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       internal_contents_scale_(1.f),
  36       thumb_thickness_(0),
  37       thumb_length_(0),
  38       track_start_(0),
  39       track_length_(0) {
  40 }
  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->set_internal_contents_scale_and_bounds(
  56       internal_contents_scale_, internal_content_bounds_);
  57
  58   scrollbar_layer->SetThumbThickness(thumb_thickness_);
  59   scrollbar_layer->SetThumbLength(thumb_length_);
  60   scrollbar_layer->SetTrackStart(track_start_);
  61   scrollbar_layer->SetTrackLength(track_length_);
  62
  63   scrollbar_layer->set_track_ui_resource_id(track_ui_resource_id_);
  64   scrollbar_layer->set_thumb_ui_resource_id(thumb_ui_resource_id_);
  65 }
  66
  67 bool PaintedScrollbarLayerImpl::WillDraw(DrawMode draw_mode,
  68                                   ResourceProvider* resource_provider) {
  69   DCHECK(draw_mode != DRAW_MODE_RESOURCELESS_SOFTWARE);
  70   return LayerImpl::WillDraw(draw_mode, resource_provider);
  71 }
  72
  73 void PaintedScrollbarLayerImpl::AppendQuads(
  74     RenderPass* render_pass,
  75     AppendQuadsData* append_quads_data) {
  76   bool premultipled_alpha = true;
  77   bool flipped = false;
  78   bool nearest_neighbor = false;
  79   gfx::PointF uv_top_left(0.f, 0.f);
  80   gfx::PointF uv_bottom_right(1.f, 1.f);
  81
  82   SharedQuadState* shared_quad_state =
  83       render_pass->CreateAndAppendSharedQuadState();
  84   PopulateScaledSharedQuadState(shared_quad_state, internal_contents_scale_);
  85
  86   AppendDebugBorderQuad(render_pass, internal_content_bounds_,
  87                         shared_quad_state, append_quads_data);
  88
  89   gfx::Rect thumb_quad_rect = ComputeThumbQuadRect();
  90   gfx::Rect scaled_thumb_quad_rect =
  91       gfx::ScaleToEnclosingRect(thumb_quad_rect, internal_contents_scale_);
  92   gfx::Rect visible_thumb_quad_rect =
  93       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
  94           thumb_quad_rect);
  95   gfx::Rect scaled_visible_thumb_quad_rect = gfx::ScaleToEnclosingRect(
  96       visible_thumb_quad_rect, internal_contents_scale_);
  97
  98   ResourceId thumb_resource_id =
  99       layer_tree_impl()->ResourceIdForUIResource(thumb_ui_resource_id_);
 100   ResourceId track_resource_id =
 101       layer_tree_impl()->ResourceIdForUIResource(track_ui_resource_id_);
 102
 103   if (thumb_resource_id && !visible_thumb_quad_rect.IsEmpty()) {
 104     gfx::Rect opaque_rect;
 105     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
 106     TextureDrawQuad* quad =
 107         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 108     quad->SetNew(shared_quad_state, scaled_thumb_quad_rect, opaque_rect,
 109                  scaled_visible_thumb_quad_rect, thumb_resource_id,
 110                  premultipled_alpha, uv_top_left, uv_bottom_right,
 111                  SK_ColorTRANSPARENT, opacity, flipped, nearest_neighbor);
 112     ValidateQuadResources(quad);
 113   }
 114
 115   gfx::Rect track_quad_rect(bounds());
 116   gfx::Rect scaled_track_quad_rect(internal_content_bounds_);
 117   gfx::Rect visible_track_quad_rect =
 118       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
 119           track_quad_rect);
 120   gfx::Rect scaled_visible_track_quad_rect = gfx::ScaleToEnclosingRect(
 121       visible_track_quad_rect, internal_contents_scale_);
 122   if (track_resource_id && !visible_track_quad_rect.IsEmpty()) {
 123     gfx::Rect opaque_rect(contents_opaque() ? scaled_track_quad_rect
 124                                             : gfx::Rect());
 125     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
 126     TextureDrawQuad* quad =
 127         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 128     quad->SetNew(shared_quad_state, scaled_track_quad_rect, opaque_rect,
 129                  scaled_visible_track_quad_rect, track_resource_id,
 130                  premultipled_alpha, uv_top_left, uv_bottom_right,
 131                  SK_ColorTRANSPARENT, opacity, flipped, nearest_neighbor);
 132     ValidateQuadResources(quad);
 133   }
 134 }
 135
 136 gfx::Rect PaintedScrollbarLayerImpl::GetEnclosingRectInTargetSpace() const {
 137   if (internal_content_bounds_.IsEmpty())
 138     return gfx::Rect();
 139   DCHECK_GT(internal_contents_scale_, 0.f);
 140   return GetScaledEnclosingRectInTargetSpace(internal_contents_scale_);
 141 }
 142
 143 void PaintedScrollbarLayerImpl::SetThumbThickness(int thumb_thickness) {
 144   if (thumb_thickness_ == thumb_thickness)
 145     return;
 146   thumb_thickness_ = thumb_thickness;
 147   NoteLayerPropertyChanged();
 148 }
 149
 150 int PaintedScrollbarLayerImpl::ThumbThickness() const {
 151   return thumb_thickness_;
 152 }
 153
 154 void PaintedScrollbarLayerImpl::SetThumbLength(int thumb_length) {
 155   if (thumb_length_ == thumb_length)
 156     return;
 157   thumb_length_ = thumb_length;
 158   NoteLayerPropertyChanged();
 159 }
 160
 161 int PaintedScrollbarLayerImpl::ThumbLength() const {
 162   return thumb_length_;
 163 }
 164
 165 void PaintedScrollbarLayerImpl::SetTrackStart(int track_start) {
 166   if (track_start_ == track_start)
 167     return;
 168   track_start_ = track_start;
 169   NoteLayerPropertyChanged();
 170 }
 171
 172 int PaintedScrollbarLayerImpl::TrackStart() const {
 173   return track_start_;
 174 }
 175
 176 void PaintedScrollbarLayerImpl::SetTrackLength(int track_length) {
 177   if (track_length_ == track_length)
 178     return;
 179   track_length_ = track_length;
 180   NoteLayerPropertyChanged();
 181 }
 182
 183 float PaintedScrollbarLayerImpl::TrackLength() const {
 184   return track_length_ + (orientation() == VERTICAL ? vertical_adjust() : 0);
 185 }
 186
 187 bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
 188   return false;
 189 }
 190
 191 const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
 192   return "cc::PaintedScrollbarLayerImpl";
 193 }
 194
 195 }  // namespace cc