1 /*
2 * 2010 Igalia S.L
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "config.h"
20 #include "DragImage.h"
21
22 #include "CachedImage.h"
23 #include "Image.h"
24 #include "RefPtrCairo.h"
25 #include <cairo.h>
26
27 namespace WebCore {
28
dragImageSize(DragImageRef image)29 IntSize dragImageSize(DragImageRef image)
30 {
31 if (image)
32 return IntSize(cairo_image_surface_get_width(image), cairo_image_surface_get_height(image));
33
34 return IntSize(0, 0);
35 }
36
deleteDragImage(DragImageRef image)37 void deleteDragImage(DragImageRef image)
38 {
39 if (image)
40 cairo_surface_destroy(image);
41 }
42
scaleDragImage(DragImageRef image,FloatSize scale)43 DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)
44 {
45 if (!image)
46 return 0;
47
48 int newWidth = scale.width() * cairo_image_surface_get_width(image);
49 int newHeight = scale.height() * cairo_image_surface_get_height(image);
50 cairo_surface_t* scaledSurface = cairo_surface_create_similar(image, CAIRO_CONTENT_COLOR_ALPHA, newWidth, newHeight);
51
52 RefPtr<cairo_t> context = adoptRef(cairo_create(scaledSurface));
53 cairo_scale(context.get(), scale.width(), scale.height());
54 cairo_pattern_set_extend(cairo_get_source(context.get()), CAIRO_EXTEND_PAD);
55 cairo_pattern_set_filter(cairo_get_source(context.get()), CAIRO_FILTER_BEST);
56 cairo_set_operator(context.get(), CAIRO_OPERATOR_SOURCE);
57 cairo_set_source_surface(context.get(), image, 0, 0);
58 cairo_paint(context.get());
59
60 deleteDragImage(image);
61 return scaledSurface;
62 }
63
dissolveDragImageToFraction(DragImageRef image,float fraction)64 DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction)
65 {
66 if (!image)
67 return 0;
68
69 RefPtr<cairo_t> context = adoptRef(cairo_create(image));
70 cairo_set_operator(context.get(), CAIRO_OPERATOR_DEST_IN);
71 cairo_set_source_rgba(context.get(), 0, 0, 0, fraction);
72 cairo_paint(context.get());
73 return image;
74 }
75
createDragImageFromImage(Image * image)76 DragImageRef createDragImageFromImage(Image* image)
77 {
78 return cairo_surface_reference(image->nativeImageForCurrentFrame());
79 }
80
createDragImageIconForCachedImage(CachedImage *)81 DragImageRef createDragImageIconForCachedImage(CachedImage*)
82 {
83 return 0;
84 }
85
86 }
87