X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=overlay_effect.h;h=40a6fff99e2a465f71cff654d8ae675495c08685;hp=4c6d37a4fea6d9a95715031426eb7332fcf73346;hb=f216b7bef5a968c89f6fc78e83cc26a91e504a8a;hpb=7af4d1b54ba141fdb74cd13ddc6110708855d157

diff --git a/overlay_effect.h b/overlay_effect.h
index 4c6d37a..40a6fff 100644
--- a/overlay_effect.h
+++ b/overlay_effect.h
@@ -1,5 +1,5 @@
-#ifndef _OVERLAY_EFFECT_H
-#define _OVERLAY_EFFECT_H 1
+#ifndef _MOVIT_OVERLAY_EFFECT_H
+#define _MOVIT_OVERLAY_EFFECT_H 1
 
 // Put one image on top of another, using alpha where appropriate.
 // (If both images are the same aspect and the top image has alpha=1.0
@@ -10,8 +10,12 @@
 //
 // The first input is the bottom, and the second is the top.
 
+#include <string>
+
 #include "effect.h"
 
+namespace movit {
+
 class OverlayEffect : public Effect {
 public:
 	OverlayEffect();
@@ -20,6 +24,7 @@ public:
 
 	virtual bool needs_srgb_primaries() const { return false; }
 	virtual unsigned num_inputs() const { return 2; }
+	virtual bool one_to_one_sampling() const { return true; }
 
 	// Actually, if _either_ image has blank alpha, our output will have
 	// blank alpha, too (this only tells the framework that having _both_
@@ -27,6 +32,13 @@ public:
 	// 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; }
+
+private:
+	// If true, overlays input1 on top of input2 instead of vice versa.
+	// Must be set before finalize.
+	bool swap_inputs;
 };
 
-#endif // !defined(_OVERLAY_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_OVERLAY_EFFECT_H)