// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// from gst-gir-files (https://gitlab.freedesktop.org/gstreamer/gir-files-rs.git)
// DO NOT EDIT

use crate::{GLDisplay, GLPlatform, GLSLProfile, GLSLVersion, GLWindow, GLAPI};
use glib::{prelude::*, translate::*};

glib::wrapper! {
    /// [`GLContext`][crate::GLContext] wraps an OpenGL context object in a uniform API. As a result
    /// of the limitation on OpenGL context, this object is not thread safe unless
    /// specified and must only be activated in a single thread.
    ///
    /// Environment variables:
    /// - `GST_GL_API`: select which OpenGL API to create and OpenGL context for.
    ///  Depending on the platform, the available values are
    ///  'opengl', 'opengl3' (core profile), and 'gles2'. See the
    ///  the [`GLAPI`][crate::GLAPI] enumeration for more details.
    /// - `GST_GL_PLATFORM`: select which OpenGL platform to create an OpenGL
    ///  context with. Depending on the platform and the
    ///  dependencies available build-time, the available values
    ///  are, 'glx', 'egl', 'cgl', 'wgl', and 'eagl'
    /// - `GST_GL_CONFIG`: select the configuration used for creating the OpenGL
    ///  context and OpenGL surface. Written out as a GstStructure
    ///  that has been serialized to string. e.g.
    ///  `GST_GL_CONFIG="gst-gl-context-config,red-size=8,green-size=8,blue-size=8,alpha-size=8,depth-size=16"`.
    ///  Not all platforms will support the same level of
    ///  functionality.
    ///
    /// This is an Abstract Base Class, you cannot instantiate it.
    ///
    /// # Implements
    ///
    /// [`GLContextExt`][trait@crate::prelude::GLContextExt], [`trait@gst::prelude::ObjectExt`], [`trait@glib::ObjectExt`], [`GLContextExtManual`][trait@crate::prelude::GLContextExtManual]
    #[doc(alias = "GstGLContext")]
    pub struct GLContext(Object<ffi::GstGLContext, ffi::GstGLContextClass>) @extends gst::Object;

    match fn {
        type_ => || ffi::gst_gl_context_get_type(),
    }
}

impl GLContext {
    pub const NONE: Option<&'static GLContext> = None;

    /// Create a new [`GLContext`][crate::GLContext] with the specified `display`
    /// ## `display`
    /// a [`GLDisplay`][crate::GLDisplay]
    ///
    /// # Returns
    ///
    /// a new [`GLContext`][crate::GLContext]
    #[doc(alias = "gst_gl_context_new")]
    pub fn new(display: &impl IsA<GLDisplay>) -> GLContext {
        skip_assert_initialized!();
        unsafe { from_glib_none(ffi::gst_gl_context_new(display.as_ref().to_glib_none().0)) }
    }

    /// See also [`GLContextExt::activate()`][crate::prelude::GLContextExt::activate()].
    ///
    /// # Returns
    ///
    /// the [`GLContext`][crate::GLContext] active in the current thread or [`None`]
    #[doc(alias = "gst_gl_context_get_current")]
    #[doc(alias = "get_current")]
    pub fn current() -> Option<GLContext> {
        assert_initialized_main_thread!();
        unsafe { from_glib_none(ffi::gst_gl_context_get_current()) }
    }

    /// If an error occurs, `major` and `minor` are not modified and `GST_GL_API_NONE` is
    /// returned.
    /// ## `platform`
    /// the [`GLPlatform`][crate::GLPlatform] to retrieve the API for
    ///
    /// # Returns
    ///
    /// The version supported by the OpenGL context current in the calling
    ///  thread or `GST_GL_API_NONE`
    ///
    /// ## `major`
    /// the major version
    ///
    /// ## `minor`
    /// the minor version
    #[doc(alias = "gst_gl_context_get_current_gl_api")]
    #[doc(alias = "get_current_gl_api")]
    pub fn current_gl_api(platform: GLPlatform) -> (GLAPI, u32, u32) {
        assert_initialized_main_thread!();
        unsafe {
            let mut major = std::mem::MaybeUninit::uninit();
            let mut minor = std::mem::MaybeUninit::uninit();
            let ret = from_glib(ffi::gst_gl_context_get_current_gl_api(
                platform.into_glib(),
                major.as_mut_ptr(),
                minor.as_mut_ptr(),
            ));
            (ret, major.assume_init(), minor.assume_init())
        }
    }
}

unsafe impl Send for GLContext {}
unsafe impl Sync for GLContext {}

mod sealed {
    pub trait Sealed {}
    impl<T: super::IsA<super::GLContext>> Sealed for T {}
}

/// Trait containing all [`struct@GLContext`] methods.
///
/// # Implementors
///
/// [`GLContext`][struct@crate::GLContext]
pub trait GLContextExt: IsA<GLContext> + sealed::Sealed + 'static {
    /// (De)activate the OpenGL context represented by this `self`.
    ///
    /// In OpenGL terms, calls eglMakeCurrent or similar with this context and the
    /// currently set window. See [`set_window()`][Self::set_window()] for details.
    /// ## `activate`
    /// [`true`] to activate, [`false`] to deactivate
    ///
    /// # Returns
    ///
    /// Whether the activation succeeded
    #[doc(alias = "gst_gl_context_activate")]
    fn activate(&self, activate: bool) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib::result_from_gboolean!(
                ffi::gst_gl_context_activate(self.as_ref().to_glib_none().0, activate.into_glib()),
                "Failed to activate OpenGL context"
            )
        }
    }

    /// Note: This will always fail for two wrapped [`GLContext`][crate::GLContext]'s
    /// ## `other_context`
    /// another [`GLContext`][crate::GLContext]
    ///
    /// # Returns
    ///
    /// whether `self` and `other_context` are able to share OpenGL
    ///  resources.
    #[doc(alias = "gst_gl_context_can_share")]
    fn can_share(&self, other_context: &impl IsA<GLContext>) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_can_share(
                self.as_ref().to_glib_none().0,
                other_context.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Check for an OpenGL `feature` being supported.
    ///
    /// Note: Most features require that the context be created before it is
    /// possible to determine their existence and so will fail if that is not the
    /// case.
    /// ## `feature`
    /// a platform specific feature
    ///
    /// # Returns
    ///
    /// Whether `feature` is supported by `self`
    #[doc(alias = "gst_gl_context_check_feature")]
    fn check_feature(&self, feature: &str) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_check_feature(
                self.as_ref().to_glib_none().0,
                feature.to_glib_none().0,
            ))
        }
    }

    /// Must be called with `self` current.
    /// ## `fbo_target`
    /// the GL value of the framebuffer target, GL_FRAMEBUFFER,
    ///  GL_READ_FRAMEBUFFER, GL_DRAW_FRAMEBUFFER
    ///
    /// # Returns
    ///
    /// whether whether the current framebuffer is complete
    #[doc(alias = "gst_gl_context_check_framebuffer_status")]
    fn check_framebuffer_status(&self, fbo_target: u32) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_check_framebuffer_status(
                self.as_ref().to_glib_none().0,
                fbo_target,
            ))
        }
    }

    /// ## `api`
    /// api type required
    /// ## `maj`
    /// major version required
    /// ## `min`
    /// minor version required
    ///
    /// # Returns
    ///
    /// whether OpenGL context implements the required api and specified
    /// version.
    #[doc(alias = "gst_gl_context_check_gl_version")]
    fn check_gl_version(&self, api: GLAPI, maj: i32, min: i32) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_check_gl_version(
                self.as_ref().to_glib_none().0,
                api.into_glib(),
                maj,
                min,
            ))
        }
    }

    /// Unbind the current framebuffer
    #[doc(alias = "gst_gl_context_clear_framebuffer")]
    fn clear_framebuffer(&self) {
        unsafe {
            ffi::gst_gl_context_clear_framebuffer(self.as_ref().to_glib_none().0);
        }
    }

    /// Clear's the currently set shader from the GL state machine.
    ///
    /// Note: must be called in the GL thread.
    #[doc(alias = "gst_gl_context_clear_shader")]
    fn clear_shader(&self) {
        unsafe {
            ffi::gst_gl_context_clear_shader(self.as_ref().to_glib_none().0);
        }
    }

    /// Creates an OpenGL context with the specified `other_context` as a context
    /// to share shareable OpenGL objects with. See the OpenGL specification for
    /// what is shared between OpenGL contexts.
    ///
    /// Since 1.20, the configuration can be overriden with the environment variable
    /// `GST_GL_CONFIG` which is a stringified [`gst::Structure`][crate::gst::Structure] as would be returned
    /// from [`config()`][Self::config()]. If `GST_GL_CONFIG` is not set, then the
    /// config will be chosen from `other_context` by calling
    /// [`config()`][Self::config()] on `other_context`. Otherwise, a default
    /// configuration is used.
    ///
    /// Calling [`request_config()`][Self::request_config()]) before calling
    /// [`create()`][Self::create()] will override the config from `other_context` but
    /// will not override the `GST_GL_CONFIG` environment variable.
    ///
    /// If an error occurs, and `error` is not [`None`], then `error` will contain
    /// details of the error and [`false`] will be returned.
    ///
    /// Should only be called once.
    /// ## `other_context`
    /// a [`GLContext`][crate::GLContext] to share OpenGL objects with
    ///
    /// # Returns
    ///
    /// whether the context could successfully be created
    #[doc(alias = "gst_gl_context_create")]
    fn create(&self, other_context: Option<&impl IsA<GLContext>>) -> Result<(), glib::Error> {
        unsafe {
            let mut error = std::ptr::null_mut();
            let is_ok = ffi::gst_gl_context_create(
                self.as_ref().to_glib_none().0,
                other_context.map(|p| p.as_ref()).to_glib_none().0,
                &mut error,
            );
            debug_assert_eq!(is_ok == glib::ffi::GFALSE, !error.is_null());
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    #[doc(alias = "gst_gl_context_destroy")]
    fn destroy(&self) {
        unsafe {
            ffi::gst_gl_context_destroy(self.as_ref().to_glib_none().0);
        }
    }

    /// Fills `self`'s info (version, extensions, vtable, etc) from the GL
    /// context in the current thread. Typically used with wrapped contexts to
    /// allow wrapped contexts to be used as regular [`GLContext`][crate::GLContext]'s.
    #[doc(alias = "gst_gl_context_fill_info")]
    fn fill_info(&self) -> Result<(), glib::Error> {
        unsafe {
            let mut error = std::ptr::null_mut();
            let is_ok = ffi::gst_gl_context_fill_info(self.as_ref().to_glib_none().0, &mut error);
            debug_assert_eq!(is_ok == glib::ffi::GFALSE, !error.is_null());
            if error.is_null() {
                Ok(())
            } else {
                Err(from_glib_full(error))
            }
        }
    }

    /// Retrieve the OpenGL configuration for this context. The context must
    /// have been successfully created for this function to return a valid value.
    ///
    /// Not all implementations currently support retrieving the config and will
    /// return [`None`] when not supported.
    ///
    /// # Returns
    ///
    /// the configuration chosen for this OpenGL context.
    #[cfg(feature = "v1_20")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_20")))]
    #[doc(alias = "gst_gl_context_get_config")]
    #[doc(alias = "get_config")]
    fn config(&self) -> Option<gst::Structure> {
        unsafe {
            from_glib_full(ffi::gst_gl_context_get_config(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    ///
    /// # Returns
    ///
    /// the [`GLDisplay`][crate::GLDisplay] associated with this `self`
    #[doc(alias = "gst_gl_context_get_display")]
    #[doc(alias = "get_display")]
    fn display(&self) -> GLDisplay {
        unsafe {
            from_glib_full(ffi::gst_gl_context_get_display(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Get the currently enabled OpenGL api.
    ///
    /// The currently available API may be limited by the [`GLDisplay`][crate::GLDisplay] in use and/or
    /// the [`GLWindow`][crate::GLWindow] chosen.
    ///
    /// # Returns
    ///
    /// the available OpenGL api
    #[doc(alias = "gst_gl_context_get_gl_api")]
    #[doc(alias = "get_gl_api")]
    fn gl_api(&self) -> GLAPI {
        unsafe {
            from_glib(ffi::gst_gl_context_get_gl_api(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Gets the OpenGL platform that used by `self`.
    ///
    /// # Returns
    ///
    /// The platform specific backing OpenGL context
    #[doc(alias = "gst_gl_context_get_gl_platform")]
    #[doc(alias = "get_gl_platform")]
    fn gl_platform(&self) -> GLPlatform {
        unsafe {
            from_glib(ffi::gst_gl_context_get_gl_platform(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Get the version of the OpenGL platform (GLX, EGL, etc) used. Only valid
    /// after a call to [`create()`][Self::create()].
    ///
    /// # Returns
    ///
    ///
    /// ## `major`
    /// return for the major version
    ///
    /// ## `minor`
    /// return for the minor version
    #[doc(alias = "gst_gl_context_get_gl_platform_version")]
    #[doc(alias = "get_gl_platform_version")]
    fn gl_platform_version(&self) -> (i32, i32) {
        unsafe {
            let mut major = std::mem::MaybeUninit::uninit();
            let mut minor = std::mem::MaybeUninit::uninit();
            ffi::gst_gl_context_get_gl_platform_version(
                self.as_ref().to_glib_none().0,
                major.as_mut_ptr(),
                minor.as_mut_ptr(),
            );
            (major.assume_init(), minor.assume_init())
        }
    }

    /// Returns the OpenGL version implemented by `self`. See
    /// [`gl_api()`][Self::gl_api()] for retrieving the OpenGL api implemented by
    /// `self`.
    ///
    /// # Returns
    ///
    ///
    /// ## `maj`
    /// resulting major version
    ///
    /// ## `min`
    /// resulting minor version
    #[doc(alias = "gst_gl_context_get_gl_version")]
    #[doc(alias = "get_gl_version")]
    fn gl_version(&self) -> (i32, i32) {
        unsafe {
            let mut maj = std::mem::MaybeUninit::uninit();
            let mut min = std::mem::MaybeUninit::uninit();
            ffi::gst_gl_context_get_gl_version(
                self.as_ref().to_glib_none().0,
                maj.as_mut_ptr(),
                min.as_mut_ptr(),
            );
            (maj.assume_init(), min.assume_init())
        }
    }

    ///
    /// # Returns
    ///
    /// the currently set window
    #[doc(alias = "gst_gl_context_get_window")]
    #[doc(alias = "get_window")]
    fn window(&self) -> Option<GLWindow> {
        unsafe {
            from_glib_full(ffi::gst_gl_context_get_window(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    ///
    /// # Returns
    ///
    /// Whether the [`GLContext`][crate::GLContext] has been shared with another [`GLContext`][crate::GLContext]
    #[doc(alias = "gst_gl_context_is_shared")]
    fn is_shared(&self) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_is_shared(
                self.as_ref().to_glib_none().0,
            ))
        }
    }

    /// Set the OpenGL configuration for this context. The context must not
    /// have been created for this function to succeed. Setting a [`None`]
    /// `config` has the affect of removing any specific configuration request.
    ///
    /// Not all implementations currently support retrieving the config and this
    /// function will return FALSE when not supported.
    ///
    /// Note that calling this function may cause a subsequent
    /// [`create()`][Self::create()] to fail if `config` could not be matched with
    /// the platform-specific configuration.
    ///
    /// Note that the actual config used may be differ from the requested values.
    /// ## `gl_config`
    /// a configuration structure for
    ///  configuring the OpenGL context
    ///
    /// # Returns
    ///
    /// whether `gl_config` could be successfully set on `self`
    #[cfg(feature = "v1_20")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_20")))]
    #[doc(alias = "gst_gl_context_request_config")]
    fn request_config(&self, gl_config: Option<gst::Structure>) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_request_config(
                self.as_ref().to_glib_none().0,
                gl_config.into_glib_ptr(),
            ))
        }
    }

    /// Will internally set `self` as shared with `share`
    /// ## `share`
    /// another [`GLContext`][crate::GLContext]
    #[doc(alias = "gst_gl_context_set_shared_with")]
    fn set_shared_with(&self, share: &impl IsA<GLContext>) {
        unsafe {
            ffi::gst_gl_context_set_shared_with(
                self.as_ref().to_glib_none().0,
                share.as_ref().to_glib_none().0,
            );
        }
    }

    /// Set's the current window on `self` to `window`. The window can only be
    /// changed before [`create()`][Self::create()] has been called and the `window` is not
    /// already running.
    /// ## `window`
    /// a [`GLWindow`][crate::GLWindow]
    ///
    /// # Returns
    ///
    /// Whether the window was successfully updated
    #[doc(alias = "gst_gl_context_set_window")]
    fn set_window(&self, window: impl IsA<GLWindow>) -> Result<(), glib::error::BoolError> {
        unsafe {
            glib::result_from_gboolean!(
                ffi::gst_gl_context_set_window(
                    self.as_ref().to_glib_none().0,
                    window.upcast().into_glib_ptr()
                ),
                "Failed to set window"
            )
        }
    }

    /// ## `version`
    /// a [`GLSLVersion`][crate::GLSLVersion]
    /// ## `profile`
    /// a [`GLSLProfile`][crate::GLSLProfile]
    ///
    /// # Returns
    ///
    /// Whether `self` supports the combination of `version` with `profile`
    #[doc(alias = "gst_gl_context_supports_glsl_profile_version")]
    fn supports_glsl_profile_version(&self, version: GLSLVersion, profile: GLSLProfile) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_supports_glsl_profile_version(
                self.as_ref().to_glib_none().0,
                version.into_glib(),
                profile.into_glib(),
            ))
        }
    }

    /// ## `version`
    /// a [`GLSLVersion`][crate::GLSLVersion]
    /// ## `profile`
    /// a [`GLSLProfile`][crate::GLSLProfile]
    ///
    /// # Returns
    ///
    /// whether `self` supports the 'precision' specifier in GLSL shaders
    #[cfg(feature = "v1_16")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_16")))]
    #[doc(alias = "gst_gl_context_supports_precision")]
    fn supports_precision(&self, version: GLSLVersion, profile: GLSLProfile) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_supports_precision(
                self.as_ref().to_glib_none().0,
                version.into_glib(),
                profile.into_glib(),
            ))
        }
    }

    /// ## `version`
    /// a [`GLSLVersion`][crate::GLSLVersion]
    /// ## `profile`
    /// a [`GLSLProfile`][crate::GLSLProfile]
    ///
    /// # Returns
    ///
    /// whether `self` supports the 'precision highp' specifier in GLSL shaders
    #[cfg(feature = "v1_16")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_16")))]
    #[doc(alias = "gst_gl_context_supports_precision_highp")]
    fn supports_precision_highp(&self, version: GLSLVersion, profile: GLSLProfile) -> bool {
        unsafe {
            from_glib(ffi::gst_gl_context_supports_precision_highp(
                self.as_ref().to_glib_none().0,
                version.into_glib(),
                profile.into_glib(),
            ))
        }
    }

    /// Swap the front and back buffers on the window attached to `self`.
    /// This will display the frame on the next refresh cycle.
    #[doc(alias = "gst_gl_context_swap_buffers")]
    fn swap_buffers(&self) {
        unsafe {
            ffi::gst_gl_context_swap_buffers(self.as_ref().to_glib_none().0);
        }
    }
}

impl<O: IsA<GLContext>> GLContextExt for O {}