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-rw-r--r--app/core/gimpitem-preview.c133
1 files changed, 133 insertions, 0 deletions
diff --git a/app/core/gimpitem-preview.c b/app/core/gimpitem-preview.c
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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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <gegl.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "core-types.h"
+
+#include "config/gimpcoreconfig.h"
+
+#include "gimp.h"
+#include "gimpimage.h"
+#include "gimpitem.h"
+#include "gimpitem-preview.h"
+
+
+/* public functions */
+
+void
+gimp_item_get_preview_size (GimpViewable *viewable,
+ gint size,
+ gboolean is_popup,
+ gboolean dot_for_dot,
+ gint *width,
+ gint *height)
+{
+ GimpItem *item = GIMP_ITEM (viewable);
+ GimpImage *image = gimp_item_get_image (item);
+
+ if (image && ! image->gimp->config->layer_previews && ! is_popup)
+ {
+ *width = size;
+ *height = size;
+ return;
+ }
+
+ if (image && ! is_popup)
+ {
+ 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);
+ }
+ else
+ {
+ gimp_viewable_calc_preview_size (gimp_item_get_width (item),
+ gimp_item_get_height (item),
+ size,
+ size,
+ dot_for_dot, 1.0, 1.0,
+ width,
+ height,
+ NULL);
+ }
+}
+
+gboolean
+gimp_item_get_popup_size (GimpViewable *viewable,
+ gint width,
+ gint height,
+ gboolean dot_for_dot,
+ gint *popup_width,
+ gint *popup_height)
+{
+ GimpItem *item = GIMP_ITEM (viewable);
+ GimpImage *image = gimp_item_get_image (item);
+
+ if (image && ! image->gimp->config->layer_previews)
+ return FALSE;
+
+ if (gimp_item_get_width (item) > width ||
+ gimp_item_get_height (item) > height)
+ {
+ gboolean scaling_up;
+ gdouble xres = 1.0;
+ gdouble yres = 1.0;
+
+ if (image)
+ gimp_image_get_resolution (image, &xres, &yres);
+
+ gimp_viewable_calc_preview_size (gimp_item_get_width (item),
+ gimp_item_get_height (item),
+ width * 2,
+ height * 2,
+ dot_for_dot,
+ xres,
+ yres,
+ popup_width,
+ popup_height,
+ &scaling_up);
+
+ if (scaling_up)
+ {
+ *popup_width = gimp_item_get_width (item);
+ *popup_height = gimp_item_get_height (item);
+ }
+
+ return TRUE;
+ }
+
+ return FALSE;
+}