| 43 | fclose ( fp ); |
| 44 | } |
| 45 | unsigned char* readPPM ( const char* filename, int& W, int& H ) |
| 46 | { |
| 47 | FILE* fp = fopen ( filename, "rb" ); |
| 48 | if ( !fp ) |
| 49 | { |
| 50 | printf ( "Failed to open file '%s'!\n", filename ); |
| 51 | } |
| 52 | char hdr[256]={}; |
| 53 | int l=0; |
| 54 | // Read the header |
| 55 | char p,n; |
| 56 | int D; |
| 57 | while ( sscanf ( hdr, "%c%c %d %d %d", &p, &n, &W, &H, &D ) < 5 ) |
| 58 | { |
| 59 | fgets ( hdr+l, 256-l, fp ); |
| 60 | char * comment = strchr ( hdr, 'p' ); |
| 61 | if ( comment ) l = hdr - comment; |
| 62 | else l = strlen ( hdr ); |
| 63 | if ( l>=255 ) |
| 64 | { |
| 65 | W=H=0; |
| 66 | fclose ( fp ); |
| 67 | return NULL; |
| 68 | } |
| 69 | } |
| 70 | if ( p != 'P' ) |
| 71 | { |
| 72 | W=H=0; |
| 73 | fclose ( fp ); |
| 74 | return NULL; |
| 75 | } |
| 76 | unsigned char * r = new unsigned char[W*H*3]; |
| 77 | if ( n=='6' ) |
| 78 | fread ( r, 1, W*H*3, fp ); |
| 79 | else if ( n=='3' ) |
| 80 | { |
| 81 | int c; |
| 82 | for ( int i=0; i<W*H*3; i++ ) |
| 83 | { |
| 84 | fscanf ( fp, "%d", &c ); |
| 85 | r[i] = 255*c / D; |
| 86 | } |
| 87 | } |
| 88 | else |
| 89 | { |
| 90 | W=H=0; |
| 91 | fclose ( fp ); |
| 92 | return NULL; |
| 93 | } |
| 94 | fclose ( fp ); |
| 95 | return r; |
| 96 | } |
| 97 | |
| 98 | void writePPM ( const char* filename, int W, int H, unsigned char* data ) |
| 99 | { |