蛋疼一:
framebuffer里面frame尺寸和屏幕显示尺寸不一致
解决:
int bpp = vinfo.bits_per_pixel/8;
int tmpStrip = finfo.line_length/bpp;
蛋疼二:
framebuffer里面双缓冲,起始位置不固定
解决:
offset = vinfo.xoffset * vinfo.bits_per_pixel / 8;
offset += vinfo.xres * vinfo.yoffset * vinfo.bits_per_pixel / 8;
lseek(fp, offset, SEEK_SET);
蛋疼三:
有些手机不按常理出牌,fb_var_screeninfo里面放的信息和点阵信息对不上
解决:
//work around for strange format
if(vinfo.transp.offset==0)
{
for (y = 0; y < vinfo.yres; y++) {
for (x = 0; x < vinfo.xres; x++) {
c = (char*)(tmpBuf + x + (y * tmpStrip));
*(buf + i) = *(c + 0);
*(buf + i + 1) = *(c + 1);
*(buf + i + 2) = *(c + 2);
*(buf + i + 3) = 0xff;
i+=4;
}
}
}