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https://github.com/gryf/wmaker.git
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35a43c9430
With a set of images i was able to detect that the flip functions was shifting the image by 1px. The 90 and 270 degrees rotation were not working as the functions were also mirroring the img. The patch is also fixing the C style based on checkpatch.
138 lines
2.8 KiB
C
138 lines
2.8 KiB
C
/* flip.c - image flip
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*
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* Raster graphics library
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*
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* Copyright (c) 2014 Window Maker Team
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <X11/Xlib.h>
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#include "wraster.h"
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RImage *RVerticalFlipImage(RImage *image)
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{
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RImage *img;
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int nwidth, nheight;
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int x, y;
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int bpp = image->format == RRGBAFormat ? 4 : 3;
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nwidth = image->width;
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nheight = image->height;
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img = RCreateImage(nwidth, nheight, True);
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if (!img)
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return NULL;
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if (bpp == 3) {
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unsigned char *optr, *nptr;
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optr = image->data;
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nptr = img->data + 4 * (nwidth * nheight - nwidth);
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for (y = 0; y < nheight; y++) {
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for (x = 0; x < nwidth; x++) {
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nptr[0] = optr[0];
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nptr[1] = optr[1];
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nptr[2] = optr[2];
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nptr[3] = 255;
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optr += 3;
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nptr += 4;
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}
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nptr -= nwidth*8;
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}
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} else {
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unsigned char *optr, *nptr;
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optr = image->data;
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nptr = img->data + 4 * (nwidth * nheight - nwidth);
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for (y = 0; y < nheight; y++) {
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for (x = 0; x < nwidth; x++) {
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nptr[0] = optr[0];
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nptr[1] = optr[1];
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nptr[2] = optr[2];
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nptr[3] = optr[3];
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optr += 4;
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nptr += 4;
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}
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nptr -= nwidth * 8;
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}
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}
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return img;
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}
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RImage *RHorizontalFlipImage(RImage *image)
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{
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RImage *img;
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int nwidth, nheight;
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int x, y;
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int bpp = image->format == RRGBAFormat ? 4 : 3;
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nwidth = image->width;
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nheight = image->height;
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img = RCreateImage(nwidth, nheight, True);
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if (!img)
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return NULL;
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if (bpp == 3) {
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unsigned char *optr, *nptr;
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optr = image->data;
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nptr = img->data + 4 * (nwidth - 1);
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for (y = nheight; y; y--) {
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for (x = 0; x < nwidth; x++) {
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nptr[0] = optr[0];
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nptr[1] = optr[1];
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nptr[2] = optr[2];
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nptr[3] = 255;
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optr += 3;
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nptr -= 4;
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}
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nptr += 8 * nwidth;
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}
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} else {
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unsigned char *optr, *nptr;
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optr = image->data;
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nptr = img->data + 4 * (nwidth - 1);
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for (y = nheight; y; y--) {
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for (x = 0; x < nwidth; x++) {
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nptr[0] = optr[0];
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nptr[1] = optr[1];
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nptr[2] = optr[2];
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nptr[3] = optr[3];
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optr += 4;
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nptr -= 4;
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}
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nptr += 8 * nwidth;
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}
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}
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return img;
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}
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