1214d4acf1
Stuff like passing "input" directly if "aux"'s opacity is 0, etc. Used to be partly handled by normal mode, even though it applies to other modes too. Adjust the logic for the new compositing modes. Add a GimpLayerModeAffectMask enum, and a corresponding get_affect_mask() function to GimpOperationLayerMode, which specifies which of the op's inputs, if any, are affected by the mode, apart from the overlapping regions. Most modes affect only the overlapping regions, but dissolve and replace also affect the rest of the input. This information is used for determining if the optimizations are applicable.
132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpoperationreplace.c
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* Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl-plugin.h>
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#include "../operations-types.h"
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#include "gimpoperationreplace.h"
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static GimpLayerModeAffectMask gimp_operation_replace_get_affect_mask (GimpOperationLayerMode *layer_mode);
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G_DEFINE_TYPE (GimpOperationReplace, gimp_operation_replace,
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GIMP_TYPE_OPERATION_LAYER_MODE)
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static void
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gimp_operation_replace_class_init (GimpOperationReplaceClass *klass)
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{
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GeglOperationClass *operation_class;
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GeglOperationPointComposer3Class *point_class;
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GimpOperationLayerModeClass *layer_mode_class;
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operation_class = GEGL_OPERATION_CLASS (klass);
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point_class = GEGL_OPERATION_POINT_COMPOSER3_CLASS (klass);
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layer_mode_class = GIMP_OPERATION_LAYER_MODE_CLASS (klass);
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gegl_operation_class_set_keys (operation_class,
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"name", "gimp:replace",
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"description", "GIMP replace mode operation",
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NULL);
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point_class->process = gimp_operation_replace_process;
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layer_mode_class->get_affect_mask = gimp_operation_replace_get_affect_mask;
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}
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static void
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gimp_operation_replace_init (GimpOperationReplace *self)
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{
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}
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gboolean
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gimp_operation_replace_process (GeglOperation *op,
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void *in_p,
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void *layer_p,
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void *mask_p,
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void *out_p,
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glong samples,
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const GeglRectangle *roi,
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gint level)
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{
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GimpOperationLayerMode *layer_mode = (gpointer) op;
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gfloat *in = in_p;
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gfloat *out = out_p;
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gfloat *layer = layer_p;
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gfloat *mask = mask_p;
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gfloat opacity = layer_mode->opacity;
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const gboolean has_mask = mask != NULL;
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while (samples--)
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{
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gfloat opacity_value = opacity;
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gfloat new_alpha;
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gint b;
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if (has_mask)
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opacity_value *= *mask;
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new_alpha = (layer[ALPHA] - in[ALPHA]) * opacity_value + in[ALPHA];
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if (new_alpha)
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{
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gfloat ratio = opacity_value * layer[ALPHA] / new_alpha;
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for (b = RED; b < ALPHA; b++)
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out[b] = (layer[b] - in[b]) * ratio + in[b];
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}
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else
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{
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for (b = RED; b < ALPHA; b++)
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out[b] = in[b];
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}
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out[ALPHA] = new_alpha;
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in += 4;
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layer += 4;
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out += 4;
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if (has_mask)
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mask++;
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}
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return TRUE;
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}
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static GimpLayerModeAffectMask
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gimp_operation_replace_get_affect_mask (GimpOperationLayerMode *layer_mode)
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{
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GimpLayerModeAffectMask affect_mask = GIMP_LAYER_MODE_AFFECT_NONE;
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if (layer_mode->opacity != 0.0)
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affect_mask |= GIMP_LAYER_MODE_AFFECT_DST;
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/* if opacity != 1.0, or we have a mask, thne we also affect SRC, but this is
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* considered the case anyway, so no need for special handling.
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*/
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return affect_mask;
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}
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