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app: added gegl version of lighten only blending mode

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This commit is contained in:
Ville Sokk
2012-04-17 23:00:28 +03:00
committed by Michael Natterer
parent 6d1776d354
commit e4d97f9a95
2 changed files with 25 additions and 7 deletions
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3
app/gegl/gimp-gegl-nodes.c
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@ -257,7 +257,6 @@ gimp_gegl_node_set_layer_mode (GeglNode *node,
case GIMP_ADDITION_MODE:
case GIMP_SUBTRACT_MODE:
case GIMP_DARKEN_ONLY_MODE:
case GIMP_LIGHTEN_ONLY_MODE:
case GIMP_HUE_MODE:
case GIMP_SATURATION_MODE:
case GIMP_COLOR_MODE:
@ -296,7 +295,7 @@ gimp_gegl_node_set_layer_mode (GeglNode *node,
case GIMP_ADDITION_MODE: operation = "gimp:addition-mode"; break;
case GIMP_SUBTRACT_MODE: operation = "gimp:subtract-mode"; break;
case GIMP_DARKEN_ONLY_MODE: operation = "gimp:darken-mode"; break;
case GIMP_LIGHTEN_ONLY_MODE: operation = "gimp:lighten-mode"; break;
case GIMP_LIGHTEN_ONLY_MODE: operation = "gimp:lighten-only-mode"; break;
case GIMP_HUE_MODE: operation = "gimp:hue-mode"; break;
case GIMP_SATURATION_MODE: operation = "gimp:saturation-mode"; break;
case GIMP_COLOR_MODE: operation = "gimp:color-mode"; break;

29
app/gegl/gimpoperationlightenonlymode.c
View File

@ -3,6 +3,7 @@
*
* gimpoperationlightenonlymode.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
@ -40,6 +41,14 @@ static gboolean gimp_operation_lighten_only_mode_process (GeglOperation *o
G_DEFINE_TYPE (GimpOperationLightenOnlyMode, gimp_operation_lighten_only_mode,
GIMP_TYPE_OPERATION_POINT_LAYER_MODE)
static void prepare (GeglOperation *operation)
{
const Babl *format = babl_format ("R'G'B'A float");
gegl_operation_set_format (operation, "input", format);
gegl_operation_set_format (operation, "aux", format);
gegl_operation_set_format (operation, "output", format);
}
static void
gimp_operation_lighten_only_mode_class_init (GimpOperationLightenOnlyModeClass *klass)
@ -55,7 +64,8 @@ gimp_operation_lighten_only_mode_class_init (GimpOperationLightenOnlyModeClass *
"description", "GIMP lighten only mode operation",
NULL);
point_class->process = gimp_operation_lighten_only_mode_process;
point_class->process = gimp_operation_lighten_only_mode_process;
operation_class->prepare = prepare;
}
static void
@ -69,7 +79,7 @@ gimp_operation_lighten_only_mode_process (GeglOperation *operation,
void *aux_buf,
void *out_buf,
glong samples,
const GeglRectangle *roi,
const GeglRectangle *result,
gint level)
{
gfloat *in = in_buf;
@ -78,11 +88,20 @@ gimp_operation_lighten_only_mode_process (GeglOperation *operation,
while (samples--)
{
out[RED] = in[RED];
out[GREEN] = in[GREEN];
out[BLUE] = in[BLUE];
gint b;
gfloat comp_alpha = MIN (in[ALPHA] * layer[ALPHA], layer[ALPHA] * in[ALPHA]);
gfloat new_alpha = in[ALPHA] + (1 - in[ALPHA]) * comp_alpha;
gfloat ratio = comp_alpha / new_alpha;
out[ALPHA] = in[ALPHA];
for (b = RED; b < ALPHA; b++)
{
gfloat comp = MAX (layer[b], in[b]);
out[b] = comp * ratio + in[b] * (1 - ratio);
}
in += 4;
layer += 4;
out += 4;