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[light] Keep the effect list in a flash table (#20204)

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Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>
This commit is contained in:
J. Nick Koston
2026-10-09 15:55:09 -10:00
committed by GitHub
co-authored by pre-commit-ci-lite[bot]
parent 6b03d68fac
commit 41cc96bbb8
19 changed files with 207 additions and 80 deletions
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tests/components/light/test_light_state.cpp
-29
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@@ -1,6 +1,5 @@
#include <gtest/gtest.h>
#include "esphome/components/light/light_effect.h"
#include "esphome/components/light/light_output.h"
#include "esphome/components/light/light_state.h"
@@ -18,36 +17,8 @@ class BrightnessOutput : public LightOutput {
void write_state(LightState *state) override {}
};
class NoopEffect : public LightEffect {
public:
using LightEffect::LightEffect;
void apply() override {}
};
// start_effect_() is where the uint32_t index is narrowed to the stored uint16_t.
class TestableLightState : public LightState {
public:
using LightState::LightState;
using LightState::start_effect_;
};
} // namespace
// add_effects() is public, so an external component can exceed the codegen cap on effect count;
// an index the uint16_t can't hold must be ignored rather than wrap onto another effect.
TEST(LightStateEffect, IndexAboveUint16IsIgnoredAndKeepsTheActiveEffect) {
BrightnessOutput output;
TestableLightState state(&output);
NoopEffect effect("Noop");
state.add_effects({&effect});
state.start_effect_(1);
ASSERT_EQ(state.get_current_effect_index(), 1u);
state.start_effect_(0x10000u); // unchecked narrowing wraps this to 0, which stops the effect
EXPECT_EQ(state.get_current_effect_index(), 1u);
}
// get_gamma_correct() reads the gamma codegen stores after the lookup table, rounded to two decimals.
TEST(LightStateGamma, ReadsTheGammaStoredWithTheTable) {
static constexpr GammaTable TABLE{{}, 280};