1 files changed, 100 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/renderer/d3d/IndexBuffer.h b/gfx/angle/src/libANGLE/renderer/d3d/IndexBuffer.h
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index 000000000..0b7b28ddf
--- /dev/null
+++ b/gfx/angle/src/libANGLE/renderer/d3d/IndexBuffer.h
@@ -0,0 +1,100 @@
+//
+// 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 LIBANGLE_RENDERER_D3D_INDEXBUFFER_H_
+#define LIBANGLE_RENDERER_D3D_INDEXBUFFER_H_
+
+#include "common/angleutils.h"
+#include "libANGLE/Error.h"
+
+namespace rx
+{
+class BufferFactoryD3D;
+
+class IndexBuffer : angle::NonCopyable
+{
+  public:
+    IndexBuffer();
+    virtual ~IndexBuffer();
+
+    virtual gl::Error initialize(unsigned int bufferSize, GLenum indexType, bool dynamic) = 0;
+
+    virtual gl::Error mapBuffer(unsigned int offset, unsigned int size, void** outMappedMemory) = 0;
+    virtual gl::Error unmapBuffer() = 0;
+
+    virtual gl::Error discard() = 0;
+
+    virtual GLenum getIndexType() const = 0;
+    virtual unsigned int getBufferSize() const = 0;
+    virtual gl::Error setSize(unsigned int bufferSize, GLenum indexType) = 0;
+
+    unsigned int getSerial() const;
+
+  protected:
+    void updateSerial();
+
+  private:
+    unsigned int mSerial;
+    static unsigned int mNextSerial;
+};
+
+class IndexBufferInterface : angle::NonCopyable
+{
+  public:
+    IndexBufferInterface(BufferFactoryD3D *factory, bool dynamic);
+    virtual ~IndexBufferInterface();
+
+    virtual gl::Error reserveBufferSpace(unsigned int size, GLenum indexType) = 0;
+
+    GLenum getIndexType() const;
+    unsigned int getBufferSize() const;
+
+    unsigned int getSerial() const;
+
+    gl::Error mapBuffer(unsigned int size, void** outMappedMemory, unsigned int *streamOffset);
+    gl::Error unmapBuffer();
+
+    IndexBuffer *getIndexBuffer() const;
+
+  protected:
+    unsigned int getWritePosition() const;
+    void setWritePosition(unsigned int writePosition);
+
+    gl::Error discard();
+
+    gl::Error setBufferSize(unsigned int bufferSize, GLenum indexType);
+
+  private:
+    IndexBuffer *mIndexBuffer;
+
+    unsigned int mWritePosition;
+    bool mDynamic;
+};
+
+class StreamingIndexBufferInterface : public IndexBufferInterface
+{
+  public:
+    explicit StreamingIndexBufferInterface(BufferFactoryD3D *factory);
+    ~StreamingIndexBufferInterface();
+
+    gl::Error reserveBufferSpace(unsigned int size, GLenum indexType) override;
+};
+
+class StaticIndexBufferInterface : public IndexBufferInterface
+{
+  public:
+    explicit StaticIndexBufferInterface(BufferFactoryD3D *factory);
+    ~StaticIndexBufferInterface();
+
+    gl::Error reserveBufferSpace(unsigned int size, GLenum indexType) override;
+};
+
+}
+
+#endif // LIBANGLE_RENDERER_D3D_INDEXBUFFER_H_