COIN-OR::LEMON - Graph Library

source: glpk-cmake/src/glprgr.c @ 1:c445c931472f

Last change on this file since 1:c445c931472f was 1:c445c931472f, checked in by Alpar Juttner <alpar@…>, 10 years ago

Import glpk-4.45

  • Generated files and doc/notes are removed
File size: 6.1 KB
Line 
1/* glprgr.c */
2
3/***********************************************************************
4*  This code is part of GLPK (GNU Linear Programming Kit).
5*
6*  Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
7*  2009, 2010 Andrew Makhorin, Department for Applied Informatics,
8*  Moscow Aviation Institute, Moscow, Russia. All rights reserved.
9*  E-mail: <mao@gnu.org>.
10*
11*  GLPK is free software: you can redistribute it and/or modify it
12*  under the terms of the GNU General Public License as published by
13*  the Free Software Foundation, either version 3 of the License, or
14*  (at your option) any later version.
15*
16*  GLPK is distributed in the hope that it will be useful, but WITHOUT
17*  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18*  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19*  License for more details.
20*
21*  You should have received a copy of the GNU General Public License
22*  along with GLPK. If not, see <http://www.gnu.org/licenses/>.
23***********************************************************************/
24
25#define _GLPSTD_ERRNO
26#define _GLPSTD_STDIO
27#include "glpenv.h"
28#include "glprgr.h"
29#define xfault xerror
30
31/***********************************************************************
32*  NAME
33*
34*  rgr_write_bmp16 - write 16-color raster image in BMP file format
35*
36*  SYNOPSIS
37*
38*  #include "glprgr.h"
39*  int rgr_write_bmp16(const char *fname, int m, int n, const char
40*     map[]);
41*
42*  DESCRIPTION
43*
44*  The routine rgr_write_bmp16 writes 16-color raster image in
45*  uncompressed BMP file format (Windows bitmap) to a binary file whose
46*  name is specified by the character string fname.
47*
48*  The parameters m and n specify, respectively, the number of rows and
49*  the numbers of columns (i.e. height and width) of the raster image.
50*
51*  The character array map has m*n elements. Elements map[0, ..., n-1]
52*  correspond to the first (top) scanline, elements map[n, ..., 2*n-1]
53*  correspond to the second scanline, etc.
54*
55*  Each element of the array map specifies a color of the corresponding
56*  pixel as 8-bit binary number XXXXIRGB, where four high-order bits (X)
57*  are ignored, I is high intensity bit, R is red color bit, G is green
58*  color bit, and B is blue color bit. Thus, all 16 possible colors are
59*  coded as following hexadecimal numbers:
60*
61*     0x00 = black         0x08 = dark gray
62*     0x01 = blue          0x09 = bright blue
63*     0x02 = green         0x0A = bright green
64*     0x03 = cyan          0x0B = bright cyan
65*     0x04 = red           0x0C = bright red
66*     0x05 = magenta       0x0D = bright magenta
67*     0x06 = brown         0x0E = yellow
68*     0x07 = light gray    0x0F = white
69*
70*  RETURNS
71*
72*  If no error occured, the routine returns zero; otherwise, it prints
73*  an appropriate error message and returns non-zero. */
74
75static void put_byte(FILE *fp, int c)
76{     fputc(c, fp);
77      return;
78}
79
80static void put_word(FILE *fp, int w)
81{     /* big endian */
82      put_byte(fp, w);
83      put_byte(fp, w >> 8);
84      return;
85}
86
87static void put_dword(FILE *fp, int d)
88{     /* big endian */
89      put_word(fp, d);
90      put_word(fp, d >> 16);
91      return;
92}
93
94int rgr_write_bmp16(const char *fname, int m, int n, const char map[])
95{     FILE *fp;
96      int offset, bmsize, i, j, b, ret = 0;
97      if (!(1 <= m && m <= 32767))
98         xfault("rgr_write_bmp16: m = %d; invalid height\n", m);
99      if (!(1 <= n && n <= 32767))
100         xfault("rgr_write_bmp16: n = %d; invalid width\n", n);
101      fp = fopen(fname, "wb");
102      if (fp == NULL)
103      {  xprintf("rgr_write_bmp16: unable to create `%s' - %s\n",
104            fname, strerror(errno));
105         ret = 1;
106         goto fini;
107      }
108      offset = 14 + 40 + 16 * 4;
109      bmsize = (4 * n + 31) / 32;
110      /* struct BMPFILEHEADER (14 bytes) */
111      /* UINT bfType */          put_byte(fp, 'B'), put_byte(fp, 'M');
112      /* DWORD bfSize */         put_dword(fp, offset + bmsize * 4);
113      /* UINT bfReserved1 */     put_word(fp, 0);
114      /* UNIT bfReserved2 */     put_word(fp, 0);
115      /* DWORD bfOffBits */      put_dword(fp, offset);
116      /* struct BMPINFOHEADER (40 bytes) */
117      /* DWORD biSize */         put_dword(fp, 40);
118      /* LONG biWidth */         put_dword(fp, n);
119      /* LONG biHeight */        put_dword(fp, m);
120      /* WORD biPlanes */        put_word(fp, 1);
121      /* WORD biBitCount */      put_word(fp, 4);
122      /* DWORD biCompression */  put_dword(fp, 0 /* BI_RGB */);
123      /* DWORD biSizeImage */    put_dword(fp, 0);
124      /* LONG biXPelsPerMeter */ put_dword(fp, 2953 /* 75 dpi */);
125      /* LONG biYPelsPerMeter */ put_dword(fp, 2953 /* 75 dpi */);
126      /* DWORD biClrUsed */      put_dword(fp, 0);
127      /* DWORD biClrImportant */ put_dword(fp, 0);
128      /* struct RGBQUAD (16 * 4 = 64 bytes) */
129      /* CGA-compatible colors: */
130      /* 0x00 = black */         put_dword(fp, 0x000000);
131      /* 0x01 = blue */          put_dword(fp, 0x000080);
132      /* 0x02 = green */         put_dword(fp, 0x008000);
133      /* 0x03 = cyan */          put_dword(fp, 0x008080);
134      /* 0x04 = red */           put_dword(fp, 0x800000);
135      /* 0x05 = magenta */       put_dword(fp, 0x800080);
136      /* 0x06 = brown */         put_dword(fp, 0x808000);
137      /* 0x07 = light gray */    put_dword(fp, 0xC0C0C0);
138      /* 0x08 = dark gray */     put_dword(fp, 0x808080);
139      /* 0x09 = bright blue */   put_dword(fp, 0x0000FF);
140      /* 0x0A = bright green */  put_dword(fp, 0x00FF00);
141      /* 0x0B = bright cyan */   put_dword(fp, 0x00FFFF);
142      /* 0x0C = bright red */    put_dword(fp, 0xFF0000);
143      /* 0x0D = bright magenta */ put_dword(fp, 0xFF00FF);
144      /* 0x0E = yellow */        put_dword(fp, 0xFFFF00);
145      /* 0x0F = white */         put_dword(fp, 0xFFFFFF);
146      /* pixel data bits */
147      b = 0;
148      for (i = m - 1; i >= 0; i--)
149      {  for (j = 0; j < ((n + 7) / 8) * 8; j++)
150         {  b <<= 4;
151            b |= (j < n ? map[i * n + j] & 15 : 0);
152            if (j & 1) put_byte(fp, b);
153         }
154      }
155      fflush(fp);
156      if (ferror(fp))
157      {  xprintf("rgr_write_bmp16: write error on `%s' - %s\n",
158            fname, strerror(errno));
159         ret = 1;
160      }
161fini: if (fp != NULL) fclose(fp);
162      return ret;
163}
164
165/* eof */
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