Переход на CpuRenderEngine

src/main.zig

@@ -33,7 +33,6 @@ pub fn main() !void {
     defer ctx.deinit();
 
     var interrupted = false;
-
     main_loop: while (true) {
         // beginWait coordinates with waitTime below to run frames only when needed
         const nstime = win.beginWait(interrupted);
@@ -89,12 +88,12 @@ fn gui_frame(ctx: *WindowContext) bool {
     var left_panel = dvui.box(@src(), .{ .dir = .vertical }, .{ .expand = .vertical, .min_size_content = .{ .w = 200 }, .background = true });
     {
         dvui.label(@src(), "Tools", .{}, .{});
-        if (dvui.button(@src(), "Fill Random Color", .{}, .{})) {
+        if (dvui.button(@src(), "Fill Random Color", .{}, .{}) or ctx.frame_index == 0) {
             canvas.exampleReset() catch |err| {
                 std.debug.print("Error filling canvas: {}\n", .{err});
             };
-            canvas.pos = .{ .x = 400, .y = 400 };
-            canvas.setZoom(dvui.windowNaturalScale());
+            ctx.canvas.pos = .{ .x = 400, .y = 400 };
+            ctx.canvas.setZoom(dvui.windowNaturalScale());
         }
         if (dvui.checkbox(@src(), &canvas.native_scaling, "Scaling", .{})) {}
     }
@@ -222,5 +221,7 @@ fn gui_frame(ctx: *WindowContext) bool {
     }
     back.deinit();
 
+    ctx.frame_index += 1;
+
     return true;
 }