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fix: image placement when rotating (#493)

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When rotating a partially shown image (i.e. image size * zoom >
window size) the image is panned to top or left (if `win->w` or
`win->h` is greatest, respectively). Seems to be due to
unsignedness of `win->[wh]`, when taking the difference between
them in `img_rotate` either `img->[xy]` ends up being close to
`UINT_MAX` and the image is panned to top or left edge.

Reviewed-on: https://codeberg.org/nsxiv/nsxiv/pulls/493
Reviewed-by: NRK <nrk@disroot.org>
Co-authored-by: e5150 <e5150@noreply.codeberg.org>
Co-committed-by: e5150 <e5150@noreply.codeberg.org>
This commit is contained in:
e5150 2024-04-23 06:47:09 +00:00 committed by NRK
parent 437e060021
commit a581cd6344
1 changed files with 2 additions and 2 deletions
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image.c
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@ -676,8 +676,8 @@ void img_rotate(img_t *img, degree_t d)
ox = d == DEGREE_90 ? img->x : img->win->w - img->x - img->w * img->zoom; ox = d == DEGREE_90 ? img->x : img->win->w - img->x - img->w * img->zoom;
oy = d == DEGREE_270 ? img->y : img->win->h - img->y - img->h * img->zoom; oy = d == DEGREE_270 ? img->y : img->win->h - img->y - img->h * img->zoom;
img->x = oy + (img->win->w - img->win->h) / 2; img->x = oy + (int)(img->win->w - img->win->h) / 2;
img->y = ox + (img->win->h - img->win->w) / 2; img->y = ox + (int)(img->win->h - img->win->w) / 2;
tmp = img->w; tmp = img->w;
img->w = img->h; img->w = img->h;