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如何直接写入linux framebuffer?

linux

如何直接写入linux framebuffer?


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2020-06-07

共1个答案

小编典典

看看FBIOPUT_VSCREENINFO,ioctl和mmap

(我有代码,但没有此电脑,对不起)

编辑:这应该让您开始

  //open file descriptor and get info
inf fdScreen = open( "devicename", O_RDWR );
fb_var_screeninfo varInfo;
ioctl( fdScreen, FBIOGET_VSCREENINFO, &varInfo );

  //set resolution/dpi/color depth/.. in varInfo, then write it back
ioctl( fdScreen, FBIOPUT_VSCREENINFO, &varInfo );

  //get writable screen memory; unsigned short here for 16bit color
unsigned short* display = mmap( 0, nScreenSize,
                                PROT_READ | PROT_WRITE, MAP_SHARED, fdScreen, 0 );
2020-06-07