gravity.cpp revision d9eec389c7cc5509499adbae12fd7a129914a732 
1// This may look like C code, but it is really -*- C++ -*-
2//
3// Copyright Bob Friesenhahn, 2000, 2001, 2003
4//
5// Demo of text annotation with gravity.  Produces an animation showing
6// the effect of rotated text assize_t with various gravity specifications.
7//
8// After running demo program, run 'animate gravity_out.miff' if you
9// are using X-Windows to see an animated result.
10//
11// Concept and algorithms lifted from PerlMagick demo script written
12// by Cristy.
13//
14
15#include <cstring>
16#include <Magick++.h>
17#include <string>
18#include <iostream>
19#include <list>
20
21using namespace std;
22
23using namespace Magick;
24
25int main( int /*argc*/, char ** argv)
26{
27
28  // Initialize ImageMagick install location for Windows
29  InitializeMagick(*argv);
30
31  try {
32
33    string srcdir("");
34    if(getenv("SRCDIR") != 0)
35      srcdir = getenv("SRCDIR");
36
37    int x = 100;
38    int y = 100;
39
40    list<Image> animation;
41
42    Image base( Geometry(600,600), Color("white") );
43    base.depth(8);
44    base.strokeColor("#600");
45    base.fillColor(Color());
46    base.draw( DrawableLine( 300,100, 300,500 ) );
47    base.draw( DrawableLine( 100,300, 500,300 ) );
48    base.draw( DrawableRectangle( 100,100, 500,500 ) );
49    base.density( Geometry(72,72) );
50    base.strokeColor(Color());
51    base.fillColor("#600");
52    base.fontPointsize( 30 );
53    base.boxColor( "red" );
54    base.animationDelay( 20 );
55    base.compressType( RLECompression );
56
57    for ( int angle = 0; angle < 360; angle += 30 )
58      {
59        cout << "angle " << angle << endl;
60        Image pic = base;
61        pic.annotate( "NorthWest", Geometry(0,0,x,y), NorthWestGravity, angle );
62        pic.annotate( "North", Geometry(0,0,0,y), NorthGravity, angle );
63        pic.annotate( "NorthEast", Geometry(0,0,x,y), NorthEastGravity, angle );
64        pic.annotate( "East", Geometry(0,0,x,0), EastGravity, angle );
65        pic.annotate( "Center", Geometry(0,0,0,0), CenterGravity, angle );
66        pic.annotate( "SouthEast", Geometry(0,0,x,y), SouthEastGravity, angle );
67        pic.annotate( "South", Geometry(0,0,0,y), SouthGravity, angle );
68        pic.annotate( "SouthWest", Geometry(0,0,x,y), SouthWestGravity, angle );
69        pic.annotate( "West", Geometry(0,0,x,0), WestGravity, angle );
70        animation.push_back( pic );
71      }
72    cout << "Writing image \"gravity_out.miff\" ..." << endl;
73    writeImages( animation.begin(), animation.end(), "gravity_out.miff" );
74    // system( "animate gravity_out.miff" );
75
76  }
77  catch( exception &error_ )
78    {
79      cout << "Caught exception: " << error_.what() << endl;
80      return 1;
81    }
82
83  return 0;
84}
85