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
|
#ifndef _MOVIT_MULTIPLY_EFFECT_H
#define _MOVIT_MULTIPLY_EFFECT_H 1
// An effect that multiplies every pixel by a constant (separate for each of
// R, G, B, A). A common use would be to reduce the alpha of an overlay before
// sending it through OverlayEffect, e.g. with R=G=B=A=0.3 to get 30% alpha
// (remember, alpha is premultiplied).
#include <epoxy/gl.h>
#include <string>
#include "effect.h"
namespace movit {
class MultiplyEffect : public Effect {
public:
MultiplyEffect();
std::string effect_type_id() const override { return "MultiplyEffect"; }
std::string output_fragment_shader() override;
bool strong_one_to_one_sampling() const override { return true; }
private:
RGBATuple factor;
};
} // namespace movit
#endif // !defined(_MOVIT_MULTIPLY_EFFECT_H)
|
