minimal_zgui_glfw_gl fixes

Author: hazeycode

samples/minimal_zgui_glfw_gl/src/minimal_zgui_glfw_gl.zig

@@ -36,11 +36,6 @@ pub fn main() !void {
 
     try gl.loadCoreProfile(glfw.getProcAddress, gl_major, gl_minor);
 
-    const scale_factor = scale_factor: {
-        const scale = window.getContentScale();
-        break :scale_factor @max(scale[0], scale[1]);
-    };
-
     var gpa_state = std.heap.GeneralPurposeAllocator(.{}){};
     defer _ = gpa_state.deinit();
     const gpa = gpa_state.allocator();
@@ -50,19 +45,19 @@ pub fn main() !void {
 
     _ = zgui.io.addFontFromFile(
         content_dir ++ "Roboto-Medium.ttf",
-        std.math.floor(16.0 * scale_factor),
+        std.math.floor(16.0),
     );
 
     zgui.backend.init(window);
     defer zgui.backend.deinit();
 
-    zgui.getStyle().scaleAllSizes(scale_factor);
-
     while (!window.shouldClose() and window.getKey(.escape) != .press) {
         glfw.pollEvents();
 
         gl.clearBufferfv(gl.COLOR, 0, &[_]f32{ 0, 0, 0, 1.0 });
 
+        zgui.backend.newFrame();
+
         // Set the starting window position and size to custom values
         zgui.setNextWindowPos(.{ .x = 20.0, .y = 20.0, .cond = .first_use_ever });
         zgui.setNextWindowSize(.{ .w = -1.0, .h = -1.0, .cond = .first_use_ever });
@@ -74,6 +69,8 @@ pub fn main() !void {
         }
         zgui.end();
 
+        zgui.backend.draw();
+
         window.swapBuffers();
     }
 }