diff options
Diffstat (limited to 'src/api/win32/init.rs')
| -rw-r--r-- | src/api/win32/init.rs | 444 |
1 files changed, 72 insertions, 372 deletions
diff --git a/src/api/win32/init.rs b/src/api/win32/init.rs index e5b0b3a..fb4e181 100644 --- a/src/api/win32/init.rs +++ b/src/api/win32/init.rs @@ -4,39 +4,43 @@ use std::io; use std::ptr; use std::mem; use std::thread; +use libc; use super::callback; use super::Window; use super::MonitorID; -use super::ContextWrapper; use super::WindowWrapper; -use super::make_current_guard::CurrentContextGuard; +use super::Context; use Api; use BuilderAttribs; use CreationError; use CreationError::OsError; use CursorState; -use GlProfile; use GlRequest; -use PixelFormat; -use std::ffi::{CStr, CString, OsStr}; +use std::ffi::{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 {} +use api::wgl; +use api::wgl::Context as WglContext; +use api::egl; +use api::egl::Context as EglContext; + +pub enum RawContext { + Egl(egl::ffi::egl::types::EGLContext), + Wgl(winapi::HGLRC), +} + +unsafe impl Send for RawContext {} +unsafe impl Sync for RawContext {} -pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<ContextHack>) +pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<RawContext>) -> Result<Window, CreationError> { // initializing variables to be sent to the task @@ -78,10 +82,8 @@ pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<C } unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, - builder_sharelists: Option<ContextHack>) -> Result<Window, CreationError> + builder_sharelists: Option<RawContext>) -> Result<Window, CreationError> { - let builder_sharelists = builder_sharelists.map(|s| s.0); - // registering the window class let class_name = register_window_class(); @@ -110,57 +112,6 @@ unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, // 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() { @@ -203,28 +154,66 @@ unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, WindowWrapper(handle, hdc) }; - // calling SetPixelFormat - let pixel_format = { - let formats = if extra_functions.GetPixelFormatAttribivARB.is_loaded() { - let f = enumerate_arb_pixel_formats(&extra_functions, &real_window); - if f.is_empty() { - enumerate_native_pixel_formats(&real_window) + // creating the OpenGL context + let context = match builder.gl_version { + GlRequest::Specific(Api::OpenGlEs, (major, minor)) => { + // trying to load EGL from the ATI drivers + + // TODO: use LoadLibraryA instead + let dll_name = if cfg!(target_pointer_width = "64") { + "atio6axx.dll" } else { - f + "atioglxx.dll" + }; + let dll_name = OsStr::new(dll_name).encode_wide().chain(Some(0).into_iter()) + .collect::<Vec<_>>(); + let dll = unsafe { kernel32::LoadLibraryW(dll_name.as_ptr()) }; + + if !dll.is_null() { + let egl = ::api::egl::ffi::egl::Egl::load_with(|name| { + let name = CString::new(name).unwrap(); + unsafe { kernel32::GetProcAddress(dll, name.as_ptr()) as *const libc::c_void } + }); + + if let Ok(c) = EglContext::new(egl, &builder, Some(ptr::null()), + real_window.0) + { + Context::Egl(c) + + } else { + let builder_sharelists = match builder_sharelists { + None => None, + Some(RawContext::Wgl(c)) => Some(c), + _ => unimplemented!() + }; + + try!(WglContext::new(&builder, real_window.0, builder_sharelists) + .map(Context::Wgl)) + } + + } else { + // falling back to WGL, which is always available + let builder_sharelists = match builder_sharelists { + None => None, + Some(RawContext::Wgl(c)) => Some(c), + _ => unimplemented!() + }; + + try!(WglContext::new(&builder, real_window.0, builder_sharelists) + .map(Context::Wgl)) } - } else { - enumerate_native_pixel_formats(&real_window) - }; + }, + _ => { + let builder_sharelists = match builder_sharelists { + None => None, + Some(RawContext::Wgl(c)) => Some(c), + _ => unimplemented!() + }; - let (id, f) = try!(builder.choose_pixel_format(formats.into_iter().map(|(a, b)| (b, a)))); - try!(set_pixel_format(&real_window, id)); - f + try!(WglContext::new(&builder, real_window.0, builder_sharelists).map(Context::Wgl)) + } }; - // 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); @@ -248,29 +237,13 @@ unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>, 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, }) } @@ -332,276 +305,3 @@ unsafe fn switch_to_fullscreen(rect: &mut winapi::RECT, monitor: &MonitorID) 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 let Some(profile) = builder.gl_profile { - if is_extension_supported(extra_functions, hdc, - "WGL_ARB_create_context_profile") - { - let flag = match profile { - GlProfile::Compatibility => - gl::wgl_extra::CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, - GlProfile::Core => - gl::wgl_extra::CONTEXT_CORE_PROFILE_BIT_ARB, - }; - attributes.push(gl::wgl_extra::CONTEXT_PROFILE_MASK_ARB as libc::c_int); - attributes.push(flag as libc::c_int); - } else { - return Err(CreationError::NotSupported); - } - } - - 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, - color_bits: output.cRedBits + output.cGreenBits + 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, - color_bits: get_info(index, gl::wgl_extra::RED_BITS_ARB) as u8 + - get_info(index, gl::wgl_extra::GREEN_BITS_ARB) as u8 + - 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) -} |