src/content/renderer/skia_benchmarking_extension.cc

   1 // Copyright (c) 2013 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 "content/renderer/skia_benchmarking_extension.h"
   6
   7 #include "base/base64.h"
   8 #include "base/time/time.h"
   9 #include "base/values.h"
  10 #include "cc/base/math_util.h"
  11 #include "cc/resources/picture.h"
  12 #include "content/public/renderer/v8_value_converter.h"
  13 #include "content/renderer/render_thread_impl.h"
  14 #include "gin/arguments.h"
  15 #include "gin/handle.h"
  16 #include "gin/object_template_builder.h"
  17 #include "skia/ext/benchmarking_canvas.h"
  18 #include "third_party/WebKit/public/platform/WebArrayBuffer.h"
  19 #include "third_party/WebKit/public/web/WebFrame.h"
  20 #include "third_party/WebKit/public/web/WebKit.h"
  21 #include "third_party/skia/include/core/SkBitmapDevice.h"
  22 #include "third_party/skia/include/core/SkCanvas.h"
  23 #include "third_party/skia/include/core/SkColorPriv.h"
  24 #include "third_party/skia/include/core/SkGraphics.h"
  25 #include "third_party/skia/include/core/SkStream.h"
  26 #include "third_party/skia/src/utils/debugger/SkDebugCanvas.h"
  27 #include "third_party/skia/src/utils/debugger/SkDrawCommand.h"
  28 #include "ui/gfx/rect_conversions.h"
  29 #include "ui/gfx/skia_util.h"
  30 #include "v8/include/v8.h"
  31
  32
  33 namespace content {
  34
  35 namespace {
  36
  37 scoped_ptr<base::Value> ParsePictureArg(v8::Isolate* isolate,
  38                                         v8::Handle<v8::Value> arg) {
  39   scoped_ptr<content::V8ValueConverter> converter(
  40       content::V8ValueConverter::create());
  41   return scoped_ptr<base::Value>(
  42       converter->FromV8Value(arg, isolate->GetCurrentContext()));
  43 }
  44
  45 scoped_refptr<cc::Picture> ParsePictureStr(v8::Isolate* isolate,
  46                                            v8::Handle<v8::Value> arg) {
  47   scoped_ptr<base::Value> picture_value = ParsePictureArg(isolate, arg);
  48   if (!picture_value)
  49     return NULL;
  50   return cc::Picture::CreateFromSkpValue(picture_value.get());
  51 }
  52
  53 scoped_refptr<cc::Picture> ParsePictureHash(v8::Isolate* isolate,
  54                                             v8::Handle<v8::Value> arg) {
  55   scoped_ptr<base::Value> picture_value = ParsePictureArg(isolate, arg);
  56   if (!picture_value)
  57     return NULL;
  58   return cc::Picture::CreateFromValue(picture_value.get());
  59 }
  60
  61 }  // namespace
  62
  63 gin::WrapperInfo SkiaBenchmarking::kWrapperInfo = {gin::kEmbedderNativeGin};
  64
  65 // static
  66 void SkiaBenchmarking::Install(blink::WebFrame* frame) {
  67   v8::Isolate* isolate = blink::mainThreadIsolate();
  68   v8::HandleScope handle_scope(isolate);
  69   v8::Handle<v8::Context> context = frame->mainWorldScriptContext();
  70   if (context.IsEmpty())
  71     return;
  72
  73   v8::Context::Scope context_scope(context);
  74
  75   gin::Handle<SkiaBenchmarking> controller =
  76       gin::CreateHandle(isolate, new SkiaBenchmarking());
  77   v8::Handle<v8::Object> global = context->Global();
  78   v8::Handle<v8::Object> chrome =
  79       global->Get(gin::StringToV8(isolate, "chrome"))->ToObject();
  80   if (chrome.IsEmpty()) {
  81     chrome = v8::Object::New(isolate);
  82     global->Set(gin::StringToV8(isolate, "chrome"), chrome);
  83   }
  84   chrome->Set(gin::StringToV8(isolate, "skiaBenchmarking"), controller.ToV8());
  85 }
  86
  87 // static
  88 void SkiaBenchmarking::Initialize() {
  89   DCHECK(RenderThreadImpl::current());
  90   // FIXME: remove this after Skia updates SkGraphics::Init() to be
  91   //        thread-safe and idempotent.
  92   static bool skia_initialized = false;
  93   if (!skia_initialized) {
  94     LOG(WARNING) << "Enabling unsafe Skia benchmarking extension.";
  95     SkGraphics::Init();
  96     skia_initialized = true;
  97   }
  98 }
  99
 100 SkiaBenchmarking::SkiaBenchmarking() {
 101   Initialize();
 102 }
 103
 104 SkiaBenchmarking::~SkiaBenchmarking() {}
 105
 106 gin::ObjectTemplateBuilder SkiaBenchmarking::GetObjectTemplateBuilder(
 107     v8::Isolate* isolate) {
 108   return gin::Wrappable<SkiaBenchmarking>::GetObjectTemplateBuilder(isolate)
 109       .SetMethod("rasterize", &SkiaBenchmarking::Rasterize)
 110       .SetMethod("getOps", &SkiaBenchmarking::GetOps)
 111       .SetMethod("getOpTimings", &SkiaBenchmarking::GetOpTimings)
 112       .SetMethod("getInfo", &SkiaBenchmarking::GetInfo);
 113 }
 114
 115 void SkiaBenchmarking::Rasterize(gin::Arguments* args) {
 116   v8::Isolate* isolate = args->isolate();
 117   if (args->PeekNext().IsEmpty())
 118     return;
 119   v8::Handle<v8::Value> picture_handle;
 120   args->GetNext(&picture_handle);
 121   scoped_refptr<cc::Picture> picture =
 122       ParsePictureHash(isolate, picture_handle);
 123   if (!picture.get())
 124     return;
 125
 126   double scale = 1.0;
 127   gfx::Rect clip_rect(picture->LayerRect());
 128   int stop_index = -1;
 129   bool overdraw = false;
 130
 131   if (!args->PeekNext().IsEmpty()) {
 132     v8::Handle<v8::Value> params;
 133     args->GetNext(&params);
 134     scoped_ptr<content::V8ValueConverter> converter(
 135         content::V8ValueConverter::create());
 136     scoped_ptr<base::Value> params_value(
 137         converter->FromV8Value(params, isolate->GetCurrentContext()));
 138
 139     const base::DictionaryValue* params_dict = NULL;
 140     if (params_value.get() && params_value->GetAsDictionary(&params_dict)) {
 141       params_dict->GetDouble("scale", &scale);
 142       params_dict->GetInteger("stop", &stop_index);
 143       params_dict->GetBoolean("overdraw", &overdraw);
 144
 145       const base::Value* clip_value = NULL;
 146       if (params_dict->Get("clip", &clip_value))
 147         cc::MathUtil::FromValue(clip_value, &clip_rect);
 148     }
 149   }
 150
 151   gfx::RectF clip(clip_rect);
 152   clip.Intersect(picture->LayerRect());
 153   clip.Scale(scale);
 154   gfx::Rect snapped_clip = gfx::ToEnclosingRect(clip);
 155
 156   const int kMaxBitmapSize = 4096;
 157   if (snapped_clip.width() > kMaxBitmapSize ||
 158       snapped_clip.height() > kMaxBitmapSize)
 159     return;
 160
 161   SkBitmap bitmap;
 162   bitmap.setConfig(
 163       SkBitmap::kARGB_8888_Config, snapped_clip.width(), snapped_clip.height());
 164   if (!bitmap.allocPixels())
 165     return;
 166   bitmap.eraseARGB(0, 0, 0, 0);
 167
 168   SkCanvas canvas(bitmap);
 169   canvas.translate(SkFloatToScalar(-clip.x()), SkFloatToScalar(-clip.y()));
 170   canvas.clipRect(gfx::RectToSkRect(snapped_clip));
 171   canvas.scale(scale, scale);
 172   canvas.translate(picture->LayerRect().x(), picture->LayerRect().y());
 173
 174   // First, build a debug canvas for the given picture.
 175   SkDebugCanvas debug_canvas(picture->LayerRect().width(),
 176                              picture->LayerRect().height());
 177   picture->Replay(&debug_canvas);
 178
 179   // Raster the requested command subset into the bitmap-backed canvas.
 180   int last_index = debug_canvas.getSize() - 1;
 181   if (last_index >= 0) {
 182     debug_canvas.setOverdrawViz(overdraw);
 183     debug_canvas.drawTo(
 184         &canvas,
 185         stop_index < 0 ? last_index : std::min(last_index, stop_index));
 186   }
 187
 188   blink::WebArrayBuffer buffer =
 189       blink::WebArrayBuffer::create(bitmap.getSize(), 1);
 190   uint32* packed_pixels = reinterpret_cast<uint32*>(bitmap.getPixels());
 191   uint8* buffer_pixels = reinterpret_cast<uint8*>(buffer.data());
 192   // Swizzle from native Skia format to RGBA as we copy out.
 193   for (size_t i = 0; i < bitmap.getSize(); i += 4) {
 194     uint32 c = packed_pixels[i >> 2];
 195     buffer_pixels[i] = SkGetPackedR32(c);
 196     buffer_pixels[i + 1] = SkGetPackedG32(c);
 197     buffer_pixels[i + 2] = SkGetPackedB32(c);
 198     buffer_pixels[i + 3] = SkGetPackedA32(c);
 199   }
 200
 201   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 202   result->Set(v8::String::NewFromUtf8(isolate, "width"),
 203               v8::Number::New(isolate, snapped_clip.width()));
 204   result->Set(v8::String::NewFromUtf8(isolate, "height"),
 205               v8::Number::New(isolate, snapped_clip.height()));
 206   result->Set(v8::String::NewFromUtf8(isolate, "data"), buffer.toV8Value());
 207
 208   args->Return(result);
 209 }
 210
 211 void SkiaBenchmarking::GetOps(gin::Arguments* args) {
 212   v8::Isolate* isolate = args->isolate();
 213   if (args->PeekNext().IsEmpty())
 214     return;
 215   v8::Handle<v8::Value> picture_handle;
 216   args->GetNext(&picture_handle);
 217   scoped_refptr<cc::Picture> picture =
 218       ParsePictureHash(isolate, picture_handle);
 219   if (!picture.get())
 220     return;
 221
 222   gfx::Rect bounds = picture->LayerRect();
 223   SkDebugCanvas canvas(bounds.width(), bounds.height());
 224   picture->Replay(&canvas);
 225
 226   v8::Handle<v8::Array> result = v8::Array::New(isolate, canvas.getSize());
 227   for (int i = 0; i < canvas.getSize(); ++i) {
 228     DrawType cmd_type = canvas.getDrawCommandAt(i)->getType();
 229     v8::Handle<v8::Object> cmd = v8::Object::New(isolate);
 230     cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_type"),
 231              v8::Integer::New(isolate, cmd_type));
 232     cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_string"),
 233              v8::String::NewFromUtf8(
 234                  isolate, SkDrawCommand::GetCommandString(cmd_type)));
 235
 236     SkTDArray<SkString*>* info = canvas.getCommandInfo(i);
 237     DCHECK(info);
 238
 239     v8::Local<v8::Array> v8_info = v8::Array::New(isolate, info->count());
 240     for (int j = 0; j < info->count(); ++j) {
 241       const SkString* info_str = (*info)[j];
 242       DCHECK(info_str);
 243       v8_info->Set(j, v8::String::NewFromUtf8(isolate, info_str->c_str()));
 244     }
 245
 246     cmd->Set(v8::String::NewFromUtf8(isolate, "info"), v8_info);
 247
 248     result->Set(i, cmd);
 249   }
 250
 251   args->Return(result.As<v8::Object>());
 252 }
 253
 254 void SkiaBenchmarking::GetOpTimings(gin::Arguments* args) {
 255   v8::Isolate* isolate = args->isolate();
 256   if (args->PeekNext().IsEmpty())
 257     return;
 258   v8::Handle<v8::Value> picture_handle;
 259   args->GetNext(&picture_handle);
 260   scoped_refptr<cc::Picture> picture =
 261       ParsePictureHash(isolate, picture_handle);
 262   if (!picture.get())
 263     return;
 264
 265   gfx::Rect bounds = picture->LayerRect();
 266
 267   // Measure the total time by drawing straight into a bitmap-backed canvas.
 268   skia::RefPtr<SkBaseDevice> device = skia::AdoptRef(SkNEW_ARGS(
 269       SkBitmapDevice,
 270       (SkBitmap::kARGB_8888_Config, bounds.width(), bounds.height())));
 271   SkCanvas bitmap_canvas(device.get());
 272   bitmap_canvas.clear(SK_ColorTRANSPARENT);
 273   base::TimeTicks t0 = base::TimeTicks::HighResNow();
 274   picture->Replay(&bitmap_canvas);
 275   base::TimeDelta total_time = base::TimeTicks::HighResNow() - t0;
 276
 277   // Gather per-op timing info by drawing into a BenchmarkingCanvas.
 278   skia::BenchmarkingCanvas benchmarking_canvas(bounds.width(), bounds.height());
 279   picture->Replay(&benchmarking_canvas);
 280
 281   v8::Local<v8::Array> op_times =
 282       v8::Array::New(isolate, benchmarking_canvas.CommandCount());
 283   for (size_t i = 0; i < benchmarking_canvas.CommandCount(); ++i)
 284     op_times->Set(i, v8::Number::New(isolate, benchmarking_canvas.GetTime(i)));
 285
 286   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 287   result->Set(v8::String::NewFromUtf8(isolate, "total_time"),
 288               v8::Number::New(isolate, total_time.InMillisecondsF()));
 289   result->Set(v8::String::NewFromUtf8(isolate, "cmd_times"), op_times);
 290
 291   args->Return(result);
 292 }
 293
 294 void SkiaBenchmarking::GetInfo(gin::Arguments* args) {
 295   v8::Isolate* isolate = args->isolate();
 296   if (args->PeekNext().IsEmpty())
 297     return;
 298   v8::Handle<v8::Value> picture_handle;
 299   args->GetNext(&picture_handle);
 300   scoped_refptr<cc::Picture> picture =
 301       ParsePictureStr(isolate, picture_handle);
 302   if (!picture.get())
 303     return;
 304
 305   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 306   result->Set(v8::String::NewFromUtf8(isolate, "width"),
 307               v8::Number::New(isolate, picture->LayerRect().width()));
 308   result->Set(v8::String::NewFromUtf8(isolate, "height"),
 309               v8::Number::New(isolate, picture->LayerRect().height()));
 310
 311   args->Return(result);
 312 }
 313
 314 } // namespace content