/** * @file lv_color.h * */ #ifndef LV_COLOR_H #define LV_COLOR_H #ifdef __cplusplus extern "C" { #endif /********************* * INCLUDES *********************/ #include "../lv_conf_internal.h" #include "lv_assert.h" #include "lv_math.h" #include "lv_types.h" /*Error checking*/ #if LV_COLOR_DEPTH == 24 #error "LV_COLOR_DEPTH 24 is deprecated. Use LV_COLOR_DEPTH 32 instead (lv_conf.h)" #endif #if LV_COLOR_DEPTH != 32 && LV_COLOR_SCREEN_TRANSP != 0 #error "LV_COLOR_SCREEN_TRANSP requires LV_COLOR_DEPTH == 32. Set it in lv_conf.h" #endif #if LV_COLOR_DEPTH != 16 && LV_COLOR_16_SWAP != 0 #error "LV_COLOR_16_SWAP requires LV_COLOR_DEPTH == 16. Set it in lv_conf.h" #endif #include /********************* * DEFINES *********************/ LV_EXPORT_CONST_INT(LV_COLOR_DEPTH); LV_EXPORT_CONST_INT(LV_COLOR_16_SWAP); /** * Opacity percentages. */ enum { LV_OPA_TRANSP = 0, LV_OPA_0 = 0, LV_OPA_10 = 25, LV_OPA_20 = 51, LV_OPA_30 = 76, LV_OPA_40 = 102, LV_OPA_50 = 127, LV_OPA_60 = 153, LV_OPA_70 = 178, LV_OPA_80 = 204, LV_OPA_90 = 229, LV_OPA_100 = 255, LV_OPA_COVER = 255, }; #define LV_OPA_MIN 2 /*Opacities below this will be transparent*/ #define LV_OPA_MAX 253 /*Opacities above this will fully cover*/ #if LV_COLOR_DEPTH == 1 #define LV_COLOR_SIZE 8 #elif LV_COLOR_DEPTH == 8 #define LV_COLOR_SIZE 8 #elif LV_COLOR_DEPTH == 16 #define LV_COLOR_SIZE 16 #elif LV_COLOR_DEPTH == 32 #define LV_COLOR_SIZE 32 #else #error "Invalid LV_COLOR_DEPTH in lv_conf.h! Set it to 1, 8, 16 or 32!" #endif #if defined(__cplusplus) && !defined(_LV_COLOR_HAS_MODERN_CPP) /** * MSVC compiler's definition of the __cplusplus indicating 199711L regardless to C++ standard version * see https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-cplusplus * so we use _MSC_VER macro instead of __cplusplus */ #ifdef _MSC_VER #if _MSC_VER >= 1900 /*Visual Studio 2015*/ #define _LV_COLOR_HAS_MODERN_CPP 1 #endif #else #if __cplusplus >= 201103L #define _LV_COLOR_HAS_MODERN_CPP 1 #endif #endif #endif /*__cplusplus*/ #ifndef _LV_COLOR_HAS_MODERN_CPP #define _LV_COLOR_HAS_MODERN_CPP 0 #endif #if _LV_COLOR_HAS_MODERN_CPP /*Fix msvc compiler error C4576 inside C++ code*/ #define _LV_COLOR_MAKE_TYPE_HELPER lv_color_t #else #define _LV_COLOR_MAKE_TYPE_HELPER (lv_color_t) #endif /*--------------------------------------- * Macros for all existing color depths * to set/get values of the color channels *------------------------------------------*/ # define LV_COLOR_SET_R1(c, v) (c).ch.red = (uint8_t)((v) & 0x1) # define LV_COLOR_SET_G1(c, v) (c).ch.green = (uint8_t)((v) & 0x1) # define LV_COLOR_SET_B1(c, v) (c).ch.blue = (uint8_t)((v) & 0x1) # define LV_COLOR_SET_A1(c, v) do {} while(0) # define LV_COLOR_GET_R1(c) (c).ch.red # define LV_COLOR_GET_G1(c) (c).ch.green # define LV_COLOR_GET_B1(c) (c).ch.blue # define LV_COLOR_GET_A1(c) 0xFF # define _LV_COLOR_ZERO_INITIALIZER1 {0x00} # define LV_COLOR_MAKE1(r8, g8, b8) {(uint8_t)((b8 >> 7) | (g8 >> 7) | (r8 >> 7))} # define LV_COLOR_SET_R8(c, v) (c).ch.red = (uint8_t)((v) & 0x7U) # define LV_COLOR_SET_G8(c, v) (c).ch.green = (uint8_t)((v) & 0x7U) # define LV_COLOR_SET_B8(c, v) (c).ch.blue = (uint8_t)((v) & 0x3U) # define LV_COLOR_SET_A8(c, v) do {} while(0) # define LV_COLOR_GET_R8(c) (c).ch.red # define LV_COLOR_GET_G8(c) (c).ch.green # define LV_COLOR_GET_B8(c) (c).ch.blue # define LV_COLOR_GET_A8(c) 0xFF # define _LV_COLOR_ZERO_INITIALIZER8 {{0x00, 0x00, 0x00}} # define LV_COLOR_MAKE8(r8, g8, b8) {{(uint8_t)((b8 >> 6) & 0x3U), (uint8_t)((g8 >> 5) & 0x7U), (uint8_t)((r8 >> 5) & 0x7U)}} # define LV_COLOR_SET_R16(c, v) (c).ch.red = (uint8_t)((v) & 0x1FU) #if LV_COLOR_16_SWAP == 0 # define LV_COLOR_SET_G16(c, v) (c).ch.green = (uint8_t)((v) & 0x3FU) #else # define LV_COLOR_SET_G16(c, v) {(c).ch.green_h = (uint8_t)(((v) >> 3) & 0x7); (c).ch.green_l = (uint8_t)((v) & 0x7);} #endif # define LV_COLOR_SET_B16(c, v) (c).ch.blue = (uint8_t)((v) & 0x1FU) # define LV_COLOR_SET_A16(c, v) do {} while(0) # define LV_COLOR_GET_R16(c) (c).ch.red #if LV_COLOR_16_SWAP == 0 # define LV_COLOR_GET_G16(c) (c).ch.green #else # define LV_COLOR_GET_G16(c) (((c).ch.green_h << 3) + (c).ch.green_l) #endif # define LV_COLOR_GET_B16(c) (c).ch.blue # define LV_COLOR_GET_A16(c) 0xFF #if LV_COLOR_16_SWAP == 0 # define _LV_COLOR_ZERO_INITIALIZER16 {{0x00, 0x00, 0x00}} # define LV_COLOR_MAKE16(r8, g8, b8) {{(uint8_t)((b8 >> 3) & 0x1FU), (uint8_t)((g8 >> 2) & 0x3FU), (uint8_t)((r8 >> 3) & 0x1FU)}} #else # define _LV_COLOR_ZERO_INITIALIZER16 {{0x00, 0x00, 0x00, 0x00}} # define LV_COLOR_MAKE16(r8, g8, b8) {{(uint8_t)((g8 >> 5) & 0x7U), (uint8_t)((r8 >> 3) & 0x1FU), (uint8_t)((b8 >> 3) & 0x1FU), (uint8_t)((g8 >> 2) & 0x7U)}} #endif # define LV_COLOR_SET_R32(c, v) (c).ch.red = (uint8_t)((v) & 0xFF) # define LV_COLOR_SET_G32(c, v) (c).ch.green = (uint8_t)((v) & 0xFF) # define LV_COLOR_SET_B32(c, v) (c).ch.blue = (uint8_t)((v) & 0xFF) # define LV_COLOR_SET_A32(c, v) (c).ch.alpha = (uint8_t)((v) & 0xFF) # define LV_COLOR_GET_R32(c) (c).ch.red # define LV_COLOR_GET_G32(c) (c).ch.green # define LV_COLOR_GET_B32(c) (c).ch.blue # define LV_COLOR_GET_A32(c) (c).ch.alpha # define _LV_COLOR_ZERO_INITIALIZER32 {{0x00, 0x00, 0x00, 0x00}} # define LV_COLOR_MAKE32(r8, g8, b8) {{b8, g8, r8, 0xff}} /*Fix 0xff alpha*/ /*--------------------------------------- * Macros for the current color depth * to set/get values of the color channels *------------------------------------------*/ #define LV_COLOR_SET_R(c, v) LV_CONCAT(LV_COLOR_SET_R, LV_COLOR_DEPTH)(c, v) #define LV_COLOR_SET_G(c, v) LV_CONCAT(LV_COLOR_SET_G, LV_COLOR_DEPTH)(c, v) #define LV_COLOR_SET_B(c, v) LV_CONCAT(LV_COLOR_SET_B, LV_COLOR_DEPTH)(c, v) #define LV_COLOR_SET_A(c, v) LV_CONCAT(LV_COLOR_SET_A, LV_COLOR_DEPTH)(c, v) #define LV_COLOR_GET_R(c) LV_CONCAT(LV_COLOR_GET_R, LV_COLOR_DEPTH)(c) #define LV_COLOR_GET_G(c) LV_CONCAT(LV_COLOR_GET_G, LV_COLOR_DEPTH)(c) #define LV_COLOR_GET_B(c) LV_CONCAT(LV_COLOR_GET_B, LV_COLOR_DEPTH)(c) #define LV_COLOR_GET_A(c) LV_CONCAT(LV_COLOR_GET_A, LV_COLOR_DEPTH)(c) #define _LV_COLOR_ZERO_INITIALIZER LV_CONCAT(_LV_COLOR_ZERO_INITIALIZER, LV_COLOR_DEPTH) #define LV_COLOR_MAKE(r8, g8, b8) LV_CONCAT(LV_COLOR_MAKE, LV_COLOR_DEPTH)(r8, g8, b8) /********************** * TYPEDEFS **********************/ typedef union { uint8_t full; /*must be declared first to set all bits of byte via initializer list*/ union { uint8_t blue : 1; uint8_t green : 1; uint8_t red : 1; } ch; } lv_color1_t; typedef union { struct { uint8_t blue : 2; uint8_t green : 3; uint8_t red : 3; } ch; uint8_t full; } lv_color8_t; typedef union { struct { #if LV_COLOR_16_SWAP == 0 uint16_t blue : 5; uint16_t green : 6; uint16_t red : 5; #else uint16_t green_h : 3; uint16_t red : 5; uint16_t blue : 5; uint16_t green_l : 3; #endif } ch; uint16_t full; } lv_color16_t; typedef union { struct { uint8_t blue; uint8_t green; uint8_t red; uint8_t alpha; } ch; uint32_t full; } lv_color32_t; typedef LV_CONCAT3(uint, LV_COLOR_SIZE, _t) lv_color_int_t; typedef LV_CONCAT3(lv_color, LV_COLOR_DEPTH, _t) lv_color_t; typedef struct { uint16_t h; uint8_t s; uint8_t v; } lv_color_hsv_t; //! @cond Doxygen_Suppress /*No idea where the guard is required but else throws warnings in the docs*/ typedef uint8_t lv_opa_t; //! @endcond struct _lv_color_filter_dsc_t; 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_cb_t filter_cb; void * user_data; } lv_color_filter_dsc_t; typedef enum { LV_PALETTE_RED, LV_PALETTE_PINK, LV_PALETTE_PURPLE, LV_PALETTE_DEEP_PURPLE, LV_PALETTE_INDIGO, LV_PALETTE_BLUE, LV_PALETTE_LIGHT_BLUE, LV_PALETTE_CYAN, LV_PALETTE_TEAL, LV_PALETTE_GREEN, LV_PALETTE_LIGHT_GREEN, LV_PALETTE_LIME, LV_PALETTE_YELLOW, LV_PALETTE_AMBER, LV_PALETTE_ORANGE, LV_PALETTE_DEEP_ORANGE, LV_PALETTE_BROWN, LV_PALETTE_BLUE_GREY, LV_PALETTE_GREY, _LV_PALETTE_LAST, LV_PALETTE_NONE = 0xff, } lv_palette_t; /********************** * GLOBAL PROTOTYPES **********************/ /*In color conversations: * - When converting to bigger color type the LSB weight of 1 LSB is calculated * E.g. 16 bit Red has 5 bits * 8 bit Red has 3 bits * ---------------------- * 8 bit red LSB = (2^5 - 1) / (2^3 - 1) = 31 / 7 = 4 * * - When calculating to smaller color type simply shift out the LSBs * E.g. 8 bit Red has 3 bits * 16 bit Red has 5 bits * ---------------------- * Shift right with 5 - 3 = 2 */ static inline uint8_t lv_color_to1(lv_color_t color) { #if LV_COLOR_DEPTH == 1 return color.full; #elif LV_COLOR_DEPTH == 8 if((LV_COLOR_GET_R(color) & 0x4) || (LV_COLOR_GET_G(color) & 0x4) || (LV_COLOR_GET_B(color) & 0x2)) { return 1; } else { return 0; } #elif LV_COLOR_DEPTH == 16 if((LV_COLOR_GET_R(color) & 0x10) || (LV_COLOR_GET_G(color) & 0x20) || (LV_COLOR_GET_B(color) & 0x10)) { return 1; } else { return 0; } #elif LV_COLOR_DEPTH == 32 if((LV_COLOR_GET_R(color) & 0x80) || (LV_COLOR_GET_G(color) & 0x80) || (LV_COLOR_GET_B(color) & 0x80)) { return 1; } else { return 0; } #endif } static inline uint8_t lv_color_to8(lv_color_t color) { #if LV_COLOR_DEPTH == 1 if(color.full == 0) return 0; else return 0xFF; #elif LV_COLOR_DEPTH == 8 return color.full; #elif LV_COLOR_DEPTH == 16 lv_color8_t ret; LV_COLOR_SET_R8(ret, LV_COLOR_GET_R(color) >> 2); /*5 - 3 = 2*/ LV_COLOR_SET_G8(ret, LV_COLOR_GET_G(color) >> 3); /*6 - 3 = 3*/ LV_COLOR_SET_B8(ret, LV_COLOR_GET_B(color) >> 3); /*5 - 2 = 3*/ return ret.full; #elif LV_COLOR_DEPTH == 32 lv_color8_t ret; LV_COLOR_SET_R8(ret, LV_COLOR_GET_R(color) >> 5); /*8 - 3 = 5*/ LV_COLOR_SET_G8(ret, LV_COLOR_GET_G(color) >> 5); /*8 - 3 = 5*/ LV_COLOR_SET_B8(ret, LV_COLOR_GET_B(color) >> 6); /*8 - 2 = 6*/ return ret.full; #endif } static inline uint16_t lv_color_to16(lv_color_t color) { #if LV_COLOR_DEPTH == 1 if(color.full == 0) return 0; else return 0xFFFF; #elif LV_COLOR_DEPTH == 8 lv_color16_t ret; LV_COLOR_SET_R16(ret, LV_COLOR_GET_R(color) * 4); /*(2^5 - 1)/(2^3 - 1) = 31/7 = 4*/ LV_COLOR_SET_G16(ret, LV_COLOR_GET_G(color) * 9); /*(2^6 - 1)/(2^3 - 1) = 63/7 = 9*/ LV_COLOR_SET_B16(ret, LV_COLOR_GET_B(color) * 10); /*(2^5 - 1)/(2^2 - 1) = 31/3 = 10*/ return ret.full; #elif LV_COLOR_DEPTH == 16 return color.full; #elif LV_COLOR_DEPTH == 32 lv_color16_t ret; LV_COLOR_SET_R16(ret, LV_COLOR_GET_R(color) >> 3); /*8 - 5 = 3*/ LV_COLOR_SET_G16(ret, LV_COLOR_GET_G(color) >> 2); /*8 - 6 = 2*/ LV_COLOR_SET_B16(ret, LV_COLOR_GET_B(color) >> 3); /*8 - 5 = 3*/ return ret.full; #endif } static inline uint32_t lv_color_to32(lv_color_t color) { #if LV_COLOR_DEPTH == 1 if(color.full == 0) return 0xFF000000; else return 0xFFFFFFFF; #elif LV_COLOR_DEPTH == 8 lv_color32_t ret; LV_COLOR_SET_R32(ret, LV_COLOR_GET_R(color) * 36); /*(2^8 - 1)/(2^3 - 1) = 255/7 = 36*/ LV_COLOR_SET_G32(ret, LV_COLOR_GET_G(color) * 36); /*(2^8 - 1)/(2^3 - 1) = 255/7 = 36*/ LV_COLOR_SET_B32(ret, LV_COLOR_GET_B(color) * 85); /*(2^8 - 1)/(2^2 - 1) = 255/3 = 85*/ LV_COLOR_SET_A32(ret, 0xFF); return ret.full; #elif LV_COLOR_DEPTH == 16 /** * The floating point math for conversion is: * valueto = valuefrom * ( (2^bitsto - 1) / (float)(2^bitsfrom - 1) ) * The faster integer math for conversion is: * valueto = ( valuefrom * multiplier + adder ) >> divisor * multiplier = FLOOR( ( (2^bitsto - 1) << divisor ) / (float)(2^bitsfrom - 1) ) * * Find the first divisor where ( adder >> divisor ) <= 0 * * 5-bit to 8-bit: ( 31 * multiplier + adder ) >> divisor = 255 * divisor multiplier adder min (0) max (31) * 0 8 7 7 255 * 1 16 14 7 255 * 2 32 28 7 255 * 3 65 25 3 255 * 4 131 19 1 255 * 5 263 7 0 255 * * 6-bit to 8-bit: 255 = ( 63 * multiplier + adder ) >> divisor * divisor multiplier adder min (0) max (63) * 0 4 3 3 255 * 1 8 6 3 255 * 2 16 12 3 255 * 3 32 24 3 255 * 4 64 48 3 255 * 5 129 33 1 255 * 6 259 3 0 255 */ lv_color32_t ret; LV_COLOR_SET_R32(ret, (LV_COLOR_GET_R(color) * 263 + 7) >> 5); LV_COLOR_SET_G32(ret, (LV_COLOR_GET_G(color) * 259 + 3) >> 6); LV_COLOR_SET_B32(ret, (LV_COLOR_GET_B(color) * 263 + 7) >> 5); LV_COLOR_SET_A32(ret, 0xFF); return ret.full; #elif LV_COLOR_DEPTH == 32 return color.full; #endif } //! @cond Doxygen_Suppress /** * Mix two colors with a given ratio. * @param c1 the first color to mix (usually the foreground) * @param c2 the second color to mix (usually the background) * @param mix The ratio of the colors. 0: full `c2`, 255: full `c1`, 127: half `c1` and half`c2` * @return the mixed color */ LV_ATTRIBUTE_FAST_MEM static inline lv_color_t lv_color_mix(lv_color_t c1, lv_color_t c2, uint8_t mix) { lv_color_t ret; #if LV_COLOR_DEPTH == 16 && LV_COLOR_16_SWAP == 0 /*Source: https://stackoverflow.com/a/50012418/1999969*/ mix = (mix + 4) >> 3; uint32_t bg = (uint32_t)((uint32_t)c2.full | ((uint32_t)c2.full << 16)) & 0x7E0F81F; /*0b00000111111000001111100000011111*/ uint32_t fg = (uint32_t)((uint32_t)c1.full | ((uint32_t)c1.full << 16)) & 0x7E0F81F; uint32_t result = ((((fg - bg) * mix) >> 5) + bg) & 0x7E0F81F; ret.full = (uint16_t)((result >> 16) | result); #elif LV_COLOR_DEPTH != 1 /*LV_COLOR_DEPTH == 8, 16 or 32*/ LV_COLOR_SET_R(ret, LV_UDIV255((uint16_t)LV_COLOR_GET_R(c1) * mix + LV_COLOR_GET_R(c2) * (255 - mix) + LV_COLOR_MIX_ROUND_OFS)); LV_COLOR_SET_G(ret, LV_UDIV255((uint16_t)LV_COLOR_GET_G(c1) * mix + LV_COLOR_GET_G(c2) * (255 - mix) + LV_COLOR_MIX_ROUND_OFS)); LV_COLOR_SET_B(ret, LV_UDIV255((uint16_t)LV_COLOR_GET_B(c1) * mix + LV_COLOR_GET_B(c2) * (255 - mix) + LV_COLOR_MIX_ROUND_OFS)); LV_COLOR_SET_A(ret, 0xFF); #else /*LV_COLOR_DEPTH == 1*/ ret.full = mix > LV_OPA_50 ? c1.full : c2.full; #endif return ret; } LV_ATTRIBUTE_FAST_MEM static inline void lv_color_premult(lv_color_t c, uint8_t mix, uint16_t * out) { #if LV_COLOR_DEPTH != 1 out[0] = (uint16_t)LV_COLOR_GET_R(c) * mix; out[1] = (uint16_t)LV_COLOR_GET_G(c) * mix; out[2] = (uint16_t)LV_COLOR_GET_B(c) * mix; #else (void) mix; /*Pre-multiplication can't be used with 1 bpp*/ out[0] = LV_COLOR_GET_R(c); out[1] = LV_COLOR_GET_G(c); out[2] = LV_COLOR_GET_B(c); #endif } /** * Mix two colors with a given ratio. It runs faster then `lv_color_mix` but requires some pre computation. * @param premult_c1 The first color. Should be preprocessed with `lv_color_premult(c1)` * @param c2 The second color. As it is no pre computation required on it * @param mix The ratio of the colors. 0: full `c1`, 255: full `c2`, 127: half `c1` and half `c2`. * Should be modified like mix = `255 - mix` * @return the mixed color * @note 255 won't give clearly `c1`. */ LV_ATTRIBUTE_FAST_MEM static inline lv_color_t lv_color_mix_premult(uint16_t * premult_c1, lv_color_t c2, uint8_t mix) { lv_color_t ret; #if LV_COLOR_DEPTH != 1 /*LV_COLOR_DEPTH == 8 or 32*/ LV_COLOR_SET_R(ret, LV_UDIV255(premult_c1[0] + LV_COLOR_GET_R(c2) * mix + LV_COLOR_MIX_ROUND_OFS)); LV_COLOR_SET_G(ret, LV_UDIV255(premult_c1[1] + LV_COLOR_GET_G(c2) * mix + LV_COLOR_MIX_ROUND_OFS)); LV_COLOR_SET_B(ret, LV_UDIV255(premult_c1[2] + LV_COLOR_GET_B(c2) * mix + LV_COLOR_MIX_ROUND_OFS)); LV_COLOR_SET_A(ret, 0xFF); #else /*LV_COLOR_DEPTH == 1*/ /*Restore color1*/ lv_color_t c1; LV_COLOR_SET_R(c1, premult_c1[0]); LV_COLOR_SET_G(c1, premult_c1[1]); LV_COLOR_SET_B(c1, premult_c1[2]); ret.full = mix > LV_OPA_50 ? c2.full : c1.full; #endif return ret; } /** * Mix two colors. Both color can have alpha value. * @param bg_color background color * @param bg_opa alpha of the background color * @param fg_color foreground color * @param fg_opa alpha of the foreground color * @param res_color the result color * @param res_opa the result opacity */ LV_ATTRIBUTE_FAST_MEM static inline void lv_color_mix_with_alpha(lv_color_t bg_color, lv_opa_t bg_opa, lv_color_t fg_color, lv_opa_t fg_opa, lv_color_t * res_color, lv_opa_t * res_opa) { /*Pick the foreground if it's fully opaque or the Background is fully transparent*/ if(fg_opa >= LV_OPA_MAX || bg_opa <= LV_OPA_MIN) { res_color->full = fg_color.full; *res_opa = fg_opa; } /*Transparent foreground: use the Background*/ else if(fg_opa <= LV_OPA_MIN) { res_color->full = bg_color.full; *res_opa = bg_opa; } /*Opaque background: use simple mix*/ else if(bg_opa >= LV_OPA_MAX) { *res_color = lv_color_mix(fg_color, bg_color, fg_opa); *res_opa = LV_OPA_COVER; } /*Both colors have alpha. Expensive calculation need to be applied*/ else { /*Save the parameters and the result. If they will be asked again don't compute again*/ static lv_opa_t fg_opa_save = 0; static lv_opa_t bg_opa_save = 0; static lv_color_t fg_color_save = _LV_COLOR_ZERO_INITIALIZER; static lv_color_t bg_color_save = _LV_COLOR_ZERO_INITIALIZER; static lv_color_t res_color_saved = _LV_COLOR_ZERO_INITIALIZER; static lv_opa_t res_opa_saved = 0; if(fg_opa != fg_opa_save || bg_opa != bg_opa_save || fg_color.full != fg_color_save.full || bg_color.full != bg_color_save.full) { fg_opa_save = fg_opa; bg_opa_save = bg_opa; fg_color_save.full = fg_color.full; bg_color_save.full = bg_color.full; /*Info: * https://en.wikipedia.org/wiki/Alpha_compositing#Analytical_derivation_of_the_over_operator*/ res_opa_saved = 255 - ((uint16_t)((uint16_t)(255 - fg_opa) * (255 - bg_opa)) >> 8); LV_ASSERT(res_opa_saved != 0); lv_opa_t ratio = (uint16_t)((uint16_t)fg_opa * 255) / res_opa_saved; res_color_saved = lv_color_mix(fg_color, bg_color, ratio); } res_color->full = res_color_saved.full; *res_opa = res_opa_saved; } } //! @endcond /** * Get the brightness of a color * @param color a color * @return the brightness [0..255] */ static inline uint8_t lv_color_brightness(lv_color_t color) { lv_color32_t c32; c32.full = lv_color_to32(color); uint16_t bright = (uint16_t)(3u * LV_COLOR_GET_R32(c32) + LV_COLOR_GET_B32(c32) + 4u * LV_COLOR_GET_G32(c32)); return (uint8_t)(bright >> 3); } static inline lv_color_t lv_color_make(uint8_t r, uint8_t g, uint8_t b) { return _LV_COLOR_MAKE_TYPE_HELPER LV_COLOR_MAKE(r, g, b); } static inline lv_color_t lv_color_hex(uint32_t c) { #if LV_COLOR_DEPTH == 16 lv_color_t r; #if LV_COLOR_16_SWAP == 0 /* Convert a 4 bytes per pixel in format ARGB32 to R5G6B5 format naive way (by calling lv_color_make with components): r = ((c & 0xFF0000) >> 19) g = ((c & 0xFF00) >> 10) b = ((c & 0xFF) >> 3) rgb565 = (r << 11) | (g << 5) | b That's 3 mask, 5 bitshift and 2 or operations A bit better: r = ((c & 0xF80000) >> 8) g = ((c & 0xFC00) >> 5) b = ((c & 0xFF) >> 3) rgb565 = r | g | b That's 3 mask, 3 bitshifts and 2 or operations */ r.full = (uint16_t)(((c & 0xF80000) >> 8) | ((c & 0xFC00) >> 5) | ((c & 0xFF) >> 3)); #else /* We want: rrrr rrrr GGGg gggg bbbb bbbb => gggb bbbb rrrr rGGG */ r.full = (uint16_t)(((c & 0xF80000) >> 16) | ((c & 0xFC00) >> 13) | ((c & 0x1C00) << 3) | ((c & 0xF8) << 5)); #endif return r; #elif LV_COLOR_DEPTH == 32 lv_color_t r; r.full = c | 0xFF000000; return r; #else /*LV_COLOR_DEPTH == 8*/ return lv_color_make((uint8_t)((c >> 16) & 0xFF), (uint8_t)((c >> 8) & 0xFF), (uint8_t)(c & 0xFF)); #endif } static inline lv_color_t lv_color_hex3(uint32_t c) { return lv_color_make((uint8_t)(((c >> 4) & 0xF0) | ((c >> 8) & 0xF)), (uint8_t)((c & 0xF0) | ((c & 0xF0) >> 4)), (uint8_t)((c & 0xF) | ((c & 0xF) << 4))); } static inline void lv_color_filter_dsc_init(lv_color_filter_dsc_t * dsc, lv_color_filter_cb_t cb) { dsc->filter_cb = cb; } //! @cond Doxygen_Suppress //! LV_ATTRIBUTE_FAST_MEM void lv_color_fill(lv_color_t * buf, lv_color_t color, uint32_t px_num); //! @endcond 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); /** * Convert a HSV color to RGB * @param h hue [0..359] * @param s saturation [0..100] * @param v value [0..100] * @return the given RGB color in RGB (with LV_COLOR_DEPTH depth) */ lv_color_t lv_color_hsv_to_rgb(uint16_t h, uint8_t s, uint8_t v); /** * Convert a 32-bit RGB color to HSV * @param r8 8-bit red * @param g8 8-bit green * @param b8 8-bit blue * @return the given RGB color in HSV */ lv_color_hsv_t lv_color_rgb_to_hsv(uint8_t r8, uint8_t g8, uint8_t b8); /** * Convert a color to HSV * @param color color * @return the given color in HSV */ lv_color_hsv_t lv_color_to_hsv(lv_color_t color); /** * Just a wrapper around LV_COLOR_CHROMA_KEY because it might be more convenient to use a function is some cases * @return LV_COLOR_CHROMA_KEY */ static inline lv_color_t lv_color_chroma_key(void) { return LV_COLOR_CHROMA_KEY; } /********************** * PREDEFINED COLORS **********************/ /*Source: https://vuetifyjs.com/en/styles/colors/#material-colors*/ lv_color_t lv_palette_main(lv_palette_t p); static inline lv_color_t lv_color_white(void) { return lv_color_make(0xff, 0xff, 0xff); } static inline lv_color_t lv_color_black(void) { return lv_color_make(0x00, 0x0, 0x00); } 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); /********************** * MACROS **********************/ #ifdef __cplusplus } /*extern "C"*/ #endif #endif /*LV_COLOR_H*/