diff options
Diffstat (limited to 'gs/base/gdevdflt.c')
| -rw-r--r-- | gs/base/gdevdflt.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gs/base/gdevdflt.c b/gs/base/gdevdflt.c index 6ac0410ba..057264b14 100644 --- a/gs/base/gdevdflt.c +++ b/gs/base/gdevdflt.c @@ -934,6 +934,26 @@ gx_default_dev_spec_op(gx_device *pdev, int dev_spec_op, void *data, int size) return (pdev->procs.fill_path == gx_default_fill_path); case gxdso_is_std_cmyk_1bit: return (pdev->procs.map_cmyk_color == cmyk_1bit_map_cmyk_color); + case gxdso_interpolate_antidropout: + if ((pdev->color_info.num_components == 1 && + pdev->color_info.max_gray < 15) || + (pdev->color_info.num_components > 1 && + pdev->color_info.max_color < 15)) { + /* If we are are limited color device (i.e. we are halftoning) + * then use the antidropout interpolators. */ + return 1; + } + return 0; + case gxdso_interpolate_threshold: + if ((pdev->color_info.num_components == 1 && + pdev->color_info.max_gray < 15) || + (pdev->color_info.num_components > 1 && + pdev->color_info.max_color < 15)) { + /* If we are a limited color device (i.e. we are halftoning) + * then only interpolate if we are upscaling by at least 4 */ + return 4; + } + return 0; /* Otherwise no change */ } return gs_error_undefined; } |