lemon-project-template-glpk

view deps/glpk/src/glprgr.c @ 9:33de93886c88

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Import GLPK 4.47
author Alpar Juttner <alpar@cs.elte.hu>
date Sun, 06 Nov 2011 20:59:10 +0100
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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, 2011 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
75 static void put_byte(FILE *fp, int c)
76 { fputc(c, fp);
77 return;
78 }
79
80 static 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
87 static 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
94 int 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 }
161 fini: if (fp != NULL) fclose(fp);
162 return ret;
163 }
164
165 /* eof */