cc/layers/heads_up_display_layer_impl.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/layers/heads_up_display_layer_impl.h"
   6
   7 #include <algorithm>
   8 #include <vector>
   9
  10 #include "base/numerics/safe_conversions.h"
  11 #include "base/strings/stringprintf.h"
  12 #include "base/trace_event/trace_event.h"
  13 #include "base/trace_event/trace_event_argument.h"
  14 #include "cc/debug/debug_colors.h"
  15 #include "cc/debug/frame_rate_counter.h"
  16 #include "cc/output/begin_frame_args.h"
  17 #include "cc/output/renderer.h"
  18 #include "cc/quads/texture_draw_quad.h"
  19 #include "cc/resources/memory_history.h"
  20 #include "cc/trees/layer_tree_host_impl.h"
  21 #include "cc/trees/layer_tree_impl.h"
  22 #include "skia/ext/platform_canvas.h"
  23 #include "third_party/skia/include/core/SkPaint.h"
  24 #include "third_party/skia/include/core/SkPath.h"
  25 #include "third_party/skia/include/core/SkTypeface.h"
  26 #include "third_party/skia/include/effects/SkColorMatrixFilter.h"
  27 #include "ui/gfx/geometry/point.h"
  28 #include "ui/gfx/geometry/size.h"
  29 #include "ui/gfx/geometry/size_conversions.h"
  30 #include "ui/gfx/hud_font.h"
  31
  32 namespace cc {
  33
  34 static inline SkPaint CreatePaint() {
  35   SkPaint paint;
  36 #if (SK_R32_SHIFT || SK_B32_SHIFT != 16)
  37   // The SkCanvas is in RGBA but the shader is expecting BGRA, so we need to
  38   // swizzle our colors when drawing to the SkCanvas.
  39   SkColorMatrix swizzle_matrix;
  40   for (int i = 0; i < 20; ++i)
  41     swizzle_matrix.fMat[i] = 0;
  42   swizzle_matrix.fMat[0 + 5 * 2] = 1;
  43   swizzle_matrix.fMat[1 + 5 * 1] = 1;
  44   swizzle_matrix.fMat[2 + 5 * 0] = 1;
  45   swizzle_matrix.fMat[3 + 5 * 3] = 1;
  46
  47   skia::RefPtr<SkColorMatrixFilter> filter =
  48       skia::AdoptRef(SkColorMatrixFilter::Create(swizzle_matrix));
  49   paint.setColorFilter(filter.get());
  50 #endif
  51   return paint;
  52 }
  53
  54 HeadsUpDisplayLayerImpl::Graph::Graph(double indicator_value,
  55                                       double start_upper_bound)
  56     : value(0.0),
  57       min(0.0),
  58       max(0.0),
  59       current_upper_bound(start_upper_bound),
  60       default_upper_bound(start_upper_bound),
  61       indicator(indicator_value) {}
  62
  63 double HeadsUpDisplayLayerImpl::Graph::UpdateUpperBound() {
  64   double target_upper_bound = std::max(max, default_upper_bound);
  65   current_upper_bound += (target_upper_bound - current_upper_bound) * 0.5;
  66   return current_upper_bound;
  67 }
  68
  69 HeadsUpDisplayLayerImpl::HeadsUpDisplayLayerImpl(LayerTreeImpl* tree_impl,
  70                                                  int id)
  71     : LayerImpl(tree_impl, id),
  72       typeface_(gfx::GetHudTypeface()),
  73       internal_contents_scale_(1.f),
  74       fps_graph_(60.0, 80.0),
  75       paint_time_graph_(16.0, 48.0),
  76       fade_step_(0) {
  77   if (!typeface_) {
  78     typeface_ = skia::AdoptRef(
  79         SkTypeface::CreateFromName("monospace", SkTypeface::kBold));
  80   }
  81 }
  82
  83 HeadsUpDisplayLayerImpl::~HeadsUpDisplayLayerImpl() {}
  84
  85 scoped_ptr<LayerImpl> HeadsUpDisplayLayerImpl::CreateLayerImpl(
  86     LayerTreeImpl* tree_impl) {
  87   return HeadsUpDisplayLayerImpl::Create(tree_impl, id());
  88 }
  89
  90 void HeadsUpDisplayLayerImpl::AcquireResource(
  91     ResourceProvider* resource_provider) {
  92   for (ScopedPtrVector<ScopedResource>::iterator it = resources_.begin();
  93        it != resources_.end();
  94        ++it) {
  95     if (!resource_provider->InUseByConsumer((*it)->id())) {
  96       resources_.swap(it, resources_.end() - 1);
  97       return;
  98     }
  99   }
 100
 101   scoped_ptr<ScopedResource> resource =
 102       ScopedResource::Create(resource_provider);
 103   resource->Allocate(internal_content_bounds_,
 104                      ResourceProvider::TEXTURE_HINT_IMMUTABLE, RGBA_8888);
 105   resources_.push_back(resource.Pass());
 106 }
 107
 108 class ResourceSizeIsEqualTo {
 109  public:
 110   explicit ResourceSizeIsEqualTo(const gfx::Size& size_)
 111       : compare_size_(size_) {}
 112
 113   bool operator()(const ScopedResource* resource) {
 114     return resource->size() == compare_size_;
 115   }
 116
 117  private:
 118   const gfx::Size compare_size_;
 119 };
 120
 121 void HeadsUpDisplayLayerImpl::ReleaseUnmatchedSizeResources(
 122     ResourceProvider* resource_provider) {
 123   ScopedPtrVector<ScopedResource>::iterator it_erase =
 124       resources_.partition(ResourceSizeIsEqualTo(internal_content_bounds_));
 125   resources_.erase(it_erase, resources_.end());
 126 }
 127
 128 bool HeadsUpDisplayLayerImpl::WillDraw(DrawMode draw_mode,
 129                                        ResourceProvider* resource_provider) {
 130   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
 131     return false;
 132
 133   internal_contents_scale_ = GetIdealContentsScale();
 134   internal_content_bounds_ =
 135       gfx::ToCeiledSize(gfx::ScaleSize(bounds(), internal_contents_scale_));
 136
 137   ReleaseUnmatchedSizeResources(resource_provider);
 138   AcquireResource(resource_provider);
 139   return LayerImpl::WillDraw(draw_mode, resource_provider);
 140 }
 141
 142 void HeadsUpDisplayLayerImpl::AppendQuads(
 143     RenderPass* render_pass,
 144     AppendQuadsData* append_quads_data) {
 145   if (!resources_.back()->id())
 146     return;
 147
 148   SharedQuadState* shared_quad_state =
 149       render_pass->CreateAndAppendSharedQuadState();
 150   PopulateScaledSharedQuadState(shared_quad_state, internal_contents_scale_);
 151
 152   gfx::Rect quad_rect(internal_content_bounds_);
 153   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
 154   gfx::Rect visible_quad_rect(quad_rect);
 155   bool premultiplied_alpha = true;
 156   gfx::PointF uv_top_left(0.f, 0.f);
 157   gfx::PointF uv_bottom_right(1.f, 1.f);
 158   const float vertex_opacity[] = { 1.f, 1.f, 1.f, 1.f };
 159   bool flipped = false;
 160   bool nearest_neighbor = false;
 161   TextureDrawQuad* quad =
 162       render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 163   quad->SetNew(shared_quad_state,
 164                quad_rect,
 165                opaque_rect,
 166                visible_quad_rect,
 167                resources_.back()->id(),
 168                premultiplied_alpha,
 169                uv_top_left,
 170                uv_bottom_right,
 171                SK_ColorTRANSPARENT,
 172                vertex_opacity,
 173                flipped,
 174                nearest_neighbor);
 175   ValidateQuadResources(quad);
 176 }
 177
 178 void HeadsUpDisplayLayerImpl::UpdateHudTexture(
 179     DrawMode draw_mode,
 180     ResourceProvider* resource_provider) {
 181   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE || !resources_.back()->id())
 182     return;
 183
 184   SkISize canvas_size;
 185   if (hud_surface_)
 186     canvas_size = hud_surface_->getCanvas()->getDeviceSize();
 187   else
 188     canvas_size.set(0, 0);
 189
 190   if (canvas_size.width() != internal_content_bounds_.width() ||
 191       canvas_size.height() != internal_content_bounds_.height() ||
 192       !hud_surface_) {
 193     TRACE_EVENT0("cc", "ResizeHudCanvas");
 194
 195     hud_surface_ = skia::AdoptRef(SkSurface::NewRasterN32Premul(
 196         internal_content_bounds_.width(), internal_content_bounds_.height()));
 197   }
 198
 199   UpdateHudContents();
 200
 201   {
 202     TRACE_EVENT0("cc", "DrawHudContents");
 203     hud_surface_->getCanvas()->clear(SkColorSetARGB(0, 0, 0, 0));
 204     hud_surface_->getCanvas()->save();
 205     hud_surface_->getCanvas()->scale(internal_contents_scale_,
 206                                      internal_contents_scale_);
 207
 208     DrawHudContents(hud_surface_->getCanvas());
 209
 210     hud_surface_->getCanvas()->restore();
 211   }
 212
 213   TRACE_EVENT0("cc", "UploadHudTexture");
 214   SkImageInfo info;
 215   size_t row_bytes = 0;
 216   const void* pixels = hud_surface_->getCanvas()->peekPixels(&info, &row_bytes);
 217   DCHECK(pixels);
 218   DCHECK(info.colorType() == kN32_SkColorType);
 219   resource_provider->CopyToResource(resources_.back()->id(),
 220                                     static_cast<const uint8_t*>(pixels),
 221                                     internal_content_bounds_);
 222 }
 223
 224 void HeadsUpDisplayLayerImpl::ReleaseResources() {
 225   resources_.clear();
 226 }
 227
 228 gfx::Rect HeadsUpDisplayLayerImpl::GetEnclosingRectInTargetSpace() const {
 229   DCHECK_GT(internal_contents_scale_, 0.f);
 230   return GetScaledEnclosingRectInTargetSpace(internal_contents_scale_);
 231 }
 232
 233 void HeadsUpDisplayLayerImpl::UpdateHudContents() {
 234   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 235
 236   // Don't update numbers every frame so text is readable.
 237   base::TimeTicks now = layer_tree_impl()->CurrentBeginFrameArgs().frame_time;
 238   if (base::TimeDelta(now - time_of_last_graph_update_).InSecondsF() > 0.25f) {
 239     time_of_last_graph_update_ = now;
 240
 241     if (debug_state.show_fps_counter) {
 242       FrameRateCounter* fps_counter = layer_tree_impl()->frame_rate_counter();
 243       fps_graph_.value = fps_counter->GetAverageFPS();
 244       fps_counter->GetMinAndMaxFPS(&fps_graph_.min, &fps_graph_.max);
 245     }
 246
 247     if (debug_state.ShowMemoryStats()) {
 248       MemoryHistory* memory_history = layer_tree_impl()->memory_history();
 249       if (memory_history->End())
 250         memory_entry_ = **memory_history->End();
 251       else
 252         memory_entry_ = MemoryHistory::Entry();
 253     }
 254   }
 255
 256   fps_graph_.UpdateUpperBound();
 257   paint_time_graph_.UpdateUpperBound();
 258 }
 259
 260 void HeadsUpDisplayLayerImpl::DrawHudContents(SkCanvas* canvas) {
 261   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 262
 263   if (debug_state.ShowHudRects()) {
 264     DrawDebugRects(canvas, layer_tree_impl()->debug_rect_history());
 265     if (IsAnimatingHUDContents()) {
 266       layer_tree_impl()->SetNeedsRedraw();
 267     }
 268   }
 269
 270   if (!debug_state.show_fps_counter)
 271     return;
 272
 273   SkRect area =
 274       DrawFPSDisplay(canvas, layer_tree_impl()->frame_rate_counter(), 0, 0);
 275   area = DrawGpuRasterizationStatus(canvas, 0, area.bottom(),
 276                                     SkMaxScalar(area.width(), 150));
 277
 278   if (debug_state.ShowMemoryStats())
 279     DrawMemoryDisplay(canvas, 0, area.bottom(), SkMaxScalar(area.width(), 150));
 280 }
 281 int HeadsUpDisplayLayerImpl::MeasureText(SkPaint* paint,
 282                                          const std::string& text,
 283                                          int size) const {
 284   const bool anti_alias = paint->isAntiAlias();
 285   paint->setAntiAlias(true);
 286   paint->setTextSize(size);
 287   paint->setTypeface(typeface_.get());
 288   SkScalar text_width = paint->measureText(text.c_str(), text.length());
 289
 290   paint->setAntiAlias(anti_alias);
 291   return SkScalarCeilToInt(text_width);
 292 }
 293 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 294                                        SkPaint* paint,
 295                                        const std::string& text,
 296                                        SkPaint::Align align,
 297                                        int size,
 298                                        int x,
 299                                        int y) const {
 300   const bool anti_alias = paint->isAntiAlias();
 301   paint->setAntiAlias(true);
 302
 303   paint->setTextSize(size);
 304   paint->setTextAlign(align);
 305   paint->setTypeface(typeface_.get());
 306   canvas->drawText(text.c_str(), text.length(), x, y, *paint);
 307
 308   paint->setAntiAlias(anti_alias);
 309 }
 310
 311 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 312                                        SkPaint* paint,
 313                                        const std::string& text,
 314                                        SkPaint::Align align,
 315                                        int size,
 316                                        const SkPoint& pos) const {
 317   DrawText(canvas, paint, text, align, size, pos.x(), pos.y());
 318 }
 319
 320 void HeadsUpDisplayLayerImpl::DrawGraphBackground(SkCanvas* canvas,
 321                                                   SkPaint* paint,
 322                                                   const SkRect& bounds) const {
 323   paint->setColor(DebugColors::HUDBackgroundColor());
 324   canvas->drawRect(bounds, *paint);
 325 }
 326
 327 void HeadsUpDisplayLayerImpl::DrawGraphLines(SkCanvas* canvas,
 328                                              SkPaint* paint,
 329                                              const SkRect& bounds,
 330                                              const Graph& graph) const {
 331   // Draw top and bottom line.
 332   paint->setColor(DebugColors::HUDSeparatorLineColor());
 333   canvas->drawLine(bounds.left(),
 334                    bounds.top() - 1,
 335                    bounds.right(),
 336                    bounds.top() - 1,
 337                    *paint);
 338   canvas->drawLine(
 339       bounds.left(), bounds.bottom(), bounds.right(), bounds.bottom(), *paint);
 340
 341   // Draw indicator line (additive blend mode to increase contrast when drawn on
 342   // top of graph).
 343   paint->setColor(DebugColors::HUDIndicatorLineColor());
 344   paint->setXfermodeMode(SkXfermode::kPlus_Mode);
 345   const double indicator_top =
 346       bounds.height() * (1.0 - graph.indicator / graph.current_upper_bound) -
 347       1.0;
 348   canvas->drawLine(bounds.left(),
 349                    bounds.top() + indicator_top,
 350                    bounds.right(),
 351                    bounds.top() + indicator_top,
 352                    *paint);
 353   paint->setXfermode(nullptr);
 354 }
 355
 356 SkRect HeadsUpDisplayLayerImpl::DrawFPSDisplay(
 357     SkCanvas* canvas,
 358     const FrameRateCounter* fps_counter,
 359     int right,
 360     int top) const {
 361   const int kPadding = 4;
 362   const int kGap = 6;
 363
 364   const int kFontHeight = 15;
 365
 366   const int kGraphWidth =
 367       base::saturated_cast<int>(fps_counter->time_stamp_history_size()) - 2;
 368   const int kGraphHeight = 40;
 369
 370   const int kHistogramWidth = 37;
 371
 372   int width = kGraphWidth + kHistogramWidth + 4 * kPadding;
 373   int height = kFontHeight + kGraphHeight + 4 * kPadding + 2;
 374   int left = bounds().width() - width - right;
 375   SkRect area = SkRect::MakeXYWH(left, top, width, height);
 376
 377   SkPaint paint = CreatePaint();
 378   DrawGraphBackground(canvas, &paint, area);
 379
 380   SkRect text_bounds =
 381       SkRect::MakeXYWH(left + kPadding,
 382                        top + kPadding,
 383                        kGraphWidth + kHistogramWidth + kGap + 2,
 384                        kFontHeight);
 385   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 386                                          text_bounds.bottom() + 2 * kPadding,
 387                                          kGraphWidth,
 388                                          kGraphHeight);
 389   SkRect histogram_bounds = SkRect::MakeXYWH(graph_bounds.right() + kGap,
 390                                              graph_bounds.top(),
 391                                              kHistogramWidth,
 392                                              kGraphHeight);
 393
 394   const std::string value_text =
 395       base::StringPrintf("FPS:%5.1f", fps_graph_.value);
 396   const std::string min_max_text =
 397       base::StringPrintf("%.0f-%.0f", fps_graph_.min, fps_graph_.max);
 398
 399   VLOG(1) << value_text;
 400
 401   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 402   DrawText(canvas,
 403            &paint,
 404            value_text,
 405            SkPaint::kLeft_Align,
 406            kFontHeight,
 407            text_bounds.left(),
 408            text_bounds.bottom());
 409   DrawText(canvas,
 410            &paint,
 411            min_max_text,
 412            SkPaint::kRight_Align,
 413            kFontHeight,
 414            text_bounds.right(),
 415            text_bounds.bottom());
 416
 417   DrawGraphLines(canvas, &paint, graph_bounds, fps_graph_);
 418
 419   // Collect graph and histogram data.
 420   SkPath path;
 421
 422   const int kHistogramSize = 20;
 423   double histogram[kHistogramSize] = { 1.0 };
 424   double max_bucket_value = 1.0;
 425
 426   for (FrameRateCounter::RingBufferType::Iterator it = --fps_counter->end(); it;
 427        --it) {
 428     base::TimeDelta delta = fps_counter->RecentFrameInterval(it.index() + 1);
 429
 430     // Skip this particular instantaneous frame rate if it is not likely to have
 431     // been valid.
 432     if (!fps_counter->IsBadFrameInterval(delta)) {
 433       double fps = 1.0 / delta.InSecondsF();
 434
 435       // Clamp the FPS to the range we want to plot visually.
 436       double p = fps / fps_graph_.current_upper_bound;
 437       if (p > 1.0)
 438         p = 1.0;
 439
 440       // Plot this data point.
 441       SkPoint cur =
 442           SkPoint::Make(graph_bounds.left() + it.index(),
 443                         graph_bounds.bottom() - p * graph_bounds.height());
 444       if (path.isEmpty())
 445         path.moveTo(cur);
 446       else
 447         path.lineTo(cur);
 448
 449       // Use the fps value to find the right bucket in the histogram.
 450       int bucket_index = floor(p * (kHistogramSize - 1));
 451
 452       // Add the delta time to take the time spent at that fps rate into
 453       // account.
 454       histogram[bucket_index] += delta.InSecondsF();
 455       max_bucket_value = std::max(histogram[bucket_index], max_bucket_value);
 456     }
 457   }
 458
 459   // Draw FPS histogram.
 460   paint.setColor(DebugColors::HUDSeparatorLineColor());
 461   canvas->drawLine(histogram_bounds.left() - 1,
 462                    histogram_bounds.top() - 1,
 463                    histogram_bounds.left() - 1,
 464                    histogram_bounds.bottom() + 1,
 465                    paint);
 466   canvas->drawLine(histogram_bounds.right() + 1,
 467                    histogram_bounds.top() - 1,
 468                    histogram_bounds.right() + 1,
 469                    histogram_bounds.bottom() + 1,
 470                    paint);
 471
 472   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 473   const double bar_height = histogram_bounds.height() / kHistogramSize;
 474
 475   for (int i = kHistogramSize - 1; i >= 0; --i) {
 476     if (histogram[i] > 0) {
 477       double bar_width =
 478           histogram[i] / max_bucket_value * histogram_bounds.width();
 479       canvas->drawRect(
 480           SkRect::MakeXYWH(histogram_bounds.left(),
 481                            histogram_bounds.bottom() - (i + 1) * bar_height,
 482                            bar_width,
 483                            1),
 484           paint);
 485     }
 486   }
 487
 488   // Draw FPS graph.
 489   paint.setAntiAlias(true);
 490   paint.setStyle(SkPaint::kStroke_Style);
 491   paint.setStrokeWidth(1);
 492   canvas->drawPath(path, paint);
 493
 494   return area;
 495 }
 496
 497 SkRect HeadsUpDisplayLayerImpl::DrawMemoryDisplay(SkCanvas* canvas,
 498                                                   int right,
 499                                                   int top,
 500                                                   int width) const {
 501   if (!memory_entry_.total_bytes_used)
 502     return SkRect::MakeEmpty();
 503
 504   const int kPadding = 4;
 505   const int kFontHeight = 13;
 506
 507   const int height = 3 * kFontHeight + 4 * kPadding;
 508   const int left = bounds().width() - width - right;
 509   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 510
 511   const double kMegabyte = 1024.0 * 1024.0;
 512
 513   SkPaint paint = CreatePaint();
 514   DrawGraphBackground(canvas, &paint, area);
 515
 516   SkPoint title_pos = SkPoint::Make(left + kPadding, top + kFontHeight);
 517   SkPoint stat1_pos = SkPoint::Make(left + width - kPadding - 1,
 518                                     top + kPadding + 2 * kFontHeight);
 519   SkPoint stat2_pos = SkPoint::Make(left + width - kPadding - 1,
 520                                     top + 2 * kPadding + 3 * kFontHeight);
 521
 522   paint.setColor(DebugColors::MemoryDisplayTextColor());
 523   DrawText(canvas,
 524            &paint,
 525            "GPU memory",
 526            SkPaint::kLeft_Align,
 527            kFontHeight,
 528            title_pos);
 529
 530   std::string text = base::StringPrintf(
 531       "%6.1f MB used", memory_entry_.total_bytes_used / kMegabyte);
 532   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat1_pos);
 533
 534   if (!memory_entry_.had_enough_memory)
 535     paint.setColor(SK_ColorRED);
 536   text = base::StringPrintf("%6.1f MB max ",
 537                             memory_entry_.total_budget_in_bytes / kMegabyte);
 538   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat2_pos);
 539
 540   return area;
 541 }
 542
 543 SkRect HeadsUpDisplayLayerImpl::DrawGpuRasterizationStatus(SkCanvas* canvas,
 544                                                            int right,
 545                                                            int top,
 546                                                            int width) const {
 547   std::string status;
 548   SkColor color = SK_ColorRED;
 549   switch (layer_tree_impl()->GetGpuRasterizationStatus()) {
 550     case GpuRasterizationStatus::ON:
 551       status = "on";
 552       color = SK_ColorGREEN;
 553       break;
 554     case GpuRasterizationStatus::ON_FORCED:
 555       status = "on (forced)";
 556       color = SK_ColorGREEN;
 557       break;
 558     case GpuRasterizationStatus::OFF_DEVICE:
 559       status = "off (device)";
 560       color = SK_ColorRED;
 561       break;
 562     case GpuRasterizationStatus::OFF_VIEWPORT:
 563       status = "off (viewport)";
 564       color = SK_ColorYELLOW;
 565       break;
 566     case GpuRasterizationStatus::MSAA_CONTENT:
 567       status = "MSAA (content)";
 568       color = SK_ColorCYAN;
 569       break;
 570     case GpuRasterizationStatus::OFF_CONTENT:
 571       status = "off (content)";
 572       color = SK_ColorYELLOW;
 573       break;
 574   }
 575
 576   if (status.empty())
 577     return SkRect::MakeEmpty();
 578
 579   const int kPadding = 4;
 580   const int kFontHeight = 13;
 581
 582   const int height = 2 * kFontHeight + 3 * kPadding;
 583   const int left = bounds().width() - width - right;
 584   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 585
 586   SkPaint paint = CreatePaint();
 587   DrawGraphBackground(canvas, &paint, area);
 588
 589   SkPoint gpu_status_pos = SkPoint::Make(left + width - kPadding,
 590                                          top + 2 * kFontHeight + 2 * kPadding);
 591
 592   paint.setColor(color);
 593   DrawText(canvas, &paint, "GPU raster: ", SkPaint::kLeft_Align, kFontHeight,
 594            left + kPadding, top + kFontHeight + kPadding);
 595   DrawText(canvas, &paint, status, SkPaint::kRight_Align, kFontHeight,
 596            gpu_status_pos);
 597
 598   return area;
 599 }
 600
 601 void HeadsUpDisplayLayerImpl::DrawDebugRect(
 602     SkCanvas* canvas,
 603     SkPaint* paint,
 604     const DebugRect& rect,
 605     SkColor stroke_color,
 606     SkColor fill_color,
 607     float stroke_width,
 608     const std::string& label_text) const {
 609   gfx::Rect debug_layer_rect =
 610       gfx::ScaleToEnclosingRect(rect.rect, 1.0 / internal_contents_scale_,
 611                                 1.0 / internal_contents_scale_);
 612   SkIRect sk_rect = RectToSkIRect(debug_layer_rect);
 613   paint->setColor(fill_color);
 614   paint->setStyle(SkPaint::kFill_Style);
 615   canvas->drawIRect(sk_rect, *paint);
 616
 617   paint->setColor(stroke_color);
 618   paint->setStyle(SkPaint::kStroke_Style);
 619   paint->setStrokeWidth(SkFloatToScalar(stroke_width));
 620   canvas->drawIRect(sk_rect, *paint);
 621
 622   if (label_text.length()) {
 623     const int kFontHeight = 12;
 624     const int kPadding = 3;
 625
 626     // The debug_layer_rect may be huge, and converting to a floating point may
 627     // be lossy, so intersect with the HUD layer bounds first to prevent that.
 628     gfx::Rect clip_rect = debug_layer_rect;
 629     clip_rect.Intersect(gfx::Rect(internal_content_bounds_));
 630     SkRect sk_clip_rect = RectToSkRect(clip_rect);
 631
 632     canvas->save();
 633     canvas->clipRect(sk_clip_rect);
 634     canvas->translate(sk_clip_rect.x(), sk_clip_rect.y());
 635
 636     SkPaint label_paint = CreatePaint();
 637     label_paint.setTextSize(kFontHeight);
 638     label_paint.setTypeface(typeface_.get());
 639     label_paint.setColor(stroke_color);
 640
 641     const SkScalar label_text_width =
 642         label_paint.measureText(label_text.c_str(), label_text.length());
 643     canvas->drawRect(SkRect::MakeWH(label_text_width + 2 * kPadding,
 644                                     kFontHeight + 2 * kPadding),
 645                      label_paint);
 646
 647     label_paint.setAntiAlias(true);
 648     label_paint.setColor(SkColorSetARGB(255, 50, 50, 50));
 649     canvas->drawText(label_text.c_str(),
 650                      label_text.length(),
 651                      kPadding,
 652                      kFontHeight * 0.8f + kPadding,
 653                      label_paint);
 654
 655     canvas->restore();
 656   }
 657 }
 658
 659 void HeadsUpDisplayLayerImpl::DrawDebugRects(
 660     SkCanvas* canvas,
 661     DebugRectHistory* debug_rect_history) {
 662   SkPaint paint = CreatePaint();
 663
 664   const std::vector<DebugRect>& debug_rects = debug_rect_history->debug_rects();
 665   std::vector<DebugRect> new_paint_rects;
 666
 667   for (size_t i = 0; i < debug_rects.size(); ++i) {
 668     SkColor stroke_color = 0;
 669     SkColor fill_color = 0;
 670     float stroke_width = 0.f;
 671     std::string label_text;
 672
 673     switch (debug_rects[i].type) {
 674       case PAINT_RECT_TYPE:
 675         new_paint_rects.push_back(debug_rects[i]);
 676         continue;
 677       case PROPERTY_CHANGED_RECT_TYPE:
 678         stroke_color = DebugColors::PropertyChangedRectBorderColor();
 679         fill_color = DebugColors::PropertyChangedRectFillColor();
 680         stroke_width = DebugColors::PropertyChangedRectBorderWidth();
 681         break;
 682       case SURFACE_DAMAGE_RECT_TYPE:
 683         stroke_color = DebugColors::SurfaceDamageRectBorderColor();
 684         fill_color = DebugColors::SurfaceDamageRectFillColor();
 685         stroke_width = DebugColors::SurfaceDamageRectBorderWidth();
 686         break;
 687       case REPLICA_SCREEN_SPACE_RECT_TYPE:
 688         stroke_color = DebugColors::ScreenSpaceSurfaceReplicaRectBorderColor();
 689         fill_color = DebugColors::ScreenSpaceSurfaceReplicaRectFillColor();
 690         stroke_width = DebugColors::ScreenSpaceSurfaceReplicaRectBorderWidth();
 691         break;
 692       case SCREEN_SPACE_RECT_TYPE:
 693         stroke_color = DebugColors::ScreenSpaceLayerRectBorderColor();
 694         fill_color = DebugColors::ScreenSpaceLayerRectFillColor();
 695         stroke_width = DebugColors::ScreenSpaceLayerRectBorderWidth();
 696         break;
 697       case TOUCH_EVENT_HANDLER_RECT_TYPE:
 698         stroke_color = DebugColors::TouchEventHandlerRectBorderColor();
 699         fill_color = DebugColors::TouchEventHandlerRectFillColor();
 700         stroke_width = DebugColors::TouchEventHandlerRectBorderWidth();
 701         label_text = "touch event listener";
 702         break;
 703       case WHEEL_EVENT_HANDLER_RECT_TYPE:
 704         stroke_color = DebugColors::WheelEventHandlerRectBorderColor();
 705         fill_color = DebugColors::WheelEventHandlerRectFillColor();
 706         stroke_width = DebugColors::WheelEventHandlerRectBorderWidth();
 707         label_text = "mousewheel event listener";
 708         break;
 709       case SCROLL_EVENT_HANDLER_RECT_TYPE:
 710         stroke_color = DebugColors::ScrollEventHandlerRectBorderColor();
 711         fill_color = DebugColors::ScrollEventHandlerRectFillColor();
 712         stroke_width = DebugColors::ScrollEventHandlerRectBorderWidth();
 713         label_text = "scroll event listener";
 714         break;
 715       case NON_FAST_SCROLLABLE_RECT_TYPE:
 716         stroke_color = DebugColors::NonFastScrollableRectBorderColor();
 717         fill_color = DebugColors::NonFastScrollableRectFillColor();
 718         stroke_width = DebugColors::NonFastScrollableRectBorderWidth();
 719         label_text = "repaints on scroll";
 720         break;
 721       case ANIMATION_BOUNDS_RECT_TYPE:
 722         stroke_color = DebugColors::LayerAnimationBoundsBorderColor();
 723         fill_color = DebugColors::LayerAnimationBoundsFillColor();
 724         stroke_width = DebugColors::LayerAnimationBoundsBorderWidth();
 725         label_text = "animation bounds";
 726         break;
 727     }
 728
 729     DrawDebugRect(canvas,
 730                   &paint,
 731                   debug_rects[i],
 732                   stroke_color,
 733                   fill_color,
 734                   stroke_width,
 735                   label_text);
 736   }
 737
 738   if (new_paint_rects.size()) {
 739     paint_rects_.swap(new_paint_rects);
 740     fade_step_ = DebugColors::kFadeSteps;
 741   }
 742   if (fade_step_ > 0) {
 743     fade_step_--;
 744     for (size_t i = 0; i < paint_rects_.size(); ++i) {
 745       DrawDebugRect(canvas,
 746                     &paint,
 747                     paint_rects_[i],
 748                     DebugColors::PaintRectBorderColor(fade_step_),
 749                     DebugColors::PaintRectFillColor(fade_step_),
 750                     DebugColors::PaintRectBorderWidth(),
 751                     "");
 752     }
 753   }
 754 }
 755
 756 const char* HeadsUpDisplayLayerImpl::LayerTypeAsString() const {
 757   return "cc::HeadsUpDisplayLayerImpl";
 758 }
 759
 760 void HeadsUpDisplayLayerImpl::AsValueInto(
 761     base::trace_event::TracedValue* dict) const {
 762   LayerImpl::AsValueInto(dict);
 763   dict->SetString("layer_name", "Heads Up Display Layer");
 764 }
 765
 766 }  // namespace cc