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libraries/FastLED/tests/test_videofx_wrapper.cpp

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+
+
+#include "test.h"
+
+#include "fx/fx.h"
+#include "fx/fx2d.h"
+#include "fx/video.h"
+#include "fl/vector.h"
+#include "FastLED.h"
+
+
+FASTLED_SMART_PTR(Fake2d);
+
+// Simple Fx2d object which writes a single red pixel to the first LED
+// with the red component being the intensity of the frame counter.
+class Fake2d : public Fx2d {
+  public:
+    Fake2d() : Fx2d(XYMap::constructRectangularGrid(1,1)) {}
+
+    void draw(DrawContext context) override {
+        CRGB c = mColors[mFrameCounter % mColors.size()];
+        context.leds[0] = c;
+        mFrameCounter++;
+    }
+
+    bool hasFixedFrameRate(float *fps) const override {
+        *fps = 1;
+        return true;
+    }
+
+    Str fxName() const override { return "Fake2d"; }
+    uint8_t mFrameCounter = 0;
+    FixedVector<CRGB, 5> mColors;
+};
+
+
+
+TEST_CASE("test_fixed_fps") {
+    Fake2dPtr fake = Fake2dPtr::New();
+    fake->mColors.push_back(CRGB(0, 0, 0));
+    fake->mColors.push_back(CRGB(255, 0, 0));
+    VideoFxWrapper wrapper(fake);
+    wrapper.setFade(0, 0);
+    CRGB leds[1];
+    Fx::DrawContext context(0, leds);
+    wrapper.draw(context);
+    CHECK_EQ(1, fake->mFrameCounter);
+    CHECK_EQ(leds[0], CRGB(0, 0, 0));
+    context.now = 500;
+    wrapper.draw(context);
+    CHECK_EQ(2, fake->mFrameCounter);
+    CHECK_EQ(leds[0], CRGB(127, 0, 0));
+}