gimp/libgimp/gimpaspectpreview.c

487 lines
16 KiB
C

/* LIBGIMP - The GIMP Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* gimpaspectpreview.c
*
* 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
* <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "gimpuitypes.h"
#include "gimp.h"
#include "libgimp-intl.h"
#include "gimpaspectpreview.h"
/**
* SECTION: gimpaspectpreview
* @title: GimpAspectPreview
* @short_description: A widget providing a preview with fixed aspect ratio.
*
* A widget providing a preview with fixed aspect ratio.
**/
enum
{
PROP_0,
PROP_DRAWABLE,
PROP_DRAWABLE_ID
};
typedef struct
{
gint32 drawable_ID;
} GimpAspectPreviewPrivate;
typedef struct
{
gboolean update;
} PreviewSettings;
#define GIMP_ASPECT_PREVIEW_GET_PRIVATE(obj) \
G_TYPE_INSTANCE_GET_PRIVATE (preview, \
GIMP_TYPE_ASPECT_PREVIEW, \
GimpAspectPreviewPrivate)
static void gimp_aspect_preview_constructed (GObject *object);
static void gimp_aspect_preview_dispose (GObject *object);
static void gimp_aspect_preview_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_aspect_preview_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_aspect_preview_style_set (GtkWidget *widget,
GtkStyle *prev_style);
static void gimp_aspect_preview_draw (GimpPreview *preview);
static void gimp_aspect_preview_draw_buffer (GimpPreview *preview,
const guchar *buffer,
gint rowstride);
static void gimp_aspect_preview_transform (GimpPreview *preview,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y);
static void gimp_aspect_preview_untransform (GimpPreview *preview,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y);
static void gimp_aspect_preview_set_drawable (GimpAspectPreview *preview,
GimpDrawable *drawable);
static void gimp_aspect_preview_set_drawable_id
(GimpAspectPreview *preview,
gint32 drawable_ID);
G_DEFINE_TYPE (GimpAspectPreview, gimp_aspect_preview, GIMP_TYPE_PREVIEW)
#define parent_class gimp_aspect_preview_parent_class
static gint gimp_aspect_preview_counter = 0;
static void
gimp_aspect_preview_class_init (GimpAspectPreviewClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
GimpPreviewClass *preview_class = GIMP_PREVIEW_CLASS (klass);
object_class->constructed = gimp_aspect_preview_constructed;
object_class->dispose = gimp_aspect_preview_dispose;
object_class->get_property = gimp_aspect_preview_get_property;
object_class->set_property = gimp_aspect_preview_set_property;
widget_class->style_set = gimp_aspect_preview_style_set;
preview_class->draw = gimp_aspect_preview_draw;
preview_class->draw_buffer = gimp_aspect_preview_draw_buffer;
preview_class->transform = gimp_aspect_preview_transform;
preview_class->untransform = gimp_aspect_preview_untransform;
g_type_class_add_private (object_class, sizeof (GimpAspectPreviewPrivate));
/**
* GimpAspectPreview:drawable:
*
* Deprecated: use the drawable-id property instead.
*
* Since: 2.4
*/
g_object_class_install_property (object_class, PROP_DRAWABLE,
g_param_spec_pointer ("drawable",
"Drawable",
"Deprecated: use the drawable-id property instead",
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
/**
* GimpAspectPreview:drawable-id:
*
* The drawable the #GimpAspectPreview is attached to.
*
* Since: 2.10
*/
g_object_class_install_property (object_class, PROP_DRAWABLE_ID,
g_param_spec_int ("drawable-id",
"Drawable ID",
"The drawable this preview is attached to",
-1, G_MAXINT, -1,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_aspect_preview_init (GimpAspectPreview *preview)
{
g_object_set (GIMP_PREVIEW (preview)->area,
"check-size", gimp_check_size (),
"check-type", gimp_check_type (),
NULL);
}
static void
gimp_aspect_preview_constructed (GObject *object)
{
gchar *data_name;
PreviewSettings settings;
G_OBJECT_CLASS (parent_class)->constructed (object);
data_name = g_strdup_printf ("%s-aspect-preview-%d",
g_get_prgname (),
gimp_aspect_preview_counter++);
if (gimp_get_data (data_name, &settings))
{
gimp_preview_set_update (GIMP_PREVIEW (object), settings.update);
}
g_object_set_data_full (object, "gimp-aspect-preview-data-name",
data_name, (GDestroyNotify) g_free);
}
static void
gimp_aspect_preview_dispose (GObject *object)
{
const gchar *data_name = g_object_get_data (G_OBJECT (object),
"gimp-aspect-preview-data-name");
if (data_name)
{
GimpPreview *preview = GIMP_PREVIEW (object);
PreviewSettings settings;
settings.update = gimp_preview_get_update (preview);
gimp_set_data (data_name, &settings, sizeof (PreviewSettings));
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_aspect_preview_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpAspectPreview *preview = GIMP_ASPECT_PREVIEW (object);
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
switch (property_id)
{
case PROP_DRAWABLE:
g_value_set_pointer (value, preview->drawable);
break;
case PROP_DRAWABLE_ID:
g_value_set_int (value, priv->drawable_ID);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_aspect_preview_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpAspectPreview *preview = GIMP_ASPECT_PREVIEW (object);
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
switch (property_id)
{
case PROP_DRAWABLE:
g_return_if_fail (priv->drawable_ID < 1);
if (g_value_get_pointer (value))
gimp_aspect_preview_set_drawable (preview,
g_value_get_pointer (value));
break;
case PROP_DRAWABLE_ID:
gimp_aspect_preview_set_drawable_id (preview,
g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_aspect_preview_style_set (GtkWidget *widget,
GtkStyle *prev_style)
{
GimpPreview *preview = GIMP_PREVIEW (widget);
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
gint width;
gint height;
gint size;
if (GTK_WIDGET_CLASS (parent_class)->style_set)
GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
gtk_widget_style_get (widget,
"size", &size,
NULL);
width = gimp_drawable_width (priv->drawable_ID);
height = gimp_drawable_height (priv->drawable_ID);
if (width > height)
{
preview->width = MIN (width, size);
preview->height = (height * preview->width) / width;
}
else
{
preview->height = MIN (height, size);
preview->width = (width * preview->height) / height;
}
gtk_widget_set_size_request (preview->area,
preview->width, preview->height);
}
static void
gimp_aspect_preview_draw (GimpPreview *preview)
{
g_return_if_fail (GIMP_IS_ASPECT_PREVIEW (preview));
gimp_preview_area_fill (GIMP_PREVIEW_AREA (preview->area),
0, 0,
preview->width,
preview->height,
0, 0, 0);
}
static void
gimp_aspect_preview_draw_buffer (GimpPreview *preview,
const guchar *buffer,
gint rowstride)
{
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
gint32 image_ID;
image_ID = gimp_item_get_image (priv->drawable_ID);
if (gimp_selection_is_empty (image_ID))
{
gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview->area),
0, 0,
preview->width, preview->height,
gimp_drawable_type (priv->drawable_ID),
buffer,
rowstride);
}
else
{
guchar *sel;
guchar *src;
gint selection_ID;
gint width, height;
gint bpp;
selection_ID = gimp_image_get_selection (image_ID);
width = preview->width;
height = preview->height;
src = gimp_drawable_get_thumbnail_data (priv->drawable_ID,
&width, &height, &bpp);
sel = gimp_drawable_get_thumbnail_data (selection_ID,
&width, &height, &bpp);
gimp_preview_area_mask (GIMP_PREVIEW_AREA (preview->area),
0, 0, preview->width, preview->height,
gimp_drawable_type (priv->drawable_ID),
src, width * gimp_drawable_bpp (priv->drawable_ID),
buffer, rowstride,
sel, width);
g_free (sel);
g_free (src);
}
}
static void
gimp_aspect_preview_transform (GimpPreview *preview,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y)
{
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
*dest_x = (gdouble) src_x * preview->width / gimp_drawable_width (priv->drawable_ID);
*dest_y = (gdouble) src_y * preview->height / gimp_drawable_height (priv->drawable_ID);
}
static void
gimp_aspect_preview_untransform (GimpPreview *preview,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y)
{
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
*dest_x = (gdouble) src_x * gimp_drawable_width (priv->drawable_ID) / preview->width;
*dest_y = (gdouble) src_y * gimp_drawable_height (priv->drawable_ID) / preview->height;
}
static void
gimp_aspect_preview_set_drawable (GimpAspectPreview *preview,
GimpDrawable *drawable)
{
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
g_return_if_fail (preview->drawable == NULL);
g_return_if_fail (priv->drawable_ID < 1);
preview->drawable = drawable;
gimp_aspect_preview_set_drawable_id (preview, drawable->drawable_id);
}
static void
gimp_aspect_preview_set_drawable_id (GimpAspectPreview *preview,
gint32 drawable_ID)
{
GimpAspectPreviewPrivate *priv = GIMP_ASPECT_PREVIEW_GET_PRIVATE (preview);
gint d_width;
gint d_height;
gint width;
gint height;
g_return_if_fail (priv->drawable_ID < 1);
priv->drawable_ID = drawable_ID;
d_width = gimp_drawable_width (priv->drawable_ID);
d_height = gimp_drawable_height (priv->drawable_ID);
if (d_width > d_height)
{
width = MIN (d_width, 512);
height = (d_height * width) / d_width;
}
else
{
height = MIN (d_height, 512);
width = (d_width * height) / d_height;
}
gimp_preview_set_bounds (GIMP_PREVIEW (preview), 0, 0, width, height);
if (height > 0)
g_object_set (GIMP_PREVIEW (preview)->frame,
"ratio",
(gdouble) d_width / (gdouble) d_height,
NULL);
}
/**
* gimp_aspect_preview_new_from_drawable_id:
* @drawable_ID: a drawable ID
*
* Creates a new #GimpAspectPreview widget for @drawable_ID. See also
* gimp_drawable_preview_new_from_drawable_id().
*
* Since: 2.10
*
* Returns: a new #GimpAspectPreview.
**/
GtkWidget *
gimp_aspect_preview_new_from_drawable_id (gint32 drawable_ID)
{
g_return_val_if_fail (gimp_item_is_valid (drawable_ID), NULL);
g_return_val_if_fail (gimp_item_is_drawable (drawable_ID), NULL);
return g_object_new (GIMP_TYPE_ASPECT_PREVIEW,
"drawable-id", drawable_ID,
NULL);
}
/**
* gimp_aspect_preview_new:
* @drawable: a #GimpDrawable
* @toggle: unused
*
* Creates a new #GimpAspectPreview widget for @drawable. See also
* gimp_drawable_preview_new().
*
* In GIMP 2.2 the @toggle parameter was provided to conviently access
* the state of the "Preview" check-button. This is not any longer
* necessary as the preview itself now stores this state, as well as
* the scroll offset.
*
* Since: 2.2
*
* Returns: a new #GimpAspectPreview.
**/
GtkWidget *
gimp_aspect_preview_new (GimpDrawable *drawable,
gboolean *toggle)
{
g_return_val_if_fail (drawable != NULL, NULL);
return g_object_new (GIMP_TYPE_ASPECT_PREVIEW,
"drawable", drawable,
NULL);
}