/usr/include/plib/pcx.h is in libplib-dev 1.8.5-7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 | // Loading of the PCX texture file format
//
// This file is used for both PLIB and for BoB.
//
// Written by Wolfram Kuss in december 2003
//
// This file is published as public domain
struct pcxHeaderType
{
char manufacturer; // always 10
char version; // usually 5
char encoding; // 1 = RLE
char bitsPerPixel; // number of bits to represent a pixel
short x, y; // upper left coordinates
short xmax, ymax;
short hDPI, vDPI; // DPI
char egaPalette[48]; // obsolete
char reserved; // unused, always 0
char nColorPlanes; // number of color planes. not implemented yet?
short bytesPerLine; // bytes per scan line. not implemented yet? todo kludge
short paletteInfo; // colored or grey scale. not implemented yet?
short hScreenSize, cScreenSize;
char padding[54]; // reserved, always 0
};
#define READ_BYTE (buffer[0]); buffer++;
#define READ_SHORT ((((unsigned long)buffer[0])<<8) + buffer[1]); buffer += 2;
#define READ_LONG ((((unsigned long)buffer[0])<<24) + (((unsigned long)buffer[1])<<16) + (((unsigned long)buffer[2])<<8) + buffer[3]); buffer += 4;
// It is bad style to have a function inside a header file, but this way there is only one file
// I need to "synchronise" between PLIB and BoB.
static int ReadPCXBody(UByte*& buffer, pcxHeaderType *ppcxHeader, UByte * pBody)
// returns TRUE on success.
// reads from buffer (which will normally just hold the file contents, but in memory,
// writes to pBody, which must have been allocated
{
unsigned short x,y;
if ((ppcxHeader->bitsPerPixel != 8) // unsupported pcx
|| (ppcxHeader->encoding>1) // invalid PCX
// || (pcxHeader.nColorPlanes != 1) // unsupported pcx
|| (ppcxHeader->manufacturer != 10)) // invalid pcx
return (FALSE);
unsigned short width = ppcxHeader->xmax-ppcxHeader->x+1;
x=0; y=0; // upper left coordinates
for(;;)
{
UByte color = READ_BYTE;
if ((color &0xC0) != 0xC0) // uncompressed?
{
*pBody++ = color;
x++;
if (x >= width)
{ x=0; y++; // next line
if(y > ppcxHeader->ymax-ppcxHeader->y)
break;
}
}
else
{
UByte counter, length = color & 0x3F; // number of times next byte repeated
color = READ_BYTE;
for (counter=0; counter<length; counter++)
{
*pBody++ = color;
x++;
if (x >= width)
{ x=0; y++; // next line
counter=length;
if(y > ppcxHeader->ymax-ppcxHeader->y)
break; // breaks for (counter=0; counte...
}
}
if(y > ppcxHeader->ymax-ppcxHeader->y)
break; // breaks for(;;)
}
}
return TRUE;
}
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