Move src/modules/main -> src/kernel

src/kernel/screen.h

@@ -0,0 +1,40 @@
+#pragma once
+#include <stddef.h>
+#include <stdint.h>
+
+#include "util.h"
+
+class screen
+{
+public:
+	using pixel_t = uint32_t;
+
+	screen(
+		void *framebuffer,
+		unsigned hres, unsigned vres,
+		pixel_t rmask, pixel_t gmask, pixel_t bmask);
+
+	screen(const screen &other);
+
+	unsigned width() const { return m_resolution.x; }
+	unsigned height() const { return m_resolution.y; }
+
+	pixel_t color(uint8_t r, uint8_t g, uint8_t b) const;
+
+	void fill(pixel_t color);
+	void draw_pixel(unsigned x, unsigned y, pixel_t color);
+
+	screen() = delete;
+
+private:
+	struct color_masks {
+		uint8_t rshift, gshift, bshift;
+		pixel_t r, g, b;
+		color_masks(pixel_t r, pixel_t g, pixel_t b);
+		color_masks(const color_masks &other);
+	};
+
+	pixel_t *m_framebuffer;
+	color_masks m_masks;
+	coord<unsigned> m_resolution;
+};