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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include "core-types.h"
#include "base/temp-buf.h"
#include "base/tile-manager-preview.h"
#include "gimpimage.h"
#include "gimpimage-preview.h"
#include "gimpimage-private.h"
#include "gimpprojection.h"
void
gimp_image_get_preview_size (GimpViewable *viewable,
gint size,
gboolean is_popup,
gboolean dot_for_dot,
gint *width,
gint *height)
{
GimpImage *image = GIMP_IMAGE (viewable);
gdouble xres;
gdouble yres;
gimp_image_get_resolution (image, &xres, &yres);
gimp_viewable_calc_preview_size (gimp_image_get_width (image),
gimp_image_get_height (image),
size,
size,
dot_for_dot,
xres,
yres,
width,
height,
NULL);
}
gboolean
gimp_image_get_popup_size (GimpViewable *viewable,
gint width,
gint height,
gboolean dot_for_dot,
gint *popup_width,
gint *popup_height)
{
GimpImage *image = GIMP_IMAGE (viewable);
if (gimp_image_get_width (image) > width ||
gimp_image_get_height (image) > height)
{
gboolean scaling_up;
gimp_viewable_calc_preview_size (gimp_image_get_width (image),
gimp_image_get_height (image),
width * 2,
height * 2,
dot_for_dot, 1.0, 1.0,
popup_width,
popup_height,
&scaling_up);
if (scaling_up)
{
*popup_width = gimp_image_get_width (image);
*popup_height = gimp_image_get_height (image);
}
return TRUE;
}
return FALSE;
}
TempBuf *
gimp_image_get_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpImagePrivate *private = GIMP_IMAGE_GET_PRIVATE (viewable);
if (private->preview &&
private->preview->width == width &&
private->preview->height == height)
{
/* The easy way */
return private->preview;
}
else
{
/* The hard way */
if (private->preview)
temp_buf_free (private->preview);
private->preview = gimp_image_get_new_preview (viewable, context,
width, height);
return private->preview;
}
}
TempBuf *
gimp_image_get_new_preview (GimpViewable *viewable,
GimpContext *context,
gint width,
gint height)
{
GimpImage *image = GIMP_IMAGE (viewable);
GimpProjection *projection = gimp_image_get_projection (image);
TempBuf *buf;
TileManager *tiles;
gdouble scale_x;
gdouble scale_y;
gint level;
gboolean is_premult;
scale_x = (gdouble) width / (gdouble) gimp_image_get_width (image);
scale_y = (gdouble) height / (gdouble) gimp_image_get_height (image);
level = gimp_projection_get_level (projection, scale_x, scale_y);
tiles = gimp_projection_get_tiles_at_level (projection, level, &is_premult);
buf = tile_manager_get_preview (tiles, width, height);
/* FIXME: We could avoid this if the view renderer and all other
* preview code would know how to deal with pre-multiply alpha.
*/
if (is_premult)
temp_buf_demultiply (buf);
return buf;
}
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