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// 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 crate::{GLShader, RenderNode};
use glib::translate::*;
use std::fmt;

glib::wrapper! {
    /// A render node using a GL shader when drawing its children nodes.
    #[doc(alias = "GskGLShaderNode")]
    pub struct GLShaderNode(Shared<ffi::GskGLShaderNode>);

    match fn {
        ref => |ptr| ffi::gsk_render_node_ref(ptr as *mut ffi::GskRenderNode),
        unref => |ptr| ffi::gsk_render_node_unref(ptr as *mut ffi::GskRenderNode),
    }
}

impl glib::StaticType for GLShaderNode {
    fn static_type() -> glib::Type {
        unsafe { from_glib(ffi::gsk_gl_shader_node_get_type()) }
    }
}

impl GLShaderNode {
    /// Creates a [`RenderNode`][crate::RenderNode] that will render the given @shader into the
    /// area given by @bounds.
    ///
    /// The @args is a block of data to use for uniform input, as per types and
    /// offsets defined by the @shader. Normally this is generated by
    /// `Gsk::GLShader::format_args()` or [`ShaderArgsBuilder`][crate::ShaderArgsBuilder].
    ///
    /// See [`GLShader`][crate::GLShader] for details about how the shader should be written.
    ///
    /// All the children will be rendered into textures (if they aren't already
    /// `GskTextureNodes`, which will be used directly). These textures will be
    /// sent as input to the shader.
    ///
    /// If the renderer doesn't support GL shaders, or if there is any problem
    /// when compiling the shader, then the node will draw pink. You should use
    /// [`GLShader::compile()`][crate::GLShader::compile()] to ensure the @shader will work for the
    /// renderer before using it.
    /// ## `shader`
    /// the [`GLShader`][crate::GLShader]
    /// ## `bounds`
    /// the rectangle to render the shader into
    /// ## `args`
    /// Arguments for the uniforms
    /// ## `children`
    /// array of child nodes,
    ///   these will be rendered to textures and used as input.
    ///
    /// # Returns
    ///
    /// A new [`RenderNode`][crate::RenderNode]
    #[doc(alias = "gsk_gl_shader_node_new")]
    pub fn new(
        shader: &GLShader,
        bounds: &graphene::Rect,
        args: &glib::Bytes,
        children: &[RenderNode],
    ) -> GLShaderNode {
        skip_assert_initialized!();
        let n_children = children.len() as _;
        unsafe {
            from_glib_full(ffi::gsk_gl_shader_node_new(
                shader.to_glib_none().0,
                bounds.to_glib_none().0,
                args.to_glib_none().0,
                children.to_glib_none().0,
                n_children,
            ))
        }
    }

    /// Gets args for the node.
    ///
    /// # Returns
    ///
    /// A `GBytes` with the uniform arguments
    #[doc(alias = "gsk_gl_shader_node_get_args")]
    #[doc(alias = "get_args")]
    pub fn args(&self) -> glib::Bytes {
        unsafe { from_glib_none(ffi::gsk_gl_shader_node_get_args(self.to_glib_none().0)) }
    }

    /// Returns the number of children
    ///
    /// # Returns
    ///
    /// The number of children
    #[doc(alias = "gsk_gl_shader_node_get_n_children")]
    #[doc(alias = "get_n_children")]
    pub fn n_children(&self) -> u32 {
        unsafe { ffi::gsk_gl_shader_node_get_n_children(self.to_glib_none().0) }
    }

    /// Gets shader code for the node.
    ///
    /// # Returns
    ///
    /// the [`GLShader`][crate::GLShader] shader
    #[doc(alias = "gsk_gl_shader_node_get_shader")]
    #[doc(alias = "get_shader")]
    pub fn shader(&self) -> GLShader {
        unsafe { from_glib_none(ffi::gsk_gl_shader_node_get_shader(self.to_glib_none().0)) }
    }
}

impl fmt::Display for GLShaderNode {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("GLShaderNode")
    }
}