cc/layers/painted_scrollbar_layer_impl.cc

   1 // Copyright 2013 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/painted_scrollbar_layer_impl.h"
   6
   7 #include <algorithm>
   8
   9 #include "cc/animation/scrollbar_animation_controller.h"
  10 #include "cc/layers/layer.h"
  11 #include "cc/quads/solid_color_draw_quad.h"
  12 #include "cc/quads/texture_draw_quad.h"
  13 #include "cc/trees/layer_tree_impl.h"
  14 #include "cc/trees/layer_tree_settings.h"
  15 #include "cc/trees/occlusion_tracker.h"
  16 #include "ui/gfx/rect_conversions.h"
  17
  18 namespace cc {
  19
  20 scoped_ptr<PaintedScrollbarLayerImpl> PaintedScrollbarLayerImpl::Create(
  21     LayerTreeImpl* tree_impl,
  22     int id,
  23     ScrollbarOrientation orientation) {
  24   return make_scoped_ptr(
  25       new PaintedScrollbarLayerImpl(tree_impl, id, orientation));
  26 }
  27
  28 PaintedScrollbarLayerImpl::PaintedScrollbarLayerImpl(
  29     LayerTreeImpl* tree_impl,
  30     int id,
  31     ScrollbarOrientation orientation)
  32     : ScrollbarLayerImplBase(tree_impl, id, orientation, false, false),
  33       track_ui_resource_id_(0),
  34       thumb_ui_resource_id_(0),
  35       thumb_thickness_(0),
  36       thumb_length_(0),
  37       track_start_(0),
  38       track_length_(0),
  39       vertical_adjust_(0.f),
  40       scroll_layer_id_(Layer::INVALID_ID) {}
  41
  42 PaintedScrollbarLayerImpl::~PaintedScrollbarLayerImpl() {}
  43
  44 scoped_ptr<LayerImpl> PaintedScrollbarLayerImpl::CreateLayerImpl(
  45     LayerTreeImpl* tree_impl) {
  46   return PaintedScrollbarLayerImpl::Create(tree_impl, id(), orientation());
  47 }
  48
  49 void PaintedScrollbarLayerImpl::PushPropertiesTo(LayerImpl* layer) {
  50   ScrollbarLayerImplBase::PushPropertiesTo(layer);
  51
  52   PaintedScrollbarLayerImpl* scrollbar_layer =
  53       static_cast<PaintedScrollbarLayerImpl*>(layer);
  54
  55   scrollbar_layer->SetThumbThickness(thumb_thickness_);
  56   scrollbar_layer->SetThumbLength(thumb_length_);
  57   scrollbar_layer->SetTrackStart(track_start_);
  58   scrollbar_layer->SetTrackLength(track_length_);
  59
  60   scrollbar_layer->set_track_ui_resource_id(track_ui_resource_id_);
  61   scrollbar_layer->set_thumb_ui_resource_id(thumb_ui_resource_id_);
  62 }
  63
  64 bool PaintedScrollbarLayerImpl::WillDraw(DrawMode draw_mode,
  65                                   ResourceProvider* resource_provider) {
  66   DCHECK(draw_mode != DRAW_MODE_RESOURCELESS_SOFTWARE);
  67   return LayerImpl::WillDraw(draw_mode, resource_provider);
  68 }
  69
  70 void PaintedScrollbarLayerImpl::AppendQuads(
  71     RenderPass* render_pass,
  72     const OcclusionTracker<LayerImpl>& occlusion_tracker,
  73     AppendQuadsData* append_quads_data) {
  74   bool premultipled_alpha = true;
  75   bool flipped = false;
  76   gfx::PointF uv_top_left(0.f, 0.f);
  77   gfx::PointF uv_bottom_right(1.f, 1.f);
  78   gfx::Rect content_bounds_rect(content_bounds());
  79
  80   SharedQuadState* shared_quad_state =
  81       render_pass->CreateAndAppendSharedQuadState();
  82   PopulateSharedQuadState(shared_quad_state);
  83
  84   AppendDebugBorderQuad(
  85       render_pass, content_bounds(), shared_quad_state, append_quads_data);
  86
  87   gfx::Rect thumb_quad_rect = ComputeThumbQuadRect();
  88   Occlusion occlusion =
  89       occlusion_tracker.GetCurrentOcclusionForLayer(draw_transform());
  90   gfx::Rect visible_thumb_quad_rect =
  91       occlusion.GetUnoccludedContentRect(thumb_quad_rect);
  92
  93   ResourceProvider::ResourceId thumb_resource_id =
  94       layer_tree_impl()->ResourceIdForUIResource(thumb_ui_resource_id_);
  95   ResourceProvider::ResourceId track_resource_id =
  96       layer_tree_impl()->ResourceIdForUIResource(track_ui_resource_id_);
  97
  98   if (thumb_resource_id && !visible_thumb_quad_rect.IsEmpty()) {
  99     gfx::Rect opaque_rect;
 100     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
 101     TextureDrawQuad* quad =
 102         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 103     quad->SetNew(shared_quad_state,
 104                  thumb_quad_rect,
 105                  opaque_rect,
 106                  visible_thumb_quad_rect,
 107                  thumb_resource_id,
 108                  premultipled_alpha,
 109                  uv_top_left,
 110                  uv_bottom_right,
 111                  SK_ColorTRANSPARENT,
 112                  opacity,
 113                  flipped);
 114   }
 115
 116   gfx::Rect track_quad_rect = content_bounds_rect;
 117   gfx::Rect visible_track_quad_rect =
 118       occlusion.GetUnoccludedContentRect(track_quad_rect);
 119   if (track_resource_id && !visible_track_quad_rect.IsEmpty()) {
 120     gfx::Rect opaque_rect(contents_opaque() ? track_quad_rect : gfx::Rect());
 121     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
 122     TextureDrawQuad* quad =
 123         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 124     quad->SetNew(shared_quad_state,
 125                  track_quad_rect,
 126                  opaque_rect,
 127                  visible_track_quad_rect,
 128                  track_resource_id,
 129                  premultipled_alpha,
 130                  uv_top_left,
 131                  uv_bottom_right,
 132                  SK_ColorTRANSPARENT,
 133                  opacity,
 134                  flipped);
 135   }
 136 }
 137
 138 void PaintedScrollbarLayerImpl::SetThumbThickness(int thumb_thickness) {
 139   if (thumb_thickness_ == thumb_thickness)
 140     return;
 141   thumb_thickness_ = thumb_thickness;
 142   NoteLayerPropertyChanged();
 143 }
 144
 145 int PaintedScrollbarLayerImpl::ThumbThickness() const {
 146   return thumb_thickness_;
 147 }
 148
 149 void PaintedScrollbarLayerImpl::SetThumbLength(int thumb_length) {
 150   if (thumb_length_ == thumb_length)
 151     return;
 152   thumb_length_ = thumb_length;
 153   NoteLayerPropertyChanged();
 154 }
 155
 156 int PaintedScrollbarLayerImpl::ThumbLength() const {
 157   return thumb_length_;
 158 }
 159
 160 void PaintedScrollbarLayerImpl::SetTrackStart(int track_start) {
 161   if (track_start_ == track_start)
 162     return;
 163   track_start_ = track_start;
 164   NoteLayerPropertyChanged();
 165 }
 166
 167 int PaintedScrollbarLayerImpl::TrackStart() const {
 168   return track_start_;
 169 }
 170
 171 void PaintedScrollbarLayerImpl::SetTrackLength(int track_length) {
 172   if (track_length_ == track_length)
 173     return;
 174   track_length_ = track_length;
 175   NoteLayerPropertyChanged();
 176 }
 177
 178 float PaintedScrollbarLayerImpl::TrackLength() const {
 179   return track_length_ + (orientation() == VERTICAL ? vertical_adjust() : 0);
 180 }
 181
 182 bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
 183   return false;
 184 }
 185
 186 const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
 187   return "cc::PaintedScrollbarLayerImpl";
 188 }
 189
 190 }  // namespace cc