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1 /*
2  * Copyright (C) 2009 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30 
31 #include "config.h"
32 #include "bindings/core/v8/V8CanvasRenderingContext2D.h"
33 
34 #include "bindings/core/v8/V8Binding.h"
35 #include "bindings/core/v8/V8CanvasGradient.h"
36 #include "bindings/core/v8/V8CanvasPattern.h"
37 #include "bindings/core/v8/V8HTMLCanvasElement.h"
38 #include "bindings/core/v8/V8HTMLImageElement.h"
39 #include "bindings/core/v8/V8HTMLVideoElement.h"
40 #include "bindings/core/v8/V8ImageData.h"
41 #include "core/html/canvas/CanvasGradient.h"
42 #include "core/html/canvas/CanvasPattern.h"
43 #include "core/html/canvas/CanvasRenderingContext2D.h"
44 #include "core/html/canvas/CanvasStyle.h"
45 #include "platform/geometry/FloatRect.h"
46 
47 namespace blink {
48 
toV8Object(CanvasStyle * style,v8::Handle<v8::Object> creationContext,v8::Isolate * isolate)49 static v8::Handle<v8::Value> toV8Object(CanvasStyle* style, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
50 {
51     if (style->canvasGradient())
52         return toV8(style->canvasGradient(), creationContext, isolate);
53 
54     if (style->canvasPattern())
55         return toV8(style->canvasPattern(), creationContext, isolate);
56 
57     return v8String(isolate, style->color());
58 }
59 
toCanvasStyle(v8::Handle<v8::Value> value,v8::Isolate * isolate)60 static PassRefPtrWillBeRawPtr<CanvasStyle> toCanvasStyle(v8::Handle<v8::Value> value, v8::Isolate* isolate)
61 {
62     RefPtrWillBeRawPtr<CanvasStyle> canvasStyle = CanvasStyle::createFromGradient(V8CanvasGradient::toImplWithTypeCheck(isolate, value));
63     if (canvasStyle)
64         return canvasStyle;
65     return CanvasStyle::createFromPattern(V8CanvasPattern::toImplWithTypeCheck(isolate, value));
66 }
67 
strokeStyleAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value> & info)68 void V8CanvasRenderingContext2D::strokeStyleAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
69 {
70     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toImpl(info.Holder());
71     v8SetReturnValue(info, toV8Object(impl->strokeStyle(), info.Holder(), info.GetIsolate()));
72 }
73 
strokeStyleAttributeSetterCustom(v8::Local<v8::Value> value,const v8::PropertyCallbackInfo<void> & info)74 void V8CanvasRenderingContext2D::strokeStyleAttributeSetterCustom(v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<void>& info)
75 {
76     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toImpl(info.Holder());
77     if (RefPtrWillBeRawPtr<CanvasStyle> canvasStyle = toCanvasStyle(value, info.GetIsolate())) {
78         impl->setStrokeStyle(canvasStyle);
79     } else {
80         TOSTRING_VOID(V8StringResource<>, colorString, value);
81         impl->setStrokeColor(colorString);
82     }
83 }
84 
fillStyleAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value> & info)85 void V8CanvasRenderingContext2D::fillStyleAttributeGetterCustom(const v8::PropertyCallbackInfo<v8::Value>& info)
86 {
87     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toImpl(info.Holder());
88     v8SetReturnValue(info, toV8Object(impl->fillStyle(), info.Holder(), info.GetIsolate()));
89 }
90 
fillStyleAttributeSetterCustom(v8::Local<v8::Value> value,const v8::PropertyCallbackInfo<void> & info)91 void V8CanvasRenderingContext2D::fillStyleAttributeSetterCustom(v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<void>& info)
92 {
93     CanvasRenderingContext2D* impl = V8CanvasRenderingContext2D::toImpl(info.Holder());
94     if (RefPtrWillBeRawPtr<CanvasStyle> canvasStyle = toCanvasStyle(value, info.GetIsolate())) {
95         impl->setFillStyle(canvasStyle);
96     } else {
97         TOSTRING_VOID(V8StringResource<>, colorString, value);
98         impl->setFillColor(colorString);
99     }
100 }
101 
102 } // namespace blink
103