cc: Change the restrictions on overlays for video

- Allow positively scaled transformations. Overlay hardware can handle this
- Allow the STREAM_VIDEO_QUAD type. Tests added for that type

TEST=manual test, video in overlay

Review URL: https://codereview.chromium.org/855403002

Cr-Commit-Position: refs/heads/master@{#314387}

5 files changed, 360 insertions, 31 deletions

diff --git a/cc/output/overlay_candidate.cc b/cc/output/overlay_candidate.cc
index 4168253..46c3a7d 100644
--- a/cc/output/overlay_candidate.cc
+++ b/cc/output/overlay_candidate.cc
@@ -24,7 +24,7 @@ OverlayCandidate::~OverlayCandidate() {}
 gfx::OverlayTransform OverlayCandidate::GetOverlayTransform(
     const gfx::Transform& quad_transform,
     bool flipped) {
-  if (!quad_transform.IsIdentityOrTranslation())
+  if (!quad_transform.IsPositiveScaleOrTranslation())
     return gfx::OVERLAY_TRANSFORM_INVALID;
 
   return flipped ? gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL
@@ -32,9 +32,105 @@ gfx::OverlayTransform OverlayCandidate::GetOverlayTransform(
 }
 
 // static
+gfx::OverlayTransform OverlayCandidate::ModifyTransform(
+    gfx::OverlayTransform in,
+    gfx::OverlayTransform delta) {
+  // There are 8 different possible transforms. We can characterize these
+  // by looking at where the origin moves and the direction the horizontal goes.
+  // (TL=top-left, BR=bottom-right, H=horizontal, V=vertical).
+  // NONE: TL, H
+  // FLIP_VERTICAL: BL, H
+  // FLIP_HORIZONTAL: TR, H
+  // ROTATE_90: TR, V
+  // ROTATE_180: BR, H
+  // ROTATE_270: BL, V
+  // Missing transforms: TL, V & BR, V
+  // Basic combinations:
+  // Flip X & Y -> Rotate 180 (TL,H -> TR,H -> BR,H or TL,H -> BL,H -> BR,H)
+  // Flip X or Y + Rotate 180 -> other flip (eg, TL,H -> TR,H -> BL,H)
+  // Rotate + Rotate simply adds values.
+  // Rotate 90/270 + flip is invalid because we can only have verticals with
+  // the origin in TR or BL.
+  if (delta == gfx::OVERLAY_TRANSFORM_NONE)
+    return in;
+  switch (in) {
+    case gfx::OVERLAY_TRANSFORM_NONE:
+      return delta;
+    case gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL:
+      switch (delta) {
+        case gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL:
+          return gfx::OVERLAY_TRANSFORM_NONE;
+        case gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_180;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_180:
+          return gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL;
+        default:
+          return gfx::OVERLAY_TRANSFORM_INVALID;
+      }
+      break;
+    case gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL:
+      switch (delta) {
+        case gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL:
+          return gfx::OVERLAY_TRANSFORM_NONE;
+        case gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_180;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_90:
+        case gfx::OVERLAY_TRANSFORM_ROTATE_180:
+          return gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_270:
+        default:
+          return gfx::OVERLAY_TRANSFORM_INVALID;
+      }
+      break;
+    case gfx::OVERLAY_TRANSFORM_ROTATE_90:
+      switch (delta) {
+        case gfx::OVERLAY_TRANSFORM_ROTATE_90:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_180;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_180:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_270;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_270:
+          return gfx::OVERLAY_TRANSFORM_NONE;
+        default:
+          return gfx::OVERLAY_TRANSFORM_INVALID;
+      }
+      break;
+    case gfx::OVERLAY_TRANSFORM_ROTATE_180:
+      switch (delta) {
+        case gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL:
+          return gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL;
+        case gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL:
+          return gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_90:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_270;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_180:
+          return gfx::OVERLAY_TRANSFORM_NONE;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_270:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_90;
+        default:
+          return gfx::OVERLAY_TRANSFORM_INVALID;
+      }
+      break;
+    case gfx::OVERLAY_TRANSFORM_ROTATE_270:
+      switch (delta) {
+        case gfx::OVERLAY_TRANSFORM_ROTATE_90:
+          return gfx::OVERLAY_TRANSFORM_NONE;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_180:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_90;
+        case gfx::OVERLAY_TRANSFORM_ROTATE_270:
+          return gfx::OVERLAY_TRANSFORM_ROTATE_180;
+        default:
+          return gfx::OVERLAY_TRANSFORM_INVALID;
+      }
+      break;
+    default:
+      return gfx::OVERLAY_TRANSFORM_INVALID;
+  }
+}
+
+// static
 gfx::Rect OverlayCandidate::GetOverlayRect(const gfx::Transform& quad_transform,
                                            const gfx::Rect& rect) {
-  DCHECK(quad_transform.IsIdentityOrTranslation());
+  DCHECK(quad_transform.IsPositiveScaleOrTranslation());
 
   gfx::RectF float_rect(rect);
   quad_transform.TransformRect(&float_rect);
diff --git a/cc/output/overlay_candidate.h b/cc/output/overlay_candidate.h
index 9a1e534..28ae8cb 100644
--- a/cc/output/overlay_candidate.h
+++ b/cc/output/overlay_candidate.h
@@ -20,6 +20,10 @@ class CC_EXPORT OverlayCandidate {
   static gfx::OverlayTransform GetOverlayTransform(
       const gfx::Transform& quad_transform,
       bool flipped);
+  // Apply transform |delta| to |in| and return the resulting transform,
+  // or OVERLAY_TRANSFORM_INVALID.
+  static gfx::OverlayTransform ModifyTransform(gfx::OverlayTransform in,
+                                               gfx::OverlayTransform delta);
   static gfx::Rect GetOverlayRect(const gfx::Transform& quad_transform,
                                   const gfx::Rect& rect);
 
diff --git a/cc/output/overlay_strategy_single_on_top.cc b/cc/output/overlay_strategy_single_on_top.cc
index 98d77ad..9a95206 100644
--- a/cc/output/overlay_strategy_single_on_top.cc
+++ b/cc/output/overlay_strategy_single_on_top.cc
@@ -4,8 +4,13 @@
 
 #include "cc/output/overlay_strategy_single_on_top.h"
 
+#include <limits>
+
 #include "cc/quads/draw_quad.h"
+#include "cc/quads/solid_color_draw_quad.h"
+#include "cc/quads/stream_video_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
+#include "ui/gfx/geometry/point3_f.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/transform.h"
 
@@ -17,6 +22,103 @@ OverlayStrategySingleOnTop::OverlayStrategySingleOnTop(
     : capability_checker_(capability_checker),
       resource_provider_(resource_provider) {}
 
+bool OverlayStrategySingleOnTop::IsOverlayQuad(const DrawQuad* draw_quad) {
+  unsigned int resource_id;
+  switch (draw_quad->material) {
+    case DrawQuad::TEXTURE_CONTENT:
+      resource_id = TextureDrawQuad::MaterialCast(draw_quad)->resource_id;
+      break;
+    case DrawQuad::STREAM_VIDEO_CONTENT:
+      resource_id = StreamVideoDrawQuad::MaterialCast(draw_quad)->resource_id;
+      break;
+    default:
+      return false;
+  }
+  return resource_provider_->AllowOverlay(resource_id);
+}
+
+bool OverlayStrategySingleOnTop::GetTextureQuadInfo(
+    const TextureDrawQuad& quad,
+    OverlayCandidate* quad_info) {
+  gfx::OverlayTransform overlay_transform =
+      OverlayCandidate::GetOverlayTransform(quad.quadTransform(), quad.flipped);
+  if (quad.background_color != SK_ColorTRANSPARENT ||
+      quad.premultiplied_alpha ||
+      overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID)
+    return false;
+  quad_info->resource_id = quad.resource_id;
+  quad_info->transform = overlay_transform;
+  quad_info->uv_rect = BoundingRect(quad.uv_top_left, quad.uv_bottom_right);
+  return true;
+}
+
+bool OverlayStrategySingleOnTop::GetVideoQuadInfo(
+    const StreamVideoDrawQuad& quad,
+    OverlayCandidate* quad_info) {
+  gfx::OverlayTransform overlay_transform =
+      OverlayCandidate::GetOverlayTransform(quad.quadTransform(), false);
+  if (overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID)
+    return false;
+  if (!quad.matrix.IsScaleOrTranslation()) {
+    // We cannot handle anything other than scaling & translation for texture
+    // coordinates yet.
+    return false;
+  }
+  quad_info->resource_id = quad.resource_id;
+  quad_info->transform = overlay_transform;
+
+  gfx::Point3F uv0 = gfx::Point3F(0, 0, 0);
+  gfx::Point3F uv1 = gfx::Point3F(1, 1, 0);
+  quad.matrix.TransformPoint(&uv0);
+  quad.matrix.TransformPoint(&uv1);
+  gfx::Vector3dF delta = uv1 - uv0;
+  if (delta.x() < 0) {
+    quad_info->transform = OverlayCandidate::ModifyTransform(
+        quad_info->transform, gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL);
+    float x0 = uv0.x();
+    uv0.set_x(uv1.x());
+    uv1.set_x(x0);
+    delta.set_x(-delta.x());
+  }
+
+  if (delta.y() < 0) {
+    // In this situation, uv0y < uv1y. Since we overlay inverted, a request
+    // to invert the source texture means we can just output the texture
+    // normally and it will be correct.
+    quad_info->uv_rect = gfx::RectF(uv0.x(), uv1.y(), delta.x(), -delta.y());
+  } else {
+    quad_info->transform = OverlayCandidate::ModifyTransform(
+        quad_info->transform, gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL);
+    quad_info->uv_rect = gfx::RectF(uv0.x(), uv0.y(), delta.x(), delta.y());
+  }
+  return true;
+}
+
+bool OverlayStrategySingleOnTop::GetCandidateQuadInfo(
+    const DrawQuad& draw_quad,
+    OverlayCandidate* quad_info) {
+  // All quad checks.
+  if (draw_quad.needs_blending || draw_quad.shared_quad_state->opacity != 1.f ||
+      draw_quad.shared_quad_state->blend_mode != SkXfermode::kSrcOver_Mode)
+    return false;
+
+  if (draw_quad.material == DrawQuad::TEXTURE_CONTENT) {
+    const TextureDrawQuad& quad = *TextureDrawQuad::MaterialCast(&draw_quad);
+    if (!GetTextureQuadInfo(quad, quad_info))
+      return false;
+  } else if (draw_quad.material == DrawQuad::STREAM_VIDEO_CONTENT) {
+    const StreamVideoDrawQuad& quad =
+        *StreamVideoDrawQuad::MaterialCast(&draw_quad);
+    if (!GetVideoQuadInfo(quad, quad_info))
+      return false;
+  }
+
+  quad_info->format = RGBA_8888;
+  quad_info->display_rect = OverlayCandidate::GetOverlayRect(
+      draw_quad.quadTransform(), draw_quad.rect);
+  return true;
+}
+
 bool OverlayStrategySingleOnTop::Attempt(
     RenderPassList* render_passes_in_draw_order,
     OverlayCandidateList* candidate_list) {
@@ -27,15 +129,12 @@ bool OverlayStrategySingleOnTop::Attempt(
   RenderPass* root_render_pass = render_passes_in_draw_order->back();
   DCHECK(root_render_pass);
 
+  OverlayCandidate candidate;
   QuadList& quad_list = root_render_pass->quad_list;
   auto candidate_iterator = quad_list.end();
   for (auto it = quad_list.begin(); it != quad_list.end(); ++it) {
     const DrawQuad* draw_quad = *it;
-    if (draw_quad->material == DrawQuad::TEXTURE_CONTENT) {
-      const TextureDrawQuad& quad = *TextureDrawQuad::MaterialCast(draw_quad);
-      if (!resource_provider_->AllowOverlay(quad.resource_id)) {
-        continue;
-      }
+    if (IsOverlayQuad(draw_quad)) {
       // Check that no prior quads overlap it.
       bool intersects = false;
       gfx::RectF rect = draw_quad->rect;
@@ -49,7 +148,7 @@ bool OverlayStrategySingleOnTop::Attempt(
           break;
         }
       }
-      if (intersects)
+      if (intersects || !GetCandidateQuadInfo(*draw_quad, &candidate))
         continue;
       candidate_iterator = it;
       break;
@@ -57,34 +156,14 @@ bool OverlayStrategySingleOnTop::Attempt(
   }
   if (candidate_iterator == quad_list.end())
     return false;
-  const TextureDrawQuad& quad =
-      *TextureDrawQuad::MaterialCast(*candidate_iterator);
-
-  // Simple quads only.
-  gfx::OverlayTransform overlay_transform =
-      OverlayCandidate::GetOverlayTransform(quad.quadTransform(), quad.flipped);
-  if (overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID ||
-      !quad.quadTransform().IsIdentityOrTranslation() || quad.needs_blending ||
-      quad.shared_quad_state->opacity != 1.f ||
-      quad.shared_quad_state->blend_mode != SkXfermode::kSrcOver_Mode ||
-      quad.premultiplied_alpha || quad.background_color != SK_ColorTRANSPARENT)
-    return false;
 
   // Add our primary surface.
   OverlayCandidateList candidates;
   OverlayCandidate main_image;
   main_image.display_rect = root_render_pass->output_rect;
-  main_image.format = RGBA_8888;
   candidates.push_back(main_image);
 
   // Add the overlay.
-  OverlayCandidate candidate;
-  candidate.transform = overlay_transform;
-  candidate.display_rect =
-      OverlayCandidate::GetOverlayRect(quad.quadTransform(), quad.rect);
-  candidate.uv_rect = BoundingRect(quad.uv_top_left, quad.uv_bottom_right);
-  candidate.format = RGBA_8888;
-  candidate.resource_id = quad.resource_id;
   candidate.plane_z_order = 1;
   candidates.push_back(candidate);
 
diff --git a/cc/output/overlay_strategy_single_on_top.h b/cc/output/overlay_strategy_single_on_top.h
index e5518cc..f92e104 100644
--- a/cc/output/overlay_strategy_single_on_top.h
+++ b/cc/output/overlay_strategy_single_on_top.h
@@ -14,6 +14,8 @@
 
 namespace cc {
 class OverlayCandidateValidator;
+class StreamVideoDrawQuad;
+class TextureDrawQuad;
 
 class CC_EXPORT OverlayStrategySingleOnTop : public OverlayProcessor::Strategy {
  public:
@@ -23,6 +25,15 @@ class CC_EXPORT OverlayStrategySingleOnTop : public OverlayProcessor::Strategy {
                OverlayCandidateList* candidate_list) override;
 
  private:
+  bool IsOverlayQuad(const DrawQuad* draw_quad);
+  bool GetCandidateQuadInfo(const DrawQuad& draw_quad,
+                            OverlayCandidate* quad_info);
+
+  bool GetTextureQuadInfo(const TextureDrawQuad& quad,
+                          OverlayCandidate* quad_info);
+  bool GetVideoQuadInfo(const StreamVideoDrawQuad& quad,
+                        OverlayCandidate* quad_info);
+
   OverlayCandidateValidator* capability_checker_;
   ResourceProvider* resource_provider_;
   DISALLOW_COPY_AND_ASSIGN(OverlayStrategySingleOnTop);
diff --git a/cc/output/overlay_unittest.cc b/cc/output/overlay_unittest.cc
index 8fa35cb..4682679 100644
--- a/cc/output/overlay_unittest.cc
+++ b/cc/output/overlay_unittest.cc
@@ -11,6 +11,7 @@
 #include "cc/output/overlay_strategy_single_on_top.h"
 #include "cc/quads/checkerboard_draw_quad.h"
 #include "cc/quads/render_pass.h"
+#include "cc/quads/stream_video_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/resources/resource_provider.h"
 #include "cc/resources/texture_mailbox.h"
@@ -32,6 +33,16 @@ const gfx::Rect kOverlayTopLeftRect(0, 0, 64, 64);
 const gfx::Rect kOverlayBottomRightRect(64, 64, 64, 64);
 const gfx::PointF kUVTopLeft(0.1f, 0.2f);
 const gfx::PointF kUVBottomRight(1.0f, 1.0f);
+const gfx::Transform kNormalTransform =
+    gfx::Transform(0.9f, 0, 0, 0.8f, 0.1f, 0.2f);  // x,y -> x,y.
+const gfx::Transform kXMirrorTransform =
+    gfx::Transform(-0.9f, 0, 0, 0.8f, 1.0f, 0.2f);  // x,y -> 1-x,y.
+const gfx::Transform kYMirrorTransform =
+    gfx::Transform(0.9f, 0, 0, -0.8f, 0.1f, 1.0f);  // x,y -> x,1-y.
+const gfx::Transform kBothMirrorTransform =
+    gfx::Transform(-0.9f, 0, 0, -0.8f, 1.0f, 1.0f);  // x,y -> 1-x,1-y.
+const gfx::Transform kSwapTransform =
+    gfx::Transform(0, 1, 1, 0, 0, 0);  // x,y -> y,x.
 
 void MailboxReleased(unsigned sync_point,
                      bool lost_resource,
@@ -173,6 +184,22 @@ TextureDrawQuad* CreateCandidateQuadAt(ResourceProvider* resource_provider,
   return overlay_quad;
 }
 
+StreamVideoDrawQuad* CreateCandidateVideoQuadAt(
+    ResourceProvider* resource_provider,
+    const SharedQuadState* shared_quad_state,
+    RenderPass* render_pass,
+    const gfx::Rect& rect,
+    const gfx::Transform& transform) {
+  ResourceProvider::ResourceId resource_id = CreateResource(resource_provider);
+
+  StreamVideoDrawQuad* overlay_quad =
+      render_pass->CreateAndAppendDrawQuad<StreamVideoDrawQuad>();
+  overlay_quad->SetNew(shared_quad_state, rect, rect, rect, resource_id,
+                       transform);
+
+  return overlay_quad;
+}
+
 TextureDrawQuad* CreateFullscreenCandidateQuad(
     ResourceProvider* resource_provider,
     const SharedQuadState* shared_quad_state,
@@ -181,6 +208,15 @@ TextureDrawQuad* CreateFullscreenCandidateQuad(
       resource_provider, shared_quad_state, render_pass, kOverlayRect);
 }
 
+StreamVideoDrawQuad* CreateFullscreenCandidateVideoQuad(
+    ResourceProvider* resource_provider,
+    const SharedQuadState* shared_quad_state,
+    RenderPass* render_pass,
+    const gfx::Transform& transform) {
+  return CreateCandidateVideoQuadAt(resource_provider, shared_quad_state,
+                                    render_pass, kOverlayRect, transform);
+}
+
 void CreateCheckeredQuadAt(ResourceProvider* resource_provider,
                            const SharedQuadState* shared_quad_state,
                            RenderPass* render_pass,
@@ -484,13 +520,13 @@ TEST_F(SingleOverlayOnTopTest, RejectOpacity) {
   EXPECT_EQ(0U, candidate_list.size());
 }
 
-TEST_F(SingleOverlayOnTopTest, RejectTransform) {
+TEST_F(SingleOverlayOnTopTest, RejectNonScaleTransform) {
   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.Scale(2.f,
-                                                                         2.f);
+  pass->shared_quad_state_list.back()
+      ->content_to_target_transform.RotateAboutXAxis(45.f);
 
   RenderPassList pass_list;
   pass_list.push_back(pass.Pass());
@@ -500,6 +536,39 @@ TEST_F(SingleOverlayOnTopTest, RejectTransform) {
   EXPECT_EQ(0U, candidate_list.size());
 }
 
+TEST_F(SingleOverlayOnTopTest, RejectNegativeScaleTransform) {
+  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.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());
+}
+
+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, AllowNotTopIfNotOccluded) {
   scoped_ptr<RenderPass> pass = CreateRenderPass();
   CreateCheckeredQuadAt(resource_provider_.get(),
@@ -523,6 +592,76 @@ TEST_F(SingleOverlayOnTopTest, AllowNotTopIfNotOccluded) {
   EXPECT_EQ(2U, candidate_list.size());
 }
 
+TEST_F(SingleOverlayOnTopTest, RejectVideoSwapTransform) {
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateFullscreenCandidateVideoQuad(resource_provider_.get(),
+                                     pass->shared_quad_state_list.back(),
+                                     pass.get(), kSwapTransform);
+
+  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, AllowVideoXMirrorTransform) {
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateFullscreenCandidateVideoQuad(resource_provider_.get(),
+                                     pass->shared_quad_state_list.back(),
+                                     pass.get(), kXMirrorTransform);
+
+  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, AllowVideoBothMirrorTransform) {
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateFullscreenCandidateVideoQuad(resource_provider_.get(),
+                                     pass->shared_quad_state_list.back(),
+                                     pass.get(), kBothMirrorTransform);
+
+  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, AllowVideoNormalTransform) {
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateFullscreenCandidateVideoQuad(resource_provider_.get(),
+                                     pass->shared_quad_state_list.back(),
+                                     pass.get(), kNormalTransform);
+
+  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, AllowVideoYMirrorTransform) {
+  scoped_ptr<RenderPass> pass = CreateRenderPass();
+  CreateFullscreenCandidateVideoQuad(resource_provider_.get(),
+                                     pass->shared_quad_state_list.back(),
+                                     pass.get(), kYMirrorTransform);
+
+  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());
+}
+
 class OverlayInfoRendererGL : public GLRenderer {
  public:
   OverlayInfoRendererGL(RendererClient* client,