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/strings/stringprintf.h"
  11 #include "cc/debug/debug_colors.h"
  12 #include "cc/debug/debug_rect_history.h"
  13 #include "cc/debug/frame_rate_counter.h"
  14 #include "cc/debug/paint_time_counter.h"
  15 #include "cc/debug/traced_value.h"
  16 #include "cc/layers/quad_sink.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/point.h"
  29 #include "ui/gfx/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(new SkColorMatrixFilter(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
  76 HeadsUpDisplayLayerImpl::~HeadsUpDisplayLayerImpl() {}
  77
  78 scoped_ptr<LayerImpl> HeadsUpDisplayLayerImpl::CreateLayerImpl(
  79     LayerTreeImpl* tree_impl) {
  80   return HeadsUpDisplayLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
  81 }
  82
  83 bool HeadsUpDisplayLayerImpl::WillDraw(DrawMode draw_mode,
  84                                        ResourceProvider* resource_provider) {
  85   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
  86     return false;
  87
  88   if (!hud_resource_)
  89     hud_resource_ = ScopedResource::create(resource_provider);
  90
  91   // TODO(danakj): The HUD could swap between two textures instead of creating a
  92   // texture every frame in ubercompositor.
  93   if (hud_resource_->size() != content_bounds() ||
  94       (hud_resource_->id() &&
  95        resource_provider->InUseByConsumer(hud_resource_->id()))) {
  96     hud_resource_->Free();
  97   }
  98
  99   if (!hud_resource_->id()) {
 100     hud_resource_->Allocate(content_bounds(),
 101                             ResourceProvider::TextureUsageAny,
 102                             RGBA_8888);
 103   }
 104
 105   return LayerImpl::WillDraw(draw_mode, resource_provider);
 106 }
 107
 108 void HeadsUpDisplayLayerImpl::AppendQuads(QuadSink* quad_sink,
 109                                           AppendQuadsData* append_quads_data) {
 110   if (!hud_resource_->id())
 111     return;
 112
 113   SharedQuadState* shared_quad_state =
 114       quad_sink->UseSharedQuadState(CreateSharedQuadState());
 115
 116   gfx::Rect quad_rect(content_bounds());
 117   gfx::Rect opaque_rect(contents_opaque() ? quad_rect : gfx::Rect());
 118   bool premultiplied_alpha = true;
 119   gfx::PointF uv_top_left(0.f, 0.f);
 120   gfx::PointF uv_bottom_right(1.f, 1.f);
 121   const float vertex_opacity[] = { 1.f, 1.f, 1.f, 1.f };
 122   bool flipped = false;
 123   scoped_ptr<TextureDrawQuad> quad = TextureDrawQuad::Create();
 124   quad->SetNew(shared_quad_state,
 125                quad_rect,
 126                opaque_rect,
 127                hud_resource_->id(),
 128                premultiplied_alpha,
 129                uv_top_left,
 130                uv_bottom_right,
 131                SK_ColorTRANSPARENT,
 132                vertex_opacity,
 133                flipped);
 134   quad_sink->Append(quad.PassAs<DrawQuad>(), append_quads_data);
 135 }
 136
 137 void HeadsUpDisplayLayerImpl::UpdateHudTexture(
 138     DrawMode draw_mode,
 139     ResourceProvider* resource_provider) {
 140   if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE || !hud_resource_->id())
 141     return;
 142
 143   SkISize canvas_size;
 144   if (hud_canvas_)
 145     canvas_size = hud_canvas_->getDeviceSize();
 146   else
 147     canvas_size.set(0, 0);
 148
 149   if (canvas_size.width() != content_bounds().width() ||
 150       canvas_size.width() != content_bounds().height() || !hud_canvas_) {
 151     TRACE_EVENT0("cc", "ResizeHudCanvas");
 152     bool opaque = false;
 153     hud_canvas_ = make_scoped_ptr(skia::CreateBitmapCanvas(
 154         content_bounds().width(), content_bounds().height(), opaque));
 155   }
 156
 157   UpdateHudContents();
 158
 159   {
 160     TRACE_EVENT0("cc", "DrawHudContents");
 161     hud_canvas_->clear(SkColorSetARGB(0, 0, 0, 0));
 162     hud_canvas_->save();
 163     hud_canvas_->scale(contents_scale_x(), contents_scale_y());
 164
 165     DrawHudContents(hud_canvas_.get());
 166
 167     hud_canvas_->restore();
 168   }
 169
 170   TRACE_EVENT0("cc", "UploadHudTexture");
 171   const SkBitmap* bitmap = &hud_canvas_->getDevice()->accessBitmap(false);
 172   SkAutoLockPixels locker(*bitmap);
 173
 174   gfx::Rect content_rect(content_bounds());
 175   DCHECK(bitmap->config() == SkBitmap::kARGB_8888_Config);
 176   resource_provider->SetPixels(hud_resource_->id(),
 177                                static_cast<const uint8_t*>(bitmap->getPixels()),
 178                                content_rect,
 179                                content_rect,
 180                                gfx::Vector2d());
 181 }
 182
 183 void HeadsUpDisplayLayerImpl::DidLoseOutputSurface() { hud_resource_.reset(); }
 184
 185 bool HeadsUpDisplayLayerImpl::LayerIsAlwaysDamaged() const { return true; }
 186
 187 void HeadsUpDisplayLayerImpl::UpdateHudContents() {
 188   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 189
 190   // Don't update numbers every frame so text is readable.
 191   base::TimeTicks now = layer_tree_impl()->CurrentFrameTimeTicks();
 192   if (base::TimeDelta(now - time_of_last_graph_update_).InSecondsF() > 0.25f) {
 193     time_of_last_graph_update_ = now;
 194
 195     if (debug_state.show_fps_counter) {
 196       FrameRateCounter* fps_counter = layer_tree_impl()->frame_rate_counter();
 197       fps_graph_.value = fps_counter->GetAverageFPS();
 198       fps_counter->GetMinAndMaxFPS(&fps_graph_.min, &fps_graph_.max);
 199     }
 200
 201     if (debug_state.continuous_painting) {
 202       PaintTimeCounter* paint_time_counter =
 203           layer_tree_impl()->paint_time_counter();
 204       base::TimeDelta latest, min, max;
 205
 206       if (paint_time_counter->End())
 207         latest = **paint_time_counter->End();
 208       paint_time_counter->GetMinAndMaxPaintTime(&min, &max);
 209
 210       paint_time_graph_.value = latest.InMillisecondsF();
 211       paint_time_graph_.min = min.InMillisecondsF();
 212       paint_time_graph_.max = max.InMillisecondsF();
 213     }
 214
 215     if (debug_state.ShowMemoryStats()) {
 216       MemoryHistory* memory_history = layer_tree_impl()->memory_history();
 217       if (memory_history->End())
 218         memory_entry_ = **memory_history->End();
 219       else
 220         memory_entry_ = MemoryHistory::Entry();
 221     }
 222   }
 223
 224   fps_graph_.UpdateUpperBound();
 225   paint_time_graph_.UpdateUpperBound();
 226 }
 227
 228 void HeadsUpDisplayLayerImpl::DrawHudContents(SkCanvas* canvas) const {
 229   const LayerTreeDebugState& debug_state = layer_tree_impl()->debug_state();
 230
 231   if (debug_state.ShowHudRects())
 232     DrawDebugRects(canvas, layer_tree_impl()->debug_rect_history());
 233
 234   SkRect area = SkRect::MakeEmpty();
 235   if (debug_state.continuous_painting) {
 236     area = DrawPaintTimeDisplay(
 237         canvas, layer_tree_impl()->paint_time_counter(), 0, 0);
 238   } else if (debug_state.show_fps_counter) {
 239     // Don't show the FPS display when continuous painting is enabled, because
 240     // it would show misleading numbers.
 241     area =
 242         DrawFPSDisplay(canvas, layer_tree_impl()->frame_rate_counter(), 0, 0);
 243   }
 244
 245   if (debug_state.ShowMemoryStats())
 246     DrawMemoryDisplay(canvas, 0, area.bottom(), SkMaxScalar(area.width(), 150));
 247 }
 248
 249 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 250                                        SkPaint* paint,
 251                                        const std::string& text,
 252                                        SkPaint::Align align,
 253                                        int size,
 254                                        int x,
 255                                        int y) const {
 256   const bool anti_alias = paint->isAntiAlias();
 257   paint->setAntiAlias(true);
 258
 259   paint->setTextSize(size);
 260   paint->setTextAlign(align);
 261   paint->setTypeface(typeface_.get());
 262   canvas->drawText(text.c_str(), text.length(), x, y, *paint);
 263
 264   paint->setAntiAlias(anti_alias);
 265 }
 266
 267 void HeadsUpDisplayLayerImpl::DrawText(SkCanvas* canvas,
 268                                        SkPaint* paint,
 269                                        const std::string& text,
 270                                        SkPaint::Align align,
 271                                        int size,
 272                                        const SkPoint& pos) const {
 273   DrawText(canvas, paint, text, align, size, pos.x(), pos.y());
 274 }
 275
 276 void HeadsUpDisplayLayerImpl::DrawGraphBackground(SkCanvas* canvas,
 277                                                   SkPaint* paint,
 278                                                   const SkRect& bounds) const {
 279   paint->setColor(DebugColors::HUDBackgroundColor());
 280   canvas->drawRect(bounds, *paint);
 281 }
 282
 283 void HeadsUpDisplayLayerImpl::DrawGraphLines(SkCanvas* canvas,
 284                                              SkPaint* paint,
 285                                              const SkRect& bounds,
 286                                              const Graph& graph) const {
 287   // Draw top and bottom line.
 288   paint->setColor(DebugColors::HUDSeparatorLineColor());
 289   canvas->drawLine(bounds.left(),
 290                    bounds.top() - 1,
 291                    bounds.right(),
 292                    bounds.top() - 1,
 293                    *paint);
 294   canvas->drawLine(
 295       bounds.left(), bounds.bottom(), bounds.right(), bounds.bottom(), *paint);
 296
 297   // Draw indicator line (additive blend mode to increase contrast when drawn on
 298   // top of graph).
 299   paint->setColor(DebugColors::HUDIndicatorLineColor());
 300   paint->setXfermodeMode(SkXfermode::kPlus_Mode);
 301   const double indicator_top =
 302       bounds.height() * (1.0 - graph.indicator / graph.current_upper_bound) -
 303       1.0;
 304   canvas->drawLine(bounds.left(),
 305                    bounds.top() + indicator_top,
 306                    bounds.right(),
 307                    bounds.top() + indicator_top,
 308                    *paint);
 309   paint->setXfermode(NULL);
 310 }
 311
 312 SkRect HeadsUpDisplayLayerImpl::DrawFPSDisplay(
 313     SkCanvas* canvas,
 314     const FrameRateCounter* fps_counter,
 315     int right,
 316     int top) const {
 317   const int kPadding = 4;
 318   const int kGap = 6;
 319
 320   const int kFontHeight = 15;
 321
 322   const int kGraphWidth = fps_counter->time_stamp_history_size() - 2;
 323   const int kGraphHeight = 40;
 324
 325   const int kHistogramWidth = 37;
 326
 327   int width = kGraphWidth + kHistogramWidth + 4 * kPadding;
 328   int height = kFontHeight + kGraphHeight + 4 * kPadding + 2;
 329   int left = bounds().width() - width - right;
 330   SkRect area = SkRect::MakeXYWH(left, top, width, height);
 331
 332   SkPaint paint = CreatePaint();
 333   DrawGraphBackground(canvas, &paint, area);
 334
 335   SkRect text_bounds =
 336       SkRect::MakeXYWH(left + kPadding,
 337                        top + kPadding,
 338                        kGraphWidth + kHistogramWidth + kGap + 2,
 339                        kFontHeight);
 340   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 341                                          text_bounds.bottom() + 2 * kPadding,
 342                                          kGraphWidth,
 343                                          kGraphHeight);
 344   SkRect histogram_bounds = SkRect::MakeXYWH(graph_bounds.right() + kGap,
 345                                              graph_bounds.top(),
 346                                              kHistogramWidth,
 347                                              kGraphHeight);
 348
 349   const std::string value_text =
 350       base::StringPrintf("FPS:%5.1f", fps_graph_.value);
 351   const std::string min_max_text =
 352       base::StringPrintf("%.0f-%.0f", fps_graph_.min, fps_graph_.max);
 353
 354   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 355   DrawText(canvas,
 356            &paint,
 357            value_text,
 358            SkPaint::kLeft_Align,
 359            kFontHeight,
 360            text_bounds.left(),
 361            text_bounds.bottom());
 362   DrawText(canvas,
 363            &paint,
 364            min_max_text,
 365            SkPaint::kRight_Align,
 366            kFontHeight,
 367            text_bounds.right(),
 368            text_bounds.bottom());
 369
 370   DrawGraphLines(canvas, &paint, graph_bounds, fps_graph_);
 371
 372   // Collect graph and histogram data.
 373   SkPath path;
 374
 375   const int kHistogramSize = 20;
 376   double histogram[kHistogramSize] = { 1.0 };
 377   double max_bucket_value = 1.0;
 378
 379   for (FrameRateCounter::RingBufferType::Iterator it = --fps_counter->end(); it;
 380        --it) {
 381     base::TimeDelta delta = fps_counter->RecentFrameInterval(it.index() + 1);
 382
 383     // Skip this particular instantaneous frame rate if it is not likely to have
 384     // been valid.
 385     if (!fps_counter->IsBadFrameInterval(delta)) {
 386       double fps = 1.0 / delta.InSecondsF();
 387
 388       // Clamp the FPS to the range we want to plot visually.
 389       double p = fps / fps_graph_.current_upper_bound;
 390       if (p > 1.0)
 391         p = 1.0;
 392
 393       // Plot this data point.
 394       SkPoint cur =
 395           SkPoint::Make(graph_bounds.left() + it.index(),
 396                         graph_bounds.bottom() - p * graph_bounds.height());
 397       if (path.isEmpty())
 398         path.moveTo(cur);
 399       else
 400         path.lineTo(cur);
 401
 402       // Use the fps value to find the right bucket in the histogram.
 403       int bucket_index = floor(p * (kHistogramSize - 1));
 404
 405       // Add the delta time to take the time spent at that fps rate into
 406       // account.
 407       histogram[bucket_index] += delta.InSecondsF();
 408       max_bucket_value = std::max(histogram[bucket_index], max_bucket_value);
 409     }
 410   }
 411
 412   // Draw FPS histogram.
 413   paint.setColor(DebugColors::HUDSeparatorLineColor());
 414   canvas->drawLine(histogram_bounds.left() - 1,
 415                    histogram_bounds.top() - 1,
 416                    histogram_bounds.left() - 1,
 417                    histogram_bounds.bottom() + 1,
 418                    paint);
 419   canvas->drawLine(histogram_bounds.right() + 1,
 420                    histogram_bounds.top() - 1,
 421                    histogram_bounds.right() + 1,
 422                    histogram_bounds.bottom() + 1,
 423                    paint);
 424
 425   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 426   const double bar_height = histogram_bounds.height() / kHistogramSize;
 427
 428   for (int i = kHistogramSize - 1; i >= 0; --i) {
 429     if (histogram[i] > 0) {
 430       double bar_width =
 431           histogram[i] / max_bucket_value * histogram_bounds.width();
 432       canvas->drawRect(
 433           SkRect::MakeXYWH(histogram_bounds.left(),
 434                            histogram_bounds.bottom() - (i + 1) * bar_height,
 435                            bar_width,
 436                            1),
 437           paint);
 438     }
 439   }
 440
 441   // Draw FPS graph.
 442   paint.setAntiAlias(true);
 443   paint.setStyle(SkPaint::kStroke_Style);
 444   paint.setStrokeWidth(1);
 445   canvas->drawPath(path, paint);
 446
 447   return area;
 448 }
 449
 450 SkRect HeadsUpDisplayLayerImpl::DrawMemoryDisplay(SkCanvas* canvas,
 451                                                   int right,
 452                                                   int top,
 453                                                   int width) const {
 454   if (!memory_entry_.bytes_total())
 455     return SkRect::MakeEmpty();
 456
 457   const int kPadding = 4;
 458   const int kFontHeight = 13;
 459
 460   const int height = 3 * kFontHeight + 4 * kPadding;
 461   const int left = bounds().width() - width - right;
 462   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 463
 464   const double megabyte = 1024.0 * 1024.0;
 465
 466   SkPaint paint = CreatePaint();
 467   DrawGraphBackground(canvas, &paint, area);
 468
 469   SkPoint title_pos = SkPoint::Make(left + kPadding, top + kFontHeight);
 470   SkPoint stat1_pos = SkPoint::Make(left + width - kPadding - 1,
 471                                     top + kPadding + 2 * kFontHeight);
 472   SkPoint stat2_pos = SkPoint::Make(left + width - kPadding - 1,
 473                                     top + 2 * kPadding + 3 * kFontHeight);
 474
 475   paint.setColor(DebugColors::MemoryDisplayTextColor());
 476   DrawText(canvas,
 477            &paint,
 478            "GPU memory",
 479            SkPaint::kLeft_Align,
 480            kFontHeight,
 481            title_pos);
 482
 483   std::string text =
 484       base::StringPrintf("%6.1f MB used",
 485                          (memory_entry_.bytes_unreleasable +
 486                           memory_entry_.bytes_allocated) / megabyte);
 487   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat1_pos);
 488
 489   if (memory_entry_.bytes_over) {
 490     paint.setColor(SK_ColorRED);
 491     text = base::StringPrintf("%6.1f MB over",
 492                               memory_entry_.bytes_over / megabyte);
 493   } else {
 494     text = base::StringPrintf("%6.1f MB max ",
 495                               memory_entry_.total_budget_in_bytes / megabyte);
 496   }
 497   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat2_pos);
 498
 499   return area;
 500 }
 501
 502 SkRect HeadsUpDisplayLayerImpl::DrawPaintTimeDisplay(
 503     SkCanvas* canvas,
 504     const PaintTimeCounter* paint_time_counter,
 505     int right,
 506     int top) const {
 507   const int kPadding = 4;
 508   const int kFontHeight = 15;
 509
 510   const int kGraphWidth = paint_time_counter->HistorySize();
 511   const int kGraphHeight = 40;
 512
 513   const int width = kGraphWidth + 2 * kPadding;
 514   const int height =
 515       kFontHeight + kGraphHeight + 4 * kPadding + 2 + kFontHeight + kPadding;
 516   const int left = bounds().width() - width - right;
 517
 518   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 519
 520   SkPaint paint = CreatePaint();
 521   DrawGraphBackground(canvas, &paint, area);
 522
 523   SkRect text_bounds = SkRect::MakeXYWH(
 524       left + kPadding, top + kPadding, kGraphWidth, kFontHeight);
 525   SkRect text_bounds2 = SkRect::MakeXYWH(left + kPadding,
 526                                          text_bounds.bottom() + kPadding,
 527                                          kGraphWidth,
 528                                          kFontHeight);
 529   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 530                                          text_bounds2.bottom() + 2 * kPadding,
 531                                          kGraphWidth,
 532                                          kGraphHeight);
 533
 534   const std::string value_text =
 535       base::StringPrintf("%.1f", paint_time_graph_.value);
 536   const std::string min_max_text = base::StringPrintf(
 537       "%.1f-%.1f", paint_time_graph_.min, paint_time_graph_.max);
 538
 539   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 540   DrawText(canvas,
 541            &paint,
 542            "Page paint time (ms)",
 543            SkPaint::kLeft_Align,
 544            kFontHeight,
 545            text_bounds.left(),
 546            text_bounds.bottom());
 547   DrawText(canvas,
 548            &paint,
 549            value_text,
 550            SkPaint::kLeft_Align,
 551            kFontHeight,
 552            text_bounds2.left(),
 553            text_bounds2.bottom());
 554   DrawText(canvas,
 555            &paint,
 556            min_max_text,
 557            SkPaint::kRight_Align,
 558            kFontHeight,
 559            text_bounds2.right(),
 560            text_bounds2.bottom());
 561
 562   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 563   for (PaintTimeCounter::RingBufferType::Iterator it =
 564            paint_time_counter->End();
 565        it;
 566        --it) {
 567     double pt = it->InMillisecondsF();
 568
 569     if (pt == 0.0)
 570       continue;
 571
 572     double p = pt / paint_time_graph_.current_upper_bound;
 573     if (p > 1.0)
 574       p = 1.0;
 575
 576     canvas->drawRect(
 577         SkRect::MakeXYWH(graph_bounds.left() + it.index(),
 578                          graph_bounds.bottom() - p * graph_bounds.height(),
 579                          1,
 580                          p * graph_bounds.height()),
 581         paint);
 582   }
 583
 584   DrawGraphLines(canvas, &paint, graph_bounds, paint_time_graph_);
 585
 586   return area;
 587 }
 588
 589 void HeadsUpDisplayLayerImpl::DrawDebugRects(
 590     SkCanvas* canvas,
 591     DebugRectHistory* debug_rect_history) const {
 592   const std::vector<DebugRect>& debug_rects = debug_rect_history->debug_rects();
 593   SkPaint paint = CreatePaint();
 594
 595   for (size_t i = 0; i < debug_rects.size(); ++i) {
 596     SkColor stroke_color = 0;
 597     SkColor fill_color = 0;
 598     float stroke_width = 0.f;
 599     std::string label_text;
 600
 601     switch (debug_rects[i].type) {
 602       case PAINT_RECT_TYPE:
 603         stroke_color = DebugColors::PaintRectBorderColor();
 604         fill_color = DebugColors::PaintRectFillColor();
 605         stroke_width = DebugColors::PaintRectBorderWidth();
 606         break;
 607       case PROPERTY_CHANGED_RECT_TYPE:
 608         stroke_color = DebugColors::PropertyChangedRectBorderColor();
 609         fill_color = DebugColors::PropertyChangedRectFillColor();
 610         stroke_width = DebugColors::PropertyChangedRectBorderWidth();
 611         break;
 612       case SURFACE_DAMAGE_RECT_TYPE:
 613         stroke_color = DebugColors::SurfaceDamageRectBorderColor();
 614         fill_color = DebugColors::SurfaceDamageRectFillColor();
 615         stroke_width = DebugColors::SurfaceDamageRectBorderWidth();
 616         break;
 617       case REPLICA_SCREEN_SPACE_RECT_TYPE:
 618         stroke_color = DebugColors::ScreenSpaceSurfaceReplicaRectBorderColor();
 619         fill_color = DebugColors::ScreenSpaceSurfaceReplicaRectFillColor();
 620         stroke_width = DebugColors::ScreenSpaceSurfaceReplicaRectBorderWidth();
 621         break;
 622       case SCREEN_SPACE_RECT_TYPE:
 623         stroke_color = DebugColors::ScreenSpaceLayerRectBorderColor();
 624         fill_color = DebugColors::ScreenSpaceLayerRectFillColor();
 625         stroke_width = DebugColors::ScreenSpaceLayerRectBorderWidth();
 626         break;
 627       case OCCLUDING_RECT_TYPE:
 628         stroke_color = DebugColors::OccludingRectBorderColor();
 629         fill_color = DebugColors::OccludingRectFillColor();
 630         stroke_width = DebugColors::OccludingRectBorderWidth();
 631         break;
 632       case NONOCCLUDING_RECT_TYPE:
 633         stroke_color = DebugColors::NonOccludingRectBorderColor();
 634         fill_color = DebugColors::NonOccludingRectFillColor();
 635         stroke_width = DebugColors::NonOccludingRectBorderWidth();
 636         break;
 637       case TOUCH_EVENT_HANDLER_RECT_TYPE:
 638         stroke_color = DebugColors::TouchEventHandlerRectBorderColor();
 639         fill_color = DebugColors::TouchEventHandlerRectFillColor();
 640         stroke_width = DebugColors::TouchEventHandlerRectBorderWidth();
 641         label_text = "touch event listener";
 642         break;
 643       case WHEEL_EVENT_HANDLER_RECT_TYPE:
 644         stroke_color = DebugColors::WheelEventHandlerRectBorderColor();
 645         fill_color = DebugColors::WheelEventHandlerRectFillColor();
 646         stroke_width = DebugColors::WheelEventHandlerRectBorderWidth();
 647         label_text = "mousewheel event listener";
 648         break;
 649       case NON_FAST_SCROLLABLE_RECT_TYPE:
 650         stroke_color = DebugColors::NonFastScrollableRectBorderColor();
 651         fill_color = DebugColors::NonFastScrollableRectFillColor();
 652         stroke_width = DebugColors::NonFastScrollableRectBorderWidth();
 653         label_text = "repaints on scroll";
 654         break;
 655     }
 656
 657     gfx::RectF debug_layer_rect = gfx::ScaleRect(debug_rects[i].rect,
 658                                                  1.0 / contents_scale_x(),
 659                                                  1.0 / contents_scale_y());
 660     SkRect sk_rect = RectFToSkRect(debug_layer_rect);
 661     paint.setColor(fill_color);
 662     paint.setStyle(SkPaint::kFill_Style);
 663     canvas->drawRect(sk_rect, paint);
 664
 665     paint.setColor(stroke_color);
 666     paint.setStyle(SkPaint::kStroke_Style);
 667     paint.setStrokeWidth(SkFloatToScalar(stroke_width));
 668     canvas->drawRect(sk_rect, paint);
 669
 670     if (label_text.length()) {
 671       const int kFontHeight = 12;
 672       const int kPadding = 3;
 673
 674       canvas->save();
 675       canvas->clipRect(sk_rect);
 676       canvas->translate(sk_rect.x(), sk_rect.y());
 677
 678       SkPaint label_paint = CreatePaint();
 679       label_paint.setTextSize(kFontHeight);
 680       label_paint.setTypeface(typeface_.get());
 681       label_paint.setColor(stroke_color);
 682
 683       const SkScalar label_text_width =
 684           label_paint.measureText(label_text.c_str(), label_text.length());
 685       canvas->drawRect(SkRect::MakeWH(label_text_width + 2 * kPadding,
 686                                       kFontHeight + 2 * kPadding),
 687                        label_paint);
 688
 689       label_paint.setAntiAlias(true);
 690       label_paint.setColor(SkColorSetARGB(255, 50, 50, 50));
 691       canvas->drawText(label_text.c_str(),
 692                        label_text.length(),
 693                        kPadding,
 694                        kFontHeight * 0.8f + kPadding,
 695                        label_paint);
 696
 697       canvas->restore();
 698     }
 699   }
 700 }
 701
 702 const char* HeadsUpDisplayLayerImpl::LayerTypeAsString() const {
 703   return "cc::HeadsUpDisplayLayerImpl";
 704 }
 705
 706 }  // namespace cc