1 files changed, 164 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/image_util/loadimage.inc b/gfx/angle/checkout/src/image_util/loadimage.inc
new file mode 100644
index 0000000000..58886a00a0
--- /dev/null
+++ b/gfx/angle/checkout/src/image_util/loadimage.inc
@@ -0,0 +1,164 @@
+//
+// Copyright (c) 2014-2015 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.
+//
+
+#include "common/mathutil.h"
+
+#include <string.h>
+
+namespace angle
+{
+
+namespace priv
+{
+
+template <typename T>
+inline T *OffsetDataPointer(uint8_t *data, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
+{
+    return reinterpret_cast<T*>(data + (y * rowPitch) + (z * depthPitch));
+}
+
+template <typename T>
+inline const T *OffsetDataPointer(const uint8_t *data, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
+{
+    return reinterpret_cast<const T*>(data + (y * rowPitch) + (z * depthPitch));
+}
+
+}  // namespace priv
+
+template <typename type, size_t componentCount>
+inline void LoadToNative(size_t width, size_t height, size_t depth,
+                         const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
+                         uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
+{
+    const size_t rowSize = width * sizeof(type) * componentCount;
+    const size_t layerSize = rowSize * height;
+    const size_t imageSize = layerSize * depth;
+
+    if (layerSize == inputDepthPitch && layerSize == outputDepthPitch)
+    {
+        ASSERT(rowSize == inputRowPitch && rowSize == outputRowPitch);
+        memcpy(output, input, imageSize);
+    }
+    else if (rowSize == inputRowPitch && rowSize == outputRowPitch)
+    {
+        for (size_t z = 0; z < depth; z++)
+        {
+            const type *source = priv::OffsetDataPointer<type>(input, 0, z, inputRowPitch, inputDepthPitch);
+            type *dest = priv::OffsetDataPointer<type>(output, 0, z, outputRowPitch, outputDepthPitch);
+
+            memcpy(dest, source, layerSize);
+        }
+    }
+    else
+    {
+        for (size_t z = 0; z < depth; z++)
+        {
+            for (size_t y = 0; y < height; y++)
+            {
+                const type *source = priv::OffsetDataPointer<type>(input, y, z, inputRowPitch, inputDepthPitch);
+                type *dest = priv::OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
+                memcpy(dest, source, width * sizeof(type) * componentCount);
+            }
+        }
+    }
+}
+
+template <typename type, uint32_t fourthComponentBits>
+inline void LoadToNative3To4(size_t width, size_t height, size_t depth,
+                             const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
+                             uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
+{
+    const type fourthValue = gl::bitCast<type>(fourthComponentBits);
+
+    for (size_t z = 0; z < depth; z++)
+    {
+        for (size_t y = 0; y < height; y++)
+        {
+            const type *source = priv::OffsetDataPointer<type>(input, y, z, inputRowPitch, inputDepthPitch);
+            type *dest = priv::OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
+            for (size_t x = 0; x < width; x++)
+            {
+                dest[x * 4 + 0] = source[x * 3 + 0];
+                dest[x * 4 + 1] = source[x * 3 + 1];
+                dest[x * 4 + 2] = source[x * 3 + 2];
+                dest[x * 4 + 3] = fourthValue;
+            }
+        }
+    }
+}
+
+template <size_t componentCount>
+inline void Load32FTo16F(size_t width, size_t height, size_t depth,
+                         const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
+                         uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
+{
+    const size_t elementWidth = componentCount * width;
+
+    for (size_t z = 0; z < depth; z++)
+    {
+        for (size_t y = 0; y < height; y++)
+        {
+            const float *source = priv::OffsetDataPointer<float>(input, y, z, inputRowPitch, inputDepthPitch);
+            uint16_t *dest = priv::OffsetDataPointer<uint16_t>(output, y, z, outputRowPitch, outputDepthPitch);
+
+            for (size_t x = 0; x < elementWidth; x++)
+            {
+                dest[x] = gl::float32ToFloat16(source[x]);
+            }
+        }
+    }
+}
+
+template <size_t blockWidth, size_t blockHeight, size_t blockDepth, size_t blockSize>
+inline void LoadCompressedToNative(size_t width, size_t height, size_t depth,
+                                   const uint8_t *input, size_t inputRowPitch, size_t inputDepthPitch,
+                                   uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
+{
+    const size_t columns = (width + (blockWidth - 1)) / blockWidth;
+    const size_t rows = (height + (blockHeight - 1)) / blockHeight;
+    const size_t layers = (depth + (blockDepth - 1)) / blockDepth;
+
+    for (size_t z = 0; z < layers; ++z)
+    {
+        for (size_t y = 0; y < rows; ++y)
+        {
+            const uint8_t *source = priv::OffsetDataPointer<uint8_t>(input, y, z, inputRowPitch, inputDepthPitch);
+            uint8_t *dest = priv::OffsetDataPointer<uint8_t>(output, y, z, outputRowPitch, outputDepthPitch);
+            memcpy(dest, source, columns * blockSize);
+        }
+    }
+}
+
+template <typename type, uint32_t firstBits, uint32_t secondBits, uint32_t thirdBits, uint32_t fourthBits>
+inline void Initialize4ComponentData(size_t width, size_t height, size_t depth,
+                                     uint8_t *output, size_t outputRowPitch, size_t outputDepthPitch)
+{
+    type writeValues[4] =
+    {
+        gl::bitCast<type>(firstBits),
+        gl::bitCast<type>(secondBits),
+        gl::bitCast<type>(thirdBits),
+        gl::bitCast<type>(fourthBits),
+    };
+
+    for (size_t z = 0; z < depth; z++)
+    {
+        for (size_t y = 0; y < height; y++)
+        {
+            type *destRow = priv::OffsetDataPointer<type>(output, y, z, outputRowPitch, outputDepthPitch);
+            for (size_t x = 0; x < width; x++)
+            {
+                type* destPixel = destRow + x * 4;
+
+                // This could potentially be optimized by generating an entire row of initialization
+                // data and copying row by row instead of pixel by pixel.
+                memcpy(destPixel, writeValues, sizeof(type) * 4);
+            }
+        }
+    }
+}
+
+} // namespace angle