/usr/include/movit/luma_mix_effect.h is in libmovit-dev 1.4.0-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | #ifndef _MOVIT_LUMA_MIX_EFFECT_H
#define _MOVIT_LUMA_MIX_EFFECT_H 1
// Fade between two images based on a third monochrome one; lighter pixels
// will be faded before darker pixels (unless the inverse flag is set,
// in which case darker pixels will be faded before lighter pixels).
// This allows a wide range of different video wipes implemented using
// a single effect.
//
// Note that despite the name, the third input's _red_ channel is what's used
// for transitions; there is no luma calculation done. If you need that,
// put a SaturationEffect in front to desaturate (which calculates luma).
#include <string>
#include "effect.h"
namespace movit {
class LumaMixEffect : public Effect {
public:
LumaMixEffect();
virtual std::string effect_type_id() const { return "LumaMixEffect"; }
std::string output_fragment_shader();
virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
virtual bool needs_srgb_primaries() const { return false; }
virtual unsigned num_inputs() const { return 3; }
virtual bool one_to_one_sampling() const { return true; }
virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
private:
float transition_width, progress;
int inverse; // 0 or 1.
bool uniform_inverse;
float uniform_progress_mul_w_plus_one;
};
} // namespace movit
#endif // !defined(_MOVIT_MIX_EFFECT_H)
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