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- /* Watercolor color_select_module, Raph Levien <raph@acm.org>, February 1998
- *
- * Ported to loadable color-selector, Sven Neumann <sven@gimp.org>, May 1999
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include "config.h"
- #include <stdlib.h>
- #include <stdio.h>
- #ifdef __GNUC__
- #warning GTK_DISABLE_DEPRECATED
- #endif
- #undef GTK_DISABLE_DEPRECATED
- #include <gtk/gtk.h>
- #include "libgimpcolor/gimpcolor.h"
- #include "libgimpmath/gimpmath.h"
- #include "libgimpmodule/gimpmodule.h"
- #include "libgimpwidgets/gimpwidgets.h"
- #include "libgimp/libgimp-intl.h"
- /* definitions and variables */
- #define IMAGE_SIZE GIMP_COLOR_SELECTOR_SIZE
- #define COLORSEL_TYPE_WATER (colorsel_water_type)
- #define COLORSEL_WATER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), COLORSEL_TYPE_WATER, ColorselWater))
- #define COLORSEL_WATER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), COLORSEL_TYPE_WATER, ColorselWaterClass))
- #define COLORSEL_IS_WATER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), COLORSEL_TYPE_WATER))
- #define COLORSEL_IS_WATER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), COLORSEL_TYPE_WATER))
- typedef struct _ColorselWater ColorselWater;
- typedef struct _ColorselWaterClass ColorselWaterClass;
- struct _ColorselWater
- {
- GimpColorSelector parent_instance;
- gdouble last_x;
- gdouble last_y;
- gdouble last_pressure;
- gfloat pressure_adjust;
- guint32 motion_time;
- gint button_state;
- };
- struct _ColorselWaterClass
- {
- GimpColorSelectorClass parent_class;
- };
- static GType colorsel_water_get_type (GTypeModule *module);
- static void colorsel_water_class_init (ColorselWaterClass *klass);
- static void colorsel_water_init (ColorselWater *water);
- static void colorsel_water_finalize (GObject *object);
- static void colorsel_water_set_color (GimpColorSelector *selector,
- const GimpRGB *rgb,
- const GimpHSV *hsv);
- static void select_area_draw (GtkWidget *preview);
- static gboolean button_press_event (GtkWidget *widget,
- GdkEventButton *event,
- ColorselWater *water);
- static gboolean button_release_event (GtkWidget *widget,
- GdkEventButton *event,
- ColorselWater *water);
- static gboolean motion_notify_event (GtkWidget *widget,
- GdkEventMotion *event,
- ColorselWater *water);
- static gboolean proximity_out_event (GtkWidget *widget,
- GdkEventProximity *event,
- ColorselWater *water);
- static void pressure_adjust_update (GtkAdjustment *adj,
- ColorselWater *water);
- static const GimpModuleInfo colorsel_water_info =
- {
- GIMP_MODULE_ABI_VERSION,
- N_("Watercolor style color selector"),
- "Raph Levien <raph@acm.org>, Sven Neumann <sven@gimp.org>",
- "v0.3",
- "(c) 1998-1999, released under the GPL",
- "May, 10 1999"
- };
- static const GtkTargetEntry targets[] =
- {
- { "application/x-color", 0 }
- };
- static GType colorsel_water_type = 0;
- static GimpColorSelectorClass *parent_class = NULL;
- G_MODULE_EXPORT const GimpModuleInfo *
- gimp_module_query (GTypeModule *module)
- {
- return &colorsel_water_info;
- }
- G_MODULE_EXPORT gboolean
- gimp_module_register (GTypeModule *module)
- {
- colorsel_water_get_type (module);
- return TRUE;
- }
- static GType
- colorsel_water_get_type (GTypeModule *module)
- {
- if (! colorsel_water_type)
- {
- static const GTypeInfo select_info =
- {
- sizeof (ColorselWaterClass),
- (GBaseInitFunc) NULL,
- (GBaseFinalizeFunc) NULL,
- (GClassInitFunc) colorsel_water_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (ColorselWater),
- 0, /* n_preallocs */
- (GInstanceInitFunc) colorsel_water_init,
- };
- colorsel_water_type =
- g_type_module_register_type (module,
- GIMP_TYPE_COLOR_SELECTOR,
- "ColorselWater",
- &select_info, 0);
- }
- return colorsel_water_type;
- }
- static void
- colorsel_water_class_init (ColorselWaterClass *klass)
- {
- GObjectClass *object_class;
- GimpColorSelectorClass *selector_class;
- object_class = G_OBJECT_CLASS (klass);
- selector_class = GIMP_COLOR_SELECTOR_CLASS (klass);
- parent_class = g_type_class_peek_parent (klass);
- object_class->finalize = colorsel_water_finalize;
- selector_class->name = _("_Watercolor");
- selector_class->help_page = "watercolor.html";
- selector_class->stock_id = GIMP_STOCK_TOOL_PAINTBRUSH;
- selector_class->set_color = colorsel_water_set_color;
- }
- static void
- colorsel_water_init (ColorselWater *water)
- {
- GtkWidget *preview;
- GtkWidget *event_box;
- GtkWidget *frame;
- GtkWidget *hbox;
- GtkWidget *hbox2;
- GtkObject *adj;
- GtkWidget *scale;
- water->pressure_adjust = 1.0;
- hbox = gtk_hbox_new (FALSE, 0);
- gtk_box_pack_start (GTK_BOX (water), hbox, TRUE, FALSE, 0);
- hbox2 = gtk_hbox_new (FALSE, 4);
- gtk_box_pack_start (GTK_BOX (hbox), hbox2, TRUE, FALSE, 0);
- /* the event box */
- frame = gtk_frame_new (NULL);
- gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
- gtk_box_pack_start (GTK_BOX (hbox2), frame, FALSE, FALSE, 0);
- event_box = gtk_event_box_new ();
- gtk_container_add (GTK_CONTAINER (frame), event_box);
- preview = gtk_preview_new (GTK_PREVIEW_COLOR);
- gtk_preview_size (GTK_PREVIEW (preview), IMAGE_SIZE, IMAGE_SIZE);
- gtk_container_add (GTK_CONTAINER (event_box), preview);
- select_area_draw (preview);
- /* Event signals */
- g_signal_connect (event_box, "motion_notify_event",
- G_CALLBACK (motion_notify_event),
- water);
- g_signal_connect (event_box, "button_press_event",
- G_CALLBACK (button_press_event),
- water);
- g_signal_connect (event_box, "button_release_event",
- G_CALLBACK (button_release_event),
- water);
- g_signal_connect (event_box, "proximity_out_event",
- G_CALLBACK (proximity_out_event),
- water);
- gtk_widget_set_events (event_box,
- GDK_EXPOSURE_MASK |
- GDK_LEAVE_NOTIFY_MASK |
- GDK_BUTTON_PRESS_MASK |
- GDK_KEY_PRESS_MASK |
- GDK_POINTER_MOTION_MASK |
- GDK_POINTER_MOTION_HINT_MASK |
- GDK_PROXIMITY_OUT_MASK);
- /* The following call enables tracking and processing of extension
- * events for the drawing area
- */
- gtk_widget_set_extension_events (event_box, GDK_EXTENSION_EVENTS_ALL);
- gtk_widget_grab_focus (event_box);
- adj = gtk_adjustment_new (200.0 - water->pressure_adjust * 100.0,
- 0.0, 200.0, 1.0, 1.0, 0.0);
- g_signal_connect (adj, "value_changed",
- G_CALLBACK (pressure_adjust_update),
- water);
- scale = gtk_vscale_new (GTK_ADJUSTMENT (adj));
- gtk_scale_set_digits (GTK_SCALE (scale), 0);
- gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE);
- gimp_help_set_help_data (scale, _("Pressure"), NULL);
- gtk_box_pack_start (GTK_BOX (hbox2), scale, FALSE, FALSE, 0);
- gtk_widget_show_all (hbox);
- }
- static void
- colorsel_water_finalize (GObject *object)
- {
- ColorselWater *water;
- water = COLORSEL_WATER (object);
- G_OBJECT_CLASS (parent_class)->finalize (object);
- }
- static void
- colorsel_water_set_color (GimpColorSelector *selector,
- const GimpRGB *rgb,
- const GimpHSV *hsv)
- {
- ColorselWater *water;
- water = COLORSEL_WATER (selector);
- }
- static gdouble
- calc (gdouble x,
- gdouble y,
- gdouble angle)
- {
- gdouble s, c;
- s = 1.6 * sin (angle * G_PI / 180) * 256.0 / IMAGE_SIZE;
- c = 1.6 * cos (angle * G_PI / 180) * 256.0 / IMAGE_SIZE;
- return 128 + (x - (IMAGE_SIZE >> 1)) * c - (y - (IMAGE_SIZE >> 1)) * s;
- }
- /* Initialize the preview */
- static void
- select_area_draw (GtkWidget *preview)
- {
- guchar buf[3 * IMAGE_SIZE];
- gint x, y;
- gdouble r, g, b;
- gdouble dr, dg, db;
- for (y = 0; y < IMAGE_SIZE; y++)
- {
- r = calc (0, y, 0);
- g = calc (0, y, 120);
- b = calc (0, y, 240);
- dr = calc (1, y, 0) - r;
- dg = calc (1, y, 120) - g;
- db = calc (1, y, 240) - b;
- for (x = 0; x < IMAGE_SIZE; x++)
- {
- buf[x * 3] = CLAMP ((gint) r, 0, 255);
- buf[x * 3 + 1] = CLAMP ((gint) g, 0, 255);
- buf[x * 3 + 2] = CLAMP ((gint) b, 0, 255);
- r += dr;
- g += dg;
- b += db;
- }
- gtk_preview_draw_row (GTK_PREVIEW (preview), buf, 0, y, IMAGE_SIZE);
- }
- }
- static void
- add_pigment (ColorselWater *water,
- gboolean erase,
- gdouble x,
- gdouble y,
- gdouble much)
- {
- GimpColorSelector *selector;
- gdouble r, g, b;
- selector = GIMP_COLOR_SELECTOR (water);
- much *= (gdouble) water->pressure_adjust;
- if (erase)
- {
- selector->rgb.r = 1 - (1 - selector->rgb.r) * (1 - much);
- selector->rgb.g = 1 - (1 - selector->rgb.g) * (1 - much);
- selector->rgb.b = 1 - (1 - selector->rgb.b) * (1 - much);
- }
- else
- {
- r = calc (x, y, 0) / 255.0;
- if (r < 0) r = 0;
- if (r > 1) r = 1;
- g = calc (x, y, 120) / 255.0;
- if (g < 0) g = 0;
- if (g > 1) g = 1;
- b = calc (x, y, 240) / 255.0;
- if (b < 0) b = 0;
- if (b > 1) b = 1;
- selector->rgb.r *= (1 - (1 - r) * much);
- selector->rgb.g *= (1 - (1 - g) * much);
- selector->rgb.b *= (1 - (1 - b) * much);
- }
- gimp_rgb_to_hsv (&selector->rgb, &selector->hsv);
- gimp_color_selector_color_changed (selector);
- }
- static void
- draw_brush (ColorselWater *water,
- GtkWidget *widget,
- gboolean erase,
- gdouble x,
- gdouble y,
- gdouble pressure)
- {
- gdouble much; /* how much pigment to mix in */
- if (pressure < water->last_pressure)
- water->last_pressure = pressure;
- much = sqrt ((x - water->last_x) * (x - water->last_x) +
- (y - water->last_y) * (y - water->last_y) +
- 1000 *
- (pressure - water->last_pressure) *
- (pressure - water->last_pressure));
- much *= pressure * 0.05;
- add_pigment (water, erase, x, y, much);
- water->last_x = x;
- water->last_y = y;
- water->last_pressure = pressure;
- }
- static gboolean
- button_press_event (GtkWidget *widget,
- GdkEventButton *event,
- ColorselWater *water)
- {
- gboolean erase = FALSE;
- water->last_x = event->x;
- water->last_y = event->y;
- water->last_pressure = 0.5;
- gdk_event_get_axis ((GdkEvent *) event, GDK_AXIS_PRESSURE,
- &water->last_pressure);
- water->button_state |= 1 << event->button;
- erase = (event->button != 1) || FALSE;
- /* FIXME: (event->source == GDK_SOURCE_ERASER) */
- add_pigment (water, erase, event->x, event->y, 0.05);
- water->motion_time = event->time;
- return FALSE;
- }
- static gboolean
- button_release_event (GtkWidget *widget,
- GdkEventButton *event,
- ColorselWater *water)
- {
- water->button_state &= ~(1 << event->button);
- return TRUE;
- }
- static gboolean
- motion_notify_event (GtkWidget *widget,
- GdkEventMotion *event,
- ColorselWater *water)
- {
- GdkTimeCoord **coords;
- gint nevents;
- gint i;
- gboolean erase;
- if (event->state & (GDK_BUTTON1_MASK |
- GDK_BUTTON2_MASK |
- GDK_BUTTON3_MASK |
- GDK_BUTTON4_MASK))
- {
- guint32 last_motion_time;
- last_motion_time = event->time;
- erase = ((event->state &
- (GDK_BUTTON2_MASK | GDK_BUTTON3_MASK | GDK_BUTTON4_MASK)) ||
- FALSE);
- /* FIXME: (event->source == GDK_SOURCE_ERASER) */
- water->motion_time = event->time;
- if (gdk_device_get_history (event->device,
- event->window,
- last_motion_time,
- event->time,
- &coords,
- &nevents))
- {
- for (i = 0; i < nevents; i++)
- {
- gdouble x = 0.0;
- gdouble y = 0.0;
- gdouble pressure = 0.5;
- gdk_device_get_axis (event->device, coords[i]->axes,
- GDK_AXIS_X, &x);
- gdk_device_get_axis (event->device, coords[i]->axes,
- GDK_AXIS_Y, &y);
- gdk_device_get_axis (event->device, coords[i]->axes,
- GDK_AXIS_PRESSURE, &pressure);
- draw_brush (water, widget, erase, x, y, pressure);
- }
- g_free (coords);
- }
- else
- {
- gdouble pressure = 0.5;
- gdk_event_get_axis ((GdkEvent *) event, GDK_AXIS_PRESSURE, &pressure);
- draw_brush (water, widget, erase, event->x, event->y, pressure);
- }
- }
- if (event->is_hint)
- gdk_device_get_state (event->device, event->window, NULL, NULL);
- return TRUE;
- }
- static gboolean
- proximity_out_event (GtkWidget *widget,
- GdkEventProximity *event,
- ColorselWater *water)
- {
- return TRUE;
- }
- static void
- pressure_adjust_update (GtkAdjustment *adj,
- ColorselWater *water)
- {
- water->pressure_adjust = (adj->upper - adj->value) / 100.0;
- }
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