Add detection for rotation and flip overlay transforms

cc/output/overlay_unittest.cc

 // Copyright 2014 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/base/scoped_ptr_vector.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/gl_renderer.h"
 #include "cc/output/output_surface.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/overlay_candidate_validator.h"
@@ skipping 43 matching lines @@
 class SingleOverlayValidator : public OverlayCandidateValidator {
  public:
   void CheckOverlaySupport(OverlayCandidateList* surfaces) override;
 };
 
 void SingleOverlayValidator::CheckOverlaySupport(
     OverlayCandidateList* surfaces) {
   ASSERT_EQ(2U, surfaces->size());
 
   OverlayCandidate& candidate = surfaces->back();
-  if (candidate.display_rect.width() == 64)
+  if (candidate.display_rect.width() == 64) {
     EXPECT_EQ(kOverlayBottomRightRect, candidate.display_rect);
-  else
-    EXPECT_EQ(kOverlayRect, candidate.display_rect);
+  } else {
+    EXPECT_NEAR(kOverlayRect.x(), candidate.display_rect.x(), 0.01f);
+    EXPECT_NEAR(kOverlayRect.y(), candidate.display_rect.y(), 0.01f);
+    EXPECT_NEAR(kOverlayRect.width(), candidate.display_rect.width(), 0.01f);
+    EXPECT_NEAR(kOverlayRect.height(), candidate.display_rect.height(), 0.01f);
+  }
   EXPECT_EQ(BoundingRect(kUVTopLeft, kUVBottomRight).ToString(),
             candidate.uv_rect.ToString());
   candidate.overlay_handled = true;
 }
 
 template <typename OverlayStrategyType>
 class SingleOverlayProcessor : public OverlayProcessor {
  public:
   SingleOverlayProcessor(OutputSurface* surface,
                          ResourceProvider* resource_provider)
@@ skipping 455 matching lines @@
   pass->shared_quad_state_list.back()->opacity = 0.5f;
 
   RenderPassList pass_list;
   pass_list.push_back(pass.Pass());
   OverlayCandidateList candidate_list;
   overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
   ASSERT_EQ(1U, pass_list.size());
   EXPECT_EQ(0U, candidate_list.size());
 }
 
-TEST_F(SingleOverlayOnTopTest, RejectNonScaleTransform) {
+TEST_F(SingleOverlayOnTopTest, RejectNonAxisAlignedTransform) {
   scoped_ptr<RenderPass> pass = CreateRenderPass();
   CreateFullscreenCandidateQuad(resource_provider_.get(),
                                 pass->shared_quad_state_list.back(),
                                 pass.get());
   pass->shared_quad_state_list.back()
       ->content_to_target_transform.RotateAboutXAxis(45.f);
 
   RenderPassList pass_list;
   pass_list.push_back(pass.Pass());
   OverlayCandidateList candidate_list;
   overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
   ASSERT_EQ(1U, pass_list.size());
   EXPECT_EQ(0U, candidate_list.size());
 }
 
-TEST_F(SingleOverlayOnTopTest, RejectNegativeScaleTransform) {
+TEST_F(SingleOverlayOnTopTest, AllowVerticalFlip) {
+  gfx::Rect rect = kOverlayRect;
+  rect.set_width(rect.width() / 2);
+  rect.Offset(0, -rect.height());
   scoped_ptr<RenderPass> pass = CreateRenderPass();
-  CreateFullscreenCandidateQuad(resource_provider_.get(),
-                                pass->shared_quad_state_list.back(),
-                                pass.get());
+  CreateCandidateQuadAt(resource_provider_.get(),
+                        pass->shared_quad_state_list.back(), pass.get(), rect);
   pass->shared_quad_state_list.back()->content_to_target_transform.Scale(2.0f,
                                                                          -1.0f);
 
   RenderPassList pass_list;
   pass_list.push_back(pass.Pass());
   OverlayCandidateList candidate_list;
   overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
   ASSERT_EQ(1U, pass_list.size());
-  EXPECT_EQ(0U, candidate_list.size());
+  ASSERT_EQ(2U, candidate_list.size());
+  EXPECT_EQ(gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL,
+            candidate_list.back().transform);
+}
+
+TEST_F(SingleOverlayOnTopTest, AllowHorizontalFlip) {
+  gfx::Rect rect = kOverlayRect;
+  rect.set_height(rect.height() / 2);
+  rect.Offset(-rect.width(), 0);
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateCandidateQuadAt(resource_provider_.get(),
+                        pass->shared_quad_state_list.back(), pass.get(), rect);
+  pass->shared_quad_state_list.back()->content_to_target_transform.Scale(-1.0f,
+                                                                         2.0f);
+
+  RenderPassList pass_list;
+  pass_list.push_back(pass.Pass());
+  OverlayCandidateList candidate_list;
+  overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
+  ASSERT_EQ(1U, pass_list.size());
+  ASSERT_EQ(2U, candidate_list.size());
+  EXPECT_EQ(gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL,
+            candidate_list.back().transform);
 }
 
 TEST_F(SingleOverlayOnTopTest, AllowPositiveScaleTransform) {
   gfx::Rect rect = kOverlayRect;
   rect.set_width(rect.width() / 2);
   scoped_ptr<RenderPass> pass = CreateRenderPass();
   CreateCandidateQuadAt(resource_provider_.get(),
                         pass->shared_quad_state_list.back(), pass.get(), rect);
   pass->shared_quad_state_list.back()->content_to_target_transform.Scale(2.0f,
                                                                          1.0f);
 
   RenderPassList pass_list;
   pass_list.push_back(pass.Pass());
   OverlayCandidateList candidate_list;
   overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
   ASSERT_EQ(1U, pass_list.size());
   EXPECT_EQ(2U, candidate_list.size());
 }
 
+TEST_F(SingleOverlayOnTopTest, Allow90DegreeRotation) {
+  gfx::Rect rect = kOverlayRect;
+  rect.Offset(0, -rect.height());
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateCandidateQuadAt(resource_provider_.get(),
+                        pass->shared_quad_state_list.back(), pass.get(), rect);
+  pass->shared_quad_state_list.back()
+      ->content_to_target_transform.RotateAboutZAxis(90.f);
+
+  RenderPassList pass_list;
+  pass_list.push_back(pass.Pass());
+  OverlayCandidateList candidate_list;
+  overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
+  ASSERT_EQ(1U, pass_list.size());
+  ASSERT_EQ(2U, candidate_list.size());
+  EXPECT_EQ(gfx::OVERLAY_TRANSFORM_ROTATE_90, candidate_list.back().transform);
+}
+
+TEST_F(SingleOverlayOnTopTest, Allow180DegreeRotation) {
+  gfx::Rect rect = kOverlayRect;
+  rect.Offset(-rect.width(), -rect.height());
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateCandidateQuadAt(resource_provider_.get(),
+                        pass->shared_quad_state_list.back(), pass.get(), rect);
+  pass->shared_quad_state_list.back()
+      ->content_to_target_transform.RotateAboutZAxis(180.f);
+
+  RenderPassList pass_list;
+  pass_list.push_back(pass.Pass());
+  OverlayCandidateList candidate_list;
+  overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
+  ASSERT_EQ(1U, pass_list.size());
+  ASSERT_EQ(2U, candidate_list.size());
+  EXPECT_EQ(gfx::OVERLAY_TRANSFORM_ROTATE_180, candidate_list.back().transform);
+}
+
+TEST_F(SingleOverlayOnTopTest, Allow270DegreeRotation) {
+  gfx::Rect rect = kOverlayRect;
+  rect.Offset(-rect.width(), 0);
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateCandidateQuadAt(resource_provider_.get(),
+                        pass->shared_quad_state_list.back(), pass.get(), rect);
+  pass->shared_quad_state_list.back()
+      ->content_to_target_transform.RotateAboutZAxis(270.f);
+
+  RenderPassList pass_list;
+  pass_list.push_back(pass.Pass());
+  OverlayCandidateList candidate_list;
+  overlay_processor_->ProcessForOverlays(&pass_list, &candidate_list);
+  ASSERT_EQ(1U, pass_list.size());
+  ASSERT_EQ(2U, candidate_list.size());
+  EXPECT_EQ(gfx::OVERLAY_TRANSFORM_ROTATE_270, candidate_list.back().transform);
+}
+
 TEST_F(SingleOverlayOnTopTest, AllowNotTopIfNotOccluded) {
   scoped_ptr<RenderPass> pass = CreateRenderPass();
   CreateCheckeredQuadAt(resource_provider_.get(),
                         pass->shared_quad_state_list.back(),
                         pass.get(),
                         kOverlayTopLeftRect);
   CreateCandidateQuadAt(resource_provider_.get(),
                         pass->shared_quad_state_list.back(),
                         pass.get(),
                         kOverlayBottomRightRect);
@@ skipping 504 matching lines @@
   renderer_->BeginDrawingFrame(&frame3);
   renderer_->FinishDrawingFrame(&frame3);
   EXPECT_TRUE(resource_provider_->InUseByConsumer(resource1));
   SwapBuffers();
   EXPECT_FALSE(resource_provider_->InUseByConsumer(resource1));
   Mock::VerifyAndClearExpectations(&scheduler_);
 }
 
 }  // namespace
 }  // namespace cc