572fade7ff
This is mostly cleanup after fighting the double buffering bug - bring back rep stosl for screen fill, and move draw_pixel to be an inline function.
37 lines
728 B
C++
37 lines
728 B
C++
#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;
|
|
};
|