如何直接写入linux framebuffer?
最佳答案
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 );