blob: 9ebfe40756b2c9eb57971e7df1a7ecb5a4882b13 (
plain)
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
/*
* feMerge filter effect renderer
*
* Authors:
* Niko Kiirala <niko@kiirala.com>
*
* Copyright (C) 2007 authors
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <vector>
#include "display/cairo-utils.h"
#include "display/nr-filter-merge.h"
#include "display/nr-filter-slot.h"
#include "display/nr-filter-utils.h"
namespace Inkscape {
namespace Filters {
FilterMerge::FilterMerge() :
_input_image(1, NR_FILTER_SLOT_NOT_SET)
{}
FilterPrimitive * FilterMerge::create() {
return new FilterMerge();
}
FilterMerge::~FilterMerge()
= default;
void FilterMerge::render_cairo(FilterSlot &slot)
{
if (_input_image.empty()) return;
SPColorInterpolation ci_fp = SP_CSS_COLOR_INTERPOLATION_AUTO;
if( _style ) {
ci_fp = (SPColorInterpolation)_style->color_interpolation_filters.computed;
}
Geom::Rect vp = filter_primitive_area( slot.get_units() );
slot.set_primitive_area(_output, vp); // Needed for tiling
// output is RGBA if at least one input is RGBA
bool rgba32 = false;
cairo_surface_t *out = nullptr;
for (int & i : _input_image) {
cairo_surface_t *in = slot.getcairo(i);
if (cairo_surface_get_content(in) == CAIRO_CONTENT_COLOR_ALPHA) {
out = ink_cairo_surface_create_identical(in);
set_cairo_surface_ci( out, ci_fp );
rgba32 = true;
break;
}
}
if (!rgba32) {
out = ink_cairo_surface_create_identical(slot.getcairo(_input_image[0]));
}
cairo_t *out_ct = cairo_create(out);
for (int & i : _input_image) {
cairo_surface_t *in = slot.getcairo(i);
set_cairo_surface_ci( in, ci_fp );
cairo_set_source_surface(out_ct, in, 0, 0);
cairo_paint(out_ct);
}
cairo_destroy(out_ct);
slot.set(_output, out);
cairo_surface_destroy(out);
}
bool FilterMerge::can_handle_affine(Geom::Affine const &)
{
// Merge is a per-pixel primitive and is immutable under transformations
return true;
}
double FilterMerge::complexity(Geom::Affine const &)
{
return 1.02;
}
bool FilterMerge::uses_background()
{
for (int input : _input_image) {
if (input == NR_FILTER_BACKGROUNDIMAGE || input == NR_FILTER_BACKGROUNDALPHA) {
return true;
}
}
return false;
}
void FilterMerge::set_input(int slot) {
_input_image[0] = slot;
}
void FilterMerge::set_input(int input, int slot) {
if (input < 0) return;
if (static_cast<int>(_input_image.size()) > input) {
_input_image[input] = slot;
} else {
for (int i = static_cast<int>(_input_image.size()) ; i < input ; i++) {
_input_image.push_back(NR_FILTER_SLOT_NOT_SET);
}
_input_image.push_back(slot);
}
}
} /* 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 :
|
