41fff6990e
Implement a common utility function gimp_blend_composite that uses utility functions for implementing layer modes, with separate (possibly SIMD) optimized loops for blending and compositing, with configured linear TRC, perceptual gamma TRC or even using CIE Lab as the space.
141 lines
5.0 KiB
C
141 lines
5.0 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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* gimpoperationscreenlegacy.c
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* Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
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* 2012 Ville Sokk <ville.sokk@gmail.com>
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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 "gimpoperationscreenlegacy.h"
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static gboolean gimp_operation_screen_legacy_process (GeglOperation *operation,
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void *in_buf,
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void *aux_buf,
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void *aux2_buf,
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void *out_buf,
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glong samples,
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const GeglRectangle *roi,
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gint level);
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G_DEFINE_TYPE (GimpOperationScreenLegacy, gimp_operation_screen_legacy,
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GIMP_TYPE_OPERATION_POINT_LAYER_MODE)
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static void
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gimp_operation_screen_legacy_class_init (GimpOperationScreenLegacyClass *klass)
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{
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GeglOperationClass *operation_class;
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GeglOperationPointComposer3Class *point_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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gegl_operation_class_set_keys (operation_class,
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"name", "gimp:screen-legacy",
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"description", "GIMP screen mode operation",
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NULL);
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point_class->process = gimp_operation_screen_legacy_process;
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}
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static void
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gimp_operation_screen_legacy_init (GimpOperationScreenLegacy *self)
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{
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}
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static gboolean
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gimp_operation_screen_legacy_process (GeglOperation *operation,
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void *in_buf,
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void *aux_buf,
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void *aux2_buf,
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void *out_buf,
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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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GimpOperationPointLayerMode *layer_mode = (GimpOperationPointLayerMode*)operation;
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return gimp_operation_screen_legacy_process_pixels (in_buf, aux_buf, aux2_buf, out_buf, layer_mode->opacity, samples, roi, level, layer_mode->blend_trc, layer_mode->composite_trc, layer_mode->composite_mode);
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}
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gboolean
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gimp_operation_screen_legacy_process_pixels (gfloat *in,
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gfloat *layer,
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gfloat *mask,
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gfloat *out,
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gfloat opacity,
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glong samples,
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const GeglRectangle *roi,
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gint level,
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GimpLayerBlendTRC blend_trc,
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GimpLayerBlendTRC composite_trc,
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GimpLayerCompositeMode composite_mode)
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{
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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 comp_alpha, new_alpha;
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comp_alpha = MIN (in[ALPHA], layer[ALPHA]) * opacity;
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if (has_mask)
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comp_alpha *= *mask;
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new_alpha = in[ALPHA] + (1.0 - in[ALPHA]) * comp_alpha;
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if (comp_alpha && new_alpha)
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{
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gfloat ratio = comp_alpha / new_alpha;
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gint b;
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for (b = RED; b < ALPHA; b++)
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{
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gfloat comp = 1.0 - (1.0 - in[b]) * (1.0 - layer[b]);
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out[b] = comp * ratio + in[b] * (1.0 - ratio);
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}
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}
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else
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{
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gint b;
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for (b = RED; b < ALPHA; b++)
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{
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out[b] = in[b];
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}
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}
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out[ALPHA] = in[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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