diff options
| author | Ralph Giles <ralph.giles@artifex.com> | 2009-01-23 22:53:02 +0000 |
|---|---|---|
| committer | Ralph Giles <ralph.giles@artifex.com> | 2009-01-23 22:53:02 +0000 |
| commit | 6fbb3c865458725c6a28580f022a5e10e336a31b (patch) | |
| tree | 94ea2d9c7b45ad8b1746b7f98c538dd4827af178 /gs/contrib | |
| parent | f03210242f0e47b8829db8bc8d300a41353c602c (diff) | |
Convert 24 bit RGB data to grayscale when printing in monochrome with
eplaser device. Previously the RGB data was sent as is, resulting in
a stretched and truncated page image.
Patch from Olaf Meeuwissen. Bug 690252.
git-svn-id: http://svn.ghostscript.com/ghostscript/trunk@9391 a1074d23-0009-0410-80fe-cf8c14f379e6
Diffstat (limited to 'gs/contrib')
| -rw-r--r-- | gs/contrib/eplaser/gdevescv.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/gs/contrib/eplaser/gdevescv.c b/gs/contrib/eplaser/gdevescv.c index 8333e8154..c17dfd115 100644 --- a/gs/contrib/eplaser/gdevescv.c +++ b/gs/contrib/eplaser/gdevescv.c @@ -2941,6 +2941,9 @@ static void escv_write_data(gx_device *dev, int bits, char *buf, int bsize, int char obuf[128]; int size; char *tmps, *p; + unsigned char *rgbbuf; + unsigned char *ucp; + double gray8; if( 0 == pdev->colormode ) { /* ESC/Page (Monochrome) */ @@ -2966,6 +2969,23 @@ static void escv_write_data(gx_device *dev, int bits, char *buf, int bsize, int buf = tmps; } + if(bits == 24) { /* 8bit RGB */ + tmps = gs_alloc_bytes(vdev->memory, bsize / 3, "escv_write_data(tmp)"); + + /* convert 24bit RGB to 8bit Grayscale */ + rgbbuf = buf; + ucp = tmps; + for (size = 0; size < bsize; size = size + 3) { + gray8 = (0.299L * rgbbuf[size]) + (0.587L * rgbbuf[size + 1]) + (0.114L * rgbbuf[size + 2]); + if ( gray8 > 255L ) + *ucp = 255; + else + *ucp = gray8; + ucp++; + } + bsize = bsize / 3; + buf = tmps; + } if(bits == 1){ if (strcmp(pdev->dname, "lp1800") == 0 || \ @@ -2981,7 +3001,7 @@ static void escv_write_data(gx_device *dev, int bits, char *buf, int bsize, int put_bytes(s, buf, bsize); - if (bits == 12 || bits == 4) { + if (bits == 12 || bits == 4 || bits == 24) { gs_free_object(vdev->memory, tmps, "escv_write_data(tmp)"); } |