1 files changed, 266 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/libANGLE/renderer/d3d/generatemip.inl b/src/3rdparty/angle/src/libANGLE/renderer/d3d/generatemip.inl
new file mode 100644
index 0000000000..265783641e
--- /dev/null
+++ b/src/3rdparty/angle/src/libANGLE/renderer/d3d/generatemip.inl
@@ -0,0 +1,266 @@
+//
+// Copyright (c) 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.
+//
+
+// generatemip.inl: Defines the GenerateMip function, templated on the format
+// type of the image for which mip levels are being generated.
+
+#include "common/mathutil.h"
+
+namespace rx
+{
+
+namespace priv
+{
+
+template <typename T>
+static inline T *GetPixel(uint8_t *data, size_t x, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
+{
+    return reinterpret_cast<T*>(data + (x * sizeof(T)) + (y * rowPitch) + (z * depthPitch));
+}
+
+template <typename T>
+static inline const T *GetPixel(const uint8_t *data, size_t x, size_t y, size_t z, size_t rowPitch, size_t depthPitch)
+{
+    return reinterpret_cast<const T*>(data + (x * sizeof(T)) + (y * rowPitch) + (z * depthPitch));
+}
+
+template <typename T>
+static void GenerateMip_Y(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                          const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                          size_t destWidth, size_t destHeight, size_t destDepth,
+                          uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    ASSERT(sourceWidth == 1);
+    ASSERT(sourceHeight > 1);
+    ASSERT(sourceDepth == 1);
+
+    for (size_t y = 0; y < destHeight; y++)
+    {
+        const T *src0 = GetPixel<T>(sourceData, 0, y * 2, 0, sourceRowPitch, sourceDepthPitch);
+        const T *src1 = GetPixel<T>(sourceData, 0, y * 2 + 1, 0, sourceRowPitch, sourceDepthPitch);
+        T *dst = GetPixel<T>(destData, 0, y, 0, destRowPitch, destDepthPitch);
+
+        T::average(dst, src0, src1);
+    }
+}
+
+template <typename T>
+static void GenerateMip_X(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                          const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                          size_t destWidth, size_t destHeight, size_t destDepth,
+                          uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    ASSERT(sourceWidth > 1);
+    ASSERT(sourceHeight == 1);
+    ASSERT(sourceDepth == 1);
+
+    for (size_t x = 0; x < destWidth; x++)
+    {
+        const T *src0 = GetPixel<T>(sourceData, x * 2, 0, 0, sourceRowPitch, sourceDepthPitch);
+        const T *src1 = GetPixel<T>(sourceData, x * 2 + 1, 0, 0, sourceRowPitch, sourceDepthPitch);
+        T *dst = GetPixel<T>(destData, x, 0, 0, destRowPitch, destDepthPitch);
+
+        T::average(dst, src0, src1);
+    }
+}
+
+template <typename T>
+static void GenerateMip_Z(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                          const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                          size_t destWidth, size_t destHeight, size_t destDepth,
+                          uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    ASSERT(sourceWidth == 1);
+    ASSERT(sourceHeight == 1);
+    ASSERT(sourceDepth > 1);
+
+    for (size_t z = 0; z < destDepth; z++)
+    {
+        const T *src0 = GetPixel<T>(sourceData, 0, 0, z * 2, sourceRowPitch, sourceDepthPitch);
+        const T *src1 = GetPixel<T>(sourceData, 0, 0, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+        T *dst = GetPixel<T>(destData, 0, 0, z, destRowPitch, destDepthPitch);
+
+        T::average(dst, src0, src1);
+    }
+}
+
+template <typename T>
+static void GenerateMip_XY(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                           const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                           size_t destWidth, size_t destHeight, size_t destDepth,
+                           uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    ASSERT(sourceWidth > 1);
+    ASSERT(sourceHeight > 1);
+    ASSERT(sourceDepth == 1);
+
+    for (size_t y = 0; y < destHeight; y++)
+    {
+        for (size_t x = 0; x < destWidth; x++)
+        {
+            const T *src0 = GetPixel<T>(sourceData, x * 2, y * 2, 0, sourceRowPitch, sourceDepthPitch);
+            const T *src1 = GetPixel<T>(sourceData, x * 2, y * 2 + 1, 0, sourceRowPitch, sourceDepthPitch);
+            const T *src2 = GetPixel<T>(sourceData, x * 2 + 1, y * 2, 0, sourceRowPitch, sourceDepthPitch);
+            const T *src3 = GetPixel<T>(sourceData, x * 2 + 1, y * 2 + 1, 0, sourceRowPitch, sourceDepthPitch);
+            T *dst = GetPixel<T>(destData, x, y, 0, destRowPitch, destDepthPitch);
+
+            T tmp0, tmp1;
+
+            T::average(&tmp0, src0, src1);
+            T::average(&tmp1, src2, src3);
+            T::average(dst, &tmp0, &tmp1);
+        }
+    }
+}
+
+template <typename T>
+static void GenerateMip_YZ(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                           const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                           size_t destWidth, size_t destHeight, size_t destDepth,
+                           uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    ASSERT(sourceWidth == 1);
+    ASSERT(sourceHeight > 1);
+    ASSERT(sourceDepth > 1);
+
+    for (size_t z = 0; z < destDepth; z++)
+    {
+        for (size_t y = 0; y < destHeight; y++)
+        {
+            const T *src0 = GetPixel<T>(sourceData, 0, y * 2, z * 2, sourceRowPitch, sourceDepthPitch);
+            const T *src1 = GetPixel<T>(sourceData, 0, y * 2, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+            const T *src2 = GetPixel<T>(sourceData, 0, y * 2 + 1, z * 2, sourceRowPitch, sourceDepthPitch);
+            const T *src3 = GetPixel<T>(sourceData, 0, y * 2 + 1, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+            T *dst = GetPixel<T>(destData, 0, y, z, destRowPitch, destDepthPitch);
+
+            T tmp0, tmp1;
+
+            T::average(&tmp0, src0, src1);
+            T::average(&tmp1, src2, src3);
+            T::average(dst, &tmp0, &tmp1);
+        }
+    }
+}
+
+template <typename T>
+static void GenerateMip_XZ(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                           const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                           size_t destWidth, size_t destHeight, size_t destDepth,
+                           uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    ASSERT(sourceWidth > 1);
+    ASSERT(sourceHeight == 1);
+    ASSERT(sourceDepth > 1);
+
+    for (size_t z = 0; z < destDepth; z++)
+    {
+        for (size_t x = 0; x < destWidth; x++)
+        {
+            const T *src0 = GetPixel<T>(sourceData, x * 2, 0, z * 2, sourceRowPitch, sourceDepthPitch);
+            const T *src1 = GetPixel<T>(sourceData, x * 2, 0, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+            const T *src2 = GetPixel<T>(sourceData, x * 2 + 1, 0, z * 2, sourceRowPitch, sourceDepthPitch);
+            const T *src3 = GetPixel<T>(sourceData, x * 2 + 1, 0, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+            T *dst = GetPixel<T>(destData, x, 0, z, destRowPitch, destDepthPitch);
+
+            T tmp0, tmp1;
+
+            T::average(&tmp0, src0, src1);
+            T::average(&tmp1, src2, src3);
+            T::average(dst, &tmp0, &tmp1);
+        }
+    }
+}
+
+template <typename T>
+static void GenerateMip_XYZ(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                            const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                            size_t destWidth, size_t destHeight, size_t destDepth,
+                            uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    ASSERT(sourceWidth > 1);
+    ASSERT(sourceHeight > 1);
+    ASSERT(sourceDepth > 1);
+
+    for (size_t z = 0; z < destDepth; z++)
+    {
+        for (size_t y = 0; y < destHeight; y++)
+        {
+            for (size_t x = 0; x < destWidth; x++)
+            {
+                const T *src0 = GetPixel<T>(sourceData, x * 2, y * 2, z * 2, sourceRowPitch, sourceDepthPitch);
+                const T *src1 = GetPixel<T>(sourceData, x * 2, y * 2, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+                const T *src2 = GetPixel<T>(sourceData, x * 2, y * 2 + 1, z * 2, sourceRowPitch, sourceDepthPitch);
+                const T *src3 = GetPixel<T>(sourceData, x * 2, y * 2 + 1, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+                const T *src4 = GetPixel<T>(sourceData, x * 2 + 1, y * 2, z * 2, sourceRowPitch, sourceDepthPitch);
+                const T *src5 = GetPixel<T>(sourceData, x * 2 + 1, y * 2, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+                const T *src6 = GetPixel<T>(sourceData, x * 2 + 1, y * 2 + 1, z * 2, sourceRowPitch, sourceDepthPitch);
+                const T *src7 = GetPixel<T>(sourceData, x * 2 + 1, y * 2 + 1, z * 2 + 1, sourceRowPitch, sourceDepthPitch);
+                T *dst = GetPixel<T>(destData, x, y, z, destRowPitch, destDepthPitch);
+
+                T tmp0, tmp1, tmp2, tmp3, tmp4, tmp5;
+
+                T::average(&tmp0, src0, src1);
+                T::average(&tmp1, src2, src3);
+                T::average(&tmp2, src4, src5);
+                T::average(&tmp3, src6, src7);
+
+                T::average(&tmp4, &tmp0, &tmp1);
+                T::average(&tmp5, &tmp2, &tmp3);
+
+                T::average(dst, &tmp4, &tmp5);
+            }
+        }
+    }
+}
+
+
+typedef void (*MipGenerationFunction)(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                                      const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                                      size_t destWidth, size_t destHeight, size_t destDepth,
+                                      uint8_t *destData, size_t destRowPitch, size_t destDepthPitch);
+
+template <typename T>
+static MipGenerationFunction GetMipGenerationFunction(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth)
+{
+    uint8_t index = ((sourceWidth > 1)  ? 1 : 0) |
+                    ((sourceHeight > 1) ? 2 : 0) |
+                    ((sourceDepth > 1)  ? 4 : 0);
+
+    switch (index)
+    {
+      case 0: return NULL;
+      case 1: return GenerateMip_X<T>;   // W x 1 x 1
+      case 2: return GenerateMip_Y<T>;   // 1 x H x 1
+      case 3: return GenerateMip_XY<T>;  // W x H x 1
+      case 4: return GenerateMip_Z<T>;   // 1 x 1 x D
+      case 5: return GenerateMip_XZ<T>;  // W x 1 x D
+      case 6: return GenerateMip_YZ<T>;  // 1 x H x D
+      case 7: return GenerateMip_XYZ<T>; // W x H x D
+    }
+
+    UNREACHABLE();
+    return NULL;
+}
+
+}
+
+template <typename T>
+inline void GenerateMip(size_t sourceWidth, size_t sourceHeight, size_t sourceDepth,
+                        const uint8_t *sourceData, size_t sourceRowPitch, size_t sourceDepthPitch,
+                        uint8_t *destData, size_t destRowPitch, size_t destDepthPitch)
+{
+    size_t mipWidth = std::max<size_t>(1, sourceWidth >> 1);
+    size_t mipHeight = std::max<size_t>(1, sourceHeight >> 1);
+    size_t mipDepth = std::max<size_t>(1, sourceDepth >> 1);
+
+    priv::MipGenerationFunction generationFunction = priv::GetMipGenerationFunction<T>(sourceWidth, sourceHeight, sourceDepth);
+    ASSERT(generationFunction != NULL);
+
+    generationFunction(sourceWidth, sourceHeight, sourceDepth, sourceData, sourceRowPitch, sourceDepthPitch,
+                       mipWidth, mipHeight, mipDepth, destData, destRowPitch, destDepthPitch);
+}
+
+}