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Remove gamma value lower limit to enable inverse gamma correction #5187

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Merged
DedeHai merged 5 commits into from
Feb 8, 2026
+7 −7
Merged

Remove gamma value lower limit to enable inverse gamma correction #5187

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eeb5144
Enable inverse gamma correction (gamma < 1.0)
Dec 12, 2025
9d55b18
Enable inverse gamma correction (gamma < 1.0)
Dec 12, 2025
db014c3
Merge branch 'gamma-inverse-support' of https://github.com/flo269/WLE…
DedeHai Feb 8, 2026
c5ec522
Merge branch 'main' into pr/5187
DedeHai Feb 8, 2026
6b15f92
adjust placeholder value to new default
DedeHai Feb 8, 2026
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10 changes: 5 additions & 5 deletions wled00/cfg.cpp
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Expand Up @@ -520,11 +520,11 @@ bool deserializeConfig(JsonObject doc, bool fromFS) {
CJSON(gammaCorrectVal, light["gc"]["val"]); // default 2.2
float light_gc_bri = light["gc"]["bri"] | 1.0f; // default to 1.0 (false)
float light_gc_col = light["gc"]["col"] | gammaCorrectVal; // default to gammaCorrectVal (true)
if (light_gc_bri > 1.0f) gammaCorrectBri = true;
else gammaCorrectBri = false;
if (light_gc_col > 1.0f) gammaCorrectCol = true;
else gammaCorrectCol = false;
if (gammaCorrectVal <= 1.0f || gammaCorrectVal > 3) {
if (light_gc_bri != 1.0f) gammaCorrectBri = true;
else gammaCorrectBri = false;
if (light_gc_col != 1.0f) gammaCorrectCol = true;
else gammaCorrectCol = false;
if (gammaCorrectVal < 0.1f || gammaCorrectVal > 3) {
gammaCorrectVal = 1.0f; // no gamma correction
gammaCorrectBri = false;
gammaCorrectCol = false;
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2 changes: 1 addition & 1 deletion wled00/data/settings_leds.htm
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Expand Up @@ -958,7 +958,7 @@ <h3>Defaults</h3>
Apply preset <input name="BP" type="number" class="m" min="0" max="250" required> at boot (0 uses values from above)<br><br>
Use Gamma correction for color: <input type="checkbox" name="GC"> (strongly recommended)<br>
Use Gamma correction for brightness: <input type="checkbox" name="GB"> (not recommended)<br>
Use Gamma value: <input name="GV" type="number" class="m" placeholder="2.8" min="1" max="3" step="0.1" required><br><br>
Use Gamma value: <input name="GV" type="number" class="m" placeholder="2.2" min="0.1" max="3" step="0.1" required><br><br>
Brightness factor: <input name="BF" type="number" class="m" min="1" max="255" required> %
<h3>Transitions</h3>
Default transition time: <input name="TD" type="number" class="xl" min="0" max="65500"> ms<br>
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2 changes: 1 addition & 1 deletion wled00/set.cpp
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Expand Up @@ -378,7 +378,7 @@ void handleSettingsSet(AsyncWebServerRequest *request, byte subPage)
gammaCorrectBri = request->hasArg(F("GB"));
gammaCorrectCol = request->hasArg(F("GC"));
gammaCorrectVal = request->arg(F("GV")).toFloat();
if (gammaCorrectVal <= 1.0f || gammaCorrectVal > 3) {
if (gammaCorrectVal < 0.1f || gammaCorrectVal > 3) {
gammaCorrectVal = 1.0f; // no gamma correction
gammaCorrectBri = false;
gammaCorrectCol = false;
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