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| author | Harry Jeffery <harry@exec64.co.uk> | 2015-11-11 19:44:30 +0000 |
|---|---|---|
| committer | Harry Jeffery <harry@exec64.co.uk> | 2015-11-11 19:44:30 +0000 |
| commit | 6adc823b4ecd0bd95d56479188665b92d7e07fbf (patch) | |
| tree | a5e381a46ebca9b919b74eefe61e7e0517d71ff0 | |
| parent | 2df8dcd7b1362456c13ec62798c0538e42e79ca0 (diff) | |
| download | imv-6adc823b4ecd0bd95d56479188665b92d7e07fbf.tar.gz | |
Tweak scaling
| -rw-r--r-- | src/viewport.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/src/viewport.c b/src/viewport.c index 5a7621b..5a1d44d 100644 --- a/src/viewport.c +++ b/src/viewport.c @@ -94,11 +94,13 @@ void imv_viewport_zoom(struct imv_viewport *view, const struct imv_image *img, e const int wc_x = ww/2; const int wc_y = wh/2; - view->scale += amount * 0.1; - if(view->scale > 100) - view->scale = 10; - else if (view->scale < 0.01) - view->scale = 0.1; + view->scale += (view->scale / img->width) * amount * 20; + const int min_scale = 0.01; + const int max_scale = 100; + if(view->scale > max_scale) + view->scale = max_scale; + else if (view->scale < min_scale) + view->scale = min_scale; if(view->scale < prevScale) { if(scaledWidth < ww) { |