X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=overlay_effect.h;h=29c09416ddea3f79aaf3ee733870ff66468f0b1f;hp=489d8d78168c449ccf8bf6e35c86182732f1a04f;hb=12a1f8177c22386171ded47947b9422f27f5f1b2;hpb=cfc161e0289c2169d4835c48751ff56b97355eb2

diff --git a/overlay_effect.h b/overlay_effect.h
index 489d8d7..29c0941 100644
--- a/overlay_effect.h
+++ b/overlay_effect.h
@@ -19,18 +19,24 @@ namespace movit {
 class OverlayEffect : public Effect {
 public:
 	OverlayEffect();
-	virtual std::string effect_type_id() const { return "OverlayEffect"; }
-	std::string output_fragment_shader();
+	std::string effect_type_id() const override { return "OverlayEffect"; }
+	std::string output_fragment_shader() override;
 
-	virtual bool needs_srgb_primaries() const { return false; }
-	virtual unsigned num_inputs() const { return 2; }
+	bool needs_srgb_primaries() const override { return false; }
+	unsigned num_inputs() const override { return 2; }
+	bool strong_one_to_one_sampling() const override { return true; }
 
 	// Actually, if _either_ image has blank alpha, our output will have
 	// blank alpha, too (this only tells the framework that having _both_
 	// images with blank alpha would result in blank alpha).
 	// However, understanding that would require changes
 	// to EffectChain, so postpone that optimization for later.
-	virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
+	AlphaHandling alpha_handling() const override { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
+
+private:
+	// If true, overlays input1 on top of input2 instead of vice versa.
+	// Must be set before finalize.
+	bool swap_inputs;
 };
 
 }  // namespace movit