DSTYLE(5)							File Formats Manual							 DSTYLE(5)

NAME

       dstyle - format of .dstyle files (display styles)

DESCRIPTION

       Display	styles	indicate  how  to render information on a screen.  Each style describes one way of rendering information, for example as a
       solid area in red or as a dotted outline in purple.  Different styles correspond to mask layers, highlights, labels, menus, window borders,
       and so on.  See ``Magic Maintainer's Manual #3: Display Styles, Color Maps, and Glyphs'' for more information on how the styles are used.

       Dstyle  files  usually have names of the form x.y.dstylen, where x is a class of technologies, y is a class of displays, and n is a version
       number (currently 5).  The version number may increase in the future if the format of dstyle files changes.  For example, the display style
       file  mos.7bit.dstyle5 provides all the rendering information for our nMOS and CMOS technologies for color displays with at least 7 bits of
       color.

       Dstyle files are stored in ASCII as a series of lines.  Lines beginning with ``#'' are considered to be comments and are ignored.  The rest
       of the lines of the file are divided up into two sections separated by blank lines.  There should not be any blank lines within a section.

DISPLAY_STYLES SECTION
       The  first section begins with a line display_styles planes where planes is the number of bits of color information per pixel on the screen
       (between 1 and 8).  Each line after that describes one display style and contains eight fields separated by white  space:  style  writeMask
       color outline fill stipple shortName longName The meanings of the fields are:

       style  The number of this style, in decimal.  Styles 1 through 64 are used to display mask layers in the edit cell.  The style number(s) to
	      use for each mask layer is (are) specified in the technology file.  Styles 65-128 are used for displaying mask  layers  in  non-edit
	      cells.   If style x is used for a mask layer in the edit cell, style x+64 is used for the same mask layer in non-edit cells.  Styles
	      above 128 are used by the Magic code for various things like menus and highlights.  See the file styles.h in Magic  for  how  styles
	      above  128 are used.  When redisplaying, the styles are drawn in order starting at 1, so the order of styles may affect what appears
	      on the screen.

       writeMask
	      This is an octal number specifying which bit-planes are to be modified when this style is  rendered.   For  example,  1  means  only
	      information in bit-plane 0 will be affected, and 377 means all eight bit-planes are affected.

       color  An octal number specifying the new values to be written into the bit-planes that are modified.  This is used along with writeMask to
	      determine the new value of each pixel that's being modified: newPixel = (oldPixel & ~writeMask)  |  (color  &  writeMask)  The  red,
	      green, and blue intensities displayed for each pixel are not deterimined directly by the value of the pixel;  they come from a color
	      map that maps the eight-bit pixel values into red, green, and blue intensities.  Color maps are stored in separate files.

       outline
	      If this field is zero, then no outline is drawn.	If the field is non-zero, it specifies that outlines are to be	drawn  around  the
	      rectangular areas rendered in this style, and the octal value gives an eight-bit pattern telling how to draw the outline.  For exam-
	      ple, 377 means to draw a solid line, 252 means to draw a dotted line, 360 specifies long dashes, etc.   This  field  only  indicates
	      which pixels will be modified:  the writeMask and color fields indicate how the pixels are modified.

       fill   This is a text string specifying how the areas drawn in this style should be filled.  It must have one of the values solid, stipple,
	      cross, outline, grid.  Solid means that every pixel in the area is to modified according to writeMask and color.	Stipple means that
	      the area should be stippled:  the stipple pattern given by stipple is used to determine which pixels in the area are to be modified.
	      Cross means that an X is drawn in a solid line between the diagonally-opposite corners of the area being	rendered.   Outline  means
	      that  the  area  should  not be filled at all;  only an outline is drawn (if specified by outline).  Grid is a special style used to
	      draw a grid in the line style given by outline.  The styles cross and stipple may be supplemented with an outline by giving  a  non-
	      zero  outline  field.  The outline and grid styles don't make sense without an an outline, and solid doesn't make sense with an out-
	      line (since all the pixels are modified anyway).

       stipple
	      Used when fill is stipple to specify (in decimal) the stipple number to use.

       shortName
	      This is a one-character name for this style.  These names are used in the specification of glyphs and also in a few  places  in  the
	      Magic source code.  Most styles have no short name;  use a ``-'' in this field for them.

       longName
	      A more human-readable name for the style.  It's not used at all by Magic.

STIPPLES SECTION

       The second section of a dstyle file is separated from the first by a blank line.  The first line of the second section must be stipples and
       each additional line specifies one stipple pattern with the syntax number pattern name Number is a decimal number used to name the  stipple
       in  the	stipple  fields  of  style lines.  Number must be no less than 1 and must be no greater than a device-dependent upper limit.  Most
       devices support at least 15 stipple patterns.  Pattern consists of eight octal numbers, each from 0-377 and separated by white space.   The
       numbers	form an 8-by-8 array of bits indicating which pixels are to be modified when the stipple is used.  The name field is just a human-
       readable description of the stipple;  it isn't used by Magic.

FILES

       ~cad/lib/magic/sys/mos.7bit.dstyle5

SEE ALSO

       magic(1), cmap(5), glyphs(5)

4th Berkeley Distribution														 DSTYLE(5)