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#![cfg(target_os = "emscripten")]
use std::ffi::CString;
use libc;
use {Event, BuilderAttribs, CreationError, MouseCursor};
use Api;
use PixelFormat;
use ContextError;
use GlContext;
use std::collections::VecDeque;
mod ffi;
pub struct Window {
context: ffi::EMSCRIPTEN_WEBGL_CONTEXT_HANDLE,
}
pub struct PollEventsIterator<'a> {
window: &'a Window,
}
impl<'a> Iterator for PollEventsIterator<'a> {
type Item = Event;
fn next(&mut self) -> Option<Event> {
None
}
}
pub struct WaitEventsIterator<'a> {
window: &'a Window,
}
impl<'a> Iterator for WaitEventsIterator<'a> {
type Item = Event;
fn next(&mut self) -> Option<Event> {
None
}
}
#[derive(Clone)]
pub struct WindowProxy;
impl WindowProxy {
pub fn wakeup_event_loop(&self) {
unimplemented!()
}
}
pub struct MonitorID;
pub fn get_available_monitors() -> VecDeque<MonitorID> {
let mut list = VecDeque::new();
list.push_back(MonitorID);
list
}
pub fn get_primary_monitor() -> MonitorID {
MonitorID
}
impl MonitorID {
pub fn get_name(&self) -> Option<String> {
Some("Canvas".to_string())
}
pub fn get_dimensions(&self) -> (u32, u32) {
unimplemented!()
}
}
impl Window {
pub fn new(builder: BuilderAttribs) -> Result<Window, CreationError> {
// getting the default values of attributes
let mut attributes = unsafe {
use std::mem;
let mut attributes: ffi::EmscriptenWebGLContextAttributes = mem::uninitialized();
ffi::emscripten_webgl_init_context_attributes(&mut attributes);
attributes
};
// setting the attributes
// FIXME:
/*match builder.gl_version {
Some((major, minor)) => {
attributes.majorVersion = major as libc::c_int;
attributes.minorVersion = minor as libc::c_int;
},
None => ()
};*/
// creating the context
let context = unsafe {
use std::{mem, ptr};
let context = ffi::emscripten_webgl_create_context(ptr::null(), &attributes);
if context <= 0 {
return Err(CreationError::OsError(format!("Error while calling emscripten_webgl_create_context: {}",
error_to_str(mem::transmute(context)))));
}
context
};
// TODO: emscripten_set_webglcontextrestored_callback
Ok(Window {
context: context
})
}
pub fn set_title(&self, _title: &str) {
}
pub fn get_position(&self) -> Option<(i32, i32)> {
Some((0, 0))
}
pub fn set_position(&self, _: i32, _: i32) {
}
pub fn get_inner_size(&self) -> Option<(u32, u32)> {
unsafe {
use std::{mem, ptr};
let mut width = mem::uninitialized();
let mut height = mem::uninitialized();
if ffi::emscripten_get_element_css_size(ptr::null(), &mut width, &mut height)
!= ffi::EMSCRIPTEN_RESULT_SUCCESS
{
None
} else {
Some((width as u32, height as u32))
}
}
}
pub fn get_outer_size(&self) -> Option<(u32, u32)> {
self.get_inner_size()
}
pub fn set_inner_size(&self, width: u32, height: u32) {
unsafe {
use std::ptr;
ffi::emscripten_set_element_css_size(ptr::null(), width as libc::c_double, height
as libc::c_double);
}
}
pub fn poll_events(&self) -> PollEventsIterator {
PollEventsIterator {
window: self,
}
}
pub fn wait_events(&self) -> WaitEventsIterator {
WaitEventsIterator {
window: self,
}
}
pub fn create_window_proxy(&self) -> WindowProxy {
WindowProxy
}
pub fn show(&self) {}
pub fn hide(&self) {}
pub fn platform_display(&self) -> *mut libc::c_void {
unimplemented!()
}
pub fn platform_window(&self) -> *mut libc::c_void {
unimplemented!()
}
pub fn set_window_resize_callback(&mut self, _: Option<fn(u32, u32)>) {
}
pub fn set_cursor(&self, _cursor: MouseCursor) {
unimplemented!()
}
pub fn hidpi_factor(&self) -> f32 {
1.0
}
}
impl GlContext for Window {
unsafe fn make_current(&self) -> Result<(), ContextError> {
// TOOD: check if == EMSCRIPTEN_RESULT
ffi::emscripten_webgl_make_context_current(self.context);
Ok(())
}
fn is_current(&self) -> bool {
true // FIXME:
}
fn get_proc_address(&self, addr: &str) -> *const libc::c_void {
let addr = CString::new(addr.as_bytes()).unwrap();
let addr = addr.as_ptr();
unsafe {
ffi::emscripten_GetProcAddress(addr) as *const _
}
}
fn swap_buffers(&self) -> Result<(), ContextError> {
unsafe { ffi::emscripten_sleep(1); } // FIXME:
Ok(())
}
fn get_api(&self) -> Api {
Api::WebGl
}
fn get_pixel_format(&self) -> PixelFormat {
unimplemented!();
}
}
impl Drop for Window {
fn drop(&mut self) {
unsafe {
ffi::emscripten_exit_fullscreen();
ffi::emscripten_webgl_destroy_context(self.context);
}
}
}
fn error_to_str(code: ffi::EMSCRIPTEN_RESULT) -> &'static str {
match code {
ffi::EMSCRIPTEN_RESULT_SUCCESS | ffi::EMSCRIPTEN_RESULT_DEFERRED
=> "Internal error in the library (success detected as failure)",
ffi::EMSCRIPTEN_RESULT_NOT_SUPPORTED => "Not supported",
ffi::EMSCRIPTEN_RESULT_FAILED_NOT_DEFERRED => "Failed not deferred",
ffi::EMSCRIPTEN_RESULT_INVALID_TARGET => "Invalid target",
ffi::EMSCRIPTEN_RESULT_UNKNOWN_TARGET => "Unknown target",
ffi::EMSCRIPTEN_RESULT_INVALID_PARAM => "Invalid parameter",
ffi::EMSCRIPTEN_RESULT_FAILED => "Failed",
ffi::EMSCRIPTEN_RESULT_NO_DATA => "No data",
_ => "Undocumented error"
}
}
|
