1 files changed, 161 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/renderer/d3d/d3d9/IndexBuffer9.cpp b/gfx/angle/checkout/src/libANGLE/renderer/d3d/d3d9/IndexBuffer9.cpp
new file mode 100644
index 0000000000..26bae3bdb8
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/renderer/d3d/d3d9/IndexBuffer9.cpp
@@ -0,0 +1,161 @@
+//
+// Copyright 2002 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.
+//
+
+// Indexffer9.cpp: Defines the D3D9 IndexBuffer implementation.
+
+#include "libANGLE/renderer/d3d/d3d9/IndexBuffer9.h"
+
+#include "libANGLE/Context.h"
+#include "libANGLE/renderer/d3d/d3d9/Renderer9.h"
+
+namespace rx
+{
+
+IndexBuffer9::IndexBuffer9(Renderer9 *const renderer) : mRenderer(renderer)
+{
+    mIndexBuffer = nullptr;
+    mBufferSize  = 0;
+    mIndexType   = gl::DrawElementsType::InvalidEnum;
+    mDynamic     = false;
+}
+
+IndexBuffer9::~IndexBuffer9()
+{
+    SafeRelease(mIndexBuffer);
+}
+
+angle::Result IndexBuffer9::initialize(const gl::Context *context,
+                                       unsigned int bufferSize,
+                                       gl::DrawElementsType indexType,
+                                       bool dynamic)
+{
+    SafeRelease(mIndexBuffer);
+
+    updateSerial();
+
+    if (bufferSize > 0)
+    {
+        D3DFORMAT format = D3DFMT_UNKNOWN;
+        if (indexType == gl::DrawElementsType::UnsignedShort ||
+            indexType == gl::DrawElementsType::UnsignedByte)
+        {
+            format = D3DFMT_INDEX16;
+        }
+        else if (indexType == gl::DrawElementsType::UnsignedInt)
+        {
+            ASSERT(mRenderer->getNativeExtensions().elementIndexUintOES);
+            format = D3DFMT_INDEX32;
+        }
+        else
+            UNREACHABLE();
+
+        DWORD usageFlags = D3DUSAGE_WRITEONLY;
+        if (dynamic)
+        {
+            usageFlags |= D3DUSAGE_DYNAMIC;
+        }
+
+        HRESULT result =
+            mRenderer->createIndexBuffer(bufferSize, usageFlags, format, &mIndexBuffer);
+        ANGLE_TRY_HR(GetImplAs<Context9>(context), result,
+                     "Failed to allocate internal index buffer");
+    }
+
+    mBufferSize = bufferSize;
+    mIndexType  = indexType;
+    mDynamic    = dynamic;
+
+    return angle::Result::Continue;
+}
+
+angle::Result IndexBuffer9::mapBuffer(const gl::Context *context,
+                                      unsigned int offset,
+                                      unsigned int size,
+                                      void **outMappedMemory)
+{
+    ASSERT(mIndexBuffer);
+
+    DWORD lockFlags = mDynamic ? D3DLOCK_NOOVERWRITE : 0;
+
+    void *mapPtr   = nullptr;
+    HRESULT result = mIndexBuffer->Lock(offset, size, &mapPtr, lockFlags);
+    ANGLE_TRY_HR(GetImplAs<Context9>(context), result, "Failed to lock internal index buffer");
+
+    *outMappedMemory = mapPtr;
+    return angle::Result::Continue;
+}
+
+angle::Result IndexBuffer9::unmapBuffer(const gl::Context *context)
+{
+    ASSERT(mIndexBuffer);
+    HRESULT result = mIndexBuffer->Unlock();
+    ANGLE_TRY_HR(GetImplAs<Context9>(context), result, "Failed to unlock internal index buffer");
+
+    return angle::Result::Continue;
+}
+
+gl::DrawElementsType IndexBuffer9::getIndexType() const
+{
+    return mIndexType;
+}
+
+unsigned int IndexBuffer9::getBufferSize() const
+{
+    return mBufferSize;
+}
+
+angle::Result IndexBuffer9::setSize(const gl::Context *context,
+                                    unsigned int bufferSize,
+                                    gl::DrawElementsType indexType)
+{
+    if (bufferSize > mBufferSize || indexType != mIndexType)
+    {
+        return initialize(context, bufferSize, indexType, mDynamic);
+    }
+
+    return angle::Result::Continue;
+}
+
+angle::Result IndexBuffer9::discard(const gl::Context *context)
+{
+    ASSERT(mIndexBuffer);
+
+    void *mock;
+    HRESULT result;
+
+    Context9 *context9 = GetImplAs<Context9>(context);
+
+    result = mIndexBuffer->Lock(0, 1, &mock, D3DLOCK_DISCARD);
+    ANGLE_TRY_HR(context9, result, "Failed to lock internal index buffer");
+
+    result = mIndexBuffer->Unlock();
+    ANGLE_TRY_HR(context9, result, "Failed to unlock internal index buffer");
+
+    return angle::Result::Continue;
+}
+
+D3DFORMAT IndexBuffer9::getIndexFormat() const
+{
+    switch (mIndexType)
+    {
+        case gl::DrawElementsType::UnsignedByte:
+            return D3DFMT_INDEX16;
+        case gl::DrawElementsType::UnsignedShort:
+            return D3DFMT_INDEX16;
+        case gl::DrawElementsType::UnsignedInt:
+            return D3DFMT_INDEX32;
+        default:
+            UNREACHABLE();
+            return D3DFMT_UNKNOWN;
+    }
+}
+
+IDirect3DIndexBuffer9 *IndexBuffer9::getBuffer() const
+{
+    return mIndexBuffer;
+}
+
+}  // namespace rx