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
|
/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationdividemode.c
* Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
* 2012 Ville Sokk <ville.sokk@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl-plugin.h>
#include "libgimpmath/gimpmath.h"
#include "../operations-types.h"
#include "gimpoperationdividelegacy.h"
static gboolean gimp_operation_divide_legacy_process (GeglOperation *op,
void *in,
void *layer,
void *mask,
void *out,
glong samples,
const GeglRectangle *roi,
gint level);
G_DEFINE_TYPE (GimpOperationDivideLegacy, gimp_operation_divide_legacy,
GIMP_TYPE_OPERATION_LAYER_MODE)
static void
gimp_operation_divide_legacy_class_init (GimpOperationDivideLegacyClass *klass)
{
GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
GimpOperationLayerModeClass *layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
gegl_operation_class_set_keys (operation_class,
"name", "gimp:divide-legacy",
"description", "GIMP divide mode operation",
NULL);
layer_mode_class->process = gimp_operation_divide_legacy_process;
}
static void
gimp_operation_divide_legacy_init (GimpOperationDivideLegacy *self)
{
}
static gboolean
gimp_operation_divide_legacy_process (GeglOperation *op,
void *in_p,
void *layer_p,
void *mask_p,
void *out_p,
glong samples,
const GeglRectangle *roi,
gint level)
{
GimpOperationLayerMode *layer_mode = (gpointer) op;
gfloat *in = in_p;
gfloat *out = out_p;
gfloat *layer = layer_p;
gfloat *mask = mask_p;
gfloat opacity = layer_mode->opacity;
while (samples--)
{
gfloat comp_alpha, new_alpha;
comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
if (mask)
comp_alpha *= *mask;
new_alpha = in[ALPHA] + (1.0f - in[ALPHA]) * comp_alpha;
if (comp_alpha && new_alpha)
{
gint b;
gfloat ratio = comp_alpha / new_alpha;
for (b = RED; b < ALPHA; b++)
{
gfloat comp = in[b] / layer[b];
comp = SAFE_CLAMP (comp, 0.0f, 1.0f);
out[b] = comp * ratio + in[b] * (1.0f - ratio);
}
}
else
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = in[b];
}
}
out[ALPHA] = in[ALPHA];
in += 4;
layer += 4;
out += 4;
if (mask)
mask++;
}
return TRUE;
}
|
