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Bug 55367 - Rotated view of the canvas (view is rotated, not image contents)

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First version of display rotation, inspired by gimp-painter.
The rotation always happens around the image's center.

The only "UI" for rotating is currently shift+middle-drag and
shift+space-drag. Control constrains the angle to 15 degrees
and is currently the only way to go back to "no rotation".
This commit is contained in:
Michael Natterer
2013-04-19 16:22:19 +02:00
parent f45e7c26be
commit b3a9a6a3e3
15 changed files with 568 additions and 36 deletions
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51
app/display/gimpdisplayshell-rotate.h Normal file
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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/>.
*/
#ifndef __GIMP_DISPLAY_SHELL_ROTATE_H__
#define __GIMP_DISPLAY_SHELL_ROTATE_H__
void gimp_display_shell_rotate_update_transform (GimpDisplayShell *shell);
void gimp_display_shell_rotate_transform_bounds (GimpDisplayShell *shell,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gdouble *nx1,
gdouble *ny1,
gdouble *nx2,
gdouble *ny2);
void gimp_display_shell_rotate_untransform_bounds (GimpDisplayShell *shell,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gdouble *nx1,
gdouble *ny1,
gdouble *nx2,
gdouble *ny2);
void gimp_display_shell_rotate_drag (GimpDisplayShell *shell,
gdouble last_x,
gdouble last_y,
gdouble cur_x,
gdouble cur_y,
gboolean constrain);
#endif /* __GIMP_DISPLAY_SHELL_ROTATE_H__ */