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/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(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()).PassAs<LayerImpl>();
  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 OcclusionTracker<LayerImpl>& occlusion_tracker,
 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(NULL);
 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   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 389   DrawText(canvas,
 390            &paint,
 391            value_text,
 392            SkPaint::kLeft_Align,
 393            kFontHeight,
 394            text_bounds.left(),
 395            text_bounds.bottom());
 396   DrawText(canvas,
 397            &paint,
 398            min_max_text,
 399            SkPaint::kRight_Align,
 400            kFontHeight,
 401            text_bounds.right(),
 402            text_bounds.bottom());
 403
 404   DrawGraphLines(canvas, &paint, graph_bounds, fps_graph_);
 405
 406   // Collect graph and histogram data.
 407   SkPath path;
 408
 409   const int kHistogramSize = 20;
 410   double histogram[kHistogramSize] = { 1.0 };
 411   double max_bucket_value = 1.0;
 412
 413   for (FrameRateCounter::RingBufferType::Iterator it = --fps_counter->end(); it;
 414        --it) {
 415     base::TimeDelta delta = fps_counter->RecentFrameInterval(it.index() + 1);
 416
 417     // Skip this particular instantaneous frame rate if it is not likely to have
 418     // been valid.
 419     if (!fps_counter->IsBadFrameInterval(delta)) {
 420       double fps = 1.0 / delta.InSecondsF();
 421
 422       // Clamp the FPS to the range we want to plot visually.
 423       double p = fps / fps_graph_.current_upper_bound;
 424       if (p > 1.0)
 425         p = 1.0;
 426
 427       // Plot this data point.
 428       SkPoint cur =
 429           SkPoint::Make(graph_bounds.left() + it.index(),
 430                         graph_bounds.bottom() - p * graph_bounds.height());
 431       if (path.isEmpty())
 432         path.moveTo(cur);
 433       else
 434         path.lineTo(cur);
 435
 436       // Use the fps value to find the right bucket in the histogram.
 437       int bucket_index = floor(p * (kHistogramSize - 1));
 438
 439       // Add the delta time to take the time spent at that fps rate into
 440       // account.
 441       histogram[bucket_index] += delta.InSecondsF();
 442       max_bucket_value = std::max(histogram[bucket_index], max_bucket_value);
 443     }
 444   }
 445
 446   // Draw FPS histogram.
 447   paint.setColor(DebugColors::HUDSeparatorLineColor());
 448   canvas->drawLine(histogram_bounds.left() - 1,
 449                    histogram_bounds.top() - 1,
 450                    histogram_bounds.left() - 1,
 451                    histogram_bounds.bottom() + 1,
 452                    paint);
 453   canvas->drawLine(histogram_bounds.right() + 1,
 454                    histogram_bounds.top() - 1,
 455                    histogram_bounds.right() + 1,
 456                    histogram_bounds.bottom() + 1,
 457                    paint);
 458
 459   paint.setColor(DebugColors::FPSDisplayTextAndGraphColor());
 460   const double bar_height = histogram_bounds.height() / kHistogramSize;
 461
 462   for (int i = kHistogramSize - 1; i >= 0; --i) {
 463     if (histogram[i] > 0) {
 464       double bar_width =
 465           histogram[i] / max_bucket_value * histogram_bounds.width();
 466       canvas->drawRect(
 467           SkRect::MakeXYWH(histogram_bounds.left(),
 468                            histogram_bounds.bottom() - (i + 1) * bar_height,
 469                            bar_width,
 470                            1),
 471           paint);
 472     }
 473   }
 474
 475   // Draw FPS graph.
 476   paint.setAntiAlias(true);
 477   paint.setStyle(SkPaint::kStroke_Style);
 478   paint.setStrokeWidth(1);
 479   canvas->drawPath(path, paint);
 480
 481   return area;
 482 }
 483
 484 SkRect HeadsUpDisplayLayerImpl::DrawMemoryDisplay(SkCanvas* canvas,
 485                                                   int right,
 486                                                   int top,
 487                                                   int width) const {
 488   if (!memory_entry_.bytes_total())
 489     return SkRect::MakeEmpty();
 490
 491   const int kPadding = 4;
 492   const int kFontHeight = 13;
 493
 494   const int height = 3 * kFontHeight + 4 * kPadding;
 495   const int left = bounds().width() - width - right;
 496   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 497
 498   const double megabyte = 1024.0 * 1024.0;
 499
 500   SkPaint paint = CreatePaint();
 501   DrawGraphBackground(canvas, &paint, area);
 502
 503   SkPoint title_pos = SkPoint::Make(left + kPadding, top + kFontHeight);
 504   SkPoint stat1_pos = SkPoint::Make(left + width - kPadding - 1,
 505                                     top + kPadding + 2 * kFontHeight);
 506   SkPoint stat2_pos = SkPoint::Make(left + width - kPadding - 1,
 507                                     top + 2 * kPadding + 3 * kFontHeight);
 508
 509   paint.setColor(DebugColors::MemoryDisplayTextColor());
 510   DrawText(canvas,
 511            &paint,
 512            "GPU memory",
 513            SkPaint::kLeft_Align,
 514            kFontHeight,
 515            title_pos);
 516
 517   std::string text =
 518       base::StringPrintf("%6.1f MB used",
 519                          (memory_entry_.bytes_unreleasable +
 520                           memory_entry_.bytes_allocated) / megabyte);
 521   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat1_pos);
 522
 523   if (memory_entry_.bytes_over) {
 524     paint.setColor(SK_ColorRED);
 525     text = base::StringPrintf("%6.1f MB over",
 526                               memory_entry_.bytes_over / megabyte);
 527   } else {
 528     text = base::StringPrintf("%6.1f MB max ",
 529                               memory_entry_.total_budget_in_bytes / megabyte);
 530   }
 531   DrawText(canvas, &paint, text, SkPaint::kRight_Align, kFontHeight, stat2_pos);
 532
 533   return area;
 534 }
 535
 536 SkRect HeadsUpDisplayLayerImpl::DrawPaintTimeDisplay(
 537     SkCanvas* canvas,
 538     const PaintTimeCounter* paint_time_counter,
 539     int right,
 540     int top) const {
 541   const int kPadding = 4;
 542   const int kFontHeight = 15;
 543
 544   const int kGraphWidth = paint_time_counter->HistorySize();
 545   const int kGraphHeight = 40;
 546
 547   const int width = kGraphWidth + 2 * kPadding;
 548   const int height =
 549       kFontHeight + kGraphHeight + 4 * kPadding + 2 + kFontHeight + kPadding;
 550   const int left = bounds().width() - width - right;
 551
 552   const SkRect area = SkRect::MakeXYWH(left, top, width, height);
 553
 554   SkPaint paint = CreatePaint();
 555   DrawGraphBackground(canvas, &paint, area);
 556
 557   SkRect text_bounds = SkRect::MakeXYWH(
 558       left + kPadding, top + kPadding, kGraphWidth, kFontHeight);
 559   SkRect text_bounds2 = SkRect::MakeXYWH(left + kPadding,
 560                                          text_bounds.bottom() + kPadding,
 561                                          kGraphWidth,
 562                                          kFontHeight);
 563   SkRect graph_bounds = SkRect::MakeXYWH(left + kPadding,
 564                                          text_bounds2.bottom() + 2 * kPadding,
 565                                          kGraphWidth,
 566                                          kGraphHeight);
 567
 568   const std::string value_text =
 569       base::StringPrintf("%.1f", paint_time_graph_.value);
 570   const std::string min_max_text = base::StringPrintf(
 571       "%.1f-%.1f", paint_time_graph_.min, paint_time_graph_.max);
 572
 573   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 574   DrawText(canvas,
 575            &paint,
 576            "Page paint time (ms)",
 577            SkPaint::kLeft_Align,
 578            kFontHeight,
 579            text_bounds.left(),
 580            text_bounds.bottom());
 581   DrawText(canvas,
 582            &paint,
 583            value_text,
 584            SkPaint::kLeft_Align,
 585            kFontHeight,
 586            text_bounds2.left(),
 587            text_bounds2.bottom());
 588   DrawText(canvas,
 589            &paint,
 590            min_max_text,
 591            SkPaint::kRight_Align,
 592            kFontHeight,
 593            text_bounds2.right(),
 594            text_bounds2.bottom());
 595
 596   paint.setColor(DebugColors::PaintTimeDisplayTextAndGraphColor());
 597   for (PaintTimeCounter::RingBufferType::Iterator it =
 598            paint_time_counter->End();
 599        it;
 600        --it) {
 601     double pt = it->InMillisecondsF();
 602
 603     if (pt == 0.0)
 604       continue;
 605
 606     double p = pt / paint_time_graph_.current_upper_bound;
 607     if (p > 1.0)
 608       p = 1.0;
 609
 610     canvas->drawRect(
 611         SkRect::MakeXYWH(graph_bounds.left() + it.index(),
 612                          graph_bounds.bottom() - p * graph_bounds.height(),
 613                          1,
 614                          p * graph_bounds.height()),
 615         paint);
 616   }
 617
 618   DrawGraphLines(canvas, &paint, graph_bounds, paint_time_graph_);
 619
 620   return area;
 621 }
 622
 623 void HeadsUpDisplayLayerImpl::DrawDebugRect(
 624     SkCanvas* canvas,
 625     SkPaint* paint,
 626     const DebugRect& rect,
 627     SkColor stroke_color,
 628     SkColor fill_color,
 629     float stroke_width,
 630     const std::string& label_text) const {
 631   gfx::Rect debug_layer_rect = gfx::ScaleToEnclosingRect(
 632       rect.rect, 1.0 / contents_scale_x(), 1.0 / contents_scale_y());
 633   SkIRect sk_rect = RectToSkIRect(debug_layer_rect);
 634   paint->setColor(fill_color);
 635   paint->setStyle(SkPaint::kFill_Style);
 636   canvas->drawIRect(sk_rect, *paint);
 637
 638   paint->setColor(stroke_color);
 639   paint->setStyle(SkPaint::kStroke_Style);
 640   paint->setStrokeWidth(SkFloatToScalar(stroke_width));
 641   canvas->drawIRect(sk_rect, *paint);
 642
 643   if (label_text.length()) {
 644     const int kFontHeight = 12;
 645     const int kPadding = 3;
 646
 647     // The debug_layer_rect may be huge, and converting to a floating point may
 648     // be lossy, so intersect with the HUD layer bounds first to prevent that.
 649     gfx::Rect clip_rect = debug_layer_rect;
 650     clip_rect.Intersect(gfx::Rect(content_bounds()));
 651     SkRect sk_clip_rect = RectToSkRect(clip_rect);
 652
 653     canvas->save();
 654     canvas->clipRect(sk_clip_rect);
 655     canvas->translate(sk_clip_rect.x(), sk_clip_rect.y());
 656
 657     SkPaint label_paint = CreatePaint();
 658     label_paint.setTextSize(kFontHeight);
 659     label_paint.setTypeface(typeface_.get());
 660     label_paint.setColor(stroke_color);
 661
 662     const SkScalar label_text_width =
 663         label_paint.measureText(label_text.c_str(), label_text.length());
 664     canvas->drawRect(SkRect::MakeWH(label_text_width + 2 * kPadding,
 665                                     kFontHeight + 2 * kPadding),
 666                      label_paint);
 667
 668     label_paint.setAntiAlias(true);
 669     label_paint.setColor(SkColorSetARGB(255, 50, 50, 50));
 670     canvas->drawText(label_text.c_str(),
 671                      label_text.length(),
 672                      kPadding,
 673                      kFontHeight * 0.8f + kPadding,
 674                      label_paint);
 675
 676     canvas->restore();
 677   }
 678 }
 679
 680 void HeadsUpDisplayLayerImpl::DrawDebugRects(
 681     SkCanvas* canvas,
 682     DebugRectHistory* debug_rect_history) {
 683   SkPaint paint = CreatePaint();
 684
 685   const std::vector<DebugRect>& debug_rects = debug_rect_history->debug_rects();
 686   std::vector<DebugRect> new_paint_rects;
 687
 688   for (size_t i = 0; i < debug_rects.size(); ++i) {
 689     SkColor stroke_color = 0;
 690     SkColor fill_color = 0;
 691     float stroke_width = 0.f;
 692     std::string label_text;
 693
 694     switch (debug_rects[i].type) {
 695       case PAINT_RECT_TYPE:
 696         new_paint_rects.push_back(debug_rects[i]);
 697         continue;
 698       case PROPERTY_CHANGED_RECT_TYPE:
 699         stroke_color = DebugColors::PropertyChangedRectBorderColor();
 700         fill_color = DebugColors::PropertyChangedRectFillColor();
 701         stroke_width = DebugColors::PropertyChangedRectBorderWidth();
 702         break;
 703       case SURFACE_DAMAGE_RECT_TYPE:
 704         stroke_color = DebugColors::SurfaceDamageRectBorderColor();
 705         fill_color = DebugColors::SurfaceDamageRectFillColor();
 706         stroke_width = DebugColors::SurfaceDamageRectBorderWidth();
 707         break;
 708       case REPLICA_SCREEN_SPACE_RECT_TYPE:
 709         stroke_color = DebugColors::ScreenSpaceSurfaceReplicaRectBorderColor();
 710         fill_color = DebugColors::ScreenSpaceSurfaceReplicaRectFillColor();
 711         stroke_width = DebugColors::ScreenSpaceSurfaceReplicaRectBorderWidth();
 712         break;
 713       case SCREEN_SPACE_RECT_TYPE:
 714         stroke_color = DebugColors::ScreenSpaceLayerRectBorderColor();
 715         fill_color = DebugColors::ScreenSpaceLayerRectFillColor();
 716         stroke_width = DebugColors::ScreenSpaceLayerRectBorderWidth();
 717         break;
 718       case OCCLUDING_RECT_TYPE:
 719         stroke_color = DebugColors::OccludingRectBorderColor();
 720         fill_color = DebugColors::OccludingRectFillColor();
 721         stroke_width = DebugColors::OccludingRectBorderWidth();
 722         break;
 723       case NONOCCLUDING_RECT_TYPE:
 724         stroke_color = DebugColors::NonOccludingRectBorderColor();
 725         fill_color = DebugColors::NonOccludingRectFillColor();
 726         stroke_width = DebugColors::NonOccludingRectBorderWidth();
 727         break;
 728       case TOUCH_EVENT_HANDLER_RECT_TYPE:
 729         stroke_color = DebugColors::TouchEventHandlerRectBorderColor();
 730         fill_color = DebugColors::TouchEventHandlerRectFillColor();
 731         stroke_width = DebugColors::TouchEventHandlerRectBorderWidth();
 732         label_text = "touch event listener";
 733         break;
 734       case WHEEL_EVENT_HANDLER_RECT_TYPE:
 735         stroke_color = DebugColors::WheelEventHandlerRectBorderColor();
 736         fill_color = DebugColors::WheelEventHandlerRectFillColor();
 737         stroke_width = DebugColors::WheelEventHandlerRectBorderWidth();
 738         label_text = "mousewheel event listener";
 739         break;
 740       case SCROLL_EVENT_HANDLER_RECT_TYPE:
 741         stroke_color = DebugColors::ScrollEventHandlerRectBorderColor();
 742         fill_color = DebugColors::ScrollEventHandlerRectFillColor();
 743         stroke_width = DebugColors::ScrollEventHandlerRectBorderWidth();
 744         label_text = "scroll event listener";
 745         break;
 746       case NON_FAST_SCROLLABLE_RECT_TYPE:
 747         stroke_color = DebugColors::NonFastScrollableRectBorderColor();
 748         fill_color = DebugColors::NonFastScrollableRectFillColor();
 749         stroke_width = DebugColors::NonFastScrollableRectBorderWidth();
 750         label_text = "repaints on scroll";
 751         break;
 752       case ANIMATION_BOUNDS_RECT_TYPE:
 753         stroke_color = DebugColors::LayerAnimationBoundsBorderColor();
 754         fill_color = DebugColors::LayerAnimationBoundsFillColor();
 755         stroke_width = DebugColors::LayerAnimationBoundsBorderWidth();
 756         label_text = "animation bounds";
 757         break;
 758     }
 759
 760     DrawDebugRect(canvas,
 761                   &paint,
 762                   debug_rects[i],
 763                   stroke_color,
 764                   fill_color,
 765                   stroke_width,
 766                   label_text);
 767   }
 768
 769   if (new_paint_rects.size()) {
 770     paint_rects_.swap(new_paint_rects);
 771     fade_step_ = DebugColors::kFadeSteps;
 772   }
 773   if (fade_step_ > 0) {
 774     fade_step_--;
 775     for (size_t i = 0; i < paint_rects_.size(); ++i) {
 776       DrawDebugRect(canvas,
 777                     &paint,
 778                     paint_rects_[i],
 779                     DebugColors::PaintRectBorderColor(fade_step_),
 780                     DebugColors::PaintRectFillColor(fade_step_),
 781                     DebugColors::PaintRectBorderWidth(),
 782                     "");
 783     }
 784   }
 785 }
 786
 787 const char* HeadsUpDisplayLayerImpl::LayerTypeAsString() const {
 788   return "cc::HeadsUpDisplayLayerImpl";
 789 }
 790
 791 void HeadsUpDisplayLayerImpl::AsValueInto(
 792     base::debug::TracedValue* dict) const {
 793   LayerImpl::AsValueInto(dict);
 794   dict->SetString("layer_name", "Heads Up Display Layer");
 795 }
 796
 797 }  // namespace cc