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|
/* 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
* <https://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 "gimppdb-private.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
};
struct _GimpAspectPreview
{
GimpPreview parent_instance;
GimpDrawable *drawable;
};
typedef struct
{
gboolean update;
} PreviewSettings;
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_updated (GtkWidget *widget);
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);
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_updated = gimp_aspect_preview_style_updated;
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;
/**
* GimpAspectPreview:drawable-id:
*
* The drawable the #GimpAspectPreview is attached to.
*
* Since: 2.10
*/
g_object_class_install_property (object_class, PROP_DRAWABLE,
g_param_spec_object ("drawable",
"Drawable",
"The drawable this preview is attached to",
GIMP_TYPE_DRAWABLE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_aspect_preview_init (GimpAspectPreview *preview)
{
g_object_set (gimp_preview_get_area (GIMP_PREVIEW (preview)),
"check-size", gimp_check_size (),
"check-type", gimp_check_type (),
"check-custom-color1", gimp_check_custom_color1 (),
"check-custom-color2", gimp_check_custom_color2 (),
NULL);
}
static void
gimp_aspect_preview_constructed (GObject *object)
{
gchar *data_name;
PreviewSettings settings;
GBytes *settings_bytes = NULL;
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_pdb_get_data (data_name, &settings_bytes) &&
g_bytes_get_size (settings_bytes) == sizeof (PreviewSettings))
{
settings = *((PreviewSettings *) g_bytes_get_data (settings_bytes, NULL));
gimp_preview_set_update (GIMP_PREVIEW (object), settings.update);
}
g_bytes_unref (settings_bytes);
g_object_set_data_full (object, "gimp-aspect-preview-data-name",
data_name, (GDestroyNotify) g_free);
}
static void
gimp_aspect_preview_dispose (GObject *object)
{
GimpAspectPreview *preview = GIMP_ASPECT_PREVIEW (object);
const gchar *data_name;
data_name = g_object_get_data (G_OBJECT (object),
"gimp-aspect-preview-data-name");
if (data_name)
{
GimpPreview *preview = GIMP_PREVIEW (object);
GBytes *bytes;
PreviewSettings settings;
settings.update = gimp_preview_get_update (preview);
bytes = g_bytes_new_static (&settings, sizeof (PreviewSettings));
gimp_pdb_set_data (data_name, bytes);
g_bytes_unref (bytes);
}
g_clear_object (&preview->drawable);
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);
switch (property_id)
{
case PROP_DRAWABLE:
g_value_set_object (value, preview->drawable);
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);
switch (property_id)
{
case PROP_DRAWABLE:
gimp_aspect_preview_set_drawable (preview, g_value_dup_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_aspect_preview_style_updated (GtkWidget *widget)
{
GimpPreview *preview = GIMP_PREVIEW (widget);
GimpAspectPreview *aspect_preview = GIMP_ASPECT_PREVIEW (preview);
GtkWidget *area = gimp_preview_get_area (preview);
GTK_WIDGET_CLASS (parent_class)->style_updated (widget);
if (area)
{
gint width;
gint height;
gint preview_width;
gint preview_height;
gint size;
width = gimp_drawable_get_width (aspect_preview->drawable);
height = gimp_drawable_get_height (aspect_preview->drawable);
gtk_widget_style_get (widget,
"size", &size,
NULL);
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;
}
gimp_preview_set_size (preview, preview_width, preview_height);
}
}
static void
gimp_aspect_preview_draw (GimpPreview *preview)
{
GtkWidget *area = gimp_preview_get_area (preview);
gint width;
gint height;
gimp_preview_get_size (preview, &width, &height);
gimp_preview_area_fill (GIMP_PREVIEW_AREA (area),
0, 0,
width, height,
0, 0, 0);
}
static void
gimp_aspect_preview_draw_buffer (GimpPreview *preview,
const guchar *buffer,
gint rowstride)
{
GimpAspectPreview *aspect_preview = GIMP_ASPECT_PREVIEW (preview);
GtkWidget *area = gimp_preview_get_area (preview);
GimpImage *image;
gint width;
gint height;
gimp_preview_get_size (preview, &width, &height);
image = gimp_item_get_image (GIMP_ITEM (aspect_preview->drawable));
if (gimp_selection_is_empty (image))
{
gimp_preview_area_draw (GIMP_PREVIEW_AREA (area),
0, 0,
width, height,
gimp_drawable_type (aspect_preview->drawable),
buffer,
rowstride);
}
else
{
GBytes *sel;
GBytes *src;
GimpSelection *selection;
gint w, h;
gint bpp;
selection = gimp_image_get_selection (image);
src = gimp_drawable_get_thumbnail_data (aspect_preview->drawable,
width, height,
&w, &h, &bpp);
sel = gimp_drawable_get_thumbnail_data (GIMP_DRAWABLE (selection),
width, height,
&w, &h, &bpp);
gimp_preview_area_mask (GIMP_PREVIEW_AREA (area),
0, 0, width, height,
gimp_drawable_type (aspect_preview->drawable),
g_bytes_get_data (src, NULL),
width * gimp_drawable_get_bpp (aspect_preview->drawable),
buffer, rowstride,
g_bytes_get_data (sel, NULL), width);
g_bytes_unref (sel);
g_bytes_unref (src);
}
}
static void
gimp_aspect_preview_transform (GimpPreview *preview,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y)
{
GimpAspectPreview *aspect_preview = GIMP_ASPECT_PREVIEW (preview);
gint width;
gint height;
gimp_preview_get_size (preview, &width, &height);
*dest_x = (gdouble) src_x * width / gimp_drawable_get_width (aspect_preview->drawable);
*dest_y = (gdouble) src_y * height / gimp_drawable_get_height (aspect_preview->drawable);
}
static void
gimp_aspect_preview_untransform (GimpPreview *preview,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y)
{
GimpAspectPreview *aspect_preview = GIMP_ASPECT_PREVIEW (preview);
gint width;
gint height;
gimp_preview_get_size (preview, &width, &height);
*dest_x = (gdouble) src_x * gimp_drawable_get_width (aspect_preview->drawable) / width;
*dest_y = (gdouble) src_y * gimp_drawable_get_height (aspect_preview->drawable) / height;
}
static void
gimp_aspect_preview_set_drawable (GimpAspectPreview *preview,
GimpDrawable *drawable)
{
gint d_width;
gint d_height;
gint width;
gint height;
g_return_if_fail (preview->drawable == NULL);
preview->drawable = drawable;
d_width = gimp_drawable_get_width (preview->drawable);
d_height = gimp_drawable_get_height (preview->drawable);
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_get_frame (GIMP_PREVIEW (preview)),
"ratio",
(gdouble) d_width / (gdouble) d_height,
NULL);
}
/**
* gimp_aspect_preview_new_from_drawable:
* @drawable: (transfer none): a drawable
*
* Creates a new #GimpAspectPreview widget for @drawable_. See also
* gimp_drawable_preview_new_from_drawable().
*
* Since: 2.10
*
* Returns: a new #GimpAspectPreview.
**/
GtkWidget *
gimp_aspect_preview_new_from_drawable (GimpDrawable *drawable)
{
g_return_val_if_fail (GIMP_IS_DRAWABLE (drawable), NULL);
g_return_val_if_fail (gimp_item_is_valid (GIMP_ITEM (drawable)), NULL);
return g_object_new (GIMP_TYPE_ASPECT_PREVIEW,
"drawable", drawable,
NULL);
}
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