/usr/include/movit/unsharp_mask_effect.h is in libmovit-dev 1.3.1-1.
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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 42 43 44 45 46 47 48 49 50 | #ifndef _MOVIT_UNSHARP_MASK_EFFECT_H
#define _MOVIT_UNSHARP_MASK_EFFECT_H 1
// Unsharp mask is probably the most popular way of doing sharpening today,
// although it does not always deliver the best results (it is very prone
// to haloing). It simply consists of removing a blurred copy of the image from
// itself (multiplied by some strength factor). In this aspect, it's similar to
// glow, except by subtracting instead of adding.
//
// See DeconvolutionSharpenEffect for a different, possibly better
// sharpening algorithm.
#include <epoxy/gl.h>
#include <assert.h>
#include <string>
#include "effect.h"
namespace movit {
class BlurEffect;
class EffectChain;
class MixEffect;
class Node;
class UnsharpMaskEffect : public Effect {
public:
UnsharpMaskEffect();
virtual std::string effect_type_id() const { return "UnsharpMaskEffect"; }
virtual bool needs_srgb_primaries() const { return false; }
virtual void rewrite_graph(EffectChain *graph, Node *self);
virtual bool set_float(const std::string &key, float value);
virtual std::string output_fragment_shader() {
assert(false);
}
virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) {
assert(false);
}
private:
BlurEffect *blur;
MixEffect *mix;
};
} // namespace movit
#endif // !defined(_MOVIT_UNSHARP_MASK_EFFECT_H)
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