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8769bbb456
2000-02-26 Garry R. Osgood <gosgood@idt.net> * app/commands.c * app/gimpimage.c * app/layer.c * app/layer.h * app/resize.c * app/resize.h Aliasing artifacts that changed relative positions of layers under scaling, giving rise to #5271, are minimized by a new layer.c function, layer_scale_by_factors(). Closes #5271. See http://idt.net/~gosgood/gimp-patch/patch07.html for further detail. See also usage documentation for layer_scale() and layer_scale_by_factors() in layer.c. Provided logic for the Scale Image dialog box to pre-check an image's layers for the possibility that a particular scaling, s: 0 < s < 1, reduces a layer dimension to zero. Should this case prevail, a boolean dialog box warns the user of the possibility. The user may (1) Cancel, returning focus to Scale Image and the possibility of corrective adjustment, or (2) OK the scaling. The layers that will vanish upon the new scaling are culled from the GimpImage::layers list first.
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* The GIMP -- an 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __RESIZE_H__
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#define __RESIZE_H__
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#include "libgimp/gimpunit.h"
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#include "gimage.h"
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typedef enum
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{
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ScaleWidget,
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ResizeWidget
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} ResizeType;
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typedef enum
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{
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ResizeImage,
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ResizeLayer
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} ResizeTarget;
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typedef struct _Resize Resize;
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struct _Resize
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{
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/* The calling procedure is respondible for showing this widget */
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GtkWidget *resize_shell;
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ResizeType type;
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ResizeTarget target;
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gint width;
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gint height;
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gdouble resolution_x;
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gdouble resolution_y;
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GimpUnit unit;
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gdouble ratio_x;
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gdouble ratio_y;
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gint offset_x;
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gint offset_y;
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/* Don't touch this :) */
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void * private_part;
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};
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typedef struct
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{
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Resize *resize;
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GimpImage *gimage;
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} ImageResize;
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/* If resolution_x is zero, then don't show resolution modification
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* parts of the dialog. If object is non-NULL, then attach the cancel
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* callback to its destroy signal. */
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Resize * resize_widget_new (ResizeType type,
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ResizeTarget target,
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GtkObject * object,
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gint width,
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gint height,
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gdouble resolution_x,
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gdouble resolution_y,
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GimpUnit unit,
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gboolean dot_for_dot,
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GtkSignalFunc ok_cb,
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GtkSignalFunc cancel_cb,
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gpointer user_data);
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void resize_widget_free (Resize * resize);
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/* Layer scaling sanity check and warning dialogs */
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gboolean resize_check_layer_scaling (ImageResize *);
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void resize_scale_implement (ImageResize *);
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#endif /* __RESIZE_H__ */
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