1 files changed, 207 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/ImageIndex.cpp b/gfx/angle/src/libANGLE/ImageIndex.cpp
new file mode 100755
index 000000000..f74ce19d9
--- /dev/null
+++ b/gfx/angle/src/libANGLE/ImageIndex.cpp
@@ -0,0 +1,207 @@
+//
+// Copyright 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.
+//
+
+// ImageIndex.cpp: Implementation for ImageIndex methods.
+
+#include "libANGLE/ImageIndex.h"
+#include "libANGLE/Constants.h"
+#include "common/utilities.h"
+
+namespace gl
+{
+
+ImageIndex::ImageIndex(const ImageIndex &other)
+    : type(other.type),
+      mipIndex(other.mipIndex),
+      layerIndex(other.layerIndex)
+{}
+
+ImageIndex &ImageIndex::operator=(const ImageIndex &other)
+{
+    type = other.type;
+    mipIndex = other.mipIndex;
+    layerIndex = other.layerIndex;
+    return *this;
+}
+
+bool ImageIndex::is3D() const
+{
+    return type == GL_TEXTURE_3D || type == GL_TEXTURE_2D_ARRAY;
+}
+
+ImageIndex ImageIndex::Make2D(GLint mipIndex)
+{
+    return ImageIndex(GL_TEXTURE_2D, mipIndex, ENTIRE_LEVEL);
+}
+
+ImageIndex ImageIndex::MakeCube(GLenum target, GLint mipIndex)
+{
+    ASSERT(gl::IsCubeMapTextureTarget(target));
+    return ImageIndex(target, mipIndex,
+                      static_cast<GLint>(CubeMapTextureTargetToLayerIndex(target)));
+}
+
+ImageIndex ImageIndex::Make2DArray(GLint mipIndex, GLint layerIndex)
+{
+    return ImageIndex(GL_TEXTURE_2D_ARRAY, mipIndex, layerIndex);
+}
+
+ImageIndex ImageIndex::Make3D(GLint mipIndex, GLint layerIndex)
+{
+    return ImageIndex(GL_TEXTURE_3D, mipIndex, layerIndex);
+}
+
+ImageIndex ImageIndex::MakeGeneric(GLenum target, GLint mipIndex)
+{
+    GLint layerIndex = IsCubeMapTextureTarget(target)
+                           ? static_cast<GLint>(CubeMapTextureTargetToLayerIndex(target))
+                           : ENTIRE_LEVEL;
+    return ImageIndex(target, mipIndex, layerIndex);
+}
+
+ImageIndex ImageIndex::MakeInvalid()
+{
+    return ImageIndex(GL_NONE, -1, -1);
+}
+
+bool ImageIndex::operator<(const ImageIndex &other) const
+{
+    if (type != other.type)
+    {
+        return type < other.type;
+    }
+    else if (mipIndex != other.mipIndex)
+    {
+        return mipIndex < other.mipIndex;
+    }
+    else
+    {
+        return layerIndex < other.layerIndex;
+    }
+}
+
+bool ImageIndex::operator==(const ImageIndex &other) const
+{
+    return (type == other.type) && (mipIndex == other.mipIndex) && (layerIndex == other.layerIndex);
+}
+
+bool ImageIndex::operator!=(const ImageIndex &other) const
+{
+    return !(*this == other);
+}
+
+ImageIndex::ImageIndex(GLenum typeIn, GLint mipIndexIn, GLint layerIndexIn)
+    : type(typeIn),
+      mipIndex(mipIndexIn),
+      layerIndex(layerIndexIn)
+{}
+
+ImageIndexIterator ImageIndexIterator::Make2D(GLint minMip, GLint maxMip)
+{
+    return ImageIndexIterator(GL_TEXTURE_2D, Range<GLint>(minMip, maxMip),
+                              Range<GLint>(ImageIndex::ENTIRE_LEVEL, ImageIndex::ENTIRE_LEVEL), NULL);
+}
+
+ImageIndexIterator ImageIndexIterator::MakeCube(GLint minMip, GLint maxMip)
+{
+    return ImageIndexIterator(GL_TEXTURE_CUBE_MAP, Range<GLint>(minMip, maxMip), Range<GLint>(0, 6), NULL);
+}
+
+ImageIndexIterator ImageIndexIterator::Make3D(GLint minMip, GLint maxMip,
+                                              GLint minLayer, GLint maxLayer)
+{
+    return ImageIndexIterator(GL_TEXTURE_3D, Range<GLint>(minMip, maxMip), Range<GLint>(minLayer, maxLayer), NULL);
+}
+
+ImageIndexIterator ImageIndexIterator::Make2DArray(GLint minMip, GLint maxMip,
+                                                   const GLsizei *layerCounts)
+{
+    return ImageIndexIterator(GL_TEXTURE_2D_ARRAY, Range<GLint>(minMip, maxMip),
+                              Range<GLint>(0, IMPLEMENTATION_MAX_2D_ARRAY_TEXTURE_LAYERS), layerCounts);
+}
+
+ImageIndexIterator::ImageIndexIterator(GLenum type, const Range<GLint> &mipRange,
+                                       const Range<GLint> &layerRange, const GLsizei *layerCounts)
+    : mType(type),
+      mMipRange(mipRange),
+      mLayerRange(layerRange),
+      mLayerCounts(layerCounts),
+      mCurrentMip(mipRange.start),
+      mCurrentLayer(layerRange.start)
+{}
+
+GLint ImageIndexIterator::maxLayer() const
+{
+    if (mLayerCounts)
+    {
+        ASSERT(mCurrentMip >= 0);
+        return (mCurrentMip < mMipRange.end) ? mLayerCounts[mCurrentMip] : 0;
+    }
+    return mLayerRange.end;
+}
+
+ImageIndex ImageIndexIterator::next()
+{
+    ASSERT(hasNext());
+
+    ImageIndex value = current();
+
+    // Iterate layers in the inner loop for now. We can add switchable
+    // layer or mip iteration if we need it.
+
+    if (mCurrentLayer != ImageIndex::ENTIRE_LEVEL)
+    {
+        if (mCurrentLayer < maxLayer() - 1)
+        {
+            mCurrentLayer++;
+        }
+        else if (mCurrentMip < mMipRange.end - 1)
+        {
+            mCurrentMip++;
+            mCurrentLayer = mLayerRange.start;
+        }
+        else
+        {
+            done();
+        }
+    }
+    else if (mCurrentMip < mMipRange.end - 1)
+    {
+        mCurrentMip++;
+        mCurrentLayer = mLayerRange.start;
+    }
+    else
+    {
+        done();
+    }
+
+    return value;
+}
+
+ImageIndex ImageIndexIterator::current() const
+{
+    ImageIndex value(mType, mCurrentMip, mCurrentLayer);
+
+    if (mType == GL_TEXTURE_CUBE_MAP)
+    {
+        value.type = LayerIndexToCubeMapTextureTarget(mCurrentLayer);
+    }
+
+    return value;
+}
+
+bool ImageIndexIterator::hasNext() const
+{
+    return (mCurrentMip < mMipRange.end || mCurrentLayer < maxLayer());
+}
+
+void ImageIndexIterator::done()
+{
+    mCurrentMip   = mMipRange.end;
+    mCurrentLayer = maxLayer();
+}
+
+}  // namespace gl