kolibrios/programs/media/imgview/formats/pcx.cpp

55 lines
1.3 KiB
C++
Raw Normal View History

#include "..\kosSyst.h"
#include "pcx.h"
int PCXFile::LoadPCXFile(Byte* filebuff, Dword filesize)
{
memcpy((Byte*)&Pcx_head,(Byte*)filebuff,sizeof(PCXHeader));
int state=0;
if (Pcx_head.bManufacturer==0x0a && Pcx_head.bVersion==0x05)
{
width=Pcx_head.dwWidth-Pcx_head.dwX+1;
height=Pcx_head.dwHeight-Pcx_head.dwY+1;
buffer=kos_GetMemory(width*height*3);
Byte* pPal=filebuff+filesize-768;
Byte* pImg=filebuff+128;
Byte* cBuffer=(Byte*)buffer;
if (Pcx_head.bNPlanes==1)
{
/* 8-bit decoding */
Dword y,i;
Byte cur_byte,counter;
Dword cWidth;
for(y=0;y<height;y++)
{
cWidth=width;
while(cWidth!=0)
{
cur_byte=*(pImg); pImg++;
counter=1;
if (cur_byte>=192)
{
counter=(cur_byte & 0x3F);
cur_byte=*(pImg); pImg++;
}
for(i=0;i<counter;i++)
{
*(cBuffer+0)=(pPal[cur_byte*3+0]);
*(cBuffer+1)=(pPal[cur_byte*3+1]);
*(cBuffer+2)=(pPal[cur_byte*3+2]);
cBuffer=cBuffer+3;
cWidth--;
}
}
}
} else if (Pcx_head.bNPlanes==3) {
/* 24-bit decoding */
state=1;
}
} else {
state=1;
}
return state;
}