cube-game-plus-plus/resources/shader/fontTest.fs

#version 430

layout(binding = 0) uniform sampler2D samp;

in vec4 varColor;
in vec2 varTex;

out vec4 outColor;

void main(void) {
    outColor = vec4(varColor.xyz, varColor.w * texture(samp, varTex).x);
}