X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=slice_effect.h;h=ef96dddcb1e8474a07f037862fd37afe4a41951a;hp=1c363ea7b104c19ccd31a6e82a74b50f95ec16c1;hb=8e9f58fec54a4c879035b214fd7411f6ff7b3a32;hpb=15daf781e6ce00ec37ca806a16e490d59dcb4e24

diff --git a/slice_effect.h b/slice_effect.h
index 1c363ea..ef96ddd 100644
--- a/slice_effect.h
+++ b/slice_effect.h
@@ -7,8 +7,8 @@
 // discard roles, where one does convolutions by means of many small FFTs, but
 // could also work as a (relatively boring) video effect on its own.
 //
-// Note that vertical slices happen from the bottom, not the top, due to the
-// OpenGL coordinate system.
+// Note that vertical slices happen from the top, consistent with the rest of
+// Movit.
 
 #include <epoxy/gl.h>
 #include <string>
@@ -24,6 +24,7 @@ public:
 	std::string output_fragment_shader();
 	virtual bool needs_texture_bounce() const { return true; }
 	virtual bool changes_output_size() const { return true; }
+	virtual bool sets_virtual_output_size() const { return false; }
 	virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height);
 	virtual void get_output_size(unsigned *width, unsigned *height,
 	                             unsigned *virtual_width, unsigned *virtual_height) const;
@@ -37,7 +38,11 @@ private:
 	EffectChain *chain;
 	int input_width, input_height;
 	int input_slice_size, output_slice_size;
+	int offset;
 	Direction direction;
+
+	float uniform_output_coord_to_slice_num, uniform_slice_num_to_input_coord;
+	float uniform_slice_offset_to_input_coord, uniform_offset;
 };
 
 }  // namespace movit