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use crate::subclass::prelude::*;
use crate::GLArea;
use gdk::GLContext;
use glib::translate::*;
use glib::Cast;
#[allow(clippy::upper_case_acronyms)]
pub trait GLAreaImpl: GLAreaImplExt + WidgetImpl {
fn create_context(&self) -> Option<GLContext> {
self.parent_create_context()
}
fn render(&self, context: &GLContext) -> bool {
self.parent_render(context)
}
fn resize(&self, width: i32, height: i32) {
self.parent_resize(width, height)
}
}
#[allow(clippy::upper_case_acronyms)]
pub trait GLAreaImplExt: ObjectSubclass {
fn parent_create_context(&self) -> Option<GLContext>;
fn parent_render(&self, context: &GLContext) -> bool;
fn parent_resize(&self, width: i32, height: i32);
}
impl<T: GLAreaImpl> GLAreaImplExt for T {
fn parent_create_context(&self) -> Option<GLContext> {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkGLAreaClass;
if let Some(f) = (*parent_class).create_context {
return Some(from_glib_none(f(self
.obj()
.unsafe_cast_ref::<GLArea>()
.to_glib_none()
.0)));
};
None
}
}
fn parent_render(&self, context: &GLContext) -> bool {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkGLAreaClass;
let f = (*parent_class)
.render
.expect("No parent class impl for \"render\"");
from_glib(f(
self.obj().unsafe_cast_ref::<GLArea>().to_glib_none().0,
context.to_glib_none().0,
))
}
}
fn parent_resize(&self, width: i32, height: i32) {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GtkGLAreaClass;
if let Some(f) = (*parent_class).resize {
f(
self.obj().unsafe_cast_ref::<GLArea>().to_glib_none().0,
width,
height,
)
}
}
}
}
unsafe impl<T: GLAreaImpl> IsSubclassable<T> for GLArea {
fn class_init(class: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(class);
let klass = class.as_mut();
klass.create_context = Some(gl_area_create_context::<T>);
klass.render = Some(gl_area_render::<T>);
klass.resize = Some(gl_area_resize::<T>);
}
}
unsafe extern "C" fn gl_area_create_context<T: GLAreaImpl>(
ptr: *mut ffi::GtkGLArea,
) -> *mut gdk::ffi::GdkGLContext {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
imp.create_context().to_glib_full()
}
unsafe extern "C" fn gl_area_render<T: GLAreaImpl>(
ptr: *mut ffi::GtkGLArea,
context: *mut gdk::ffi::GdkGLContext,
) -> glib::ffi::gboolean {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
imp.render(&from_glib_borrow(context)).into_glib()
}
unsafe extern "C" fn gl_area_resize<T: GLAreaImpl>(
ptr: *mut ffi::GtkGLArea,
width: i32,
height: i32,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
imp.resize(width, height)
}