// 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 <GL/glew.h>
+#include <epoxy/gl.h>
#include <string>
#include "effect.h"
class SliceEffect : public Effect {
public:
SliceEffect();
- virtual std::string effect_type_id() const { return "SliceEffect"; }
- std::string output_fragment_shader();
- virtual bool needs_texture_bounce() const { return true; }
- virtual bool changes_output_size() const { return true; }
- 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;
-
- void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
+ std::string effect_type_id() const override { return "SliceEffect"; }
+ std::string output_fragment_shader() override;
+ bool needs_texture_bounce() const override { return true; }
+ bool changes_output_size() const override { return true; }
+ bool sets_virtual_output_size() const override { return false; }
+ void inform_input_size(unsigned input_num, unsigned width, unsigned height) override;
+ void get_output_size(unsigned *width, unsigned *height,
+ unsigned *virtual_width, unsigned *virtual_height) const override;
+
+ void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) override;
+ void inform_added(EffectChain *chain) override { this->chain = chain; }
enum Direction { HORIZONTAL = 0, VERTICAL = 1 };
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