1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/angle/src/libGLESv2/renderer/VertexBuffer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,139 @@
1.4 +//
1.5 +// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
1.6 +// Use of this source code is governed by a BSD-style license that can be
1.7 +// found in the LICENSE file.
1.8 +//
1.9 +
1.10 +// VertexBuffer.h: Defines the abstract VertexBuffer class and VertexBufferInterface
1.11 +// class with derivations, classes that perform graphics API agnostic vertex buffer operations.
1.12 +
1.13 +#ifndef LIBGLESV2_RENDERER_VERTEXBUFFER_H_
1.14 +#define LIBGLESV2_RENDERER_VERTEXBUFFER_H_
1.15 +
1.16 +#include "common/angleutils.h"
1.17 +
1.18 +namespace gl
1.19 +{
1.20 +class VertexAttribute;
1.21 +}
1.22 +
1.23 +namespace rx
1.24 +{
1.25 +class Renderer;
1.26 +
1.27 +class VertexBuffer
1.28 +{
1.29 + public:
1.30 + VertexBuffer();
1.31 + virtual ~VertexBuffer();
1.32 +
1.33 + virtual bool initialize(unsigned int size, bool dynamicUsage) = 0;
1.34 +
1.35 + virtual bool storeVertexAttributes(const gl::VertexAttribute &attrib, GLint start, GLsizei count,
1.36 + GLsizei instances, unsigned int offset) = 0;
1.37 + virtual bool storeRawData(const void* data, unsigned int size, unsigned int offset) = 0;
1.38 +
1.39 + virtual bool getSpaceRequired(const gl::VertexAttribute &attrib, GLsizei count, GLsizei instances,
1.40 + unsigned int *outSpaceRequired) const = 0;
1.41 +
1.42 + virtual bool requiresConversion(const gl::VertexAttribute &attrib) const = 0;
1.43 +
1.44 + virtual unsigned int getBufferSize() const = 0;
1.45 + virtual bool setBufferSize(unsigned int size) = 0;
1.46 + virtual bool discard() = 0;
1.47 +
1.48 + unsigned int getSerial() const;
1.49 +
1.50 + protected:
1.51 + void updateSerial();
1.52 +
1.53 + private:
1.54 + DISALLOW_COPY_AND_ASSIGN(VertexBuffer);
1.55 +
1.56 + unsigned int mSerial;
1.57 + static unsigned int mNextSerial;
1.58 +};
1.59 +
1.60 +class VertexBufferInterface
1.61 +{
1.62 + public:
1.63 + VertexBufferInterface(rx::Renderer *renderer, bool dynamic);
1.64 + virtual ~VertexBufferInterface();
1.65 +
1.66 + bool reserveVertexSpace(const gl::VertexAttribute &attribute, GLsizei count, GLsizei instances);
1.67 + bool reserveRawDataSpace(unsigned int size);
1.68 +
1.69 + unsigned int getBufferSize() const;
1.70 +
1.71 + unsigned int getSerial() const;
1.72 +
1.73 + virtual bool storeVertexAttributes(const gl::VertexAttribute &attrib, GLint start, GLsizei count, GLsizei instances,
1.74 + unsigned int *outStreamOffset);
1.75 + virtual bool storeRawData(const void* data, unsigned int size, unsigned int *outStreamOffset);
1.76 +
1.77 + VertexBuffer* getVertexBuffer() const;
1.78 +
1.79 + protected:
1.80 + virtual bool reserveSpace(unsigned int size) = 0;
1.81 +
1.82 + unsigned int getWritePosition() const;
1.83 + void setWritePosition(unsigned int writePosition);
1.84 +
1.85 + bool discard();
1.86 +
1.87 + bool setBufferSize(unsigned int size);
1.88 +
1.89 + private:
1.90 + DISALLOW_COPY_AND_ASSIGN(VertexBufferInterface);
1.91 +
1.92 + rx::Renderer *const mRenderer;
1.93 +
1.94 + VertexBuffer* mVertexBuffer;
1.95 +
1.96 + unsigned int mWritePosition;
1.97 + unsigned int mReservedSpace;
1.98 + bool mDynamic;
1.99 +};
1.100 +
1.101 +class StreamingVertexBufferInterface : public VertexBufferInterface
1.102 +{
1.103 + public:
1.104 + StreamingVertexBufferInterface(rx::Renderer *renderer, std::size_t initialSize);
1.105 + ~StreamingVertexBufferInterface();
1.106 +
1.107 + protected:
1.108 + bool reserveSpace(unsigned int size);
1.109 +};
1.110 +
1.111 +class StaticVertexBufferInterface : public VertexBufferInterface
1.112 +{
1.113 + public:
1.114 + explicit StaticVertexBufferInterface(rx::Renderer *renderer);
1.115 + ~StaticVertexBufferInterface();
1.116 +
1.117 + bool storeVertexAttributes(const gl::VertexAttribute &attrib, GLint start, GLsizei count, GLsizei instances,
1.118 + unsigned int *outStreamOffset);
1.119 +
1.120 + bool lookupAttribute(const gl::VertexAttribute &attribute, unsigned int* outStreamOffset);
1.121 +
1.122 + protected:
1.123 + bool reserveSpace(unsigned int size);
1.124 +
1.125 + private:
1.126 + struct VertexElement
1.127 + {
1.128 + GLenum type;
1.129 + GLint size;
1.130 + GLsizei stride;
1.131 + bool normalized;
1.132 + int attributeOffset;
1.133 +
1.134 + unsigned int streamOffset;
1.135 + };
1.136 +
1.137 + std::vector<VertexElement> mCache;
1.138 +};
1.139 +
1.140 +}
1.141 +
1.142 +#endif // LIBGLESV2_RENDERER_VERTEXBUFFER_H_
1.143 \ No newline at end of file
