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color: add function to get random color

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Thilo Graf
2019-04-02 16:34:56 +02:00
parent ef0cb42b85
commit 0c32280363
3 changed files with 40 additions and 0 deletions
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29
src/gui/color.cpp
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@@ -36,6 +36,7 @@
#include <gui/color.h>
#include <stdio.h>
#include <math.h>
#include <system/debug.h>
#include <driver/framebuffer.h>
@@ -258,3 +259,31 @@ void getItemColors(fb_pixel_t &t, fb_pixel_t &b, bool selected, bool marked, boo
t = toggle_background ? (toggle_enlighten ? COL_MENUCONTENT_TEXT : COL_MENUCONTENTDARK_TEXT) : COL_MENUCONTENT_TEXT;
b = toggle_background ? (toggle_enlighten ? COL_MENUCONTENT_PLUS_1 : COL_MENUCONTENTDARK_PLUS_0) : COL_MENUCONTENT_PLUS_0;
}
fb_pixel_t getRandomColor(col_range_t range_r, col_range_t range_g, col_range_t range_b, uint8_t Alpha)
{
if (!range_r.min || !range_g.min || !range_b.min)
{
dprintf(DEBUG_NORMAL, "\033[31m[color.cpp] [Error:]\033[0m %s: color range min value < 1 in argument, allowed values are 1-255 [r: min%u/max%u] [g: min%u/max%u] [b: min%u/max%u]\n",__func__, range_r.min, range_r.max, range_g.min, range_g.max, range_b.min, range_b.max);
return 0;
}
uint32_t seed[3];
uint8_t r, g, b, a;
srand(range_r.min);
r = rand_r(&seed[0]) % range_r.max;
srand(range_g.min);
g = rand_r(&seed[1]) % range_g.max;
srand(range_b.min);
b = rand_r(&seed[2]) % range_b.max;
a = Alpha;
int color = convertSetupColor2RGB(r, g, b);
int alpha = a ? (convertSetupAlpha2Alpha(a)) : 0xFF;
return (((alpha << 24) & 0xFF000000) | color);
}