X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=effect.h;h=f1520b797f9f658a3218838b379fd5c9b281ed8c;hp=a9734ccf37c1bb811b8175f46452265ee86c7a1d;hb=f99ad333a7acbb6c8c995dbb036484ae8940c490;hpb=ab636361e865c389fe60584562372ec39ac4c511

diff --git a/effect.h b/effect.h
index a9734cc..f1520b7 100644
--- a/effect.h
+++ b/effect.h
@@ -14,6 +14,8 @@
 #include <string>
 #include <vector>
 
+#include <assert.h>
+
 #include "opengl.h"
 
 class EffectChain;
@@ -44,7 +46,12 @@ void set_uniform_vec3(GLuint glsl_program_num, const std::string &prefix, const
 void set_uniform_vec4_array(GLuint glsl_program_num, const std::string &prefix, const std::string &key, const float *values, size_t num_values);
 
 class Effect {
-public: 
+public:
+	// An identifier for this type of effect, mostly used for debug output
+	// (but some special names, like "ColorSpaceConversionEffect", holds special
+	// meaning). Same as the class name is fine.
+	virtual std::string effect_type_id() const = 0;
+
 	// Whether this effects expects its input (and output) to be in
 	// linear gamma, ie. without an applied gamma curve. Most effects
 	// will want this, although the ones that never actually look at
@@ -96,6 +103,21 @@ public:
 	// needs mipmaps, you will also get them).
 	virtual bool needs_mipmaps() const { return false; }
 
+	// Whether this effect wants to output to a different size than
+	// its input(s). If you set this to true, the output will be
+	// bounced to a texture (similarly to if the next effect set
+	// needs_texture_bounce()).
+	virtual bool changes_output_size() const { return false; }
+
+	// If changes_output_size() is true, you must implement this to tell
+	// the framework what output size you want.
+	//
+	// Note that it is explicitly allowed to change width and height
+	// from frame to frame; EffectChain will reallocate textures as needed.
+	virtual void get_output_size(unsigned *width, unsigned *height) const {
+		assert(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.