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Reduce RAM usage by optimizing Color constant storage (#9339)

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J. Nick Koston 2025-07-05 22:30:18 -05:00 committed by GitHub
parent f7019a4ed7
commit 20ba035e3b
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GPG Key ID: B5690EEEBB952194
2 changed files with 19 additions and 21 deletions
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8
esphome/core/color.cpp
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@ -2,10 +2,8 @@
namespace esphome {
const Color Color::BLACK(0, 0, 0, 0);
const Color Color::WHITE(255, 255, 255, 255);
const Color COLOR_BLACK(0, 0, 0, 0);
const Color COLOR_WHITE(255, 255, 255, 255);
// C++20 constinit ensures compile-time initialization (stored in ROM)
constinit const Color Color::BLACK(0, 0, 0, 0);
constinit const Color Color::WHITE(255, 255, 255, 255);
} // namespace esphome

32
esphome/core/color.h
View File

@ -5,7 +5,9 @@
namespace esphome {
inline static uint8_t esp_scale8(uint8_t i, uint8_t scale) { return (uint16_t(i) * (1 + uint16_t(scale))) / 256; }
inline static constexpr uint8_t esp_scale8(uint8_t i, uint8_t scale) {
return (uint16_t(i) * (1 + uint16_t(scale))) / 256;
}
struct Color {
union {
@ -31,17 +33,20 @@ struct Color {
uint32_t raw_32;
};
inline Color() ESPHOME_ALWAYS_INLINE : r(0), g(0), b(0), w(0) {} // NOLINT
inline Color(uint8_t red, uint8_t green, uint8_t blue) ESPHOME_ALWAYS_INLINE : r(red), g(green), b(blue), w(0) {}
inline constexpr Color() ESPHOME_ALWAYS_INLINE : raw_32(0) {} // NOLINT
inline constexpr Color(uint8_t red, uint8_t green, uint8_t blue) ESPHOME_ALWAYS_INLINE : r(red),
g(green),
b(blue),
w(0) {}
inline Color(uint8_t red, uint8_t green, uint8_t blue, uint8_t white) ESPHOME_ALWAYS_INLINE : r(red),
g(green),
b(blue),
w(white) {}
inline explicit Color(uint32_t colorcode) ESPHOME_ALWAYS_INLINE : r((colorcode >> 16) & 0xFF),
g((colorcode >> 8) & 0xFF),
b((colorcode >> 0) & 0xFF),
w((colorcode >> 24) & 0xFF) {}
inline constexpr Color(uint8_t red, uint8_t green, uint8_t blue, uint8_t white) ESPHOME_ALWAYS_INLINE : r(red),
g(green),
b(blue),
w(white) {}
inline explicit constexpr Color(uint32_t colorcode) ESPHOME_ALWAYS_INLINE : r((colorcode >> 16) & 0xFF),
g((colorcode >> 8) & 0xFF),
b((colorcode >> 0) & 0xFF),
w((colorcode >> 24) & 0xFF) {}
inline bool is_on() ESPHOME_ALWAYS_INLINE { return this->raw_32 != 0; }
@ -169,9 +174,4 @@ struct Color {
static const Color WHITE;
};
ESPDEPRECATED("Use Color::BLACK instead of COLOR_BLACK", "v1.21")
extern const Color COLOR_BLACK;
ESPDEPRECATED("Use Color::WHITE instead of COLOR_WHITE", "v1.21")
extern const Color COLOR_WHITE;
} // namespace esphome