#pragma once
#include <stddef.h>
#include <stdint.h>

class screen
{
public:
	using pixel_t = uint32_t;

	enum class pixel_order : uint8_t { bgr8, rgb8, };

	screen(volatile void *addr, unsigned hres, unsigned vres, unsigned scanline, pixel_order order);

	unsigned width() const { return m_resx; }
	unsigned height() const { return m_resy; }

	pixel_t color(uint8_t r, uint8_t g, uint8_t b) const;

	void fill(pixel_t color);

	inline void draw_pixel(unsigned x, unsigned y, pixel_t color) {
		const size_t index = x + y * m_scanline;
		m_back[index] = color;
	}

	void update();

private:
	volatile pixel_t *m_fb;
	pixel_t *m_back;
	pixel_order m_order;
	unsigned m_scanline;
	unsigned m_resx, m_resy;

	screen() = delete;
};