initial commit

libraries/FastLED/src/fl/downscale.h

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+
+#pragma once
+
+/*
+Experimental bilinearn downscaling algorithm. Not tested yet and completely
+"vibe-coded" by ai.
+
+If you use this and find an issue then please report it.
+*/
+
+#include "fl/int.h"
+#include "crgb.h"
+
+namespace fl {
+
+class XYMap;
+
+void downscale(const CRGB *src, const XYMap &srcXY, CRGB *dst,
+               const XYMap &dstXY);
+
+// Optimized versions for downscaling by 50%. This is here for testing purposes
+// mostly. You should prefer to use downscale(...) instead of calling these
+// functions. It's important to note that downscale(...) will invoke
+// downscaleHalf(...) automatically when the source and destination are half the
+// size of each other.
+void downscaleHalf(const CRGB *src, fl::u16 srcWidth, fl::u16 srcHeight,
+                   CRGB *dst);
+void downscaleHalf(const CRGB *src, const XYMap &srcXY, CRGB *dst,
+                   const XYMap &dstXY);
+void downscaleArbitrary(const CRGB *src, const XYMap &srcXY, CRGB *dst,
+                        const XYMap &dstXY);
+
+} // namespace fl