int main(int argc, char **argv)
{
imageFilename = (argc > 1) ? argv[1] : "butterflies.ppm";
initGL(argc, argv);
initCL();
input = (cl_uint*)malloc(sizeof(unsigned int) * rows * cols);
output = (cl_uint*)malloc(sizeof(unsigned int) * rows * cols);
// Read the image
if (!parse_ppm(imageFilename.c_str(), cols, rows, (unsigned char *)input)) {
std::cerr << "Error: could not load " << argv[1] << std::endl;
teardown();
}
std::cout << "Commands:" << std::endl;
std::cout << " <space> Toggle filter on or off" << std::endl;
std::cout << " -" << std::endl
<< " Reduce filter threshold" << std::endl;
std::cout << " +" << std::endl
<< " Increase filter threshold" << std::endl;
std::cout << " =" << std::endl
<< " Reset filter threshold to default" << std::endl;
std::cout << " q/<enter>/<esc>" << std::endl
<< " Quit the program" << std::endl;
glutMainLoop();
teardown(0);
}
unsigned char* Heightfield::read_ppm( const char* filename ) {
FILE *stream = fopen( filename, "rb" );
if( stream == NULL ) {
printf( "Heightfield::read_ppm ERR: fopen '%s' FAILED\n", filename );
return( NULL );
}
unsigned char* buff = parse_ppm( stream );
fclose( stream );
return( buff );
}
/**
* im_ppm2vips:
* @filename: file to load
* @out: image to write to
*
* Read a PPM/PBM/PGM/PFM file into a VIPS image.
* It can read 1, 8, 16 and 32 bit images, colour or monochrome,
* stored in binary or in ASCII. One bit images become 8 bit VIPS images,
* with 0 and 255 for 0 and 1.
*
* PFM images have the scale factor attached as "pfm-scale".
*
* See also: #VipsFormat, im_vips2ppm(), im_meta_get_double()
*
* Returns: 0 on success, -1 on error.
*/
int
im_ppm2vips( const char *filename, IMAGE *out )
{
FILE *fp;
/* Note that we open in binary mode. If this is a binary PPM, we need
* to be able to mmap it.
*/
if( !(fp = im__file_open_read( filename, NULL, FALSE )) )
return( -1 );
if( parse_ppm( fp, filename, out ) ) {
fclose( fp );
return( -1 );
}
fclose( fp );
return( 0 );
}
