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      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 // VertexDataManager.h: Defines the VertexDataManager, a class that
      8 // runs the Buffer translation process.
      9 
     10 #ifndef LIBGLESV2_RENDERER_VERTEXDATAMANAGER_H_
     11 #define LIBGLESV2_RENDERER_VERTEXDATAMANAGER_H_
     12 
     13 #include "libGLESv2/Constants.h"
     14 #include "libGLESv2/VertexAttribute.h"
     15 #include "common/angleutils.h"
     16 
     17 namespace gl
     18 {
     19 struct VertexAttribute;
     20 class ProgramBinary;
     21 struct VertexAttribCurrentValueData;
     22 }
     23 
     24 namespace rx
     25 {
     26 class BufferD3D;
     27 class StreamingVertexBufferInterface;
     28 class VertexBuffer;
     29 class Renderer;
     30 
     31 struct TranslatedAttribute
     32 {
     33     TranslatedAttribute() : active(false), attribute(NULL), currentValueType(GL_NONE),
     34                             offset(0), stride(0), vertexBuffer(NULL), storage(NULL),
     35                             serial(0), divisor(0) {};
     36     bool active;
     37 
     38     const gl::VertexAttribute *attribute;
     39     GLenum currentValueType;
     40     unsigned int offset;
     41     unsigned int stride;   // 0 means not to advance the read pointer at all
     42 
     43     VertexBuffer *vertexBuffer;
     44     BufferD3D *storage;
     45     unsigned int serial;
     46     unsigned int divisor;
     47 };
     48 
     49 class VertexDataManager
     50 {
     51   public:
     52     VertexDataManager(rx::Renderer *renderer);
     53     virtual ~VertexDataManager();
     54 
     55     gl::Error prepareVertexData(const gl::VertexAttribute attribs[], const gl::VertexAttribCurrentValueData currentValues[],
     56                                 gl::ProgramBinary *programBinary, GLint start, GLsizei count, TranslatedAttribute *outAttribs, GLsizei instances);
     57 
     58   private:
     59     DISALLOW_COPY_AND_ASSIGN(VertexDataManager);
     60 
     61     gl::Error reserveSpaceForAttrib(const gl::VertexAttribute &attrib,
     62                                     const gl::VertexAttribCurrentValueData &currentValue,
     63                                     GLsizei count,
     64                                     GLsizei instances) const;
     65 
     66     void invalidateMatchingStaticData(const gl::VertexAttribute &attrib,
     67                                       const gl::VertexAttribCurrentValueData &currentValue) const;
     68 
     69     gl::Error storeAttribute(const gl::VertexAttribute &attrib,
     70                              const gl::VertexAttribCurrentValueData &currentValue,
     71                              TranslatedAttribute *translated,
     72                              GLint start,
     73                              GLsizei count,
     74                              GLsizei instances);
     75 
     76     gl::Error storeCurrentValue(const gl::VertexAttribute &attrib,
     77                                 const gl::VertexAttribCurrentValueData &currentValue,
     78                                 TranslatedAttribute *translated,
     79                                 gl::VertexAttribCurrentValueData *cachedValue,
     80                                 size_t *cachedOffset,
     81                                 StreamingVertexBufferInterface *buffer);
     82 
     83     rx::Renderer *const mRenderer;
     84 
     85     StreamingVertexBufferInterface *mStreamingBuffer;
     86 
     87     gl::VertexAttribCurrentValueData mCurrentValue[gl::MAX_VERTEX_ATTRIBS];
     88 
     89     StreamingVertexBufferInterface *mCurrentValueBuffer[gl::MAX_VERTEX_ATTRIBS];
     90     std::size_t mCurrentValueOffsets[gl::MAX_VERTEX_ATTRIBS];
     91 };
     92 
     93 }
     94 
     95 #endif   // LIBGLESV2_RENDERER_VERTEXDATAMANAGER_H_
     96