1 /*
2 * Copyright (C) 2007 Apple 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
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #include "JSHTMLCanvasElement.h"
29
30 #include "CanvasContextAttributes.h"
31 #include "HTMLCanvasElement.h"
32 #include "JSCanvasRenderingContext2D.h"
33 #if ENABLE(WEBGL)
34 #include "JSWebGLRenderingContext.h"
35 #include "WebGLContextAttributes.h"
36 #endif
37 #include <wtf/GetPtr.h>
38
39 using namespace JSC;
40
41 namespace WebCore {
42
getContext(ExecState * exec)43 JSValue JSHTMLCanvasElement::getContext(ExecState* exec)
44 {
45 HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());
46 const UString& contextId = exec->argument(0).toString(exec);
47 RefPtr<CanvasContextAttributes> attrs;
48 #if ENABLE(WEBGL)
49 if (contextId == "experimental-webgl" || contextId == "webkit-3d") {
50 attrs = WebGLContextAttributes::create();
51 WebGLContextAttributes* webGLAttrs = static_cast<WebGLContextAttributes*>(attrs.get());
52 if (exec->argumentCount() > 1 && exec->argument(1).isObject()) {
53 JSObject* jsAttrs = exec->argument(1).getObject();
54 Identifier alpha(exec, "alpha");
55 if (jsAttrs->hasProperty(exec, alpha))
56 webGLAttrs->setAlpha(jsAttrs->get(exec, alpha).toBoolean(exec));
57 Identifier depth(exec, "depth");
58 if (jsAttrs->hasProperty(exec, depth))
59 webGLAttrs->setDepth(jsAttrs->get(exec, depth).toBoolean(exec));
60 Identifier stencil(exec, "stencil");
61 if (jsAttrs->hasProperty(exec, stencil))
62 webGLAttrs->setStencil(jsAttrs->get(exec, stencil).toBoolean(exec));
63 Identifier antialias(exec, "antialias");
64 if (jsAttrs->hasProperty(exec, antialias))
65 webGLAttrs->setAntialias(jsAttrs->get(exec, antialias).toBoolean(exec));
66 Identifier premultipliedAlpha(exec, "premultipliedAlpha");
67 if (jsAttrs->hasProperty(exec, premultipliedAlpha))
68 webGLAttrs->setPremultipliedAlpha(jsAttrs->get(exec, premultipliedAlpha).toBoolean(exec));
69 Identifier preserveDrawingBuffer(exec, "preserveDrawingBuffer");
70 if (jsAttrs->hasProperty(exec, preserveDrawingBuffer))
71 webGLAttrs->setPreserveDrawingBuffer(jsAttrs->get(exec, preserveDrawingBuffer).toBoolean(exec));
72 }
73 }
74 #endif
75 CanvasRenderingContext* context = canvas->getContext(ustringToString(contextId), attrs.get());
76 if (!context)
77 return jsNull();
78 return toJS(exec, globalObject(), WTF::getPtr(context));
79 }
80
toDataURL(ExecState * exec)81 JSValue JSHTMLCanvasElement::toDataURL(ExecState* exec)
82 {
83 const String& type = valueToStringWithUndefinedOrNullCheck(exec, exec->argument(0));
84 HTMLCanvasElement* canvas = static_cast<HTMLCanvasElement*>(impl());
85 ExceptionCode ec = 0;
86
87 JSC::JSValue result;
88 double quality;
89 double* qualityPtr = 0;
90 if (exec->argumentCount() > 1) {
91 JSValue v = exec->argument(1);
92 if (v.isNumber()) {
93 quality = v.toNumber(exec);
94 qualityPtr = &quality;
95 }
96 }
97
98 result = jsString(exec, canvas->toDataURL(type, qualityPtr, ec));
99 setDOMException(exec, ec);
100 return result;
101 }
102
103 } // namespace WebCore
104