#ifndef SHADER_H
#define SHADER_H
#include <string_view>
constexpr std::string_view vSource = R"(
    #version 330 core

    layout (location = 0) in vec3 aPos;
    layout (location = 1) in vec2 aTexCoord;

    out vec2 TexCoord;

    void main()
    {
        gl_Position = vec4(aPos, 1.0);
        TexCoord = vec2(aTexCoord.x, aTexCoord.y);
    }
)";
constexpr std::string_view fSource = R"(
    #version 330 core

    out vec4 FragColor;

    in vec2 TexCoord;

    uniform sampler2D textureY;
    uniform sampler2D textureU;
    uniform sampler2D textureV;

    void main(){
        vec3 yuv, rgb;
        vec3 yuv2r = vec3(1.164, 0.0, 1.596);
        vec3 yuv2g = vec3(1.164, -0.391, -0.813);
        vec3 yuv2b = vec3(1.164, 2.018, 0.0);
        yuv.x = texture(textureY, TexCoord).r - 0.0625;
        yuv.y = texture(textureU, TexCoord).r - 0.5;
        yuv.z = texture(textureV, TexCoord).r - 0.5;

        rgb.x = dot(yuv, yuv2r);
        rgb.y = dot(yuv, yuv2g);
        rgb.z = dot(yuv, yuv2b);

        FragColor = vec4(rgb, 1.0);
    }
)";

#endif