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small speedup: IRAM_ATTR_YN colorBalanceFromKelvin

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Frank
2023-07-28 21:04:59 +02:00
parent f966b17f5a
commit adb3a12129
1 changed files with 3 additions and 2 deletions
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5
wled00/colors.cpp
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@@ -232,7 +232,7 @@ bool colorFromHexString(byte* rgb, const char* in) {
}
return true;
}
#if 0 // WLEDMM minf/maxf are defined in libm already
static float minf (float v, float w) // WLEDMM better use standard library fminf()
{
if (w > v) return v;
@@ -244,10 +244,11 @@ static float maxf (float v, float w) // WLEDMM better use standard library fmax
if (w > v) return w;
return v;
}
#endif
// adjust RGB values based on color temperature in K (range [2800-10200]) (https://en.wikipedia.org/wiki/Color_balance)
// called from bus manager when color correction is enabled!
uint32_t colorBalanceFromKelvin(uint16_t kelvin, uint32_t rgb)
uint32_t IRAM_ATTR_YN colorBalanceFromKelvin(uint16_t kelvin, uint32_t rgb) // WLEDMM: IRAM_ATTR_YN
{
//remember so that slow colorKtoRGB() doesn't have to run for every setPixelColor()
static byte correctionRGB[4] = {0,0,0,0};