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gimp/libgimp/gimpaspectpreview.c

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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 2 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpwidgets/gimpwidgets.h"
#include "gimpuitypes.h"
#include "gimp.h"
#include "libgimp-intl.h"
#include "gimpaspectpreview.h"
enum
{
PROP_0,
PROP_DRAWABLE
};
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);
G_DEFINE_TYPE (GimpAspectPreview, gimp_aspect_preview, GIMP_TYPE_PREVIEW)
#define parent_class gimp_aspect_preview_parent_class
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->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;
/**
* GimpAspectPreview:drawable:
*
* Since: GIMP 2.4
*/
g_object_class_install_property (object_class, PROP_DRAWABLE,
g_param_spec_pointer ("drawable", NULL, NULL,
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_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_pointer (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_get_pointer (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);
GimpDrawable *drawable = GIMP_ASPECT_PREVIEW (preview)->drawable;
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);
if (drawable->width > drawable->height)
{
preview->width = MIN (drawable->width, size);
preview->height = (drawable->height * preview->width) / drawable->width;
}
else
{
preview->height = MIN (drawable->height, size);
preview->width = (drawable->width * preview->height) / drawable->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)
{
GimpDrawable *drawable = GIMP_ASPECT_PREVIEW (preview)->drawable;
gint32 image_id;
image_id = gimp_drawable_get_image (drawable->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 (drawable->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 (drawable->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 (drawable->drawable_id),
src, width * drawable->bpp,
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)
{
GimpDrawable *drawable = GIMP_ASPECT_PREVIEW (preview)->drawable;
*dest_x = (gdouble) src_x * preview->width / drawable->width;
*dest_y = (gdouble) src_y * preview->height / drawable->height;
}
static void
gimp_aspect_preview_untransform (GimpPreview *preview,
gint src_x,
gint src_y,
gint *dest_x,
gint *dest_y)
{
GimpDrawable *drawable = GIMP_ASPECT_PREVIEW (preview)->drawable;
*dest_x = (gdouble) src_x * drawable->width / preview->width;
*dest_y = (gdouble) src_y * drawable->height / preview->height;
}
static void
gimp_aspect_preview_set_drawable (GimpAspectPreview *preview,
GimpDrawable *drawable)
{
gint width;
gint height;
preview->drawable = drawable;
if (drawable->width > drawable->height)
{
width = MIN (drawable->width, 512);
height = (drawable->height * width) / drawable->width;
}
else
{
height = MIN (drawable->height, 512);
width = (drawable->width * height) / drawable->height;
}
gimp_preview_set_bounds (GIMP_PREVIEW (preview), 0, 0, width, height);
if (height > 0)
g_object_set (GIMP_PREVIEW (preview)->frame,
"ratio",
(gdouble) drawable->width / (gdouble) drawable->height,
NULL);
}
static void
gimp_aspect_preview_notify_update (GimpPreview *preview,
GParamSpec *pspec,
gboolean *toggle)
{
*toggle = gimp_preview_get_update (preview);
}
/**
* gimp_aspect_preview_new:
* @drawable: a #GimpDrawable
* @toggle: pointer to a #gboolean variable to sync with the "Preview"
* check-button or %NULL
*
* Creates a new #GimpAspectPreview widget for @drawable. See also
* gimp_drawable_preview_new().
*
* Since: GIMP 2.2
**/
GtkWidget *
gimp_aspect_preview_new (GimpDrawable *drawable,
gboolean *toggle)
{
GtkWidget *preview;
g_return_val_if_fail (drawable != NULL, NULL);
preview = g_object_new (GIMP_TYPE_ASPECT_PREVIEW,
"drawable", drawable,
NULL);
if (toggle)
{
gimp_preview_set_update (GIMP_PREVIEW (preview), *toggle);
g_signal_connect (preview, "notify::update",
G_CALLBACK (gimp_aspect_preview_notify_update),
toggle);
}
return preview;
}
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