| // Copyright 2016 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 "modules/csspaint/CSSPaintDefinition.h" |
| |
| #include "bindings/core/v8/ScriptState.h" |
| #include "bindings/core/v8/V8Binding.h" |
| #include "bindings/core/v8/V8BindingMacros.h" |
| #include "bindings/core/v8/V8ObjectConstructor.h" |
| #include "core/css/CSSComputedStyleDeclaration.h" |
| #include "core/css/cssom/FilteredComputedStylePropertyMap.h" |
| #include "core/dom/ExecutionContext.h" |
| #include "core/layout/LayoutObject.h" |
| #include "modules/csspaint/PaintRenderingContext2D.h" |
| #include "modules/csspaint/PaintSize.h" |
| #include "platform/graphics/ImageBuffer.h" |
| #include "platform/graphics/PaintGeneratedImage.h" |
| #include "platform/graphics/RecordingImageBufferSurface.h" |
| #include "wtf/PtrUtil.h" |
| |
| namespace blink { |
| |
| CSSPaintDefinition* CSSPaintDefinition::create(ScriptState* scriptState, v8::Local<v8::Function> constructor, v8::Local<v8::Function> paint, Vector<CSSPropertyID>& nativeInvalidationProperties, Vector<AtomicString>& customInvalidationProperties) |
| { |
| return new CSSPaintDefinition(scriptState, constructor, paint, nativeInvalidationProperties, customInvalidationProperties); |
| } |
| |
| CSSPaintDefinition::CSSPaintDefinition(ScriptState* scriptState, v8::Local<v8::Function> constructor, v8::Local<v8::Function> paint, Vector<CSSPropertyID>& nativeInvalidationProperties, Vector<AtomicString>& customInvalidationProperties) |
| : m_scriptState(scriptState) |
| , m_constructor(scriptState->isolate(), constructor) |
| , m_paint(scriptState->isolate(), paint) |
| { |
| m_nativeInvalidationProperties.swap(nativeInvalidationProperties); |
| m_customInvalidationProperties.swap(customInvalidationProperties); |
| } |
| |
| CSSPaintDefinition::~CSSPaintDefinition() |
| { |
| } |
| |
| PassRefPtr<Image> CSSPaintDefinition::paint(const LayoutObject& layoutObject, const IntSize& size) |
| { |
| ScriptState::Scope scope(m_scriptState.get()); |
| |
| maybeCreatePaintInstance(); |
| |
| v8::Isolate* isolate = m_scriptState->isolate(); |
| v8::Local<v8::Object> instance = m_instance.newLocal(isolate); |
| |
| // We may have failed to create an instance class, in which case produce an |
| // invalid image. |
| if (isUndefinedOrNull(instance)) |
| return nullptr; |
| |
| DCHECK(layoutObject.node()); |
| |
| PaintRenderingContext2D* renderingContext = PaintRenderingContext2D::create( |
| ImageBuffer::create(wrapUnique(new RecordingImageBufferSurface(size)))); |
| PaintSize* paintSize = PaintSize::create(size); |
| StylePropertyMap* styleMap = FilteredComputedStylePropertyMap::create( |
| CSSComputedStyleDeclaration::create(layoutObject.node()), |
| m_nativeInvalidationProperties, m_customInvalidationProperties); |
| |
| v8::Local<v8::Value> argv[] = { |
| toV8(renderingContext, m_scriptState->context()->Global(), isolate), |
| toV8(paintSize, m_scriptState->context()->Global(), isolate), |
| toV8(styleMap, m_scriptState->context()->Global(), isolate) |
| }; |
| |
| v8::Local<v8::Function> paint = m_paint.newLocal(isolate); |
| |
| v8::TryCatch block(isolate); |
| block.SetVerbose(true); |
| |
| V8ScriptRunner::callFunction(paint, m_scriptState->getExecutionContext(), instance, 3, argv, isolate); |
| |
| // The paint function may have produced an error, in which case produce an |
| // invalid image. |
| if (block.HasCaught()) { |
| return nullptr; |
| } |
| |
| return PaintGeneratedImage::create(renderingContext->imageBuffer()->getPicture(), size); |
| } |
| |
| void CSSPaintDefinition::maybeCreatePaintInstance() |
| { |
| if (m_didCallConstructor) |
| return; |
| |
| DCHECK(m_instance.isEmpty()); |
| |
| v8::Isolate* isolate = m_scriptState->isolate(); |
| v8::Local<v8::Function> constructor = m_constructor.newLocal(isolate); |
| DCHECK(!isUndefinedOrNull(constructor)); |
| |
| v8::Local<v8::Object> paintInstance; |
| if (V8ObjectConstructor::newInstance(isolate, constructor).ToLocal(&paintInstance)) { |
| m_instance.set(isolate, paintInstance); |
| } |
| |
| m_didCallConstructor = true; |
| } |
| |
| } // namespace blink |