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PIKApp/libpikawidgets/pikacolordisplaystack.c

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/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* pikacolordisplaystack.c
* Copyright (C) 2003 Michael Natterer <mitch@gimp.org>
*
* 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
* Lesser 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
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikacolor/pikacolor.h"
#include "pikawidgetstypes.h"
#include "pikacolordisplay.h"
#include "pikacolordisplaystack.h"
#include "pikawidgetsmarshal.h"
/**
* SECTION: pikacolordisplaystack
* @title: PikaColorDisplayStack
* @short_description: A stack of color correction modules.
* @see_also: #PikaColorDisplay
*
* A stack of color correction modules.
**/
enum
{
CHANGED,
ADDED,
REMOVED,
REORDERED,
LAST_SIGNAL
};
struct _PikaColorDisplayStackPrivate
{
GList *filters;
};
#define GET_PRIVATE(obj) (((PikaColorDisplayStack *) (obj))->priv)
static void pika_color_display_stack_dispose (GObject *object);
static void pika_color_display_stack_display_changed (PikaColorDisplay *display,
PikaColorDisplayStack *stack);
static void pika_color_display_stack_display_enabled (PikaColorDisplay *display,
GParamSpec *pspec,
PikaColorDisplayStack *stack);
static void pika_color_display_stack_disconnect (PikaColorDisplayStack *stack,
PikaColorDisplay *display);
G_DEFINE_TYPE_WITH_PRIVATE (PikaColorDisplayStack, pika_color_display_stack,
G_TYPE_OBJECT)
#define parent_class pika_color_display_stack_parent_class
static guint stack_signals[LAST_SIGNAL] = { 0 };
static void
pika_color_display_stack_class_init (PikaColorDisplayStackClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
stack_signals[CHANGED] =
g_signal_new ("changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaColorDisplayStackClass, changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
stack_signals[ADDED] =
g_signal_new ("added",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaColorDisplayStackClass, added),
NULL, NULL,
_pika_widgets_marshal_VOID__OBJECT_INT,
G_TYPE_NONE, 2,
PIKA_TYPE_COLOR_DISPLAY,
G_TYPE_INT);
stack_signals[REMOVED] =
g_signal_new ("removed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaColorDisplayStackClass, removed),
NULL, NULL, NULL,
G_TYPE_NONE, 1,
PIKA_TYPE_COLOR_DISPLAY);
stack_signals[REORDERED] =
g_signal_new ("reordered",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaColorDisplayStackClass, reordered),
NULL, NULL,
_pika_widgets_marshal_VOID__OBJECT_INT,
G_TYPE_NONE, 2,
PIKA_TYPE_COLOR_DISPLAY,
G_TYPE_INT);
object_class->dispose = pika_color_display_stack_dispose;
klass->changed = NULL;
klass->added = NULL;
klass->removed = NULL;
klass->reordered = NULL;
}
static void
pika_color_display_stack_init (PikaColorDisplayStack *stack)
{
stack->priv = pika_color_display_stack_get_instance_private (stack);
}
static void
pika_color_display_stack_dispose (GObject *object)
{
PikaColorDisplayStack *stack = PIKA_COLOR_DISPLAY_STACK (object);
PikaColorDisplayStackPrivate *private = GET_PRIVATE (object);
if (private->filters)
{
GList *list;
for (list = private->filters; list; list = g_list_next (list))
{
PikaColorDisplay *display = list->data;
pika_color_display_stack_disconnect (stack, display);
g_object_unref (display);
}
g_list_free (private->filters);
private->filters = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
/* public functions */
/**
* pika_color_display_stack_new:
*
* Creates a new stack of color correction modules.
*
* Returns: (transfer full): a newly allocated #PikaColorDisplayStack.
*
* Since: 2.0
**/
PikaColorDisplayStack *
pika_color_display_stack_new (void)
{
return g_object_new (PIKA_TYPE_COLOR_DISPLAY_STACK, NULL);
}
/**
* pika_color_display_stack_clone:
* @stack: a #PikaColorDisplayStack
*
* Creates a copy of @stack with all its display color modules also
* duplicated.
*
* Returns: (transfer full): a duplicate of @stack.
*
* Since: 2.0
**/
PikaColorDisplayStack *
pika_color_display_stack_clone (PikaColorDisplayStack *stack)
{
PikaColorDisplayStackPrivate *private;
PikaColorDisplayStack *clone;
GList *list;
g_return_val_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack), NULL);
private = GET_PRIVATE (stack);
clone = g_object_new (PIKA_TYPE_COLOR_DISPLAY_STACK, NULL);
for (list = private->filters; list; list = g_list_next (list))
{
PikaColorDisplay *display;
display = pika_color_display_clone (list->data);
pika_color_display_stack_add (clone, display);
g_object_unref (display);
}
return clone;
}
/**
* pika_color_display_stack_changed:
* @stack: a #PikaColorDisplayStack
*
* Emit the "changed" signal of @stack.
*
* Since: 2.0
**/
void
pika_color_display_stack_changed (PikaColorDisplayStack *stack)
{
g_return_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack));
g_signal_emit (stack, stack_signals[CHANGED], 0);
}
/**
* pika_color_display_stack_get_filters:
* @stack: a #PikaColorDisplayStack
*
* Gets the list of added color modules.
*
* Returns: (transfer none) (element-type PikaColorDisplay):
the list of @stack's display color modules.
*
* Since: 3.0
**/
GList *
pika_color_display_stack_get_filters (PikaColorDisplayStack *stack)
{
g_return_val_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack), NULL);
return GET_PRIVATE (stack)->filters;
}
/**
* pika_color_display_stack_add:
* @stack: a #PikaColorDisplayStack
* @display: (transfer none): a #PikaColorDisplay
*
* Add the color module @display to @stack.
*
* Since: 2.0
**/
void
pika_color_display_stack_add (PikaColorDisplayStack *stack,
PikaColorDisplay *display)
{
PikaColorDisplayStackPrivate *private;
g_return_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack));
g_return_if_fail (PIKA_IS_COLOR_DISPLAY (display));
private = GET_PRIVATE (stack);
g_return_if_fail (g_list_find (private->filters, display) == NULL);
private->filters = g_list_append (private->filters, g_object_ref (display));
g_signal_connect (display, "changed",
G_CALLBACK (pika_color_display_stack_display_changed),
G_OBJECT (stack));
g_signal_connect (display, "notify::enabled",
G_CALLBACK (pika_color_display_stack_display_enabled),
G_OBJECT (stack));
g_signal_emit (stack, stack_signals[ADDED], 0,
display, g_list_length (private->filters) - 1);
pika_color_display_stack_changed (stack);
}
/**
* pika_color_display_stack_remove:
* @stack: a #PikaColorDisplayStack
* @display: (transfer none): a #PikaColorDisplay
*
* Remove the color module @display from @stack.
*
* Since: 2.0
**/
void
pika_color_display_stack_remove (PikaColorDisplayStack *stack,
PikaColorDisplay *display)
{
PikaColorDisplayStackPrivate *private;
g_return_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack));
g_return_if_fail (PIKA_IS_COLOR_DISPLAY (display));
private = GET_PRIVATE (stack);
g_return_if_fail (g_list_find (private->filters, display) != NULL);
pika_color_display_stack_disconnect (stack, display);
private->filters = g_list_remove (private->filters, display);
g_signal_emit (stack, stack_signals[REMOVED], 0, display);
pika_color_display_stack_changed (stack);
g_object_unref (display);
}
/**
* pika_color_display_stack_reorder_up:
* @stack: a #PikaColorDisplayStack
* @display: a #PikaColorDisplay
*
* Move the color module @display up in the filter list of @stack.
*
* Since: 2.0
**/
void
pika_color_display_stack_reorder_up (PikaColorDisplayStack *stack,
PikaColorDisplay *display)
{
PikaColorDisplayStackPrivate *private;
GList *list;
g_return_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack));
g_return_if_fail (PIKA_IS_COLOR_DISPLAY (display));
private = GET_PRIVATE (stack);
list = g_list_find (private->filters, display);
g_return_if_fail (list != NULL);
if (list->prev)
{
list->data = list->prev->data;
list->prev->data = display;
g_signal_emit (stack, stack_signals[REORDERED], 0,
display, g_list_position (private->filters, list->prev));
pika_color_display_stack_changed (stack);
}
}
/**
* pika_color_display_stack_reorder_down:
* @stack: a #PikaColorDisplayStack
* @display: a #PikaColorDisplay
*
* Move the color module @display down in the filter list of @stack.
*
* Since: 2.0
**/
void
pika_color_display_stack_reorder_down (PikaColorDisplayStack *stack,
PikaColorDisplay *display)
{
PikaColorDisplayStackPrivate *private;
GList *list;
g_return_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack));
g_return_if_fail (PIKA_IS_COLOR_DISPLAY (display));
private = GET_PRIVATE (stack);
list = g_list_find (private->filters, display);
g_return_if_fail (list != NULL);
if (list->next)
{
list->data = list->next->data;
list->next->data = display;
g_signal_emit (stack, stack_signals[REORDERED], 0,
display, g_list_position (private->filters, list->next));
pika_color_display_stack_changed (stack);
}
}
/**
* pika_color_display_stack_convert_buffer:
* @stack: a #PikaColorDisplayStack
* @buffer: a #GeglBuffer
* @area: area of @buffer to convert
*
* Runs all the stack's filters on all pixels in @area of @buffer.
*
* Since: 2.10
**/
void
pika_color_display_stack_convert_buffer (PikaColorDisplayStack *stack,
GeglBuffer *buffer,
GeglRectangle *area)
{
PikaColorDisplayStackPrivate *private;
GList *list;
g_return_if_fail (PIKA_IS_COLOR_DISPLAY_STACK (stack));
g_return_if_fail (GEGL_IS_BUFFER (buffer));
private = GET_PRIVATE (stack);
for (list = private->filters; list; list = g_list_next (list))
{
PikaColorDisplay *display = list->data;
pika_color_display_convert_buffer (display, buffer, area);
}
}
/* private functions */
static void
pika_color_display_stack_display_changed (PikaColorDisplay *display,
PikaColorDisplayStack *stack)
{
if (pika_color_display_get_enabled (display))
pika_color_display_stack_changed (stack);
}
static void
pika_color_display_stack_display_enabled (PikaColorDisplay *display,
GParamSpec *pspec,
PikaColorDisplayStack *stack)
{
pika_color_display_stack_changed (stack);
}
static void
pika_color_display_stack_disconnect (PikaColorDisplayStack *stack,
PikaColorDisplay *display)
{
g_signal_handlers_disconnect_by_func (display,
pika_color_display_stack_display_changed,
stack);
g_signal_handlers_disconnect_by_func (display,
pika_color_display_stack_display_enabled,
stack);
}
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