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//
//
// This tool will read ARToolKit pattern files (with variable size) and save
// them as Portable Pixmap (.ppm) files.
//
// Usage: PATT_to_PPM [infilename] [outfilename] [width] [height]
//
//
// Thanks to Antonio Bleile for contributing the PPM writer code
//
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
char
skipSpaces(FILE* fp)
{
char ch = ' ';
while( ch==' ' && !feof(fp))
ch = fgetc(fp);
return ch;
}
bool
readNumber(FILE* fp, char* buffer, int maxLen)
{
char ch = 0;
int i=0;
do {
ch = fgetc(fp);
if(ch>='0' && ch<='9')
buffer[i++] = ch;
} while(!feof(fp) && i<maxLen-1 && ch!=' ');
buffer[i++] = 0;
return i<maxLen && !feof(fp);
}
bool
writePPM( const char *fileName, unsigned char *data, int width, int height )
{
FILE *file = fopen( fileName, "wb" );
if( !file ){
printf( "Could not open file %s for writing\n", fileName );
return false;
}
// error checking omitted
fprintf( file, "P6\n# generated by patt_to_ppm\n%d %d\n255\n", width, height );
fwrite( data, width*height*3, 1, file );
fclose( file );
return true;
}
unsigned char *
readMarkerFile(const char* nFileName, int nMarkerWidth, int nMarkerHeight)
{
FILE* fp = fopen(nFileName, "r");
if(!fp)
return NULL;
const int strMax = 256, numPix = nMarkerWidth*nMarkerHeight;
unsigned char* pixels24 = new unsigned char[numPix*3];
char str[strMax+1];
int x,y,channel;
for(channel=0; channel<3; channel++)
for(y=0; y<nMarkerHeight; y++)
{
for(x=0; x<nMarkerWidth; x++)
{
str[0] = skipSpaces(fp);
readNumber(fp, str+1, strMax);
int value = atoi(str);
int offset = 3*(x + y*nMarkerWidth) + channel;
assert(offset < numPix*3);
pixels24[offset] = value;
}
}
fclose(fp);
return pixels24;
}
int main(int argc, char** argv)
{
unsigned char *patternImage;
int width = 16, height = 16;
if(argc<3)
{
printf("ERROR: to few parameters\n");
printf("Usage: %s infilename outfilename [width=16] [height=16]\n", argv[0] );
printf("Example: %s patt.hiro patt_hiro.ppm 32 32\n", argv[0] );
return -1;
}
const char *inName = argv[1],
*outName = argv[2];
if( argc >= 4 )
width = atoi( argv[3] );
if( argc >= 5 )
height = atoi( argv[4] );
patternImage = readMarkerFile(inName, width,height);
if( patternImage )
writePPM( outName, patternImage, width, height );
return 0;
}
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