gravity.cpp revision be1bbacaa9919aa3754e3abae43557be13669657 
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 John Christy.
13//
14
15#include <Magick++.h>
16#include <string>
17#include <iostream>
18#include <list>
19
20using namespace std;
21
22using namespace Magick;
23
24int main( int /*argc*/, char ** argv)
25{
26
27  // Initialize ImageMagick install location for Windows
28  InitializeMagick(*argv);
29
30  try {
31
32    string srcdir("");
33    if(getenv("SRCDIR") != 0)
34      srcdir = getenv("SRCDIR");
35
36    int x = 100;
37    int y = 100;
38
39    list<Image> animation;
40
41    Image base( Geometry(600,600), Color("white") );
42    base.depth(8);
43    base.strokeColor("#600");
44    base.fillColor(Color());
45    base.draw( DrawableLine( 300,100, 300,500 ) );
46    base.draw( DrawableLine( 100,300, 500,300 ) );
47    base.draw( DrawableRectangle( 100,100, 500,500 ) );
48    base.density( Point(72,72) );
49    base.strokeColor(Color());
50    base.fillColor("#600");
51    base.fontPointsize( 30 );
52    base.boxColor( "red" );
53    base.animationDelay( 20 );
54    base.compressType( RLECompression );
55
56    for ( int angle = 0; angle < 360; angle += 30 )
57      {
58        cout << "angle " << angle << endl;
59        Image pic = base;
60        pic.annotate( "NorthWest", Geometry(0,0,x,y), NorthWestGravity, angle );
61        pic.annotate( "North", Geometry(0,0,0,y), NorthGravity, angle );
62        pic.annotate( "NorthEast", Geometry(0,0,x,y), NorthEastGravity, angle );
63        pic.annotate( "East", Geometry(0,0,x,0), EastGravity, angle );
64        pic.annotate( "Center", Geometry(0,0,0,0), CenterGravity, angle );
65        pic.annotate( "SouthEast", Geometry(0,0,x,y), SouthEastGravity, angle );
66        pic.annotate( "South", Geometry(0,0,0,y), SouthGravity, angle );
67        pic.annotate( "SouthWest", Geometry(0,0,x,y), SouthWestGravity, angle );
68        pic.annotate( "West", Geometry(0,0,x,0), WestGravity, angle );
69        animation.push_back( pic );
70      }
71    cout << "Writing image \"gravity_out.miff\" ..." << endl;
72    writeImages( animation.begin(), animation.end(), "gravity_out.miff" );
73    // system( "animate gravity_out.miff" );
74
75  }
76  catch( exception &error_ )
77    {
78      cout << "Caught exception: " << error_.what() << endl;
79      return 1;
80    }
81
82  return 0;
83}
84