// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use glib;
use glib::object::IsA;
use glib::translate::*;
use gst;
use gst_gl_sys;
use std::ptr;
use GLContext;
use GLSLProfile;
use GLSLVersion;

glib_wrapper! {
    /// `GLSLStage` holds and represents a single OpenGL shader stage.
    ///
    /// # Implements
    ///
    /// [`gst::ObjectExt`](../gst/trait.ObjectExt.html), [`glib::object::ObjectExt`](../glib/object/trait.ObjectExt.html)
    pub struct GLSLStage(Object<gst_gl_sys::GstGLSLStage, gst_gl_sys::GstGLSLStageClass, GLSLStageClass>) @extends gst::Object;

    match fn {
        get_type => || gst_gl_sys::gst_glsl_stage_get_type(),
    }
}

impl GLSLStage {
    /// ## `context`
    /// a `GLContext`
    /// ## `type_`
    /// the GL enum shader stage type
    ///
    /// # Returns
    ///
    /// a new `GLSLStage` of the specified `type_`
    pub fn new<P: IsA<GLContext>>(context: &P, type_: u32) -> GLSLStage {
        skip_assert_initialized!();
        unsafe {
            from_glib_none(gst_gl_sys::gst_glsl_stage_new(
                context.as_ref().to_glib_none().0,
                type_,
            ))
        }
    }

    pub fn new_default_fragment<P: IsA<GLContext>>(context: &P) -> GLSLStage {
        skip_assert_initialized!();
        unsafe {
            from_glib_none(gst_gl_sys::gst_glsl_stage_new_default_fragment(
                context.as_ref().to_glib_none().0,
            ))
        }
    }

    pub fn new_default_vertex<P: IsA<GLContext>>(context: &P) -> GLSLStage {
        skip_assert_initialized!();
        unsafe {
            from_glib_none(gst_gl_sys::gst_glsl_stage_new_default_vertex(
                context.as_ref().to_glib_none().0,
            ))
        }
    }

    /// ## `context`
    /// a `GLContext`
    /// ## `type_`
    /// the GL enum shader stage type
    /// ## `version`
    /// the `GLSLVersion`
    /// ## `profile`
    /// the `GLSLProfile`
    /// ## `str`
    /// a shader string
    ///
    /// # Returns
    ///
    /// a new `GLSLStage` of the specified `type_`
    pub fn new_with_string<P: IsA<GLContext>>(
        context: &P,
        type_: u32,
        version: GLSLVersion,
        profile: GLSLProfile,
        str: &str,
    ) -> GLSLStage {
        skip_assert_initialized!();
        unsafe {
            from_glib_none(gst_gl_sys::gst_glsl_stage_new_with_string(
                context.as_ref().to_glib_none().0,
                type_,
                version.to_glib(),
                profile.to_glib(),
                str.to_glib_none().0,
            ))
        }
    }

    /// ## `context`
    /// a `GLContext`
    /// ## `type_`
    /// the GL enum shader stage type
    /// ## `version`
    /// the `GLSLVersion`
    /// ## `profile`
    /// the `GLSLProfile`
    /// ## `n_strings`
    /// the number of strings in `str`
    /// ## `str`
    ///
    ///  an array of strings concatted together to produce a shader
    ///
    /// # Returns
    ///
    /// a new `GLSLStage` of the specified `type_`
    pub fn new_with_strings<P: IsA<GLContext>>(
        context: &P,
        type_: u32,
        version: GLSLVersion,
        profile: GLSLProfile,
        str: &[&str],
    ) -> GLSLStage {
        skip_assert_initialized!();
        let n_strings = str.len() as i32;
        unsafe {
            from_glib_none(gst_gl_sys::gst_glsl_stage_new_with_strings(
                context.as_ref().to_glib_none().0,
                type_,
                version.to_glib(),
                profile.to_glib(),
                n_strings,
                str.to_glib_none().0,
            ))
        }
    }

    ///
    /// # Returns
    ///
    /// whether the compilation suceeded
    pub fn compile(&self) -> Result<(), glib::Error> {
        unsafe {
            let mut error = ptr::null_mut();
            let _ = gst_gl_sys::gst_glsl_stage_compile(self.to_glib_none().0, &mut error);
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    ///
    /// # Returns
    ///
    /// The GL handle for this shader stage
    pub fn get_handle(&self) -> u32 {
        unsafe { gst_gl_sys::gst_glsl_stage_get_handle(self.to_glib_none().0) }
    }

    ///
    /// # Returns
    ///
    /// The GLSL profile for the current shader stage
    pub fn get_profile(&self) -> GLSLProfile {
        unsafe {
            from_glib(gst_gl_sys::gst_glsl_stage_get_profile(
                self.to_glib_none().0,
            ))
        }
    }

    ///
    /// # Returns
    ///
    /// The GL shader type for this shader stage
    pub fn get_shader_type(&self) -> u32 {
        unsafe { gst_gl_sys::gst_glsl_stage_get_shader_type(self.to_glib_none().0) }
    }

    ///
    /// # Returns
    ///
    /// The GLSL version for the current shader stage
    pub fn get_version(&self) -> GLSLVersion {
        unsafe {
            from_glib(gst_gl_sys::gst_glsl_stage_get_version(
                self.to_glib_none().0,
            ))
        }
    }

    /// Replaces the current shader string with `str`.
    /// ## `version`
    /// a `GLSLVersion`
    /// ## `profile`
    /// a `GLSLProfile`
    /// ## `n_strings`
    /// number of strings in `str`
    /// ## `str`
    /// a GLSL shader string
    pub fn set_strings(
        &self,
        version: GLSLVersion,
        profile: GLSLProfile,
        str: &[&str],
    ) -> Result<(), glib::error::BoolError> {
        let n_strings = str.len() as i32;
        unsafe {
            glib_result_from_gboolean!(
                gst_gl_sys::gst_glsl_stage_set_strings(
                    self.to_glib_none().0,
                    version.to_glib(),
                    profile.to_glib(),
                    n_strings,
                    str.to_glib_none().0
                ),
                "Failed to attach stage to set strings"
            )
        }
    }
}

unsafe impl Send for GLSLStage {}
unsafe impl Sync for GLSLStage {}