src/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/debug/trace_event.h"
  11 #include "base/debug/trace_event_argument.h"
  12 #include "base/strings/stringprintf.h"
  13 #include "cc/debug/debug_colors.h"
  14 #include "cc/debug/frame_rate_counter.h"
  15 #include "cc/debug/paint_time_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_impl.h"
  21 #include "skia/ext/platform_canvas.h"
  22 #include "third_party/khronos/GLES2/gl2.h"
  23 #include "third_party/khronos/GLES2/gl2ext.h"
  24 #include "third_party/skia/include/core/SkBitmap.h"
  25 #include "third_party/skia/include/core/SkPaint.h"
  26 #include "third_party/skia/include/core/SkTypeface.h"
  27 #include "third_party/skia/include/effects/SkColorMatrixFilter.h"
  28 #include "ui/gfx/geometry/point.h"
  29 #include "ui/gfx/geometry/size.h"
  30
  31 namespace cc {
  32
  33 static inline SkPaint CreatePaint() {
  34   SkPaint paint;
  35 #if (SK_R32_SHIFT || SK_B32_SHIFT != 16)
  36   // The SkCanvas is in RGBA but the shader is expecting BGRA, so we need to
  37   // swizzle our colors when drawing to the SkCanvas.
  38   SkColorMatrix swizzle_matrix;
  39   for (int i = 0; i < 20; ++i)
  40     swizzle_matrix.fMat[i] = 0;
  41   swizzle_matrix.fMat[0 + 5 * 2] = 1;
  42   swizzle_matrix.fMat[1 + 5 * 1] = 1;
  43   swizzle_matrix.fMat[2 + 5 * 0] = 1;
  44   swizzle_matrix.fMat[3 + 5 * 3] = 1;
  45
  46   skia::RefPtr<SkColorMatrixFilter> filter =
  47       skia::AdoptRef(SkColorMatrixFilter::Create(swizzle_matrix));
  48   paint.setColorFilter(filter.get());
  49 #endif
  50   return paint;
  51 }
  52
  53 HeadsUpDisplayLayerImpl::Graph::Graph(double indicator_value,
  54                                       double start_upper_bound)
  55     : value(0.0),
  56       min(0.0),
  57       max(0.0),
  58       current_upper_bound(start_upper_bound),
  59       default_upper_bound(start_upper_bound),
  60       indicator(indicator_value) {}
  61
  62 double HeadsUpDisplayLayerImpl::Graph::UpdateUpperBound() {
  63   double target_upper_bound = std::max(max, default_upper_bound);
  64   current_upper_bound += (target_upper_bound - current_upper_bound) * 0.5;
  65   return current_upper_bound;
  66 }
  67
  68 HeadsUpDisplayLayerImpl::HeadsUpDisplayLayerImpl(LayerTreeImpl* tree_impl,
  69                                                  int id)
  70     : LayerImpl(tree_impl, id),
  71       typeface_(skia::AdoptRef(
  72           SkTypeface::CreateFromName("monospace", SkTypeface::kBold))),
  73       fps_graph_(60.0, 80.0),
  74       paint_time_graph_(16.0, 48.0),
  75       fade_step_(0) {}
  76
  77 HeadsUpDisplayLayerImpl::~HeadsUpDisplayLayerImpl() {}
  78
  79 scoped_ptr<LayerImpl> HeadsUpDisplayLayerImpl::CreateLayerImpl(
  80     LayerTreeImpl* tree_impl) {
  81   return HeadsUpDisplayLayerImpl::Create(tree_impl, id());
  82 }
  83
  84 void HeadsUpDisplayLayerImpl::AcquireResource(
  85     ResourceProvider* resource_provider) {
  86   for (ScopedPtrVector<ScopedResource>::iterator it = resources_.begin();
  87        it != resources_.end();
  88        ++it) {
  89     if (!resource_provider->InUseByConsumer((*it)->id())) {
  90       resources_.swap(it, resources_.end() - 1);
  91       return;
  92     }
  93   }
  94
  95   scoped_ptr<ScopedResource> resource =
  96       ScopedResource::Create(resource_provider);
  97   resource->Allocate(
  98       content_bounds(), ResourceProvider::TextureHintImmutable, RGBA_8888);
  99   resources_.push_back(resource.Pass());
 100 }
 101
 102 class ResourceSizeIsEqualTo {
 103  public:
 104   explicit ResourceSizeIsEqualTo(const gfx::Size& size_)
 105       : compare_size_(size_) {}
 106
 107   bool operator()(const ScopedResource* resource) {
 108     return resource->size() == compare_size_;
 109   }
 110
 111  private:
 112   const gfx::Size compare_size_;
 113 };
 114
 115 void HeadsUpDisplayLayerImpl::ReleaseUnmatchedSizeResources(
 116     ResourceProvider* resource_provider) {
 117   ScopedPtrVector<ScopedResource>::iterator it_erase =
 118       resources_.partition(ResourceSizeIsEqualTo(content_bounds()));
 119   resources_.erase(it_erase, resources_.end());
 120 }
 121
 122 bool HeadsUpDisplayLayerImpl::WillDraw(DrawMode draw_mode,
 123                                        ResourceProvider* resource_provider) {
 124   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
 125     return false;
 126
 127   ReleaseUnmatchedSizeResources(resource_provider);
 128   AcquireResource(resource_provider);
 129   return LayerImpl::WillDraw(draw_mode, resource_provider);
 130 }
 131
 132 void HeadsUpDisplayLayerImpl::AppendQuads(
 133     RenderPass* render_pass,
 134     const Occlusion& occlusion_in_content_space,
 135     AppendQuadsData* append_quads_data) {
 136   if (!resources_.back()->id())
 137     return;
 138
 139   SharedQuadState* shared_quad_state =
 140       render_pass->CreateAndAppendSharedQuadState();
 141   PopulateSharedQuadState(shared_quad_state);
 142
 143   gfx::Rect quad_rect(content_bounds());
 144   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
 145   gfx::Rect visible_quad_rect(quad_rect);
 146   bool premultiplied_alpha = true;
 147   gfx::PointF uv_top_left(0.f, 0.f);
 148   gfx::PointF uv_bottom_right(1.f, 1.f);
 149   const float vertex_opacity[] = { 1.f, 1.f, 1.f, 1.f };
 150   bool flipped = false;
 151   TextureDrawQuad* quad =
 152       render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
 153   quad->SetNew(shared_quad_state,
 154                quad_rect,
 155                opaque_rect,
 156                visible_quad_rect,
 157                resources_.back()->id(),
 158                premultiplied_alpha,
 159                uv_top_left,
 160                uv_bottom_right,
 161                SK_ColorTRANSPARENT,
 162                vertex_opacity,
 163                flipped);
 164 }
 165
 166 void HeadsUpDisplayLayerImpl::UpdateHudTexture(
 167     DrawMode draw_mode,
 168     ResourceProvider* resource_provider) {
 169   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE || !resources_.back()->id())
 170     return;
 171
 172   SkISize canvas_size;
 173   if (hud_canvas_)
 174     canvas_size = hud_canvas_->getDeviceSize();
 175   else
 176     canvas_size.set(0, 0);
 177
 178   if (canvas_size.width() != content_bounds().width() ||
 179       canvas_size.height() != content_bounds().height() || !hud_canvas_) {
 180     TRACE_EVENT0("cc", "ResizeHudCanvas");
 181     bool opaque = false;
 182     hud_canvas_ = make_scoped_ptr(skia::CreateBitmapCanvas(
 183         content_bounds().width(), content_bounds().height(), opaque));
 184   }
 185
 186   UpdateHudContents();
 187
 188   {
 189     TRACE_EVENT0("cc", "DrawHudContents");
 190     hud_canvas_->clear(SkColorSetARGB(0, 0, 0, 0));
 191     hud_canvas_->save();
 192     hud_canvas_->scale(contents_scale_x(), contents_scale_y());
 193
 194     DrawHudContents(hud_canvas_.get());
 195
 196     hud_canvas_->restore();
 197   }
 198
 199   TRACE_EVENT0("cc", "UploadHudTexture");
 200   SkImageInfo info;
 201   size_t row_bytes = 0;
 202   const void* pixels = hud_canvas_->peekPixels(&info, &row_bytes);
 203   DCHECK(pixels);
 204   gfx::Rect content_rect(content_bounds());
 205   DCHECK(info.colorType() == kN32_SkColorType);
 206   resource_provider->SetPixels(resources_.back()->id(),
 207                                static_cast<const uint8_t*>(pixels),
 208                                content_rect,
 209                                content_rect,
 210                                gfx::Vector2d());
 211 }
 212
 213 void HeadsUpDisplayLayerImpl::ReleaseResources() {
 214   resources_.clear();
 215 }
 216
 217 void HeadsUpDisplayLayerImpl::UpdateHudContents() {
 218   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 219
 220   // Don't update numbers every frame so text is readable.
 221   base::TimeTicks now = layer_tree_impl()->CurrentBeginFrameArgs().frame_time;
 222   if (base::TimeDelta(now - time_of_last_graph_update_).InSecondsF() > 0.25f) {
 223     time_of_last_graph_update_ = now;
 224
 225     if (debug_state.show_fps_counter) {
 226       FrameRateCounter* fps_counter = layer_tree_impl()->frame_rate_counter();
 227       fps_graph_.value = fps_counter->GetAverageFPS();
 228       fps_counter->GetMinAndMaxFPS(&fps_graph_.min, &fps_graph_.max);
 229     }
 230
 231     if (debug_state.continuous_painting) {
 232       PaintTimeCounter* paint_time_counter =
 233           layer_tree_impl()->paint_time_counter();
 234       base::TimeDelta latest, min, max;
 235
 236       if (paint_time_counter->End())
 237         latest = **paint_time_counter->End();
 238       paint_time_counter->GetMinAndMaxPaintTime(&min, &max);
 239
 240       paint_time_graph_.value = latest.InMillisecondsF();
 241       paint_time_graph_.min = min.InMillisecondsF();
 242       paint_time_graph_.max = max.InMillisecondsF();
 243     }
 244
 245     if (debug_state.ShowMemoryStats()) {
 246       MemoryHistory* memory_history = layer_tree_impl()->memory_history();
 247       if (memory_history->End())
 248         memory_entry_ = **memory_history->End();
 249       else
 250         memory_entry_ = MemoryHistory::Entry();
 251     }
 252   }
 253
 254   fps_graph_.UpdateUpperBound();
 255   paint_time_graph_.UpdateUpperBound();
 256 }
 257
 258 void HeadsUpDisplayLayerImpl::DrawHudContents(SkCanvas* canvas) {
 259   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 260
 261   if (debug_state.ShowHudRects()) {
 262     DrawDebugRects(canvas, layer_tree_impl()->debug_rect_history());
 263     if (IsAnimatingHUDContents()) {
 264       layer_tree_impl()->SetNeedsRedraw();
 265     }
 266   }
 267
 268   SkRect area = SkRect::MakeEmpty();
 269   if (debug_state.continuous_painting) {
 270     area = DrawPaintTimeDisplay(
 271         canvas, layer_tree_impl()->paint_time_counter(), 0, 0);
 272   } else if (debug_state.show_fps_counter) {
 273     // Don't show the FPS display when continuous painting is enabled, because
 274     // it would show misleading numbers.
 275     area =
 276         DrawFPSDisplay(canvas, layer_tree_impl()->frame_rate_counter(), 0, 0);
 277   }
 278
 279   if (debug_state.ShowMemoryStats())
 280     DrawMemoryDisplay(canvas, 0, area.bottom(), SkMaxScalar(area.width(), 150));
 281 }
 282
 283 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 284                                        SkPaint* paint,
 285                                        const std::string& text,
 286                                        SkPaint::Align align,
 287                                        int size,
 288                                        int x,
 289                                        int y) const {
 290   const bool anti_alias = paint->isAntiAlias();
 291   paint->setAntiAlias(true);
 292
 293   paint->setTextSize(size);
 294   paint->setTextAlign(align);
 295   paint->setTypeface(typeface_.get());
 296   canvas->drawText(text.c_str(), text.length(), x, y, *paint);
 297
 298   paint->setAntiAlias(anti_alias);
 299 }
 300
 301 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 302                                        SkPaint* paint,
 303                                        const std::string& text,
 304                                        SkPaint::Align align,
 305                                        int size,
 306                                        const SkPoint& pos) const {
 307   DrawText(canvas, paint, text, align, size, pos.x(), pos.y());
 308 }
 309
 310 void HeadsUpDisplayLayerImpl::DrawGraphBackground(SkCanvas* canvas,
 311                                                   SkPaint* paint,
 312                                                   const SkRect& bounds) const {
 313   paint->setColor(DebugColors::HUDBackgroundColor());
 314   canvas->drawRect(bounds, *paint);
 315 }
 316
 317 void HeadsUpDisplayLayerImpl::DrawGraphLines(SkCanvas* canvas,
 318                                              SkPaint* paint,
 319                                              const SkRect& bounds,
 320                                              const Graph& graph) const {
 321   // Draw top and bottom line.
 322   paint->setColor(DebugColors::HUDSeparatorLineColor());
 323   canvas->drawLine(bounds.left(),
 324                    bounds.top() - 1,
 325                    bounds.right(),
 326                    bounds.top() - 1,
 327                    *paint);
 328   canvas->drawLine(
 329       bounds.left(), bounds.bottom(), bounds.right(), bounds.bottom(), *paint);
 330
 331   // Draw indicator line (additive blend mode to increase contrast when drawn on
 332   // top of graph).
 333   paint->setColor(DebugColors::HUDIndicatorLineColor());
 334   paint->setXfermodeMode(SkXfermode::kPlus_Mode);
 335   const double indicator_top =
 336       bounds.height() * (1.0 - graph.indicator / graph.current_upper_bound) -
 337       1.0;
 338   canvas->drawLine(bounds.left(),
 339                    bounds.top() + indicator_top,
 340                    bounds.right(),
 341                    bounds.top() + indicator_top,
 342                    *paint);
 343   paint->setXfermode(nullptr);
 344 }
 345
 346 SkRect HeadsUpDisplayLayerImpl::DrawFPSDisplay(
 347     SkCanvas* canvas,
 348     const FrameRateCounter* fps_counter,
 349     int right,
 350     int top) const {
 351   const int kPadding = 4;
 352   const int kGap = 6;
 353
 354   const int kFontHeight = 15;
 355
 356   const int kGraphWidth = fps_counter->time_stamp_history_size() - 2;
 357   const int kGraphHeight = 40;
 358
 359   const int kHistogramWidth = 37;
 360
 361   int width = kGraphWidth + kHistogramWidth + 4 * kPadding;
 362   int height = kFontHeight + kGraphHeight + 4 * kPadding + 2;
 363   int left = bounds().width() - width - right;
 364   SkRect area = SkRect::MakeXYWH(left, top, width, height);
 365
 366   SkPaint paint = CreatePaint();
 367   DrawGraphBackground(canvas, &paint, area);
 368
 369   SkRect text_bounds =
 370       SkRect::MakeXYWH(left + kPadding,
 371                        top + kPadding,
 372                        kGraphWidth + kHistogramWidth + kGap + 2,
 373                        kFontHeight);
 374   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 375                                          text_bounds.bottom() + 2 * kPadding,
 376                                          kGraphWidth,
 377                                          kGraphHeight);
 378   SkRect histogram_bounds = SkRect::MakeXYWH(graph_bounds.right() + kGap,
 379                                              graph_bounds.top(),
 380                                              kHistogramWidth,
 381                                              kGraphHeight);
 382
 383   const std::string value_text =
 384       base::StringPrintf("FPS:%5.1f", fps_graph_.value);
 385   const std::string min_max_text =
 386       base::StringPrintf("%.0f-%.0f", fps_graph_.min, fps_graph_.max);
 387
 388   VLOG(1) << value_text;
 389
 390   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 391   DrawText(canvas,
 392            &paint,
 393            value_text,
 394            SkPaint::kLeft_Align,
 395            kFontHeight,
 396            text_bounds.left(),
 397            text_bounds.bottom());
 398   DrawText(canvas,
 399            &paint,
 400            min_max_text,
 401            SkPaint::kRight_Align,
 402            kFontHeight,
 403            text_bounds.right(),
 404            text_bounds.bottom());
 405
 406   DrawGraphLines(canvas, &paint, graph_bounds, fps_graph_);
 407
 408   // Collect graph and histogram data.
 409   SkPath path;
 410
 411   const int kHistogramSize = 20;
 412   double histogram[kHistogramSize] = { 1.0 };
 413   double max_bucket_value = 1.0;
 414
 415   for (FrameRateCounter::RingBufferType::Iterator it = --fps_counter->end(); it;
 416        --it) {
 417     base::TimeDelta delta = fps_counter->RecentFrameInterval(it.index() + 1);
 418
 419     // Skip this particular instantaneous frame rate if it is not likely to have
 420     // been valid.
 421     if (!fps_counter->IsBadFrameInterval(delta)) {
 422       double fps = 1.0 / delta.InSecondsF();
 423
 424       // Clamp the FPS to the range we want to plot visually.
 425       double p = fps / fps_graph_.current_upper_bound;
 426       if (p > 1.0)
 427         p = 1.0;
 428
 429       // Plot this data point.
 430       SkPoint cur =
 431           SkPoint::Make(graph_bounds.left() + it.index(),
 432                         graph_bounds.bottom() - p * graph_bounds.height());
 433       if (path.isEmpty())
 434         path.moveTo(cur);
 435       else
 436         path.lineTo(cur);
 437
 438       // Use the fps value to find the right bucket in the histogram.
 439       int bucket_index = floor(p * (kHistogramSize - 1));
 440
 441       // Add the delta time to take the time spent at that fps rate into
 442       // account.
 443       histogram[bucket_index] += delta.InSecondsF();
 444       max_bucket_value = std::max(histogram[bucket_index], max_bucket_value);
 445     }
 446   }
 447
 448   // Draw FPS histogram.
 449   paint.setColor(DebugColors::HUDSeparatorLineColor());
 450   canvas->drawLine(histogram_bounds.left() - 1,
 451                    histogram_bounds.top() - 1,
 452                    histogram_bounds.left() - 1,
 453                    histogram_bounds.bottom() + 1,
 454                    paint);
 455   canvas->drawLine(histogram_bounds.right() + 1,
 456                    histogram_bounds.top() - 1,
 457                    histogram_bounds.right() + 1,
 458                    histogram_bounds.bottom() + 1,
 459                    paint);
 460
 461   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 462   const double bar_height = histogram_bounds.height() / kHistogramSize;
 463
 464   for (int i = kHistogramSize - 1; i >= 0; --i) {
 465     if (histogram[i] > 0) {
 466       double bar_width =
 467           histogram[i] / max_bucket_value * histogram_bounds.width();
 468       canvas->drawRect(
 469           SkRect::MakeXYWH(histogram_bounds.left(),
 470                            histogram_bounds.bottom() - (i + 1) * bar_height,
 471                            bar_width,
 472                            1),
 473           paint);
 474     }
 475   }
 476
 477   // Draw FPS graph.
 478   paint.setAntiAlias(true);
 479   paint.setStyle(SkPaint::kStroke_Style);
 480   paint.setStrokeWidth(1);
 481   canvas->drawPath(path, paint);
 482
 483   return area;
 484 }
 485
 486 SkRect HeadsUpDisplayLayerImpl::DrawMemoryDisplay(SkCanvas* canvas,
 487                                                   int right,
 488                                                   int top,
 489                                                   int width) const {
 490   if (!memory_entry_.total_bytes_used)
 491     return SkRect::MakeEmpty();
 492
 493   const int kPadding = 4;
 494   const int kFontHeight = 13;
 495
 496   const int height = 3 * kFontHeight + 4 * kPadding;
 497   const int left = bounds().width() - width - right;
 498   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 499
 500   const double kMegabyte = 1024.0 * 1024.0;
 501
 502   SkPaint paint = CreatePaint();
 503   DrawGraphBackground(canvas, &paint, area);
 504
 505   SkPoint title_pos = SkPoint::Make(left + kPadding, top + kFontHeight);
 506   SkPoint stat1_pos = SkPoint::Make(left + width - kPadding - 1,
 507                                     top + kPadding + 2 * kFontHeight);
 508   SkPoint stat2_pos = SkPoint::Make(left + width - kPadding - 1,
 509                                     top + 2 * kPadding + 3 * kFontHeight);
 510
 511   paint.setColor(DebugColors::MemoryDisplayTextColor());
 512   DrawText(canvas,
 513            &paint,
 514            "GPU memory",
 515            SkPaint::kLeft_Align,
 516            kFontHeight,
 517            title_pos);
 518
 519   std::string text = base::StringPrintf(
 520       "%6.1f MB used", memory_entry_.total_bytes_used / kMegabyte);
 521   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat1_pos);
 522
 523   if (!memory_entry_.had_enough_memory)
 524     paint.setColor(SK_ColorRED);
 525   text = base::StringPrintf("%6.1f MB max ",
 526                             memory_entry_.total_budget_in_bytes / kMegabyte);
 527   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat2_pos);
 528
 529   return area;
 530 }
 531
 532 SkRect HeadsUpDisplayLayerImpl::DrawPaintTimeDisplay(
 533     SkCanvas* canvas,
 534     const PaintTimeCounter* paint_time_counter,
 535     int right,
 536     int top) const {
 537   const int kPadding = 4;
 538   const int kFontHeight = 15;
 539
 540   const int kGraphWidth = paint_time_counter->HistorySize();
 541   const int kGraphHeight = 40;
 542
 543   const int width = kGraphWidth + 2 * kPadding;
 544   const int height =
 545       kFontHeight + kGraphHeight + 4 * kPadding + 2 + kFontHeight + kPadding;
 546   const int left = bounds().width() - width - right;
 547
 548   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 549
 550   SkPaint paint = CreatePaint();
 551   DrawGraphBackground(canvas, &paint, area);
 552
 553   SkRect text_bounds = SkRect::MakeXYWH(
 554       left + kPadding, top + kPadding, kGraphWidth, kFontHeight);
 555   SkRect text_bounds2 = SkRect::MakeXYWH(left + kPadding,
 556                                          text_bounds.bottom() + kPadding,
 557                                          kGraphWidth,
 558                                          kFontHeight);
 559   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 560                                          text_bounds2.bottom() + 2 * kPadding,
 561                                          kGraphWidth,
 562                                          kGraphHeight);
 563
 564   const std::string value_text =
 565       base::StringPrintf("%.1f", paint_time_graph_.value);
 566   const std::string min_max_text = base::StringPrintf(
 567       "%.1f-%.1f", paint_time_graph_.min, paint_time_graph_.max);
 568
 569   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 570   DrawText(canvas, &paint, "Compositor frame time (ms)", SkPaint::kLeft_Align,
 571            kFontHeight, text_bounds.left(), text_bounds.bottom());
 572   DrawText(canvas,
 573            &paint,
 574            value_text,
 575            SkPaint::kLeft_Align,
 576            kFontHeight,
 577            text_bounds2.left(),
 578            text_bounds2.bottom());
 579   DrawText(canvas,
 580            &paint,
 581            min_max_text,
 582            SkPaint::kRight_Align,
 583            kFontHeight,
 584            text_bounds2.right(),
 585            text_bounds2.bottom());
 586
 587   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 588   for (PaintTimeCounter::RingBufferType::Iterator it =
 589            paint_time_counter->End();
 590        it;
 591        --it) {
 592     double pt = it->InMillisecondsF();
 593
 594     if (pt == 0.0)
 595       continue;
 596
 597     double p = pt / paint_time_graph_.current_upper_bound;
 598     if (p > 1.0)
 599       p = 1.0;
 600
 601     canvas->drawRect(
 602         SkRect::MakeXYWH(graph_bounds.left() + it.index(),
 603                          graph_bounds.bottom() - p * graph_bounds.height(),
 604                          1,
 605                          p * graph_bounds.height()),
 606         paint);
 607   }
 608
 609   DrawGraphLines(canvas, &paint, graph_bounds, paint_time_graph_);
 610
 611   return area;
 612 }
 613
 614 void HeadsUpDisplayLayerImpl::DrawDebugRect(
 615     SkCanvas* canvas,
 616     SkPaint* paint,
 617     const DebugRect& rect,
 618     SkColor stroke_color,
 619     SkColor fill_color,
 620     float stroke_width,
 621     const std::string& label_text) const {
 622   gfx::Rect debug_layer_rect = gfx::ScaleToEnclosingRect(
 623       rect.rect, 1.0 / contents_scale_x(), 1.0 / contents_scale_y());
 624   SkIRect sk_rect = RectToSkIRect(debug_layer_rect);
 625   paint->setColor(fill_color);
 626   paint->setStyle(SkPaint::kFill_Style);
 627   canvas->drawIRect(sk_rect, *paint);
 628
 629   paint->setColor(stroke_color);
 630   paint->setStyle(SkPaint::kStroke_Style);
 631   paint->setStrokeWidth(SkFloatToScalar(stroke_width));
 632   canvas->drawIRect(sk_rect, *paint);
 633
 634   if (label_text.length()) {
 635     const int kFontHeight = 12;
 636     const int kPadding = 3;
 637
 638     // The debug_layer_rect may be huge, and converting to a floating point may
 639     // be lossy, so intersect with the HUD layer bounds first to prevent that.
 640     gfx::Rect clip_rect = debug_layer_rect;
 641     clip_rect.Intersect(gfx::Rect(content_bounds()));
 642     SkRect sk_clip_rect = RectToSkRect(clip_rect);
 643
 644     canvas->save();
 645     canvas->clipRect(sk_clip_rect);
 646     canvas->translate(sk_clip_rect.x(), sk_clip_rect.y());
 647
 648     SkPaint label_paint = CreatePaint();
 649     label_paint.setTextSize(kFontHeight);
 650     label_paint.setTypeface(typeface_.get());
 651     label_paint.setColor(stroke_color);
 652
 653     const SkScalar label_text_width =
 654         label_paint.measureText(label_text.c_str(), label_text.length());
 655     canvas->drawRect(SkRect::MakeWH(label_text_width + 2 * kPadding,
 656                                     kFontHeight + 2 * kPadding),
 657                      label_paint);
 658
 659     label_paint.setAntiAlias(true);
 660     label_paint.setColor(SkColorSetARGB(255, 50, 50, 50));
 661     canvas->drawText(label_text.c_str(),
 662                      label_text.length(),
 663                      kPadding,
 664                      kFontHeight * 0.8f + kPadding,
 665                      label_paint);
 666
 667     canvas->restore();
 668   }
 669 }
 670
 671 void HeadsUpDisplayLayerImpl::DrawDebugRects(
 672     SkCanvas* canvas,
 673     DebugRectHistory* debug_rect_history) {
 674   SkPaint paint = CreatePaint();
 675
 676   const std::vector<DebugRect>& debug_rects = debug_rect_history->debug_rects();
 677   std::vector<DebugRect> new_paint_rects;
 678
 679   for (size_t i = 0; i < debug_rects.size(); ++i) {
 680     SkColor stroke_color = 0;
 681     SkColor fill_color = 0;
 682     float stroke_width = 0.f;
 683     std::string label_text;
 684
 685     switch (debug_rects[i].type) {
 686       case PAINT_RECT_TYPE:
 687         new_paint_rects.push_back(debug_rects[i]);
 688         continue;
 689       case PROPERTY_CHANGED_RECT_TYPE:
 690         stroke_color = DebugColors::PropertyChangedRectBorderColor();
 691         fill_color = DebugColors::PropertyChangedRectFillColor();
 692         stroke_width = DebugColors::PropertyChangedRectBorderWidth();
 693         break;
 694       case SURFACE_DAMAGE_RECT_TYPE:
 695         stroke_color = DebugColors::SurfaceDamageRectBorderColor();
 696         fill_color = DebugColors::SurfaceDamageRectFillColor();
 697         stroke_width = DebugColors::SurfaceDamageRectBorderWidth();
 698         break;
 699       case REPLICA_SCREEN_SPACE_RECT_TYPE:
 700         stroke_color = DebugColors::ScreenSpaceSurfaceReplicaRectBorderColor();
 701         fill_color = DebugColors::ScreenSpaceSurfaceReplicaRectFillColor();
 702         stroke_width = DebugColors::ScreenSpaceSurfaceReplicaRectBorderWidth();
 703         break;
 704       case SCREEN_SPACE_RECT_TYPE:
 705         stroke_color = DebugColors::ScreenSpaceLayerRectBorderColor();
 706         fill_color = DebugColors::ScreenSpaceLayerRectFillColor();
 707         stroke_width = DebugColors::ScreenSpaceLayerRectBorderWidth();
 708         break;
 709       case OCCLUDING_RECT_TYPE:
 710         stroke_color = DebugColors::OccludingRectBorderColor();
 711         fill_color = DebugColors::OccludingRectFillColor();
 712         stroke_width = DebugColors::OccludingRectBorderWidth();
 713         break;
 714       case NONOCCLUDING_RECT_TYPE:
 715         stroke_color = DebugColors::NonOccludingRectBorderColor();
 716         fill_color = DebugColors::NonOccludingRectFillColor();
 717         stroke_width = DebugColors::NonOccludingRectBorderWidth();
 718         break;
 719       case TOUCH_EVENT_HANDLER_RECT_TYPE:
 720         stroke_color = DebugColors::TouchEventHandlerRectBorderColor();
 721         fill_color = DebugColors::TouchEventHandlerRectFillColor();
 722         stroke_width = DebugColors::TouchEventHandlerRectBorderWidth();
 723         label_text = "touch event listener";
 724         break;
 725       case WHEEL_EVENT_HANDLER_RECT_TYPE:
 726         stroke_color = DebugColors::WheelEventHandlerRectBorderColor();
 727         fill_color = DebugColors::WheelEventHandlerRectFillColor();
 728         stroke_width = DebugColors::WheelEventHandlerRectBorderWidth();
 729         label_text = "mousewheel event listener";
 730         break;
 731       case SCROLL_EVENT_HANDLER_RECT_TYPE:
 732         stroke_color = DebugColors::ScrollEventHandlerRectBorderColor();
 733         fill_color = DebugColors::ScrollEventHandlerRectFillColor();
 734         stroke_width = DebugColors::ScrollEventHandlerRectBorderWidth();
 735         label_text = "scroll event listener";
 736         break;
 737       case NON_FAST_SCROLLABLE_RECT_TYPE:
 738         stroke_color = DebugColors::NonFastScrollableRectBorderColor();
 739         fill_color = DebugColors::NonFastScrollableRectFillColor();
 740         stroke_width = DebugColors::NonFastScrollableRectBorderWidth();
 741         label_text = "repaints on scroll";
 742         break;
 743       case ANIMATION_BOUNDS_RECT_TYPE:
 744         stroke_color = DebugColors::LayerAnimationBoundsBorderColor();
 745         fill_color = DebugColors::LayerAnimationBoundsFillColor();
 746         stroke_width = DebugColors::LayerAnimationBoundsBorderWidth();
 747         label_text = "animation bounds";
 748         break;
 749     }
 750
 751     DrawDebugRect(canvas,
 752                   &paint,
 753                   debug_rects[i],
 754                   stroke_color,
 755                   fill_color,
 756                   stroke_width,
 757                   label_text);
 758   }
 759
 760   if (new_paint_rects.size()) {
 761     paint_rects_.swap(new_paint_rects);
 762     fade_step_ = DebugColors::kFadeSteps;
 763   }
 764   if (fade_step_ > 0) {
 765     fade_step_--;
 766     for (size_t i = 0; i < paint_rects_.size(); ++i) {
 767       DrawDebugRect(canvas,
 768                     &paint,
 769                     paint_rects_[i],
 770                     DebugColors::PaintRectBorderColor(fade_step_),
 771                     DebugColors::PaintRectFillColor(fade_step_),
 772                     DebugColors::PaintRectBorderWidth(),
 773                     "");
 774     }
 775   }
 776 }
 777
 778 const char* HeadsUpDisplayLayerImpl::LayerTypeAsString() const {
 779   return "cc::HeadsUpDisplayLayerImpl";
 780 }
 781
 782 void HeadsUpDisplayLayerImpl::AsValueInto(
 783     base::debug::TracedValue* dict) const {
 784   LayerImpl::AsValueInto(dict);
 785   dict->SetString("layer_name", "Heads Up Display Layer");
 786 }
 787
 788 }  // namespace cc