glfw: add VideoMode type; add Monitor.getVideoModes

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

glfw/src/VideoMode.zig

@@ -0,0 +1,43 @@
+//! Monitor video modes and related functions
+//!
+//! see also: glfw.Monitor.getVideoMode
+
+const std = @import("std");
+const mem = std.mem;
+const testing = std.testing;
+const c = @cImport(@cInclude("GLFW/glfw3.h"));
+
+pub const Error = @import("errors.zig").Error;
+const getError = @import("errors.zig").getError;
+
+handle: *c.GLFWvidmode,
+
+/// Returns the width of the video mode, in screen coordinates.
+pub inline fn getWidth(self: VideoMode) usize {
+    return @intCast(usize, self.handle.width);
+}
+
+/// Returns the height of the video mode, in screen coordinates.
+pub inline fn getHeight(self: VideoMode) usize {
+    return @intCast(usize, self.handle.height);
+}
+
+/// Returns the bit depth of the red channel of the video mode.
+pub inline fn getRedBits(self: VideoMode) usize {
+    return @intCast(usize, self.handle.redBits);
+}
+
+/// Returns the bit depth of the green channel of the video mode.
+pub inline fn getGreenBits(self: VideoMode) usize {
+    return @intCast(usize, self.handle.greenBits);
+}
+
+/// Returns the bit depth of the blue channel of the video mode.
+pub inline fn getBlueBits(self: VideoMode) usize {
+    return @intCast(usize, self.handle.blueBits);
+}
+
+/// Returns the refresh rate of the video mode, in Hz.
+pub inline fn getRefreshRate(self: VideoMode) usize {
+    return @intCast(usize, self.handle.refreshRate);
+}