gimp/app/widgets/gimpimagepreview.c

240 lines
5.6 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GimpImagePreview Widget
* Copyright (C) 2001 Michael Natterer
*
* 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 2 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, 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 "widgets-types.h"
#include "base/temp-buf.h"
#include "core/gimpimage.h"
#include "gimpimagepreview.h"
static void gimp_image_preview_class_init (GimpImagePreviewClass *klass);
static void gimp_image_preview_init (GimpImagePreview *preview);
static void gimp_image_preview_render (GimpPreview *preview);
static void gimp_image_preview_get_size (GimpPreview *preview,
gint size,
gint *width,
gint *height);
static GtkWidget * gimp_image_preview_create_popup (GimpPreview *preview);
static GimpPreviewClass *parent_class = NULL;
GtkType
gimp_image_preview_get_type (void)
{
static GtkType preview_type = 0;
if (! preview_type)
{
GtkTypeInfo preview_info =
{
"GimpImagePreview",
sizeof (GimpImagePreview),
sizeof (GimpImagePreviewClass),
(GtkClassInitFunc) gimp_image_preview_class_init,
(GtkObjectInitFunc) gimp_image_preview_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
preview_type = gtk_type_unique (GIMP_TYPE_PREVIEW, &preview_info);
}
return preview_type;
}
static void
gimp_image_preview_class_init (GimpImagePreviewClass *klass)
{
GtkObjectClass *object_class;
GimpPreviewClass *preview_class;
object_class = (GtkObjectClass *) klass;
preview_class = (GimpPreviewClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_PREVIEW);
preview_class->render = gimp_image_preview_render;
preview_class->get_size = gimp_image_preview_get_size;
preview_class->create_popup = gimp_image_preview_create_popup;
}
static void
gimp_image_preview_init (GimpImagePreview *preview)
{
preview->channel = -1;
}
static void
gimp_image_preview_get_size (GimpPreview *preview,
gint size,
gint *width,
gint *height)
{
GimpImage *gimage;
gboolean scaling_up;
gimage = GIMP_IMAGE (preview->viewable);
gimp_preview_calc_size (preview,
gimage->width,
gimage->height,
size,
size,
gimage->xresolution,
gimage->yresolution,
width,
height,
&scaling_up);
}
static void
gimp_image_preview_render (GimpPreview *preview)
{
GimpImage *gimage;
gint width;
gint height;
gint preview_width;
gint preview_height;
gboolean scaling_up;
TempBuf *render_buf;
gimage = GIMP_IMAGE (preview->viewable);
width = preview->width;
height = preview->height;
gimp_preview_calc_size (preview,
gimage->width,
gimage->height,
width,
height,
gimage->xresolution,
gimage->yresolution,
&preview_width,
&preview_height,
&scaling_up);
if (scaling_up)
{
TempBuf *temp_buf;
temp_buf = gimp_viewable_get_new_preview (preview->viewable,
gimage->width,
gimage->height);
render_buf = temp_buf_scale (temp_buf, preview_width, preview_height);
temp_buf_free (temp_buf);
}
else
{
render_buf = gimp_viewable_get_new_preview (preview->viewable,
preview_width,
preview_height);
}
if (preview_width < width) render_buf->x = (width - preview_width) / 2;
if (preview_height < height) render_buf->y = (height - preview_height) / 2;
if (render_buf->x || render_buf->y)
{
TempBuf *temp_buf;
guchar white[4] = { 255, 255, 255, 255 };
temp_buf = temp_buf_new (width, height,
render_buf->bytes,
0, 0,
white);
temp_buf_copy_area (render_buf, temp_buf,
0, 0,
render_buf->width,
render_buf->height,
render_buf->x,
render_buf->y);
temp_buf_free (render_buf);
gimp_preview_render_and_flush (preview,
temp_buf,
GIMP_IMAGE_PREVIEW (preview)->channel);
temp_buf_free (temp_buf);
return;
}
gimp_preview_render_and_flush (preview,
render_buf,
GIMP_IMAGE_PREVIEW (preview)->channel);
temp_buf_free (render_buf);
}
static GtkWidget *
gimp_image_preview_create_popup (GimpPreview *preview)
{
GimpImage *gimage;
gint popup_width;
gint popup_height;
gboolean scaling_up;
gimage = GIMP_IMAGE (preview->viewable);
gimp_preview_calc_size (preview,
gimage->width,
gimage->height,
MIN (preview->width * 2, 256),
MIN (preview->height * 2, 256),
gimage->xresolution,
gimage->yresolution,
&popup_width,
&popup_height,
&scaling_up);
if (scaling_up)
{
return gimp_preview_new_full (preview->viewable,
gimage->width,
gimage->height,
0,
TRUE, FALSE, FALSE);
}
else
{
return gimp_preview_new_full (preview->viewable,
popup_width,
popup_height,
0,
TRUE, FALSE, FALSE);
}
}