senderle

So you want to modify the text of a PDF by hand...

If you, like me, resent every dollar spent on commercial PDF tools, you might want to know how to change the text content of a PDF without having to pay for Adobe Acrobat or another PDF tool. I didn't see an obvious open-source tool that lets you dig into PDF internals, but I did discover a few useful facts about how PDFs are structured that I think may prove useful to others (or myself) in the future. They are recorded here. They are surely not universally applicable --
the PDF standard is truly Byzantine -- but they worked for my case.

dondragmer

Buffer<uint> Input;
RWBuffer<uint> Output;

//returns the index that this value should be moved to to sort the array
uint CuteSort(uint value, uint laneIndex)
{
    uint smallerValuesMask = 0;
    uint equalValuesMask = ~0;
    
    //don't need to test every bit if your value is constrained to a smaller range