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-rw-r--r--examples/transparent.rs38
-rw-r--r--src/api/win32/callback.rs1
-rw-r--r--src/api/win32/init.rs23
-rw-r--r--src/lib.rs6
-rw-r--r--src/window.rs14
5 files changed, 80 insertions, 2 deletions
diff --git a/examples/transparent.rs b/examples/transparent.rs
new file mode 100644
index 0000000..553c16d
--- /dev/null
+++ b/examples/transparent.rs
@@ -0,0 +1,38 @@
+#[cfg(target_os = "android")]
+#[macro_use]
+extern crate android_glue;
+
+extern crate glutin;
+
+mod support;
+
+#[cfg(target_os = "android")]
+android_start!(main);
+
+#[cfg(not(feature = "window"))]
+fn main() { println!("This example requires glutin to be compiled with the `window` feature"); }
+
+#[cfg(feature = "window")]
+fn resize_callback(width: u32, height: u32) {
+ println!("Window resized to {}x{}", width, height);
+}
+
+#[cfg(feature = "window")]
+fn main() {
+ let mut window = glutin::WindowBuilder::new().with_decorations(false).with_transparency(true)
+ .build().unwrap();
+ window.set_title("A fantastic window!");
+ window.set_window_resize_callback(Some(resize_callback as fn(u32, u32)));
+ unsafe { window.make_current() };
+
+ println!("Pixel format of the window: {:?}", window.get_pixel_format());
+
+ let context = support::load(&window);
+
+ while !window.is_closed() {
+ context.draw_frame((0.0, 0.0, 0.0, 0.0));
+ window.swap_buffers();
+
+ println!("{:?}", window.wait_events().next());
+ }
+}
diff --git a/src/api/win32/callback.rs b/src/api/win32/callback.rs
index 1ea95a5..86d5f1c 100644
--- a/src/api/win32/callback.rs
+++ b/src/api/win32/callback.rs
@@ -44,6 +44,7 @@ fn send_event(input_window: winapi::HWND, event: Event) {
/// This is the callback that is called by `DispatchMessage` in the events loop.
///
/// Returning 0 tells the Win32 API that the message has been processed.
+// FIXME: detect WM_DWMCOMPOSITIONCHANGED and call DwmEnableBlurBehindWindow if necessary
pub unsafe extern "system" fn callback(window: winapi::HWND, msg: winapi::UINT,
wparam: winapi::WPARAM, lparam: winapi::LPARAM)
-> winapi::LRESULT
diff --git a/src/api/win32/init.rs b/src/api/win32/init.rs
index fb4e181..1252354 100644
--- a/src/api/win32/init.rs
+++ b/src/api/win32/init.rs
@@ -102,7 +102,7 @@ unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>,
}
// computing the style and extended style of the window
- let (ex_style, style) = if builder.monitor.is_some() {
+ let (ex_style, style) = if builder.monitor.is_some() || builder.decorations == false {
(winapi::WS_EX_APPWINDOW, winapi::WS_POPUP | winapi::WS_CLIPSIBLINGS | winapi::WS_CLIPCHILDREN)
} else {
(winapi::WS_EX_APPWINDOW | winapi::WS_EX_WINDOWEDGE,
@@ -214,6 +214,27 @@ unsafe fn init(title: Vec<u16>, builder: BuilderAttribs<'static>,
}
};
+ // making the window transparent
+ if builder.transparent {
+ let bb = winapi::DWM_BLURBEHIND {
+ dwFlags: 0x1, // FIXME: DWM_BB_ENABLE;
+ fEnable: 1,
+ hRgnBlur: ptr::null_mut(),
+ fTransitionOnMaximized: 0,
+ };
+
+ let dll = kernel32::LoadLibraryA(b"dwmapi.dll\0".as_ptr() as *const _);
+ if !dll.is_null() {
+ let pr = kernel32::GetProcAddress(dll, b"DwmEnableBlurBehindWindow\0".as_ptr() as *const _);
+ if !pr.is_null() {
+ let pr: unsafe extern "system" fn(winapi::HWND, *const winapi::DWM_BLURBEHIND)
+ -> winapi::HRESULT = mem::transmute(pr);
+ pr(real_window.0, &bb);
+ }
+ kernel32::FreeLibrary(dll);
+ }
+ }
+
// calling SetForegroundWindow if fullscreen
if builder.monitor.is_some() {
user32::SetForegroundWindow(real_window.0);
diff --git a/src/lib.rs b/src/lib.rs
index 1169513..d2aaf46 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -295,6 +295,8 @@ pub struct BuilderAttribs<'a> {
alpha_bits: Option<u8>,
stereoscopy: bool,
srgb: Option<bool>,
+ transparent: bool,
+ decorations: bool,
}
impl BuilderAttribs<'static> {
@@ -318,6 +320,8 @@ impl BuilderAttribs<'static> {
alpha_bits: None,
stereoscopy: false,
srgb: None,
+ transparent: false,
+ decorations: true,
}
}
}
@@ -346,6 +350,8 @@ impl<'a> BuilderAttribs<'a> {
alpha_bits: self.alpha_bits,
stereoscopy: self.stereoscopy,
srgb: self.srgb,
+ transparent: self.transparent,
+ decorations: self.decorations,
};
(new_attribs, sharing)
diff --git a/src/window.rs b/src/window.rs
index c21b82d..578c237 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -137,10 +137,22 @@ impl<'a> WindowBuilder<'a> {
self
}
+ /// Sets whether the background of the window should be transparent.
+ pub fn with_transparency(mut self, transparent: bool) -> WindowBuilder<'a> {
+ self.attribs.transparent = transparent;
+ self
+ }
+
+ /// Sets whether the window should have a border, a title bar, etc.
+ pub fn with_decorations(mut self, decorations: bool) -> WindowBuilder<'a> {
+ self.attribs.decorations = decorations;
+ self
+ }
+
/// Builds the window.
///
/// Error should be very rare and only occur in case of permission denied, incompatible system,
- /// out of memory, etc.
+ /// out of memory, etc.
pub fn build(mut self) -> Result<Window, CreationError> {
// resizing the window to the dimensions of the monitor when fullscreen
if self.attribs.dimensions.is_none() && self.attribs.monitor.is_some() {