Create reorganization

1 files changed, 0 insertions, 586 deletions

diff --git a/src/win32/init.rs b/src/win32/init.rs
deleted file mode 100644
index 5cdd6b8..0000000
--- a/src/win32/init.rs
+++ /dev/null
@@ -1,586 +0,0 @@
-use std::sync::atomic::AtomicBool;
-use std::sync::{Arc, Mutex};
-use std::io;
-use std::ptr;
-use std::mem;
-use std::thread;
-
-use super::callback;
-use super::Window;
-use super::MonitorID;
-use super::ContextWrapper;
-use super::WindowWrapper;
-use super::make_current_guard::CurrentContextGuard;
-
-use Api;
-use BuilderAttribs;
-use CreationError;
-use CreationError::OsError;
-use CursorState;
-use GlRequest;
-use PixelFormat;
-
-use std::ffi::{CStr, CString, OsStr};
-use std::os::windows::ffi::OsStrExt;
-use std::sync::mpsc::channel;
-
-use libc;
-use super::gl;
-use winapi;
-use kernel32;
-use user32;
-use gdi32;
-
-/// Work-around the fact that HGLRC doesn't implement Send
-pub struct ContextHack(pub winapi::HGLRC);
-unsafe impl Send for ContextHack {}
-
-pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<ContextHack>)
-                  -> Result<Window, CreationError>
-{
-    // initializing variables to be sent to the task
-
-    let title = OsStr::new(&builder.title).encode_wide().chain(Some(0).into_iter())
-                                          .collect::<Vec<_>>();
-
-    let (tx, rx) = channel();
-
-    // `GetMessage` must be called in the same thread as CreateWindow, so we create a new thread
-    // dedicated to this window.
-    thread::spawn(move || {
-        unsafe {
-            // creating and sending the `Window`
-            match init(title, builder, builder_sharelists) {
-                Ok(w) => tx.send(Ok(w)).ok(),
-                Err(e) => {
-                    tx.send(Err(e)).ok();
-                    return;
-                }
-            };
-
-            // now that the `Window` struct is initialized, the main `Window::new()` function will
-            //  return and this events loop will run in parallel
-            loop {
-                let mut msg = mem::uninitialized();
-
-                if user32::GetMessageW(&mut msg, ptr::null_mut(), 0, 0) == 0 {
-                    break;
-                }
-
-                user32::TranslateMessage(&msg);
-                user32::DispatchMessageW(&msg);   // calls `callback` (see the callback module)
-            }
-        }
-    });
-
-    rx.recv().unwrap()
-}
-
-unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>,
-               builder_sharelists: Option<ContextHack>) -> Result<Window, CreationError>
-{
-    let builder_sharelists = builder_sharelists.map(|s| s.0);
-
-    // registering the window class
-    let class_name = register_window_class();
-
-    // building a RECT object with coordinates
-    let mut rect = winapi::RECT {
-        left: 0, right: builder.dimensions.unwrap_or((1024, 768)).0 as winapi::LONG,
-        top: 0, bottom: builder.dimensions.unwrap_or((1024, 768)).1 as winapi::LONG,
-    };
-
-    // switching to fullscreen if necessary
-    // this means adjusting the window's position so that it overlaps the right monitor,
-    //  and change the monitor's resolution if necessary
-    if builder.monitor.is_some() {
-        let monitor = builder.monitor.as_ref().unwrap();
-        try!(switch_to_fullscreen(&mut rect, monitor));
-    }
-
-    // computing the style and extended style of the window
-    let (ex_style, style) = if builder.monitor.is_some() {
-        (winapi::WS_EX_APPWINDOW, winapi::WS_POPUP | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN)
-    } else {
-        (winapi::WS_EX_APPWINDOW | winapi::WS_EX_WINDOWEDGE,
-            winapi::WS_OVERLAPPEDWINDOW | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN)
-    };
-
-    // adjusting the window coordinates using the style
-    user32::AdjustWindowRectEx(&mut rect, style, 0, ex_style);
-
-    // the first step is to create a dummy window and a dummy context which we will use
-    // to load the pointers to some functions in the OpenGL driver in `extra_functions`
-    let extra_functions = {
-        // creating a dummy invisible window
-        let dummy_window = {
-            let handle = user32::CreateWindowExW(ex_style, class_name.as_ptr(),
-                title.as_ptr() as winapi::LPCWSTR,
-                style | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN,
-                winapi::CW_USEDEFAULT, winapi::CW_USEDEFAULT,
-                rect.right - rect.left, rect.bottom - rect.top,
-                ptr::null_mut(), ptr::null_mut(), kernel32::GetModuleHandleW(ptr::null()),
-                ptr::null_mut());
-
-            if handle.is_null() {
-                return Err(OsError(format!("CreateWindowEx function failed: {}",
-                                           format!("{}", io::Error::last_os_error()))));
-            }
-
-            let hdc = user32::GetDC(handle);
-            if hdc.is_null() {
-                let err = Err(OsError(format!("GetDC function failed: {}",
-                                              format!("{}", io::Error::last_os_error()))));
-                return err;
-            }
-
-            WindowWrapper(handle, hdc)
-        };
-
-        // getting the pixel format that we will use and setting it
-        {
-            let formats = enumerate_native_pixel_formats(&dummy_window);
-            let id = try!(choose_dummy_pixel_format(formats.into_iter()));
-            try!(set_pixel_format(&dummy_window, id));
-        }
-
-        // creating the dummy OpenGL context and making it current
-        let dummy_context = try!(create_context(None, &dummy_window, None));
-        let current_context = try!(CurrentContextGuard::make_current(&dummy_window,
-                                                                     &dummy_context));
-
-        // loading the extra WGL functions
-        gl::wgl_extra::Wgl::load_with(|addr| {
-            use libc;
-
-            let addr = CString::new(addr.as_bytes()).unwrap();
-            let addr = addr.as_ptr();
-
-            gl::wgl::GetProcAddress(addr) as *const libc::c_void
-        })
-    };
-
-    // creating the real window this time, by using the functions in `extra_functions`
-    let real_window = {
-        let (width, height) = if builder.monitor.is_some() || builder.dimensions.is_some() {
-            (Some(rect.right - rect.left), Some(rect.bottom - rect.top))
-        } else {
-            (None, None)
-        };
-
-        let (x, y) = if builder.monitor.is_some() {
-            (Some(rect.left), Some(rect.top))
-        } else {
-            (None, None)
-        };
-
-        let style = if !builder.visible || builder.headless {
-            style
-        } else {
-            style | winapi::WS_VISIBLE
-        };
-
-        let handle = user32::CreateWindowExW(ex_style, class_name.as_ptr(),
-            title.as_ptr() as winapi::LPCWSTR,
-            style | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN,
-            x.unwrap_or(winapi::CW_USEDEFAULT), y.unwrap_or(winapi::CW_USEDEFAULT),
-            width.unwrap_or(winapi::CW_USEDEFAULT), height.unwrap_or(winapi::CW_USEDEFAULT),
-            ptr::null_mut(), ptr::null_mut(), kernel32::GetModuleHandleW(ptr::null()),
-            ptr::null_mut());
-
-        if handle.is_null() {
-            return Err(OsError(format!("CreateWindowEx function failed: {}",
-                                       format!("{}", io::Error::last_os_error()))));
-        }
-
-        let hdc = user32::GetDC(handle);
-        if hdc.is_null() {
-            return Err(OsError(format!("GetDC function failed: {}",
-                                       format!("{}", io::Error::last_os_error()))));
-        }
-
-        WindowWrapper(handle, hdc)
-    };
-
-    // calling SetPixelFormat
-    let pixel_format = {
-        let formats = if extra_functions.GetPixelFormatAttribivARB.is_loaded() {
-            enumerate_arb_pixel_formats(&extra_functions, &real_window)
-        } else {
-            enumerate_native_pixel_formats(&real_window)
-        };
-
-        let (id, f) = try!(builder.choose_pixel_format(formats.into_iter().map(|(a, b)| (b, a))));
-        try!(set_pixel_format(&real_window, id));
-        f
-    };
-
-    // creating the OpenGL context
-    let context = try!(create_context(Some((&extra_functions, &builder)), &real_window,
-                                      builder_sharelists));
-
-    // calling SetForegroundWindow if fullscreen
-    if builder.monitor.is_some() {
-        user32::SetForegroundWindow(real_window.0);
-    }
-
-    // Creating a mutex to track the current cursor state
-    let cursor_state = Arc::new(Mutex::new(CursorState::Normal));
-
-    // filling the CONTEXT_STASH task-local storage so that we can start receiving events
-    let events_receiver = {
-        let (tx, rx) = channel();
-        let mut tx = Some(tx);
-        callback::CONTEXT_STASH.with(|context_stash| {
-            let data = callback::ThreadLocalData {
-                win: real_window.0,
-                sender: tx.take().unwrap(),
-                cursor_state: cursor_state.clone()
-            };
-            (*context_stash.borrow_mut()) = Some(data);
-        });
-        rx
-    };
-
-    // loading the opengl32 module
-    let gl_library = try!(load_opengl32_dll());
-
-    // handling vsync
-    if builder.vsync {
-        if extra_functions.SwapIntervalEXT.is_loaded() {
-            let _guard = try!(CurrentContextGuard::make_current(&real_window, &context));
-
-            if extra_functions.SwapIntervalEXT(1) == 0 {
-                return Err(OsError(format!("wglSwapIntervalEXT failed")));
-            }
-        }
-    }
-
-    // building the struct
-    Ok(Window {
-        window: real_window,
-        context: context,
-        gl_library: gl_library,
-        events_receiver: events_receiver,
-        is_closed: AtomicBool::new(false),
-        cursor_state: cursor_state,
-        pixel_format: pixel_format,
-    })
-}
-
-unsafe fn register_window_class() -> Vec<u16> {
-    let class_name = OsStr::new("Window Class").encode_wide().chain(Some(0).into_iter())
-                                               .collect::<Vec<_>>();
-    
-    let class = winapi::WNDCLASSEXW {
-        cbSize: mem::size_of::<winapi::WNDCLASSEXW>() as winapi::UINT,
-        style: winapi::CS_HREDRAW | winapi::CS_VREDRAW | winapi::CS_OWNDC,
-        lpfnWndProc: Some(callback::callback),
-        cbClsExtra: 0,
-        cbWndExtra: 0,
-        hInstance: kernel32::GetModuleHandleW(ptr::null()),
-        hIcon: ptr::null_mut(),
-        hCursor: ptr::null_mut(),       // must be null in order for cursor state to work properly
-        hbrBackground: ptr::null_mut(),
-        lpszMenuName: ptr::null(),
-        lpszClassName: class_name.as_ptr(),
-        hIconSm: ptr::null_mut(),
-    };
-
-    // We ignore errors because registering the same window class twice would trigger
-    //  an error, and because errors here are detected during CreateWindowEx anyway.
-    // Also since there is no weird element in the struct, there is no reason for this
-    //  call to fail.
-    user32::RegisterClassExW(&class);
-
-    class_name
-}
-
-unsafe fn switch_to_fullscreen(rect: &mut winapi::RECT, monitor: &MonitorID)
-                               -> Result<(), CreationError>
-{
-    // adjusting the rect
-    {
-        let pos = monitor.get_position();
-        rect.left += pos.0 as winapi::LONG;
-        rect.right += pos.0 as winapi::LONG;
-        rect.top += pos.1 as winapi::LONG;
-        rect.bottom += pos.1 as winapi::LONG;
-    }
-
-    // changing device settings
-    let mut screen_settings: winapi::DEVMODEW = mem::zeroed();
-    screen_settings.dmSize = mem::size_of::<winapi::DEVMODEW>() as winapi::WORD;
-    screen_settings.dmPelsWidth = (rect.right - rect.left) as winapi::DWORD;
-    screen_settings.dmPelsHeight = (rect.bottom - rect.top) as winapi::DWORD;
-    screen_settings.dmBitsPerPel = 32;      // TODO: ?
-    screen_settings.dmFields = winapi::DM_BITSPERPEL | winapi::DM_PELSWIDTH | winapi::DM_PELSHEIGHT;
-
-    let result = user32::ChangeDisplaySettingsExW(monitor.get_adapter_name().as_ptr(),
-                                                  &mut screen_settings, ptr::null_mut(),
-                                                  winapi::CDS_FULLSCREEN, ptr::null_mut());
-    
-    if result != winapi::DISP_CHANGE_SUCCESSFUL {
-        return Err(OsError(format!("ChangeDisplaySettings failed: {}", result)));
-    }
-
-    Ok(())
-}
-
-unsafe fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'static>)>,
-                         hdc: &WindowWrapper, share: Option<winapi::HGLRC>)
-                         -> Result<ContextWrapper, CreationError>
-{
-    let share = share.unwrap_or(ptr::null_mut());
-
-    let ctxt = if let Some((extra_functions, builder)) = extra {
-        if extra_functions.CreateContextAttribsARB.is_loaded() {
-            let mut attributes = Vec::new();
-
-            match builder.gl_version {
-                GlRequest::Latest => {},
-                GlRequest::Specific(Api::OpenGl, (major, minor)) => {
-                    attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
-                    attributes.push(major as libc::c_int);
-                    attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
-                    attributes.push(minor as libc::c_int);
-                },
-                GlRequest::Specific(Api::OpenGlEs, (major, minor)) => {
-                    if is_extension_supported(extra_functions, hdc,
-                                              "WGL_EXT_create_context_es2_profile")
-                    {
-                        attributes.push(gl::wgl_extra::CONTEXT_PROFILE_MASK_ARB as libc::c_int);
-                        attributes.push(gl::wgl_extra::CONTEXT_ES2_PROFILE_BIT_EXT as libc::c_int);
-                    } else {
-                        return Err(CreationError::NotSupported);
-                    }
-
-                    attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
-                    attributes.push(major as libc::c_int);
-                    attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
-                    attributes.push(minor as libc::c_int);
-                },
-                GlRequest::Specific(_, _) => return Err(CreationError::NotSupported),
-                GlRequest::GlThenGles { opengl_version: (major, minor), .. } => {
-                    attributes.push(gl::wgl_extra::CONTEXT_MAJOR_VERSION_ARB as libc::c_int);
-                    attributes.push(major as libc::c_int);
-                    attributes.push(gl::wgl_extra::CONTEXT_MINOR_VERSION_ARB as libc::c_int);
-                    attributes.push(minor as libc::c_int);
-                },
-            }
-
-            if builder.gl_debug {
-                attributes.push(gl::wgl_extra::CONTEXT_FLAGS_ARB as libc::c_int);
-                attributes.push(gl::wgl_extra::CONTEXT_DEBUG_BIT_ARB as libc::c_int);
-            }
-
-            attributes.push(0);
-
-            Some(extra_functions.CreateContextAttribsARB(hdc.1 as *const libc::c_void,
-                                                         share as *const libc::c_void,
-                                                         attributes.as_ptr()))
-
-        } else {
-            None
-        }
-    } else {
-        None
-    };
-
-    let ctxt = match ctxt {
-        Some(ctxt) => ctxt,
-        None => {
-            let ctxt = gl::wgl::CreateContext(hdc.1 as *const libc::c_void);
-            if !ctxt.is_null() && !share.is_null() {
-                gl::wgl::ShareLists(share as *const libc::c_void, ctxt);
-            };
-            ctxt
-        }
-    };
-
-    if ctxt.is_null() {
-        return Err(OsError(format!("OpenGL context creation failed: {}",
-                           format!("{}", io::Error::last_os_error()))));
-    }
-
-    Ok(ContextWrapper(ctxt as winapi::HGLRC))
-}
-
-unsafe fn enumerate_native_pixel_formats(hdc: &WindowWrapper) -> Vec<(PixelFormat, libc::c_int)> {
-    let size_of_pxfmtdescr = mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as u32;
-    let num = gdi32::DescribePixelFormat(hdc.1, 1, size_of_pxfmtdescr, ptr::null_mut());
-
-    let mut result = Vec::new();
-
-    for index in (0 .. num) {
-        let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed();
-        
-        if gdi32::DescribePixelFormat(hdc.1, index, size_of_pxfmtdescr, &mut output) == 0 {
-            continue;
-        }
-
-        if (output.dwFlags & winapi::PFD_DRAW_TO_WINDOW) == 0 {
-            continue;
-        }
-
-        if (output.dwFlags & winapi::PFD_SUPPORT_OPENGL) == 0 {
-            continue;
-        }
-
-        if output.iPixelType != winapi::PFD_TYPE_RGBA {
-            continue;
-        }
-
-        result.push((PixelFormat {
-            hardware_accelerated: (output.dwFlags & winapi::PFD_GENERIC_FORMAT) == 0,
-            red_bits: output.cRedBits,
-            green_bits: output.cGreenBits,
-            blue_bits: output.cBlueBits,
-            alpha_bits: output.cAlphaBits,
-            depth_bits: output.cDepthBits,
-            stencil_bits: output.cStencilBits,
-            stereoscopy: (output.dwFlags & winapi::PFD_STEREO) != 0,
-            double_buffer: (output.dwFlags & winapi::PFD_DOUBLEBUFFER) != 0,
-            multisampling: None,
-            srgb: false,
-        }, index));
-    }
-
-    result
-}
-
-unsafe fn enumerate_arb_pixel_formats(extra: &gl::wgl_extra::Wgl, hdc: &WindowWrapper)
-                                      -> Vec<(PixelFormat, libc::c_int)>
-{
-    let get_info = |index: u32, attrib: u32| {
-        let mut value = mem::uninitialized();
-        extra.GetPixelFormatAttribivARB(hdc.1 as *const libc::c_void, index as libc::c_int,
-                                        0, 1, [attrib as libc::c_int].as_ptr(),
-                                        &mut value);
-        value as u32
-    };
-
-    // getting the number of formats
-    // the `1` is ignored
-    let num = get_info(1, gl::wgl_extra::NUMBER_PIXEL_FORMATS_ARB);
-
-    let mut result = Vec::new();
-
-    for index in (0 .. num) {
-        if get_info(index, gl::wgl_extra::DRAW_TO_WINDOW_ARB) == 0 {
-            continue;
-        }
-        if get_info(index, gl::wgl_extra::SUPPORT_OPENGL_ARB) == 0 {
-            continue;
-        }
-
-        if get_info(index, gl::wgl_extra::ACCELERATION_ARB) == gl::wgl_extra::NO_ACCELERATION_ARB {
-            continue;
-        }
-
-        if get_info(index, gl::wgl_extra::PIXEL_TYPE_ARB) != gl::wgl_extra::TYPE_RGBA_ARB {
-            continue;
-        }
-
-        result.push((PixelFormat {
-            hardware_accelerated: true,
-            red_bits: get_info(index, gl::wgl_extra::RED_BITS_ARB) as u8,
-            green_bits: get_info(index, gl::wgl_extra::GREEN_BITS_ARB) as u8,
-            blue_bits: get_info(index, gl::wgl_extra::BLUE_BITS_ARB) as u8,
-            alpha_bits: get_info(index, gl::wgl_extra::ALPHA_BITS_ARB) as u8,
-            depth_bits: get_info(index, gl::wgl_extra::DEPTH_BITS_ARB) as u8,
-            stencil_bits: get_info(index, gl::wgl_extra::STENCIL_BITS_ARB) as u8,
-            stereoscopy: get_info(index, gl::wgl_extra::STEREO_ARB) != 0,
-            double_buffer: get_info(index, gl::wgl_extra::DOUBLE_BUFFER_ARB) != 0,
-            multisampling: {
-                if is_extension_supported(extra, hdc, "WGL_ARB_multisample") {
-                    match get_info(index, gl::wgl_extra::SAMPLES_ARB) {
-                        0 => None,
-                        a => Some(a as u16),
-                    }
-                } else {
-                    None
-                }
-            },
-            srgb: if is_extension_supported(extra, hdc, "WGL_ARB_framebuffer_sRGB") {
-                get_info(index, gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_ARB) != 0
-            } else if is_extension_supported(extra, hdc, "WGL_EXT_framebuffer_sRGB") {
-                get_info(index, gl::wgl_extra::FRAMEBUFFER_SRGB_CAPABLE_EXT) != 0
-            } else {
-                false
-            },
-        }, index as libc::c_int));
-    }
-
-    result
-}
-
-unsafe fn set_pixel_format(hdc: &WindowWrapper, id: libc::c_int) -> Result<(), CreationError> {
-    let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed();
-
-    if gdi32::DescribePixelFormat(hdc.1, id, mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>()
-                                  as winapi::UINT, &mut output) == 0
-    {
-        return Err(OsError(format!("DescribePixelFormat function failed: {}",
-                                   format!("{}", io::Error::last_os_error()))));
-    }
-
-    if gdi32::SetPixelFormat(hdc.1, id, &output) == 0 {
-        return Err(OsError(format!("SetPixelFormat function failed: {}",
-                                   format!("{}", io::Error::last_os_error()))));
-    }
-
-    Ok(())
-}
-
-unsafe fn load_opengl32_dll() -> Result<winapi::HMODULE, CreationError> {
-    let name = OsStr::new("opengl32.dll").encode_wide().chain(Some(0).into_iter())
-                                         .collect::<Vec<_>>();
-
-    let lib = kernel32::LoadLibraryW(name.as_ptr());
-
-    if lib.is_null() {
-        return Err(OsError(format!("LoadLibrary function failed: {}",
-                                    format!("{}", io::Error::last_os_error()))));
-    }
-
-    Ok(lib)
-}
-
-unsafe fn is_extension_supported(extra: &gl::wgl_extra::Wgl, hdc: &WindowWrapper,
-                                 extension: &str) -> bool
-{
-    let extensions = if extra.GetExtensionsStringARB.is_loaded() {
-        let data = extra.GetExtensionsStringARB(hdc.1 as *const _);
-        let data = CStr::from_ptr(data).to_bytes().to_vec();
-        String::from_utf8(data).unwrap()
-
-    } else if extra.GetExtensionsStringEXT.is_loaded() {
-        let data = extra.GetExtensionsStringEXT();
-        let data = CStr::from_ptr(data).to_bytes().to_vec();
-        String::from_utf8(data).unwrap()
-
-    } else {
-        return false;
-    };
-
-    extensions.split(" ").find(|&e| e == extension).is_some()
-}
-
-fn choose_dummy_pixel_format<I>(iter: I) -> Result<libc::c_int, CreationError>
-                                where I: Iterator<Item=(PixelFormat, libc::c_int)>
-{
-    let mut backup_id = None;
-
-    for (format, id) in iter {
-        if backup_id.is_none() {
-            backup_id = Some(id);
-        }
-
-        if format.hardware_accelerated {
-            return Ok(id);
-        }
-    }
-
-    backup_id.ok_or(CreationError::NotSupported)
-}