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.h"
  16 #include "ui/gfx/geometry/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 Occlusion& occlusion_in_content_space,
  73     AppendQuadsData* append_quads_data) {
  74   bool premultipled_alpha = true;
  75   bool flipped = false;
  76   bool nearest_neighbor = false;
  77   gfx::PointF uv_top_left(0.f, 0.f);
  78   gfx::PointF uv_bottom_right(1.f, 1.f);
  79   gfx::Rect bounds_rect(bounds());
  80   gfx::Rect content_bounds_rect(content_bounds());
  81
  82   SharedQuadState* shared_quad_state =
  83       render_pass->CreateAndAppendSharedQuadState();
  84   PopulateSharedQuadState(shared_quad_state);
  85
  86   AppendDebugBorderQuad(
  87       render_pass, content_bounds(), shared_quad_state, append_quads_data);
  88
  89   gfx::Rect thumb_quad_rect = ComputeThumbQuadRect();
  90   gfx::Rect visible_thumb_quad_rect =
  91       occlusion_in_content_space.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                  nearest_neighbor);
 115   }
 116
 117   gfx::Rect track_quad_rect = content_bounds_rect;
 118   gfx::Rect visible_track_quad_rect =
 119       occlusion_in_content_space.GetUnoccludedContentRect(track_quad_rect);
 120   if (track_resource_id && !visible_track_quad_rect.IsEmpty()) {
 121     gfx::Rect opaque_rect(contents_opaque() ? track_quad_rect : gfx::Rect());
 122     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
 123     TextureDrawQuad* quad =
 124         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 125     quad->SetNew(shared_quad_state,
 126                  track_quad_rect,
 127                  opaque_rect,
 128                  visible_track_quad_rect,
 129                  track_resource_id,
 130                  premultipled_alpha,
 131                  uv_top_left,
 132                  uv_bottom_right,
 133                  SK_ColorTRANSPARENT,
 134                  opacity,
 135                  flipped,
 136                  nearest_neighbor);
 137   }
 138 }
 139
 140 void PaintedScrollbarLayerImpl::SetThumbThickness(int thumb_thickness) {
 141   if (thumb_thickness_ == thumb_thickness)
 142     return;
 143   thumb_thickness_ = thumb_thickness;
 144   NoteLayerPropertyChanged();
 145 }
 146
 147 int PaintedScrollbarLayerImpl::ThumbThickness() const {
 148   return thumb_thickness_;
 149 }
 150
 151 void PaintedScrollbarLayerImpl::SetThumbLength(int thumb_length) {
 152   if (thumb_length_ == thumb_length)
 153     return;
 154   thumb_length_ = thumb_length;
 155   NoteLayerPropertyChanged();
 156 }
 157
 158 int PaintedScrollbarLayerImpl::ThumbLength() const {
 159   return thumb_length_;
 160 }
 161
 162 void PaintedScrollbarLayerImpl::SetTrackStart(int track_start) {
 163   if (track_start_ == track_start)
 164     return;
 165   track_start_ = track_start;
 166   NoteLayerPropertyChanged();
 167 }
 168
 169 int PaintedScrollbarLayerImpl::TrackStart() const {
 170   return track_start_;
 171 }
 172
 173 void PaintedScrollbarLayerImpl::SetTrackLength(int track_length) {
 174   if (track_length_ == track_length)
 175     return;
 176   track_length_ = track_length;
 177   NoteLayerPropertyChanged();
 178 }
 179
 180 float PaintedScrollbarLayerImpl::TrackLength() const {
 181   return track_length_ + (orientation() == VERTICAL ? vertical_adjust() : 0);
 182 }
 183
 184 bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
 185   return false;
 186 }
 187
 188 const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
 189   return "cc::PaintedScrollbarLayerImpl";
 190 }
 191
 192 }  // namespace cc