src/cc/debug/overdraw_metrics.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/debug/overdraw_metrics.h"
   6
   7 #include "base/debug/trace_event.h"
   8 #include "base/metrics/histogram.h"
   9 #include "cc/base/math_util.h"
  10 #include "cc/trees/layer_tree_host.h"
  11 #include "cc/trees/layer_tree_host_impl.h"
  12 #include "ui/gfx/quad_f.h"
  13 #include "ui/gfx/rect.h"
  14 #include "ui/gfx/transform.h"
  15
  16 namespace cc {
  17
  18 OverdrawMetrics::OverdrawMetrics(bool record_metrics_for_frame)
  19     : record_metrics_for_frame_(record_metrics_for_frame),
  20       pixels_painted_(0),
  21       pixels_uploaded_opaque_(0),
  22       pixels_uploaded_translucent_(0),
  23       tiles_culled_for_upload_(0),
  24       contents_texture_use_bytes_(0),
  25       render_surface_texture_use_bytes_(0),
  26       pixels_drawn_opaque_(0),
  27       pixels_drawn_translucent_(0),
  28       pixels_culled_for_drawing_(0) {}
  29
  30 static inline float WedgeProduct(gfx::PointF p1, gfx::PointF p2) {
  31   return p1.x() * p2.y() - p1.y() * p2.x();
  32 }
  33
  34 // Calculates area of an arbitrary convex polygon with up to 8 points.
  35 static inline float PolygonArea(gfx::PointF points[8], int num_points) {
  36   if (num_points < 3)
  37     return 0;
  38
  39   float area = 0;
  40   for (int i = 0; i < num_points; ++i)
  41     area += WedgeProduct(points[i], points[(i+1)%num_points]);
  42   return std::abs(0.5f * area);
  43 }
  44
  45 // Takes a given quad, maps it by the given transformation, and gives the area
  46 // of the resulting polygon.
  47 static inline float AreaOfMappedQuad(const gfx::Transform& transform,
  48                                      const gfx::QuadF& quad) {
  49   gfx::PointF clipped_quad[8];
  50   int num_vertices_in_clipped_quad = 0;
  51   MathUtil::MapClippedQuad(transform,
  52                            quad,
  53                            clipped_quad,
  54                            &num_vertices_in_clipped_quad);
  55   return PolygonArea(clipped_quad, num_vertices_in_clipped_quad);
  56 }
  57
  58 void OverdrawMetrics::DidPaint(gfx::Rect painted_rect) {
  59   if (!record_metrics_for_frame_)
  60     return;
  61
  62   pixels_painted_ +=
  63       static_cast<float>(painted_rect.width()) * painted_rect.height();
  64 }
  65
  66 void OverdrawMetrics::DidCullTilesForUpload(int count) {
  67   if (record_metrics_for_frame_)
  68     tiles_culled_for_upload_ += count;
  69 }
  70
  71 void OverdrawMetrics::DidUpload(const gfx::Transform& transform_to_target,
  72                                 gfx::Rect upload_rect,
  73                                 gfx::Rect opaque_rect) {
  74   if (!record_metrics_for_frame_)
  75     return;
  76
  77   float upload_area =
  78       AreaOfMappedQuad(transform_to_target, gfx::QuadF(upload_rect));
  79   float upload_opaque_area =
  80       AreaOfMappedQuad(transform_to_target,
  81                        gfx::QuadF(gfx::IntersectRects(opaque_rect,
  82                                                       upload_rect)));
  83
  84   pixels_uploaded_opaque_ += upload_opaque_area;
  85   pixels_uploaded_translucent_ += upload_area - upload_opaque_area;
  86 }
  87
  88 void OverdrawMetrics::DidUseContentsTextureMemoryBytes(
  89     size_t contents_texture_use_bytes) {
  90   if (!record_metrics_for_frame_)
  91     return;
  92
  93   contents_texture_use_bytes_ += contents_texture_use_bytes;
  94 }
  95
  96 void OverdrawMetrics::DidUseRenderSurfaceTextureMemoryBytes(
  97     size_t render_surface_use_bytes) {
  98   if (!record_metrics_for_frame_)
  99     return;
 100
 101   render_surface_texture_use_bytes_ += render_surface_use_bytes;
 102 }
 103
 104 void OverdrawMetrics::DidCullForDrawing(
 105     const gfx::Transform& transform_to_target,
 106     gfx::Rect before_cull_rect,
 107     gfx::Rect after_cull_rect) {
 108   if (!record_metrics_for_frame_)
 109     return;
 110
 111   float before_cull_area =
 112       AreaOfMappedQuad(transform_to_target, gfx::QuadF(before_cull_rect));
 113   float after_cull_area =
 114       AreaOfMappedQuad(transform_to_target, gfx::QuadF(after_cull_rect));
 115
 116   pixels_culled_for_drawing_ += before_cull_area - after_cull_area;
 117 }
 118
 119 void OverdrawMetrics::DidDraw(const gfx::Transform& transform_to_target,
 120                               gfx::Rect after_cull_rect,
 121                               gfx::Rect opaque_rect) {
 122   if (!record_metrics_for_frame_)
 123     return;
 124
 125   float after_cull_area =
 126       AreaOfMappedQuad(transform_to_target, gfx::QuadF(after_cull_rect));
 127   float after_cull_opaque_area =
 128       AreaOfMappedQuad(transform_to_target,
 129                        gfx::QuadF(gfx::IntersectRects(opaque_rect,
 130                                                       after_cull_rect)));
 131
 132   pixels_drawn_opaque_ += after_cull_opaque_area;
 133   pixels_drawn_translucent_ += after_cull_area - after_cull_opaque_area;
 134 }
 135
 136 void OverdrawMetrics::RecordMetrics(
 137     const LayerTreeHost* layer_tree_host) const {
 138   if (record_metrics_for_frame_)
 139     RecordMetricsInternal<LayerTreeHost>(UpdateAndCommit, layer_tree_host);
 140 }
 141
 142 void OverdrawMetrics::RecordMetrics(
 143     const LayerTreeHostImpl* layer_tree_host_impl) const {
 144   if (record_metrics_for_frame_) {
 145     RecordMetricsInternal<LayerTreeHostImpl>(DrawingToScreen,
 146                                              layer_tree_host_impl);
 147   }
 148 }
 149
 150 static gfx::Size DrawViewportSize(const LayerTreeHost* host) {
 151   return host->device_viewport_size();
 152 }
 153 static gfx::Size DrawViewportSize(const LayerTreeHostImpl* host_impl) {
 154   return host_impl->DrawViewportSize();
 155 }
 156
 157 template <typename LayerTreeHostType>
 158 void OverdrawMetrics::RecordMetricsInternal(
 159     MetricsType metrics_type,
 160     const LayerTreeHostType* layer_tree_host) const {
 161   // This gives approximately 10x the percentage of pixels to fill the viewport
 162   // once.
 163   float normalization = 1000.f / (DrawViewportSize(layer_tree_host).width() *
 164                                   DrawViewportSize(layer_tree_host).height());
 165   // This gives approximately 100x the percentage of tiles to fill the viewport
 166   // once, if all tiles were 256x256.
 167   float tile_normalization =
 168       10000.f / (DrawViewportSize(layer_tree_host).width() / 256.f *
 169                  DrawViewportSize(layer_tree_host).height() / 256.f);
 170   // This gives approximately 10x the percentage of bytes to fill the viewport
 171   // once, assuming 4 bytes per pixel.
 172   float byte_normalization = normalization / 4;
 173
 174   switch (metrics_type) {
 175     case DrawingToScreen: {
 176       UMA_HISTOGRAM_CUSTOM_COUNTS(
 177           "Renderer4.pixelCountOpaque_Draw",
 178           static_cast<int>(normalization * pixels_drawn_opaque_),
 179           100, 1000000, 50);
 180       UMA_HISTOGRAM_CUSTOM_COUNTS(
 181           "Renderer4.pixelCountTranslucent_Draw",
 182           static_cast<int>(normalization * pixels_drawn_translucent_),
 183           100, 1000000, 50);
 184       UMA_HISTOGRAM_CUSTOM_COUNTS(
 185           "Renderer4.pixelCountCulled_Draw",
 186           static_cast<int>(normalization * pixels_culled_for_drawing_),
 187           100, 1000000, 50);
 188
 189       TRACE_COUNTER_ID1("cc",
 190                         "DrawPixelsCulled",
 191                         layer_tree_host,
 192                         pixels_culled_for_drawing_);
 193       TRACE_EVENT2("cc",
 194                    "OverdrawMetrics",
 195                    "PixelsDrawnOpaque",
 196                    pixels_drawn_opaque_,
 197                    "PixelsDrawnTranslucent",
 198                    pixels_drawn_translucent_);
 199       break;
 200     }
 201     case UpdateAndCommit: {
 202       UMA_HISTOGRAM_CUSTOM_COUNTS(
 203           "Renderer4.pixelCountPainted",
 204           static_cast<int>(normalization * pixels_painted_),
 205           100, 1000000, 50);
 206       UMA_HISTOGRAM_CUSTOM_COUNTS(
 207           "Renderer4.pixelCountOpaque_Upload",
 208           static_cast<int>(normalization * pixels_uploaded_opaque_),
 209           100, 1000000, 50);
 210       UMA_HISTOGRAM_CUSTOM_COUNTS(
 211           "Renderer4.pixelCountTranslucent_Upload",
 212           static_cast<int>(normalization * pixels_uploaded_translucent_),
 213           100, 1000000, 50);
 214       UMA_HISTOGRAM_CUSTOM_COUNTS(
 215           "Renderer4.tileCountCulled_Upload",
 216           static_cast<int>(tile_normalization * tiles_culled_for_upload_),
 217           100, 10000000, 50);
 218       UMA_HISTOGRAM_CUSTOM_COUNTS(
 219           "Renderer4.renderSurfaceTextureBytes_ViewportScaled",
 220           static_cast<int>(
 221               byte_normalization * render_surface_texture_use_bytes_),
 222           10, 1000000, 50);
 223       UMA_HISTOGRAM_CUSTOM_COUNTS(
 224           "Renderer4.renderSurfaceTextureBytes_Unscaled",
 225           static_cast<int>(render_surface_texture_use_bytes_ / 1000),
 226           1000, 100000000, 50);
 227       UMA_HISTOGRAM_CUSTOM_COUNTS(
 228           "Renderer4.contentsTextureBytes_ViewportScaled",
 229           static_cast<int>(byte_normalization * contents_texture_use_bytes_),
 230           10, 1000000, 50);
 231       UMA_HISTOGRAM_CUSTOM_COUNTS(
 232           "Renderer4.contentsTextureBytes_Unscaled",
 233           static_cast<int>(contents_texture_use_bytes_ / 1000),
 234           1000, 100000000, 50);
 235       {
 236         TRACE_COUNTER_ID1("cc",
 237                           "UploadTilesCulled",
 238                           layer_tree_host,
 239                           tiles_culled_for_upload_);
 240         TRACE_EVENT2("cc",
 241                      "OverdrawMetrics",
 242                      "PixelsUploadedOpaque",
 243                      pixels_uploaded_opaque_,
 244                      "PixelsUploadedTranslucent",
 245                      pixels_uploaded_translucent_);
 246       }
 247       {
 248         // This must be in a different scope than the TRACE_EVENT2 above.
 249         TRACE_EVENT1("cc",
 250                      "OverdrawPaintMetrics",
 251                      "PixelsPainted",
 252                      pixels_painted_);
 253       }
 254       {
 255         // This must be in a different scope than the TRACE_EVENTs above.
 256         TRACE_EVENT2("cc",
 257                      "OverdrawPaintMetrics",
 258                      "ContentsTextureBytes",
 259                      contents_texture_use_bytes_,
 260                      "RenderSurfaceTextureBytes",
 261                      render_surface_texture_use_bytes_);
 262       }
 263       break;
 264     }
 265   }
 266 }
 267
 268 }  // namespace cc