cc/layers/render_surface_impl.cc

   1 // Copyright 2011 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/layers/render_surface_impl.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/logging.h"
  10 #include "base/strings/stringprintf.h"
  11 #include "cc/base/math_util.h"
  12 #include "cc/debug/debug_colors.h"
  13 #include "cc/layers/delegated_renderer_layer_impl.h"
  14 #include "cc/layers/layer_impl.h"
  15 #include "cc/layers/render_pass_sink.h"
  16 #include "cc/quads/debug_border_draw_quad.h"
  17 #include "cc/quads/render_pass.h"
  18 #include "cc/quads/render_pass_draw_quad.h"
  19 #include "cc/quads/shared_quad_state.h"
  20 #include "cc/trees/damage_tracker.h"
  21 #include "cc/trees/occlusion.h"
  22 #include "third_party/skia/include/core/SkImageFilter.h"
  23 #include "ui/gfx/geometry/rect_conversions.h"
  24 #include "ui/gfx/transform.h"
  25
  26 namespace cc {
  27
  28 RenderSurfaceImpl::RenderSurfaceImpl(LayerImpl* owning_layer)
  29     : owning_layer_(owning_layer),
  30       surface_property_changed_(false),
  31       is_clipped_(false),
  32       contributes_to_drawn_surface_(false),
  33       draw_opacity_(1),
  34       nearest_occlusion_immune_ancestor_(nullptr),
  35       target_render_surface_layer_index_history_(0),
  36       current_layer_index_history_(0) {
  37   damage_tracker_ = DamageTracker::Create();
  38 }
  39
  40 RenderSurfaceImpl::~RenderSurfaceImpl() {}
  41
  42 gfx::RectF RenderSurfaceImpl::DrawableContentRect() const {
  43   gfx::RectF drawable_content_rect =
  44       MathUtil::MapClippedRect(draw_transform_, content_rect_);
  45   if (owning_layer_->has_replica()) {
  46     drawable_content_rect.Union(
  47         MathUtil::MapClippedRect(replica_draw_transform_, content_rect_));
  48   }
  49
  50   return drawable_content_rect;
  51 }
  52
  53 SkColor RenderSurfaceImpl::GetDebugBorderColor() const {
  54   return DebugColors::SurfaceBorderColor();
  55 }
  56
  57 SkColor RenderSurfaceImpl::GetReplicaDebugBorderColor() const {
  58   return DebugColors::SurfaceReplicaBorderColor();
  59 }
  60
  61 float RenderSurfaceImpl::GetDebugBorderWidth() const {
  62   return DebugColors::SurfaceBorderWidth(owning_layer_->layer_tree_impl());
  63 }
  64
  65 float RenderSurfaceImpl::GetReplicaDebugBorderWidth() const {
  66   return DebugColors::SurfaceReplicaBorderWidth(
  67       owning_layer_->layer_tree_impl());
  68 }
  69
  70 int RenderSurfaceImpl::OwningLayerId() const {
  71   return owning_layer_ ? owning_layer_->id() : 0;
  72 }
  73
  74
  75 void RenderSurfaceImpl::SetClipRect(const gfx::Rect& clip_rect) {
  76   if (clip_rect_ == clip_rect)
  77     return;
  78
  79   surface_property_changed_ = true;
  80   clip_rect_ = clip_rect;
  81 }
  82
  83 void RenderSurfaceImpl::SetContentRect(const gfx::Rect& content_rect) {
  84   if (content_rect_ == content_rect)
  85     return;
  86
  87   surface_property_changed_ = true;
  88   content_rect_ = content_rect;
  89 }
  90
  91 bool RenderSurfaceImpl::SurfacePropertyChanged() const {
  92   // Surface property changes are tracked as follows:
  93   //
  94   // - surface_property_changed_ is flagged when the clip_rect or content_rect
  95   //   change. As of now, these are the only two properties that can be affected
  96   //   by descendant layers.
  97   //
  98   // - all other property changes come from the owning layer (or some ancestor
  99   //   layer that propagates its change to the owning layer).
 100   //
 101   DCHECK(owning_layer_);
 102   return surface_property_changed_ || owning_layer_->LayerPropertyChanged();
 103 }
 104
 105 bool RenderSurfaceImpl::SurfacePropertyChangedOnlyFromDescendant() const {
 106   return surface_property_changed_ && !owning_layer_->LayerPropertyChanged();
 107 }
 108
 109 void RenderSurfaceImpl::AddContributingDelegatedRenderPassLayer(
 110     LayerImpl* layer) {
 111   DCHECK(std::find(layer_list_.begin(), layer_list_.end(), layer) !=
 112          layer_list_.end());
 113   DelegatedRendererLayerImpl* delegated_renderer_layer =
 114       static_cast<DelegatedRendererLayerImpl*>(layer);
 115   contributing_delegated_render_pass_layer_list_.push_back(
 116       delegated_renderer_layer);
 117 }
 118
 119 void RenderSurfaceImpl::ClearLayerLists() {
 120   layer_list_.clear();
 121   contributing_delegated_render_pass_layer_list_.clear();
 122 }
 123
 124 RenderPassId RenderSurfaceImpl::GetRenderPassId() {
 125   int layer_id = owning_layer_->id();
 126   int sub_id = 0;
 127   DCHECK_GT(layer_id, 0);
 128   return RenderPassId(layer_id, sub_id);
 129 }
 130
 131 void RenderSurfaceImpl::AppendRenderPasses(RenderPassSink* pass_sink) {
 132   for (size_t i = 0;
 133        i < contributing_delegated_render_pass_layer_list_.size();
 134        ++i) {
 135     DelegatedRendererLayerImpl* delegated_renderer_layer =
 136         contributing_delegated_render_pass_layer_list_[i];
 137     delegated_renderer_layer->AppendContributingRenderPasses(pass_sink);
 138   }
 139
 140   scoped_ptr<RenderPass> pass = RenderPass::Create(layer_list_.size());
 141   pass->SetNew(GetRenderPassId(),
 142                content_rect_,
 143                gfx::IntersectRects(content_rect_,
 144                                    damage_tracker_->current_damage_rect()),
 145                screen_space_transform_);
 146   pass_sink->AppendRenderPass(pass.Pass());
 147 }
 148
 149 void RenderSurfaceImpl::AppendQuads(RenderPass* render_pass,
 150                                     const gfx::Transform& draw_transform,
 151                                     const Occlusion& occlusion_in_content_space,
 152                                     SkColor debug_border_color,
 153                                     float debug_border_width,
 154                                     LayerImpl* mask_layer,
 155                                     AppendQuadsData* append_quads_data,
 156                                     RenderPassId render_pass_id) {
 157   gfx::Rect visible_layer_rect =
 158       occlusion_in_content_space.GetUnoccludedContentRect(content_rect_);
 159   if (visible_layer_rect.IsEmpty())
 160     return;
 161
 162   SharedQuadState* shared_quad_state =
 163       render_pass->CreateAndAppendSharedQuadState();
 164   shared_quad_state->SetAll(draw_transform, content_rect_.size(), content_rect_,
 165                             clip_rect_, is_clipped_, draw_opacity_,
 166                             owning_layer_->blend_mode(),
 167                             owning_layer_->sorting_context_id());
 168
 169   if (owning_layer_->ShowDebugBorders()) {
 170     DebugBorderDrawQuad* debug_border_quad =
 171         render_pass->CreateAndAppendDrawQuad<DebugBorderDrawQuad>();
 172     debug_border_quad->SetNew(shared_quad_state, content_rect_,
 173                               visible_layer_rect, debug_border_color,
 174                               debug_border_width);
 175   }
 176
 177   ResourceId mask_resource_id = 0;
 178   gfx::Size mask_texture_size;
 179   gfx::Vector2dF mask_uv_scale;
 180   if (mask_layer && mask_layer->DrawsContent() &&
 181       !mask_layer->bounds().IsEmpty()) {
 182     mask_layer->GetContentsResourceId(&mask_resource_id, &mask_texture_size);
 183     gfx::Vector2dF owning_layer_draw_scale =
 184         MathUtil::ComputeTransform2dScaleComponents(
 185             owning_layer_->draw_transform(), 1.f);
 186     gfx::SizeF unclipped_mask_target_size =
 187         gfx::ScaleSize(owning_layer_->bounds(), owning_layer_draw_scale.x(),
 188                        owning_layer_draw_scale.y());
 189     mask_uv_scale = gfx::Vector2dF(
 190         content_rect_.width() / unclipped_mask_target_size.width(),
 191         content_rect_.height() / unclipped_mask_target_size.height());
 192   }
 193
 194   DCHECK(owning_layer_->draw_properties().target_space_transform.IsScale2d());
 195   gfx::Vector2dF owning_layer_to_target_scale =
 196       owning_layer_->draw_properties().target_space_transform.Scale2d();
 197
 198   RenderPassDrawQuad* quad =
 199       render_pass->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
 200   quad->SetNew(shared_quad_state, content_rect_, visible_layer_rect,
 201                render_pass_id, mask_resource_id, mask_uv_scale,
 202                mask_texture_size, owning_layer_->filters(),
 203                owning_layer_to_target_scale,
 204                owning_layer_->background_filters());
 205 }
 206
 207 }  // namespace cc