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// Copyright 2016 The Servo Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Evil private APIs.
//!
//! These are liable to change at any time. Use with caution!
use geometry::CGRect;
use libc::{c_int, c_uint};
use std::ptr;
pub struct CGSRegion {
region: ffi::CGSRegionRef,
}
impl Drop for CGSRegion {
fn drop(&mut self) {
unsafe {
ffi::CGSRegionRelease(self.region)
}
}
}
impl CGSRegion {
#[inline]
pub fn from_rect(rect: &CGRect) -> CGSRegion {
unsafe {
let mut region = ptr::null_mut();
assert!(ffi::CGSNewRegionWithRect(rect, &mut region) == 0);
CGSRegion {
region: region,
}
}
}
#[inline]
pub fn from_rects(rects: &[CGRect]) -> CGSRegion {
unsafe {
let mut region = ptr::null_mut();
assert!(ffi::CGSNewRegionWithRectList(rects.as_ptr(),
rects.len() as c_uint,
&mut region) == 0);
CGSRegion {
region: region,
}
}
}
}
/// This should always be memory-safe; the window server rejects any invalid surface IDs.
pub struct CGSSurface {
context_id: c_uint,
window_number: c_int,
surface_id: c_uint,
}
impl CGSSurface {
#[inline]
pub fn from_ids(context_id: c_uint, window_number: c_int, surface_id: c_uint) -> CGSSurface {
CGSSurface {
context_id: context_id,
window_number: window_number,
surface_id: surface_id,
}
}
#[inline]
pub fn id(&self) -> c_uint {
self.surface_id
}
#[inline]
pub fn set_shape(&self, region: &CGSRegion) {
unsafe {
assert!(ffi::CGSSetSurfaceShape(self.context_id,
self.window_number,
self.surface_id,
region.region) == 0)
}
}
}
mod ffi {
use geometry::CGRect;
use libc::{c_int, c_uint};
// This is an enum so that we can't easily make instances of this opaque type.
pub enum CGSRegionObject {}
pub type CGError = OSStatus;
pub type CGSRegionRef = *mut CGSRegionObject;
pub type OSStatus = i32;
#[link(name = "CoreGraphics", kind = "framework")]
extern {
pub fn CGSRegionRelease(region: CGSRegionRef);
pub fn CGSNewRegionWithRect(rect: *const CGRect, outRegion: *mut CGSRegionRef) -> CGError;
pub fn CGSNewRegionWithRectList(rects: *const CGRect,
rectCount: c_uint,
outRegion: *mut CGSRegionRef)
-> CGError;
pub fn CGSSetSurfaceShape(contextID: c_uint,
windowNumber: c_int,
surfaceID: c_uint,
region: CGSRegionRef)
-> CGError;
}
}