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lowercasing filenames, part3

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@576 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz 2008-08-28 12:36:57 +00:00
parent d158df697d
commit 1cfc5cc4ce
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108
Pico/utils.c
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@ -1,108 +0,0 @@
// This is part of Pico Library
// (c) Copyright 2004 Dave, All rights reserved.
// (c) Copyright 2006 notaz, All rights reserved.
// Free for non-commercial use.
// For commercial use, separate licencing terms must be obtained.
#include "pico_int.h"
int PicuAnd=0xf7de;
// Quick low-quality conversion of 320 to 176:
int PicuQuick(unsigned short *dest,unsigned short *src)
{
unsigned short *end=NULL;
src+=13; end=src+290;
dest++;
do
{
*dest++=*src++;
*dest++=*src; src+=2;
*dest++=*src; src+=2;
*dest++=*src++;
*dest++=*src; src+=2;
*dest++=*src; src+=2;
}
while (src<end);
return 0;
}
// Shrink the pixels in src/srcLen, to the screen line pointed to by dest/destLen
int PicuShrink(unsigned short *dest,int destLen,unsigned short *src,int srcLen)
{
unsigned short *end=NULL;
int bias=0,pa=0,sub=0;
end=dest+destLen;
sub=srcLen-destLen;
do
{
pa=*src++; bias-=sub;
if (bias<0) { pa+=*src++; pa>>=1; bias+=destLen; }
*dest++=(unsigned short)pa;
pa=*src++; bias-=sub;
if (bias<0) { pa+=*src++; pa>>=1; bias+=destLen; }
*dest++=(unsigned short)pa;
}
while (dest<end);
return 0;
}
// same thing, only reversed (dest is in pre-decremental mode)
int PicuShrinkReverse(unsigned short *dest,int destLen,unsigned short *src,int srcLen)
{
unsigned short *end=NULL;
int bias=0,pa=0,sub=0;
end=dest-destLen;
sub=srcLen-destLen;
do
{
pa=*src++; bias-=sub;
if (bias<0) { pa+=*src++; pa>>=1; bias+=destLen; }
*(--dest)=(unsigned short)pa;
pa=*src++; bias-=sub;
if (bias<0) { pa+=*src++; pa>>=1; bias+=destLen; }
*(--dest)=(unsigned short)pa;
}
while (dest>end);
return 0;
}
int PicuMerge(unsigned short *dest,int destLen,unsigned short *src,int srcLen)
{
unsigned short *end=NULL;
int bias=0,pa=0,mask=PicuAnd,sub=0;
end=dest+destLen;
sub=srcLen-destLen;
do
{
pa=*src++; bias-=sub;
if (bias<0) { pa+=*src++; pa>>=1; bias+=destLen; }
pa&=mask; pa+=(*dest)&mask; pa>>=1;
*dest++=(unsigned short)pa;
pa=*src++; bias-=sub;
if (bias<0) { pa+=*src++; pa>>=1; bias+=destLen; }
pa&=mask; pa+=(*dest)&mask; pa>>=1;
*dest++=(unsigned short)pa;
}
while (dest<end);
return 0;
}