Biblioteka C++ do edycji zdjęć

uniform sampler2D m_Texture;
uniform float m_DestPixelMult;
varying vec2 texCoord;

void main() {
    vec4 originalPixel = texture2D( m_Texture, texCoord ) * vec4( 1.0 -
    m_DestPixelMult );
    vec4 newPixel = vec4( 0.0 );
    if( m_DestPixelMult != 0.0 ) {
        newPixel = texture2D( m_Texture, texCoord ) * vec4( 0.3, 0.59,
        0.11, 1.0 ) * vec4( m_DestPixelMult );
        float newPixelVal = newPixel.x + newPixel.y + newPixel.z;
        newPixel = vec4( newPixelVal, newPixelVal, newPixelVal, 1.0 );
    }
   
    gl_FragColor = originalPixel + newPixel;
}