1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright (C) 2010,2017 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "DragImage.h"
#include "Element.h"
#include "Image.h"
#include "TextFlags.h"
#include "TextIndicator.h"
#include <cairo.h>
#include <gdk/gdk.h>
#include <wtf/URL.h>
#if USE(SKIA)
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_BEGIN
#include <skia/core/SkBitmap.h>
#include <skia/core/SkCanvas.h>
#include <skia/core/SkImageInfo.h>
WTF_IGNORE_WARNINGS_IN_THIRD_PARTY_CODE_END
#endif
namespace WebCore {
IntSize dragImageSize(DragImageRef image)
{
#if USE(CAIRO)
if (image)
return { cairo_image_surface_get_width(image.get()), cairo_image_surface_get_height(image.get()) };
#elif USE(SKIA)
if (image)
return { image->width(), image->height() };
#endif
return { 0, 0 };
}
void deleteDragImage(DragImageRef)
{
// Since this is a RefPtr, there's nothing additional we need to do to
// delete it. It will be released when it falls out of scope.
}
DragImageRef scaleDragImage(DragImageRef image, FloatSize scale)
{
if (!image)
return nullptr;
IntSize imageSize = dragImageSize(image);
IntSize scaledSize(imageSize);
scaledSize.scale(scale.width(), scale.height());
if (imageSize == scaledSize)
return image;
#if USE(CAIRO)
RefPtr<cairo_surface_t> scaledSurface = adoptRef(cairo_surface_create_similar(image.get(), CAIRO_CONTENT_COLOR_ALPHA, scaledSize.width(), scaledSize.height()));
RefPtr<cairo_t> context = adoptRef(cairo_create(scaledSurface.get()));
cairo_scale(context.get(), scale.width(), scale.height());
cairo_pattern_set_extend(cairo_get_source(context.get()), CAIRO_EXTEND_PAD);
cairo_pattern_set_filter(cairo_get_source(context.get()), CAIRO_FILTER_BEST);
cairo_set_operator(context.get(), CAIRO_OPERATOR_SOURCE);
cairo_set_source_surface(context.get(), image.get(), 0, 0);
cairo_paint(context.get());
return scaledSurface;
#elif USE(SKIA)
auto imageInfo = SkImageInfo::Make(scaledSize.width(), scaledSize.height(), image->imageInfo().colorType(), image->imageInfo().alphaType());
SkBitmap bitmap;
bitmap.allocPixels(imageInfo);
SkPixmap pixmap;
if (!bitmap.peekPixels(&pixmap))
return nullptr;
if (!image->scalePixels(pixmap, SkSamplingOptions(SkCubicResampler::CatmullRom())))
return nullptr;
return SkImages::RasterFromBitmap(bitmap);
#endif
}
DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction)
{
if (!image)
return nullptr;
#if !USE(GTK4)
if (!gdk_screen_is_composited(gdk_screen_get_default()))
return image;
#endif
#if USE(CAIRO)
RefPtr<cairo_t> context = adoptRef(cairo_create(image.get()));
cairo_set_operator(context.get(), CAIRO_OPERATOR_DEST_IN);
cairo_set_source_rgba(context.get(), 0, 0, 0, fraction);
cairo_paint(context.get());
return image;
#elif USE(SKIA)
SkBitmap bitmap;
bitmap.allocPixels(image->imageInfo());
SkPixmap pixmap;
if (!bitmap.peekPixels(&pixmap))
return nullptr;
auto canvas = SkCanvas::MakeRasterDirect(bitmap.info(), pixmap.writable_addr(), bitmap.rowBytes());
SkPaint paint;
paint.setAlphaf(fraction);
canvas->drawImage(image, 0, 0, { }, &paint);
return SkImages::RasterFromBitmap(bitmap);
#endif
}
DragImageRef createDragImageFromImage(Image* image, ImageOrientation, GraphicsClient*, float)
{
return image->currentNativeImage()->platformImage();
}
DragImageRef createDragImageIconForCachedImageFilename(const String&)
{
return nullptr;
}
DragImageRef createDragImageForLink(Element&, URL&, const String&, TextIndicatorData&, float)
{
return nullptr;
}
DragImageRef createDragImageForColor(const Color&, const FloatRect&, float, Path&)
{
return nullptr;
}
}
|
