diff options
Diffstat (limited to 'graphics/fbm/pkg/DESCR')
| -rw-r--r-- | graphics/fbm/pkg/DESCR | 67 |
1 files changed, 19 insertions, 48 deletions
diff --git a/graphics/fbm/pkg/DESCR b/graphics/fbm/pkg/DESCR index 9cb2fd595ef..50008bfd84b 100644 --- a/graphics/fbm/pkg/DESCR +++ b/graphics/fbm/pkg/DESCR @@ -1,51 +1,22 @@ -This collection provides a complete package for manipulating and -converting color and black and whites images, including 24bit RGB, 8bit -mapped color, 8bit grayscale, and 1bit bitmapped images. +The Fuzzy BitMap tools. (Adapted directly from the FreeBSD Ports +system.) - clr2gray Convert color to grayscale - fbcat Copy image (used for format conversion) - fbclean Flip isolated pixels (clean image) - fbconv Arbitrary convolutions - fbedge Compute derivative image (edge detection) - fbext Extract region, resize, change aspect ratio - fbgamma Gamma correct grayscale or color image for display - fbhalf Halftone grayscale image (Blue noise, Floyd-Steinberg, etc) - fbham Convert FBM 24bit RGB to Amiga HAM mode - fbhist Compute histogram - fbinfo Dump image header - fbm2pod Convert grayscale image to Diablo graphics (!) - fbm2tga Convert image to Targa format - fbm2tiff Convert FBM files to 1, 2, 4, 8, or 24 bit TIFF - fbmask Set region to gray value - fbmedian Median filter 3x3 regios - fbnorm Normalize image intensity / increase contrast - fbpalet Replace an imager's colormap with another, remove duplicates - fbps Convert to PostScript - fbquant Color quantization (24 bit to 8..256 colors) Mod. Heckbert - fbrot Rotate 90, 180, or 270 degrees - fbthin Thin 1bit images - fbsample Sample a 1bit file to produce an 8bit file - fbsharp Sharpen (edge enhancement) by digital Laplacian - gray2clr Add a "gray" colormap to a grayscale image - idiff (and udiff) convert raw byte stream into byte difference - pbm2ps Convert PBM file to PostScript - pbmtitle Add a title to a PBM file - raw2fbm Convert raw file to FBM format (eg: Amiga Digiview files) - tga2fbm Convert Targa file to FBM format - tiff2fbm Convert tiff file to FBM format - uunet2fbm Convert UseNet Facesaver file to FBM format +This package provides a set of UNIX filter commands which perform +image-processing steps, and can read and write multiple formats. +A NOP filter, fbcat, can be used to perform format conversions. Similar +to netpbm or urt. The key reason that I wanted fbm is because fbm can +deal with IFF FORM ILBM files, while other tools at my disposal cannot. -File Formats +Two caveats: - FBM (-F) FBM file with 256 byte header (with title & credits) - Sun (-S) Sun rasterfile with 32 byte header - Tiff (-T) Aldus TIFF - PBM (-P) Poskanzer format for 1bit files - GIF (-G) CompuServe GIF format - JPG (-J) JPEG JFIF format (cf The Independent JPEG Group) - RLE (-R) Utah RLE format - IFF (-I) Amiga IFF files (except HAM mode files) - PCX (-Z) PC PaintBrush format for IBM - Face (-B) Bennet Yee's 1bit files, used at CMU -___________ -From the README file +I left in FreeBSD patches that keep fbm from using standard graphics +libraries. If, like me, you only use fbm to import an odd file or two, +then uninstall, then you might appreciate not needing to install +various graphics libraries. + +There seems to be some buggy code for emitting ILBM's. IFF requires +that all chunks be padded to 16-bit boundaries; this also applies to +each scanline of each bitplane in FORM ILBM. It appears that fbcat +(at least) fails to properly handle this padding on at least one +case of reading or writing ILBM files. (This isn't a problem if +the ILBM width is a multiple of 16.) |