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https://github.com/aseprite/aseprite.git
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86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
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/* ase -- allegro-sprite-editor: the ultimate sprites factory
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* Copyright (C) 2001-2005 David A. Capello
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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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#include "config.h"
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#ifndef USE_PRECOMPILED_HEADER
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#include "modules/editors.h"
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#include "modules/sprites.h"
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#include "raster/image.h"
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#include "raster/mask.h"
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#include "raster/sprite.h"
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#include "raster/undo.h"
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#include "util/misc.h"
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#endif
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static void do_flip (int horz);
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void flip_horizontal (void) { do_flip (TRUE); }
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void flip_vertical (void) { do_flip (FALSE); }
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static void do_flip (int horz)
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{
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Sprite *sprite = current_sprite;
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Image *image, *area;
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int x1, y1, x2, y2;
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int x, y;
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if (!sprite)
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return;
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image = GetImage2 (sprite, &x, &y, NULL);
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if (!image)
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return;
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if (mask_is_empty (sprite->mask)) {
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x1 = 0;
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y1 = 0;
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x2 = image->w-1;
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y2 = image->h-1;
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}
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else {
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/* apply the frame offset */
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x1 = sprite->mask->x - x;
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y1 = sprite->mask->y - y;
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x2 = sprite->mask->x + sprite->mask->w - 1 - x;
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y2 = sprite->mask->y + sprite->mask->h - 1 - y;
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/* clip */
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x1 = MID (0, x1, image->w-1);
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y1 = MID (0, y1, image->h-1);
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x2 = MID (0, x2, image->w-1);
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y2 = MID (0, y2, image->h-1);
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}
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/* insert the undo operation */
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if (undo_is_enabled (sprite->undo))
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undo_flip (sprite->undo, image, x1, y1, x2, y2, horz);
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/* flip the portion of the bitmap */
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area = image_crop (image, x1, y1, x2-x1+1, y2-y1+1);
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for (y=0; y<(y2-y1+1); y++)
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for (x=0; x<(x2-x1+1); x++)
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image_putpixel (image,
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horz ? x2-x: x1+x,
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!horz? y2-y: y1+y,
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image_getpixel (area, x, y));
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image_free (area);
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}
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