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#version 410 core
uniform sampler2D tex;
uniform vec4 elemColor;
uniform vec4 texWeight;
uniform mat2 texCoorMat;
in vec2 vTexCoord;
in vec4 vFontColor;
out vec4 fFragColor;
const float N = 1.0 / 255.0;
void main()
{
// background image or font alpha-mask
vec4 texel = texture(tex, texCoorMat * vTexCoord);
vec4 aguiColor = mix(vec4(1.0), texel, texWeight) * elemColor;
vec4 fontColor = (vFontColor * N) * vec4(1.0, 1.0, 1.0, texel.r);
// texWeight.x is -1 when drawing fonts
fFragColor = mix(aguiColor, fontColor, float(texWeight.x == -1.0));
}
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