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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationnormalmode.c
* Copyright (C) 2012 Michael Natterer <mitch@gimp.org>
*
* 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 <gio/gio.h>
#include <gegl-plugin.h>
#include "libgimpbase/gimpbase.h"
#include "../operations-types.h"
#include "gimpoperationnormal.h"
G_DEFINE_TYPE (GimpOperationNormal, gimp_operation_normal,
GIMP_TYPE_OPERATION_LAYER_MODE)
static const gchar* reference_xml = "<?xml version='1.0' encoding='UTF-8'?>"
"<gegl>"
"<node operation='gimp:normal'>"
" <node operation='gegl:load'>"
" <params>"
" <param name='path'>blending-test-B.png</param>"
" </params>"
" </node>"
"</node>"
"<node operation='gegl:load'>"
" <params>"
" <param name='path'>blending-test-A.png</param>"
" </params>"
"</node>"
"</gegl>";
static void
gimp_operation_normal_class_init (GimpOperationNormalClass *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:normal",
"description", "GIMP normal mode operation",
"reference-image", "normal-mode.png",
"reference-composition", reference_xml,
NULL);
layer_mode_class->process = gimp_operation_normal_process;
#if COMPILE_SSE2_INTRINISICS
if (gimp_cpu_accel_get_support() & GIMP_CPU_ACCEL_X86_SSE2)
layer_mode_class->process = gimp_operation_normal_process_sse2;
#endif /* COMPILE_SSE2_INTRINISICS */
#if COMPILE_SSE4_1_INTRINISICS
if (gimp_cpu_accel_get_support() & GIMP_CPU_ACCEL_X86_SSE4_1)
layer_mode_class->process = gimp_operation_normal_process_sse4;
#endif /* COMPILE_SSE4_1_INTRINISICS */
}
static void
gimp_operation_normal_init (GimpOperationNormal *self)
{
}
gboolean
gimp_operation_normal_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;
const gboolean has_mask = mask != NULL;
switch (layer_mode->composite_mode)
{
case GIMP_LAYER_COMPOSITE_UNION:
case GIMP_LAYER_COMPOSITE_AUTO:
while (samples--)
{
gfloat layer_alpha;
layer_alpha = layer[ALPHA] * opacity;
if (has_mask)
layer_alpha *= *mask;
out[ALPHA] = layer_alpha + in[ALPHA] - layer_alpha * in[ALPHA];
if (out[ALPHA])
{
gfloat layer_weight = layer_alpha / out[ALPHA];
gfloat in_weight = 1.0f - layer_weight;
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = layer[b] * layer_weight + in[b] * in_weight;
}
}
else
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = in[b];
}
}
in += 4;
layer += 4;
out += 4;
if (has_mask)
mask++;
}
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP:
while (samples--)
{
gfloat layer_alpha;
layer_alpha = layer[ALPHA] * opacity;
if (has_mask)
layer_alpha *= *mask;
out[ALPHA] = in[ALPHA];
if (out[ALPHA])
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = in[b] + (layer[b] - in[b]) * layer_alpha;
}
}
else
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = in[b];
}
}
in += 4;
layer += 4;
out += 4;
if (has_mask)
mask++;
}
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER:
while (samples--)
{
gfloat layer_alpha;
layer_alpha = layer[ALPHA] * opacity;
if (has_mask)
layer_alpha *= *mask;
out[ALPHA] = layer_alpha;
if (out[ALPHA])
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = layer[b];
}
}
else
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = in[b];
}
}
in += 4;
layer += 4;
out += 4;
if (has_mask)
mask++;
}
break;
case GIMP_LAYER_COMPOSITE_INTERSECTION:
while (samples--)
{
gfloat layer_alpha;
layer_alpha = layer[ALPHA] * opacity;
if (has_mask)
layer_alpha *= *mask;
out[ALPHA] = in[ALPHA] * layer_alpha;
if (out[ALPHA])
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = layer[b];
}
}
else
{
gint b;
for (b = RED; b < ALPHA; b++)
{
out[b] = in[b];
}
}
in += 4;
layer += 4;
out += 4;
if (has_mask)
mask++;
}
break;
}
return TRUE;
}
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