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glfw: add Window.setOpacity

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
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Stephen Gutekanst 2021-07-25 19:38:06 -07:00
parent 14f4e4aaf2
commit c11a82c211
1 changed files with 22 additions and 0 deletions
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22
glfw/src/Window.zig
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@ -593,6 +593,28 @@ pub inline fn getOpacity(self: Window) Error!f32 {
return opacity; return opacity;
} }
/// Sets the opacity of the whole window.
///
/// This function sets the opacity of the window, including any decorations.
///
/// The opacity (or alpha) value is a positive finite number between zero and one, where zero is
/// fully transparent and one is fully opaque.
///
/// The initial opacity value for newly created windows is one.
///
/// A window created with framebuffer transparency may not use whole window transparency. The
/// results of doing this are undefined.
///
/// Possible errors include glfw.Error.NotInitialized and glfw.Error.PlatformError.
///
/// @thread_safety This function must only be called from the main thread.
///
/// see also: window_transparency, glfw.Window.getOpacity
pub inline fn setOpacity(self: Window, opacity: f32) Error!void {
c.glfwSetWindowOpacity(self.handle, opacity);
try getError();
}
test "defaultHints" { test "defaultHints" {
const glfw = @import("main.zig"); const glfw = @import("main.zig");
try glfw.init(); try glfw.init();