App:Library:LVGL:docs:Overview:Colors
https://docs.lvgl.io/8.2/overview/color.html
Colors
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The color module handles all color-related functions like changing color depth, creating colors from hex code, converting between color depths, mixing colors, etc. The type You may set |
Creating colors
RGB
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Create colors from Red, Green and Blue channel values: //All channels are 0-255 lv_color_t c = lv_color_make(red, green, blue); //From hex code 0x000000..0xFFFFFF interpreted as RED + GREEN + BLUE lv_color_t c = lv_color_hex(0x123456); //From 3 digits. Same as lv_color_hex(0x112233) lv_color_t c = lv_color_hex3(0x123); |
HSV
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Create colors from Hue, Saturation and Value values: //h = 0..359, s = 0..100, v = 0..100 lv_color_t c = lv_color_hsv_to_rgb(h, s, v); //All channels are 0-255 lv_color_hsv_t c_hsv = lv_color_rgb_to_hsv(r, g, b); //From lv_color_t variable lv_color_hsv_t c_hsv = lv_color_to_hsv(color); |
Palette
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LVGL includes Material Design's palette of colors. In this system all named colors have a nominal main color as well as four darker and five lighter variants. The names of the colors are as follows:
To get the main color use For the lighter variants of a palette color use |
Modify and mix colors
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The following functions can modify a color: // Lighten a color. 0: no change, 255: white lv_color_t c = lv_color_lighten(c, lvl); // Darken a color. 0: no change, 255: black lv_color_t c = lv_color_darken(lv_color_t c, lv_opa_t lvl); // Lighten or darken a color. 0: black, 128: no change 255: white lv_color_t c = lv_color_change_lightness(lv_color_t c, lv_opa_t lvl); // Mix two colors with a given ratio 0: full c2, 255: full c1, 128: half c1 and half c2 lv_color_t c = lv_color_mix(c1, c2, ratio); |
Built-in colors
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Opacity
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To describe opacity the
You can also use the |
Color types
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The following variable types are defined by the color module:
The
You can set the current color depth in lv_conf.h, by setting the |
Convert color
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You can convert a color from the current color depth to another. The converter functions return with a number, so you have to use the lv_color_t c; c.red = 0x38; c.green = 0x70; c.blue = 0xCC; lv_color1_t c1; c1.full = lv_color_to1(c); /*Return 1 for light colors, 0 for dark colors*/ lv_color8_t c8; c8.full = lv_color_to8(c); /*Give a 8 bit number with the converted color*/ lv_color16_t c16; c16.full = lv_color_to16(c); /*Give a 16 bit number with the converted color*/ lv_color32_t c24; c32.full = lv_color_to32(c); /*Give a 32 bit number with the converted color*/ |
API
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Typedefs typedef lv_color_t (*lv_color_filter_cb_t)(const struct _lv_color_filter_dsc_t*, lv_color_t, lv_opa_t) typedef struct _lv_color_filter_dsc_t lv_color_filter_dsc_t Enums enum [anonymous]
enum lv_palette_t
Functions LV_EXPORT_CONST_INT(LV_COLOR_DEPTH) LV_EXPORT_CONST_INT(LV_COLOR_16_SWAP) typedef LV_CONCAT3 (uint, LV_COLOR_SIZE, _t) lv_color_int_t typedef LV_CONCAT3 (lv_color, LV_COLOR_DEPTH, _t) lv_color_t static inline uint8_t lv_color_to1(lv_color_t color) static inline uint8_t lv_color_to8(lv_color_t color) static inline uint16_t lv_color_to16(lv_color_t color) static inline uint32_t lv_color_to32(lv_color_t color) static inline uint8_t lv_color_brightness(lv_color_t color)
static inline lv_color_t lv_color_make(uint8_t r, uint8_t g, uint8_t b) static inline lv_color_t lv_color_hex(uint32_t c) static inline lv_color_t lv_color_hex3(uint32_t c) static inline void lv_color_filter_dsc_init(lv_color_filter_dsc_t *dsc, lv_color_filter_cb_t cb) lv_color_t lv_color_lighten(lv_color_t c, lv_opa_t lvl) lv_color_t lv_color_darken(lv_color_t c, lv_opa_t lvl) lv_color_t lv_color_change_lightness(lv_color_t c, lv_opa_t lvl) lv_color_t lv_color_hsv_to_rgb(uint16_t h, uint8_t s, uint8_t v)
lv_color_hsv_t lv_color_rgb_to_hsv(uint8_t r8, uint8_t g8, uint8_t b8)
lv_color_hsv_t lv_color_to_hsv(lv_color_t color)
static inline lv_color_t lv_color_chroma_key(void)
lv_color_t lv_palette_main(lv_palette_t p) static inline lv_color_t lv_color_white(void) static inline lv_color_t lv_color_black(void) lv_color_t lv_palette_lighten(lv_palette_t p, uint8_t lvl) lv_color_t lv_palette_darken(lv_palette_t p, uint8_t lvl) union lv_color1_t
union lv_color8_t
struct _lv_color_filter_dsc_t
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