diff options
Diffstat (limited to 'modules/display-filter-high-contrast.c')
| -rw-r--r-- | modules/display-filter-high-contrast.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/modules/display-filter-high-contrast.c b/modules/display-filter-high-contrast.c new file mode 100644 index 0000000..7cf1ac0 --- /dev/null +++ b/modules/display-filter-high-contrast.c @@ -0,0 +1,228 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1999 Manish Singh <yosh@gimp.org> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <gegl.h> +#include <gtk/gtk.h> + +#include "libgimpcolor/gimpcolor.h" +#include "libgimpconfig/gimpconfig.h" +#include "libgimpmath/gimpmath.h" +#include "libgimpmodule/gimpmodule.h" +#include "libgimpwidgets/gimpwidgets.h" + +#include "libgimp/libgimp-intl.h" + + +#define DEFAULT_CONTRAST 1.0 + + +#define CDISPLAY_TYPE_CONTRAST (cdisplay_contrast_get_type ()) +#define CDISPLAY_CONTRAST(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), CDISPLAY_TYPE_CONTRAST, CdisplayContrast)) +#define CDISPLAY_CONTRAST_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), CDISPLAY_TYPE_CONTRAST, CdisplayContrastClass)) +#define CDISPLAY_IS_CONTRAST(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CDISPLAY_TYPE_CONTRAST)) +#define CDISPLAY_IS_CONTRAST_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), CDISPLAY_TYPE_CONTRAST)) + + +typedef struct _CdisplayContrast CdisplayContrast; +typedef struct _CdisplayContrastClass CdisplayContrastClass; + +struct _CdisplayContrast +{ + GimpColorDisplay parent_instance; + + gdouble contrast; +}; + +struct _CdisplayContrastClass +{ + GimpColorDisplayClass parent_instance; +}; + + +enum +{ + PROP_0, + PROP_CONTRAST +}; + + +static GType cdisplay_contrast_get_type (void); + +static void cdisplay_contrast_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void cdisplay_contrast_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); + +static void cdisplay_contrast_convert_buffer (GimpColorDisplay *display, + GeglBuffer *buffer, + GeglRectangle *area); +static void cdisplay_contrast_set_contrast (CdisplayContrast *contrast, + gdouble value); + + +static const GimpModuleInfo cdisplay_contrast_info = +{ + GIMP_MODULE_ABI_VERSION, + N_("High Contrast color display filter"), + "Jay Cox <jaycox@gimp.org>", + "v0.2", + "(c) 2000, released under the GPL", + "October 14, 2000" +}; + + +G_DEFINE_DYNAMIC_TYPE (CdisplayContrast, cdisplay_contrast, + GIMP_TYPE_COLOR_DISPLAY) + + +G_MODULE_EXPORT const GimpModuleInfo * +gimp_module_query (GTypeModule *module) +{ + return &cdisplay_contrast_info; +} + +G_MODULE_EXPORT gboolean +gimp_module_register (GTypeModule *module) +{ + cdisplay_contrast_register_type (module); + + return TRUE; +} + +static void +cdisplay_contrast_class_init (CdisplayContrastClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpColorDisplayClass *display_class = GIMP_COLOR_DISPLAY_CLASS (klass); + + object_class->get_property = cdisplay_contrast_get_property; + object_class->set_property = cdisplay_contrast_set_property; + + GIMP_CONFIG_PROP_DOUBLE (object_class, PROP_CONTRAST, + "contrast", + _("Contrast cycles"), + NULL, + 0.01, 10.0, DEFAULT_CONTRAST, + 0); + + display_class->name = _("Contrast"); + display_class->help_id = "gimp-colordisplay-contrast"; + display_class->icon_name = GIMP_ICON_DISPLAY_FILTER_CONTRAST; + + display_class->convert_buffer = cdisplay_contrast_convert_buffer; +} + +static void +cdisplay_contrast_class_finalize (CdisplayContrastClass *klass) +{ +} + +static void +cdisplay_contrast_init (CdisplayContrast *contrast) +{ +} + +static void +cdisplay_contrast_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + CdisplayContrast *contrast = CDISPLAY_CONTRAST (object); + + switch (property_id) + { + case PROP_CONTRAST: + g_value_set_double (value, contrast->contrast); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +cdisplay_contrast_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + CdisplayContrast *contrast = CDISPLAY_CONTRAST (object); + + switch (property_id) + { + case PROP_CONTRAST: + cdisplay_contrast_set_contrast (contrast, g_value_get_double (value)); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +cdisplay_contrast_convert_buffer (GimpColorDisplay *display, + GeglBuffer *buffer, + GeglRectangle *area) +{ + CdisplayContrast *contrast = CDISPLAY_CONTRAST (display); + GeglBufferIterator *iter; + gfloat c; + + c = contrast->contrast * 2 * G_PI; + + iter = gegl_buffer_iterator_new (buffer, area, 0, + babl_format ("R'G'B'A float"), + GEGL_ACCESS_READWRITE, GEGL_ABYSS_NONE, 1); + + while (gegl_buffer_iterator_next (iter)) + { + gfloat *data = iter->items[0].data; + gint count = iter->length; + + while (count--) + { + *data = 0.5 * (1.0 + sin (c * *data)); data++; + *data = 0.5 * (1.0 + sin (c * *data)); data++; + *data = 0.5 * (1.0 + sin (c * *data)); data++; + + data++; + } + } +} + +static void +cdisplay_contrast_set_contrast (CdisplayContrast *contrast, + gdouble value) +{ + if (value <= 0.0) + value = 1.0; + + if (value != contrast->contrast) + { + contrast->contrast = value; + + g_object_notify (G_OBJECT (contrast), "contrast"); + gimp_color_display_changed (GIMP_COLOR_DISPLAY (contrast)); + } +} |