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Text File  |  1991-02-06  |  52KB  |  1,052 lines
  1. /* GNUPLOT - bitmap.c */
  2. /*
  3.  * Copyright (C) 1990
  4.  *
  5.  * Permission to use, copy, and distribute this software and its
  6.  * documentation for any purpose with or without fee is hereby granted,
  7.  * provided that the above copyright notice appear in all copies and
  8.  * that both that copyright notice and this permission notice appear
  9.  * in supporting documentation.
  10.  *
  11.  * Permission to modify the software is granted, but not the right to
  12.  * distribute the modified code.  Modifications are to be distributed
  13.  * as patches to released version.
  14.  *
  15.  * This software  is provided "as is" without express or implied warranty.
  16.  *
  17.  *
  18.  * AUTHORS
  19.  *  Jyrki Yli-Nokari <jty@intrin.UUCP>
  20.  *  Ronald J. Hartranft <rjh2@ns.cc.lehigh.edu>
  21.  *  Russell Lang <rjl@monu1.cc.monash.edu.au>
  22.  *
  23.  * send your comments or suggestions to (pixar!info-gnuplot@sun.com).
  24.  *
  25.  */
  26.  
  27. /*
  28. ** General raster plotting routines.
  29. ** Raster routines written and copyrighted 1987 by
  30. ** Jyrki Yli-Nokari (jty@intrin.UUCP)
  31. ** Intrinsic, Ltd.
  32. **
  33. ** You may use this code for anything you like as long as
  34. ** you are not selling it and the credit is given and
  35. ** this message retained.
  36. **
  37. */
  38.  
  39. /* Bitmap plotting routines derived from above raster plotting routines
  40.  * Russell Lang, 1990
  41.  */
  42.  
  43. #include <stdio.h>
  44. #include "plot.h"
  45. #include "bitmap.h"
  46.  
  47. bitmap *b_p = (bitmap *)NULL;    /* global pointer to bitmap */
  48. unsigned int b_currx, b_curry;    /* the current coordinates */
  49. unsigned int b_xsize, b_ysize;    /* the size of the bitmap */
  50. unsigned int b_planes;            /* number of color planes */
  51. unsigned int b_psize;            /* size of each plane */
  52. unsigned int b_rastermode;        /* raster mode rotates -90deg */
  53. unsigned int b_linemask = 0xffff;    /* 16 bit mask for dotted lines */
  54. unsigned int b_value = 1;        /* colour of lines */
  55. unsigned int b_hchar;            /* width of characters */
  56. unsigned int b_hbits;            /* actual bits in char horizontally */
  57. unsigned int b_vchar;            /* height of characters */
  58. unsigned int b_vbits;            /* actual bits in char vertically */
  59. unsigned int b_angle;            /* rotation of text */
  60. char_box b_font[FNT_CHARS];        /* the current font */
  61. unsigned int b_pattern[] = {0xffff, 0x1111,
  62.     0xffff, 0x5555, 0x3333, 0x7777, 0x3f3f, 0x0f0f, 0x5f5f};
  63. int b_maskcount = 0;
  64. unsigned int b_lastx, b_lasty;    /* last pixel set - used by b_line */
  65.  
  66. #define IN(i,size)  ((unsigned)i < (unsigned)size)
  67.  
  68. /* 5x9 font, bottom row first, left pixel in lsb */
  69. char_row fnt5x9[FNT_CHARS][FNT5X9_VBITS] = {
  70.   /* */  {000000,000000,000000,000000,000000,000000,000000,000000,000000},
  71.   /*!*/  {000000,000000,0x0004,000000,0x0004,0x0004,0x0004,0x0004,0x0004},
  72.   /*"*/  {000000,000000,000000,000000,000000,000000,0x000a,0x000a,0x000a},
  73.   /*#*/  {000000,000000,0x000a,0x000a,0x001f,0x000a,0x001f,0x000a,0x000a},
  74.   /*$*/  {000000,000000,0x0004,0x000f,0x0014,0x000e,0x0005,0x001e,0x0004},
  75.   /*%*/  {000000,000000,0x0018,0x0019,0x0002,0x0004,0x0008,0x0013,0x0003},
  76.   /*&*/  {000000,000000,0x0016,0x0009,0x0015,0x0002,0x0005,0x0005,0x0002},
  77.   /*'*/  {000000,000000,000000,000000,000000,0x0002,0x0004,0x0006,0x0006},
  78.   /*(*/  {000000,000000,0x0008,0x0004,0x0002,0x0002,0x0002,0x0004,0x0008},
  79.   /*)*/  {000000,000000,0x0002,0x0004,0x0008,0x0008,0x0008,0x0004,0x0002},
  80.   /***/  {000000,000000,0x0004,0x0015,0x000e,0x001f,0x000e,0x0015,0x0004},
  81.   /*+*/  {000000,000000,000000,0x0004,0x0004,0x001f,0x0004,0x0004,000000},
  82.   /*,*/  {000000,0x0002,0x0004,0x0006,0x0006,000000,000000,000000,000000},
  83.   /*-*/  {000000,000000,000000,000000,000000,0x001f,000000,000000,000000},
  84.   /*.*/  {000000,000000,0x0006,0x0006,000000,000000,000000,000000,000000},
  85.   /*-/-*/{000000,000000,000000,0x0001,0x0002,0x0004,0x0008,0x0010,000000},
  86.   /*0*/  {000000,000000,0x000e,0x0011,0x0013,0x0015,0x0019,0x0011,0x000e},
  87.   /*1*/  {000000,000000,0x000e,0x0004,0x0004,0x0004,0x0004,0x0006,0x0004},
  88.   /*2*/  {000000,000000,0x001f,0x0001,0x0001,0x000e,0x0010,0x0011,0x000e},
  89.   /*3*/  {000000,000000,0x000e,0x0011,0x0010,0x000c,0x0010,0x0011,0x000e},
  90.   /*4*/  {000000,000000,0x0008,0x0008,0x001f,0x0009,0x000a,0x000c,0x0008},
  91.   /*5*/  {000000,000000,0x000e,0x0011,0x0010,0x0010,0x000f,0x0001,0x001f},
  92.   /*6*/  {000000,000000,0x000e,0x0011,0x0011,0x000f,0x0001,0x0002,0x000c},
  93.   /*7*/  {000000,000000,0x0001,0x0001,0x0002,0x0004,0x0008,0x0010,0x001f},
  94.   /*8*/  {000000,000000,0x000e,0x0011,0x0011,0x000e,0x0011,0x0011,0x000e},
  95.   /*9*/  {000000,000000,0x0006,0x0008,0x0010,0x001e,0x0011,0x0011,0x000e},
  96.   /*:*/  {000000,000000,000000,0x0006,0x0006,000000,0x0006,0x0006,000000},
  97.   /*;*/  {000000,0x0001,0x0002,0x0006,0x0006,000000,0x0006,0x0006,000000},
  98.   /*<*/  {000000,000000,0x0008,0x0004,0x0002,0x0001,0x0002,0x0004,0x0008},
  99.   /*=*/  {000000,000000,000000,000000,0x001f,000000,0x001f,000000,000000},
  100.   /*>*/  {000000,000000,0x0002,0x0004,0x0008,0x0010,0x0008,0x0004,0x0002},
  101.   /*?*/  {000000,000000,0x0004,000000,0x0004,0x0008,0x0010,0x0011,0x000e},
  102.   /*@*/  {000000,000000,0x000e,0x0015,0x0015,0x0016,0x0010,0x0011,0x000e},
  103.   /*A*/  {000000,000000,0x0011,0x0011,0x001f,0x0011,0x0011,0x000a,0x0004},
  104.   /*B*/  {000000,000000,0x000f,0x0012,0x0012,0x000e,0x0012,0x0012,0x000f},
  105.   /*C*/  {000000,000000,0x000e,0x0011,0x0001,0x0001,0x0001,0x0011,0x000e},
  106.   /*D*/  {000000,000000,0x000f,0x0012,0x0012,0x0012,0x0012,0x0012,0x000f},
  107.   /*E*/  {000000,000000,0x001f,0x0001,0x0001,0x0007,0x0001,0x0001,0x001f},
  108.   /*F*/  {000000,000000,0x0001,0x0001,0x0001,0x0007,0x0001,0x0001,0x001f},
  109.   /*G*/  {000000,000000,0x001e,0x0011,0x0011,0x0019,0x0001,0x0001,0x001e},
  110.   /*H*/  {000000,000000,0x0011,0x0011,0x0011,0x001f,0x0011,0x0011,0x0011},
  111.   /*I*/  {000000,000000,0x000e,0x0004,0x0004,0x0004,0x0004,0x0004,0x000e},
  112.   /*J*/  {000000,000000,0x000e,0x0011,0x0010,0x0010,0x0010,0x0010,0x0010},
  113.   /*K*/  {000000,000000,0x0011,0x0009,0x0005,0x0003,0x0005,0x0009,0x0011},
  114.   /*L*/  {000000,000000,0x001f,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001},
  115.   /*M*/  {000000,000000,0x0011,0x0011,0x0011,0x0015,0x0015,0x001b,0x0011},
  116.   /*N*/  {000000,000000,0x0011,0x0011,0x0011,0x0019,0x0015,0x0013,0x0011},
  117.   /*O*/  {000000,000000,0x000e,0x0011,0x0011,0x0011,0x0011,0x0011,0x000e},
  118.   /*P*/  {000000,000000,0x0001,0x0001,0x0001,0x000f,0x0011,0x0011,0x000f},
  119.   /*Q*/  {000000,0x0018,0x000e,0x0015,0x0011,0x0011,0x0011,0x0011,0x000e},
  120.   /*R*/  {000000,000000,0x0011,0x0009,0x0005,0x000f,0x0011,0x0011,0x000f},
  121.   /*S*/  {000000,000000,0x000e,0x0011,0x0010,0x000e,0x0001,0x0011,0x000e},
  122.   /*T*/  {000000,000000,0x0004,0x0004,0x0004,0x0004,0x0004,0x0004,0x001f},
  123.   /*U*/  {000000,000000,0x000e,0x0011,0x0011,0x0011,0x0011,0x0011,0x0011},
  124.   /*V*/  {000000,000000,0x0004,0x0004,0x000a,0x000a,0x0011,0x0011,0x0011},
  125.   /*W*/  {000000,000000,0x0011,0x001b,0x0015,0x0011,0x0011,0x0011,0x0011},
  126.   /*X*/  {000000,000000,0x0011,0x0011,0x000a,0x0004,0x000a,0x0011,0x0011},
  127.   /*Y*/  {000000,000000,0x0004,0x0004,0x0004,0x0004,0x000a,0x0011,0x0011},
  128.   /*Z*/  {000000,000000,0x001f,0x0001,0x0002,0x0004,0x0008,0x0010,0x001f},
  129.   /*[*/  {000000,000000,0x000e,0x0002,0x0002,0x0002,0x0002,0x0002,0x000e},
  130.   /*\*/  {000000,000000,000000,0x0010,0x0008,0x0004,0x0002,0x0001,000000},
  131.   /*]*/  {000000,000000,0x000e,0x0008,0x0008,0x0008,0x0008,0x0008,0x000e},
  132.   /*^*/  {000000,000000,000000,000000,000000,000000,0x0011,0x000a,0x0004},
  133.   /*_*/  {000000,000000,0x001f,000000,000000,000000,000000,000000,000000},
  134.   /*`*/  {000000,000000,000000,000000,000000,0x0008,0x0004,0x000c,0x000c},
  135.   /*a*/  {000000,000000,0x001e,0x0011,0x001e,0x0010,0x000e,000000,000000},
  136.   /*b*/  {000000,000000,0x000d,0x0013,0x0011,0x0013,0x000d,0x0001,0x0001},
  137.   /*c*/  {000000,000000,0x000e,0x0011,0x0001,0x0011,0x000e,000000,000000},
  138.   /*d*/  {000000,000000,0x0016,0x0019,0x0011,0x0019,0x0016,0x0010,0x0010},
  139.   /*e*/  {000000,000000,0x000e,0x0001,0x001f,0x0011,0x000e,000000,000000},
  140.   /*f*/  {000000,000000,0x0004,0x0004,0x0004,0x000e,0x0004,0x0014,0x0008},
  141.   /*g*/  {0x000e,0x0011,0x0016,0x0019,0x0011,0x0019,0x0016,000000,000000},
  142.   /*h*/  {000000,000000,0x0011,0x0011,0x0011,0x0013,0x000d,0x0001,0x0001},
  143.   /*i*/  {000000,000000,0x000e,0x0004,0x0004,0x0004,0x0006,000000,0x0004},
  144.   /*j*/  {0x0006,0x0009,0x0008,0x0008,0x0008,0x0008,0x000c,000000,0x0