identify -list format

   Format  Mode  Description
-------------------------------------------------------------------------------
        A* rw+   Raw alpha samples
       AI  rw-   Adobe Illustrator CS2
      ART* rw-   PFS: 1st Publisher Clip Art
      ARW  r--   Sony Alpha Raw Image Format
      AVI* r--   Microsoft Audio/Visual Interleaved
      AVS* rw+   AVS X image
        B* rw+   Raw blue samples
      BGR* rw+   Raw blue, green, and red samples
      BMP* rw-   Microsoft Windows bitmap image
     BMP2* -w-   Microsoft Windows bitmap image v2
     BMP3* -w-   Microsoft Windows bitmap image v3
      BRG* rw+   Raw blue, red, and green samples
        C* rw+   Raw cyan samples
  CAPTION* r--   Image caption
      CIN* rw+   Cineon Image File
      CIP* -w-   Cisco IP phone image format
     CLIP* -w+   Image Clip Mask
     CMYK* rw+   Raw cyan, magenta, yellow, and black samples
    CMYKA* rw+   Raw cyan, magenta, yellow, black, and alpha samples
      CR2  r--   Canon Digital Camera Raw Image Format
      CRW  r--   Canon Digital Camera Raw Image Format
      CUR* rw-   Microsoft icon
      CUT* r--   DR Halo
      DCM* r--   Digital Imaging and Communications in Medicine image
           DICOM is used by the medical community for images like X-rays.  The
           specification, "Digital Imaging and Communications in Medicine
           (DICOM)", is available at http://medical.nema.org/.  In particular,
           see part 5 which describes the image encoding (RLE, JPEG, JPEG-LS),
           and supplement 61 which adds JPEG-2000 encoding.
      DCR  r--   Kodak Digital Camera Raw Image File
      DCX* rw+   ZSoft IBM PC multi-page Paintbrush
      DDS* r--   Microsoft DirectDraw Surface
    DFONT* r--   Multi-face font package (Freetype 2.3.9)
      DNG  r--   Digital Negative
      DPX* rw-   SMPTE 268M-2003 (DPX 2.0)
           Digital Moving Picture Exchange Bitmap, Version 2.0.
           See SMPTE 268M-2003 specification at http://www.smtpe.org
           
     EPDF  rw-   Encapsulated Portable Document Format
      EPI  rw-   Encapsulated PostScript Interchange format
      EPS  rw-   Encapsulated PostScript
     EPS2* -w-   Level II Encapsulated PostScript
     EPS3* -w+   Level III Encapsulated PostScript
     EPSF  rw-   Encapsulated PostScript
     EPSI  rw-   Encapsulated PostScript Interchange format
      EPT  rw-   Encapsulated PostScript with TIFF preview
     EPT2  rw-   Encapsulated PostScript Level II with TIFF preview
     EPT3  rw+   Encapsulated PostScript Level III with TIFF preview
      ERF  r--   Epson RAW Format
      FAX* rw+   Group 3 FAX
           FAX machines use non-square pixels which are 1.5 times wider than they
           are tall but computer displays use square pixels, therefore FAX images
           may appear to be narrow unless they are explicitly resized using a
           geometry of "150x100%".
           
     FITS* rw-   Flexible Image Transport System
  FRACTAL* r--   Plasma fractal image
      FTS* rw-   Flexible Image Transport System
        G* rw+   Raw green samples
       G3* rw-   Group 3 FAX
      GBR* rw+   Raw green, blue, and red samples
      GIF* rw+   CompuServe graphics interchange format
    GIF87* rw-   CompuServe graphics interchange format (version 87a)
 GRADIENT* r--   Gradual linear passing from one shade to another
     GRAY* rw+   Raw gray samples
      GRB* rw+   Raw green, red, and blue samples
HISTOGRAM* -w-   Histogram of the image
      HRZ* rw-   Slow Scan TeleVision
      HTM* -w-   Hypertext Markup Language and a client-side image map
     HTML* -w-   Hypertext Markup Language and a client-side image map
      ICB* rw+   Truevision Targa image
      ICO* rw+   Microsoft icon
     ICON* rw-   Microsoft icon
     INFO  -w+   The image format and characteristics
   INLINE* r--   Base64-encoded inline images
      IPL* rw+   IPL Image Sequence
      JNG* rw-   JPEG Network Graphics
           See http://www.libpng.org/pub/mng/ for details about the JNG
           format.
     JPEG* rw-   Joint Photographic Experts Group JFIF format (70)
      JPG* rw-   Joint Photographic Experts Group JFIF format (70)
        K* rw+   Raw black samples
      K25  r--   Kodak Digital Camera Raw Image Format
      KDC  r--   Kodak Digital Camera Raw Image Format
    LABEL* r--   Image label
        M* rw+   Raw magenta samples
      M2V  rw+   MPEG Video Stream
      M4V  rw+   Raw MPEG-4 Video
      MAP* rw-   Colormap intensities and indices
      MAT  rw+   MATLAB image format
    MATTE* -w+   MATTE format
     MIFF* rw+   Magick Image File Format
      MNG* rw+   Multiple-image Network Graphics (libpng 1.2.35)
           See http://www.libpng.org/pub/mng/ for details about the MNG
           format.
     MONO* rw-   Raw bi-level bitmap
      MOV  rw+   MPEG Video Stream
      MP4  rw+   MPEG-4 Video Stream
      MPC* rw+   Magick Persistent Cache image format
     MPEG  rw+   MPEG Video Stream
      MPG  rw+   MPEG Video Stream
      MRW  r--   Sony (Minolta) Raw Image File
      MSL* rw+   Magick Scripting Language
     MSVG  rw+   ImageMagick's own SVG internal renderer
      MTV* rw+   MTV Raytracing image format
      MVG* rw-   Magick Vector Graphics
      NEF  r--   Nikon Digital SLR Camera Raw Image File
     NULL* rw-   Constant image of uniform color
        O* rw+   Raw opacity samples
      ORF  r--   Olympus Digital Camera Raw Image File
      OTB* rw-   On-the-air bitmap
      OTF* r--   Open Type font (Freetype 2.3.9)
      PAL* rw-   16bit/pixel interleaved YUV
     PALM* rw+   Palm pixmap
      PAM* rw+   Common 2-dimensional bitmap format
  PATTERN* r--   Predefined pattern
      PBM* rw+   Portable bitmap format (black and white)
      PCD* rw-   Photo CD
     PCDS* rw-   Photo CD
      PCL  rw+   Printer Control Language
      PCT* rw-   Apple Macintosh QuickDraw/PICT
      PCX* rw-   ZSoft IBM PC Paintbrush
      PDB* rw+   Palm Database ImageViewer Format
      PDF  rw+   Portable Document Format
     PDFA  rw+   Portable Document Archive Format
      PEF  r--   Pentax Electronic File
      PFA* r--   Postscript Type 1 font (ASCII) (Freetype 2.3.9)
      PFB* r--   Postscript Type 1 font (binary) (Freetype 2.3.9)
      PFM* rw+   Portable float format
      PGM* rw+   Portable graymap format (gray scale)
    PICON* rw-   Personal Icon
     PICT* rw-   Apple Macintosh QuickDraw/PICT
      PIX* r--   Alias/Wavefront RLE image format
    PJPEG* rw-   Joint Photographic Experts Group JFIF format (70)
   PLASMA* r--   Plasma fractal image
      PNG* rw-   Portable Network Graphics (libpng 1.2.35)
           See http://www.libpng.org/ for details about the PNG format.
    PNG24* rw-   opaque 24-bit RGB (zlib 1.2.3)
    PNG32* rw-   opaque or transparent 32-bit RGBA
     PNG8* rw-   8-bit indexed with optional binary transparency
      PNM* rw+   Portable anymap
      PPM* rw+   Portable pixmap format (color)
  PREVIEW* -w-   Show a preview an image enhancement, effect, or f/x
       PS  rw+   PostScript
      PS2* -w+   Level II PostScript
      PS3* -w+   Level III PostScript
      PSD* rw+   Adobe Photoshop bitmap
     PTIF* rw+   Pyramid encoded TIFF
      PWP* r--   Seattle Film Works
        R* rw+   Raw red samples
RADIAL-GRADIENT* r--   Gradual radial passing from one shade to another
      RAF  r--   Fuji CCD-RAW Graphic File
      RAS* rw+   SUN Rasterfile
      RBG* rw+   Raw red, blue, and green samples
      RGB* rw+   Raw red, green, and blue samples
     RGBA* rw+   Raw red, green, blue, and alpha samples
     RGBO* rw+   Raw red, green, blue, and opacity samples
      RLA* r--   Alias/Wavefront image
      RLE* r--   Utah Run length encoded image
      SCR* r--   ZX-Spectrum SCREEN$
      SCT* r--   Scitex HandShake
      SFW* r--   Seattle Film Works
      SGI* rw+   Irix RGB image
    SHTML* -w-   Hypertext Markup Language and a client-side image map
      SR2  r--   Sony Raw Format 2
      SRF  r--   Sony Raw Format
  STEGANO* r--   Steganographic image
      SUN* rw+   SUN Rasterfile
      SVG  rw+   Scalable Vector Graphics (XML 2.7.3)
     SVGZ  rw+   Compressed Scalable Vector Graphics (XML 2.7.3)
     TEXT* rw-   Text
      TGA* rw+   Truevision Targa image
THUMBNAIL* -w+   EXIF Profile Thumbnail
     TIFF* rw+   Tagged Image File Format (LIBTIFF, Version 3.8.2)
   TIFF64* ---   Tagged Image File Format (64-bit) (LIBTIFF, Version 3.8.2)
     TILE* r--   Tile image with a texture
      TIM* r--   PSX TIM
      TTC* r--   TrueType font collection (Freetype 2.3.9)
      TTF* r--   TrueType font (Freetype 2.3.9)
      TXT* rw-   Text
      UIL* -w-   X-Motif UIL table
     UYVY* rw-   16bit/pixel interleaved YUV
      VDA* rw+   Truevision Targa image
    VICAR* rw-   VICAR rasterfile format
      VID* rw+   Visual Image Directory
     VIFF* rw+   Khoros Visualization image
      VST* rw+   Truevision Targa image
     WBMP* rw-   Wireless Bitmap (level 0) image
      WMV  rw+   Windows Media Video
      WPG* r--   Word Perfect Graphics
        X* rw+   X Image
      X3F  r--   Sigma Camera RAW Picture File
      XBM* rw-   X Windows system bitmap (black and white)
       XC* r--   Constant image uniform color
      XCF* r--   GIMP image
      XPM* rw-   X Windows system pixmap (color)
      XPS  r--   Microsoft XML Paper Specification
       XV* rw+   Khoros Visualization image
      XWD* rw-   X Windows system window dump (color)
        Y* rw+   Raw yellow samples
    YCbCr* rw+   Raw Y, Cb, and Cr samples
   YCbCrA* rw+   Raw Y, Cb, Cr, and alpha samples
      YUV* rw-   CCIR 601 4:1:1 or 4:2:2

* native blob support
r read support
w write support
+ support for multiple images

imagemagick.rb

require 'brewkit'

# some credit to http://github.com/maddox/magick-installer

class Imagemagick <Formula
  @url='ftp://ftp.imagemagick.org:21//pub/ImageMagick/ImageMagick-6.5.6-1.tar.bz2'
  @md5='e74cc971e0e6dbf14e498fceba86a33a'
  @homepage='http://www.imagemagick.org'

  depends_on 'jpeg'
  depends_on 'libwmf' => :optional
  depends_on 'libtiff' => :optional
  depends_on 'little-cms' => :optional
  depends_on 'ghostscript' => :recommended

  def install
    ENV.libpng
    ENV.deparallelize

    # TODO eventually these will be external optional dependencies
    # but for now I am lazy
    Libtiff.new.brew do
      system "./configure", "--prefix=#{prefix}", "--disable-debug"
      system "make install"
    end
    Libwmf.new.brew do
      system "./configure", "--prefix=#{prefix}", "--disable-debug"
      system "make install"
    end
    LittleCMS.new.brew do
      system "./configure", "--prefix=#{prefix}", "--disable-debug"
      system "make install"
    end
    Ghostscript.new.brew do
      # ghostscript configure ignores LDFLAGs apparently
      ENV['LIBS']="-L/usr/X11/lib"
      system "./configure", "--prefix=#{prefix}", "--disable-debug",
                            # the cups component adamantly installs to /usr so fuck it
                            "--disable-cups"
      # versioned stuff in main tree is pointless for us
      inreplace 'Makefile', '/$(GS_DOT_VERSION)', ''
      system "make install"
      (prefix+'share'+'ghostscript'+'doc').rmtree
    end
    GhostscriptFonts.new.brew do
      Dir.chdir '..'
      (prefix+'share'+'ghostscript').install 'fonts'
    end

    # versioned stuff in main tree is pointless for us
    inreplace 'configure', '${PACKAGE_NAME}-${PACKAGE_VERSION}', '${PACKAGE_NAME}'

    # we need imagemagick to know about the libraries we just installed
    system "brew ln imagemagick"

    system "./configure", "--disable-static",
                          "--with-modules",
                          "--without-magick-plus-plus",
                          "--disable-dependency-tracking",
                          "--disable-shared",
                          "--without-maximum-compile-warnings",
                          "--prefix=#{prefix}",
                          "--disable-osx-universal-binary",
                          "--with-gs-font-dir=#{HOMEBREW_PREFIX}/share/ghostscript/fonts",
                          "--without-perl" # I couldn't make this compile
    system "make install"
  end

  def caveats
    "I'm not a heavy user of ImageMagick, so please check everything is installed with" +
    "  identify -list format"
  end
end