1 files changed, 37 insertions, 4 deletions
diff --git a/src/glfw_impl.zig b/src/glfw_impl.zig
index 8bfbec2..dffd7bf 100644
--- a/src/glfw_impl.zig
+++ b/src/glfw_impl.zig
@@ -4,9 +4,9 @@ const debug = @import("std").debug;
 const math = @import("std").math;
 
 pub const ClientApi = enum {
-    Unknown,
-    OpenGL,
-    Vulkan,
+  Unknown,
+  OpenGL,
+  Vulkan,
 };
 
 // Data
@@ -145,7 +145,40 @@ pub fn NewFrame() void {
 }
 
 fn UpdateMonitors() void {
-  // @TODO
+  const platform_io = c.igGetPlatformIO();
+  var monitors_count : c_int = 0;
+  const glfw_monitors = c.glfwGetMonitors(&monitors_count)[0..@intCast(usize, monitors_count)];
+
+  c.ImVector_ImGuiPlatformMonitor_Resize(&platform_io.*.Monitors, monitors_count);
+  for (glfw_monitors) |glfw_monitor, n| {
+    var monitor = &platform_io.*.Monitors.Data[n];
+    var x : c_int = undefined;
+    var y : c_int = undefined;
+    c.glfwGetMonitorPos(glfw_monitor, &x, &y);
+    const vid_mode = c.glfwGetVideoMode(glfw_monitor); // glfw_monitors[n]);
+
+    monitor.*.MainPos = c.ImVec2{ .x = @intToFloat(f32, x), .y = @intToFloat(f32, y) };
+    monitor.*.MainSize = c.ImVec2{
+      .x = @intToFloat(f32, vid_mode.*.width),
+      .y = @intToFloat(f32, vid_mode.*.height),
+    };
+    if (false and c.GLFW_HAS_MONITOR_WORK_AREA) {
+      var w : c_int = undefined;
+      var h : c_int = undefined;
+      c.glfwGetMonitorWorkarea(glfw_monitor, &x, &y, &w, &h);
+      monitor.*.WorkPos = ImVec2{ .x = @intToFloat(f32, x), .y = @intToFloat(f32, y) };
+      monitor.*.WorkSize = ImVec2{ .x = @intToFloat(f32, w), .y = @intToFloat(f32, h) };
+    }
+    if (false and c.GLFW_HAS_PER_MONITOR_DPI) {
+      // Warning: the validity of monitor DPI information on Windows depends on the application DPI awareness settings,
+      // which generally needs to be set in the manifest or at runtime.
+      var x_scale : f32 = undefined;
+      var y_scale : f32 = undefined;
+      c.glfwGetMonitorContentScale(glfw_monitor, &x_scale, &y_scale);
+      monitor.*.DpiScale = x_scale;
+    }
+  }
+  g_WantUpdateMonitors = false;
 }
 
 fn UpdateMousePosAndButtons() void {