#version 150

uniform sampler2DRect tex0;

in vec2 tex_c;

out vec4 outputColor;

void main()
{
    // Convert normalized coordinates to pixel coordinates
    vec2 texCoord = tex_c * vec2(1920.0/2.0, 960.0);
    vec4 texColor = texture(tex0, texCoord);
    
    if (texColor.a < 0.1) {
        discard;
    }
    vec3 color = texColor.rgb;
    color = vec3(dot(color, vec3(0.299, 0.587, 0.114)));
    outputColor = vec4(color, texColor.a);
    // vec4 texColor = texture(tex0, tex_c);    
    

    //Discard fragments with alpha below a threshold
    // if (texColor.a < 0.1) {
    //     discard;
    // }

    // vec3 color = texColor.rgb;
    // color = vec3(dot(color, vec3(0.299, 0.587, 0.114)));
    
    // outputColor = vec4(color, texColor.a);
}