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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpoperationreplace.c
* Copyright (C) 2008 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 <string.h>
#include <gegl-plugin.h>
#include "../operations-types.h"
#include "gimp-layer-modes.h"
#include "gimpoperationreplace.h"
static GeglRectangle gimp_operation_replace_get_bounding_box (GeglOperation *op);
static gboolean gimp_operation_replace_parent_process (GeglOperation *op,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level);
static gboolean gimp_operation_replace_process (GeglOperation *op,
void *in,
void *layer,
void *mask,
void *out,
glong samples,
const GeglRectangle *roi,
gint level);
static GimpLayerCompositeRegion gimp_operation_replace_get_affected_region (GimpOperationLayerMode *layer_mode);
G_DEFINE_TYPE (GimpOperationReplace, gimp_operation_replace,
GIMP_TYPE_OPERATION_LAYER_MODE)
#define parent_class gimp_operation_replace_parent_class
static void
gimp_operation_replace_class_init (GimpOperationReplaceClass *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:replace",
"description", "GIMP replace mode operation",
NULL);
operation_class->get_bounding_box = gimp_operation_replace_get_bounding_box;
layer_mode_class->parent_process = gimp_operation_replace_parent_process;
layer_mode_class->process = gimp_operation_replace_process;
layer_mode_class->get_affected_region = gimp_operation_replace_get_affected_region;
}
static void
gimp_operation_replace_init (GimpOperationReplace *self)
{
}
static GeglRectangle
gimp_operation_replace_get_bounding_box (GeglOperation *op)
{
GimpOperationLayerMode *self = (gpointer) op;
GeglRectangle *in_rect;
GeglRectangle *aux_rect;
GeglRectangle *aux2_rect;
GeglRectangle src_rect = {};
GeglRectangle dst_rect = {};
GeglRectangle result;
GimpLayerCompositeRegion included_region;
in_rect = gegl_operation_source_get_bounding_box (op, "input");
aux_rect = gegl_operation_source_get_bounding_box (op, "aux");
aux2_rect = gegl_operation_source_get_bounding_box (op, "aux2");
if (in_rect)
dst_rect = *in_rect;
if (aux_rect)
{
src_rect = *aux_rect;
if (aux2_rect)
gegl_rectangle_intersect (&src_rect, &src_rect, aux2_rect);
}
if (self->is_last_node)
{
included_region = GIMP_LAYER_COMPOSITE_REGION_SOURCE;
}
else
{
included_region = gimp_layer_mode_get_included_region (self->layer_mode,
self->composite_mode);
}
if (self->prop_opacity == 0.0)
included_region &= ~GIMP_LAYER_COMPOSITE_REGION_SOURCE;
else if (self->prop_opacity == 1.0 && ! aux2_rect)
included_region &= ~GIMP_LAYER_COMPOSITE_REGION_DESTINATION;
gegl_rectangle_intersect (&result, &src_rect, &dst_rect);
if (included_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE)
gegl_rectangle_bounding_box (&result, &result, &src_rect);
if (included_region & GIMP_LAYER_COMPOSITE_REGION_DESTINATION)
gegl_rectangle_bounding_box (&result, &result, &dst_rect);
return result;
}
static gboolean
gimp_operation_replace_parent_process (GeglOperation *op,
GeglOperationContext *context,
const gchar *output_prop,
const GeglRectangle *result,
gint level)
{
GimpOperationLayerMode *layer_mode = (gpointer) op;
GimpLayerCompositeRegion included_region;
included_region = gimp_layer_mode_get_included_region
(layer_mode->layer_mode, layer_mode->composite_mode);
/* if the layer's opacity is 100%, it has no mask, and its composite mode
* contains "aux" (the latter should always be the case in practice,
* currently,) we can just pass "aux" directly as output.
*/
if (layer_mode->opacity == 1.0 &&
! gegl_operation_context_get_object (context, "aux2") &&
(included_region & GIMP_LAYER_COMPOSITE_REGION_SOURCE))
{
GObject *aux;
aux = gegl_operation_context_get_object (context, "aux");
gegl_operation_context_set_object (context, "output", aux);
return TRUE;
}
/* the opposite case, where the opacity is 0%, is handled by
* GimpOperationLayerMode.
*/
else if (layer_mode->opacity == 0.0)
{
}
/* if both buffers are included in the result, and if both of them have the
* same content -- i.e., if they share the same storage, same alignment, and
* same abyss (or if the abyss is irrelevant) -- we can just pass either of
* them directly as output.
*/
else if (included_region == GIMP_LAYER_COMPOSITE_REGION_UNION)
{
GObject *input;
GObject *aux;
input = gegl_operation_context_get_object (context, "input");
aux = gegl_operation_context_get_object (context, "aux");
if (input && aux &&
gegl_buffer_share_storage (GEGL_BUFFER (input), GEGL_BUFFER (aux)))
{
gint input_shift_x;
gint input_shift_y;
gint aux_shift_x;
gint aux_shift_y;
g_object_get (input,
"shift-x", &input_shift_x,
"shift-y", &input_shift_y,
NULL);
g_object_get (aux,
"shift-x", &aux_shift_x,
"shift-y", &aux_shift_y,
NULL);
if (input_shift_x == aux_shift_x && input_shift_y == aux_shift_y)
{
const GeglRectangle *input_abyss;
const GeglRectangle *aux_abyss;
input_abyss = gegl_buffer_get_abyss (GEGL_BUFFER (input));
aux_abyss = gegl_buffer_get_abyss (GEGL_BUFFER (aux));
if (gegl_rectangle_equal (input_abyss, aux_abyss) ||
(gegl_rectangle_contains (input_abyss, result) &&
gegl_rectangle_contains (aux_abyss, result)))
{
gegl_operation_context_set_object (context, "output", input);
return TRUE;
}
}
}
}
return GIMP_OPERATION_LAYER_MODE_CLASS (parent_class)->parent_process (
op, context, output_prop, result, level);
}
static gboolean
gimp_operation_replace_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 opacity_value = opacity;
gfloat new_alpha;
gfloat ratio;
gint b;
if (has_mask)
opacity_value *= *mask;
new_alpha = (layer[ALPHA] - in[ALPHA]) * opacity_value + in[ALPHA];
ratio = opacity_value;
if (new_alpha)
ratio *= layer[ALPHA] / new_alpha;
for (b = RED; b < ALPHA; b++)
out[b] = (layer[b] - in[b]) * ratio + in[b];
out[ALPHA] = new_alpha;
in += 4;
layer += 4;
out += 4;
if (has_mask)
mask++;
}
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_BACKDROP:
while (samples--)
{
gfloat opacity_value = opacity;
gfloat new_alpha;
gint b;
if (has_mask)
opacity_value *= *mask;
new_alpha = in[ALPHA] * (1.0f - opacity_value);
for (b = RED; b < ALPHA; b++)
out[b] = in[b];
out[ALPHA] = new_alpha;
in += 4;
out += 4;
if (has_mask)
mask++;
}
break;
case GIMP_LAYER_COMPOSITE_CLIP_TO_LAYER:
while (samples--)
{
gfloat opacity_value = opacity;
gfloat new_alpha;
gint b;
if (has_mask)
opacity_value *= *mask;
new_alpha = layer[ALPHA] * opacity_value;
for (b = RED; b < ALPHA; b++)
out[b] = layer[b];
out[ALPHA] = new_alpha;
in += 4;
layer += 4;
out += 4;
if (has_mask)
mask++;
}
break;
case GIMP_LAYER_COMPOSITE_INTERSECTION:
memset (out, 0, 4 * samples * sizeof (gfloat));
break;
}
return TRUE;
}
static GimpLayerCompositeRegion
gimp_operation_replace_get_affected_region (GimpOperationLayerMode *layer_mode)
{
GimpLayerCompositeRegion affected_region = GIMP_LAYER_COMPOSITE_REGION_INTERSECTION;
if (layer_mode->prop_opacity != 0.0)
affected_region |= GIMP_LAYER_COMPOSITE_REGION_DESTINATION;
/* if opacity != 1.0, or we have a mask, then we also affect SOURCE, but this
* is considered the case anyway, so no need for special handling.
*/
return affected_region;
}
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