b23f231a1a
The four remaining "classic" color tools (Brightness-Contrast, Curves, Levels and Threshold) are in fact just special UIs for otherwise completely normal filter ops. Add normal filter actions for them and invoke them like all other filters, which makes them show up in the filter history automatically. The only small hack needed is to special case them in gimp_gegl_procedure_execute_async() so the right tools are created instead of the default GimpOperationTool. Also, blacklist the automatically generated tools actions from action search and the shortcut editor.
141 lines
5.4 KiB
C
141 lines
5.4 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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* gimpoperationbrightnesscontrast.c
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* Copyright (C) 2012 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 <cairo.h>
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#include <gegl.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "libgimpmath/gimpmath.h"
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#include "operations-types.h"
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#include "gimpbrightnesscontrastconfig.h"
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#include "gimpoperationbrightnesscontrast.h"
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#include "gimp-intl.h"
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static gboolean gimp_operation_brightness_contrast_process (GeglOperation *operation,
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void *in_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 (GimpOperationBrightnessContrast, gimp_operation_brightness_contrast,
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GIMP_TYPE_OPERATION_POINT_FILTER)
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#define parent_class gimp_operation_brightness_contrast_parent_class
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static void
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gimp_operation_brightness_contrast_class_init (GimpOperationBrightnessContrastClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GeglOperationClass *operation_class = GEGL_OPERATION_CLASS (klass);
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GeglOperationPointFilterClass *point_class = GEGL_OPERATION_POINT_FILTER_CLASS (klass);
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object_class->set_property = gimp_operation_point_filter_set_property;
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object_class->get_property = gimp_operation_point_filter_get_property;
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gegl_operation_class_set_keys (operation_class,
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"name", "gimp:brightness-contrast",
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"categories", "color",
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"description", _("Adjust brightness and contrast"),
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NULL);
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point_class->process = gimp_operation_brightness_contrast_process;
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g_object_class_install_property (object_class,
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GIMP_OPERATION_POINT_FILTER_PROP_CONFIG,
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g_param_spec_object ("config",
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"Config",
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"The config object",
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GIMP_TYPE_BRIGHTNESS_CONTRAST_CONFIG,
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G_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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}
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static void
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gimp_operation_brightness_contrast_init (GimpOperationBrightnessContrast *self)
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{
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}
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static inline gfloat
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gimp_operation_brightness_contrast_map (gfloat value,
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gdouble brightness,
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gdouble slant)
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{
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/* apply brightness */
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if (brightness < 0.0)
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value = value * (1.0 + brightness);
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else
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value = value + ((1.0 - value) * brightness);
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value = (value - 0.5) * slant + 0.5;
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return value;
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}
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static gboolean
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gimp_operation_brightness_contrast_process (GeglOperation *operation,
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void *in_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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GimpOperationPointFilter *point = GIMP_OPERATION_POINT_FILTER (operation);
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GimpBrightnessContrastConfig *config = GIMP_BRIGHTNESS_CONTRAST_CONFIG (point->config);
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gfloat *src = in_buf;
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gfloat *dest = out_buf;
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gdouble brightness;
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gdouble slant;
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if (! config)
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return FALSE;
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brightness = config->brightness / 2.0;
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slant = tan ((config->contrast + 1) * G_PI_4);
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while (samples--)
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{
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dest[RED] = gimp_operation_brightness_contrast_map (src[RED],
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brightness,
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slant);
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dest[GREEN] = gimp_operation_brightness_contrast_map (src[GREEN],
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brightness,
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slant);
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dest[BLUE] = gimp_operation_brightness_contrast_map (src[BLUE],
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brightness,
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slant);
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dest[ALPHA] = src[ALPHA];
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src += 4;
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dest += 4;
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}
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return TRUE;
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}
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