text: //
  // Copyright (c) 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.
  //
  
  #include "gmock/gmock.h"
  #include "gtest/gtest.h"
  
  #include "common/utilities.h"
  #include "libANGLE/ImageIndex.h"
  
  using namespace gl;
  
  namespace
  {
  
  static const GLint minMip = 0;
  static const GLint maxMip = 4;
  static const GLint minLayer = 1;
  static const GLint maxLayer = 3;
  
  TEST(ImageIndexTest, Iterator2D)
  {
      ImageIndexIterator iter = ImageIndexIterator::Make2D(minMip, maxMip);
  
      ASSERT_GE(0, minMip);
  
      for (GLint mip = minMip; mip < maxMip; mip++)
      {
          EXPECT_TRUE(iter.hasNext());
          ImageIndex current = iter.current();
          ImageIndex nextIndex = iter.next();
  
          EXPECT_EQ(static_cast<GLenum>(GL_TEXTURE_2D), nextIndex.type);
          EXPECT_EQ(mip, nextIndex.mipIndex);
          EXPECT_FALSE(nextIndex.hasLayer());
  
          // Also test current
          EXPECT_EQ(current.type, nextIndex.type);
          EXPECT_EQ(current.mipIndex, nextIndex.mipIndex);
          EXPECT_EQ(current.layerIndex, nextIndex.layerIndex);
      }
  }
  
  TEST(ImageIndexTest, IteratorCube)
  {
      ImageIndexIterator iter = ImageIndexIterator::MakeCube(0, 4);
  
      ASSERT_GE(0, minMip);
  
      for (GLint mip = minMip; mip < maxMip; mip++)
      {
          for (GLint layer = 0; layer < 6; layer++)
          {
              EXPECT_TRUE(iter.hasNext());
              ImageIndex nextIndex = iter.next();
  
              GLenum cubeTarget = LayerIndexToCubeMapTextureTarget(layer);
  
              EXPECT_EQ(cubeTarget, nextIndex.type);
              EXPECT_EQ(mip, nextIndex.mipIndex);
              EXPECT_EQ(layer, nextIndex.layerIndex);
              EXPECT_TRUE(nextIndex.hasLayer());
          }
      }
  }
  
  TEST(ImageIndexTest, Iterator3D)
  {
      ImageIndexIterator iter = ImageIndexIterator::Make3D(minMip, maxMip, minLayer, maxLayer);
  
      ASSERT_GE(0, minMip);
  
      for (GLint mip = minMip; mip < maxMip; mip++)
      {
          for (GLint layer = minLayer; layer < maxLayer; layer++)
          {
              EXPECT_TRUE(iter.hasNext());
              ImageIndex nextIndex = iter.next();
  
              EXPECT_EQ(static_cast<GLenum>(GL_TEXTURE_3D), nextIndex.type);
              EXPECT_EQ(mip, nextIndex.mipIndex);
              EXPECT_EQ(layer, nextIndex.layerIndex);
              EXPECT_TRUE(nextIndex.hasLayer());
          }
      }
  }
  
  TEST(ImageIndexTest, Iterator2DArray)
  {
      GLsizei layerCounts[] = { 1, 3, 5, 2 };
  
      ImageIndexIterator iter = ImageIndexIterator::Make2DArray(minMip, maxMip, layerCounts);
  
      ASSERT_GE(0, minMip);
      ASSERT_EQ(ArraySize(layerCounts), static_cast<size_t>(maxMip));
  
      for (GLint mip = minMip; mip < maxMip; mip++)
      {
          for (GLint layer = 0; layer < layerCounts[mip]; layer++)
          {
              EXPECT_TRUE(iter.hasNext());
              ImageIndex nextIndex = iter.next();
  
              EXPECT_EQ(static_cast<GLenum>(GL_TEXTURE_2D_ARRAY), nextIndex.type);
              EXPECT_EQ(mip, nextIndex.mipIndex);
              EXPECT_EQ(layer, nextIndex.layerIndex);
              EXPECT_TRUE(nextIndex.hasLayer());
          }
      }
  }
  
  } // namespace
  