41 lines
1.3 KiB
C++
41 lines
1.3 KiB
C++
#pragma once
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#include "Rectangle.h"
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#include "Color.h"
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#include "Drawable.h"
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#include <iostream>
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#include <linux/fb.h>
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namespace qing{
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/* FIXME: 这个类的绘制点方法可能过于复杂 */
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class FrameBuf: public Drawable { /* 帧缓冲区类 */
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public:
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FrameBuf(const char *path, int rotate, int fontsize);
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FrameBuf(const FrameBuf&) = delete; /* 持有fd */
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~FrameBuf();
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int get_bpp(); /* bits_per_pixel 像素比特 */
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virtual Color _get(int x, int y) override;
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virtual void _p(int x, int y, Color &color) override;
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virtual void flush(Drawable *d, bool border = false) override;
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void clear(); /* FIXME: 也许把这个方法加到抽象父类中？ */
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class UnknowBPP: std::runtime_error { /* 未知标准的像素比特 */
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public:
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UnknowBPP(): std::runtime_error("Unknow the number of Bits Per Pixel.") {}
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};
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static const int _HEAD_LEN = 8;
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private:
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int d = -1;
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struct fb_var_screeninfo var_info; /* 可变参数 */
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struct fb_fix_screeninfo fix_info; /* 固定参数 */
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int x_over = 0; /* 横轴过量 */
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int line_jump = 0; /* 行跳 */
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char *buf = nullptr; /* 缓冲区指针 */
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/* 根据像素比特的不同分情况讨论 */
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Color get16(__u32 x, __u32 y);
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Color get32(__u32 x, __u32 y);
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void p32(__u32 x, __u32 y, Color &color);
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void p16(__u32 x, __u32 y, Color &color);
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};
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}
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