Text: alpha blending of the fonts is not applied correctly in shader

[hordurj]

The glyph texture uses the alpha channel to anti-alias fonts. This information is not correctly used in the text shader.

return vec4<f32>(color.rgb * c.a, color.a);

where c.a is the font texture.

this will make the color darker which will only work on a black background. Instead, the following should be used:

return vec4<f32>(color.rgb, c.a);

This will properly blend the font with the background. If the alpha channel in the color should be used to make transparent text, then

return vec4<f32>(color.rgb, color.a * c.a);

could be used.

Example:

Before:

After: