prosperon/source/shaders/text.sglsl

@vs vs
in vec2 vert;
in vec2 pos;
in vec2 wh;
in vec2 uv;
in vec2 st;
in vec4 vColor;

out vec2 TexCoords;
out vec4 fColor;

uniform vs_params { mat4 projection; };

void main()
{
    gl_Position = projection * vec4(pos + (vert * wh), 0.0, 1.0);
    
    TexCoords = uv + vec2(vert.x*st.x, st.y - vert.y*st.y);
    
    fColor = vColor;
}
@end

@fs fs
in vec2 TexCoords;
in vec4 fColor;

out vec4 color;

uniform texture2D text;
uniform sampler smp;

void main()
{
  float lettera = texture(sampler2D(text,smp),TexCoords).r;
  if (lettera < 0.1f) discard;
  color = fColor;
}
@end

@program text vs fs