1 /*
2 * Copyright (c) 2008, 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 "DragImage.h"
33
34 #include "Image.h"
35 #include "NativeImageSkia.h"
36 #include "NotImplemented.h"
37 #include "RefPtr.h"
38 #include "SkBitmap.h"
39
40 #include "skia/ext/image_operations.h"
41
42 namespace WebCore {
43
dragImageSize(DragImageRef image)44 IntSize dragImageSize(DragImageRef image)
45 {
46 if (!image)
47 return IntSize();
48
49 return IntSize(image->width(), image->height());
50 }
51
deleteDragImage(DragImageRef image)52 void deleteDragImage(DragImageRef image)
53 {
54 delete image;
55 }
56
scaleDragImage(DragImageRef image,FloatSize scale)57 DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)
58 {
59 if (!image)
60 return 0;
61
62 int imageWidth = scale.width() * image->width();
63 int imageHeight = scale.height() * image->height();
64 DragImageRef scaledImage = new SkBitmap(
65 skia::ImageOperations::Resize(*image, skia::ImageOperations::RESIZE_LANCZOS3,
66 imageWidth, imageHeight));
67 delete image;
68 return scaledImage;
69 }
70
dissolveDragImageToFraction(DragImageRef image,float fraction)71 DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction)
72 {
73 if (!image)
74 return 0;
75
76 image->setIsOpaque(false);
77 image->lockPixels();
78
79 for (int row = 0; row < image->height(); ++row) {
80 for (int column = 0; column < image->width(); ++column) {
81 uint32_t* pixel = image->getAddr32(column, row);
82 *pixel = SkPreMultiplyARGB(SkColorGetA(*pixel) * fraction,
83 SkColorGetR(*pixel),
84 SkColorGetG(*pixel),
85 SkColorGetB(*pixel));
86 }
87 }
88
89 image->unlockPixels();
90
91 return image;
92 }
93
createDragImageFromImage(Image * image)94 DragImageRef createDragImageFromImage(Image* image)
95 {
96 if (!image)
97 return 0;
98
99 NativeImageSkia* bitmap = image->nativeImageForCurrentFrame();
100 if (!bitmap)
101 return 0;
102
103 SkBitmap* dragImage = new SkBitmap();
104 bitmap->copyTo(dragImage, SkBitmap::kARGB_8888_Config);
105 return dragImage;
106 }
107
createDragImageIconForCachedImage(CachedImage *)108 DragImageRef createDragImageIconForCachedImage(CachedImage*)
109 {
110 notImplemented();
111 return 0;
112 }
113
114 } // namespace WebCore
115