1/*
2 * Copyright (c) 2013, 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 "core/page/ImageBitmapFactories.h"
33
34#include "RuntimeEnabledFeatures.h"
35#include "V8ImageBitmap.h"
36#include "bindings/v8/ExceptionState.h"
37#include "core/dom/ExceptionCode.h"
38#include "core/html/HTMLCanvasElement.h"
39#include "core/html/HTMLImageElement.h"
40#include "core/html/HTMLVideoElement.h"
41#include "core/html/ImageData.h"
42#include "core/html/canvas/CanvasRenderingContext2D.h"
43#include "core/page/DOMWindow.h"
44#include "core/page/ImageBitmap.h"
45
46namespace WebCore {
47
48namespace ImageBitmapFactories {
49
50static LayoutSize sizeFor(HTMLImageElement* image)
51{
52    if (ImageResource* cachedImage = image->cachedImage())
53        return cachedImage->imageSizeForRenderer(image->renderer(), 1.0f); // FIXME: Not sure about this.
54    return IntSize();
55}
56
57static IntSize sizeFor(HTMLVideoElement* video)
58{
59    if (MediaPlayer* player = video->player())
60        return player->naturalSize();
61    return IntSize();
62}
63
64static ScriptObject resolveImageBitmap(PassRefPtr<ImageBitmap> imageBitmap)
65{
66    // Promises must be enabled.
67    ASSERT(RuntimeEnabledFeatures::promiseEnabled());
68
69    RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create();
70    resolver->fulfill(imageBitmap);
71    return resolver->promise();
72}
73
74ScriptObject createImageBitmap(EventTarget* eventTarget, HTMLImageElement* image, ExceptionState& es)
75{
76    LayoutSize s = sizeFor(image);
77    return createImageBitmap(eventTarget, image, 0, 0, s.width(), s.height(), es);
78}
79
80ScriptObject createImageBitmap(EventTarget* eventTarget, HTMLImageElement* image, int sx, int sy, int sw, int sh, ExceptionState& es)
81{
82    if (!image) {
83        es.throwTypeError();
84        return ScriptObject();
85    }
86    if (!image->cachedImage()) {
87        es.throwDOMException(InvalidStateError);
88        return ScriptObject();
89    }
90    if (image->cachedImage()->image()->isSVGImage()) {
91        es.throwDOMException(InvalidStateError);
92        return ScriptObject();
93    }
94    if (!sw || !sh) {
95        es.throwDOMException(IndexSizeError);
96        return ScriptObject();
97    }
98    if (!image->cachedImage()->image()->hasSingleSecurityOrigin()) {
99        es.throwDOMException(SecurityError);
100        return ScriptObject();
101    }
102    if (!image->cachedImage()->passesAccessControlCheck(eventTarget->toDOMWindow()->document()->securityOrigin())
103    && eventTarget->toDOMWindow()->document()->securityOrigin()->taintsCanvas(image->src())) {
104        es.throwDOMException(SecurityError);
105        return ScriptObject();
106    }
107    // FIXME: make ImageBitmap creation asynchronous crbug.com/258082
108    return resolveImageBitmap(ImageBitmap::create(image, IntRect(sx, sy, sw, sh)));
109}
110
111ScriptObject createImageBitmap(EventTarget* eventTarget, HTMLVideoElement* video, ExceptionState& es)
112{
113    IntSize s = sizeFor(video);
114    return createImageBitmap(eventTarget, video, 0, 0, s.width(), s.height(), es);
115}
116
117ScriptObject createImageBitmap(EventTarget* eventTarget, HTMLVideoElement* video, int sx, int sy, int sw, int sh, ExceptionState& es)
118{
119    if (!video) {
120        es.throwTypeError();
121        return ScriptObject();
122    }
123    if (!video->player()) {
124        es.throwDOMException(InvalidStateError);
125        return ScriptObject();
126    }
127    if (video->networkState() == HTMLMediaElement::NETWORK_EMPTY) {
128        es.throwDOMException(InvalidStateError);
129        return ScriptObject();
130    }
131    if (video->player()->readyState() <= MediaPlayer::HaveMetadata) {
132        es.throwDOMException(InvalidStateError);
133        return ScriptObject();
134    }
135    if (!sw || !sh) {
136        es.throwDOMException(IndexSizeError);
137        return ScriptObject();
138    }
139    if (!video->hasSingleSecurityOrigin()) {
140        es.throwDOMException(SecurityError);
141        return ScriptObject();
142    }
143    if (!video->player()->didPassCORSAccessCheck() && eventTarget->toDOMWindow()->document()->securityOrigin()->taintsCanvas(video->currentSrc())) {
144        es.throwDOMException(SecurityError);
145        return ScriptObject();
146    }
147    // FIXME: make ImageBitmap creation asynchronous crbug.com/258082
148    return resolveImageBitmap(ImageBitmap::create(video, IntRect(sx, sy, sw, sh)));
149}
150
151ScriptObject createImageBitmap(EventTarget* eventTarget, CanvasRenderingContext2D* context, ExceptionState& es)
152{
153    return createImageBitmap(eventTarget, context->canvas(), es);
154}
155
156ScriptObject createImageBitmap(EventTarget* eventTarget, CanvasRenderingContext2D* context, int sx, int sy, int sw, int sh, ExceptionState& es)
157{
158    return createImageBitmap(eventTarget, context->canvas(), sx, sy, sw, sh, es);
159}
160
161ScriptObject createImageBitmap(EventTarget* eventTarget, HTMLCanvasElement* canvas, ExceptionState& es)
162{
163    return createImageBitmap(eventTarget, canvas, 0, 0, canvas->width(), canvas->height(), es);
164}
165
166ScriptObject createImageBitmap(EventTarget* eventTarget, HTMLCanvasElement* canvas, int sx, int sy, int sw, int sh, ExceptionState& es)
167{
168    if (!canvas) {
169        es.throwTypeError();
170        return ScriptObject();
171    }
172    if (!canvas->originClean()) {
173        es.throwDOMException(InvalidStateError);
174        return ScriptObject();
175    }
176    if (!sw || !sh) {
177        es.throwDOMException(IndexSizeError);
178        return ScriptObject();
179    }
180    // FIXME: make ImageBitmap creation asynchronous crbug.com/258082
181    return resolveImageBitmap(ImageBitmap::create(canvas, IntRect(sx, sy, sw, sh)));
182}
183
184ScriptObject createImageBitmap(EventTarget* eventTarget, ImageData* data, ExceptionState& es)
185{
186    return createImageBitmap(eventTarget, data, 0, 0, data->width(), data->height(), es);
187}
188
189ScriptObject createImageBitmap(EventTarget* eventTarget, ImageData* data, int sx, int sy, int sw, int sh, ExceptionState& es)
190{
191    if (!data) {
192        es.throwTypeError();
193        return ScriptObject();
194    }
195    if (!sw || !sh) {
196        es.throwDOMException(IndexSizeError);
197        return ScriptObject();
198    }
199    // FIXME: make ImageBitmap creation asynchronous crbug.com/258082
200    return resolveImageBitmap(ImageBitmap::create(data, IntRect(sx, sy, sw, sh)));
201}
202
203ScriptObject createImageBitmap(EventTarget* eventTarget, ImageBitmap* bitmap, ExceptionState& es)
204{
205    return createImageBitmap(eventTarget, bitmap, 0, 0, bitmap->width(), bitmap->height(), es);
206}
207
208ScriptObject createImageBitmap(EventTarget* eventTarget, ImageBitmap* bitmap, int sx, int sy, int sw, int sh, ExceptionState& es)
209{
210    if (!bitmap) {
211        es.throwTypeError();
212        return ScriptObject();
213    }
214    if (!sw || !sh) {
215        es.throwDOMException(IndexSizeError);
216        return ScriptObject();
217    }
218    // FIXME: make ImageBitmap creation asynchronous crbug.com/258082
219    return resolveImageBitmap(ImageBitmap::create(bitmap, IntRect(sx, sy, sw, sh)));
220}
221
222} // namespace ImageBitmapFactories
223} // namespace WebCore
224