cc: RenderSurfaceImpl tile mask layer.

cc/layers/render_surface_impl.cc

Index: cc/layers/render_surface_impl.cc
diff --git a/cc/layers/render_surface_impl.cc b/cc/layers/render_surface_impl.cc
index 1e20a4dada9921287713aea12bc92272842479f5..4a37f72ea6ca1f287094e617d248eb362e527688 100644
--- a/cc/layers/render_surface_impl.cc
+++ b/cc/layers/render_surface_impl.cc
@@ -13,11 +13,14 @@
 #include "cc/base/filter_operations.h"
 #include "cc/base/math_util.h"
 #include "cc/debug/debug_colors.h"
+#include "cc/layers/append_quads_data.h"
 #include "cc/layers/layer_impl.h"
+#include "cc/quads/content_draw_quad_base.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/render_pass.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/shared_quad_state.h"
+#include "cc/quads/solid_color_draw_quad.h"
 #include "cc/trees/damage_tracker.h"
 #include "cc/trees/draw_property_utils.h"
 #include "cc/trees/effect_node.h"
@@ -396,10 +399,10 @@ void RenderSurfaceImpl::AppendQuads(RenderPass* render_pass,
 
   ResourceId mask_resource_id = 0;
   gfx::Size mask_texture_size;
-  gfx::Vector2dF mask_uv_scale;
+  gfx::RectF mask_uv_rect;
   gfx::Vector2dF surface_contents_scale =
       OwningEffectNode()->surface_contents_scale;
-  LayerImpl* mask_layer = MaskLayer();
+  PictureLayerImpl* mask_layer = static_cast<PictureLayerImpl*>(MaskLayer());
   if (mask_layer && mask_layer->DrawsContent() &&
       !mask_layer->bounds().IsEmpty()) {
     // The software renderer applies mask layer and blending in the wrong
@@ -408,21 +411,139 @@ void RenderSurfaceImpl::AppendQuads(RenderPass* render_pass,
     // mask layers.
     DCHECK(BlendMode() != SkBlendMode::kDstIn)
         << "kDstIn blend mode with mask layer is unsupported.";
+    if (mask_layer->mask_type() == Layer::LayerMaskType::MULTI_TEXTURE_MASK) {
+      TileMaskLayer(render_pass, shared_quad_state, visible_layer_rect);
+      return;
+    }
     mask_layer->GetContentsResourceId(&mask_resource_id, &mask_texture_size);
     gfx::SizeF unclipped_mask_target_size = gfx::ScaleSize(
         gfx::SizeF(OwningEffectNode()->unscaled_mask_target_size),
         surface_contents_scale.x(), surface_contents_scale.y());
-    mask_uv_scale = gfx::Vector2dF(1.0f / unclipped_mask_target_size.width(),
-                                   1.0f / unclipped_mask_target_size.height());
+    // Convert content_rect from target space to normalized space.
+    // Where unclipped_mask_target_size maps to gfx::Size(1, 1).
+    mask_uv_rect = gfx::ScaleRect(gfx::RectF(content_rect()),
+                                  1.0f / unclipped_mask_target_size.width(),
+                                  1.0f / unclipped_mask_target_size.height());
   }
 
+  gfx::RectF tex_coord_rect(gfx::Rect(content_rect().size()));
   RenderPassDrawQuad* quad =
       render_pass->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
-  quad->SetNew(
-      shared_quad_state, content_rect(), visible_layer_rect, GetRenderPassId(),
-      mask_resource_id, gfx::ScaleRect(gfx::RectF(content_rect()),
-                                       mask_uv_scale.x(), mask_uv_scale.y()),
-      mask_texture_size, surface_contents_scale, FiltersOrigin(), gfx::RectF());
+  quad->SetNew(shared_quad_state, content_rect(), visible_layer_rect,
+               GetRenderPassId(), mask_resource_id, mask_uv_rect,
+               mask_texture_size, surface_contents_scale, FiltersOrigin(),
+               tex_coord_rect);
+}
+
+void RenderSurfaceImpl::TileMaskLayer(RenderPass* render_pass,
+                                      SharedQuadState* shared_quad_state,
+                                      const gfx::Rect& visible_layer_rect) {
+  DCHECK(MaskLayer());
+  DCHECK(Filters().IsEmpty());
+
+  LayerImpl* mask_layer = MaskLayer();
+  gfx::Vector2dF owning_layer_to_surface_contents_scale =
+      OwningEffectNode()->surface_contents_scale;
+  std::unique_ptr<RenderPass> temp_render_pass = RenderPass::Create();
+  AppendQuadsData temp_append_quads_data;
+  mask_layer->AppendQuads(temp_render_pass.get(), &temp_append_quads_data);
+
+  auto* temp_quad = temp_render_pass->quad_list.front();
+  if (!temp_quad)
+    return;
+  gfx::Transform mask_quad_to_surface_contents =
+      temp_quad->shared_quad_state->quad_to_target_transform;
+  // Draw transform of a mask layer should be a 2d scale.
+  DCHECK(mask_quad_to_surface_contents.IsScale2d());
+  gfx::Vector2dF mask_quad_to_surface_contents_scale =
+      mask_quad_to_surface_contents.Scale2d();
+  shared_quad_state->quad_to_target_transform.matrix().preScale(
+      mask_quad_to_surface_contents_scale.x(),
+      mask_quad_to_surface_contents_scale.y(), 1.f);
+  shared_quad_state->quad_layer_bounds =
+      gfx::ScaleToCeiledSize(shared_quad_state->quad_layer_bounds,
+                             1.f / mask_quad_to_surface_contents_scale.x(),
+                             1.f / mask_quad_to_surface_contents_scale.y());
+  shared_quad_state->visible_quad_layer_rect =
+      gfx::ScaleToEnclosedRect(shared_quad_state->visible_quad_layer_rect,
+                               mask_quad_to_surface_contents_scale.x(),
+                               mask_quad_to_surface_contents_scale.y());
+  gfx::Rect content_rect_in_coverage_space = gfx::ScaleToEnclosedRect(
+      content_rect(), 1.f / mask_quad_to_surface_contents_scale.x(),
+      1.f / mask_quad_to_surface_contents_scale.y());
+  gfx::Rect visible_layer_rect_in_coverage_space = gfx::ScaleToEnclosedRect(
+      visible_layer_rect, 1.f / mask_quad_to_surface_contents_scale.x(),
+      1.f / mask_quad_to_surface_contents_scale.y());
+
+  for (auto* temp_quad : temp_render_pass->quad_list) {
+    gfx::Rect quad_rect = temp_quad->rect;
+    gfx::Rect render_quad_rect = quad_rect;
+    if (!quad_rect.Intersects(content_rect_in_coverage_space))
+      continue;
+    render_quad_rect =
+        gfx::IntersectRects(quad_rect, content_rect_in_coverage_space);
+    gfx::RectF quad_rect_in_surface_contents_space = gfx::ScaleRect(
+        gfx::RectF(render_quad_rect), mask_quad_to_surface_contents_scale.x(),
+        mask_quad_to_surface_contents_scale.y());
+    gfx::RectF quad_rect_in_non_normalized_texture_space =
+        quad_rect_in_surface_contents_space;
+    quad_rect_in_non_normalized_texture_space.Offset(
+        -content_rect().OffsetFromOrigin());
+
+    switch (temp_quad->material) {
+      case DrawQuad::TILED_CONTENT: {
+        DCHECK_EQ(1U, temp_quad->resources.count);
+        RenderPassDrawQuad* quad =
+            render_pass->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
+
+        gfx::Size mask_texture_size =
+            static_cast<ContentDrawQuadBase*>(temp_quad)->texture_size;
+        gfx::RectF temp_tex_coord_rect =
+            static_cast<ContentDrawQuadBase*>(temp_quad)->tex_coord_rect;
+        gfx::Transform coverage_to_non_normalized_mask =
+            gfx::Transform(SkMatrix44(SkMatrix::MakeRectToRect(
+                RectToSkRect(quad_rect), RectFToSkRect(temp_tex_coord_rect),
+                SkMatrix::kFill_ScaleToFit)));
+        gfx::Transform coverage_to_normalized_mask =
+            coverage_to_non_normalized_mask;
+        coverage_to_normalized_mask.matrix().postScale(
+            1.f / mask_texture_size.width(), 1.f / mask_texture_size.height(),
+            1.f);
+        gfx::RectF mask_uv_rect = gfx::RectF(render_quad_rect);
+        coverage_to_normalized_mask.TransformRect(&mask_uv_rect);
+
+        quad->SetNew(shared_quad_state, render_quad_rect,
+                     gfx::IntersectRects(temp_quad->visible_rect,
+                                         visible_layer_rect_in_coverage_space),
+                     GetRenderPassId(), temp_quad->resources.ids[0],
+                     mask_uv_rect, mask_texture_size,
+                     owning_layer_to_surface_contents_scale, FiltersOrigin(),
+                     quad_rect_in_non_normalized_texture_space);
+      } break;
+      case DrawQuad::SOLID_COLOR: {
+        if (!static_cast<SolidColorDrawQuad*>(temp_quad)->color)
+          continue;
+        SkAlpha solid = SK_AlphaOPAQUE;
+        DCHECK_EQ(
+            SkColorGetA(static_cast<SolidColorDrawQuad*>(temp_quad)->color),
+            solid);
+        RenderPassDrawQuad* quad =
+            render_pass->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
+        quad->SetNew(shared_quad_state, render_quad_rect,
+                     gfx::IntersectRects(temp_quad->visible_rect,
+                                         visible_layer_rect_in_coverage_space),
+                     GetRenderPassId(), 0, gfx::RectF(), gfx::Size(),
+                     owning_layer_to_surface_contents_scale, FiltersOrigin(),
+                     quad_rect_in_non_normalized_texture_space);
+      } break;
+      case DrawQuad::DEBUG_BORDER:
+        NOTIMPLEMENTED();
+        break;
+      default:
+        NOTREACHED();
+        break;
+    }
+  }
 }
 
 }  // namespace cc