mirror of https://github.com/GNOME/gimp.git
154 lines
4.7 KiB
C
154 lines
4.7 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include "core-types.h"
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#include "base/temp-buf.h"
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#include "base/tile-manager-preview.h"
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#include "gimpimage.h"
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#include "gimpimage-preview.h"
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#include "gimpprojection.h"
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void
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gimp_image_get_preview_size (GimpViewable *viewable,
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gint size,
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gboolean is_popup,
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gboolean dot_for_dot,
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gint *width,
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gint *height)
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{
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GimpImage *image = GIMP_IMAGE (viewable);
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gdouble xres;
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gdouble yres;
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gimp_image_get_resolution (image, &xres, &yres);
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gimp_viewable_calc_preview_size (gimp_image_get_width (image),
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gimp_image_get_height (image),
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size,
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size,
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dot_for_dot,
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xres,
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yres,
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width,
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height,
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NULL);
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}
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gboolean
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gimp_image_get_popup_size (GimpViewable *viewable,
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gint width,
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gint height,
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gboolean dot_for_dot,
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gint *popup_width,
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gint *popup_height)
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{
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GimpImage *image = GIMP_IMAGE (viewable);
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if (gimp_image_get_width (image) > width ||
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gimp_image_get_height (image) > height)
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{
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gboolean scaling_up;
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gimp_viewable_calc_preview_size (gimp_image_get_width (image),
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gimp_image_get_height (image),
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width * 2,
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height * 2,
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dot_for_dot, 1.0, 1.0,
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popup_width,
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popup_height,
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&scaling_up);
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if (scaling_up)
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{
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*popup_width = gimp_image_get_width (image);
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*popup_height = gimp_image_get_height (image);
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}
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return TRUE;
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}
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return FALSE;
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}
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TempBuf *
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gimp_image_get_preview (GimpViewable *viewable,
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GimpContext *context,
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gint width,
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gint height)
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{
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GimpImage *image = GIMP_IMAGE (viewable);
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if (image->preview &&
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image->preview->width == width &&
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image->preview->height == height)
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{
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/* The easy way */
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return image->preview;
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}
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else
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{
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/* The hard way */
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if (image->preview)
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temp_buf_free (image->preview);
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image->preview = gimp_image_get_new_preview (viewable, context,
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width, height);
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return image->preview;
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}
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}
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TempBuf *
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gimp_image_get_new_preview (GimpViewable *viewable,
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GimpContext *context,
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gint width,
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gint height)
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{
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GimpImage *image = GIMP_IMAGE (viewable);
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TempBuf *buf;
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TileManager *tiles;
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gdouble scale_x;
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gdouble scale_y;
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gint level;
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gboolean is_premult;
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scale_x = (gdouble) width / (gdouble) gimp_image_get_width (image);
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scale_y = (gdouble) height / (gdouble) gimp_image_get_height (image);
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level = gimp_projection_get_level (image->projection, scale_x, scale_y);
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tiles = gimp_projection_get_tiles_at_level (image->projection, level,
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&is_premult);
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buf = tile_manager_get_preview (tiles, width, height);
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/* FIXME: We could avoid this if the view renderer and all other
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* preview code would know how to deal with pre-multiply alpha.
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*/
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if (is_premult)
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temp_buf_demultiply (buf);
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return buf;
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}
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