pxl.h

Macros

BITS_PER_BYTE     X
BITS_PER_LONG     X
BITS_PER_SHORT    X
BYTES_PER_LONG    X
BYTES_PER_SHORT   X
MAXCHARS          X
ROP_CLEAR         X
ROP_COPY          X
ROP_COPYREV       X
ROP_ERASE         X
ROP_FILL          X
ROP_PAINT         X
ROUNDUP           X
SHORTS_PER_LONG   X

struct's

bitmap            X
font              X
glyph             X

   1: /*
   2:  *	Written by Eric C. Cooper, CMU
   3:  *
   4:  */
   5: /* $Header: pxl.h,v 10.5 86/02/01 15:45:03 tony Rel $ */
   6: 
   7: #define BITS_PER_LONG 32
   8: #define BITS_PER_SHORT 16
   9: #define BITS_PER_BYTE 8
  10: 
  11: #define BYTES_PER_LONG (BITS_PER_LONG/BITS_PER_BYTE)
  12: #define BYTES_PER_SHORT (BITS_PER_SHORT/BITS_PER_BYTE)
  13: 
  14: #define SHORTS_PER_LONG (BITS_PER_LONG/BITS_PER_SHORT)
  15: 
  16: #define ROUNDUP(x,y) (((x)+(y)-1)/(y))
  17: 
  18: /*
  19:  * Raster ops.
  20:  */
  21: #define ROP_CLEAR   0
  22: #define ROP_ERASE   2
  23: #define ROP_COPYREV 3
  24: #define ROP_COPY    12
  25: #define ROP_PAINT   14
  26: #define ROP_FILL    15
  27: 
  28: /*
  29:  * Bitmap structure for raster ops.
  30:  */
  31: struct bitmap{
  32:     short h, w;     /* height and width in pixels */
  33:     short bytes_wide;   /* scan-line width in bytes */
  34:     char *bits;     /* pointer to the bits */
  35: };
  36: 
  37: #define MAXCHARS 128        /* make 256 for 8 bit characters */
  38: 
  39: /*
  40:  * Per-character information.
  41:  * There is one of these for each character in a font.
  42:  * All fields are filled in at font definition time,
  43:  * except for the bitmap, which is "faulted in"
  44:  * when the character is first referenced.
  45:  */
  46: struct glyph {
  47:     long addr;      /* address of bitmap in PXL file */
  48:     long dvi_adv;       /* DVI units to move reference point */
  49:     short x, y;     /* x and y offset in pixels */
  50:     struct bitmap bitmap;   /* bitmap for character */
  51:     short pxl_adv;      /* pixels to move reference point */
  52: };
  53: 
  54: /*
  55:  * The layout of a font information block.
  56:  * There is one of these for every loaded font or
  57:  * magnification thereof.
  58:  *
  59:  * Also note the strange units.  The design size is in 1/2^20 point
  60:  * units (also called micro-points), and the individual character widths
  61:  * are in the TFM file in 1/2^20 ems units, i.e. relative to the design size.
  62:  */
  63: 
  64: struct font {
  65:     struct font *next;      /* link to next font info block */
  66:     struct font *prev;      /* link to previous font info block */
  67:     int TeXnumber;          /* font number (in DVI file) */
  68:     int scale;          /* scaled size in DVI units */
  69:     int design;         /* design size in DVI units */
  70:     char *fontname;         /* PXL file name */
  71:     FILE *file;         /* open PXL file or NULL */
  72:     struct glyph glyph[MAXCHARS];
  73: };