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 "CanvasContextAttributes.h" 36#include "CanvasRenderingContext.h" 37#include "HTMLCanvasElement.h" 38#include "PlatformString.h" 39#include "WebGLContextAttributes.h" 40#include "V8Binding.h" 41#include "V8CanvasRenderingContext2D.h" 42#include "V8Node.h" 43#include "V8Proxy.h" 44#if ENABLE(WEBGL) 45#include "V8WebGLRenderingContext.h" 46#endif 47#include <wtf/MathExtras.h> 48 49namespace WebCore { 50 51v8::Handle<v8::Value> V8HTMLCanvasElement::getContextCallback(const v8::Arguments& args) 52{ 53 INC_STATS("DOM.HTMLCanvasElement.context"); 54 v8::Handle<v8::Object> holder = args.Holder(); 55 HTMLCanvasElement* imp = V8HTMLCanvasElement::toNative(holder); 56 String contextId = toWebCoreString(args[0]); 57 RefPtr<CanvasContextAttributes> attrs; 58#if ENABLE(WEBGL) 59 if (contextId == "experimental-webgl" || contextId == "webkit-3d") { 60 attrs = WebGLContextAttributes::create(); 61 WebGLContextAttributes* webGLAttrs = static_cast<WebGLContextAttributes*>(attrs.get()); 62 if (args.Length() > 1 && args[1]->IsObject()) { 63 v8::Handle<v8::Object> jsAttrs = args[1]->ToObject(); 64 v8::Handle<v8::String> alpha = v8::String::New("alpha"); 65 if (jsAttrs->Has(alpha)) 66 webGLAttrs->setAlpha(jsAttrs->Get(alpha)->BooleanValue()); 67 v8::Handle<v8::String> depth = v8::String::New("depth"); 68 if (jsAttrs->Has(depth)) 69 webGLAttrs->setDepth(jsAttrs->Get(depth)->BooleanValue()); 70 v8::Handle<v8::String> stencil = v8::String::New("stencil"); 71 if (jsAttrs->Has(stencil)) 72 webGLAttrs->setStencil(jsAttrs->Get(stencil)->BooleanValue()); 73 v8::Handle<v8::String> antialias = v8::String::New("antialias"); 74 if (jsAttrs->Has(antialias)) 75 webGLAttrs->setAntialias(jsAttrs->Get(antialias)->BooleanValue()); 76 v8::Handle<v8::String> premultipliedAlpha = v8::String::New("premultipliedAlpha"); 77 if (jsAttrs->Has(premultipliedAlpha)) 78 webGLAttrs->setPremultipliedAlpha(jsAttrs->Get(premultipliedAlpha)->BooleanValue()); 79 v8::Handle<v8::String> preserveDrawingBuffer = v8::String::New("preserveDrawingBuffer"); 80 if (jsAttrs->Has(preserveDrawingBuffer)) 81 webGLAttrs->setPreserveDrawingBuffer(jsAttrs->Get(preserveDrawingBuffer)->BooleanValue()); 82 } 83 } 84#endif 85 CanvasRenderingContext* result = imp->getContext(contextId, attrs.get()); 86 if (!result) 87 return v8::Null(); 88 if (result->is2d()) 89 return toV8(static_cast<CanvasRenderingContext2D*>(result)); 90#if ENABLE(WEBGL) 91 else if (result->is3d()) 92 return toV8(static_cast<WebGLRenderingContext*>(result)); 93#endif 94 ASSERT_NOT_REACHED(); 95 return v8::Null(); 96} 97 98v8::Handle<v8::Value> V8HTMLCanvasElement::toDataURLCallback(const v8::Arguments& args) 99{ 100 v8::Handle<v8::Object> holder = args.Holder(); 101 HTMLCanvasElement* canvas = V8HTMLCanvasElement::toNative(holder); 102 ExceptionCode ec = 0; 103 104 String type = toWebCoreString(args[0]); 105 double quality; 106 double* qualityPtr = 0; 107 if (args.Length() > 1 && args[1]->IsNumber()) { 108 quality = args[1]->NumberValue(); 109 qualityPtr = &quality; 110 } 111 112 String result = canvas->toDataURL(type, qualityPtr, ec); 113 V8Proxy::setDOMException(ec); 114 return v8StringOrUndefined(result); 115} 116 117} // namespace WebCore 118