#version 300 es
precision highp float;                 // highp: exact UV into the 2048 glyph atlas (mediump fp16 rounds on mobile/WASM)
in vec2 vTexCoord;
in vec4 vColor;
uniform mediump sampler2D u_tex;       // R8 glyph coverage (anti-aliased alpha) — NORMAL (non-SDF) text
out vec4 fragColor;
void main()
{
    float coverage = texture( u_tex, vTexCoord ).r;
    fragColor = vec4( vColor.rgb, vColor.a * coverage );
}