1 files changed, 195 insertions, 0 deletions
diff --git a/gfx/angle/src/tests/gl_tests/D3D11EmulatedIndexedBufferTest.cpp b/gfx/angle/src/tests/gl_tests/D3D11EmulatedIndexedBufferTest.cpp
new file mode 100755
index 000000000..c26cf0e08
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+++ b/gfx/angle/src/tests/gl_tests/D3D11EmulatedIndexedBufferTest.cpp
@@ -0,0 +1,195 @@
+//
+// Copyright 2015 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.
+//
+// D3D11EmulatedIndexedBufferTest:
+//   Tests to validate our D3D11 support for emulating an indexed
+//   vertex buffer.
+//
+
+#include "libANGLE/angletypes.h"
+#include "libANGLE/Context.h"
+#include "libANGLE/renderer/d3d/d3d11/Buffer11.h"
+#include "libANGLE/renderer/d3d/d3d11/Context11.h"
+#include "libANGLE/renderer/d3d/d3d11/Renderer11.h"
+#include "libANGLE/renderer/d3d/IndexDataManager.h"
+#include "test_utils/ANGLETest.h"
+#include "test_utils/angle_test_instantiate.h"
+
+using namespace angle;
+
+namespace
+{
+
+class D3D11EmulatedIndexedBufferTest : public ANGLETest
+{
+  protected:
+
+    void SetUp() override
+    {
+        ANGLETest::SetUp();
+        ASSERT_EQ(EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE, GetParam().getRenderer());
+
+        gl::Context *context = reinterpret_cast<gl::Context *>(getEGLWindow()->getContext());
+        rx::Context11 *context11 = rx::GetImplAs<rx::Context11>(context);
+        mRenderer                = context11->getRenderer();
+
+        mSourceBuffer      = new rx::Buffer11(mBufferState, mRenderer);
+        GLfloat testData[] = { 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f };
+        gl::Error error =
+            mSourceBuffer->setData(GL_ARRAY_BUFFER, testData, sizeof(testData), GL_STATIC_DRAW);
+        ASSERT_FALSE(error.isError());
+
+        mTranslatedAttribute.baseOffset            = 0;
+        mTranslatedAttribute.usesFirstVertexOffset = false;
+        mTranslatedAttribute.stride = sizeof(GLfloat);
+
+        GLubyte indices[] = {0, 0, 3, 4, 2, 1, 1};
+
+        for (size_t i = 0; i < ArraySize(indices); i++)
+        {
+            mExpectedExpandedData.push_back(testData[indices[i]]);
+            mubyteIndices.push_back(indices[i]);
+            muintIndices.push_back(indices[i]);
+            mushortIndices.push_back(indices[i]);
+        }
+    }
+
+    void TearDown() override
+    {
+        SafeDelete(mSourceBuffer);
+        ANGLETest::TearDown();
+    }
+
+    void createMappableCompareBufferFromEmulatedBuffer(ID3D11Buffer *sourceBuffer, GLuint size, ID3D11Buffer **mappableBuffer)
+    {
+        *mappableBuffer = nullptr;
+
+        D3D11_BUFFER_DESC bufferDesc;
+        bufferDesc.ByteWidth = size;
+        bufferDesc.MiscFlags = 0;
+        bufferDesc.StructureByteStride = 0;
+        bufferDesc.Usage = D3D11_USAGE_STAGING;
+        bufferDesc.BindFlags = 0;
+        bufferDesc.CPUAccessFlags = D3D11_CPU_ACCESS_READ | D3D11_CPU_ACCESS_WRITE;
+
+        HRESULT hr = mRenderer->getDevice()->CreateBuffer(&bufferDesc, nullptr, mappableBuffer);
+        ASSERT_TRUE(SUCCEEDED(hr));
+
+        D3D11_BOX srcBox;
+        srcBox.left = 0;
+        srcBox.right = size;
+        srcBox.top = 0;
+        srcBox.bottom = 1;
+        srcBox.front = 0;
+        srcBox.back = 1;
+
+        mRenderer->getDeviceContext()->CopySubresourceRegion(*mappableBuffer, 0, 0, 0, 0, sourceBuffer, 0, &srcBox);
+    }
+
+    void compareContents(ID3D11Buffer *actual)
+    {
+        ID3D11Buffer *compareBuffer = nullptr;
+        createMappableCompareBufferFromEmulatedBuffer(
+            actual, sizeof(GLfloat) * static_cast<GLuint>(mExpectedExpandedData.size()),
+            &compareBuffer);
+
+        D3D11_MAPPED_SUBRESOURCE mappedResource;
+        HRESULT hr = mRenderer->getDeviceContext()->Map(compareBuffer, 0, D3D11_MAP_READ, 0, &mappedResource);
+        ASSERT_TRUE(SUCCEEDED(hr));
+
+        GLfloat* compareData = static_cast<GLfloat*>(mappedResource.pData);
+        for (size_t i = 0; i < mExpectedExpandedData.size(); i++)
+        {
+            EXPECT_EQ(mExpectedExpandedData[i], compareData[i]);
+        }
+
+        mRenderer->getDeviceContext()->Unmap(compareBuffer, 0);
+        SafeRelease(compareBuffer);
+    }
+
+    void emulateAndCompare(rx::SourceIndexData *srcData)
+    {
+        auto bufferOrError =
+            mSourceBuffer->getEmulatedIndexedBuffer(srcData, mTranslatedAttribute, 0);
+        ASSERT_FALSE(bufferOrError.isError());
+        ID3D11Buffer *emulatedBuffer = bufferOrError.getResult();
+        ASSERT_TRUE(emulatedBuffer != nullptr);
+        compareContents(emulatedBuffer);
+    }
+
+  protected:
+    rx::Buffer11 *mSourceBuffer;
+    rx::Renderer11 *mRenderer;
+    rx::TranslatedAttribute mTranslatedAttribute;
+    std::vector<GLfloat> mExpectedExpandedData;
+    std::vector<GLubyte> mubyteIndices;
+    std::vector<GLuint> muintIndices;
+    std::vector<GLushort> mushortIndices;
+    gl::BufferState mBufferState;
+};
+
+// This tests that a GL_UNSIGNED_BYTE indices list can be successfully expanded
+// into a valid emulated indexed buffer.
+TEST_P(D3D11EmulatedIndexedBufferTest, TestNativeToExpandedUsingGLubyteIndices)
+{
+    rx::SourceIndexData srcData = {nullptr, mubyteIndices.data(),
+                                   static_cast<unsigned int>(mubyteIndices.size()),
+                                   GL_UNSIGNED_BYTE, false};
+    emulateAndCompare(&srcData);
+}
+
+// This tests that a GL_UNSIGNED_SHORT indices list can be successfully expanded
+// into a valid emulated indexed buffer.
+TEST_P(D3D11EmulatedIndexedBufferTest, TestNativeToExpandedUsingGLushortIndices)
+{
+    rx::SourceIndexData srcData = {nullptr, mushortIndices.data(),
+                                   static_cast<unsigned int>(mushortIndices.size()),
+                                   GL_UNSIGNED_SHORT, false};
+    emulateAndCompare(&srcData);
+}
+
+// This tests that a GL_UNSIGNED_INT indices list can be successfully expanded
+// into a valid emulated indexed buffer.
+TEST_P(D3D11EmulatedIndexedBufferTest, TestNativeToExpandedUsingGLuintIndices)
+{
+    rx::SourceIndexData srcData = {nullptr, muintIndices.data(),
+                                   static_cast<unsigned int>(muintIndices.size()), GL_UNSIGNED_INT,
+                                   false};
+    emulateAndCompare(&srcData);
+}
+
+// This tests verifies that a Buffer11 contents remain unchanged after calling getEmulatedIndexedBuffer
+TEST_P(D3D11EmulatedIndexedBufferTest, TestSourceBufferRemainsUntouchedAfterExpandOperation)
+{
+    // Copy the original source buffer before any expand calls have been made
+    gl::BufferState cleanSourceState;
+    rx::Buffer11 *cleanSourceBuffer = new rx::Buffer11(cleanSourceState, mRenderer);
+    cleanSourceBuffer->copySubData(mSourceBuffer, 0, 0, mSourceBuffer->getSize());
+
+    // Do a basic exanded and compare test.
+    rx::SourceIndexData srcData = {nullptr, muintIndices.data(),
+                                   static_cast<unsigned int>(muintIndices.size()), GL_UNSIGNED_INT,
+                                   false};
+    emulateAndCompare(&srcData);
+
+    const uint8_t *sourceBufferMem = nullptr;
+    const uint8_t *cleanBufferMem = nullptr;
+
+    gl::Error error = mSourceBuffer->getData(&sourceBufferMem);
+    ASSERT_FALSE(error.isError());
+
+    error = cleanSourceBuffer->getData(&cleanBufferMem);
+    ASSERT_FALSE(error.isError());
+
+    int result = memcmp(sourceBufferMem, cleanBufferMem, cleanSourceBuffer->getSize());
+    ASSERT_EQ(result, 0);
+
+    SafeDelete(cleanSourceBuffer);
+}
+
+ANGLE_INSTANTIATE_TEST(D3D11EmulatedIndexedBufferTest,
+                       ES2_D3D11());
+
+} // anonymous namespace