1use gdk::GLContext;
7use glib::translate::*;
8
9use crate::{ffi, prelude::*, subclass::prelude::*, GLArea};
10
11#[allow(clippy::upper_case_acronyms)]
12pub trait GLAreaImpl: WidgetImpl + ObjectSubclass<Type: IsA<GLArea>> {
13 fn create_context(&self) -> Option<GLContext> {
15 self.parent_create_context()
16 }
17
18 fn render(&self, context: &GLContext) -> glib::Propagation {
20 self.parent_render(context)
21 }
22
23 fn resize(&self, width: i32, height: i32) {
25 self.parent_resize(width, height)
26 }
27}
28
29#[allow(clippy::upper_case_acronyms)]
30pub trait GLAreaImplExt: GLAreaImpl {
31 fn parent_create_context(&self) -> Option<GLContext> {
32 unsafe {
33 let data = Self::type_data();
34 let parent_class = data.as_ref().parent_class() as *mut ffi::GtkGLAreaClass;
35 if let Some(f) = (*parent_class).create_context {
36 return Some(from_glib_none(f(self
37 .obj()
38 .unsafe_cast_ref::<GLArea>()
39 .to_glib_none()
40 .0)));
41 };
42 None
43 }
44 }
45
46 fn parent_render(&self, context: &GLContext) -> glib::Propagation {
47 unsafe {
48 let data = Self::type_data();
49 let parent_class = data.as_ref().parent_class() as *mut ffi::GtkGLAreaClass;
50 let f = (*parent_class)
51 .render
52 .expect("No parent class impl for \"render\"");
53 from_glib(f(
54 self.obj().unsafe_cast_ref::<GLArea>().to_glib_none().0,
55 context.to_glib_none().0,
56 ))
57 }
58 }
59
60 fn parent_resize(&self, width: i32, height: i32) {
61 unsafe {
62 let data = Self::type_data();
63 let parent_class = data.as_ref().parent_class() as *mut ffi::GtkGLAreaClass;
64 if let Some(f) = (*parent_class).resize {
65 f(
66 self.obj().unsafe_cast_ref::<GLArea>().to_glib_none().0,
67 width,
68 height,
69 )
70 }
71 }
72 }
73}
74
75impl<T: GLAreaImpl> GLAreaImplExt for T {}
76
77unsafe impl<T: GLAreaImpl> IsSubclassable<T> for GLArea {
78 fn class_init(class: &mut glib::Class<Self>) {
79 Self::parent_class_init::<T>(class);
80
81 let klass = class.as_mut();
82 klass.create_context = Some(gl_area_create_context::<T>);
83 klass.render = Some(gl_area_render::<T>);
84 klass.resize = Some(gl_area_resize::<T>);
85 }
86}
87
88unsafe extern "C" fn gl_area_create_context<T: GLAreaImpl>(
89 ptr: *mut ffi::GtkGLArea,
90) -> *mut gdk::ffi::GdkGLContext {
91 let instance = &*(ptr as *mut T::Instance);
92 let imp = instance.imp();
93
94 imp.create_context().into_glib_ptr()
95}
96
97unsafe extern "C" fn gl_area_render<T: GLAreaImpl>(
98 ptr: *mut ffi::GtkGLArea,
99 context: *mut gdk::ffi::GdkGLContext,
100) -> glib::ffi::gboolean {
101 let instance = &*(ptr as *mut T::Instance);
102 let imp = instance.imp();
103
104 imp.render(&from_glib_borrow(context)).into_glib()
105}
106
107unsafe extern "C" fn gl_area_resize<T: GLAreaImpl>(
108 ptr: *mut ffi::GtkGLArea,
109 width: i32,
110 height: i32,
111) {
112 let instance = &*(ptr as *mut T::Instance);
113 let imp = instance.imp();
114
115 imp.resize(width, height)
116}