| // |
| // 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. |
| // |
| |
| // IndexBuffer.h: Defines the abstract IndexBuffer class and IndexBufferInterface |
| // class with derivations, classes that perform graphics API agnostic index buffer operations. |
| |
| #ifndef LIBGLESV2_RENDERER_INDEXBUFFER_H_ |
| #define LIBGLESV2_RENDERER_INDEXBUFFER_H_ |
| |
| #define GL_APICALL |
| #include <GLES2/gl2.h> |
| |
| #include "libGLESv2/Context.h" |
| #include "libGLESv2/renderer/Renderer.h" |
| |
| namespace rx |
| { |
| |
| class IndexBuffer |
| { |
| public: |
| IndexBuffer(); |
| virtual ~IndexBuffer(); |
| |
| virtual bool initialize(unsigned int bufferSize, GLenum indexType, bool dynamic) = 0; |
| |
| virtual bool mapBuffer(unsigned int offset, unsigned int size, void** outMappedMemory) = 0; |
| virtual bool unmapBuffer() = 0; |
| |
| virtual bool discard() = 0; |
| |
| virtual GLenum getIndexType() const = 0; |
| virtual unsigned int getBufferSize() const = 0; |
| virtual bool setSize(unsigned int bufferSize, GLenum indexType) = 0; |
| |
| unsigned int getSerial() const; |
| |
| protected: |
| void updateSerial(); |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(IndexBuffer); |
| |
| unsigned int mSerial; |
| static unsigned int mNextSerial; |
| }; |
| |
| class IndexBufferInterface |
| { |
| public: |
| IndexBufferInterface(Renderer *renderer, bool dynamic); |
| virtual ~IndexBufferInterface(); |
| |
| virtual bool reserveBufferSpace(unsigned int size, GLenum indexType) = 0; |
| |
| GLenum getIndexType() const; |
| unsigned int getBufferSize() const; |
| |
| unsigned int getSerial() const; |
| |
| int mapBuffer(unsigned int size, void** outMappedMemory); |
| bool unmapBuffer(); |
| |
| IndexBuffer *getIndexBuffer() const; |
| |
| protected: |
| unsigned int getWritePosition() const; |
| void setWritePosition(unsigned int writePosition); |
| |
| bool discard(); |
| |
| bool setBufferSize(unsigned int bufferSize, GLenum indexType); |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(IndexBufferInterface); |
| |
| rx::Renderer *const mRenderer; |
| |
| IndexBuffer* mIndexBuffer; |
| |
| unsigned int mWritePosition; |
| bool mDynamic; |
| }; |
| |
| class StreamingIndexBufferInterface : public IndexBufferInterface |
| { |
| public: |
| StreamingIndexBufferInterface(Renderer *renderer); |
| ~StreamingIndexBufferInterface(); |
| |
| virtual bool reserveBufferSpace(unsigned int size, GLenum indexType); |
| }; |
| |
| class StaticIndexBufferInterface : public IndexBufferInterface |
| { |
| public: |
| explicit StaticIndexBufferInterface(Renderer *renderer); |
| ~StaticIndexBufferInterface(); |
| |
| virtual bool reserveBufferSpace(unsigned int size, GLenum indexType); |
| |
| UINT lookupRange(intptr_t offset, GLsizei count, UINT *minIndex, UINT *maxIndex); // Returns the offset into the index buffer, or -1 if not found |
| void addRange(intptr_t offset, GLsizei count, UINT minIndex, UINT maxIndex, UINT streamOffset); |
| |
| private: |
| struct IndexRange |
| { |
| intptr_t offset; |
| GLsizei count; |
| |
| bool operator<(const IndexRange& rhs) const |
| { |
| if (offset != rhs.offset) |
| { |
| return offset < rhs.offset; |
| } |
| if (count != rhs.count) |
| { |
| return count < rhs.count; |
| } |
| return false; |
| } |
| }; |
| |
| struct IndexResult |
| { |
| UINT minIndex; |
| UINT maxIndex; |
| UINT streamOffset; |
| }; |
| |
| std::map<IndexRange, IndexResult> mCache; |
| }; |
| |
| } |
| |
| #endif // LIBGLESV2_RENDERER_INDEXBUFFER_H_ |