#ifdef __cplusplus
#include <string>
std::string shader_test_frag = R"("
#version 300 es
precision mediump float;

out vec4 FragColor;
in vec2 uv;
in vec2 pos;

uniform sampler2D tex;

vec4 linear_iter(vec4 i, vec4 p, float factor){
    return (i + p) * factor;
}

void main() {
    //FragColor = vec4(pos, 0.0, 1.0f);
    FragColor = linear_iter(texture(tex, uv), vec4(pos, 0.0, 1.0), (uv.x + uv.y + 1.0) / 3.0);
}

")";
#endif