1 files changed, 137 insertions, 0 deletions

diff --git a/src/3rdparty/angle/src/libGLESv2/renderer/IndexBuffer.h b/src/3rdparty/angle/src/libGLESv2/renderer/IndexBuffer.h
new file mode 100644
index 0000000000..1afbd626fa
--- /dev/null
+++ b/src/3rdparty/angle/src/libGLESv2/renderer/IndexBuffer.h
@@ -0,0 +1,137 @@
+//
+// 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_
+
+#include "common/angleutils.h"
+
+namespace rx
+{
+class Renderer;
+
+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);
+
+    unsigned int lookupRange(intptr_t offset, GLsizei count, unsigned int *minIndex, unsigned int *maxIndex);   // Returns the offset into the index buffer, or -1 if not found
+    void addRange(intptr_t offset, GLsizei count, unsigned int minIndex, unsigned int maxIndex, unsigned int 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
+    {
+        unsigned int minIndex;
+        unsigned int maxIndex;
+        unsigned int streamOffset;
+    };
+
+    std::map<IndexRange, IndexResult> mCache;
+};
+
+}
+
+#endif // LIBGLESV2_RENDERER_INDEXBUFFER_H_
\ No newline at end of file