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gimp/app/widgets/gimpdrawablepreview.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* gimpdrawablepreview.c
* Copyright (C) 2001 Michael Natterer <mitch@gimp.org>
*
* 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 "libgimpmath/gimpmath.h"
#include "widgets-types.h"
#include "base/temp-buf.h"
#include "core/gimpdrawable.h"
#include "core/gimpimage.h"
#include "gimpdrawablepreview.h"
static void gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass);
static void gimp_drawable_preview_init (GimpDrawablePreview *preview);
static void gimp_drawable_preview_render (GimpPreview *preview);
static void gimp_drawable_preview_get_size (GimpPreview *preview,
gint size,
gint *width,
gint *height);
static GtkWidget * gimp_drawable_preview_create_popup (GimpPreview *preview);
static GimpPreviewClass *parent_class = NULL;
GType
gimp_drawable_preview_get_type (void)
{
static GType preview_type = 0;
if (! preview_type)
{
static const GTypeInfo preview_info =
{
sizeof (GimpDrawablePreviewClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gimp_drawable_preview_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpDrawablePreview),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_drawable_preview_init,
};
preview_type = g_type_register_static (GIMP_TYPE_PREVIEW,
"GimpDrawablePreview",
&preview_info, 0);
}
return preview_type;
}
static void
gimp_drawable_preview_class_init (GimpDrawablePreviewClass *klass)
{
GimpPreviewClass *preview_class;
preview_class = GIMP_PREVIEW_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
preview_class->render = gimp_drawable_preview_render;
preview_class->get_size = gimp_drawable_preview_get_size;
preview_class->create_popup = gimp_drawable_preview_create_popup;
}
static void
gimp_drawable_preview_init (GimpDrawablePreview *preview)
{
}
static void
gimp_drawable_preview_get_size (GimpPreview *preview,
gint size,
gint *width,
gint *height)
{
GimpDrawable *drawable;
GimpImage *gimage;
gboolean scaling_up;
drawable = GIMP_DRAWABLE (preview->viewable);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
if (gimage && ! preview->is_popup)
{
gimp_preview_calc_size (preview,
gimage->width,
gimage->height,
size,
size,
gimage->xresolution,
gimage->yresolution,
width,
height,
&scaling_up);
}
else
{
gimp_preview_calc_size (preview,
drawable->width,
drawable->height,
size,
size,
1.0,
1.0,
width,
height,
&scaling_up);
}
}
static void
gimp_drawable_preview_render (GimpPreview *preview)
{
GimpDrawable *drawable;
GimpImage *gimage;
gint width;
gint height;
gint preview_width;
gint preview_height;
gboolean scaling_up;
TempBuf *render_buf;
drawable = GIMP_DRAWABLE (preview->viewable);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
width = preview->width;
height = preview->height;
if (gimage && ! preview->is_popup)
{
width = MAX (1, ROUND ((((gdouble) width / (gdouble) gimage->width) *
(gdouble) drawable->width)));
height = MAX (1, ROUND ((((gdouble) height / (gdouble) gimage->height) *
(gdouble) drawable->height)));
gimp_preview_calc_size (preview,
drawable->width,
drawable->height,
width,
height,
gimage->xresolution,
gimage->yresolution,
&preview_width,
&preview_height,
&scaling_up);
}
else
{
gimp_preview_calc_size (preview,
drawable->width,
drawable->height,
width,
height,
gimage ? gimage->xresolution : 1.0,
gimage ? gimage->yresolution : 1.0,
&preview_width,
&preview_height,
&scaling_up);
}
if (scaling_up)
{
TempBuf *temp_buf;
temp_buf = gimp_viewable_get_new_preview (preview->viewable,
drawable->width,
drawable->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 (gimage && ! preview->is_popup)
{
if (drawable->offset_x != 0)
render_buf->x =
ROUND ((((gdouble) preview->width / (gdouble) gimage->width) *
(gdouble) drawable->offset_x));
if (drawable->offset_y != 0)
render_buf->y =
ROUND ((((gdouble) preview->height / (gdouble) gimage->height) *
(gdouble) drawable->offset_y));
}
else
{
if (preview_width < width)
render_buf->x = (width - preview_width) / 2;
if (preview_height < height)
render_buf->y = (height - preview_height) / 2;
}
if (! gimage && (render_buf->x || render_buf->y))
{
TempBuf *temp_buf;
guchar white[4] = { 0, 0, 0, 0 };
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,
-1);
temp_buf_free (temp_buf);
return;
}
gimp_preview_render_and_flush (preview,
render_buf,
-1);
temp_buf_free (render_buf);
}
static GtkWidget *
gimp_drawable_preview_create_popup (GimpPreview *preview)
{
GimpDrawable *drawable;
GimpImage *gimage;
gint popup_width;
gint popup_height;
gboolean scaling_up;
drawable = GIMP_DRAWABLE (preview->viewable);
gimage = gimp_item_get_image (GIMP_ITEM (drawable));
gimp_preview_calc_size (preview,
drawable->width,
drawable->height,
MIN (preview->width * 2, GIMP_PREVIEW_MAX_POPUP_SIZE),
MIN (preview->height * 2, GIMP_PREVIEW_MAX_POPUP_SIZE),
gimage ? gimage->xresolution : 1.0,
gimage ? gimage->yresolution : 1.0,
&popup_width,
&popup_height,
&scaling_up);
if (scaling_up)
{
return gimp_preview_new_full (preview->viewable,
drawable->width,
drawable->height,
0,
TRUE, FALSE, FALSE);
}
else
{
return gimp_preview_new_full (preview->viewable,
popup_width,
popup_height,
0,
TRUE, FALSE, FALSE);
}
}
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