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gimp/libgimpwidgets/gimpcolorselect.c

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/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpcolorselect.c
* Copyright (C) 2002 Michael Natterer <mitch@gimp.org>
*
* based on color_notebook module
* Copyright (C) 1998 Austin Donnelly <austin@greenend.org.uk>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpbase/gimpbase.h"
#include "libgimpcolor/gimpcolor.h"
#include "libgimpmath/gimpmath.h"
#include "gimpwidgetstypes.h"
#include "gimpcolorselector.h"
#include "gimpcolorselect.h"
#include "gimphelpui.h"
#include "gimppreviewarea.h"
#include "gimpstock.h"
#include "libgimp/libgimp-intl.h"
/**
* SECTION: gimpcolorselect
* @title: GimpColorSelect
* @short_description: A #GimpColorSelector implementation.
*
* The #GimpColorSelect widget is an implementation of a
* #GimpColorSelector. It shows a square area that allows to
* interactively change two color channels and a smaller area to
* change the third channel. You can select which channel should be
* the third by calling gimp_color_selector_set_channel(). The widget
* will then change the other two channels accordingly.
**/
#define COLOR_AREA_EVENT_MASK (GDK_EXPOSURE_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON_MOTION_MASK | \
GDK_ENTER_NOTIFY_MASK)
typedef enum
{
COLOR_SELECT_HUE = 0,
COLOR_SELECT_SATURATION,
COLOR_SELECT_VALUE,
COLOR_SELECT_RED,
COLOR_SELECT_GREEN,
COLOR_SELECT_BLUE,
COLOR_SELECT_ALPHA,
COLOR_SELECT_HUE_SATURATION,
COLOR_SELECT_HUE_VALUE,
COLOR_SELECT_SATURATION_VALUE,
COLOR_SELECT_RED_GREEN,
COLOR_SELECT_RED_BLUE,
COLOR_SELECT_GREEN_BLUE
} ColorSelectFillType;
typedef enum
{
UPDATE_VALUES = 1 << 0,
UPDATE_POS = 1 << 1,
UPDATE_XY_COLOR = 1 << 2,
UPDATE_Z_COLOR = 1 << 3,
UPDATE_CALLER = 1 << 6
} ColorSelectUpdateType;
typedef enum
{
DRAG_NONE,
DRAG_XY,
DRAG_Z
} ColorSelectDragMode;
#define GIMP_COLOR_SELECT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_COLOR_SELECT, GimpColorSelectClass))
#define GIMP_IS_COLOR_SELECT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_COLOR_SELECT))
#define GIMP_COLOR_SELECT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_COLOR_SELECT, GimpColorSelectClass))
typedef struct _GimpColorSelectClass GimpColorSelectClass;
struct _GimpColorSelect
{
GimpColorSelector parent_instance;
GtkWidget *toggle_box;
GtkWidget *xy_color;
GtkWidget *z_color;
gint pos[3];
ColorSelectFillType z_color_fill;
ColorSelectFillType xy_color_fill;
ColorSelectDragMode drag_mode;
};
struct _GimpColorSelectClass
{
GimpColorSelectorClass parent_class;
};
typedef struct _ColorSelectFill ColorSelectFill;
typedef void (* ColorSelectFillUpdateProc) (ColorSelectFill *color_select_fill);
struct _ColorSelectFill
{
guchar *buffer;
gint y;
gint width;
gint height;
GimpRGB rgb;
GimpHSV hsv;
ColorSelectFillUpdateProc update;
};
static void gimp_color_select_togg_visible (GimpColorSelector *selector,
gboolean visible);
static void gimp_color_select_togg_sensitive (GimpColorSelector *selector,
gboolean sensitive);
static void gimp_color_select_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv);
static void gimp_color_select_set_channel (GimpColorSelector *selector,
GimpColorSelectorChannel channel);
static void gimp_color_select_channel_toggled (GtkWidget *widget,
GimpColorSelect *select);
static void gimp_color_select_update (GimpColorSelect *select,
ColorSelectUpdateType type);
static void gimp_color_select_update_values (GimpColorSelect *select);
static void gimp_color_select_update_pos (GimpColorSelect *select);
#if 0
static void gimp_color_select_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data);
#endif
static void gimp_color_select_xy_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select);
static gboolean gimp_color_select_xy_expose (GtkWidget *widget,
GdkEventExpose *eevent,
GimpColorSelect *select);
static gboolean gimp_color_select_xy_events (GtkWidget *widget,
GdkEvent *event,
GimpColorSelect *select);
static void gimp_color_select_z_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select);
static gboolean gimp_color_select_z_expose (GtkWidget *widget,
GdkEventExpose *eevent,
GimpColorSelect *select);
static gboolean gimp_color_select_z_events (GtkWidget *widet,
GdkEvent *event,
GimpColorSelect *select);
static void gimp_color_select_image_fill (GtkWidget *widget,
ColorSelectFillType fill_type,
const GimpHSV *hsv,
const GimpRGB *rgb);
static void color_select_update_red (ColorSelectFill *csf);
static void color_select_update_green (ColorSelectFill *csf);
static void color_select_update_blue (ColorSelectFill *csf);
static void color_select_update_hue (ColorSelectFill *csf);
static void color_select_update_saturation (ColorSelectFill *csf);
static void color_select_update_value (ColorSelectFill *csf);
static void color_select_update_red_green (ColorSelectFill *csf);
static void color_select_update_red_blue (ColorSelectFill *csf);
static void color_select_update_green_blue (ColorSelectFill *csf);
static void color_select_update_hue_saturation (ColorSelectFill *csf);
static void color_select_update_hue_value (ColorSelectFill *csf);
static void color_select_update_saturation_value (ColorSelectFill *csf);
G_DEFINE_TYPE (GimpColorSelect, gimp_color_select, GIMP_TYPE_COLOR_SELECTOR)
#define parent_class gimp_color_select_parent_class
static const ColorSelectFillUpdateProc update_procs[] =
{
color_select_update_hue,
color_select_update_saturation,
color_select_update_value,
color_select_update_red,
color_select_update_green,
color_select_update_blue,
NULL, /* alpha */
color_select_update_hue_saturation,
color_select_update_hue_value,
color_select_update_saturation_value,
color_select_update_red_green,
color_select_update_red_blue,
color_select_update_green_blue,
};
static void
gimp_color_select_class_init (GimpColorSelectClass *klass)
{
GimpColorSelectorClass *selector_class = GIMP_COLOR_SELECTOR_CLASS (klass);
selector_class->name = "GIMP";
selector_class->help_id = "gimp-colorselector-gimp";
selector_class->stock_id = GIMP_STOCK_WILBER;
selector_class->set_toggles_visible = gimp_color_select_togg_visible;
selector_class->set_toggles_sensitive = gimp_color_select_togg_sensitive;
selector_class->set_color = gimp_color_select_set_color;
selector_class->set_channel = gimp_color_select_set_channel;
}
static void
gimp_color_select_init (GimpColorSelect *select)
{
GtkWidget *hbox;
GtkWidget *frame;
select->z_color_fill = COLOR_SELECT_HUE;
select->xy_color_fill = COLOR_SELECT_SATURATION_VALUE;
select->drag_mode = DRAG_NONE;
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (select), hbox, TRUE, TRUE, 0);
gtk_widget_show (hbox);
/* The x/y component preview */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
select->xy_color = gimp_preview_area_new ();
gtk_widget_set_size_request (select->xy_color,
GIMP_COLOR_SELECTOR_SIZE,
GIMP_COLOR_SELECTOR_SIZE);
gtk_widget_set_events (select->xy_color, COLOR_AREA_EVENT_MASK);
gtk_container_add (GTK_CONTAINER (frame), select->xy_color);
gtk_widget_show (select->xy_color);
g_signal_connect (select->xy_color, "size-allocate",
G_CALLBACK (gimp_color_select_xy_size_allocate),
select);
g_signal_connect_after (select->xy_color, "expose-event",
G_CALLBACK (gimp_color_select_xy_expose),
select);
g_signal_connect (select->xy_color, "event",
G_CALLBACK (gimp_color_select_xy_events),
select);
#if 0
gimp_dnd_color_dest_add (select->xy_color, gimp_color_select_drop_color,
select);
#endif
/* The z component preview */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
select->z_color = gimp_preview_area_new ();
gtk_widget_set_size_request (select->z_color,
GIMP_COLOR_SELECTOR_BAR_SIZE, -1);
gtk_widget_set_events (select->z_color, COLOR_AREA_EVENT_MASK);
gtk_container_add (GTK_CONTAINER (frame), select->z_color);
gtk_widget_show (select->z_color);
g_signal_connect (select->z_color, "size-allocate",
G_CALLBACK (gimp_color_select_z_size_allocate),
select);
g_signal_connect_after (select->z_color, "expose-event",
G_CALLBACK (gimp_color_select_z_expose),
select);
g_signal_connect (select->z_color, "event",
G_CALLBACK (gimp_color_select_z_events),
select);
select->toggle_box = gtk_vbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (hbox), select->toggle_box, FALSE, FALSE, 0);
gtk_widget_show (select->toggle_box);
/* channel toggles */
{
GimpColorSelectorChannel channel;
GEnumClass *enum_class;
GSList *group = NULL;
enum_class = g_type_class_ref (GIMP_TYPE_COLOR_SELECTOR_CHANNEL);
for (channel = GIMP_COLOR_SELECTOR_HUE;
channel < GIMP_COLOR_SELECTOR_ALPHA;
channel++)
{
GimpEnumDesc *enum_desc;
GtkWidget *button;
enum_desc = gimp_enum_get_desc (enum_class, channel);
button = gtk_radio_button_new_with_mnemonic (group,
gettext (enum_desc->value_desc));
group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));
gtk_toggle_button_set_mode (GTK_TOGGLE_BUTTON (button), FALSE);
gtk_box_pack_start (GTK_BOX (select->toggle_box), button,
TRUE, TRUE, 0);
gtk_widget_show (button);
g_object_set_data (G_OBJECT (button), "channel",
GINT_TO_POINTER (channel));
if (channel == GIMP_COLOR_SELECTOR_HUE)
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
gimp_help_set_help_data (button, gettext (enum_desc->value_help), NULL);
g_signal_connect (button, "toggled",
G_CALLBACK (gimp_color_select_channel_toggled),
select);
}
g_type_class_unref (enum_class);
}
}
static void
gimp_color_select_togg_visible (GimpColorSelector *selector,
gboolean visible)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
gtk_widget_set_visible (select->toggle_box, visible);
}
static void
gimp_color_select_togg_sensitive (GimpColorSelector *selector,
gboolean sensitive)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
gtk_widget_set_sensitive (select->toggle_box, sensitive);
}
static void
gimp_color_select_set_color (GimpColorSelector *selector,
const GimpRGB *rgb,
const GimpHSV *hsv)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
gimp_color_select_update (select,
UPDATE_POS | UPDATE_XY_COLOR | UPDATE_Z_COLOR);
}
static void
gimp_color_select_set_channel (GimpColorSelector *selector,
GimpColorSelectorChannel channel)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (selector);
switch ((ColorSelectFillType) channel)
{
case COLOR_SELECT_HUE:
select->z_color_fill = COLOR_SELECT_HUE;
select->xy_color_fill = COLOR_SELECT_SATURATION_VALUE;
break;
case COLOR_SELECT_SATURATION:
select->z_color_fill = COLOR_SELECT_SATURATION;
select->xy_color_fill = COLOR_SELECT_HUE_VALUE;
break;
case COLOR_SELECT_VALUE:
select->z_color_fill = COLOR_SELECT_VALUE;
select->xy_color_fill = COLOR_SELECT_HUE_SATURATION;
break;
case COLOR_SELECT_RED:
select->z_color_fill = COLOR_SELECT_RED;
select->xy_color_fill = COLOR_SELECT_GREEN_BLUE;
break;
case COLOR_SELECT_GREEN:
select->z_color_fill = COLOR_SELECT_GREEN;
select->xy_color_fill = COLOR_SELECT_RED_BLUE;
break;
case COLOR_SELECT_BLUE:
select->z_color_fill = COLOR_SELECT_BLUE;
select->xy_color_fill = COLOR_SELECT_RED_GREEN;
break;
default:
break;
}
gimp_color_select_update (select,
UPDATE_POS | UPDATE_Z_COLOR | UPDATE_XY_COLOR);
}
static void
gimp_color_select_channel_toggled (GtkWidget *widget,
GimpColorSelect *select)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget)))
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
GimpColorSelectorChannel channel;
channel = GPOINTER_TO_INT (g_object_get_data (G_OBJECT (widget),
"channel"));
selector->channel = channel;
gimp_color_select_set_channel (selector, channel);
gimp_color_selector_channel_changed (selector);
}
}
static void
gimp_color_select_update (GimpColorSelect *select,
ColorSelectUpdateType update)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
if (update & UPDATE_POS)
gimp_color_select_update_pos (select);
if (update & UPDATE_VALUES)
gimp_color_select_update_values (select);
if (update & UPDATE_XY_COLOR)
{
gimp_color_select_image_fill (select->xy_color, select->xy_color_fill,
&selector->hsv, &selector->rgb);
gtk_widget_queue_draw (select->xy_color);
}
if (update & UPDATE_Z_COLOR)
{
gimp_color_select_image_fill (select->z_color, select->z_color_fill,
&selector->hsv, &selector->rgb);
gtk_widget_queue_draw (select->z_color);
}
if (update & UPDATE_CALLER)
gimp_color_selector_color_changed (GIMP_COLOR_SELECTOR (select));
}
static void
gimp_color_select_update_values (GimpColorSelect *select)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
switch (select->z_color_fill)
{
case COLOR_SELECT_RED:
selector->rgb.b = select->pos[0] / 255.0;
selector->rgb.g = select->pos[1] / 255.0;
selector->rgb.r = select->pos[2] / 255.0;
break;
case COLOR_SELECT_GREEN:
selector->rgb.b = select->pos[0] / 255.0;
selector->rgb.r = select->pos[1] / 255.0;
selector->rgb.g = select->pos[2] / 255.0;
break;
case COLOR_SELECT_BLUE:
selector->rgb.g = select->pos[0] / 255.0;
selector->rgb.r = select->pos[1] / 255.0;
selector->rgb.b = select->pos[2] / 255.0;
break;
case COLOR_SELECT_HUE:
selector->hsv.v = select->pos[0] / 255.0;
selector->hsv.s = select->pos[1] / 255.0;
selector->hsv.h = select->pos[2] / 255.0;
break;
case COLOR_SELECT_SATURATION:
selector->hsv.v = select->pos[0] / 255.0;
selector->hsv.h = select->pos[1] / 255.0;
selector->hsv.s = select->pos[2] / 255.0;
break;
case COLOR_SELECT_VALUE:
selector->hsv.s = select->pos[0] / 255.0;
selector->hsv.h = select->pos[1] / 255.0;
selector->hsv.v = select->pos[2] / 255.0;
break;
default:
break;
}
switch (select->z_color_fill)
{
case COLOR_SELECT_RED:
case COLOR_SELECT_GREEN:
case COLOR_SELECT_BLUE:
gimp_rgb_to_hsv (&selector->rgb, &selector->hsv);
break;
case COLOR_SELECT_HUE:
case COLOR_SELECT_SATURATION:
case COLOR_SELECT_VALUE:
gimp_hsv_to_rgb (&selector->hsv, &selector->rgb);
break;
default:
break;
}
}
static void
gimp_color_select_update_pos (GimpColorSelect *select)
{
GimpColorSelector *selector = GIMP_COLOR_SELECTOR (select);
switch (select->z_color_fill)
{
case COLOR_SELECT_RED:
select->pos[0] = ROUND (selector->rgb.b * 255.0);
select->pos[1] = ROUND (selector->rgb.g * 255.0);
select->pos[2] = ROUND (selector->rgb.r * 255.0);
break;
case COLOR_SELECT_GREEN:
select->pos[0] = ROUND (selector->rgb.b * 255.0);
select->pos[1] = ROUND (selector->rgb.r * 255.0);
select->pos[2] = ROUND (selector->rgb.g * 255.0);
break;
case COLOR_SELECT_BLUE:
select->pos[0] = ROUND (selector->rgb.g * 255.0);
select->pos[1] = ROUND (selector->rgb.r * 255.0);
select->pos[2] = ROUND (selector->rgb.b * 255.0);
break;
case COLOR_SELECT_HUE:
select->pos[0] = ROUND (selector->hsv.v * 255.0);
select->pos[1] = ROUND (selector->hsv.s * 255.0);
select->pos[2] = ROUND (selector->hsv.h * 255.0);
break;
case COLOR_SELECT_SATURATION:
select->pos[0] = ROUND (selector->hsv.v * 255.0);
select->pos[1] = ROUND (selector->hsv.h * 255.0);
select->pos[2] = ROUND (selector->hsv.s * 255.0);
break;
case COLOR_SELECT_VALUE:
select->pos[0] = ROUND (selector->hsv.s * 255.0);
select->pos[1] = ROUND (selector->hsv.h * 255.0);
select->pos[2] = ROUND (selector->hsv.v * 255.0);
break;
default:
break;
}
}
#if 0
static void
gimp_color_select_drop_color (GtkWidget *widget,
gint x,
gint y,
const GimpRGB *color,
gpointer data)
{
GimpColorSelect *select = GIMP_COLOR_SELECT (data);
select->rgb = *color;
gimp_color_select_update_hsv_values (select);
gimp_color_select_update (select,
UPDATE_POS | UPDATE_XY_COLOR | UPDATE_Z_COLOR |
UPDATE_CALLER);
}
#endif
static void
gimp_color_select_xy_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select)
{
gimp_color_select_update (select, UPDATE_XY_COLOR);
}
static gboolean
gimp_color_select_xy_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpColorSelect *select)
{
GtkAllocation allocation;
cairo_t *cr;
gint x, y;
gtk_widget_get_allocation (select->xy_color, &allocation);
cr = gdk_cairo_create (gtk_widget_get_window (widget));
gdk_cairo_region (cr, event->region);
cairo_clip (cr);
x = ((allocation.width - 1) * select->pos[0]) / 255;
y = (allocation.height - 1) - ((allocation.height - 1) * select->pos[1]) / 255;
cairo_move_to (cr, 0, y + 0.5);
cairo_line_to (cr, allocation.width, y + 0.5);
cairo_move_to (cr, x + 0.5, 0);
cairo_line_to (cr, x + 0.5, allocation.height);
cairo_set_line_width (cr, 3.0);
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
cairo_stroke_preserve (cr);
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
cairo_stroke (cr);
cairo_destroy (cr);
return TRUE;
}
static gboolean
gimp_color_select_xy_events (GtkWidget *widget,
GdkEvent *event,
GimpColorSelect *select)
{
GtkAllocation allocation;
gint x, y;
switch (event->type)
{
case GDK_BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_NONE || bevent->button != 1)
return FALSE;
x = bevent->x;
y = bevent->y;
gdk_pointer_grab (gtk_widget_get_window (select->xy_color), FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
select->drag_mode = DRAG_XY;
}
break;
case GDK_BUTTON_RELEASE:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_XY || bevent->button != 1)
return FALSE;
x = bevent->x;
y = bevent->y;
gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
bevent->time);
select->drag_mode = DRAG_NONE;
}
break;
case GDK_MOTION_NOTIFY:
{
GdkEventMotion *mevent = (GdkEventMotion *) event;
if (select->drag_mode != DRAG_XY)
return FALSE;
x = mevent->x;
y = mevent->y;
}
break;
default:
return FALSE;
}
gtk_widget_get_allocation (select->xy_color, &allocation);
if (allocation.width > 1 && allocation.height > 1)
{
select->pos[0] = (x * 255) / (allocation.width - 1);
select->pos[1] = 255 - (y * 255) / (allocation.height - 1);
}
select->pos[0] = CLAMP (select->pos[0], 0, 255);
select->pos[1] = CLAMP (select->pos[1], 0, 255);
gtk_widget_queue_draw (select->xy_color);
gimp_color_select_update (select, UPDATE_VALUES | UPDATE_CALLER);
/* Ask for more motion events in case the event was a hint */
gdk_event_request_motions ((GdkEventMotion *) event);
return TRUE;
}
static void
gimp_color_select_z_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpColorSelect *select)
{
gimp_color_select_update (select, UPDATE_Z_COLOR);
}
static gboolean
gimp_color_select_z_expose (GtkWidget *widget,
GdkEventExpose *event,
GimpColorSelect *select)
{
GtkAllocation allocation;
cairo_t *cr;
gint y;
gtk_widget_get_allocation (widget, &allocation);
cr = gdk_cairo_create (gtk_widget_get_window (widget));
gdk_cairo_region (cr, event->region);
cairo_clip (cr);
y = (allocation.height - 1) - ((allocation.height - 1) * select->pos[2]) / 255;
cairo_move_to (cr, 0, y + 0.5);
cairo_line_to (cr, allocation.width, y + 0.5);
cairo_set_line_width (cr, 3.0);
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
cairo_stroke_preserve (cr);
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
cairo_stroke (cr);
cairo_destroy (cr);
return TRUE;
}
static gboolean
gimp_color_select_z_events (GtkWidget *widget,
GdkEvent *event,
GimpColorSelect *select)
{
GtkAllocation allocation;
gint z;
switch (event->type)
{
case GDK_BUTTON_PRESS:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_NONE || bevent->button != 1)
return FALSE;
z = bevent->y;
gdk_pointer_grab (gtk_widget_get_window (select->z_color), FALSE,
GDK_POINTER_MOTION_HINT_MASK |
GDK_BUTTON_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
select->drag_mode = DRAG_Z;
}
break;
case GDK_BUTTON_RELEASE:
{
GdkEventButton *bevent = (GdkEventButton *) event;
if (select->drag_mode != DRAG_Z || bevent->button != 1)
return FALSE;
z = bevent->y;
gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
bevent->time);
select->drag_mode = DRAG_NONE;
}
break;
case GDK_MOTION_NOTIFY:
{
GdkEventMotion *mevent = (GdkEventMotion *) event;
if (select->drag_mode != DRAG_Z)
return FALSE;
z = mevent->y;
}
break;
default:
return FALSE;
}
gtk_widget_get_allocation (select->z_color, &allocation);
if (allocation.height > 1)
select->pos[2] = 255 - (z * 255) / (allocation.height - 1);
select->pos[2] = CLAMP (select->pos[2], 0, 255);
gtk_widget_queue_draw (select->z_color);
gimp_color_select_update (select,
UPDATE_VALUES | UPDATE_XY_COLOR | UPDATE_CALLER);
/* Ask for more motion events in case the event was a hint */
gdk_event_request_motions ((GdkEventMotion *) event);
return TRUE;
}
static void
gimp_color_select_image_fill (GtkWidget *preview,
ColorSelectFillType fill_type,
const GimpHSV *hsv,
const GimpRGB *rgb)
{
GtkAllocation allocation;
ColorSelectFill csf;
gtk_widget_get_allocation (preview, &allocation);
csf.update = update_procs[fill_type];
csf.width = allocation.width;
csf.height = allocation.height;
csf.hsv = *hsv;
csf.rgb = *rgb;
csf.buffer = g_alloca (csf.width * 3);
for (csf.y = 0; csf.y < csf.height; csf.y++)
{
{
if (csf.update)
(* csf.update) (&csf);
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview),
0, csf.y, csf.width, 1,
GIMP_RGB_IMAGE,
csf.buffer, csf.width * 3);
}
}
}
static void
color_select_update_red (ColorSelectFill *csf)
{
guchar *p;
gint i, r;
p = csf->buffer;
r = (csf->height - csf->y + 1) * 255 / csf->height;
if (r < 0)
r = 0;
if (r > 255)
r = 255;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = 0;
*p++ = 0;
}
}
static void
color_select_update_green (ColorSelectFill *csf)
{
guchar *p;
gint i, g;
p = csf->buffer;
g = (csf->height - csf->y + 1) * 255 / csf->height;
if (g < 0)
g = 0;
if (g > 255)
g = 255;
for (i = 0; i < csf->width; i++)
{
*p++ = 0;
*p++ = g;
*p++ = 0;
}
}
static void
color_select_update_blue (ColorSelectFill *csf)
{
guchar *p;
gint i, b;
p = csf->buffer;
b = (csf->height - csf->y + 1) * 255 / csf->height;
if (b < 0)
b = 0;
if (b > 255)
b = 255;
for (i = 0; i < csf->width; i++)
{
*p++ = 0;
*p++ = 0;
*p++ = b;
}
}
static void
color_select_update_hue (ColorSelectFill *csf)
{
guchar *p;
gfloat h, f;
gint r, g, b;
gint i;
p = csf->buffer;
h = csf->y * 360.0 / csf->height;
h = CLAMP (360 - h, 0, 360);
h /= 60;
f = (h - (int) h) * 255;
r = g = b = 0;
switch ((int) h)
{
case 0:
r = 255;
g = f;
b = 0;
break;
case 1:
r = 255 - f;
g = 255;
b = 0;
break;
case 2:
r = 0;
g = 255;
b = f;
break;
case 3:
r = 0;
g = 255 - f;
b = 255;
break;
case 4:
r = f;
g = 0;
b = 255;
break;
case 5:
r = 255;
g = 0;
b = 255 - f;
break;
}
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
}
}
static void
color_select_update_saturation (ColorSelectFill *csf)
{
guchar *p;
gint s;
gint i;
p = csf->buffer;
s = csf->y * 255 / csf->height;
if (s < 0)
s = 0;
if (s > 255)
s = 255;
s = 255 - s;
for (i = 0; i < csf->width; i++)
{
*p++ = s;
*p++ = s;
*p++ = s;
}
}
static void
color_select_update_value (ColorSelectFill *csf)
{
guchar *p;
gint v;
gint i;
p = csf->buffer;
v = csf->y * 255 / csf->height;
if (v < 0)
v = 0;
if (v > 255)
v = 255;
v = 255 - v;
for (i = 0; i < csf->width; i++)
{
*p++ = v;
*p++ = v;
*p++ = v;
}
}
static void
color_select_update_red_green (ColorSelectFill *csf)
{
guchar *p;
gint i, r, b;
gfloat g, dg;
p = csf->buffer;
b = ROUND (csf->rgb.b * 255.0);
r = (csf->height - csf->y + 1) * 255 / csf->height;
if (r < 0)
r = 0;
if (r > 255)
r = 255;
g = 0;
dg = 255.0 / csf->width;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
g += dg;
}
}
static void
color_select_update_red_blue (ColorSelectFill *csf)
{
guchar *p;
gint i, r, g;
gfloat b, db;
p = csf->buffer;
g = ROUND (csf->rgb.g * 255.0);
r = (csf->height - csf->y + 1) * 255 / csf->height;
if (r < 0)
r = 0;
if (r > 255)
r = 255;
b = 0;
db = 255.0 / csf->width;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
b += db;
}
}
static void
color_select_update_green_blue (ColorSelectFill *csf)
{
guchar *p;
gint i, g, r;
gfloat b, db;
p = csf->buffer;
r = ROUND (csf->rgb.r * 255.0);
g = (csf->height - csf->y + 1) * 255 / csf->height;
if (g < 0)
g = 0;
if (g > 255)
g = 255;
b = 0;
db = 255.0 / csf->width;
for (i = 0; i < csf->width; i++)
{
*p++ = r;
*p++ = g;
*p++ = b;
b += db;
}
}
static void
color_select_update_hue_saturation (ColorSelectFill *csf)
{
guchar *p;
gfloat h, v, s, ds;
gint f;
gint i;
p = csf->buffer;
h = 360 - (csf->y * 360 / csf->height);
if (h < 0)
h = 0;
if (h > 359)
h = 359;
h /= 60;
f = (h - (int) h) * 255;
s = 0;
ds = 1.0 / csf->width;
v = csf->hsv.v;
switch ((int) h)
{
case 0:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * 255 * (1 - s);
s += ds;
}
break;
case 1:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - s * f);
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
s += ds;
}
break;
case 2:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v *255;
*p++ = v * (255 - (s * (255 - f)));
s += ds;
}
break;
case 3:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
*p++ = v * 255;
s += ds;
}
break;
case 4:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * (255 * (1 - s));
*p++ = v * 255;
s += ds;
}
break;
case 5:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
s += ds;
}
break;
}
}
static void
color_select_update_hue_value (ColorSelectFill *csf)
{
guchar *p;
gfloat h, v, dv, s;
gint f;
gint i;
p = csf->buffer;
h = 360 - (csf->y * 360 / csf->height);
if (h < 0)
h = 0;
if (h > 359)
h = 359;
h /= 60;
f = (h - (int) h) * 255;
v = 0;
dv = 1.0 / csf->width;
s = csf->hsv.s;
switch ((int) h)
{
case 0:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 1:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - s * f);
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 2:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v *255;
*p++ = v * (255 - (s * (255 - f)));
v += dv;
}
break;
case 3:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
*p++ = v * 255;
v += dv;
}
break;
case 4:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * (255 * (1 - s));
*p++ = v * 255;
v += dv;
}
break;
case 5:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
v += dv;
}
break;
}
}
static void
color_select_update_saturation_value (ColorSelectFill *csf)
{
guchar *p;
gfloat h, v, dv, s;
gint f;
gint i;
p = csf->buffer;
s = (gfloat) csf->y / csf->height;
if (s < 0)
s = 0;
if (s > 1)
s = 1;
s = 1 - s;
h = (gfloat) csf->hsv.h * 360.0;
if (h >= 360)
h -= 360;
h /= 60;
f = (h - (gint) h) * 255;
v = 0;
dv = 1.0 / csf->width;
switch ((gint) h)
{
case 0:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 1:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - s * f);
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
v += dv;
}
break;
case 2:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v *255;
*p++ = v * (255 - (s * (255 - f)));
v += dv;
}
break;
case 3:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
*p++ = v * 255;
v += dv;
}
break;
case 4:
for (i = 0; i < csf->width; i++)
{
*p++ = v * (255 - (s * (255 - f)));
*p++ = v * (255 * (1 - s));
*p++ = v * 255;
v += dv;
}
break;
case 5:
for (i = 0; i < csf->width; i++)
{
*p++ = v * 255;
*p++ = v * 255 * (1 - s);
*p++ = v * (255 - s * f);
v += dv;
}
break;
}
}
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