1/* 2 * Copyright (C) 2007-2009 Google Inc. All rights reserved. 3 * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include "config.h" 33#include "V8HTMLCanvasElement.h" 34 35#include "V8CanvasRenderingContext2D.h" 36#include "V8Node.h" 37#include "V8WebGLRenderingContext.h" 38#include "bindings/v8/ExceptionState.h" 39#include "bindings/v8/ScriptState.h" 40#include "bindings/v8/V8Binding.h" 41#include "core/html/HTMLCanvasElement.h" 42#include "core/html/canvas/Canvas2DContextAttributes.h" 43#include "core/html/canvas/CanvasRenderingContext.h" 44#include "core/html/canvas/WebGLContextAttributes.h" 45#include "core/inspector/InspectorCanvasInstrumentation.h" 46#include "wtf/MathExtras.h" 47#include "wtf/text/WTFString.h" 48 49namespace WebCore { 50 51void V8HTMLCanvasElement::getContextMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info) 52{ 53 v8::Handle<v8::Object> holder = info.Holder(); 54 v8::Isolate* isolate = info.GetIsolate(); 55 HTMLCanvasElement* imp = V8HTMLCanvasElement::toNative(holder); 56 V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, contextIdResource, info[0]); 57 String contextId = contextIdResource; 58 RefPtr<CanvasContextAttributes> attributes; 59 if (contextId == "webgl" || contextId == "experimental-webgl" || contextId == "webkit-3d") { 60 RefPtr<WebGLContextAttributes> webGLAttributes = WebGLContextAttributes::create(); 61 if (info.Length() > 1 && info[1]->IsObject()) { 62 v8::Handle<v8::Object> jsAttributes = info[1]->ToObject(); 63 v8::Handle<v8::String> alpha = v8AtomicString(isolate, "alpha"); 64 if (jsAttributes->Has(alpha)) 65 webGLAttributes->setAlpha(jsAttributes->Get(alpha)->BooleanValue()); 66 v8::Handle<v8::String> depth = v8AtomicString(isolate, "depth"); 67 if (jsAttributes->Has(depth)) 68 webGLAttributes->setDepth(jsAttributes->Get(depth)->BooleanValue()); 69 v8::Handle<v8::String> stencil = v8AtomicString(isolate, "stencil"); 70 if (jsAttributes->Has(stencil)) 71 webGLAttributes->setStencil(jsAttributes->Get(stencil)->BooleanValue()); 72 v8::Handle<v8::String> antialias = v8AtomicString(isolate, "antialias"); 73 if (jsAttributes->Has(antialias)) 74 webGLAttributes->setAntialias(jsAttributes->Get(antialias)->BooleanValue()); 75 v8::Handle<v8::String> premultipliedAlpha = v8AtomicString(isolate, "premultipliedAlpha"); 76 if (jsAttributes->Has(premultipliedAlpha)) 77 webGLAttributes->setPremultipliedAlpha(jsAttributes->Get(premultipliedAlpha)->BooleanValue()); 78 v8::Handle<v8::String> preserveDrawingBuffer = v8AtomicString(isolate, "preserveDrawingBuffer"); 79 if (jsAttributes->Has(preserveDrawingBuffer)) 80 webGLAttributes->setPreserveDrawingBuffer(jsAttributes->Get(preserveDrawingBuffer)->BooleanValue()); 81 v8::Handle<v8::String> failIfMajorPerformanceCaveat = v8AtomicString(isolate, "failIfMajorPerformanceCaveat"); 82 if (jsAttributes->Has(failIfMajorPerformanceCaveat)) 83 webGLAttributes->setFailIfMajorPerformanceCaveat(jsAttributes->Get(failIfMajorPerformanceCaveat)->BooleanValue()); 84 } 85 attributes = webGLAttributes; 86 } else { 87 RefPtr<Canvas2DContextAttributes> canvas2DAttributes = Canvas2DContextAttributes::create(); 88 if (info.Length() > 1 && info[1]->IsObject()) { 89 v8::Handle<v8::Object> jsAttributes = info[1]->ToObject(); 90 v8::Handle<v8::String> alpha = v8AtomicString(isolate, "alpha"); 91 if (jsAttributes->Has(alpha)) 92 canvas2DAttributes->setAlpha(jsAttributes->Get(alpha)->BooleanValue()); 93 } 94 attributes = canvas2DAttributes; 95 } 96 CanvasRenderingContext* result = imp->getContext(contextId, attributes.get()); 97 if (!result) { 98 v8SetReturnValueNull(info); 99 return; 100 } 101 if (result->is2d()) { 102 v8::Handle<v8::Value> v8Result = toV8(toCanvasRenderingContext2D(result), info.Holder(), info.GetIsolate()); 103 if (InspectorInstrumentation::canvasAgentEnabled(&imp->document())) { 104 ScriptState* scriptState = ScriptState::forContext(isolate->GetCurrentContext()); 105 ScriptObject context(scriptState, v8::Handle<v8::Object>::Cast(v8Result)); 106 ScriptObject wrapped = InspectorInstrumentation::wrapCanvas2DRenderingContextForInstrumentation(&imp->document(), context); 107 if (!wrapped.hasNoValue()) { 108 v8SetReturnValue(info, wrapped.v8Value()); 109 return; 110 } 111 } 112 v8SetReturnValue(info, v8Result); 113 return; 114 } 115 if (result->is3d()) { 116 v8::Handle<v8::Value> v8Result = toV8(toWebGLRenderingContext(result), info.Holder(), info.GetIsolate()); 117 if (InspectorInstrumentation::canvasAgentEnabled(&imp->document())) { 118 ScriptState* scriptState = ScriptState::forContext(isolate->GetCurrentContext()); 119 ScriptObject glContext(scriptState, v8::Handle<v8::Object>::Cast(v8Result)); 120 ScriptObject wrapped = InspectorInstrumentation::wrapWebGLRenderingContextForInstrumentation(&imp->document(), glContext); 121 if (!wrapped.hasNoValue()) { 122 v8SetReturnValue(info, wrapped.v8Value()); 123 return; 124 } 125 } 126 v8SetReturnValue(info, v8Result); 127 return; 128 } 129 ASSERT_NOT_REACHED(); 130 v8SetReturnValueNull(info); 131} 132 133void V8HTMLCanvasElement::toDataURLMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info) 134{ 135 v8::Handle<v8::Object> holder = info.Holder(); 136 HTMLCanvasElement* canvas = V8HTMLCanvasElement::toNative(holder); 137 ExceptionState exceptionState(ExceptionState::ExecutionContext, "toDataURL", "HTMLCanvasElement", info.Holder(), info.GetIsolate()); 138 139 V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(V8StringResource<>, type, info[0]); 140 double quality; 141 double* qualityPtr = 0; 142 if (info.Length() > 1 && info[1]->IsNumber()) { 143 quality = info[1]->NumberValue(); 144 qualityPtr = &quality; 145 } 146 147 String result = canvas->toDataURL(type, qualityPtr, exceptionState); 148 exceptionState.throwIfNeeded(); 149 v8SetReturnValueStringOrUndefined(info, result, info.GetIsolate()); 150} 151 152} // namespace WebCore 153