func ShaderSource(shader uint32, src string) {
//var srcArray []uint8 = StringToArray(src)
//var ptr *uint8 = &srcArray[0]
src += "\x00"
csources, free := gl.Strs(src)
gl.ShaderSource(shader, 1, csources, nil)
free()
}
func NewShader(src string, sType uint32) (*Shader, error) {
handle := gl.CreateShader(sType)
glSrcs, freeFn := gl.Strs(src + "\x00")
gl.ShaderSource(handle, 1, glSrcs, nil)
freeFn()
gl.CompileShader(handle)
err := getGlError(handle, gl.COMPILE_STATUS, gl.GetShaderiv, gl.GetShaderInfoLog,
"SHADER::COMPILE_FAILURE::")
if err != nil {
return nil, err
}
return &Shader{handle: handle}, nil
}
func compileShader(source string, shaderType uint32) (uint32, error) {
shader := gl.CreateShader(shaderType)
csources, free := gl.Strs(source)
gl.ShaderSource(shader, 1, csources, nil)
free()
gl.CompileShader(shader)
var status int32
gl.GetShaderiv(shader, gl.COMPILE_STATUS, &status)
if status == gl.FALSE {
var logLength int32
gl.GetShaderiv(shader, gl.INFO_LOG_LENGTH, &logLength)
log := strings.Repeat("\x00", int(logLength+1))
gl.GetShaderInfoLog(shader, logLength, nil, gl.Str(log))
return 0, fmt.Errorf("failed to compile %v: %v", source, log)
}
return shader, nil
}
// Converts a Go string to a uint8 array for use with OpenGL.
// Returns a pointer to the char array and a function to free the memory associated with the array
func GLString(str string) (**uint8, func()) {
if !strings.HasSuffix(str, "\x00") {
str += "\x00"
}
return gl.Strs(str)
}