Floyd-Steinberg Dithering

[Kas Ob.]

@Stevie, nice !

I was going to more generic reusable one like this:

Code:

{$ALIGN 16}
procedure TestCMovShort;
const
  LOWER_LIMIT = 0;
  HIGHER_LIMIT = 255;
asm
        mov     esi, HIGHER_LIMIT          // High Limit
        mov     ecx, Count
        db      $48, $48

@1:     mov     edi, 0
        db      $48, $48, $48

@2:     mov     edx, dword[Data + edi * 4]
        mov     eax, LOWER_LIMIT
        //XOR     eax, eax     // eax is destination value filled with the lowest value
        cmp     edx, esi     // comapare v (edx) with high value
        cmovg   eax, esi     // if bigger then take the highest esi
        cmovbe  eax, edx     // if below or equal we fill value v (edx)
        mov     Byte[CData + edi], al
        inc     edi
        cmp     edi, DATA_LEN
        jl      @2
        dec     ecx
        jne     @1
end;

But it is little slower than xor , and for sure slower then using cmovae and cmovge.