X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=effect.h;h=fcb752638115dd6297bccb918cd606dd3b535645;hp=4191d4ddfb6714ec284719acae8c0e4b0f89b4bf;hb=b0f2d8f7604bfb4c8a9824a3a022d32ef26e12cc;hpb=f23c7768e6c13d6a719aaea89074d86b74148aeb

diff --git a/effect.h b/effect.h
index 4191d4d..fcb7526 100644
--- a/effect.h
+++ b/effect.h
@@ -16,6 +16,8 @@
 
 #include <GL/gl.h>
 
+class EffectChain;
+
 // Can alias on a float[2].
 struct Point2D {
 	Point2D(float x, float y)
@@ -92,13 +94,16 @@ public:
 	// needs mipmaps, you will also get them).
 	virtual bool needs_mipmaps() const { return false; }
 
+	// How many inputs this effect will take (a fixed number).
+	// If you have only one input, it will be called INPUT() in GLSL;
+	// if you have several, they will be INPUT1(), INPUT2(), and so on.
+	virtual unsigned num_inputs() const { return 1; }
+
 	// Requests that this effect adds itself to the given effect chain.
 	// For most effects, the default will be fine, but for effects that
 	// consist of multiple passes, it is often useful to replace this
 	// with something that adds completely different things to the chain.
-	virtual void add_self_to_effect_chain(std::vector<Effect *> *chain) {
-		chain->push_back(this);
-	}
+	virtual void add_self_to_effect_chain(EffectChain *graph, const std::vector<Effect *> &inputs);
 
 	// Outputs one GLSL uniform declaration for each registered parameter
 	// (see below), with the right prefix prepended to each uniform name.