diff options
Diffstat (limited to 'contrib/gdevbjca.c')
| -rw-r--r-- | contrib/gdevbjca.c | 40 |
1 files changed, 26 insertions, 14 deletions
diff --git a/contrib/gdevbjca.c b/contrib/gdevbjca.c index a023f0ee..142ddee4 100644 --- a/contrib/gdevbjca.c +++ b/contrib/gdevbjca.c @@ -342,12 +342,14 @@ bjc_compress(const byte *row, uint raster, byte *compressed) register byte test, test2; test = *exam; - while ( exam < end_row ) { - test2 = *++exam; + while ( ++exam < end_row ) { + test2 = *exam; if ( test == test2 ) break; test = test2; } + /* exam points to the byte that didn't match, or end_row + * if we ran out of data. */ /* Find out how long the run is */ end_dis = exam - 1; @@ -464,7 +466,11 @@ uint bjc_rand(gx_device_bjc_printer *dev) void bjc_init_tresh(gx_device_bjc_printer *dev, int rnd) { +#ifdef CLUSTER + int i=0; +#else int i=(int)(time(NULL) & 0x0ff); +#endif float delta=40.64*rnd; for(;i>0;i--) bjc_rand(dev); for(i=-512; i<512; i++) dev->bjc_treshold[i+512] = @@ -655,12 +661,15 @@ FloydSteinbergDitheringC(gx_device_bjc_printer *dev, for( i=width; i>0; i--, row+=4, err_vect+=3) { /*separate components */ /* C + K */ - err_corrC = dev->bjc_gamma_tableC[ (*row) + (*(row+3))] - + dev->FloydSteinbergC; - err_corrM = dev->bjc_gamma_tableM[(*(row+1)) + (*(row+3))] - + dev->FloydSteinbergM; - err_corrY = dev->bjc_gamma_tableY[(*(row+2)) + (*(row+3))] - + dev->FloydSteinbergY; + int v = row[0] + row[3]; + if (v > 255) v = 255; + err_corrC = dev->bjc_gamma_tableC[v] + dev->FloydSteinbergC; + v = row[1] + row[3]; + if (v > 255) v = 255; + err_corrM = dev->bjc_gamma_tableM[v] + dev->FloydSteinbergM; + v = row[2] + row[3]; + if (v > 255) v = 255; + err_corrY = dev->bjc_gamma_tableY[v] + dev->FloydSteinbergY; if(err_corrC > 4080 && limit_extr) err_corrC = 4080; if(err_corrM > 4080 && limit_extr) err_corrM = 4080; @@ -751,12 +760,15 @@ FloydSteinbergDitheringC(gx_device_bjc_printer *dev, for( i=width; i>0; i--, row-=4, err_vect-=3) { - err_corrC = dev->bjc_gamma_tableC[ (*row) + (*(row+3))] - + dev->FloydSteinbergC; - err_corrM = dev->bjc_gamma_tableM[(*(row+1)) + (*(row+3))] - + dev->FloydSteinbergM; - err_corrY = dev->bjc_gamma_tableY[(*(row+2)) + (*(row+3))] - + dev->FloydSteinbergY; + int v = row[0] + row[3]; + if (v > 255) v = 255; + err_corrC = dev->bjc_gamma_tableC[v] + dev->FloydSteinbergC; + v = row[1] + row[3]; + if (v > 255) v = 255; + err_corrM = dev->bjc_gamma_tableM[v] + dev->FloydSteinbergM; + v = row[2] + row[3]; + if (v > 255) v = 255; + err_corrY = dev->bjc_gamma_tableY[v] + dev->FloydSteinbergY; if(err_corrC > 4080 && limit_extr) err_corrC = 4080; if(err_corrM > 4080 && limit_extr) err_corrM = 4080; |