/usr/include/movit/diffusion_effect.h is in libmovit-dev 1.3.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | #ifndef _MOVIT_DIFFUSION_EFFECT_H
#define _MOVIT_DIFFUSION_EFFECT_H 1
// There are many different effects that go under the name of "diffusion",
// seemingly all of the inspired by the effect you get when you put a
// diffusion filter in front of your camera lens. The effect most people
// want is a general flattening/smoothing of the light, and reduction of
// fine detail (most notably, blemishes in people's skin), without ruining
// edges, which a regular blur would do.
//
// We do a relatively simple version, sometimes known as "white diffusion",
// where we first blur the picture, and then overlay it on the original
// using the original as a matte.
#include <epoxy/gl.h>
#include <assert.h>
#include <string>
#include "effect.h"
namespace movit {
class BlurEffect;
class EffectChain;
class Node;
class OverlayMatteEffect;
class DiffusionEffect : public Effect {
public:
DiffusionEffect();
~DiffusionEffect();
virtual std::string effect_type_id() const { return "DiffusionEffect"; }
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;
OverlayMatteEffect *overlay_matte;
bool owns_overlay_matte;
};
// Used internally by DiffusionEffect; combines the blurred and the original
// version using the original as a matte.
class OverlayMatteEffect : public Effect {
public:
OverlayMatteEffect();
virtual std::string effect_type_id() const { return "OverlayMatteEffect"; }
std::string output_fragment_shader();
virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
unsigned num_inputs() const { return 2; }
virtual bool one_to_one_sampling() const { return true; }
private:
float blurred_mix_amount;
};
} // namespace movit
#endif // !defined(_MOVIT_DIFFUSION_EFFECT_H)
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