1 //
2 // cdsimple is a very simple program that uses the cd library.
3 // it will walk you through the basics.
4 //
5 //
6 // cdsimple.c: test program for the cgmdraw module.
7 //
8 //      Written by G. Edward Johnson <mailto:lorax@nist.gov>
9 //      Date: April 1996
10 //      Copyright: cd software produced by NIST, an agency of the
11 //      U.S. government, is by statute not subject to copyright
12 //      in the United States. Recipients of this software assume all
13 //      responsibilities associated with its operation, modification
14 //      and maintenance.
15 //
16 //
17 
18 
19 #ifndef NOMALLOCH
20 #include <malloc.h>
21 #endif
22 #include <stdio.h>
23 #include <math.h>
24 #include <string.h>
25 #include <stdlib.h>
26 #include "defines.h"
27 #include "cd.h"
28 
29 
main()30 int main()
31 {
32     // you must create a pointer to the image(s) that you will be using
33     // not suprisingly, it is of type cdImagePtr
34     cdImagePtr im;
35 
36     // this is a pointer to the output file you will be using
37     FILE *outf;
38 
39     // these will be index's into the color palette containing
40     // the corresponding colors
41     int black, white, blue;
42 
43 
44     // Create an image 400 pixels wide by 500 pixels high
45     im = cdImageCreate( 400, 500 );
46 
47     // allocate some colors (isn't this fun?)
48     // the first color allocated is the background color
49     white = cdImageColorAllocate( im, 255, 255, 255 );
50     black = cdImageColorAllocate( im, 0, 0, 0 );
51     blue  = cdImageColorAllocate( im, 0, 0, 255 );
52 
53     // Set the fill attributes
54     // fill, colorindex, and hatch respectivily
55     // see the cd documentation for a complete description
56 
57     // fill is the color that will be on the inside of filled objects
58     // such as rectangles and polygons.
59     // It can be 1 for solid color, 2 for hatch pattern, 4 for empty
60     // let's use blue for the fill color
61     // we are going to set it to solid, so the hatch pattern doesn't
62     // matter.  we will signify no change by putting in -1
63     if ( !( cdSetShapeFillAttrib( im, 1, blue, -1 ) ) )
64         return 1;
65 
66     // notice that we also checked to make sure the command actually
67     // worked.
68 
69     // we don't want the edges of our shapes to be a different color
70     // so make them invisible.  0 means invisible, 1 means visible.
71     if ( !( cdSetEdgeVis( im, 0 ) ) )
72         return 1;
73 
74 
75     // set the text attributes
76     // font, colorindex, and size respectivily
77 
78     // font is the style the text is written in. 1 is for Times,
79     // 5 is for Helvetica.
80     // we will have black text for this one
81     // Size is a tough one,  but larger numbers give larger text.
82     // 25 is a not too large size
83     if ( !( cdSetTextAttrib( im, 5, black, 25 ) ) )
84         return 1;
85 
86 
87 
88     // Now that we have set some attributes, lets do some drawing
89 
90     // Draw a rectangle (10,450) is upper left, (350,350) is lower right
91     if ( !( cdRectangle( im, 10, 450, 350, 350 ) ) )
92         return 1;
93 
94     // lets put some text in the picture too.
95     // (100,100) is the point at the lower left corner of the text
96     if ( !( cdText( im, 100, 100, "Hello World" ) ) )
97         return 1;
98 
99 
100 
101     // now write the file out, lets call it cdsimple.cgm
102     outf = fopen( "cdsimple.cgm", "wb" );
103     if ( !outf )
104         return 1;
105     cdImageCgm( im, outf );
106     fclose( outf );
107     outf = 0;
108 
109     // Remember to destroy the image when you are done
110     cdImageDestroy( im );
111     im = 0;
112 
113     printf( "I just created a simple CGM!!!\n" );
114 
115     return 0;
116 }
117