sixtyfps-rendering-backend-qt 0.0.3

/* LICENSE BEGIN
    This file is part of the SixtyFPS Project -- https://sixtyfps.io
    Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
    Copyright (c) 2020 Simon Hausmann <simon.hausmann@sixtyfps.io>

    SPDX-License-Identifier: GPL-3.0-only
    This file is also available under commercial licensing terms.
    Please contact info@sixtyfps.io for more information.
LICENSE END */

//! Wrapper around some most important types
//! Some of it is actually copied from the qmetaobject crate

#![allow(dead_code)]
use cpp::{cpp, cpp_class};

cpp! {{
    #include <QtGui/QImage>
}}

cpp_class!(
    pub unsafe struct QImage as "QImage"
);

impl QImage {
    pub fn data(&self) -> &[u8] {
        unsafe {
            let len = cpp!([self as "const QImage*"] -> usize as "std::size_t" { return self->sizeInBytes(); });
            let data = cpp!([self as "const QImage*"] -> *const u8 as "const unsigned char*" { return self->bits(); });
            return core::slice::from_raw_parts(data, len);
        }
    }
    pub fn size(&self) -> QSize {
        cpp!(unsafe [self as "const QImage*"] -> QSize as "QSize" { return self->size(); })
    }
}

cpp_class!(
    /// Wrapper around [`QString`][class] class.
    ///
    /// [class]: https://doc.qt.io/qt-5/qstring.html
    #[derive(PartialEq, PartialOrd, Eq, Ord)]
    pub unsafe struct QString as "QString"
);
impl QString {
    /// Return a slice containing the UTF-16 data.
    pub fn to_slice(&self) -> &[u16] {
        unsafe {
            let mut size: usize = 0;
            let c_ptr = cpp!([self as "const QString*", mut size as "size_t"] -> *const u16 as "const QChar*" {
                size = self->size();
                return self->constData();
            });
            std::slice::from_raw_parts(c_ptr, size)
        }
    }
}

impl<'a> From<&'a str> for QString {
    /// Copy the data from a `&str`.
    fn from(s: &'a str) -> QString {
        let len = s.len();
        let ptr = s.as_ptr();
        cpp!(unsafe [len as "size_t", ptr as "char*"] -> QString as "QString" {
            return QString::fromUtf8(ptr, len);
        })
    }
}
impl From<String> for QString {
    fn from(s: String) -> QString {
        QString::from(&*s)
    }
}
impl Into<String> for QString {
    fn into(self) -> String {
        String::from_utf16_lossy(self.to_slice())
    }
}

/// Bindings for [`QSize`][class] class.
///
/// [class]: https://doc.qt.io/qt-5/qsize.html
#[repr(C)]
#[derive(Default, Clone, Copy, PartialEq, Debug)]
pub struct QSize {
    pub width: u32,
    pub height: u32,
}

#[repr(C)]
#[derive(Default, Clone, Copy, PartialEq, Debug)]
pub struct QPoint {
    pub x: i32,
    pub y: i32,
}

#[repr(C)]
#[derive(Default, Clone, Copy, PartialEq, Debug)]
pub struct QMargins {
    pub left: i32,
    pub top: i32,
    pub right: i32,
    pub bottom: i32,
}

/// FIXME: qreal is not always f64
#[allow(non_camel_case_types)]
pub type qreal = f64;

#[repr(C)]
#[derive(Default, Clone, Copy, PartialEq, Debug)]
pub struct QRectF {
    pub x: qreal,
    pub y: qreal,
    pub width: qreal,
    pub height: qreal,
}