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/chrome_object_extensions_utils.h"
  14 #include "content/renderer/render_thread_impl.h"
  15 #include "gin/arguments.h"
  16 #include "gin/handle.h"
  17 #include "gin/object_template_builder.h"
  18 #include "skia/ext/benchmarking_canvas.h"
  19 #include "third_party/WebKit/public/platform/WebArrayBuffer.h"
  20 #include "third_party/WebKit/public/web/WebArrayBufferConverter.h"
  21 #include "third_party/WebKit/public/web/WebFrame.h"
  22 #include "third_party/WebKit/public/web/WebKit.h"
  23 #include "third_party/skia/include/core/SkCanvas.h"
  24 #include "third_party/skia/include/core/SkColorPriv.h"
  25 #include "third_party/skia/include/core/SkGraphics.h"
  26 #include "third_party/skia/include/core/SkStream.h"
  27 #include "third_party/skia/src/utils/debugger/SkDebugCanvas.h"
  28 #include "third_party/skia/src/utils/debugger/SkDrawCommand.h"
  29 #include "ui/gfx/rect_conversions.h"
  30 #include "ui/gfx/skia_util.h"
  31 #include "v8/include/v8.h"
  32
  33
  34 namespace content {
  35
  36 namespace {
  37
  38 scoped_ptr<base::Value> ParsePictureArg(v8::Isolate* isolate,
  39                                         v8::Handle<v8::Value> arg) {
  40   scoped_ptr<content::V8ValueConverter> converter(
  41       content::V8ValueConverter::create());
  42   return scoped_ptr<base::Value>(
  43       converter->FromV8Value(arg, isolate->GetCurrentContext()));
  44 }
  45
  46 scoped_refptr<cc::Picture> ParsePictureStr(v8::Isolate* isolate,
  47                                            v8::Handle<v8::Value> arg) {
  48   scoped_ptr<base::Value> picture_value = ParsePictureArg(isolate, arg);
  49   if (!picture_value)
  50     return NULL;
  51   return cc::Picture::CreateFromSkpValue(picture_value.get());
  52 }
  53
  54 scoped_refptr<cc::Picture> ParsePictureHash(v8::Isolate* isolate,
  55                                             v8::Handle<v8::Value> arg) {
  56   scoped_ptr<base::Value> picture_value = ParsePictureArg(isolate, arg);
  57   if (!picture_value)
  58     return NULL;
  59   return cc::Picture::CreateFromValue(picture_value.get());
  60 }
  61
  62 }  // namespace
  63
  64 gin::WrapperInfo SkiaBenchmarking::kWrapperInfo = {gin::kEmbedderNativeGin};
  65
  66 // static
  67 void SkiaBenchmarking::Install(blink::WebFrame* frame) {
  68   v8::Isolate* isolate = blink::mainThreadIsolate();
  69   v8::HandleScope handle_scope(isolate);
  70   v8::Handle<v8::Context> context = frame->mainWorldScriptContext();
  71   if (context.IsEmpty())
  72     return;
  73
  74   v8::Context::Scope context_scope(context);
  75
  76   gin::Handle<SkiaBenchmarking> controller =
  77       gin::CreateHandle(isolate, new SkiaBenchmarking());
  78   if (controller.IsEmpty())
  79     return;
  80
  81   v8::Handle<v8::Object> chrome = GetOrCreateChromeObject(isolate,
  82                                                           context->Global());
  83   chrome->Set(gin::StringToV8(isolate, "skiaBenchmarking"), controller.ToV8());
  84 }
  85
  86 // static
  87 void SkiaBenchmarking::Initialize() {
  88   DCHECK(RenderThreadImpl::current());
  89   // FIXME: remove this after Skia updates SkGraphics::Init() to be
  90   //        thread-safe and idempotent.
  91   static bool skia_initialized = false;
  92   if (!skia_initialized) {
  93     LOG(WARNING) << "Enabling unsafe Skia benchmarking extension.";
  94     SkGraphics::Init();
  95     skia_initialized = true;
  96   }
  97 }
  98
  99 SkiaBenchmarking::SkiaBenchmarking() {
 100   Initialize();
 101 }
 102
 103 SkiaBenchmarking::~SkiaBenchmarking() {}
 104
 105 gin::ObjectTemplateBuilder SkiaBenchmarking::GetObjectTemplateBuilder(
 106     v8::Isolate* isolate) {
 107   return gin::Wrappable<SkiaBenchmarking>::GetObjectTemplateBuilder(isolate)
 108       .SetMethod("rasterize", &SkiaBenchmarking::Rasterize)
 109       .SetMethod("getOps", &SkiaBenchmarking::GetOps)
 110       .SetMethod("getOpTimings", &SkiaBenchmarking::GetOpTimings)
 111       .SetMethod("getInfo", &SkiaBenchmarking::GetInfo);
 112 }
 113
 114 void SkiaBenchmarking::Rasterize(gin::Arguments* args) {
 115   v8::Isolate* isolate = args->isolate();
 116   if (args->PeekNext().IsEmpty())
 117     return;
 118   v8::Handle<v8::Value> picture_handle;
 119   args->GetNext(&picture_handle);
 120   scoped_refptr<cc::Picture> picture =
 121       ParsePictureHash(isolate, picture_handle);
 122   if (!picture.get())
 123     return;
 124
 125   double scale = 1.0;
 126   gfx::Rect clip_rect(picture->LayerRect());
 127   int stop_index = -1;
 128   bool overdraw = false;
 129
 130   v8::Handle<v8::Context> context = isolate->GetCurrentContext();
 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, context));
 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   SkBitmap bitmap;
 157   if (!bitmap.tryAllocN32Pixels(snapped_clip.width(), snapped_clip.height()))
 158     return;
 159   bitmap.eraseARGB(0, 0, 0, 0);
 160
 161   SkCanvas canvas(bitmap);
 162   canvas.translate(SkFloatToScalar(-clip.x()), SkFloatToScalar(-clip.y()));
 163   canvas.clipRect(gfx::RectToSkRect(snapped_clip));
 164   canvas.scale(scale, scale);
 165   canvas.translate(picture->LayerRect().x(), picture->LayerRect().y());
 166
 167   // First, build a debug canvas for the given picture.
 168   SkDebugCanvas debug_canvas(picture->LayerRect().width(),
 169                              picture->LayerRect().height());
 170   picture->Replay(&debug_canvas);
 171
 172   // Raster the requested command subset into the bitmap-backed canvas.
 173   int last_index = debug_canvas.getSize() - 1;
 174   if (last_index >= 0) {
 175     debug_canvas.setOverdrawViz(overdraw);
 176     debug_canvas.drawTo(
 177         &canvas,
 178         stop_index < 0 ? last_index : std::min(last_index, stop_index));
 179   }
 180
 181   blink::WebArrayBuffer buffer =
 182       blink::WebArrayBuffer::create(bitmap.getSize(), 1);
 183   uint32* packed_pixels = reinterpret_cast<uint32*>(bitmap.getPixels());
 184   uint8* buffer_pixels = reinterpret_cast<uint8*>(buffer.data());
 185   // Swizzle from native Skia format to RGBA as we copy out.
 186   for (size_t i = 0; i < bitmap.getSize(); i += 4) {
 187     uint32 c = packed_pixels[i >> 2];
 188     buffer_pixels[i] = SkGetPackedR32(c);
 189     buffer_pixels[i + 1] = SkGetPackedG32(c);
 190     buffer_pixels[i + 2] = SkGetPackedB32(c);
 191     buffer_pixels[i + 3] = SkGetPackedA32(c);
 192   }
 193
 194   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 195   result->Set(v8::String::NewFromUtf8(isolate, "width"),
 196               v8::Number::New(isolate, snapped_clip.width()));
 197   result->Set(v8::String::NewFromUtf8(isolate, "height"),
 198               v8::Number::New(isolate, snapped_clip.height()));
 199   result->Set(v8::String::NewFromUtf8(isolate, "data"),
 200               blink::WebArrayBufferConverter::toV8Value(
 201                   &buffer, context->Global(), isolate));
 202
 203   args->Return(result);
 204 }
 205
 206 void SkiaBenchmarking::GetOps(gin::Arguments* args) {
 207   v8::Isolate* isolate = args->isolate();
 208   if (args->PeekNext().IsEmpty())
 209     return;
 210   v8::Handle<v8::Value> picture_handle;
 211   args->GetNext(&picture_handle);
 212   scoped_refptr<cc::Picture> picture =
 213       ParsePictureHash(isolate, picture_handle);
 214   if (!picture.get())
 215     return;
 216
 217   gfx::Rect bounds = picture->LayerRect();
 218   SkDebugCanvas canvas(bounds.width(), bounds.height());
 219   picture->Replay(&canvas);
 220
 221   v8::Handle<v8::Array> result = v8::Array::New(isolate, canvas.getSize());
 222   for (int i = 0; i < canvas.getSize(); ++i) {
 223     DrawType cmd_type = canvas.getDrawCommandAt(i)->getType();
 224     v8::Handle<v8::Object> cmd = v8::Object::New(isolate);
 225     cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_type"),
 226              v8::Integer::New(isolate, cmd_type));
 227     cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_string"),
 228              v8::String::NewFromUtf8(
 229                  isolate, SkDrawCommand::GetCommandString(cmd_type)));
 230
 231     SkTDArray<SkString*>* info = canvas.getCommandInfo(i);
 232     DCHECK(info);
 233
 234     v8::Local<v8::Array> v8_info = v8::Array::New(isolate, info->count());
 235     for (int j = 0; j < info->count(); ++j) {
 236       const SkString* info_str = (*info)[j];
 237       DCHECK(info_str);
 238       v8_info->Set(j, v8::String::NewFromUtf8(isolate, info_str->c_str()));
 239     }
 240
 241     cmd->Set(v8::String::NewFromUtf8(isolate, "info"), v8_info);
 242
 243     result->Set(i, cmd);
 244   }
 245
 246   args->Return(result.As<v8::Object>());
 247 }
 248
 249 void SkiaBenchmarking::GetOpTimings(gin::Arguments* args) {
 250   v8::Isolate* isolate = args->isolate();
 251   if (args->PeekNext().IsEmpty())
 252     return;
 253   v8::Handle<v8::Value> picture_handle;
 254   args->GetNext(&picture_handle);
 255   scoped_refptr<cc::Picture> picture =
 256       ParsePictureHash(isolate, picture_handle);
 257   if (!picture.get())
 258     return;
 259
 260   gfx::Rect bounds = picture->LayerRect();
 261
 262   // Measure the total time by drawing straight into a bitmap-backed canvas.
 263   SkBitmap bitmap;
 264   bitmap.allocN32Pixels(bounds.width(), bounds.height());
 265   SkCanvas bitmap_canvas(bitmap);
 266   bitmap_canvas.clear(SK_ColorTRANSPARENT);
 267   base::TimeTicks t0 = base::TimeTicks::HighResNow();
 268   picture->Replay(&bitmap_canvas);
 269   base::TimeDelta total_time = base::TimeTicks::HighResNow() - t0;
 270
 271   // Gather per-op timing info by drawing into a BenchmarkingCanvas.
 272   skia::BenchmarkingCanvas benchmarking_canvas(bounds.width(), bounds.height());
 273   picture->Replay(&benchmarking_canvas);
 274
 275   v8::Local<v8::Array> op_times =
 276       v8::Array::New(isolate, benchmarking_canvas.CommandCount());
 277   for (size_t i = 0; i < benchmarking_canvas.CommandCount(); ++i)
 278     op_times->Set(i, v8::Number::New(isolate, benchmarking_canvas.GetTime(i)));
 279
 280   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 281   result->Set(v8::String::NewFromUtf8(isolate, "total_time"),
 282               v8::Number::New(isolate, total_time.InMillisecondsF()));
 283   result->Set(v8::String::NewFromUtf8(isolate, "cmd_times"), op_times);
 284
 285   args->Return(result);
 286 }
 287
 288 void SkiaBenchmarking::GetInfo(gin::Arguments* args) {
 289   v8::Isolate* isolate = args->isolate();
 290   if (args->PeekNext().IsEmpty())
 291     return;
 292   v8::Handle<v8::Value> picture_handle;
 293   args->GetNext(&picture_handle);
 294   scoped_refptr<cc::Picture> picture =
 295       ParsePictureStr(isolate, picture_handle);
 296   if (!picture.get())
 297     return;
 298
 299   v8::Handle<v8::Object> result = v8::Object::New(isolate);
 300   result->Set(v8::String::NewFromUtf8(isolate, "width"),
 301               v8::Number::New(isolate, picture->LayerRect().width()));
 302   result->Set(v8::String::NewFromUtf8(isolate, "height"),
 303               v8::Number::New(isolate, picture->LayerRect().height()));
 304
 305   args->Return(result);
 306 }
 307
 308 } // namespace content