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use bitmap_like::BitmapLike;
use core::Core;
use core::{check_bitmap_targeted_elsewhere, update_thread_state};
use ffi::*;
use libc::*;
use std::cell::RefCell;
use std::ffi::CString;
use std::rc::{Rc, Weak};
pub struct Bitmap
{
allegro_bitmap: *mut ALLEGRO_BITMAP,
owned: bool,
sub_bitmaps: Rc<RefCell<Vec<Rc<SubBitmap>>>>,
}
impl Bitmap
{
pub fn new(_: &Core, w: i32, h: i32) -> Result<Bitmap, ()>
{
unsafe {
let b = al_create_bitmap(w as c_int, h as c_int);
if b.is_null()
{
Err(())
}
else
{
Ok(Bitmap::wrap(b, true))
}
}
}
pub fn load(_: &Core, filename: &str) -> Result<Bitmap, ()>
{
unsafe {
let filename = CString::new(filename.as_bytes()).unwrap();
let b = al_load_bitmap(filename.as_ptr());
if b.is_null()
{
Err(())
}
else
{
Ok(Bitmap::wrap(b, true))
}
}
}
pub unsafe fn wrap(bmp: *mut ALLEGRO_BITMAP, own: bool) -> Bitmap
{
Bitmap {
allegro_bitmap: bmp,
owned: own,
sub_bitmaps: Rc::new(RefCell::new(vec![])),
}
}
pub unsafe fn clone_and_wrap(bmp: *mut ALLEGRO_BITMAP) -> Result<Bitmap, ()>
{
let b = al_clone_bitmap(bmp);
if b.is_null()
{
Err(())
}
else
{
Ok(Bitmap::wrap(b, true))
}
}
fn has_outstanding_sub_bitmaps(&self) -> bool
{
for bmp in &*self.sub_bitmaps.borrow()
{
if Rc::strong_count(&bmp) != 1
{
return true;
}
}
false
}
pub fn maybe_clone(&self) -> Result<Bitmap, ()>
{
unsafe { Bitmap::clone_and_wrap(self.allegro_bitmap) }
}
}
unsafe impl Send for Bitmap {}
unsafe impl Sync for Bitmap {}
impl BitmapLike for Bitmap
{
fn get_allegro_bitmap(&self) -> *mut ALLEGRO_BITMAP
{
self.allegro_bitmap
}
fn create_sub_bitmap(&self, x: i32, y: i32, w: i32, h: i32) -> Result<Weak<SubBitmap>, ()>
{
SubBitmap::new(
self.allegro_bitmap,
Rc::downgrade(&self.sub_bitmaps),
x,
y,
w,
h,
)
}
}
impl Clone for Bitmap
{
fn clone(&self) -> Bitmap
{
self.maybe_clone().unwrap()
}
}
impl Drop for Bitmap
{
fn drop(&mut self)
{
if self.has_outstanding_sub_bitmaps()
{
panic!("Bitmap has outstanding sub-bitmaps.");
}
if self.owned
{
unsafe {
check_bitmap_targeted_elsewhere(self.allegro_bitmap, "destroy");
al_destroy_bitmap(self.allegro_bitmap);
update_thread_state();
}
}
}
}
pub struct SubBitmap
{
allegro_bitmap: *mut ALLEGRO_BITMAP,
siblings: Weak<RefCell<Vec<Rc<SubBitmap>>>>,
}
impl SubBitmap
{
fn new(
parent: *mut ALLEGRO_BITMAP, siblings: Weak<RefCell<Vec<Rc<SubBitmap>>>>, x: i32, y: i32,
w: i32, h: i32,
) -> Result<Weak<SubBitmap>, ()>
{
let b =
unsafe { al_create_sub_bitmap(parent, x as c_int, y as c_int, w as c_int, h as c_int) };
if b.is_null()
{
Err(())
}
else
{
if let Some(siblings) = siblings.upgrade()
{
let sub_bitmap = Rc::new(SubBitmap {
allegro_bitmap: b,
siblings: Rc::downgrade(&siblings),
});
let ret = Rc::downgrade(&sub_bitmap);
siblings.borrow_mut().push(sub_bitmap);
Ok(ret)
}
else
{
Err(())
}
}
}
pub fn to_bitmap(&self) -> Result<Bitmap, ()>
{
unsafe { Bitmap::clone_and_wrap(self.allegro_bitmap) }
}
}
unsafe impl Send for SubBitmap {}
unsafe impl Sync for SubBitmap {}
impl BitmapLike for SubBitmap
{
fn get_allegro_bitmap(&self) -> *mut ALLEGRO_BITMAP
{
self.allegro_bitmap
}
fn create_sub_bitmap(&self, x: i32, y: i32, w: i32, h: i32) -> Result<Weak<SubBitmap>, ()>
{
SubBitmap::new(self.allegro_bitmap, self.siblings.clone(), x, y, w, h)
}
}
impl Drop for SubBitmap
{
fn drop(&mut self)
{
unsafe {
check_bitmap_targeted_elsewhere(self.allegro_bitmap, "destroy");
al_destroy_bitmap(self.allegro_bitmap);
update_thread_state();
}
}
}