implement in-game popups

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/nes/app/ui/screen-freeze.hh b/lib/nes/app/ui/screen-freeze.hh
new file mode 100644
index 0000000..fe67aad
--- /dev/null
+++ b/lib/nes/app/ui/screen-freeze.hh
@@ -0,0 +1,25 @@
+#pragma once
+
+#include "nes/app/ui/screen.hh"
+#include "nes/common/rgb.hh"
+#include "nes/common/display.hh"
+
+namespace nes::app
+{
+	/// Freeze screen which preserves the display buffer at a certain state.
+	///
+	/// This is usually used to preserve the image from the console when the game should not continue.
+	class screen_freeze final : public screen
+	{
+		rgb frozen_data_[display::width * display::height]{};
+
+	public:
+		explicit screen_freeze() = default;
+
+		auto render(renderer&) -> void override;
+		auto process_events() -> action override;
+
+		/// Update the image shown to the back buffer of the given display.
+		auto freeze(display const&) -> void;
+	};
+} // namespace nes::app
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