Skip to content

Instantly share code, notes, and snippets.

View xiaozhuai's full-sized avatar

Weihang Ding xiaozhuai

56 followers · 12 following
  • Shanghai, China
  • 01:06 (UTC +08:00)
View GitHub Profile
@xiaozhuai
xiaozhuai / x11_art.c
Last active December 18, 2024 08:46
X11 Art
/**
*
* Compile on Linux with:
* gcc x11_art.c -o x11_art -O3 -lX11
*
* Compile on MacOS with:
* gcc x11_art.c -o x11_art -O3 -lX11 -I/opt/X11/include -L/opt/X11/lib
*
*/
@xiaozhuai
xiaozhuai / HumanReadableSize.js
Last active March 8, 2023 03:36
Get a human readabe size
function toHumanReadableSize(bytes, precision = 1) {
if (typeof bytes !== 'number' || isNaN(bytes) || !isFinite(bytes)) return '-';
const units = ['bytes', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB', 'BB'];
let num = bytes;
let unit = 0;
if (bytes !== 0) {
unit = Math.floor(Math.log(bytes) / Math.log(1024));
num = bytes / Math.pow(1024, Math.floor(unit));
}
if (unit === 0) {
@xiaozhuai
xiaozhuai / .clang-format
Last active May 22, 2024 11:49
My .clang-format
# You can dump builtin base style by following command
# clang-format --style=Google --dump-config > .clang-format
BasedOnStyle: 'Google'
AlignConsecutiveMacros:
Enabled: true
AcrossEmptyLines: true
AcrossComments: true
AlignCompound: false
@xiaozhuai
xiaozhuai / backtrace.cpp
Created April 22, 2021 10:45
Android native c++ get back trace (stacktrace)
#include <tinyformat.h>
#include <unwind.h>
#include <cxxabi.h>
#include <dlfcn.h>
struct android_backtrace_state {
void **current;
void **end;
};
@xiaozhuai
xiaozhuai / pi_alpine_ds3231.md
Last active September 7, 2023 13:31
Raspberry pi + Alpine + ds3231

Install the RTC module on GPIO pins 1, 3, 5, 7

  1. Add or edit usercfg.txt and add
dtparam=i2c_arm=on
dtoverlay=i2c-rtc,ds3231
  1. Edit /etc/mkinitfs/mkinitfs.conf and add a feature rpirtc, then rebuild initramfs



  


  




    


          
    

      

        
        

          

              @xiaozhuai
          

          

            
                xiaozhuai
                / GL_REPEAT-and-GL_MIRRORED_REPEAT-in-shader.md
            
            

              Last active
              July 21, 2022 04:27
            

              
                Simplely implement GL_REPEAT & GL_MIRRORED_REPEAT in shader
              
          

        

      

        

  

      

    


OpenGL ES for iOS requires Power-of-Two images, unfortunately, as it is a rather strict implementation.


NPOT textures are technically enabled in the newer iOS hardware running 2.0 ES, but with extremely limited use.


Specifically, you must use linear filtering with clamp-to-edge, and no mipmapping.


And also GL_REPEAT & GL_MIRRORED_REPEAT are not supported.


In most cases a power-of-two image would still be more efficient/have higher framerates.





  


  




    


          
    

      

        
        

          

              @xiaozhuai
          

          

            
                xiaozhuai
                / fix_parallels_tools_install.md
            
            

              Last active
              April 16, 2023 09:00
            

              
                fix parallels tools install issue
              
          

        

      

        

  

      

    
install log


cd prl_fs/SharedFolders/Guest/Linux/prl_fs && make CC=cc
make[1]: Entering directory '/usr/lib/parallels-tools/kmods/prl_fs/SharedFolders/Guest/Linux/prl_fs'
make -C /lib/modules/5.0.0-25-generic/build M=/usr/lib/parallels-tools/kmods/prl_fs/SharedFolders/Guest/Linux/prl_fs CC=cc
make[2]: Entering directory '/usr/src/linux-headers-5.0.0-25-generic'
  CC [M]  /usr/lib/parallels-tools/kmods/prl_fs/SharedFolders/Guest/Linux/prl_fs/super.o
/usr/lib/parallels-tools/kmods/prl_fs/SharedFolders/Guest/Linux/prl_fs/super.c: In function 'prlfs_remount':
/usr/lib/parallels-tools/kmods/prl_fs/SharedFolders/Guest/Linux/prl_fs/super.c:119:21: error: 'MS_RDONLY' undeclared (first use in this function); did you mean 'IS_RDONLY'?
  if ( (!((*flags) & MS_RDONLY) && PRLFS_SB(sb)->readonly) ||




  


  




    


          
    

      

        
        

          

              @xiaozhuai
          

          

            
                xiaozhuai
                / TAR.bt
            
            

              Last active
              September 13, 2021 08:21
            

              
                010 editor tar template
              
          

        

      

        

  

    
    


        



  


  

        

          
          //--------------------------------------
        

        

          
          //--- 010 Editor v6.0.2 Binary Template
        

        

          
          //
        

        

          
          //      File: TAR.bt
        

        

          
          //    Author: xiaozhuai
        

        

          
          //   Version: 1.0
        

        

          
          //   Purpose: Read tar files.
        

        

          
          //  Category: Archive
        

        

          
          // File Mask: *.tar
        

        

          
          //--------------------------------------