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color_fade small improvement

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avoids over-blending, and gives a tiny speedup.
This commit is contained in:
Frank
2024-11-14 14:14:36 +01:00
parent 5ea3aa9ce5
commit 81facea82f
1 changed files with 2 additions and 2 deletions
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4
wled00/colors.cpp
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@@ -8,8 +8,7 @@
* color blend function
*/
IRAM_ATTR_YN __attribute__((hot)) uint32_t color_blend(uint32_t color1, uint32_t color2, uint_fast16_t blend, bool b16) {
if(blend == 0) return color1;
if (color1 == color2) return color1; // WLEDMM shortcut
if ((color1 == color2) || (blend == 0)) return color1; // WLEDMM
const uint_fast16_t blendmax = b16 ? 0xFFFF : 0xFF;
if(blend >= blendmax) return color2;
const uint_fast8_t shift = b16 ? 16 : 8;
@@ -73,6 +72,7 @@ IRAM_ATTR_YN uint32_t color_add(uint32_t c1, uint32_t c2, bool fast) // WLEDMM
IRAM_ATTR_YN __attribute__((hot)) uint32_t color_fade(uint32_t c1, uint8_t amount, bool video)
{
if (amount == 255) return c1; // WLEDMM small optimization - plus it avoids over-fading in "video" mode
if (amount == 0) return 0; // WLEDMM shortcut
uint32_t scaledcolor; // color order is: W R G B from MSB to LSB