Part 1/3 (compositor) of adding with device scale factor to transport surfaces

cc/trees/layer_tree_host_impl_unittest.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <cmath>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 2645 matching lines @@
 
     LayerTestCommon::VerifyQuadsExactlyCoverRect(
         frame.render_passes[0]->quad_list, gfx::Rect(viewport_size));
     host_impl_->DidDrawAllLayers(frame);
   }
 }
 
 
 class ReshapeTrackerContext: public TestWebGraphicsContext3D {
  public:
-  ReshapeTrackerContext() : reshape_called_(false) {}
+  ReshapeTrackerContext()
+    : reshape_called_(false),
+      last_reshape_width_(-1),
+      last_reshape_height_(-1),
+      last_reshape_scale_factor_(-1.f) {
+  }
 
-  virtual void reshape(int width, int height) OVERRIDE {
+  virtual void reshapeWithScaleFactor(
+      int width, int height, float scale_factor) OVERRIDE {
     reshape_called_ = true;
+    last_reshape_width_ = width;
+    last_reshape_height_ = height;
+    last_reshape_scale_factor_ = scale_factor;
   }
 
   bool reshape_called() const { return reshape_called_; }
+  void clear_reshape_called() { reshape_called_ = false; }
+  int last_reshape_width() { return last_reshape_width_; }
+  int last_reshape_height() { return last_reshape_height_; }
+  int last_reshape_scale_factor() { return last_reshape_scale_factor_; }
 
  private:
   bool reshape_called_;
+  int last_reshape_width_;
+  int last_reshape_height_;
+  float last_reshape_scale_factor_;
 };
 
 class FakeDrawableLayerImpl: public LayerImpl {
  public:
   static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
     return scoped_ptr<LayerImpl>(new FakeDrawableLayerImpl(tree_impl, id));
   }
  protected:
   FakeDrawableLayerImpl(LayerTreeImpl* tree_impl, int id)
       : LayerImpl(tree_impl, id) {}
@@ skipping 11 matching lines @@
   host_impl_->InitializeRenderer(output_surface.Pass());
 
   scoped_ptr<LayerImpl> root =
       FakeDrawableLayerImpl::Create(host_impl_->active_tree(), 1);
   root->SetAnchorPoint(gfx::PointF());
   root->SetBounds(gfx::Size(10, 10));
   root->SetContentBounds(gfx::Size(10, 10));
   root->SetDrawsContent(true);
   host_impl_->active_tree()->SetRootLayer(root.Pass());
   EXPECT_FALSE(reshape_tracker->reshape_called());
+  reshape_tracker->clear_reshape_called();
 
   LayerTreeHostImpl::FrameData frame;
+  host_impl_->SetViewportSize(gfx::Size(10, 10));
+  host_impl_->SetDeviceScaleFactor(1.f);
   EXPECT_TRUE(host_impl_->PrepareToDraw(&frame, gfx::Rect()));
   host_impl_->DrawLayers(&frame, base::TimeTicks::Now());
   EXPECT_TRUE(reshape_tracker->reshape_called());
+  EXPECT_EQ(reshape_tracker->last_reshape_width(), 10);
+  EXPECT_EQ(reshape_tracker->last_reshape_height(), 10);
+  EXPECT_EQ(reshape_tracker->last_reshape_scale_factor(), 1.f);
   host_impl_->DidDrawAllLayers(frame);
+  reshape_tracker->clear_reshape_called();
+
+  host_impl_->SetViewportSize(gfx::Size(20, 30));
+  EXPECT_TRUE(host_impl_->PrepareToDraw(&frame, gfx::Rect()));
+  host_impl_->DrawLayers(&frame, base::TimeTicks::Now());
+  EXPECT_TRUE(reshape_tracker->reshape_called());
+  EXPECT_EQ(reshape_tracker->last_reshape_width(), 20);
+  EXPECT_EQ(reshape_tracker->last_reshape_height(), 30);
+  EXPECT_EQ(reshape_tracker->last_reshape_scale_factor(), 1.f);
+  host_impl_->DidDrawAllLayers(frame);
+  reshape_tracker->clear_reshape_called();
+
+  host_impl_->SetDeviceScaleFactor(2.f);
+  EXPECT_TRUE(host_impl_->PrepareToDraw(&frame, gfx::Rect()));
+  host_impl_->DrawLayers(&frame, base::TimeTicks::Now());
+  EXPECT_TRUE(reshape_tracker->reshape_called());
+  EXPECT_EQ(reshape_tracker->last_reshape_width(), 20);
+  EXPECT_EQ(reshape_tracker->last_reshape_height(), 30);
+  EXPECT_EQ(reshape_tracker->last_reshape_scale_factor(), 2.f);
+  host_impl_->DidDrawAllLayers(frame);
+  reshape_tracker->clear_reshape_called();
 }
 
 class PartialSwapTrackerContext : public TestWebGraphicsContext3D {
  public:
   virtual void postSubBufferCHROMIUM(int x, int y, int width, int height)
       OVERRIDE {
     partial_swap_rect_ = gfx::Rect(x, y, width, height);
   }
 
   virtual WebKit::WebString getString(WebKit::WGC3Denum name) OVERRIDE {
@@ skipping 1777 matching lines @@
 
   virtual bool HaveCachedResourcesForRenderPassId(RenderPass::Id id) const
       OVERRIDE {
     return textures_.count(id);
   }
 
   // RendererClient implementation.
   virtual gfx::Size DeviceViewportSize() const OVERRIDE {
     return viewport_size_;
   }
+  virtual float DeviceScaleFactor() const OVERRIDE {
+    return 1.f;
+  }
   virtual const LayerTreeSettings& Settings() const OVERRIDE {
     return settings_;
   }
   virtual void SetFullRootLayerDamage() OVERRIDE {}
   virtual void SetManagedMemoryPolicy(const ManagedMemoryPolicy& policy)
       OVERRIDE {}
   virtual void EnforceManagedMemoryPolicy(const ManagedMemoryPolicy& policy)
       OVERRIDE {}
   virtual bool HasImplThread() const OVERRIDE { return false; }
   virtual bool ShouldClearRootRenderPass() const OVERRIDE { return true; }
@@ skipping 1175 matching lines @@
   EXPECT_EQ(0, software_device->frames_ended_);
 
   DrawFrame();
 
   EXPECT_EQ(1, software_device->frames_began_);
   EXPECT_EQ(1, software_device->frames_ended_);
 }
 
 }  // namespace
 }  // namespace cc