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bring back zoom_levels (#156)

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this still keeps the shorter zoom logic, but adds back the zoom_levels
array so that stay close to sxiv.

for users who would like to have the zoom step behavior see:
https://github.com/nsxiv/nsxiv/pull/156#issuecomment-975182631
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N-R-K 2021-12-01 18:27:17 +06:00 committed by GitHub
parent 5e0b715ecd
commit 79b8fefcc4
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2 changed files with 18 additions and 6 deletions
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11
config.def.h
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@ -32,10 +32,13 @@ static const suffixmode_t TITLE_SUFFIXMODE = SUFFIX_BASENAME;
#endif
#ifdef _IMAGE_CONFIG
/* zoom level of 1.0 means 100% */
static const float ZOOM_MIN = 0.01;
static const float ZOOM_MAX = 20.0;
static const float ZOOM_STEP = 1.2599210498948732; /* 2^(1/3) */
/* levels (in percent) to use when zooming via '-' and '+':
* (first/last value is used as min/max zoom level)
*/
static const float zoom_levels[] = {
12.5, 25.0, 50.0, 75.0,
100.0, 150.0, 200.0, 400.0, 800.0
};
/* default slideshow delay (in sec, overwritten via -S option): */
static const int SLIDESHOW_DELAY = 5;

13
image.c
View file

@ -43,6 +43,9 @@ enum { DEF_GIF_DELAY = 75 };
enum { DEF_WEBP_DELAY = 75 };
#endif
static const float ZOOM_MIN = zoom_levels[0] / 100;
static const float ZOOM_MAX = zoom_levels[ARRLEN(zoom_levels)-1] / 100;
void img_init(img_t *img, win_t *win)
{
imlib_context_set_display(win->env.dpy);
@ -699,8 +702,14 @@ bool img_zoom_to(img_t *img, float z)
bool img_zoom(img_t *img, int d)
{
const float z = img->zoom * (d > 0 ? ZOOM_STEP : 1/ZOOM_STEP);
return img_zoom_to(img, z);
int i = d > 0 ? 0 : ARRLEN(zoom_levels)-1;
while (i >= 0 && i < ARRLEN(zoom_levels) && (d > 0 ?
zoom_levels[i]/100 <= img->zoom : zoom_levels[i]/100 >= img->zoom))
{
i += d;
}
i = MIN(MAX(i, 0), ARRLEN(zoom_levels)-1);
return img_zoom_to(img, zoom_levels[i]/100);
}
bool img_pos(img_t *img, float x, float y)