src/cc/trees/quad_culler.cc

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/trees/quad_culler.h"
   6
   7 #include "cc/debug/debug_colors.h"
   8 #include "cc/debug/overdraw_metrics.h"
   9 #include "cc/layers/append_quads_data.h"
  10 #include "cc/layers/layer_impl.h"
  11 #include "cc/quads/debug_border_draw_quad.h"
  12 #include "cc/quads/render_pass.h"
  13 #include "cc/trees/occlusion_tracker.h"
  14 #include "third_party/skia/include/core/SkColor.h"
  15 #include "ui/gfx/transform.h"
  16
  17 namespace cc {
  18
  19 QuadCuller::QuadCuller(QuadList* quad_list,
  20                        SharedQuadStateList* shared_quad_state_list,
  21                        const LayerImpl* layer,
  22                        const OcclusionTrackerImpl& occlusion_tracker,
  23                        bool show_culling_with_debug_border_quads,
  24                        bool for_surface)
  25     : quad_list_(quad_list),
  26       shared_quad_state_list_(shared_quad_state_list),
  27       layer_(layer),
  28       occlusion_tracker_(occlusion_tracker),
  29       current_shared_quad_state_(NULL),
  30       show_culling_with_debug_border_quads_(
  31           show_culling_with_debug_border_quads),
  32       for_surface_(for_surface) {}
  33
  34 SharedQuadState* QuadCuller::UseSharedQuadState(
  35     scoped_ptr<SharedQuadState> shared_quad_state) {
  36   // TODO(danakj): If all quads are culled for the shared_quad_state, we can
  37   // drop it from the list.
  38   current_shared_quad_state_ = shared_quad_state.get();
  39   shared_quad_state_list_->push_back(shared_quad_state.Pass());
  40   return current_shared_quad_state_;
  41 }
  42
  43 static inline bool AppendQuadInternal(
  44     scoped_ptr<DrawQuad> draw_quad,
  45     gfx::Rect culled_rect,
  46     QuadList* quad_list,
  47     const OcclusionTrackerImpl& occlusion_tracker,
  48     const LayerImpl* layer,
  49     bool create_debug_border_quads) {
  50   bool keep_quad = !culled_rect.IsEmpty();
  51   if (keep_quad)
  52     draw_quad->visible_rect = culled_rect;
  53
  54   occlusion_tracker.overdraw_metrics()->DidCullForDrawing(
  55       draw_quad->quadTransform(), draw_quad->rect, culled_rect);
  56   gfx::Rect opaque_draw_rect =
  57       draw_quad->opacity() == 1.0f ? draw_quad->opaque_rect : gfx::Rect();
  58   occlusion_tracker.overdraw_metrics()->
  59       DidDraw(draw_quad->quadTransform(), culled_rect, opaque_draw_rect);
  60
  61   if (keep_quad) {
  62     if (create_debug_border_quads && !draw_quad->IsDebugQuad() &&
  63         draw_quad->visible_rect != draw_quad->rect) {
  64       SkColor color = DebugColors::CulledTileBorderColor();
  65       float width = DebugColors::CulledTileBorderWidth(
  66           layer ? layer->layer_tree_impl() : NULL);
  67       scoped_ptr<DebugBorderDrawQuad> debug_border_quad =
  68           DebugBorderDrawQuad::Create();
  69       debug_border_quad->SetNew(
  70           draw_quad->shared_quad_state, draw_quad->visible_rect, color, width);
  71       quad_list->push_back(debug_border_quad.PassAs<DrawQuad>());
  72     }
  73
  74     // Pass the quad after we're done using it.
  75     quad_list->push_back(draw_quad.Pass());
  76   }
  77   return keep_quad;
  78 }
  79
  80 bool QuadCuller::Append(scoped_ptr<DrawQuad> draw_quad,
  81                         AppendQuadsData* append_quads_data) {
  82   DCHECK(draw_quad->shared_quad_state == current_shared_quad_state_);
  83   DCHECK(!shared_quad_state_list_->empty());
  84   DCHECK(shared_quad_state_list_->back() == current_shared_quad_state_);
  85
  86   gfx::Rect culled_rect;
  87   bool impl_draw_transform_is_unknown = false;
  88
  89   if (for_surface_) {
  90     culled_rect = occlusion_tracker_.UnoccludedContributingSurfaceContentRect(
  91         layer_, false, draw_quad->visible_rect);
  92   } else {
  93     culled_rect = occlusion_tracker_.UnoccludedContentRect(
  94         layer_->render_target(),
  95         draw_quad->visible_rect,
  96         draw_quad->quadTransform(),
  97         impl_draw_transform_is_unknown);
  98   }
  99
 100   return AppendQuadInternal(draw_quad.Pass(),
 101                             culled_rect,
 102                             quad_list_,
 103                             occlusion_tracker_,
 104                             layer_,
 105                             show_culling_with_debug_border_quads_);
 106 }
 107
 108 }  // namespace cc