Home | History | Annotate | Download | only in d3d 
      1 //
      2 // Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
      3 // Use of this source code is governed by a BSD-style license that can be
      4 // found in the LICENSE file.
      5 //
      6 
      7 // IndexBuffer.h: Defines the abstract IndexBuffer class and IndexBufferInterface
      8 // class with derivations, classes that perform graphics API agnostic index buffer operations.
      9 
     10 #ifndef LIBGLESV2_RENDERER_INDEXBUFFER_H_
     11 #define LIBGLESV2_RENDERER_INDEXBUFFER_H_
     12 
     13 #include "common/angleutils.h"
     14 #include "libGLESv2/Error.h"
     15 #include "libGLESv2/renderer/IndexRangeCache.h"
     16 
     17 namespace rx
     18 {
     19 class Renderer;
     20 
     21 class IndexBuffer
     22 {
     23   public:
     24     IndexBuffer();
     25     virtual ~IndexBuffer();
     26 
     27     virtual gl::Error initialize(unsigned int bufferSize, GLenum indexType, bool dynamic) = 0;
     28 
     29     virtual gl::Error mapBuffer(unsigned int offset, unsigned int size, void** outMappedMemory) = 0;
     30     virtual gl::Error unmapBuffer() = 0;
     31 
     32     virtual gl::Error discard() = 0;
     33 
     34     virtual GLenum getIndexType() const = 0;
     35     virtual unsigned int getBufferSize() const = 0;
     36     virtual gl::Error setSize(unsigned int bufferSize, GLenum indexType) = 0;
     37 
     38     unsigned int getSerial() const;
     39 
     40   protected:
     41     void updateSerial();
     42 
     43   private:
     44     DISALLOW_COPY_AND_ASSIGN(IndexBuffer);
     45 
     46     unsigned int mSerial;
     47     static unsigned int mNextSerial;
     48 };
     49 
     50 class IndexBufferInterface
     51 {
     52   public:
     53     IndexBufferInterface(Renderer *renderer, bool dynamic);
     54     virtual ~IndexBufferInterface();
     55 
     56     virtual gl::Error reserveBufferSpace(unsigned int size, GLenum indexType) = 0;
     57 
     58     GLenum getIndexType() const;
     59     unsigned int getBufferSize() const;
     60 
     61     unsigned int getSerial() const;
     62 
     63     gl::Error mapBuffer(unsigned int size, void** outMappedMemory, unsigned int *streamOffset);
     64     gl::Error unmapBuffer();
     65 
     66     IndexBuffer *getIndexBuffer() const;
     67 
     68   protected:
     69     unsigned int getWritePosition() const;
     70     void setWritePosition(unsigned int writePosition);
     71 
     72     gl::Error discard();
     73 
     74     gl::Error setBufferSize(unsigned int bufferSize, GLenum indexType);
     75 
     76   private:
     77     DISALLOW_COPY_AND_ASSIGN(IndexBufferInterface);
     78 
     79     rx::Renderer *const mRenderer;
     80 
     81     IndexBuffer* mIndexBuffer;
     82 
     83     unsigned int mWritePosition;
     84     bool mDynamic;
     85 };
     86 
     87 class StreamingIndexBufferInterface : public IndexBufferInterface
     88 {
     89   public:
     90     StreamingIndexBufferInterface(Renderer *renderer);
     91     ~StreamingIndexBufferInterface();
     92 
     93     virtual gl::Error reserveBufferSpace(unsigned int size, GLenum indexType);
     94 };
     95 
     96 class StaticIndexBufferInterface : public IndexBufferInterface
     97 {
     98   public:
     99     explicit StaticIndexBufferInterface(Renderer *renderer);
    100     ~StaticIndexBufferInterface();
    101 
    102     virtual gl::Error reserveBufferSpace(unsigned int size, GLenum indexType);
    103 
    104     IndexRangeCache *getIndexRangeCache();
    105 
    106   private:
    107     IndexRangeCache mIndexRangeCache;
    108 };
    109 
    110 }
    111 
    112 #endif // LIBGLESV2_RENDERER_INDEXBUFFER_H_
    113