func ShaderSource(name string, shader gl.Uint, source string, defines map[string]interface{}, logPrint bool) {
var src []*gl.Char
var i, l = 1, len(defines)
var lines = make([]string, (l*5)+3)
var joined string
lines[0] = "#version 420 core\n"
for dk, dv := range defines {
lines[i+0] = "#define "
lines[i+1] = dk
lines[i+2] = " "
lines[i+3] = fmt.Sprintf("%v", dv)
lines[i+4] = "\n"
i = i + 5
}
lines[i] = "#line 1\n"
lines[i+1] = source
joined = strings.Join(lines, "")
src = gl.GLStringArray(lines...)
defer gl.GLStringArrayFree(src)
gl.ShaderSource(shader, gl.Sizei(len(src)), &src[0], nil)
PanicIfErrors("ShaderSource(name=%v source=%v)", name, joined)
if logPrint {
log.Printf("\n\n------------------------------\n%s\n\n", joined)
}
}
func glSetShaderSource(shader gl.Uint, source string) {
var src = gl.GLStringArray(source)
defer gl.GLStringArrayFree(src)
gl.ShaderSource(shader, gl.Sizei(len(src)), &src[0], nil)
}