsigned int size) = 0; |
| |
| unsigned int getWritePosition() const; |
| void setWritePosition(unsigned int writePosition); |
| |
| bool discard(); |
| |
| bool setBufferSize(unsigned int size); |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(VertexBufferInterface); |
| |
| rx::Renderer *const mRenderer; |
| |
| VertexBuffer* mVertexBuffer; |
| |
| unsigned int mWritePosition; |
| unsigned int mReservedSpace; |
| bool mDynamic; |
| }; |
| |
| class StreamingVertexBufferInterface : public VertexBufferInterface |
| { |
| public: |
| StreamingVertexBufferInterface(rx::Renderer *renderer, std::size_t initialSize); |
| ~StreamingVertexBufferInterface(); |
| |
| protected: |
| bool reserveSpace(unsigned int size); |
| }; |
| |
| class StaticVertexBufferInterface : public VertexBufferInterface |
| { |
| public: |
| explicit StaticVertexBufferInterface(rx::Renderer *renderer); |
| ~StaticVertexBufferInterface(); |
| |
| int storeVertexAttributes(const gl::VertexAttribute &attrib, GLint start, GLsizei count, GLsizei instances); |
| |
| // Returns the offset into the vertex buffer, or -1 if not found |
| int lookupAttribute(const gl::VertexAttribute &attribute); |
| |
| protected: |
| bool reserveSpace(unsigned int size); |
| |
| private: |
| struct VertexElement |
| { |
| GLenum type; |
| GLint size; |
| GLsizei stride; |
| bool normalized; |
| bool pureInteger; |
| int attributeOffset; |
| |
| unsigned int streamOffset; |
| }; |
| |
| std::vector<VertexElement> mCache; |
| }; |
| |
| } |
| |
| #endif // LIBGLESV2_RENDERER_VERTEXBUFFER_H_ |