dnrops
/
gimp
mirror of https://github.com/GNOME/gimp.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
gimp/modules/colorsel_water.c

511 lines
14 KiB
C
Raw Blame History

/* 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;
}
Reference in New Issue View Git Blame Copy Permalink