| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /// @file crgb.cpp | ||
| 2 | /// Utility functions for the red, green, and blue (RGB) pixel struct | ||
| 3 | |||
| 4 | #define FASTLED_INTERNAL | ||
| 5 | #include "crgb.h" | ||
| 6 | #include "FastLED.h" | ||
| 7 | |||
| 8 | #include "lib8tion/math8.h" | ||
| 9 | |||
| 10 | #include "fl/namespace.h" | ||
| 11 | |||
| 12 | FASTLED_NAMESPACE_BEGIN | ||
| 13 | |||
| 14 | |||
| 15 | ✗ | CRGB CRGB::computeAdjustment(uint8_t scale, const CRGB &colorCorrection, | |
| 16 | const CRGB &colorTemperature) { | ||
| 17 | #if defined(NO_CORRECTION) && (NO_CORRECTION == 1) | ||
| 18 | return CRGB(scale, scale, scale); | ||
| 19 | #else | ||
| 20 | ✗ | CRGB adj(0, 0, 0); | |
| 21 | ✗ | if (scale > 0) { | |
| 22 | ✗ | for (uint8_t i = 0; i < 3; ++i) { | |
| 23 | ✗ | uint8_t cc = colorCorrection.raw[i]; | |
| 24 | ✗ | uint8_t ct = colorTemperature.raw[i]; | |
| 25 | ✗ | if (cc > 0 && ct > 0) { | |
| 26 | // Optimized for AVR size. This function is only called very | ||
| 27 | // infrequently so size matters more than speed. | ||
| 28 | ✗ | uint32_t work = (((uint16_t)cc) + 1); | |
| 29 | ✗ | work *= (((uint16_t)ct) + 1); | |
| 30 | ✗ | work *= scale; | |
| 31 | ✗ | work /= 0x10000L; | |
| 32 | ✗ | adj.raw[i] = work & 0xFF; | |
| 33 | } | ||
| 34 | } | ||
| 35 | } | ||
| 36 | ✗ | return adj; | |
| 37 | #endif | ||
| 38 | } | ||
| 39 | |||
| 40 | ✗ | CRGB CRGB::blend(const CRGB &p1, const CRGB &p2, fract8 amountOfP2) { | |
| 41 | ✗ | return CRGB(blend8(p1.r, p2.r, amountOfP2), blend8(p1.g, p2.g, amountOfP2), | |
| 42 | ✗ | blend8(p1.b, p2.b, amountOfP2)); | |
| 43 | } | ||
| 44 | |||
| 45 | ✗ | CRGB CRGB::blendAlphaMaxChannel(const CRGB &upper, const CRGB &lower) { | |
| 46 | // Use luma of upper pixel as alpha (0..255) | ||
| 47 | ✗ | uint8_t max_component = 0; | |
| 48 | ✗ | for (int i = 0; i < 3; ++i) { | |
| 49 | ✗ | if (upper.raw[i] > max_component) { | |
| 50 | ✗ | max_component = upper.raw[i]; | |
| 51 | } | ||
| 52 | } | ||
| 53 | // uint8_t alpha = upper.getLuma(); | ||
| 54 | // blend(lower, upper, alpha) → (lower * (255−alpha) + upper * alpha) / 256 | ||
| 55 | ✗ | uint8_t amountOf2 = 255 - max_component; | |
| 56 | ✗ | return CRGB::blend(upper, lower, amountOf2); | |
| 57 | } | ||
| 58 | |||
| 59 | 27044 | CRGB &CRGB::nscale8(uint8_t scaledown) { | |
| 60 | 27044 | nscale8x3(r, g, b, scaledown); | |
| 61 | 27044 | return *this; | |
| 62 | } | ||
| 63 | |||
| 64 | /// Add one CRGB to another, saturating at 0xFF for each channel | ||
| 65 | 35737 | CRGB &CRGB::operator+=(const CRGB &rhs) { | |
| 66 |
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35737 | r = qadd8(r, rhs.r); |
| 67 |
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35737 | g = qadd8(g, rhs.g); |
| 68 |
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35737 | b = qadd8(b, rhs.b); |
| 69 | 35737 | return *this; | |
| 70 | } | ||
| 71 | |||
| 72 | ✗ | CRGB CRGB::lerp8(const CRGB &other, fract8 amountOf2) const { | |
| 73 | CRGB ret; | ||
| 74 | |||
| 75 | ✗ | ret.r = lerp8by8(r, other.r, amountOf2); | |
| 76 | ✗ | ret.g = lerp8by8(g, other.g, amountOf2); | |
| 77 | ✗ | ret.b = lerp8by8(b, other.b, amountOf2); | |
| 78 | |||
| 79 | ✗ | return ret; | |
| 80 | } | ||
| 81 | |||
| 82 | 19 | CRGB& CRGB::fadeToBlackBy (uint8_t fadefactor ) | |
| 83 | { | ||
| 84 | 19 | nscale8x3( r, g, b, 255 - fadefactor); | |
| 85 | 19 | return *this; | |
| 86 | } | ||
| 87 | |||
| 88 | |||
| 89 | FASTLED_NAMESPACE_END | ||
| 90 |