1 files changed, 126 insertions, 0 deletions
diff --git a/gfx/angle/src/compiler/translator/blocklayout.cpp b/gfx/angle/src/compiler/translator/blocklayout.cpp
new file mode 100755
index 000000000..ba6322848
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/blocklayout.cpp
@@ -0,0 +1,126 @@
+//
+// Copyright (c) 2013-2014 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.
+//
+// blocklayout.cpp:
+//   Implementation for block layout classes and methods.
+//
+
+#include "compiler/translator/blocklayout.h"
+
+#include "common/mathutil.h"
+#include "common/utilities.h"
+
+namespace sh
+{
+
+BlockLayoutEncoder::BlockLayoutEncoder()
+    : mCurrentOffset(0)
+{
+}
+
+BlockMemberInfo BlockLayoutEncoder::encodeType(GLenum type, unsigned int arraySize, bool isRowMajorMatrix)
+{
+    int arrayStride;
+    int matrixStride;
+
+    getBlockLayoutInfo(type, arraySize, isRowMajorMatrix, &arrayStride, &matrixStride);
+
+    const BlockMemberInfo memberInfo(static_cast<int>(mCurrentOffset * BytesPerComponent),
+                                     static_cast<int>(arrayStride * BytesPerComponent),
+                                     static_cast<int>(matrixStride * BytesPerComponent),
+                                     isRowMajorMatrix);
+
+    advanceOffset(type, arraySize, isRowMajorMatrix, arrayStride, matrixStride);
+
+    return memberInfo;
+}
+
+// static
+size_t BlockLayoutEncoder::getBlockRegister(const BlockMemberInfo &info)
+{
+    return (info.offset / BytesPerComponent) / ComponentsPerRegister;
+}
+
+// static
+size_t BlockLayoutEncoder::getBlockRegisterElement(const BlockMemberInfo &info)
+{
+    return (info.offset / BytesPerComponent) % ComponentsPerRegister;
+}
+
+void BlockLayoutEncoder::nextRegister()
+{
+    mCurrentOffset = rx::roundUp<size_t>(mCurrentOffset, ComponentsPerRegister);
+}
+
+Std140BlockEncoder::Std140BlockEncoder()
+{
+}
+
+void Std140BlockEncoder::enterAggregateType()
+{
+    nextRegister();
+}
+
+void Std140BlockEncoder::exitAggregateType()
+{
+    nextRegister();
+}
+
+void Std140BlockEncoder::getBlockLayoutInfo(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int *arrayStrideOut, int *matrixStrideOut)
+{
+    // We assume we are only dealing with 4 byte components (no doubles or half-words currently)
+    ASSERT(gl::VariableComponentSize(gl::VariableComponentType(type)) == BytesPerComponent);
+
+    size_t baseAlignment = 0;
+    int matrixStride = 0;
+    int arrayStride = 0;
+
+    if (gl::IsMatrixType(type))
+    {
+        baseAlignment = ComponentsPerRegister;
+        matrixStride = ComponentsPerRegister;
+
+        if (arraySize > 0)
+        {
+            const int numRegisters = gl::MatrixRegisterCount(type, isRowMajorMatrix);
+            arrayStride = ComponentsPerRegister * numRegisters;
+        }
+    }
+    else if (arraySize > 0)
+    {
+        baseAlignment = ComponentsPerRegister;
+        arrayStride = ComponentsPerRegister;
+    }
+    else
+    {
+        const int numComponents = gl::VariableComponentCount(type);
+        baseAlignment = (numComponents == 3 ? 4u : static_cast<size_t>(numComponents));
+    }
+
+    mCurrentOffset = rx::roundUp(mCurrentOffset, baseAlignment);
+
+    *matrixStrideOut = matrixStride;
+    *arrayStrideOut = arrayStride;
+}
+
+void Std140BlockEncoder::advanceOffset(GLenum type, unsigned int arraySize, bool isRowMajorMatrix, int arrayStride, int matrixStride)
+{
+    if (arraySize > 0)
+    {
+        mCurrentOffset += arrayStride * arraySize;
+    }
+    else if (gl::IsMatrixType(type))
+    {
+        ASSERT(matrixStride == ComponentsPerRegister);
+        const int numRegisters = gl::MatrixRegisterCount(type, isRowMajorMatrix);
+        mCurrentOffset += ComponentsPerRegister * numRegisters;
+    }
+    else
+    {
+        mCurrentOffset += gl::VariableComponentCount(type);
+    }
+}
+
+}