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8d0af04c3a
2002-02-19 Michael Natterer <mitch@gimp.org> Fixed #10466 (disappearing pixels when rotating by 90 deg): * app/core/gimpdrawable-transform.c: when transforming backwards to find the destination line's sub-pixel source coordinates, we need to transform the pixels _center_, not it's upper left corner. * app/core/gimpdrawable-transform-utils.[ch]: added gimp_drawable_transform_matrix_rotate_center() which takes double center coordinates instead of an integer pixel bounding box. * app/tools/gimptransformtool.[ch]: use double instead of int for all coordinates except the original bounding box. * app/tools/gimprotatetool.c: use double whenever touching the "center" value, so it can be sub-pixel positioned.
65 lines
3.7 KiB
C
65 lines
3.7 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
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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 __GIMP_DRAWABLE_TRANSFORM_UTILS_H__
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#define __GIMP_DRAWABLE_TRANSFORM_UTILS_H__
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void gimp_drawable_transform_matrix_rotate (gint x1,
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gint y1,
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gint x2,
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gint y2,
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gdouble angle,
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GimpMatrix3 result);
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void gimp_drawable_transform_matrix_rotate_center (gdouble cx,
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gdouble cy,
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gdouble angle,
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GimpMatrix3 result);
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void gimp_drawable_transform_matrix_scale (gint x1,
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gint y1,
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gint x2,
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gint y2,
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gdouble tx1,
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gdouble ty1,
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gdouble tx2,
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gdouble ty2,
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GimpMatrix3 result);
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void gimp_drawable_transform_matrix_shear (gint x1,
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gint y1,
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gint x2,
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gint y2,
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InternalOrientationType orientation,
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gdouble amount,
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GimpMatrix3 result);
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void gimp_drawable_transform_matrix_perspective (gint x1,
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gint y1,
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gint x2,
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gint y2,
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gdouble tx1,
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gdouble ty1,
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gdouble tx2,
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gdouble ty2,
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gdouble tx3,
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gdouble ty3,
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gdouble tx4,
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gdouble ty5,
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GimpMatrix3 result);
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#endif /* __GIMP_DRAWABLE_TRANSFORM_SHEAR_H__ */
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