PLplot: cdtext.c Source File

PLplot 5.10.0

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cdtext.c
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1 //
2 // cdtext is an example program that uses the text attribute commands
3 // cdSetTextPath and cdSetTextOrient
4 //
5 //
6 // cdtext.c: test program for the cgmdraw module.
7 //
8 // Written by G. Edward Johnson <mailto:lorax@nist.gov>
9 // Date: May 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 #include <stdio.h>
20 #include <math.h>
21 #include <string.h>
22 #include <stdlib.h>
23 #include "defines.h"
24 #include "cd.h"
25
26
27 int main()
28 {
29 // you must create a pointer to the image(s) that you will be using
30 // not suprisingly, it is of type cdImagePtr
31 cdImagePtr im;
32
33 // this is a pointer to the output file you will be using
34 FILE *outf;
35
36 // these will be index's into the color palette containing
37 // the corresponding colors
38 int black, white, blue;
39
40
41 // Create an image 800 pixels wide by 400 pixels high
42 im = cdImageCreate( 800, 400 );
43
44 // allocate some colors (isn't this fun?)
45 // the first color allocated is the background color
46 white = cdImageColorAllocate( im, 255, 255, 255 );
47 black = cdImageColorAllocate( im, 0, 0, 0 );
48 blue = cdImageColorAllocate( im, 0, 0, 255 );
49
50
51 // set the text attributes
52 // font, colorindex, and size respectivily
53
54 // font is the style the text is written in. 1 is for Times,
55 // 5 is for Helvetica.
56 // we will have black text for this one
57 // Size is a tough one, but larger numbers give larger text.
58 //
59 if ( !( cdSetTextAttrib( im, 5, black, 20 ) ) )
60 return 1;
61
62 // Set some line attributes, lets make lines solid, width 1, and blue
63 //
64 if ( !( cdSetLineAttrib( im, 1, 1, blue ) ) )
65 return 1;
66
67 // Draw a couple of grid lines
68 if ( !( cdLine( im, 0, 200, 799, 200 ) ) )
69 return 1;
70 if ( !( cdLine( im, 200, 0, 200, 399 ) ) )
71 return 1;
72 if ( !( cdLine( im, 600, 0, 600, 399 ) ) )
73 return 1;
74
75
76 // Show Text going left, up, down, and right, all starting
77 // from the same point
78
79 // Text going to the left
80 if ( !( cdSetTextPath( im, 1 ) ) )
81 return 1;
82 if ( !( cdText( im, 200, 200, "Text Left" ) ) )
83 return 1;
84
85 // Text going UP
86 if ( !( cdSetTextPath( im, 2 ) ) )
87 return 1;
88 if ( !( cdText( im, 200, 200, "Text Up" ) ) )
89 return 1;
90
91 // Text going DOWN
92 if ( !( cdSetTextPath( im, 3 ) ) )
93 return 1;
94 if ( !( cdText( im, 200, 200, "Text Down" ) ) )
95 return 1;
96
97 // Text going to the RIGHT
98 if ( !( cdSetTextPath( im, 0 ) ) )
99 return 1;
100 if ( !( cdText( im, 200, 200, "Text Right" ) ) )
101 return 1;
102
103 // Show text going at an angle of 0, 45, 90, 135, 180 Degrees
104 //
105
106 // Text at no angle
107 if ( !( cdText( im, 600, 200, "CGM Draw" ) ) )
108 return 1;
109
110 // Text, 45 Degree Angle
111 if ( !( cdSetTextOrient( im, -1, 1, 1, 1 ) ) )
112 return 1;
113 if ( !( cdText( im, 600, 200, "CGM Draw" ) ) )
114 return 1;
115
116 // Text, 90 Degree Angle
117 if ( !( cdSetTextOrient( im, -1, 0, 0, 1 ) ) )
118 return 1;
119 if ( !( cdText( im, 600, 200, "CGM Draw" ) ) )
120 return 1;
121
122 // Text, 135 Degree Angle
123 if ( !( cdSetTextOrient( im, -1, -1, -1, 1 ) ) )
124 return 1;
125 if ( !( cdText( im, 600, 200, "CGM Draw" ) ) )
126 return 1;
127
128 // Text, 180 Degree Angle
129 if ( !( cdSetTextOrient( im, 0, -1, -1, 0 ) ) )
130 return 1;
131 if ( !( cdText( im, 600, 200, "CGM Draw" ) ) )
132 return 1;
133
134 // Skewed Text, No Angle
135 if ( !( cdSetTextOrient( im, 1, 1, 1, 0 ) ) )
136 {
137 return 1;
138 }
139 if ( !( cdSetTextAttrib( im, -1, -1, 40 ) ) )
140 {
141 return 1;
142 }
143 if ( !( cdText( im, 300, 300, "CGM Draw" ) ) )
144 {
145 return 1;
146 }
147 // show some lines around it
148 if ( !( cdLine( im, 300, 300, 500, 300 ) ) )
149 return 1;
150 if ( !( cdLine( im, 300, 300, 340, 340 ) ) )
151 return 1;
152
153 // reset the text to 0 angle
154 if ( !( cdSetTextOrient( im, 0, 1, 1, 0 ) ) )
155 return 1;
156
157
158 if ( !( cdSetTextAttrib( im, 5, -1, 20 ) ) )
159 return 1;
160 if ( !( cdText( im, 5, 5, "G. Edward Johnson" ) ) )
161 return 1;
162
163 // now write the file out, lets call it cdtext.cgm
164 outf = fopen( "cdtext.cgm", "wb" );
165 if ( !outf )
166 return 1;
167 cdImageCgm( im, outf );
168 fclose( outf );
169 outf = 0;
170
171 // Remember to destroy the image when you are done
172 cdImageDestroy( im );
173 im = 0;
174
175 printf( "CGM Text Example!!!\n" );
176
177 return 0;
178 }