// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/skia_benchmarking_extension.h"
#include "base/base64.h"
#include "base/time/time.h"
#include "base/values.h"
#include "cc/base/math_util.h"
#include "cc/resources/picture.h"
#include "content/public/renderer/v8_value_converter.h"
#include "content/renderer/render_thread_impl.h"
#include "gin/arguments.h"
#include "gin/handle.h"
#include "gin/object_template_builder.h"
#include "skia/ext/benchmarking_canvas.h"
#include "third_party/WebKit/public/platform/WebArrayBuffer.h"
#include "third_party/WebKit/public/web/WebArrayBufferConverter.h"
#include "third_party/WebKit/public/web/WebFrame.h"
#include "third_party/WebKit/public/web/WebKit.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColorPriv.h"
#include "third_party/skia/include/core/SkGraphics.h"
#include "third_party/skia/include/core/SkStream.h"
#include "third_party/skia/src/utils/debugger/SkDebugCanvas.h"
#include "third_party/skia/src/utils/debugger/SkDrawCommand.h"
#include "ui/gfx/rect_conversions.h"
#include "ui/gfx/skia_util.h"
#include "v8/include/v8.h"
namespace content {
namespace {
scoped_ptr<base::Value> ParsePictureArg(v8::Isolate* isolate,
v8::Handle<v8::Value> arg) {
scoped_ptr<content::V8ValueConverter> converter(
content::V8ValueConverter::create());
return scoped_ptr<base::Value>(
converter->FromV8Value(arg, isolate->GetCurrentContext()));
}
scoped_refptr<cc::Picture> ParsePictureStr(v8::Isolate* isolate,
v8::Handle<v8::Value> arg) {
scoped_ptr<base::Value> picture_value = ParsePictureArg(isolate, arg);
if (!picture_value)
return NULL;
return cc::Picture::CreateFromSkpValue(picture_value.get());
}
scoped_refptr<cc::Picture> ParsePictureHash(v8::Isolate* isolate,
v8::Handle<v8::Value> arg) {
scoped_ptr<base::Value> picture_value = ParsePictureArg(isolate, arg);
if (!picture_value)
return NULL;
return cc::Picture::CreateFromValue(picture_value.get());
}
} // namespace
gin::WrapperInfo SkiaBenchmarking::kWrapperInfo = {gin::kEmbedderNativeGin};
// static
void SkiaBenchmarking::Install(blink::WebFrame* frame) {
v8::Isolate* isolate = blink::mainThreadIsolate();
v8::HandleScope handle_scope(isolate);
v8::Handle<v8::Context> context = frame->mainWorldScriptContext();
if (context.IsEmpty())
return;
v8::Context::Scope context_scope(context);
gin::Handle<SkiaBenchmarking> controller =
gin::CreateHandle(isolate, new SkiaBenchmarking());
if (controller.IsEmpty())
return;
v8::Handle<v8::Object> global = context->Global();
v8::Handle<v8::Object> chrome =
global->Get(gin::StringToV8(isolate, "chrome"))->ToObject();
if (chrome.IsEmpty()) {
chrome = v8::Object::New(isolate);
global->Set(gin::StringToV8(isolate, "chrome"), chrome);
}
chrome->Set(gin::StringToV8(isolate, "skiaBenchmarking"), controller.ToV8());
}
// static
void SkiaBenchmarking::Initialize() {
DCHECK(RenderThreadImpl::current());
// FIXME: remove this after Skia updates SkGraphics::Init() to be
// thread-safe and idempotent.
static bool skia_initialized = false;
if (!skia_initialized) {
LOG(WARNING) << "Enabling unsafe Skia benchmarking extension.";
SkGraphics::Init();
skia_initialized = true;
}
}
SkiaBenchmarking::SkiaBenchmarking() {
Initialize();
}
SkiaBenchmarking::~SkiaBenchmarking() {}
gin::ObjectTemplateBuilder SkiaBenchmarking::GetObjectTemplateBuilder(
v8::Isolate* isolate) {
return gin::Wrappable<SkiaBenchmarking>::GetObjectTemplateBuilder(isolate)
.SetMethod("rasterize", &SkiaBenchmarking::Rasterize)
.SetMethod("getOps", &SkiaBenchmarking::GetOps)
.SetMethod("getOpTimings", &SkiaBenchmarking::GetOpTimings)
.SetMethod("getInfo", &SkiaBenchmarking::GetInfo);
}
void SkiaBenchmarking::Rasterize(gin::Arguments* args) {
v8::Isolate* isolate = args->isolate();
if (args->PeekNext().IsEmpty())
return;
v8::Handle<v8::Value> picture_handle;
args->GetNext(&picture_handle);
scoped_refptr<cc::Picture> picture =
ParsePictureHash(isolate, picture_handle);
if (!picture.get())
return;
double scale = 1.0;
gfx::Rect clip_rect(picture->LayerRect());
int stop_index = -1;
bool overdraw = false;
v8::Handle<v8::Context> context = isolate->GetCurrentContext();
if (!args->PeekNext().IsEmpty()) {
v8::Handle<v8::Value> params;
args->GetNext(¶ms);
scoped_ptr<content::V8ValueConverter> converter(
content::V8ValueConverter::create());
scoped_ptr<base::Value> params_value(
converter->FromV8Value(params, context));
const base::DictionaryValue* params_dict = NULL;
if (params_value.get() && params_value->GetAsDictionary(¶ms_dict)) {
params_dict->GetDouble("scale", &scale);
params_dict->GetInteger("stop", &stop_index);
params_dict->GetBoolean("overdraw", &overdraw);
const base::Value* clip_value = NULL;
if (params_dict->Get("clip", &clip_value))
cc::MathUtil::FromValue(clip_value, &clip_rect);
}
}
gfx::RectF clip(clip_rect);
clip.Intersect(picture->LayerRect());
clip.Scale(scale);
gfx::Rect snapped_clip = gfx::ToEnclosingRect(clip);
SkBitmap bitmap;
if (!bitmap.tryAllocN32Pixels(snapped_clip.width(), snapped_clip.height()))
return;
bitmap.eraseARGB(0, 0, 0, 0);
SkCanvas canvas(bitmap);
canvas.translate(SkFloatToScalar(-clip.x()), SkFloatToScalar(-clip.y()));
canvas.clipRect(gfx::RectToSkRect(snapped_clip));
canvas.scale(scale, scale);
canvas.translate(picture->LayerRect().x(), picture->LayerRect().y());
// First, build a debug canvas for the given picture.
SkDebugCanvas debug_canvas(picture->LayerRect().width(),
picture->LayerRect().height());
picture->Replay(&debug_canvas);
// Raster the requested command subset into the bitmap-backed canvas.
int last_index = debug_canvas.getSize() - 1;
if (last_index >= 0) {
debug_canvas.setOverdrawViz(overdraw);
debug_canvas.drawTo(
&canvas,
stop_index < 0 ? last_index : std::min(last_index, stop_index));
}
blink::WebArrayBuffer buffer =
blink::WebArrayBuffer::create(bitmap.getSize(), 1);
uint32* packed_pixels = reinterpret_cast<uint32*>(bitmap.getPixels());
uint8* buffer_pixels = reinterpret_cast<uint8*>(buffer.data());
// Swizzle from native Skia format to RGBA as we copy out.
for (size_t i = 0; i < bitmap.getSize(); i += 4) {
uint32 c = packed_pixels[i >> 2];
buffer_pixels[i] = SkGetPackedR32(c);
buffer_pixels[i + 1] = SkGetPackedG32(c);
buffer_pixels[i + 2] = SkGetPackedB32(c);
buffer_pixels[i + 3] = SkGetPackedA32(c);
}
v8::Handle<v8::Object> result = v8::Object::New(isolate);
result->Set(v8::String::NewFromUtf8(isolate, "width"),
v8::Number::New(isolate, snapped_clip.width()));
result->Set(v8::String::NewFromUtf8(isolate, "height"),
v8::Number::New(isolate, snapped_clip.height()));
result->Set(v8::String::NewFromUtf8(isolate, "data"),
blink::WebArrayBufferConverter::toV8Value(
&buffer, context->Global(), isolate));
args->Return(result);
}
void SkiaBenchmarking::GetOps(gin::Arguments* args) {
v8::Isolate* isolate = args->isolate();
if (args->PeekNext().IsEmpty())
return;
v8::Handle<v8::Value> picture_handle;
args->GetNext(&picture_handle);
scoped_refptr<cc::Picture> picture =
ParsePictureHash(isolate, picture_handle);
if (!picture.get())
return;
gfx::Rect bounds = picture->LayerRect();
SkDebugCanvas canvas(bounds.width(), bounds.height());
picture->Replay(&canvas);
v8::Handle<v8::Array> result = v8::Array::New(isolate, canvas.getSize());
for (int i = 0; i < canvas.getSize(); ++i) {
DrawType cmd_type = canvas.getDrawCommandAt(i)->getType();
v8::Handle<v8::Object> cmd = v8::Object::New(isolate);
cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_type"),
v8::Integer::New(isolate, cmd_type));
cmd->Set(v8::String::NewFromUtf8(isolate, "cmd_string"),
v8::String::NewFromUtf8(
isolate, SkDrawCommand::GetCommandString(cmd_type)));
SkTDArray<SkString*>* info = canvas.getCommandInfo(i);
DCHECK(info);
v8::Local<v8::Array> v8_info = v8::Array::New(isolate, info->count());
for (int j = 0; j < info->count(); ++j) {
const SkString* info_str = (*info)[j];
DCHECK(info_str);
v8_info->Set(j, v8::String::NewFromUtf8(isolate, info_str->c_str()));
}
cmd->Set(v8::String::NewFromUtf8(isolate, "info"), v8_info);
result->Set(i, cmd);
}
args->Return(result.As<v8::Object>());
}
void SkiaBenchmarking::GetOpTimings(gin::Arguments* args) {
v8::Isolate* isolate = args->isolate();
if (args->PeekNext().IsEmpty())
return;
v8::Handle<v8::Value> picture_handle;
args->GetNext(&picture_handle);
scoped_refptr<cc::Picture> picture =
ParsePictureHash(isolate, picture_handle);
if (!picture.get())
return;
gfx::Rect bounds = picture->LayerRect();
// Measure the total time by drawing straight into a bitmap-backed canvas.
SkBitmap bitmap;
bitmap.allocN32Pixels(bounds.width(), bounds.height());
SkCanvas bitmap_canvas(bitmap);
bitmap_canvas.clear(SK_ColorTRANSPARENT);
base::TimeTicks t0 = base::TimeTicks::HighResNow();
picture->Replay(&bitmap_canvas);
base::TimeDelta total_time = base::TimeTicks::HighResNow() - t0;
// Gather per-op timing info by drawing into a BenchmarkingCanvas.
skia::BenchmarkingCanvas benchmarking_canvas(bounds.width(), bounds.height());
picture->Replay(&benchmarking_canvas);
v8::Local<v8::Array> op_times =
v8::Array::New(isolate, benchmarking_canvas.CommandCount());
for (size_t i = 0; i < benchmarking_canvas.CommandCount(); ++i)
op_times->Set(i, v8::Number::New(isolate, benchmarking_canvas.GetTime(i)));
v8::Handle<v8::Object> result = v8::Object::New(isolate);
result->Set(v8::String::NewFromUtf8(isolate, "total_time"),
v8::Number::New(isolate, total_time.InMillisecondsF()));
result->Set(v8::String::NewFromUtf8(isolate, "cmd_times"), op_times);
args->Return(result);
}
void SkiaBenchmarking::GetInfo(gin::Arguments* args) {
v8::Isolate* isolate = args->isolate();
if (args->PeekNext().IsEmpty())
return;
v8::Handle<v8::Value> picture_handle;
args->GetNext(&picture_handle);
scoped_refptr<cc::Picture> picture =
ParsePictureStr(isolate, picture_handle);
if (!picture.get())
return;
v8::Handle<v8::Object> result = v8::Object::New(isolate);
result->Set(v8::String::NewFromUtf8(isolate, "width"),
v8::Number::New(isolate, picture->LayerRect().width()));
result->Set(v8::String::NewFromUtf8(isolate, "height"),
v8::Number::New(isolate, picture->LayerRect().height()));
args->Return(result);
}
} // namespace content