diff options
Diffstat (limited to 'src/api')
| -rw-r--r-- | src/api/mod.rs | 1 | ||||
| -rw-r--r-- | src/api/wgl/gl.rs (renamed from src/api/win32/gl.rs) | 0 | ||||
| -rw-r--r-- | src/api/wgl/make_current_guard.rs (renamed from src/api/win32/make_current_guard.rs) | 9 | ||||
| -rw-r--r-- | src/api/wgl/mod.rs | 507 | ||||
| -rw-r--r-- | src/api/win32/init.rs | 382 | ||||
| -rw-r--r-- | src/api/win32/mod.rs | 55 |
6 files changed, 529 insertions, 425 deletions
diff --git a/src/api/mod.rs b/src/api/mod.rs index fe43616..db5590a 100644 --- a/src/api/mod.rs +++ b/src/api/mod.rs @@ -7,5 +7,6 @@ pub mod emscripten; pub mod glx; pub mod osmesa; pub mod wayland; +pub mod wgl; pub mod win32; pub mod x11; diff --git a/src/api/win32/gl.rs b/src/api/wgl/gl.rs index 1354d95..1354d95 100644 --- a/src/api/win32/gl.rs +++ b/src/api/wgl/gl.rs diff --git a/src/api/win32/make_current_guard.rs b/src/api/wgl/make_current_guard.rs index 8983899..b890c82 100644 --- a/src/api/win32/make_current_guard.rs +++ b/src/api/wgl/make_current_guard.rs @@ -6,9 +6,6 @@ use winapi; use CreationError; use super::gl; -use super::ContextWrapper; -use super::WindowWrapper; - /// A guard for when you want to make the context current. Destroying the guard restores the /// previously-current context. pub struct CurrentContextGuard<'a, 'b> { @@ -19,15 +16,13 @@ pub struct CurrentContextGuard<'a, 'b> { } impl<'a, 'b> CurrentContextGuard<'a, 'b> { - pub unsafe fn make_current(window: &'a WindowWrapper, context: &'b ContextWrapper) + pub unsafe fn make_current(hdc: winapi::HDC, context: winapi::HGLRC) -> Result<CurrentContextGuard<'a, 'b>, CreationError> { let previous_hdc = gl::wgl::GetCurrentDC() as winapi::HDC; let previous_hglrc = gl::wgl::GetCurrentContext() as winapi::HGLRC; - let result = gl::wgl::MakeCurrent(window.1 as *const libc::c_void, - context.0 as *const libc::c_void); - + let result = gl::wgl::MakeCurrent(hdc as *const _, context as *const _); if result == 0 { return Err(CreationError::OsError(format!("wglMakeCurrent function failed: {}", format!("{}", io::Error::last_os_error())))); diff --git a/src/api/wgl/mod.rs b/src/api/wgl/mod.rs new file mode 100644 index 0000000..1da20aa --- /dev/null +++ b/src/api/wgl/mod.rs @@ -0,0 +1,507 @@ +#![cfg(any(target_os = "windows"))] + +use BuilderAttribs; +use CreationError; +use GlContext; +use GlRequest; +use GlProfile; +use PixelFormat; +use Api; + +use self::make_current_guard::CurrentContextGuard; + +use libc; +use std::ffi::{CStr, CString, OsStr}; +use std::os::windows::ffi::OsStrExt; +use std::{mem, ptr}; +use std::io; + +use winapi; +use kernel32; +use user32; +use gdi32; + +mod make_current_guard; +mod gl; + +pub struct Context { + context: ContextWrapper, + + hdc: winapi::HDC, + + /// Binded to `opengl32.dll`. + /// + /// `wglGetProcAddress` returns null for GL 1.1 functions because they are + /// already defined by the system. This module contains them. + gl_library: winapi::HMODULE, + + /// The pixel format that has been used to create this context. + pixel_format: PixelFormat, +} + +/// A simple wrapper that destroys the window when it is destroyed. +struct WindowWrapper(winapi::HWND, winapi::HDC); + +impl Drop for WindowWrapper { + fn drop(&mut self) { + unsafe { + user32::DestroyWindow(self.0); + } + } +} + +struct ContextWrapper(winapi::HGLRC); + +impl Drop for ContextWrapper { + fn drop(&mut self) { + unsafe { + gl::wgl::DeleteContext(self.0 as *const _); + } + } +} + +impl Context { + /// Attempt to build a new WGL context on a window. + /// + /// The window must **not** have had `SetPixelFormat` called on it. + pub fn new(builder: &BuilderAttribs<'static>, window: winapi::HWND, + builder_sharelists: Option<winapi::HGLRC>) + -> Result<Context, CreationError> + { + unsafe { + let hdc = user32::GetDC(window); + if hdc.is_null() { + let err = Err(CreationError::OsError(format!("GetDC function failed: {}", + format!("{}", io::Error::last_os_error())))); + return err; + } + + // 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 = { + let (ex_style, style) = (winapi::WS_EX_APPWINDOW, winapi::WS_POPUP | + winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN); + + // creating a dummy invisible window + let dummy_window = { + let rect = { + let mut placement: winapi::WINDOWPLACEMENT = unsafe { mem::zeroed() }; + placement.length = mem::size_of::<winapi::WINDOWPLACEMENT>() as winapi::UINT; + if unsafe { user32::GetWindowPlacement(window, &mut placement) } == 0 { + panic!(); + } + placement.rcNormalPosition + }; + + let mut class_name = [0u16; 128]; + if user32::GetClassNameW(window, class_name.as_mut_ptr(), 128) == 0 { + return Err(CreationError::OsError(format!("GetClassNameW function failed: {}", + format!("{}", io::Error::last_os_error())))); + } + + let handle = user32::CreateWindowExW(ex_style, class_name.as_ptr(), + b"dummy window\0".as_ptr() as *const _, style, + 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(CreationError::OsError(format!("CreateWindowEx function failed: {}", + format!("{}", io::Error::last_os_error())))); + } + + let hdc = user32::GetDC(handle); + if hdc.is_null() { + let err = Err(CreationError::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.1); + let id = try!(choose_dummy_pixel_format(formats.into_iter())); + try!(set_pixel_format(dummy_window.1, id)); + } + + // creating the dummy OpenGL context and making it current + let dummy_context = try!(create_context(None, dummy_window.0, dummy_window.1, None)); + let _current_context = try!(CurrentContextGuard::make_current(dummy_window.1, + dummy_context.0)); + + // loading the extra WGL functions + gl::wgl_extra::Wgl::load_with(|addr| { + let addr = CString::new(addr.as_bytes()).unwrap(); + let addr = addr.as_ptr(); + gl::wgl::GetProcAddress(addr) as *const libc::c_void + }) + }; + + // calling SetPixelFormat + let pixel_format = { + let formats = if extra_functions.GetPixelFormatAttribivARB.is_loaded() { + let f = enumerate_arb_pixel_formats(&extra_functions, hdc); + if f.is_empty() { + enumerate_native_pixel_formats(hdc) + } else { + f + } + } else { + enumerate_native_pixel_formats(hdc) + }; + + let (id, f) = try!(builder.choose_pixel_format(formats.into_iter().map(|(a, b)| (b, a)))); + try!(set_pixel_format(hdc, id)); + f + }; + + // creating the OpenGL context + let context = try!(create_context(Some((&extra_functions, builder)), window, hdc, + builder_sharelists)); + + // 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(hdc, context.0)); + + if extra_functions.SwapIntervalEXT(1) == 0 { + return Err(CreationError::OsError(format!("wglSwapIntervalEXT failed"))); + } + } + } + + Ok(Context { + context: context, + hdc: hdc, + gl_library: gl_library, + pixel_format: pixel_format, + }) + } + } + + /// Returns the raw HGLRC. + pub fn get_hglrc(&self) -> winapi::HGLRC { + self.context.0 + } +} + +impl GlContext for Context { + unsafe fn make_current(&self) { + // TODO: check return value + gl::wgl::MakeCurrent(self.hdc as *const _, self.context.0 as *const _); + } + + fn is_current(&self) -> bool { + unsafe { gl::wgl::GetCurrentContext() == self.context.0 as *const libc::c_void } + } + + 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 { + let p = gl::wgl::GetProcAddress(addr) as *const _; + if !p.is_null() { return p; } + kernel32::GetProcAddress(self.gl_library, addr) as *const _ + } + } + + fn swap_buffers(&self) { + unsafe { + gdi32::SwapBuffers(self.hdc); + } + } + + fn get_api(&self) -> Api { + // FIXME: can be opengl es + Api::OpenGl + } + + fn get_pixel_format(&self) -> PixelFormat { + self.pixel_format.clone() + } +} + +unsafe impl Send for Context {} +unsafe impl Sync for Context {} + +unsafe fn create_context(extra: Option<(&gl::wgl_extra::Wgl, &BuilderAttribs<'static>)>, + _: winapi::HWND, hdc: winapi::HDC, 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 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 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(CreationError::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: winapi::HDC) -> Vec<(PixelFormat, libc::c_int)> { + let size_of_pxfmtdescr = mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() as u32; + let num = gdi32::DescribePixelFormat(hdc, 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, 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: winapi::HDC) + -> Vec<(PixelFormat, libc::c_int)> +{ + let get_info = |index: u32, attrib: u32| { + let mut value = mem::uninitialized(); + extra.GetPixelFormatAttribivARB(hdc as *const _, 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: winapi::HDC, id: libc::c_int) -> Result<(), CreationError> { + let mut output: winapi::PIXELFORMATDESCRIPTOR = mem::zeroed(); + + if gdi32::DescribePixelFormat(hdc, id, mem::size_of::<winapi::PIXELFORMATDESCRIPTOR>() + as winapi::UINT, &mut output) == 0 + { + return Err(CreationError::OsError(format!("DescribePixelFormat function failed: {}", + format!("{}", io::Error::last_os_error())))); + } + + if gdi32::SetPixelFormat(hdc, id, &output) == 0 { + return Err(CreationError::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(CreationError::OsError(format!("LoadLibrary function failed: {}", + format!("{}", io::Error::last_os_error())))); + } + + Ok(lib) +} + +unsafe fn is_extension_supported(extra: &gl::wgl_extra::Wgl, hdc: winapi::HDC, + extension: &str) -> bool +{ + let extensions = if extra.GetExtensionsStringARB.is_loaded() { + let data = extra.GetExtensionsStringARB(hdc 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) +} diff --git a/src/api/win32/init.rs b/src/api/win32/init.rs index e5b0b3a..9223105 100644 --- a/src/api/win32/init.rs +++ b/src/api/win32/init.rs @@ -8,37 +8,32 @@ 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 GlProfile; -use GlRequest; -use PixelFormat; -use std::ffi::{CStr, CString, OsStr}; +use std::ffi::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; + +use api::wgl::{self, Context}; /// Work-around the fact that HGLRC doesn't implement Send -pub struct ContextHack(pub winapi::HGLRC); +struct ContextHack(winapi::HGLRC); unsafe impl Send for ContextHack {} -pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<ContextHack>) +pub fn new_window(builder: BuilderAttribs<'static>, builder_sharelists: Option<winapi::HGLRC>) -> Result<Window, CreationError> { + let builder_sharelists = builder_sharelists.map(|s| ContextHack(s)); + // initializing variables to be sent to the task let title = OsStr::new(&builder.title).encode_wide().chain(Some(0).into_iter()) @@ -110,57 +105,6 @@ 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() { @@ -203,27 +147,8 @@ 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) - } else { - f - } - } 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)); + // + let context = try!(wgl::Context::new(&builder, real_window.0, builder_sharelists)); // calling SetForegroundWindow if fullscreen if builder.monitor.is_some() { @@ -248,29 +173,13 @@ 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 +241,3 @@ 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) -} diff --git a/src/api/win32/mod.rs b/src/api/win32/mod.rs index d0caea7..ff42408 100644 --- a/src/api/win32/mod.rs +++ b/src/api/win32/mod.rs @@ -3,7 +3,6 @@ use std::sync::atomic::AtomicBool; use std::mem; use std::ptr; -use std::ffi::CString; use std::ffi::OsStr; use std::os::windows::ffi::OsStrExt; use std::sync::{ @@ -25,13 +24,12 @@ pub use self::monitor::{MonitorID, get_available_monitors, get_primary_monitor}; use winapi; use user32; use kernel32; -use gdi32; + +use api::wgl; mod callback; mod event; -mod gl; mod init; -mod make_current_guard; mod monitor; /// The Win32 implementation of the main `Window` object. @@ -40,13 +38,7 @@ pub struct Window { window: WindowWrapper, /// OpenGL context. - context: ContextWrapper, - - /// Binded to `opengl32.dll`. - /// - /// `wglGetProcAddress` returns null for GL 1.1 functions because they are - /// already defined by the system. This module contains them. - gl_library: winapi::HMODULE, + context: wgl::Context, /// Receiver for the events dispatched by the window callback. events_receiver: Receiver<Event>, @@ -56,27 +48,11 @@ pub struct Window { /// The current cursor state. cursor_state: Arc<Mutex<CursorState>>, - - /// The pixel format that has been used to create this window. - pixel_format: PixelFormat, } unsafe impl Send for Window {} unsafe impl Sync for Window {} -/// A simple wrapper that destroys the context when it is destroyed. -// FIXME: remove `pub` (https://github.com/rust-lang/rust/issues/23585) -#[doc(hidden)] -pub struct ContextWrapper(pub winapi::HGLRC); - -impl Drop for ContextWrapper { - fn drop(&mut self) { - unsafe { - gl::wgl::DeleteContext(self.0 as *const libc::c_void); - } - } -} - /// A simple wrapper that destroys the window when it is destroyed. // FIXME: remove `pub` (https://github.com/rust-lang/rust/issues/23585) #[doc(hidden)] @@ -103,7 +79,7 @@ impl Window { /// See the docs in the crate root file. pub fn new(builder: BuilderAttribs) -> Result<Window, CreationError> { let (builder, sharing) = builder.extract_non_static(); - let sharing = sharing.map(|w| init::ContextHack(w.context.0)); + let sharing = sharing.map(|w| w.context.get_hglrc()); init::new_window(builder, sharing) } @@ -326,38 +302,27 @@ impl Window { impl GlContext for Window { unsafe fn make_current(&self) { - // TODO: check return value - gl::wgl::MakeCurrent(self.window.1 as *const libc::c_void, - self.context.0 as *const libc::c_void); + self.context.make_current() } fn is_current(&self) -> bool { - unsafe { gl::wgl::GetCurrentContext() == self.context.0 as *const libc::c_void } + self.context.is_current() } 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 { - let p = gl::wgl::GetProcAddress(addr) as *const _; - if !p.is_null() { return p; } - kernel32::GetProcAddress(self.gl_library, addr) as *const _ - } + self.context.get_proc_address(addr) } fn swap_buffers(&self) { - unsafe { - gdi32::SwapBuffers(self.window.1); - } + self.context.swap_buffers() } fn get_api(&self) -> Api { - Api::OpenGl + self.context.get_api() } fn get_pixel_format(&self) -> PixelFormat { - self.pixel_format.clone() + self.context.get_pixel_format() } } |