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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
// SPDX-License-Identifier: GPL-2.0-or-later
/** \file
* SVGPreview: Preview cache
*/
/*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Bryce Harrington <brycehar@bryceharrington.org>
* bulia byak <buliabyak@users.sf.net>
*
* Copyright (C) 2001-2005 authors
* Copyright (C) 2001 Ximian, Inc.
* Copyright (C) 2004 John Cliff
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*
*/
#include <gtk/gtk.h>
#include <2geom/transforms.h>
#include "selection.h"
#include "inkscape.h"
#include "display/cairo-utils.h"
#include "display/drawing-context.h"
#include "display/drawing-item.h"
#include "display/drawing.h"
#include "ui/cache/svg_preview_cache.h"
cairo_surface_t* render_surface(Inkscape::Drawing &drawing, double scale_factor, Geom::Rect const &dbox,
Geom::IntPoint pixsize, double device_scale, const guint32* checkerboard_color, bool no_clip)
{
scale_factor *= device_scale;
pixsize.x() *= device_scale;
pixsize.y() *= device_scale;
Geom::IntRect ibox = (dbox * Geom::Scale(scale_factor)).roundOutwards();
if (no_clip) {
// check if object fits in the surface
if (ibox.width() > pixsize.x() || ibox.height() > pixsize.y()) {
auto sx = static_cast<double>(ibox.width()) / pixsize.x();
auto sy = static_cast<double>(ibox.height()) / pixsize.y();
// reduce scale
scale_factor /= std::max(sx, sy);
ibox = (dbox * Geom::Scale(scale_factor)).roundOutwards();
}
}
drawing.root()->setTransform(Geom::Scale(scale_factor));
drawing.update(ibox);
/* Find visible area */
int width = ibox.width();
int height = ibox.height();
int dx = pixsize.x();
int dy = pixsize.y();
dx = (dx - width)/2; // watch out for size, since 'unsigned'-'signed' can cause problems if the result is negative
dy = (dy - height)/2;
Geom::IntRect area = Geom::IntRect::from_xywh(ibox.min() - Geom::IntPoint(dx, dy), pixsize);
/* Render */
cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, pixsize.x(), pixsize.y());
Inkscape::DrawingContext dc(s, area.min());
if (checkerboard_color) {
guint rgba = *checkerboard_color;
auto pattern = ink_cairo_pattern_create_checkerboard(rgba);
dc.save();
dc.transform(Geom::Scale(device_scale));
dc.setOperator(CAIRO_OPERATOR_SOURCE);
dc.setSource(pattern);
dc.paint();
dc.restore();
cairo_pattern_destroy(pattern);
}
drawing.render(dc, area, Inkscape::DrawingItem::RENDER_BYPASS_CACHE);
cairo_surface_flush(s);
return s;
}
GdkPixbuf* render_pixbuf(Inkscape::Drawing &drawing, double scale_factor, Geom::Rect const &dbox, unsigned psize) {
auto s = render_surface(drawing, scale_factor, dbox, Geom::IntPoint(psize, psize), 1, nullptr, true);
GdkPixbuf* pixbuf = ink_pixbuf_create_from_cairo_surface(s);
return pixbuf;
}
namespace Inkscape {
namespace UI {
namespace Cache {
SvgPreview::SvgPreview()
= default;
SvgPreview::~SvgPreview()
{
for (auto & i : _pixmap_cache)
{
g_object_unref(i.second);
i.second = NULL;
}
}
Glib::ustring SvgPreview::cache_key(gchar const *uri, gchar const *name, unsigned psize) const {
Glib::ustring key;
key += (uri!=nullptr) ? uri : "";
key += ":";
key += (name!=nullptr) ? name : "unknown";
key += ":";
key += psize;
return key;
}
GdkPixbuf* SvgPreview::get_preview_from_cache(const Glib::ustring& key) {
std::map<Glib::ustring, GdkPixbuf *>::iterator found = _pixmap_cache.find(key);
if ( found != _pixmap_cache.end() ) {
return found->second;
}
return nullptr;
}
void SvgPreview::set_preview_in_cache(const Glib::ustring& key, GdkPixbuf* px) {
g_object_ref(px);
_pixmap_cache[key] = px;
}
GdkPixbuf* SvgPreview::get_preview(const gchar* uri, const gchar* id, Inkscape::DrawingItem */*root*/,
double /*scale_factor*/, unsigned int psize) {
// First try looking up the cached preview in the cache map
Glib::ustring key = cache_key(uri, id, psize);
GdkPixbuf* px = get_preview_from_cache(key);
if (px == nullptr) {
/*
px = render_pixbuf(root, scale_factor, dbox, psize);
set_preview_in_cache(key, px);
*/
}
return px;
}
void SvgPreview::remove_preview_from_cache(const Glib::ustring& key) {
std::map<Glib::ustring, GdkPixbuf *>::iterator found = _pixmap_cache.find(key);
if ( found != _pixmap_cache.end() ) {
g_object_unref(found->second);
found->second = NULL;
_pixmap_cache.erase(key);
}
}
}
}
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
|
