1 files changed, 143 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/renderer/d3d/VertexDataManager.h b/gfx/angle/src/libANGLE/renderer/d3d/VertexDataManager.h
new file mode 100755
index 000000000..da46c7a87
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+++ b/gfx/angle/src/libANGLE/renderer/d3d/VertexDataManager.h
@@ -0,0 +1,143 @@
+//
+// 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.
+//
+
+// VertexDataManager.h: Defines the VertexDataManager, a class that
+// runs the Buffer translation process.
+
+#ifndef LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
+#define LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_
+
+#include "common/angleutils.h"
+#include "libANGLE/angletypes.h"
+#include "libANGLE/Constants.h"
+#include "libANGLE/VertexAttribute.h"
+
+namespace gl
+{
+class State;
+struct VertexAttribute;
+struct VertexAttribCurrentValueData;
+}
+
+namespace rx
+{
+class BufferD3D;
+class BufferFactoryD3D;
+class StreamingVertexBufferInterface;
+class VertexBuffer;
+
+class VertexBufferBinding final
+{
+  public:
+    VertexBufferBinding();
+    VertexBufferBinding(const VertexBufferBinding &other);
+    ~VertexBufferBinding();
+
+    void set(VertexBuffer *vertexBuffer);
+    VertexBuffer *get() const;
+    VertexBufferBinding &operator=(const VertexBufferBinding &other);
+
+  private:
+    VertexBuffer *mBoundVertexBuffer;
+};
+
+struct TranslatedAttribute
+{
+    TranslatedAttribute();
+
+    // Computes the correct offset from baseOffset, usesFirstVertexOffset, stride and startVertex.
+    // Can throw an error on integer overflow.
+    gl::ErrorOrResult<unsigned int> computeOffset(GLint startVertex) const;
+
+    bool active;
+
+    const gl::VertexAttribute *attribute;
+    GLenum currentValueType;
+    unsigned int baseOffset;
+    bool usesFirstVertexOffset;
+    unsigned int stride;   // 0 means not to advance the read pointer at all
+
+    VertexBufferBinding vertexBuffer;
+    BufferD3D *storage;
+    unsigned int serial;
+    unsigned int divisor;
+};
+
+enum class VertexStorageType
+{
+    UNKNOWN,
+    STATIC,         // Translate the vertex data once and re-use it.
+    DYNAMIC,        // Translate the data every frame into a ring buffer.
+    DIRECT,         // Bind a D3D buffer directly without any translation.
+    CURRENT_VALUE,  // Use a single value for the attribute.
+};
+
+// Given a vertex attribute, return the type of storage it will use.
+VertexStorageType ClassifyAttributeStorage(const gl::VertexAttribute &attrib);
+
+class VertexDataManager : angle::NonCopyable
+{
+  public:
+    VertexDataManager(BufferFactoryD3D *factory);
+    virtual ~VertexDataManager();
+
+    gl::Error prepareVertexData(const gl::State &state,
+                                GLint start,
+                                GLsizei count,
+                                std::vector<TranslatedAttribute> *translatedAttribs,
+                                GLsizei instances);
+
+    static void StoreDirectAttrib(TranslatedAttribute *directAttrib);
+
+    static gl::Error StoreStaticAttrib(TranslatedAttribute *translated,
+                                       GLsizei count,
+                                       GLsizei instances);
+
+    gl::Error storeDynamicAttribs(std::vector<TranslatedAttribute> *translatedAttribs,
+                                  const gl::AttributesMask &dynamicAttribsMask,
+                                  GLint start,
+                                  GLsizei count,
+                                  GLsizei instances);
+
+    // Promote static usage of dynamic buffers.
+    static void PromoteDynamicAttribs(const std::vector<TranslatedAttribute> &translatedAttribs,
+                                      const gl::AttributesMask &dynamicAttribsMask,
+                                      GLsizei count);
+
+    gl::Error storeCurrentValue(const gl::VertexAttribCurrentValueData &currentValue,
+                                TranslatedAttribute *translated,
+                                size_t attribIndex);
+
+  private:
+    struct CurrentValueState
+    {
+        CurrentValueState();
+        ~CurrentValueState();
+
+        StreamingVertexBufferInterface *buffer;
+        gl::VertexAttribCurrentValueData data;
+        size_t offset;
+    };
+
+    gl::Error reserveSpaceForAttrib(const TranslatedAttribute &translatedAttrib,
+                                    GLsizei count,
+                                    GLsizei instances) const;
+
+    gl::Error storeDynamicAttrib(TranslatedAttribute *translated,
+                                 GLint start,
+                                 GLsizei count,
+                                 GLsizei instances);
+
+    BufferFactoryD3D *const mFactory;
+
+    StreamingVertexBufferInterface *mStreamingBuffer;
+    std::vector<CurrentValueState> mCurrentValueCache;
+    gl::AttributesMask mDynamicAttribsMaskCache;
+};
+
+}  // namespace rx
+
+#endif   // LIBANGLE_RENDERER_D3D_VERTEXDATAMANAGER_H_