1 /**
2  * @file lv_color.c
3  *
4  */
5 
6 /*********************
7  *      INCLUDES
8  *********************/
9 #include "lv_color_op_private.h"
10 #include "lv_log.h"
11 
12 /*********************
13  *      DEFINES
14  *********************/
15 
16 /**********************
17  *      TYPEDEFS
18  **********************/
19 
20 /**********************
21  *  STATIC PROTOTYPES
22  **********************/
23 
24 /**********************
25  *  STATIC VARIABLES
26  **********************/
27 
28 /**********************
29  *      MACROS
30  **********************/
31 
32 /**********************
33  *   GLOBAL FUNCTIONS
34  **********************/
35 
lv_color_mix(lv_color_t c1,lv_color_t c2,uint8_t mix)36 lv_color_t LV_ATTRIBUTE_FAST_MEM lv_color_mix(lv_color_t c1, lv_color_t c2, uint8_t mix)
37 {
38     lv_color_t ret;
39 
40     ret.red = LV_UDIV255((uint16_t)c1.red * mix + c2.red * (255 - mix) + LV_COLOR_MIX_ROUND_OFS);
41     ret.green = LV_UDIV255((uint16_t)c1.green * mix + c2.green * (255 - mix) + LV_COLOR_MIX_ROUND_OFS);
42     ret.blue = LV_UDIV255((uint16_t)c1.blue * mix + c2.blue * (255 - mix) + LV_COLOR_MIX_ROUND_OFS);
43     return ret;
44 }
45 
lv_color_mix32(lv_color32_t fg,lv_color32_t bg)46 lv_color32_t lv_color_mix32(lv_color32_t fg, lv_color32_t bg)
47 {
48     if(fg.alpha >= LV_OPA_MAX) {
49         fg.alpha = bg.alpha;
50         return fg;
51     }
52     if(fg.alpha <= LV_OPA_MIN) {
53         return bg;
54     }
55     bg.red = (uint32_t)((uint32_t)fg.red * fg.alpha + (uint32_t)bg.red * (255 - fg.alpha)) >> 8;
56     bg.green = (uint32_t)((uint32_t)fg.green * fg.alpha + (uint32_t)bg.green * (255 - fg.alpha)) >> 8;
57     bg.blue = (uint32_t)((uint32_t)fg.blue * fg.alpha + (uint32_t)bg.blue * (255 - fg.alpha)) >> 8;
58     return bg;
59 }
60 
lv_color_brightness(lv_color_t c)61 uint8_t lv_color_brightness(lv_color_t c)
62 {
63     uint16_t bright = (uint16_t)(3u * c.red + c.green + 4u * c.blue);
64     return (uint8_t)(bright >> 3);
65 }
66 
lv_color_filter_dsc_init(lv_color_filter_dsc_t * dsc,lv_color_filter_cb_t cb)67 void lv_color_filter_dsc_init(lv_color_filter_dsc_t * dsc, lv_color_filter_cb_t cb)
68 {
69     dsc->filter_cb = cb;
70 }
71 
72 /**********************
73  *   STATIC FUNCTIONS
74  **********************/
75