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C Data Type Q&A » byte » shift 

1. convert 24bit RGB to ARGB16    stackoverflow.com

i am reading a 24bpp bitmap , and i need to convert each pixel from RGB24 to ARGB16. i am using this : 

#define ARGB16(a, r, g, b) ( ((a) << 15) ...

2. C bits shifting short ints    stackoverflow.com

Why result of 

include <stdio.h>
int main()
{
    unsigned short int i = 0xff ;
    unsigned short int j;
    j= i<<2;
    ...

3. After byte shifitng a int to 4 bytes, how can I shift back to int (C)    stackoverflow.com

So I byte shift a integer into 4 bytes of data. 

img[4] = (imagewidth >> 24) & 0xFF;
img[5] = (imagewidth >> 16) & 0xFF;
img[6] = (imagewidth >> 8) & 0xFF;
img[7] = imagewidth ...
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