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
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* feFlood filter primitive renderer
*
* Authors:
* Felipe Corrêa da Silva Sanches <juca@members.fsf.org>
* Tavmjong Bah <tavmjong@free.fr> (use primitive filter region)
*
* Copyright (C) 2007, 2011 authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#ifdef HAVE_CONFIG_H
#include "config.h" // only include where actually required!
#endif
#include "display/cairo-utils.h"
#include "display/nr-filter-flood.h"
#include "display/nr-filter-slot.h"
#include "svg/svg-icc-color.h"
#include "svg/svg-color.h"
#include "color.h"
namespace Inkscape {
namespace Filters {
FilterFlood::FilterFlood() = default;
FilterFlood::~FilterFlood() = default;
void FilterFlood::render_cairo(FilterSlot &slot) const
{
cairo_surface_t *input = slot.getcairo(_input);
double r = SP_RGBA32_R_F(color);
double g = SP_RGBA32_G_F(color);
double b = SP_RGBA32_B_F(color);
double a = opacity;
if (icc) {
unsigned char ru, gu, bu;
icc_color_to_sRGB(&*icc, &ru, &gu, &bu);
r = SP_COLOR_U_TO_F(ru);
g = SP_COLOR_U_TO_F(gu);
b = SP_COLOR_U_TO_F(bu);
}
cairo_surface_t *out = ink_cairo_surface_create_same_size(input, CAIRO_CONTENT_COLOR_ALPHA);
// Flood color is always defined in terms of sRGB, preconvert to linearRGB
// if color_interpolation_filters set to linearRGB (for efficiency assuming
// next filter primitive has same value of cif).
if (color_interpolation == SP_CSS_COLOR_INTERPOLATION_LINEARRGB) {
r = srgb_to_linear(r);
g = srgb_to_linear(g);
b = srgb_to_linear(b);
}
set_cairo_surface_ci(out, color_interpolation);
// Get filter primitive area in user units
Geom::Rect fp = filter_primitive_area(slot.get_units());
// Convert to Cairo units
Geom::Rect fp_cairo = fp * slot.get_units().get_matrix_user2pb();
// Get area in slot (tile to fill)
Geom::Rect sa = slot.get_slot_area();
// Get overlap
Geom::OptRect optoverlap = intersect(fp_cairo, sa);
if (optoverlap) {
Geom::Rect overlap = *optoverlap;
auto d = fp_cairo.min() - sa.min();
if (d.x() < 0.0) d.x() = 0.0;
if (d.y() < 0.0) d.y() = 0.0;
cairo_t *ct = cairo_create(out);
cairo_set_source_rgba(ct, r, g, b, a);
cairo_set_operator(ct, CAIRO_OPERATOR_SOURCE);
cairo_rectangle(ct, d.x(), d.y(), overlap.width(), overlap.height());
cairo_fill(ct);
cairo_destroy(ct);
}
slot.set(_output, out);
cairo_surface_destroy(out);
}
bool FilterFlood::can_handle_affine(Geom::Affine const &) const
{
// flood is a per-pixel primitive and is immutable under transformations
return true;
}
void FilterFlood::set_color(guint32 c)
{
color = c;
}
void FilterFlood::set_opacity(double o)
{
opacity = o;
}
double FilterFlood::complexity(Geom::Affine const &) const
{
// flood is actually less expensive than normal rendering,
// but when flood is processed, the object has already been rendered
return 1.0;
}
} // namespace Filters
} // namespace Inkscape
/*
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 :
|
