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/WebArrayBufferConverter.h"
  20 #include "third_party/WebKit/public/web/WebFrame.h"
  21 #include "third_party/WebKit/public/web/WebKit.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   if (controller.IsEmpty())
  78     return;
  79
  80   v8::Handle<v8::Object> global = context->Global();
  81   v8::Handle<v8::Object> chrome =
  82       global->Get(gin::StringToV8(isolate, "chrome"))->ToObject();
  83   if (chrome.IsEmpty()) {
  84     chrome = v8::Object::New(isolate);
  85     global->Set(gin::StringToV8(isolate, "chrome"), chrome);
  86   }
  87   chrome->Set(gin::StringToV8(isolate, "skiaBenchmarking"), controller.ToV8());
  88 }
  89
  90 // static
  91 void SkiaBenchmarking::Initialize() {
  92   DCHECK(RenderThreadImpl::current());
  93   // FIXME: remove this after Skia updates SkGraphics::Init() to be
  94   //        thread-safe and idempotent.
  95   static bool skia_initialized = false;
  96   if (!skia_initialized) {
  97     LOG(WARNING) << "Enabling unsafe Skia benchmarking extension.";
  98     SkGraphics::Init();
  99     skia_initialized = true;
 100   }
 101 }
 102
 103 SkiaBenchmarking::SkiaBenchmarking() {
 104   Initialize();
 105 }
 106
 107 SkiaBenchmarking::~SkiaBenchmarking() {}
 108
 109 gin::ObjectTemplateBuilder SkiaBenchmarking::GetObjectTemplateBuilder(
 110     v8::Isolate* isolate) {
 111   return gin::Wrappable<SkiaBenchmarking>::GetObjectTemplateBuilder(isolate)
 112       .SetMethod("rasterize", &SkiaBenchmarking::Rasterize)
 113       .SetMethod("getOps", &SkiaBenchmarking::GetOps)
 114       .SetMethod("getOpTimings", &SkiaBenchmarking::GetOpTimings)
 115       .SetMethod("getInfo", &SkiaBenchmarking::GetInfo);
 116 }
 117
 118 void SkiaBenchmarking::Rasterize(gin::Arguments* args) {
 119   v8::Isolate* isolate = args->isolate();
 120   if (args->PeekNext().IsEmpty())
 121     return;
 122   v8::Handle<v8::Value> picture_handle;
 123   args->GetNext(&picture_handle);
 124   scoped_refptr<cc::Picture> picture =
 125       ParsePictureHash(isolate, picture_handle);
 126   if (!picture.get())
 127     return;
 128
 129   double scale = 1.0;
 130   gfx::Rect clip_rect(picture->LayerRect());
 131   int stop_index = -1;
 132   bool overdraw = false;
 133
 134   v8::Handle<v8::Context> context = isolate->GetCurrentContext();
 135   if (!args->PeekNext().IsEmpty()) {
 136     v8::Handle<v8::Value> params;
 137     args->GetNext(&params);
 138     scoped_ptr<content::V8ValueConverter> converter(
 139         content::V8ValueConverter::create());
 140     scoped_ptr<base::Value> params_value(
 141         converter->FromV8Value(params, context));
 142
 143     const base::DictionaryValue* params_dict = NULL;
 144     if (params_value.get() && params_value->GetAsDictionary(&params_dict)) {
 145       params_dict->GetDouble("scale", &scale);
 146       params_dict->GetInteger("stop", &stop_index);
 147       params_dict->GetBoolean("overdraw", &overdraw);
 148
 149       const base::Value* clip_value = NULL;
 150       if (params_dict->Get("clip", &clip_value))
 151         cc::MathUtil::FromValue(clip_value, &clip_rect);
 152     }
 153   }
 154
 155   gfx::RectF clip(clip_rect);
 156   clip.Intersect(picture->LayerRect());
 157   clip.Scale(scale);
 158   gfx::Rect snapped_clip = gfx::ToEnclosingRect(clip);
 159
 160   SkBitmap bitmap;
 161   if (!bitmap.allocN32Pixels(snapped_clip.width(), snapped_clip.height()))
 162     return;
 163   bitmap.eraseARGB(0, 0, 0, 0);
 164
 165   SkCanvas canvas(bitmap);
 166   canvas.translate(SkFloatToScalar(-clip.x()), SkFloatToScalar(-clip.y()));
 167   canvas.clipRect(gfx::RectToSkRect(snapped_clip));
 168   canvas.scale(scale, scale);
 169   canvas.translate(picture->LayerRect().x(), picture->LayerRect().y());
 170
 171   // First, build a debug canvas for the given picture.
 172   SkDebugCanvas debug_canvas(picture->LayerRect().width(),
 173                              picture->LayerRect().height());
 174   picture->Replay(&debug_canvas);
 175
 176   // Raster the requested command subset into the bitmap-backed canvas.
 177   int last_index = debug_canvas.getSize() - 1;
 178   if (last_index >= 0) {
 179     debug_canvas.setOverdrawViz(overdraw);
 180     debug_canvas.drawTo(
 181         &canvas,
 182         stop_index < 0 ? last_index : std::min(last_index, stop_index));
 183   }
 184
 185   blink::WebArrayBuffer buffer =
 186       blink::WebArrayBuffer::create(bitmap.getSize(), 1);
 187   uint32* packed_pixels = reinterpret_cast<uint32*>(bitmap.getPixels());
 188   uint8* buffer_pixels = reinterpret_cast<uint8*>(buffer.data());
 189   // Swizzle from native Skia format to RGBA as we copy out.
 190   for (size_t i = 0; i < bitmap.getSize(); i += 4) {
 191     uint32 c = packed_pixels[i >> 2];
 192     buffer_pixels[i] = SkGetPackedR32(c);
 193     buffer_pixels[i + 1] = SkGetPackedG32(c);
 194     buffer_pixels[i + 2] = SkGetPackedB32(c);
 195     buffer_pixels[i + 3] = SkGetPackedA32(c);
 196   }
 197
 198   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 199   result->Set(v8::String::NewFromUtf8(isolate, "width"),
 200               v8::Number::New(isolate, snapped_clip.width()));
 201   result->Set(v8::String::NewFromUtf8(isolate, "height"),
 202               v8::Number::New(isolate, snapped_clip.height()));
 203   result->Set(v8::String::NewFromUtf8(isolate, "data"),
 204               blink::WebArrayBufferConverter::toV8Value(
 205                   &buffer, context->Global(), isolate));
 206
 207   args->Return(result);
 208 }
 209
 210 void SkiaBenchmarking::GetOps(gin::Arguments* args) {
 211   v8::Isolate* isolate = args->isolate();
 212   if (args->PeekNext().IsEmpty())
 213     return;
 214   v8::Handle<v8::Value> picture_handle;
 215   args->GetNext(&picture_handle);
 216   scoped_refptr<cc::Picture> picture =
 217       ParsePictureHash(isolate, picture_handle);
 218   if (!picture.get())
 219     return;
 220
 221   gfx::Rect bounds = picture->LayerRect();
 222   SkDebugCanvas canvas(bounds.width(), bounds.height());
 223   picture->Replay(&canvas);
 224
 225   v8::Handle<v8::Array> result = v8::Array::New(isolate, canvas.getSize());
 226   for (int i = 0; i < canvas.getSize(); ++i) {
 227     DrawType cmd_type = canvas.getDrawCommandAt(i)->getType();
 228     v8::Handle<v8::Object> cmd = v8::Object::New(isolate);
 229     cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_type"),
 230              v8::Integer::New(isolate, cmd_type));
 231     cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_string"),
 232              v8::String::NewFromUtf8(
 233                  isolate, SkDrawCommand::GetCommandString(cmd_type)));
 234
 235     SkTDArray<SkString*>* info = canvas.getCommandInfo(i);
 236     DCHECK(info);
 237
 238     v8::Local<v8::Array> v8_info = v8::Array::New(isolate, info->count());
 239     for (int j = 0; j < info->count(); ++j) {
 240       const SkString* info_str = (*info)[j];
 241       DCHECK(info_str);
 242       v8_info->Set(j, v8::String::NewFromUtf8(isolate, info_str->c_str()));
 243     }
 244
 245     cmd->Set(v8::String::NewFromUtf8(isolate, "info"), v8_info);
 246
 247     result->Set(i, cmd);
 248   }
 249
 250   args->Return(result.As<v8::Object>());
 251 }
 252
 253 void SkiaBenchmarking::GetOpTimings(gin::Arguments* args) {
 254   v8::Isolate* isolate = args->isolate();
 255   if (args->PeekNext().IsEmpty())
 256     return;
 257   v8::Handle<v8::Value> picture_handle;
 258   args->GetNext(&picture_handle);
 259   scoped_refptr<cc::Picture> picture =
 260       ParsePictureHash(isolate, picture_handle);
 261   if (!picture.get())
 262     return;
 263
 264   gfx::Rect bounds = picture->LayerRect();
 265
 266   // Measure the total time by drawing straight into a bitmap-backed canvas.
 267   SkBitmap bitmap;
 268   bitmap.allocN32Pixels(bounds.width(), bounds.height());
 269   SkCanvas bitmap_canvas(bitmap);
 270   bitmap_canvas.clear(SK_ColorTRANSPARENT);
 271   base::TimeTicks t0 = base::TimeTicks::HighResNow();
 272   picture->Replay(&bitmap_canvas);
 273   base::TimeDelta total_time = base::TimeTicks::HighResNow() - t0;
 274
 275   // Gather per-op timing info by drawing into a BenchmarkingCanvas.
 276   skia::BenchmarkingCanvas benchmarking_canvas(bounds.width(), bounds.height());
 277   picture->Replay(&benchmarking_canvas);
 278
 279   v8::Local<v8::Array> op_times =
 280       v8::Array::New(isolate, benchmarking_canvas.CommandCount());
 281   for (size_t i = 0; i < benchmarking_canvas.CommandCount(); ++i)
 282     op_times->Set(i, v8::Number::New(isolate, benchmarking_canvas.GetTime(i)));
 283
 284   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 285   result->Set(v8::String::NewFromUtf8(isolate, "total_time"),
 286               v8::Number::New(isolate, total_time.InMillisecondsF()));
 287   result->Set(v8::String::NewFromUtf8(isolate, "cmd_times"), op_times);
 288
 289   args->Return(result);
 290 }
 291
 292 void SkiaBenchmarking::GetInfo(gin::Arguments* args) {
 293   v8::Isolate* isolate = args->isolate();
 294   if (args->PeekNext().IsEmpty())
 295     return;
 296   v8::Handle<v8::Value> picture_handle;
 297   args->GetNext(&picture_handle);
 298   scoped_refptr<cc::Picture> picture =
 299       ParsePictureStr(isolate, picture_handle);
 300   if (!picture.get())
 301     return;
 302
 303   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 304   result->Set(v8::String::NewFromUtf8(isolate, "width"),
 305               v8::Number::New(isolate, picture->LayerRect().width()));
 306   result->Set(v8::String::NewFromUtf8(isolate, "height"),
 307               v8::Number::New(isolate, picture->LayerRect().height()));
 308
 309   args->Return(result);
 310 }
 311
 312 } // namespace content