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glfw: add Window.setContentScaleCallback

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
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Stephen Gutekanst 2021-10-18 00:58:18 -07:00 • committed by Stephen Gutekanst
parent 5dc41a130a
commit a98e437bcd
1 changed files with 54 additions and 18 deletions
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72
src/Window.zig
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@ -44,6 +44,7 @@ pub const InternalUserPointer = struct {
setIconifyCallback: ?fn (window: Window, iconified: bool) void,
setMaximizeCallback: ?fn (window: Window, maximized: bool) void,
setFramebufferSizeCallback: ?fn (window: Window, width: isize, height: isize) void,
setContentScaleCallback: ?fn (window: Window, xscale: f32, yscale: f32) void,
};
/// Resets all window hints to their default values.
@ -1262,25 +1263,38 @@ pub inline fn setFramebufferSizeCallback(self: Window, callback: ?fn (window: Wi
getError() catch {};
}
// TODO(window):
fn setContentScaleCallbackWrapper(handle: ?*c.GLFWwindow, xscale: f32, yscale: f32) callconv(.C) void {
const window = from(handle.?) catch unreachable;
const internal = window.getInternal();
internal.setContentScaleCallback.?(window, xscale, yscale);
}
// /// Sets the window content scale callback for the specified window.
// ///
// /// This function sets the window content scale callback of the specified window,
// /// which is called when the content scale of the specified window changes.
// ///
// /// @param[in] window The window whose callback to set.
// /// @param[in] callback The new callback, or null to remove the currently set
// /// callback.
// ///
// /// @callback_param `window` the window whose content scale changed.
// /// @callback_param `xscale` the new x-axis content scale of the window.
// /// @callback_param `yscale` the new y-axis content scale of the window.
// ///
// /// @thread_safety This function must only be called from the main thread.
// ///
// /// see also: window_scale, glfw.Window.getContentScale
// GLFWAPI GLFWwindowcontentscalefun glfwSetWindowContentScaleCallback(GLFWwindow* window, GLFWwindowcontentscalefun callback);
/// Sets the window content scale callback for the specified window.
///
/// This function sets the window content scale callback of the specified window,
/// which is called when the content scale of the specified window changes.
///
/// @param[in] window The window whose callback to set.
/// @param[in] callback The new callback, or null to remove the currently set
/// callback.
///
/// @callback_param `window` the window whose content scale changed.
/// @callback_param `xscale` the new x-axis content scale of the window.
/// @callback_param `yscale` the new y-axis content scale of the window.
///
/// @thread_safety This function must only be called from the main thread.
///
/// see also: window_scale, glfw.Window.getContentScale
pub inline fn setContentScaleCallback(self: Window, callback: ?fn (window: Window, xscale: f32, yscale: f32) void) void {
var internal = self.getInternal();
internal.setContentScaleCallback = callback;
_ = c.glfwSetWindowContentScaleCallback(self.handle, if (callback != null) setContentScaleCallbackWrapper else null);
// The only error this could return would be glfw.Error.NotInitialized, which should
// definitely have occurred before calls to this. Returning an error here makes the API
// awkward to use, so we discard it instead.
getError() catch {};
}
test "defaultHints" {
const glfw = @import("main.zig");
@ -1992,3 +2006,25 @@ test "setFramebufferSizeCallback" {
}
}).callback);
}
test "setContentScaleCallback" {
const glfw = @import("main.zig");
try glfw.init();
defer glfw.terminate();
const window = glfw.Window.create(640, 480, "Hello, Zig!", null, null) catch |err| {
// return without fail, because most of our CI environments are headless / we cannot open
// windows on them.
std.debug.print("note: failed to create window: {}\n", .{err});
return;
};
defer window.destroy();
window.setContentScaleCallback((struct {
fn callback(_window: Window, xscale: f32, yscale: f32) void {
_ = _window;
_ = xscale;
_ = yscale;
}
}).callback);
}