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PIKApp/app/widgets/pikafgbgeditor.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikafgbgeditor.c
* Copyright (C) 2004 Michael Natterer <mitch@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 <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "libpikaconfig/pikaconfig.h"
#include "libpikawidgets/pikawidgets.h"
#include "widgets-types.h"
#include "config/pikacoreconfig.h"
#include "core/pika.h"
#include "core/pikacontext.h"
#include "core/pikaimage.h"
#include "core/pikaimage-colormap.h"
#include "core/pikamarshal.h"
#include "core/pikapalette.h"
#include "pikadnd.h"
#include "pikafgbgeditor.h"
#include "pikawidgets-utils.h"
#define CHANNEL_EPSILON 1e-3
enum
{
PROP_0,
PROP_CONTEXT,
PROP_ACTIVE_COLOR
};
enum
{
COLOR_CLICKED,
COLOR_DROPPED,
COLORS_SWAPPED,
COLORS_DEFAULT,
TOOLTIP,
LAST_SIGNAL
};
static void pika_fg_bg_editor_dispose (GObject *object);
static void pika_fg_bg_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_fg_bg_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static GtkSizeRequestMode
pika_fg_bg_editor_get_request_mode (GtkWidget *widget);
static void
pika_fg_bg_editor_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
static void pika_fg_bg_editor_size_allocate (GtkWidget *editor,
GtkAllocation *allocation);
static void pika_fg_bg_editor_style_updated (GtkWidget *widget);
static gboolean pika_fg_bg_editor_draw (GtkWidget *widget,
cairo_t *cr);
static gboolean pika_fg_bg_editor_button_press (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean pika_fg_bg_editor_button_release (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean pika_fg_bg_editor_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time);
static gboolean pika_fg_bg_editor_query_tooltip (GtkWidget *widget,
gint x,
gint y,
gboolean keyboard_mode,
GtkTooltip *tooltip);
static void pika_fg_bg_editor_drag_color (GtkWidget *widget,
PikaRGB *color,
gpointer data);
static void pika_fg_bg_editor_drop_color (GtkWidget *widget,
gint x,
gint y,
const PikaRGB *color,
gpointer data);
static void pika_fg_bg_editor_create_transform (PikaFgBgEditor *editor);
static void pika_fg_bg_editor_destroy_transform (PikaFgBgEditor *editor);
static void pika_fg_bg_editor_image_changed (PikaFgBgEditor *editor,
PikaImage *image);
static void pika_fg_bg_editor_draw_color_frame (PikaFgBgEditor *editor,
cairo_t *cr,
const PikaRGB *color,
gint x,
gint y,
gint width,
gint height,
gint corner_dx,
gint corner_dy);
G_DEFINE_TYPE (PikaFgBgEditor, pika_fg_bg_editor, GTK_TYPE_EVENT_BOX)
#define parent_class pika_fg_bg_editor_parent_class
static guint editor_signals[LAST_SIGNAL] = { 0 };
static void
pika_fg_bg_editor_class_init (PikaFgBgEditorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
editor_signals[COLOR_CLICKED] =
g_signal_new ("color-clicked",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaFgBgEditorClass, color_clicked),
NULL, NULL, NULL,
G_TYPE_NONE, 1,
PIKA_TYPE_ACTIVE_COLOR);
editor_signals[COLOR_DROPPED] =
g_signal_new ("color-dropped",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaFgBgEditorClass, color_dropped),
NULL, NULL, NULL,
G_TYPE_NONE, 1,
PIKA_TYPE_ACTIVE_COLOR);
editor_signals[COLORS_SWAPPED] =
g_signal_new ("colors-swapped",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaFgBgEditorClass, colors_swapped),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
editor_signals[COLORS_DEFAULT] =
g_signal_new ("colors-default",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaFgBgEditorClass, colors_default),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
editor_signals[TOOLTIP] =
g_signal_new ("tooltip",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaFgBgEditorClass, tooltip),
NULL, NULL,
pika_marshal_VOID__INT_OBJECT,
G_TYPE_NONE, 2,
G_TYPE_INT,
GTK_TYPE_TOOLTIP);
object_class->dispose = pika_fg_bg_editor_dispose;
object_class->set_property = pika_fg_bg_editor_set_property;
object_class->get_property = pika_fg_bg_editor_get_property;
widget_class->get_request_mode = pika_fg_bg_editor_get_request_mode;
widget_class->get_preferred_width_for_height = pika_fg_bg_editor_get_preferred_width_for_height;
widget_class->size_allocate = pika_fg_bg_editor_size_allocate;
widget_class->style_updated = pika_fg_bg_editor_style_updated;
widget_class->draw = pika_fg_bg_editor_draw;
widget_class->button_press_event = pika_fg_bg_editor_button_press;
widget_class->button_release_event = pika_fg_bg_editor_button_release;
widget_class->drag_motion = pika_fg_bg_editor_drag_motion;
widget_class->query_tooltip = pika_fg_bg_editor_query_tooltip;
g_object_class_install_property (object_class, PROP_CONTEXT,
g_param_spec_object ("context",
NULL, NULL,
PIKA_TYPE_CONTEXT,
PIKA_PARAM_READWRITE));
g_object_class_install_property (object_class, PROP_ACTIVE_COLOR,
g_param_spec_enum ("active-color",
NULL, NULL,
PIKA_TYPE_ACTIVE_COLOR,
PIKA_ACTIVE_COLOR_FOREGROUND,
PIKA_PARAM_READWRITE));
gtk_widget_class_set_css_name (widget_class, "PikaFgBgEditor");
}
static void
pika_fg_bg_editor_init (PikaFgBgEditor *editor)
{
editor->active_color = PIKA_ACTIVE_COLOR_FOREGROUND;
gtk_widget_set_can_focus (GTK_WIDGET (editor), FALSE);
gtk_event_box_set_visible_window (GTK_EVENT_BOX (editor), FALSE);
gtk_widget_add_events (GTK_WIDGET (editor),
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK);
pika_dnd_color_source_add (GTK_WIDGET (editor),
pika_fg_bg_editor_drag_color, NULL);
pika_dnd_color_dest_add (GTK_WIDGET (editor),
pika_fg_bg_editor_drop_color, NULL);
pika_widget_track_monitor (GTK_WIDGET (editor),
G_CALLBACK (pika_fg_bg_editor_destroy_transform),
NULL, NULL);
gtk_widget_set_size_request (GTK_WIDGET (editor), 24, 24);
}
static void
pika_fg_bg_editor_dispose (GObject *object)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (object);
if (editor->context)
pika_fg_bg_editor_set_context (editor, NULL);
g_clear_object (&editor->default_icon);
g_clear_object (&editor->swap_icon);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
pika_fg_bg_editor_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (object);
switch (property_id)
{
case PROP_CONTEXT:
pika_fg_bg_editor_set_context (editor, g_value_get_object (value));
break;
case PROP_ACTIVE_COLOR:
pika_fg_bg_editor_set_active (editor, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_fg_bg_editor_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (object);
switch (property_id)
{
case PROP_CONTEXT:
g_value_set_object (value, editor->context);
break;
case PROP_ACTIVE_COLOR:
g_value_set_enum (value, editor->active_color);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static GtkSizeRequestMode
pika_fg_bg_editor_get_request_mode (GtkWidget *widget)
{
return GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT;
}
static void
pika_fg_bg_editor_get_preferred_width_for_height (GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
*minimum_width = height;
*natural_width = height;
}
static void
pika_fg_bg_editor_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
pika_fg_bg_editor_style_updated (widget);
}
static void
pika_fg_bg_editor_style_updated (GtkWidget *widget)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
GTK_WIDGET_CLASS (parent_class)->style_updated (widget);
g_clear_object (&editor->default_icon);
g_clear_object (&editor->swap_icon);
}
static gboolean
pika_fg_bg_editor_draw (GtkWidget *widget,
cairo_t *cr)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
GtkStyleContext *style = gtk_widget_get_style_context (widget);
GtkBorder border;
GtkBorder padding;
GdkRectangle rect;
gint scale_factor;
gint width, height;
gint default_w, default_h;
gint swap_w, swap_h;
PikaRGB color;
gtk_style_context_save (style);
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
gtk_style_context_get_border (style, gtk_style_context_get_state (style),
&border);
gtk_style_context_get_padding (style, gtk_style_context_get_state (style),
&padding);
border.left += padding.left;
border.right += padding.right;
border.top += padding.top;
border.bottom += padding.bottom;
scale_factor = gtk_widget_get_scale_factor (widget);
/* draw the default colors pixbuf */
if (! editor->default_icon)
editor->default_icon = pika_widget_load_icon (widget,
PIKA_ICON_COLORS_DEFAULT,
MAX (MIN (width * 0.3, 12), 6));
default_w = gdk_pixbuf_get_width (editor->default_icon) / scale_factor;
default_h = gdk_pixbuf_get_height (editor->default_icon) / scale_factor;
if (default_w < width / 2 && default_h < height / 2)
{
cairo_surface_t *surface;
surface = gdk_cairo_surface_create_from_pixbuf (editor->default_icon,
scale_factor, NULL);
cairo_set_source_surface (cr, surface,
border.left,
height - border.bottom - default_h);
cairo_surface_destroy (surface);
cairo_paint (cr);
}
else
{
default_w = default_h = 0;
}
/* draw the swap colors pixbuf */
if (! editor->swap_icon)
editor->swap_icon = pika_widget_load_icon (widget,
PIKA_ICON_COLORS_SWAP,
MAX (MIN (width * 0.3, 12), 6));
swap_w = gdk_pixbuf_get_width (editor->swap_icon) / scale_factor;
swap_h = gdk_pixbuf_get_height (editor->swap_icon) / scale_factor;
if (swap_w < width / 2 && swap_h < height / 2)
{
cairo_surface_t *surface;
surface = gdk_cairo_surface_create_from_pixbuf (editor->swap_icon,
scale_factor, NULL);
cairo_set_source_surface (cr, surface,
width - border.right - swap_w,
border.top);
cairo_surface_destroy (surface);
cairo_paint (cr);
}
else
{
swap_w = swap_h = 0;
}
rect.width = width - MAX (default_w, swap_w) - 4 - border.top - border.bottom;
rect.height = height - MAX (default_h, swap_h) - 2 - border.left - border.right;
if (rect.height > (height * 3 / 4))
rect.width = MAX (rect.width - (rect.height - ((height * 3 / 4))),
width * 2 / 3);
editor->rect_width = rect.width;
editor->rect_height = rect.height;
if (! editor->transform)
pika_fg_bg_editor_create_transform (editor);
if (editor->context)
{
/* draw the background frame */
pika_context_get_background (editor->context, &color);
rect.x = width - rect.width - border.right;
rect.y = height - rect.height - border.bottom;
pika_fg_bg_editor_draw_color_frame (editor, cr, &color,
rect.x, rect.y,
rect.width, rect.height,
-1, -1);
/* draw the foreground frame */
pika_context_get_foreground (editor->context, &color);
rect.x = border.left;
rect.y = border.top;
pika_fg_bg_editor_draw_color_frame (editor, cr, &color,
rect.x, rect.y,
rect.width, rect.height,
+1, +1);
}
gtk_style_context_restore (style);
return TRUE;
}
static PikaFgBgTarget
pika_fg_bg_editor_target (PikaFgBgEditor *editor,
gint x,
gint y)
{
GtkWidget *widget = GTK_WIDGET (editor);
GtkStyleContext *style = gtk_widget_get_style_context (widget);
GtkBorder border;
GtkBorder padding;
gint width;
gint height;
gint rect_w = editor->rect_width;
gint rect_h = editor->rect_height;
gint button_width;
gint button_height;
width = gtk_widget_get_allocated_width (widget);
height = gtk_widget_get_allocated_height (widget);
gtk_style_context_get_border (style, gtk_style_context_get_state (style),
&border);
gtk_style_context_get_padding (style, gtk_style_context_get_state (style),
&padding);
border.left += padding.left;
border.right += padding.right;
border.top += padding.top;
border.bottom += padding.bottom;
button_width = width - border.left - border.right - rect_w;
button_height = height - border.top - border.bottom - rect_h;
if (x > border.left &&
x < border.left + rect_w &&
y > border.top &&
y < border.top + rect_h)
{
return PIKA_FG_BG_TARGET_FOREGROUND;
}
else if (x > width - border.right - rect_w &&
x < width - border.right &&
y > height - border.bottom - rect_h &&
y < height - border.bottom)
{
return PIKA_FG_BG_TARGET_BACKGROUND;
}
else if (x > border.left &&
x < border.left + button_width &&
y > border.top + rect_h &&
y < height - border.bottom)
{
return PIKA_FG_BG_TARGET_DEFAULT;
}
else if (x > border.left + rect_w &&
x < width - border.right &&
y > border.top &&
y < border.top + button_height)
{
return PIKA_FG_BG_TARGET_SWAP;
}
return PIKA_FG_BG_TARGET_INVALID;
}
static gboolean
pika_fg_bg_editor_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
if (bevent->button == 1 && bevent->type == GDK_BUTTON_PRESS)
{
PikaFgBgTarget target = pika_fg_bg_editor_target (editor,
bevent->x, bevent->y);
editor->click_target = PIKA_FG_BG_TARGET_INVALID;
switch (target)
{
case PIKA_FG_BG_TARGET_FOREGROUND:
if (editor->active_color != PIKA_ACTIVE_COLOR_FOREGROUND)
pika_fg_bg_editor_set_active (editor,
PIKA_ACTIVE_COLOR_FOREGROUND);
editor->click_target = PIKA_FG_BG_TARGET_FOREGROUND;
break;
case PIKA_FG_BG_TARGET_BACKGROUND:
if (editor->active_color != PIKA_ACTIVE_COLOR_BACKGROUND)
pika_fg_bg_editor_set_active (editor,
PIKA_ACTIVE_COLOR_BACKGROUND);
editor->click_target = PIKA_FG_BG_TARGET_BACKGROUND;
break;
case PIKA_FG_BG_TARGET_SWAP:
if (editor->context)
{
pika_context_swap_colors (editor->context);
g_signal_emit (editor, editor_signals[COLORS_SWAPPED], 0);
}
break;
case PIKA_FG_BG_TARGET_DEFAULT:
if (editor->context)
{
pika_context_set_default_colors (editor->context);
g_signal_emit (editor, editor_signals[COLORS_DEFAULT], 0);
}
break;
default:
break;
}
}
return GDK_EVENT_STOP;
}
static gboolean
pika_fg_bg_editor_button_release (GtkWidget *widget,
GdkEventButton *bevent)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
if (bevent->button == 1)
{
PikaFgBgTarget target = pika_fg_bg_editor_target (editor,
bevent->x, bevent->y);
if (target == editor->click_target)
{
switch (target)
{
case PIKA_FG_BG_TARGET_FOREGROUND:
g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
PIKA_ACTIVE_COLOR_FOREGROUND);
break;
case PIKA_FG_BG_TARGET_BACKGROUND:
g_signal_emit (editor, editor_signals[COLOR_CLICKED], 0,
PIKA_ACTIVE_COLOR_BACKGROUND);
break;
default:
break;
}
}
editor->click_target = PIKA_FG_BG_TARGET_INVALID;
}
return GDK_EVENT_STOP;
}
static gboolean
pika_fg_bg_editor_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
PikaFgBgTarget target = pika_fg_bg_editor_target (editor, x, y);
if (target == PIKA_FG_BG_TARGET_FOREGROUND ||
target == PIKA_FG_BG_TARGET_BACKGROUND)
{
gdk_drag_status (context, GDK_ACTION_COPY, time);
return TRUE;
}
gdk_drag_status (context, 0, time);
return FALSE;
}
static gboolean
pika_fg_bg_editor_query_tooltip (GtkWidget *widget,
gint x,
gint y,
gboolean keyboard_mode,
GtkTooltip *tooltip)
{
if (! keyboard_mode)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
PikaFgBgTarget target = pika_fg_bg_editor_target (editor, x, y);
if (target != PIKA_FG_BG_TARGET_INVALID)
{
g_signal_emit (widget, editor_signals[TOOLTIP], 0,
target, tooltip);
return TRUE;
}
}
return FALSE;
}
/* public functions */
GtkWidget *
pika_fg_bg_editor_new (PikaContext *context)
{
g_return_val_if_fail (context == NULL || PIKA_IS_CONTEXT (context), NULL);
return g_object_new (PIKA_TYPE_FG_BG_EDITOR,
"context", context,
NULL);
}
void
pika_fg_bg_editor_set_context (PikaFgBgEditor *editor,
PikaContext *context)
{
g_return_if_fail (PIKA_IS_FG_BG_EDITOR (editor));
g_return_if_fail (context == NULL || PIKA_IS_CONTEXT (context));
if (context != editor->context)
{
if (editor->context)
{
g_signal_handlers_disconnect_by_func (editor->context,
gtk_widget_queue_draw,
editor);
g_signal_handlers_disconnect_by_func (editor->context,
G_CALLBACK (pika_fg_bg_editor_image_changed),
editor);
g_object_unref (editor->context);
g_signal_handlers_disconnect_by_func (editor->color_config,
pika_fg_bg_editor_destroy_transform,
editor);
g_clear_object (&editor->color_config);
}
editor->context = context;
if (context)
{
g_object_ref (context);
g_signal_connect_swapped (context, "foreground-changed",
G_CALLBACK (gtk_widget_queue_draw),
editor);
g_signal_connect_swapped (context, "background-changed",
G_CALLBACK (gtk_widget_queue_draw),
editor);
g_signal_connect_swapped (context, "image-changed",
G_CALLBACK (pika_fg_bg_editor_image_changed),
editor);
editor->color_config = g_object_ref (context->pika->config->color_management);
g_signal_connect_swapped (editor->color_config, "notify",
G_CALLBACK (pika_fg_bg_editor_destroy_transform),
editor);
}
pika_fg_bg_editor_destroy_transform (editor);
g_object_notify (G_OBJECT (editor), "context");
}
}
void
pika_fg_bg_editor_set_active (PikaFgBgEditor *editor,
PikaActiveColor active)
{
g_return_if_fail (PIKA_IS_FG_BG_EDITOR (editor));
editor->active_color = active;
gtk_widget_queue_draw (GTK_WIDGET (editor));
g_object_notify (G_OBJECT (editor), "active-color");
}
/* private functions */
static void
pika_fg_bg_editor_drag_color (GtkWidget *widget,
PikaRGB *color,
gpointer data)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
if (editor->context)
{
switch (editor->active_color)
{
case PIKA_ACTIVE_COLOR_FOREGROUND:
pika_context_get_foreground (editor->context, color);
break;
case PIKA_ACTIVE_COLOR_BACKGROUND:
pika_context_get_background (editor->context, color);
break;
}
}
}
static void
pika_fg_bg_editor_drop_color (GtkWidget *widget,
gint x,
gint y,
const PikaRGB *color,
gpointer data)
{
PikaFgBgEditor *editor = PIKA_FG_BG_EDITOR (widget);
if (editor->context)
{
switch (pika_fg_bg_editor_target (editor, x, y))
{
case PIKA_FG_BG_TARGET_FOREGROUND:
pika_context_set_foreground (editor->context, color);
g_signal_emit (editor, editor_signals[COLOR_DROPPED], 0,
PIKA_ACTIVE_COLOR_FOREGROUND);
break;
case PIKA_FG_BG_TARGET_BACKGROUND:
pika_context_set_background (editor->context, color);
g_signal_emit (editor, editor_signals[COLOR_DROPPED], 0,
PIKA_ACTIVE_COLOR_BACKGROUND);
break;
default:
break;
}
}
}
static void
pika_fg_bg_editor_create_transform (PikaFgBgEditor *editor)
{
if (editor->color_config)
{
static PikaColorProfile *profile = NULL;
if (G_UNLIKELY (! profile))
profile = pika_color_profile_new_rgb_srgb ();
editor->transform =
pika_widget_get_color_transform (GTK_WIDGET (editor),
editor->color_config,
profile,
babl_format ("R'G'B'A double"),
babl_format ("R'G'B'A double"),
NULL,
PIKA_COLOR_RENDERING_INTENT_RELATIVE_COLORIMETRIC,
FALSE);
}
}
static void
pika_fg_bg_editor_destroy_transform (PikaFgBgEditor *editor)
{
g_clear_object (&editor->transform);
gtk_widget_queue_draw (GTK_WIDGET (editor));
}
static void
pika_fg_bg_editor_image_changed (PikaFgBgEditor *editor,
PikaImage *image)
{
gtk_widget_queue_draw (GTK_WIDGET (editor));
if (editor->active_image)
{
g_signal_handlers_disconnect_by_func (editor->active_image,
G_CALLBACK (gtk_widget_queue_draw),
editor);
if (pika_image_get_base_type (editor->active_image) == PIKA_INDEXED)
{
PikaPalette *palette;
palette = pika_image_get_colormap_palette (editor->active_image);
g_signal_handlers_disconnect_by_func (palette,
G_CALLBACK (gtk_widget_queue_draw),
editor);
}
}
editor->active_image = image;
if (image)
{
g_signal_connect_swapped (image, "notify::base-type",
G_CALLBACK (gtk_widget_queue_draw),
editor);
g_signal_connect_swapped (image, "colormap-changed",
G_CALLBACK (gtk_widget_queue_draw),
editor);
if (pika_image_get_base_type (image) == PIKA_INDEXED)
{
PikaPalette *palette;
palette = pika_image_get_colormap_palette (editor->active_image);
g_signal_connect_swapped (palette, "dirty",
G_CALLBACK (gtk_widget_queue_draw),
editor);
}
}
}
static void
pika_fg_bg_editor_draw_color_frame (PikaFgBgEditor *editor,
cairo_t *cr,
const PikaRGB *color,
gint x,
gint y,
gint width,
gint height,
gint corner_dx,
gint corner_dy)
{
PikaPalette *colormap_palette = NULL;
PikaImageBaseType base_type = PIKA_RGB;
PikaRGB transformed_color;
if (editor->active_image)
{
base_type = pika_image_get_base_type (editor->active_image);
if (base_type == PIKA_INDEXED)
{
colormap_palette = pika_image_get_colormap_palette (
editor->active_image);
}
}
if (editor->transform)
{
pika_color_transform_process_pixels (editor->transform,
babl_format ("R'G'B'A double"),
color,
babl_format ("R'G'B'A double"),
&transformed_color,
1);
}
else
{
transformed_color = *color;
}
cairo_save (cr);
pika_cairo_set_source_rgb (cr, &transformed_color);
cairo_rectangle (cr, x, y, width, height);
cairo_fill (cr);
if (editor->color_config &&
/* Common out-of-gamut case */
((color->r < 0.0 || color->r > 1.0 ||
color->g < 0.0 || color->g > 1.0 ||
color->b < 0.0 || color->b > 1.0) ||
/* Indexed images */
(colormap_palette &&
! pika_palette_find_entry (colormap_palette, color, NULL)) ||
/* Grayscale images */
(base_type == PIKA_GRAY &&
(ABS (color->r - color->g) > CHANNEL_EPSILON ||
ABS (color->r - color->b) > CHANNEL_EPSILON ||
ABS (color->g - color->b) > CHANNEL_EPSILON))))
{
gint corner_x = x + 0.5 * (1.0 - corner_dx) * width;
gint corner_y = y + 0.5 * (1.0 - corner_dy) * height;
gint side = MIN (width, height) * 2 / 3;
PikaRGB out_of_gamut_color;
cairo_move_to (cr, corner_x, corner_y);
cairo_line_to (cr, corner_x + side * corner_dx, corner_y);
cairo_line_to (cr, corner_x, corner_y + side * corner_dy);
cairo_close_path (cr);
pika_color_config_get_out_of_gamut_color (editor->color_config,
&out_of_gamut_color);
pika_cairo_set_source_rgb (cr, &out_of_gamut_color);
cairo_fill (cr);
}
cairo_set_line_width (cr, 1.0);
cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
cairo_rectangle (cr, x + 0.5, y + 0.5, width - 1.0, height - 1.0);
cairo_stroke (cr);
cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
cairo_rectangle (cr, x + 1.5, y + 1.5, width - 3.0, height - 3.0);
cairo_stroke (cr);
cairo_restore (cr);
}