gstreamer-rs/gstreamer-video/src/video_rectangle.rs
Marijn Suijten a208919c88 video/video_rectangle: Mark struct as repr(C) for FFI transparency
This struct is "reimplemented" to make it easier to access the fields
instead of going through `ffi::GstVideoRectangle`, but should be marked
`repr(C)` to remain binary-compatible.
2021-09-04 00:13:24 +02:00

68 lines
1.6 KiB
Rust

// Take a look at the license at the top of the repository in the LICENSE file.
use glib::translate::IntoGlib;
use std::mem;
#[repr(C)]
#[derive(Clone, Debug, Eq, PartialEq, Hash)]
pub struct VideoRectangle {
pub x: i32,
pub y: i32,
pub w: i32,
pub h: i32,
}
impl VideoRectangle {
pub fn new(x: i32, y: i32, w: i32, h: i32) -> Self {
skip_assert_initialized!();
Self { x, y, w, h }
}
}
pub fn center_video_rectangle(
src: &VideoRectangle,
dst: &VideoRectangle,
scale: bool,
) -> VideoRectangle {
skip_assert_initialized!();
let mut result = ffi::GstVideoRectangle {
x: 0,
y: 0,
w: 0,
h: 0,
};
let src_rect = ffi::GstVideoRectangle {
x: src.x,
y: src.y,
w: src.w,
h: src.h,
};
let dst_rect = ffi::GstVideoRectangle {
x: dst.x,
y: dst.y,
w: dst.w,
h: dst.h,
};
unsafe {
ffi::gst_video_sink_center_rect(src_rect, dst_rect, &mut result, scale.into_glib());
}
VideoRectangle::new(result.x, result.y, result.w, result.h)
}
#[doc(hidden)]
impl glib::translate::Uninitialized for VideoRectangle {
unsafe fn uninitialized() -> Self {
mem::zeroed()
}
}
#[doc(hidden)]
impl<'a> glib::translate::ToGlibPtrMut<'a, *mut ffi::GstVideoRectangle> for VideoRectangle {
type Storage = &'a mut Self;
fn to_glib_none_mut(
&'a mut self,
) -> glib::translate::StashMut<*mut ffi::GstVideoRectangle, Self> {
glib::translate::StashMut(self as *mut _ as *mut _, self)
}
}