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51710aa378
2005-02-15 Sven Neumann <sven@gimp.org> * app/core/gimpimagemap.[ch]: changed GimpImageMapApplyFunc to be compatible with PixelProcessorFunc. * app/base/color-balance.[ch] * app/base/colorize.[ch] * app/base/gimplut.[ch] * app/base/hue-saturation.[ch] * app/base/threshold.[ch]: removed wrappers that used to shift parameters around to match GimpImageMapApplyFunc and PixelProcessorFunc signatures. * app/tools/gimpbrightnesscontrasttool.c * app/tools/gimpcolorbalancetool.c * app/tools/gimpcurvestool.c * app/tools/gimplevelstool.c * app/tools/gimpposterizetool.c * app/tools/gimpthresholdtool.c: changed accordingly. * tools/pdbgen/pdb/color.pdb: use pixel_region_process_parallel() for all color operations. * app/pdb/color_cmds.c: regenerated.
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <glib-object.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "libgimpmath/gimpmath.h"
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#include "base-types.h"
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#include "colorize.h"
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#include "pixel-region.h"
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void
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colorize_init (Colorize *colorize)
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{
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gint i;
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g_return_if_fail (colorize != NULL);
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colorize->hue = 180.0;
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colorize->saturation = 50.0;
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colorize->lightness = 0.0;
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for (i = 0; i < 256; i ++)
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{
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colorize->lum_red_lookup[i] = i * GIMP_RGB_INTENSITY_RED;
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colorize->lum_green_lookup[i] = i * GIMP_RGB_INTENSITY_GREEN;
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colorize->lum_blue_lookup[i] = i * GIMP_RGB_INTENSITY_BLUE;
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}
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}
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void
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colorize_calculate (Colorize *colorize)
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{
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GimpHSL hsl;
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GimpRGB rgb;
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gint i;
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g_return_if_fail (colorize != NULL);
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hsl.h = colorize->hue / 360.0;
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hsl.s = colorize->saturation / 100.0;
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/* Calculate transfers */
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for (i = 0; i < 256; i ++)
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{
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hsl.l = (gdouble) i / 255.0;
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gimp_hsl_to_rgb (&hsl, &rgb);
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colorize->final_red_lookup[i] = i * rgb.r;
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colorize->final_green_lookup[i] = i * rgb.g;
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colorize->final_blue_lookup[i] = i * rgb.b;
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}
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}
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void
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colorize (Colorize *colorize,
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PixelRegion *srcPR,
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PixelRegion *destPR)
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{
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const guchar *src, *s;
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guchar *dest, *d;
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gboolean alpha;
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gint w, h;
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gint lum;
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/* Set the transfer arrays (for speed) */
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h = srcPR->h;
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src = srcPR->data;
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dest = destPR->data;
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alpha = (srcPR->bytes == 4) ? TRUE : FALSE;
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while (h--)
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{
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w = srcPR->w;
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s = src;
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d = dest;
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while (w--)
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{
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lum = (colorize->lum_red_lookup[s[RED_PIX]] +
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colorize->lum_green_lookup[s[GREEN_PIX]] +
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colorize->lum_blue_lookup[s[BLUE_PIX]]); /* luminosity */
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if (colorize->lightness > 0)
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{
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lum = (gdouble) lum * (100.0 - colorize->lightness) / 100.0;
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lum += 255 - (100.0 - colorize->lightness) * 255.0 / 100.0;
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}
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else if (colorize->lightness < 0)
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{
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lum = (gdouble) lum * (colorize->lightness + 100.0) / 100.0;
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}
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d[RED_PIX] = colorize->final_red_lookup[lum];
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d[GREEN_PIX] = colorize->final_green_lookup[lum];
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d[BLUE_PIX] = colorize->final_blue_lookup[lum];
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if (alpha)
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d[ALPHA_PIX] = s[ALPHA_PIX];
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s += srcPR->bytes;
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d += destPR->bytes;
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}
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src += srcPR->rowstride;
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dest += destPR->rowstride;
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}
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}
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