mirror of https://github.com/GNOME/gimp.git
app: added initial gegl color blending mode
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cc0410a226
commit
c713e80e63
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@ -319,7 +319,6 @@ gimp_gegl_node_set_layer_mode (GeglNode *node,
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switch (mode)
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{
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case GIMP_BEHIND_MODE:
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case GIMP_COLOR_MODE:
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case GIMP_VALUE_MODE:
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case GIMP_COLOR_ERASE_MODE:
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case GIMP_ANTI_ERASE_MODE:
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@ -3,6 +3,7 @@
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*
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* gimpoperationcolormode.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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@ -22,12 +23,17 @@
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#include "config.h"
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#include <gegl-plugin.h>
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#include <cairo.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "operations-types.h"
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#include "gimpoperationcolormode.h"
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static void gimp_operation_color_mode_prepare (GeglOperation *operation);
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static gboolean gimp_operation_color_mode_process (GeglOperation *operation,
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void *in_buf,
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void *aux_buf,
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@ -55,6 +61,7 @@ gimp_operation_color_mode_class_init (GimpOperationColorModeClass *klass)
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"description", "GIMP color mode operation",
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NULL);
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operation_class->prepare = gimp_operation_color_mode_prepare;
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point_class->process = gimp_operation_color_mode_process;
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}
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@ -63,6 +70,16 @@ gimp_operation_color_mode_init (GimpOperationColorMode *self)
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{
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}
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static void
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gimp_operation_color_mode_prepare (GeglOperation *operation)
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{
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const Babl *format = babl_format ("R'G'B'A float");
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gegl_operation_set_format (operation, "input", format);
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gegl_operation_set_format (operation, "aux", format);
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gegl_operation_set_format (operation, "output", format);
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}
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static gboolean
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gimp_operation_color_mode_process (GeglOperation *operation,
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void *in_buf,
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@ -78,10 +95,28 @@ gimp_operation_color_mode_process (GeglOperation *operation,
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while (samples--)
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{
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out[RED] = in[RED];
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out[GREEN] = in[GREEN];
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out[BLUE] = in[BLUE];
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out[ALPHA] = in[ALPHA];
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gint b;
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GimpHSL layer_hsl, out_hsl;
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GimpRGB layer_rgb = {layer[0], layer[1], layer[2]};
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GimpRGB out_rgb = {in[0], in[1], in[2]};
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gfloat comp_alpha = MIN (in[ALPHA], layer[ALPHA]);
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gfloat new_alpha = in[ALPHA] + (1 - in[ALPHA]) * comp_alpha;
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gfloat ratio = comp_alpha / new_alpha;
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gimp_rgb_to_hsl (&layer_rgb, &layer_hsl);
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gimp_rgb_to_hsl (&out_rgb, &out_hsl);
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out_hsl.h = layer_hsl.h;
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out_hsl.s = layer_hsl.s;
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gimp_hsl_to_rgb (&out_hsl, &out_rgb);
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out[0] = out_rgb.r;
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out[1] = out_rgb.g;
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out[2] = out_rgb.b;
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out[3] = in[3];
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for (b = RED; b < ALPHA; b++)
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out[b] = out[b] * ratio + in[b] * (1 - ratio) + 0.0001;
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in += 4;
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layer += 4;
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