Use nine-patch resource for drawing Aura overlay scrollbar thumb.

cc/quads/nine_patch_generator_unittest.cc

Index: cc/quads/nine_patch_generator_unittest.cc
diff --git a/cc/quads/nine_patch_generator_unittest.cc b/cc/quads/nine_patch_generator_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a0625f2ce51d05acd7bf303e4531b06d8ef6a1ac
--- /dev/null
+++ b/cc/quads/nine_patch_generator_unittest.cc
@@ -0,0 +1,237 @@
+// Copyright 2017 The Chromium 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 "cc/quads/nine_patch_generator.h"
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/size.h"
+
+namespace cc {
+namespace {
+
+TEST(NinePatchGeneratorTest, SetLayoutReturnsChanged) {
+  NinePatchGenerator quad_generator;
+
+  EXPECT_TRUE(quad_generator.SetLayout(
+      gfx::Size(10, 10), gfx::Size(10, 10), gfx::Rect(1, 1, 8, 8),
+      gfx::Rect(1, 1, 2, 2), gfx::Rect(), true, false));
+
+  EXPECT_FALSE(quad_generator.SetLayout(
+      gfx::Size(10, 10), gfx::Size(10, 10), gfx::Rect(1, 1, 8, 8),
+      gfx::Rect(1, 1, 2, 2), gfx::Rect(), true, false));
+
+  EXPECT_TRUE(quad_generator.SetLayout(
+      gfx::Size(10, 10), gfx::Size(10, 10), gfx::Rect(1, 1, 8, 8),
+      gfx::Rect(1, 1, 2, 2), gfx::Rect(), false, false));
+
+  EXPECT_FALSE(quad_generator.SetLayout(
+      gfx::Size(10, 10), gfx::Size(10, 10), gfx::Rect(1, 1, 8, 8),
+      gfx::Rect(1, 1, 2, 2), gfx::Rect(), false, false));
+
+  EXPECT_TRUE(quad_generator.SetLayout(
+      gfx::Size(12, 10), gfx::Size(10, 10), gfx::Rect(1, 1, 8, 8),
+      gfx::Rect(1, 1, 2, 2), gfx::Rect(), false, false));
+}
+
+TEST(NinePatchGeneratorTest, BasicGenerate) {
+  NinePatchGenerator quad_generator;
+
+  quad_generator.SetLayout(gfx::Size(10, 10), gfx::Size(10, 10),
+                           gfx::Rect(1, 1, 8, 8), gfx::Rect(1, 1, 2, 2),
+                           gfx::Rect(), true, false);
+
+  std::vector<NinePatchGenerator::Patch> patches =
+      quad_generator.GeneratePatches();
+
+  ASSERT_EQ(9u, patches.size());
+
+  // Center.
+  EXPECT_EQ(gfx::RectF(1, 1, 8, 8), patches[8].image_rect);
+  EXPECT_EQ(gfx::RectF(1, 1, 8, 8), patches[8].output_rect);
+  EXPECT_EQ(gfx::RectF(0.1f, 0.1f, 0.8f, 0.8f),
+            patches[8].normalized_image_rect);
+
+  // Bottom.
+  EXPECT_EQ(gfx::RectF(1, 9, 8, 1), patches[7].image_rect);
+  EXPECT_EQ(gfx::RectF(1, 9, 8, 1), patches[7].output_rect);
+  EXPECT_EQ(gfx::RectF(0.1f, 0.9f, 0.8f, 0.1f),
+            patches[7].normalized_image_rect);
+
+  // Right.
+  EXPECT_EQ(gfx::RectF(9, 1, 1, 8), patches[6].image_rect);
+  EXPECT_EQ(gfx::RectF(9, 1, 1, 8), patches[6].output_rect);
+  EXPECT_EQ(gfx::RectF(0.9f, 0.1f, 0.1f, 0.8f),
+            patches[6].normalized_image_rect);
+
+  // Left.
+  EXPECT_EQ(gfx::RectF(0, 1, 1, 8), patches[5].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 1, 1, 8), patches[5].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.1f, 0.1f, 0.8f),
+            patches[5].normalized_image_rect);
+
+  // Top.
+  EXPECT_EQ(gfx::RectF(1, 0, 8, 1), patches[4].image_rect);
+  EXPECT_EQ(gfx::RectF(1, 0, 8, 1), patches[4].output_rect);
+  EXPECT_EQ(gfx::RectF(0.1f, 0.f, 0.8f, 0.1f),
+            patches[4].normalized_image_rect);
+
+  // Bottom-right
+  EXPECT_EQ(gfx::RectF(9, 9, 1, 1), patches[3].image_rect);
+  EXPECT_EQ(gfx::RectF(9, 9, 1, 1), patches[3].output_rect);
+  EXPECT_EQ(gfx::RectF(0.9f, 0.9f, 0.1f, 0.1f),
+            patches[3].normalized_image_rect);
+
+  // Bottom-left
+  EXPECT_EQ(gfx::RectF(0, 9, 1, 1), patches[2].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 9, 1, 1), patches[2].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.9f, 0.1f, 0.1f),
+            patches[2].normalized_image_rect);
+
+  // Top-right
+  EXPECT_EQ(gfx::RectF(9, 0, 1, 1), patches[1].image_rect);
+  EXPECT_EQ(gfx::RectF(9, 0, 1, 1), patches[1].output_rect);
+  EXPECT_EQ(gfx::RectF(0.9f, 0.f, 0.1f, 0.1f),
+            patches[1].normalized_image_rect);
+
+  // Top-left
+  EXPECT_EQ(gfx::RectF(0, 0, 1, 1), patches[0].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 0, 1, 1), patches[0].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.f, 0.1f, 0.1f), patches[0].normalized_image_rect);
+}
+
+TEST(NinePatchGeneratorTest, GenerateNonSymmetricAperture) {
+  NinePatchGenerator quad_generator;
+
+  quad_generator.SetLayout(gfx::Size(10, 10), gfx::Size(10, 10),
+                           gfx::Rect(3, 5, 2, 2), gfx::Rect(2, 4, 4, 8),
+                           gfx::Rect(), true, false);
+
+  std::vector<NinePatchGenerator::Patch> patches =
+      quad_generator.GeneratePatches();
+
+  ASSERT_EQ(9u, patches.size());
+
+  // Center.
+  EXPECT_EQ(gfx::RectF(3, 5, 2, 2), patches[8].image_rect);
+  EXPECT_EQ(gfx::RectF(2, 4, 6, 2), patches[8].output_rect);
+  EXPECT_EQ(gfx::RectF(0.3f, 0.5f, 0.2f, 0.2f),
+            patches[8].normalized_image_rect);
+
+  // Bottom.
+  EXPECT_EQ(gfx::RectF(3, 7, 2, 3), patches[7].image_rect);
+  EXPECT_EQ(gfx::RectF(2, 6, 6, 4), patches[7].output_rect);
+  EXPECT_EQ(gfx::RectF(0.3f, 0.7f, 0.2f, 0.3f),
+            patches[7].normalized_image_rect);
+
+  // Right.
+  EXPECT_EQ(gfx::RectF(5, 5, 5, 2), patches[6].image_rect);
+  EXPECT_EQ(gfx::RectF(8, 4, 2, 2), patches[6].output_rect);
+  EXPECT_EQ(gfx::RectF(0.5f, 0.5f, 0.5f, 0.2f),
+            patches[6].normalized_image_rect);
+
+  // Left.
+  EXPECT_EQ(gfx::RectF(0, 5, 3, 2), patches[5].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 4, 2, 2), patches[5].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.5f, 0.3f, 0.2f),
+            patches[5].normalized_image_rect);
+
+  // Top.
+  EXPECT_EQ(gfx::RectF(3, 0, 2, 5), patches[4].image_rect);
+  EXPECT_EQ(gfx::RectF(2, 0, 6, 4), patches[4].output_rect);
+  EXPECT_EQ(gfx::RectF(0.3f, 0.f, 0.2f, 0.5f),
+            patches[4].normalized_image_rect);
+
+  // Bottom-right
+  EXPECT_EQ(gfx::RectF(5, 7, 5, 3), patches[3].image_rect);
+  EXPECT_EQ(gfx::RectF(8, 6, 2, 4), patches[3].output_rect);
+  EXPECT_EQ(gfx::RectF(0.5f, 0.7f, 0.5f, 0.3f),
+            patches[3].normalized_image_rect);
+
+  // Bottom-left
+  EXPECT_EQ(gfx::RectF(0, 7, 3, 3), patches[2].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 6, 2, 4), patches[2].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.7f, 0.3f, 0.3f),
+            patches[2].normalized_image_rect);
+
+  // Top-right
+  EXPECT_EQ(gfx::RectF(5, 0, 5, 5), patches[1].image_rect);
+  EXPECT_EQ(gfx::RectF(8, 0, 2, 4), patches[1].output_rect);
+  EXPECT_EQ(gfx::RectF(0.5f, 0.f, 0.5f, 0.5f),
+            patches[1].normalized_image_rect);
+
+  // Top-left
+  EXPECT_EQ(gfx::RectF(0, 0, 3, 5), patches[0].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 0, 2, 4), patches[0].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.f, 0.3f, 0.5f), patches[0].normalized_image_rect);
+}
+
+TEST(NinePatchGeneratorTest, LargerLayerGenerate) {
+  NinePatchGenerator quad_generator;
+
+  quad_generator.SetLayout(gfx::Size(10, 10), gfx::Size(20, 15),
+                           gfx::Rect(1, 1, 8, 8), gfx::Rect(1, 1, 2, 2),
+                           gfx::Rect(), true, false);
+
+  std::vector<NinePatchGenerator::Patch> patches =
+      quad_generator.GeneratePatches();
+
+  ASSERT_EQ(9u, patches.size());
+
+  // Center.
+  EXPECT_EQ(gfx::RectF(1, 1, 8, 8), patches[8].image_rect);
+  EXPECT_EQ(gfx::RectF(1, 1, 18, 13), patches[8].output_rect);
+  EXPECT_EQ(gfx::RectF(0.1f, 0.1f, 0.8f, 0.8f),
+            patches[8].normalized_image_rect);
+
+  // Bottom.
+  EXPECT_EQ(gfx::RectF(1, 9, 8, 1), patches[7].image_rect);
+  EXPECT_EQ(gfx::RectF(1, 14, 18, 1), patches[7].output_rect);
+  EXPECT_EQ(gfx::RectF(0.1f, 0.9f, 0.8f, 0.1f),
+            patches[7].normalized_image_rect);
+
+  // Right.
+  EXPECT_EQ(gfx::RectF(9, 1, 1, 8), patches[6].image_rect);
+  EXPECT_EQ(gfx::RectF(19, 1, 1, 13), patches[6].output_rect);
+  EXPECT_EQ(gfx::RectF(0.9f, 0.1f, 0.1f, 0.8f),
+            patches[6].normalized_image_rect);
+
+  // Left.
+  EXPECT_EQ(gfx::RectF(0, 1, 1, 8), patches[5].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 1, 1, 13), patches[5].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.1f, 0.1f, 0.8f),
+            patches[5].normalized_image_rect);
+
+  // Top.
+  EXPECT_EQ(gfx::RectF(1, 0, 8, 1), patches[4].image_rect);
+  EXPECT_EQ(gfx::RectF(1, 0, 18, 1), patches[4].output_rect);
+  EXPECT_EQ(gfx::RectF(0.1f, 0.f, 0.8f, 0.1f),
+            patches[4].normalized_image_rect);
+
+  // Bottom-right
+  EXPECT_EQ(gfx::RectF(9, 9, 1, 1), patches[3].image_rect);
+  EXPECT_EQ(gfx::RectF(19, 14, 1, 1), patches[3].output_rect);
+  EXPECT_EQ(gfx::RectF(0.9f, 0.9f, 0.1f, 0.1f),
+            patches[3].normalized_image_rect);
+
+  // Bottom-left
+  EXPECT_EQ(gfx::RectF(0, 9, 1, 1), patches[2].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 14, 1, 1), patches[2].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.9f, 0.1f, 0.1f),
+            patches[2].normalized_image_rect);
+
+  // Top-right
+  EXPECT_EQ(gfx::RectF(9, 0, 1, 1), patches[1].image_rect);
+  EXPECT_EQ(gfx::RectF(19, 0, 1, 1), patches[1].output_rect);
+  EXPECT_EQ(gfx::RectF(0.9f, 0.f, 0.1f, 0.1f),
+            patches[1].normalized_image_rect);
+
+  // Top-left
+  EXPECT_EQ(gfx::RectF(0, 0, 1, 1), patches[0].image_rect);
+  EXPECT_EQ(gfx::RectF(0, 0, 1, 1), patches[0].output_rect);
+  EXPECT_EQ(gfx::RectF(0.f, 0.f, 0.1f, 0.1f), patches[0].normalized_image_rect);
+}
+
+}  // namespace
+}  // namespace cc