implement renderer

1 files changed, 31 insertions, 0 deletions

diff --git a/lib/nes/app/graphics/image-view.hh b/lib/nes/app/graphics/image-view.hh
new file mode 100644
index 0000000..a9b8e94
--- /dev/null
+++ b/lib/nes/app/graphics/image-view.hh
@@ -0,0 +1,31 @@
+#pragma once
+
+namespace nes::app
+{
+	struct image_tile;
+
+	/// Non-owning copy of a 2-dimensional block of image tiles, forming an image.
+	///
+	/// This is similar in spirit to a string_view, but for image tiles.
+	class image_view
+	{
+		image_tile const* data_{ nullptr };
+		unsigned width_{ 0 };
+		unsigned height_{ 0 };
+
+	public:
+		explicit image_view() = default;
+
+		explicit image_view(image_tile const* data, unsigned const width, unsigned const height)
+			: data_{ data }
+			, width_{ width }
+			, height_{ height }
+		{
+		}
+
+		auto get_data() const -> image_tile const* { return data_; }
+		auto get_width() const -> unsigned { return width_; }
+		auto get_height() const -> unsigned { return height_; }
+		auto get(unsigned const x, unsigned const y) const -> image_tile const& { return data_[y * height_ + x]; }
+	};
+} // namespace nes::app
\ No newline at end of file