glsl is a QuasiQuoter which produces GLSL source code with #line
directives inserted so that error locations point to the correct location in
the Haskell source file. It also permits basic string interpolation.
Interpolated variables are prefixed with
$They can optionally be surrounded with braces like
${foo}Interpolated variables are converted to strings with show
To escape a
$use\$
It is intended to be used in concert with compileShaderQ like so
myConstant = 3.141 -- Note that this will have to be in a different module
myFragmentShader = $(compileShaderQ Nothing "frag" Nothing [glsl|
#version 450
const float myConstant = ${myConstant};
main (){
}
|])
An explicit example (interactive is from doctest):
let version = 450 :: Int in [glsl|#version $version|]"#version 450\n#extension GL_GOOGLE_cpp_style_line_directive : enable\n#line ... \"<interactive>\"\n"
Note that line number will be thrown off if any of the interpolated variables contain newlines.