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1 package GD::Simple;
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2
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3 =head1 NAME
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4
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5 GD::Simple - Simplified interface to GD library
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6
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7 =head1 SYNOPSIS
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8
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9 use GD::Simple;
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10
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11 # create a new image
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12 $img = GD::Simple->new(400,250);
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13
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14 # draw a red rectangle with blue borders
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15 $img->bgcolor('red');
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16 $img->fgcolor('blue');
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17 $img->rectangle(10,10,50,50);
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18
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19 # draw an empty rectangle with green borders
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20 $img->bgcolor(undef);
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21 $img->fgcolor('green');
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22 $img->rectangle(30,30,100,100);
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23
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24 # move to (80,80) and draw a green line to (100,190)
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25 $img->moveTo(80,80);
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26 $img->lineTo(100,190);
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27
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28 # draw a solid orange ellipse
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29 $img->moveTo(110,100);
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30 $img->bgcolor('orange');
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31 $img->fgcolor('orange');
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32 $img->ellipse(40,40);
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33
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34 # draw a black filled arc
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35 $img->moveTo(150,150);
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36 $img->fgcolor('black');
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37 $img->arc(50,50,0,100,gdNoFill|gdEdged);
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38
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39 # draw a string at (10,180) using the default
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40 # built-in font
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41 $img->moveTo(10,180);
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42 $img->string('This is very simple');
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43
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44 # draw a string at (280,210) using 20 point
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45 # times italic, angled upward 90 degrees
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46 $img->moveTo(280,210);
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47 $img->font('Times:italic');
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48 $img->fontsize(20);
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49 $img->angle(-90);
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50 $img->string('This is very fancy');
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51
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52 # some turtle graphics
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53 $img->moveTo(300,100);
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54 $img->penSize(3,3);
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55 $img->angle(0);
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56 $img->line(20); # 20 pixels going to the right
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57 $img->turn(30); # set turning angle to 30 degrees
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58 $img->line(20); # 20 pixel line
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59 $img->line(20);
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60 $img->line(20);
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61 $img->turn(-90); # set turning angle to -90 degrees
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62 $img->line(50); # 50 pixel line
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63
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64 # draw a cyan polygon edged in blue
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65 my $poly = new GD::Polygon;
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66 $poly->addPt(150,100);
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67 $poly->addPt(199,199);
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68 $poly->addPt(100,199);
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69 $img->bgcolor('cyan');
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70 $img->fgcolor('blue');
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71 $img->penSize(1,1);
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72 $img->polygon($poly);
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73
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74 # convert into png data
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75 print $img->png;
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76
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77 =head1 DESCRIPTION
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78
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79 GD::Simple is a subclass of the GD library that shortens many of the
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80 long GD method calls by storing information about the pen color, size
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81 and position in the GD object itself. It also adds a small number of
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82 "turtle graphics" style calls for those who prefer to work in polar
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83 coordinates. In addition, the library allows you to use symbolic
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84 names for colors, such as "chartreuse", and will manage the colors for
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85 you.
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86
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87 =head2 The Pen
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88
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89 GD::Simple maintains a "pen" whose settings are used for line- and
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90 shape-drawing operations. The pen has the following properties:
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91
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92 =over 4
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93
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94 =item fgcolor
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95
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96 The pen foreground color is the color of lines and the borders of
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97 filled and unfilled shapes.
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98
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99 =item bgcolor
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100
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101 The pen background color is the color of the contents of filled
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102 shapes.
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103
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104 =item pensize
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105
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106 The pen size is the width of the pen. Larger sizes draw thicker
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107 lines.
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108
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109 =item position
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110
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111 The pen position is its current position on the canvas in (X,Y)
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112 coordinates.
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113
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114 =item angle
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115
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116 When drawing in turtle mode, the pen angle determines the current
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117 direction of lines of relative length.
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118
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119 =item turn
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120
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121 When drawing in turtle mode, the turn determines the clockwise or
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122 counterclockwise angle that the pen will turn before drawing the next
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123 line.
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124
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125 =item font
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126
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127 The font to use when drawing text. Both built-in bitmapped fonts and
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128 TrueType fonts are supported.
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129
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130 =item fontsize
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131
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132 The size of the font to use when drawing with TrueType fonts.
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133
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134 =back
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135
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136 One sets the position and properties of the pen and then draws. As
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137 the drawing progresses, the position of the pen is updated.
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138
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139 =head2 Methods
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140
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141 GD::Simple introduces a number of new methods, a few of which have the
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142 same name as GD::Image methods, and hence change their behavior. In
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143 addition to these new methods, GD::Simple objects support all of the
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144 GD::Image methods. If you make a method call that isn't directly
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145 supported by GD::Simple, it refers the request to the underlying
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146 GD::Image object. Hence one can load a JPEG image into GD::Simple and
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147 declare it to be TrueColor by using this call, which is effectively
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148 inherited from GD::Image:
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149
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150 my $img = GD::Simple->newFromJpeg('./myimage.jpg',1);
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151
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152 The rest of this section describes GD::Simple-specific methods.
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153
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154 =cut
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155
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156 use strict;
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157 use GD;
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158 use GD::Group;
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159 use Math::Trig;
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160 use Carp 'croak';
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161
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162 our @ISA = 'Exporter';
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163 our @EXPORT = @GD::EXPORT;
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164 our @EXPORT_OK = @GD::EXPORT_OK;
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165 our $AUTOLOAD;
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166
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167 my %COLORS;
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168 my $IMAGECLASS = 'GD::Image';
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169 my $TRANSPARENT;
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170
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171 sub AUTOLOAD {
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172 my $self = shift;
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173 my($pack,$func_name) = $AUTOLOAD=~/(.+)::([^:]+)$/;
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174 return if $func_name eq 'DESTROY';
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175
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176 if (ref $self && exists $self->{gd}) {
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177 $self->{gd}->$func_name(@_);
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178 } else {
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179 my @result = $IMAGECLASS->$func_name(@_);
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180 if (UNIVERSAL::isa($result[0],'GD::Image')) {
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181 return $self->new($result[0]);
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182 } else {
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183 return @result;
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184 }
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185 }
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186 }
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187
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188 =over 4
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189
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190 =item $img = GD::Simple->new($x,$y [,$truecolor])
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191
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192 =item $img = GD::Simple->new($gd)
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193
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194 Create a new GD::Simple object. There are two forms of new(). In the
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195 first form, pass the width and height of the desired canvas, and
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196 optionally a boolean flag to request a truecolor image. In the second
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197 form, pass a previously-created GD::Image object.
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198
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199 =cut
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200
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201 # dual-purpose code - beware
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202 sub new {
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203 my $pack = shift;
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204
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205 unshift @_,(100,100) if @_ == 0;
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206
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207 if (@_ >= 2) { # traditional GD::Image->new() call
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208 my $gd = $IMAGECLASS->new(@_);
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209 my $self = $pack->new($gd);
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210 $self->clear;
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211 return $self;
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212 }
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213
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214 if (@_ == 1) { # initialize from existing image
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215 my $gd = shift;
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216 my $self = bless {
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217 gd => $gd,
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218 xy => [0,0],
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219 font => gdSmallFont,
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220 fontsize => 9,
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221 turningangle => 0,
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222 angle => 0,
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223 pensize => 1,
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224 },$pack;
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225 $self->{bgcolor} = $self->translate_color(255,255,255);
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226 $self->{fgcolor} = $self->translate_color(0,0,0);
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227 return $self;
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228 }
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229 }
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230
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231 =item GD::Simple->class('GD');
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232
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233 =item GD::Simple->class('GD::SVG');
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234
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235 Select whether new() should use GD or GD::SVG internally. Call
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236 GD::Simple->class('GD::SVG') before calling new() if you wish to
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237 generate SVG images.
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238
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239 If future GD subclasses are created, this method will subport them.
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240
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241 =cut
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242
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243 sub class {
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244 my $pack = shift;
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245 if (@_) {
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246 $IMAGECLASS = shift;
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247 eval "require $IMAGECLASS; 1" or die $@;
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248 $IMAGECLASS = "$IMAGECLASS\:\:Image"
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249 if $IMAGECLASS eq 'GD::SVG';
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250 }
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251 $IMAGECLASS;
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252 }
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253
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254 =item $img->moveTo($x,$y)
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255
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256 This call changes the position of the pen without drawing. It moves
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257 the pen to position ($x,$y) on the drawing canvas.
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258
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259 =cut
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260
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261 sub moveTo {
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262 my $self = shift;
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263 croak 'Usage GD::Simple->moveTo($x,$y)' unless @_ == 2;
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264 my ($x,$y) = @_;
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265 $self->{xy} = [$x,$y];
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266 }
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267
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268 =item $img->move($dx,$dy)
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269
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270 =item $img->move($dr)
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271
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272 This call changes the position of the pen without drawing. When called
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273 with two arguments it moves the pen $dx pixels to the right and $dy
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274 pixels downward. When called with one argument it moves the pen $dr
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275 pixels along the vector described by the current pen angle.
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276
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277 =cut
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278
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279 sub move {
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280 my $self = shift;
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281 if (@_ == 1) { # polar coordinates -- this is r
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282 $self->{angle} += $self->{turningangle};
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283 my $angle = deg2rad($self->{angle});
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284 $self->{xy}[0] += $_[0] * cos($angle);
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285 $self->{xy}[1] += $_[0] * sin($angle);
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286 }
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287 elsif (@_ == 2) { # cartesian coordinates
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288 $self->{xy}[0] += $_[0];
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289 $self->{xy}[1] += $_[1];
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290 } else {
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291 croak 'Usage GD::Simple->move($dx,$dy) or move($r)';
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292 }
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293 }
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294
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295 =item $img->lineTo($x,$y)
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296
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297 The lineTo() call simultaneously draws and moves the pen. It draws a
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298 line from the current pen position to the position defined by ($x,$y)
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299 using the current pen size and color. After drawing, the position of
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300 the pen is updated to the new position.
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301
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302 =cut
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303
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304 sub lineTo {
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305 my $self = shift;
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306 croak 'Usage GD::Simple->lineTo($x,$y)' unless @_ == 2;
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307 $self->gd->line($self->curPos,@_,$self->fgcolor);
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308 $self->moveTo(@_);
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309 }
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310
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311 =item $img->line($dx,$dy)
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312
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313 =item $img->line($dr)
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314
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315 The line() call simultaneously draws and moves the pen. When called
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316 with two arguments it draws a line from the current position of the
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317 pen to the position $dx pixels to the right and $dy pixels down. When
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318 called with one argument, it draws a line $dr pixels long along the
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319 angle defined by the current pen angle.
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320
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321 =cut
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322
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323 sub line {
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324 my $self = shift;
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325 croak 'Usage GD::Simple->line($dx,$dy) or line($r)' unless @_ >= 1;
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326 my @curPos = $self->curPos;
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327 $self->move(@_);
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328 my @newPos = $self->curPos;
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329 $self->gd->line(@curPos,@newPos,$self->fgcolor);
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330 }
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331
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332 =item $img->clear
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333
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334 This method clears the canvas by painting over it with the current
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335 background color.
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336
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337 =cut
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338
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339 sub clear {
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340 my $self = shift;
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341 $self->gd->filledRectangle(0,0,$self->getBounds,$self->bgcolor);
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342 }
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343
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344 =item $img->rectangle($x1,$y1,$x2,$y2)
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345
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346 This method draws the rectangle defined by corners ($x1,$y1),
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347 ($x2,$y2). The rectangle's edges are drawn in the foreground color and
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348 its contents are filled with the background color. To draw a solid
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349 rectangle set bgcolor equal to fgcolor. To draw an unfilled rectangle
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350 (transparent inside), set bgcolor to undef.
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351
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352 =cut
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353
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354 sub rectangle {
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355 my $self = shift;
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356 croak 'Usage GD::Simple->rectangle($x1,$y1,$x2,$y2)' unless @_ == 4;
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357 my $gd = $self->gd;
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358 my ($bg,$fg) = ($self->bgcolor,$self->fgcolor);
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359 $gd->filledRectangle(@_,$bg) if defined $bg;
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360 $gd->rectangle(@_,$fg) if defined $fg && (!defined $bg || $bg != $fg);
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361 }
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362
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363 =item $img->ellipse($width,$height)
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364
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365 This method draws the ellipse centered at the current location with
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366 width $width and height $height. The ellipse's border is drawn in the
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367 foreground color and its contents are filled with the background
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368 color. To draw a solid ellipse set bgcolor equal to fgcolor. To draw
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369 an unfilled ellipse (transparent inside), set bgcolor to undef.
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370
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371 =cut
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372
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373 sub ellipse {
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374 my $self = shift;
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375 croak 'Usage GD::Simple->ellipse($width,$height)' unless @_ == 2;
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376 my $gd = $self->gd;
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377 my ($bg,$fg) = ($self->bgcolor,$self->fgcolor);
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378 $gd->filledEllipse($self->curPos,@_,$bg) if defined $bg;
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379 $gd->ellipse($self->curPos,@_,$fg) if defined $fg && (!defined $bg || $bg != $fg);
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380 }
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381
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382 =item $img->arc($cx,$cy,$width,$height,$start,$end [,$style])
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383
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384 This method draws filled and unfilled arcs. See L<GD> for a
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385 description of the arguments. To draw a solid arc (such as a pie
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386 wedge) set bgcolor equal to fgcolor. To draw an unfilled arc, set
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387 bgcolor to undef.
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388
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389 =cut
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390
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391 sub arc {
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392 my $self = shift;
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393 croak 'Usage GD::Simple->arc($width,$height,$start,$end,$style)' unless @_ >= 4;
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394 my ($width,$height,$start,$end,$style) = @_;
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395 my $gd = $self->gd;
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396 my ($bg,$fg) = ($self->bgcolor,$self->fgcolor);
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397 my ($cx,$cy) = $self->curPos;
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398
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399 if ($bg) {
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400 my @args = ($cx,$cy,$width,$height,$start,$end,$bg);
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401 push @args,$style if defined $style;
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402 $gd->filledArc(@args);
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403 } else {
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404 my @args = ($cx,$cy,$width,$height,$start,$end,$fg);
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405 $gd->arc(@args);
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406 }
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407 }
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408
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409 =item $img->polygon($poly)
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410
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411 This method draws filled and unfilled polygon using the current
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412 settings of fgcolor for the polygon border and bgcolor for the polygon
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413 fill color. See L<GD> for a description of creating polygons. To draw
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414 a solid polygon set bgcolor equal to fgcolor. To draw an unfilled
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415 polygon, set bgcolor to undef.
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416
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417 =cut
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418
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419 sub polygon {
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420 my $self = shift;
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421 croak 'Usage GD::Simple->polygon($poly)' unless @_ == 1;
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422 my $gd = $self->gd;
|
|
|
423 my ($bg,$fg) = ($self->bgcolor,$self->fgcolor);
|
|
|
424 $gd->filledPolygon(@_,$bg) if defined $bg;
|
|
|
425 $gd->openPolygon(@_,$fg) if defined $fg && (!defined $bg || $bg != $fg);
|
|
|
426 }
|
|
|
427
|
|
|
428 =item $img->polyline($poly)
|
|
|
429
|
|
|
430 This method draws polygons without closing the first and last vertices
|
|
|
431 (similar to GD::Image->unclosedPolygon()). It uses the fgcolor to draw
|
|
|
432 the line.
|
|
|
433
|
|
|
434 =cut
|
|
|
435
|
|
|
436 sub polyline {
|
|
|
437 my $self = shift;
|
|
|
438 croak 'Usage GD::Simple->polyline($poly)' unless @_ == 1;
|
|
|
439 my $gd = $self->gd;
|
|
|
440 my $fg = $self->fgcolor;
|
|
|
441 $gd->unclosedPolygon(@_,$fg);
|
|
|
442 }
|
|
|
443
|
|
|
444 =item $img->string($string)
|
|
|
445
|
|
|
446 This method draws the indicated string starting at the current
|
|
|
447 position of the pen. The pen is moved to the end of the drawn string.
|
|
|
448 Depending on the font selected with the font() method, this will use
|
|
|
449 either a bitmapped GD font or a TrueType font. The angle of the pen
|
|
|
450 will be consulted when drawing the text. For TrueType fonts, any angle
|
|
|
451 is accepted. For GD bitmapped fonts, the angle can be either 0 (draw
|
|
|
452 horizontal) or -90 (draw upwards).
|
|
|
453
|
|
|
454 For consistency between the TrueType and GD font behavior, the string
|
|
|
455 is always drawn so that the current position of the pen corresponds to
|
|
|
456 the bottom left of the first character of the text. This is different
|
|
|
457 from the GD behavior, in which the first character of bitmapped fonts
|
|
|
458 hangs down from the pen point.
|
|
|
459
|
|
|
460 This method returns a polygon indicating the bounding box of the
|
|
|
461 rendered text. If an error occurred (such as invalid font
|
|
|
462 specification) it returns undef and an error message in $@.
|
|
|
463
|
|
|
464 =cut
|
|
|
465
|
|
|
466 sub string {
|
|
|
467 my $self = shift;
|
|
|
468 my $string = shift;
|
|
|
469 my $font = $self->font;
|
|
|
470 my @bounds;
|
|
|
471 if (ref $font && $font->isa('GD::Font')) {
|
|
|
472 my ($x,$y) = $self->curPos;
|
|
|
473 if ($self->angle == -90) {
|
|
|
474 $x -= $font->height;
|
|
|
475 $y -= $font->width;
|
|
|
476 $self->gd->stringUp($font,$x,$y,$string,$self->fgcolor);
|
|
|
477 $self->{xy}[1] -= length($string) * $font->width;
|
|
|
478 @bounds = ( ($self->{xy}[0],$y), ($x,$y), ($x,$self->{xy}[1]-$font->width), ($self->{xy}[0],$self->{xy}[1]-$font->width) );
|
|
|
479 } else {
|
|
|
480 $y -= $font->height;
|
|
|
481 $self->gd->string($font,$x,$y,$string,$self->fgcolor);
|
|
|
482 $self->{xy}[0] += length($string) * $font->width;
|
|
|
483 @bounds = ( ($x,$self->{xy}[1]), ($self->{xy}[0],$self->{xy}[1]), ($self->{xy}[0],$y), ($x,$y) );
|
|
|
484 }
|
|
|
485 }
|
|
|
486 else {
|
|
|
487 $self->useFontConfig(1);
|
|
|
488 @bounds = $self->stringFT($self->fgcolor,$font,
|
|
|
489 $self->fontsize,-deg2rad($self->angle), # -pi * $self->angle/180,
|
|
|
490 $self->curPos,$string);
|
|
|
491 return unless @bounds;
|
|
|
492 my ($delta_x,$delta_y) = $self->_string_width(@bounds);
|
|
|
493 $self->{xy}[0] += $delta_x;
|
|
|
494 $self->{xy}[1] += $delta_y;
|
|
|
495 }
|
|
|
496 my $poly = GD::Polygon->new;
|
|
|
497 while (@bounds) {
|
|
|
498 $poly->addPt(splice(@bounds,0,2));
|
|
|
499 }
|
|
|
500 return $poly;
|
|
|
501 }
|
|
|
502
|
|
|
503 =item $metrics = $img->fontMetrics
|
|
|
504
|
|
|
505 =item ($metrics,$width,$height) = GD::Simple->fontMetrics($font,$fontsize,$string)
|
|
|
506
|
|
|
507 This method returns information about the current font, most commonly
|
|
|
508 a TrueType font. It can be invoked as an instance method (on a
|
|
|
509 previously-created GD::Simple object) or as a class method (on the
|
|
|
510 'GD::Simple' class).
|
|
|
511
|
|
|
512 When called as an instance method, fontMetrics() takes no arguments
|
|
|
513 and returns a single hash reference containing the metrics that
|
|
|
514 describe the currently selected font and size. The hash reference
|
|
|
515 contains the following information:
|
|
|
516
|
|
|
517 xheight the base height of the font from the bottom to the top of
|
|
|
518 a lowercase 'm'
|
|
|
519
|
|
|
520 ascent the length of the upper stem of the lowercase 'd'
|
|
|
521
|
|
|
522 descent the length of the lower step of the lowercase 'j'
|
|
|
523
|
|
|
524 lineheight the distance from the bottom of the 'j' to the top of
|
|
|
525 the 'd'
|
|
|
526
|
|
|
527 leading the distance between two adjacent lines
|
|
|
528
|
|
|
529 =cut
|
|
|
530
|
|
|
531 # return %$fontmetrics
|
|
|
532 # keys: 'ascent', 'descent', 'lineheight', 'xheight', 'leading'
|
|
|
533 sub fontMetrics {
|
|
|
534 my $self = shift;
|
|
|
535
|
|
|
536 unless (ref $self) { #class invocation -- create a scratch
|
|
|
537 $self = $self->new;
|
|
|
538 $self->font(shift) if defined $_[0];
|
|
|
539 $self->fontsize(shift) if defined $_[0];
|
|
|
540 }
|
|
|
541
|
|
|
542 my $font = $self->font;
|
|
|
543 my $metrics;
|
|
|
544
|
|
|
545 if (ref $font && $font->isa('GD::Font')) {
|
|
|
546 my $height = $font->height;
|
|
|
547 $metrics = {ascent => 0,
|
|
|
548 descent => 0,
|
|
|
549 lineheight => $height,
|
|
|
550 xheight => $height,
|
|
|
551 leading => 0};
|
|
|
552 }
|
|
|
553 else {
|
|
|
554 $self->useFontConfig(1);
|
|
|
555 my @mbounds = GD::Image->stringFT($self->fgcolor,$font,
|
|
|
556 $self->fontsize,0,
|
|
|
557 0,0,'m');
|
|
|
558 my $xheight = $mbounds[3]-$mbounds[5];
|
|
|
559 my @jbounds = GD::Image->stringFT($self->fgcolor,$font,
|
|
|
560 $self->fontsize,0,
|
|
|
561 0,0,'j');
|
|
|
562 my $ascent = $mbounds[7]-$jbounds[7];
|
|
|
563 my $descent = $jbounds[3]-$mbounds[3];
|
|
|
564
|
|
|
565 my @mmbounds = GD::Image->stringFT($self->fgcolor,$font,
|
|
|
566 $self->fontsize,0,
|
|
|
567 0,0,"m\nm");
|
|
|
568 my $twolines = $mmbounds[3]-$mmbounds[5];
|
|
|
569 my $lineheight = $twolines - 2*$xheight;
|
|
|
570 my $leading = $lineheight - $ascent - $descent;
|
|
|
571 $metrics = {ascent => $ascent,
|
|
|
572 descent => $descent,
|
|
|
573 lineheight => $lineheight,
|
|
|
574 xheight => $xheight,
|
|
|
575 leading => $leading};
|
|
|
576 }
|
|
|
577
|
|
|
578 if ((my $string = shift) && wantarray) {
|
|
|
579 my ($width,$height) = $self->stringBounds($string);
|
|
|
580 return ($metrics,abs($width),abs($height));
|
|
|
581 }
|
|
|
582 return $metrics;
|
|
|
583 }
|
|
|
584
|
|
|
585 =item ($delta_x,$delta_y)= $img->stringBounds($string)
|
|
|
586
|
|
|
587 This method indicates the X and Y offsets (which may be negative) that
|
|
|
588 will occur when the given string is drawn using the current font,
|
|
|
589 fontsize and angle. When the string is drawn horizontally, it gives
|
|
|
590 the width and height of the string's bounding box.
|
|
|
591
|
|
|
592 =cut
|
|
|
593
|
|
|
594 sub stringBounds {
|
|
|
595 my $self = shift;
|
|
|
596 my $string = shift;
|
|
|
597 my $font = $self->font;
|
|
|
598 if (ref $font && $font->isa('GD::Font')) {
|
|
|
599 if ($self->angle == -90) {
|
|
|
600 return ($font->height,-length($string) * $font->width);
|
|
|
601 } else {
|
|
|
602 return (length($string) * $font->width,$font->height);
|
|
|
603 }
|
|
|
604 }
|
|
|
605 else {
|
|
|
606 $self->useFontConfig(1);
|
|
|
607 my @bounds = GD::Image->stringFT($self->fgcolor,$font,
|
|
|
608 $self->fontsize,-deg2rad($self->angle),
|
|
|
609 $self->curPos,$string);
|
|
|
610 return $self->_string_width(@bounds);
|
|
|
611 }
|
|
|
612 }
|
|
|
613
|
|
|
614 =item $delta_x = $img->stringWidth($string)
|
|
|
615
|
|
|
616 This method indicates the width of the string given the current font,
|
|
|
617 fontsize and angle. It is the same as ($img->stringBounds($string))[0]
|
|
|
618
|
|
|
619 =cut
|
|
|
620
|
|
|
621 sub stringWidth {
|
|
|
622 return ((shift->stringBounds(@_))[0]);
|
|
|
623 }
|
|
|
624
|
|
|
625
|
|
|
626 sub _string_width {
|
|
|
627 my $self = shift;
|
|
|
628 my @bounds = @_;
|
|
|
629 my $delta_x = abs($bounds[2]-$bounds[0]);
|
|
|
630 my $delta_y = abs($bounds[5]-$bounds[3]);
|
|
|
631 my $angle = $self->angle % 360;
|
|
|
632 if ($angle >= 0 && $angle < 90) {
|
|
|
633 return ($delta_x,$delta_y);
|
|
|
634
|
|
|
635 } elsif ($angle >= 90 && $angle < 180) {
|
|
|
636 return (-$delta_x,$delta_y);
|
|
|
637
|
|
|
638 } elsif ($angle >= 180 && $angle < 270) {
|
|
|
639 return (-$delta_x,-$delta_y);
|
|
|
640
|
|
|
641 } elsif ($angle >= 270 && $angle < 360) {
|
|
|
642 return ($delta_x,-$delta_y);
|
|
|
643 }
|
|
|
644 }
|
|
|
645
|
|
|
646 =item ($x,$y) = $img->curPos
|
|
|
647
|
|
|
648 Return the current position of the pen. Set the current position
|
|
|
649 using moveTo().
|
|
|
650
|
|
|
651 =cut
|
|
|
652
|
|
|
653 sub curPos { @{shift->{xy}}; }
|
|
|
654
|
|
|
655 =item $font = $img->font([$newfont] [,$newsize])
|
|
|
656
|
|
|
657 Get or set the current font. Fonts can be GD::Font objects, TrueType
|
|
|
658 font file paths, or fontconfig font patterns like "Times:italic" (see
|
|
|
659 L<fontconfig>). The latter feature requires that you have the
|
|
|
660 fontconfig library installed and are using libgd version 2.0.33 or
|
|
|
661 higher.
|
|
|
662
|
|
|
663 As a shortcut, you may pass two arguments to set the font and the
|
|
|
664 fontsize simultaneously. The fontsize is only valid when drawing with
|
|
|
665 TrueType fonts.
|
|
|
666
|
|
|
667 =cut
|
|
|
668
|
|
|
669 sub font {
|
|
|
670 my $self = shift;
|
|
|
671 $self->{font} = shift if @_;
|
|
|
672 $self->{fontsize} = shift if @_;
|
|
|
673 $self->{font};
|
|
|
674 }
|
|
|
675
|
|
|
676 =item $size = $img->fontsize([$newfontsize])
|
|
|
677
|
|
|
678 Get or set the current font size. This is only valid for TrueType
|
|
|
679 fonts.
|
|
|
680
|
|
|
681 =cut
|
|
|
682
|
|
|
683 sub fontsize {
|
|
|
684 my $self = shift;
|
|
|
685 $self->{fontsize} = shift if @_;
|
|
|
686 $self->{fontsize};
|
|
|
687 }
|
|
|
688
|
|
|
689 =item $size = $img->penSize([$newpensize])
|
|
|
690
|
|
|
691 Get or set the current pen width for use during line drawing
|
|
|
692 operations.
|
|
|
693
|
|
|
694 =cut
|
|
|
695
|
|
|
696 sub penSize {
|
|
|
697 my $self = shift;
|
|
|
698 if (@_) {
|
|
|
699 $self->{pensize} = shift;
|
|
|
700 $self->gd->setThickness($self->{pensize});
|
|
|
701 }
|
|
|
702 $self->{pensize};
|
|
|
703 }
|
|
|
704
|
|
|
705 =item $angle = $img->angle([$newangle])
|
|
|
706
|
|
|
707 Set the current angle for use when calling line() or move() with a
|
|
|
708 single argument.
|
|
|
709
|
|
|
710 Here is an example of using turn() and angle() together to draw an
|
|
|
711 octagon. The first line drawn is the downward-slanting top right
|
|
|
712 edge. The last line drawn is the horizontal top of the octagon.
|
|
|
713
|
|
|
714 $img->moveTo(200,50);
|
|
|
715 $img->angle(0);
|
|
|
716 $img->turn(360/8);
|
|
|
717 for (1..8) { $img->line(50) }
|
|
|
718
|
|
|
719 =cut
|
|
|
720
|
|
|
721 sub angle {
|
|
|
722 my $self = shift;
|
|
|
723 $self->{angle} = shift if @_;
|
|
|
724 $self->{angle};
|
|
|
725 }
|
|
|
726
|
|
|
727 =item $angle = $img->turn([$newangle])
|
|
|
728
|
|
|
729 Get or set the current angle to turn prior to drawing lines. This
|
|
|
730 value is only used when calling line() or move() with a single
|
|
|
731 argument. The turning angle will be applied to each call to line() or
|
|
|
732 move() just before the actual drawing occurs.
|
|
|
733
|
|
|
734 Angles are in degrees. Positive values turn the angle clockwise.
|
|
|
735
|
|
|
736 =cut
|
|
|
737
|
|
|
738 # degrees, not radians
|
|
|
739 sub turn {
|
|
|
740 my $self = shift;
|
|
|
741 $self->{turningangle} = shift if @_;
|
|
|
742 $self->{turningangle};
|
|
|
743 }
|
|
|
744
|
|
|
745 =item $color = $img->fgcolor([$newcolor])
|
|
|
746
|
|
|
747 Get or set the pen's foreground color. The current pen color can be
|
|
|
748 set by (1) using an (r,g,b) triple; (2) using a previously-allocated
|
|
|
749 color from the GD palette; or (3) by using a symbolic color name such
|
|
|
750 as "chartreuse." The list of color names can be obtained using
|
|
|
751 color_names(). The special color name 'transparent' will create a
|
|
|
752 completely transparent color.
|
|
|
753
|
|
|
754 =cut
|
|
|
755
|
|
|
756 sub fgcolor {
|
|
|
757 my $self = shift;
|
|
|
758 $self->{fgcolor} = $self->translate_color(@_) if @_;
|
|
|
759 $self->{fgcolor};
|
|
|
760 }
|
|
|
761
|
|
|
762 =item $color = $img->bgcolor([$newcolor])
|
|
|
763
|
|
|
764 Get or set the pen's background color. The current pen color can be
|
|
|
765 set by (1) using an (r,g,b) triple; (2) using a previously-allocated
|
|
|
766 color from the GD palette; or (3) by using a symbolic color name such
|
|
|
767 as "chartreuse." The list of color names can be obtained using
|
|
|
768 color_names(). The special color name 'transparent' will create a
|
|
|
769 completely transparent color.
|
|
|
770
|
|
|
771 =cut
|
|
|
772
|
|
|
773 sub bgcolor {
|
|
|
774 my $self = shift;
|
|
|
775 $self->{bgcolor} = $self->translate_color(@_) if @_;
|
|
|
776 $self->{bgcolor};
|
|
|
777 }
|
|
|
778
|
|
|
779 =item $index = $img->translate_color(@args)
|
|
|
780
|
|
|
781 Translates a color into a GD palette or TrueColor index. You may pass
|
|
|
782 either an (r,g,b) triple or a symbolic color name. If you pass a
|
|
|
783 previously-allocated index, the method will return it unchanged.
|
|
|
784
|
|
|
785 =cut
|
|
|
786
|
|
|
787 sub translate_color {
|
|
|
788 my $self = shift;
|
|
|
789 return unless defined $_[0];
|
|
|
790 my ($r,$g,$b);
|
|
|
791 if (@_ == 1 && $_[0] =~ /^-?\d+/) { # previously allocated index
|
|
|
792 return $_[0];
|
|
|
793 }
|
|
|
794 elsif (@_ == 3) { # (rgb triplet)
|
|
|
795 ($r,$g,$b) = @_;
|
|
|
796 }
|
|
|
797 elsif (lc $_[0] eq 'transparent') {
|
|
|
798 return $TRANSPARENT ||= $self->alphaColor('white',127);
|
|
|
799 }
|
|
|
800 else {
|
|
|
801 $self->read_color_table unless %COLORS;
|
|
|
802 die "unknown color" unless exists $COLORS{lc $_[0]};
|
|
|
803 ($r,$g,$b) = @{$COLORS{lc $_[0]}};
|
|
|
804 }
|
|
|
805 return $self->colorResolve($r,$g,$b);
|
|
|
806 }
|
|
|
807
|
|
|
808 sub transparent {
|
|
|
809 my $self = shift;
|
|
|
810 my $index = $self->translate_color(@_);
|
|
|
811 $self->gd->transparent($index);
|
|
|
812 }
|
|
|
813
|
|
|
814 =item $index = $img->alphaColor(@args,$alpha)
|
|
|
815
|
|
|
816 Creates an alpha color. You may pass either an (r,g,b) triple or a
|
|
|
817 symbolic color name, followed by an integer indicating its
|
|
|
818 opacity. The opacity value ranges from 0 (fully opaque) to 127 (fully
|
|
|
819 transparent).
|
|
|
820
|
|
|
821 =cut
|
|
|
822
|
|
|
823 sub alphaColor {
|
|
|
824 my $self = shift;
|
|
|
825 return unless defined $_[0];
|
|
|
826 my ($r,$g,$b,$a);
|
|
|
827 if (@_ == 4) { # (rgb triplet)
|
|
|
828 ($r,$g,$b,$a) = @_;
|
|
|
829 } else {
|
|
|
830 $self->read_color_table unless %COLORS;
|
|
|
831 die "unknown color" unless exists $COLORS{lc $_[0]};
|
|
|
832 ($r,$g,$b) = @{$COLORS{lc $_[0]}};
|
|
|
833 $a = $_[1];
|
|
|
834 }
|
|
|
835 return $self->colorAllocateAlpha($r,$g,$b,$a);
|
|
|
836 }
|
|
|
837
|
|
|
838 =item @names = GD::Simple->color_names
|
|
|
839
|
|
|
840 =item $translate_table = GD::Simple->color_names
|
|
|
841
|
|
|
842 Called in a list context, color_names() returns the list of symbolic
|
|
|
843 color names recognized by this module. Called in a scalar context,
|
|
|
844 the method returns a hash reference in which the keys are the color
|
|
|
845 names and the values are array references containing [r,g,b] triples.
|
|
|
846
|
|
|
847 =cut
|
|
|
848
|
|
|
849 sub color_names {
|
|
|
850 my $self = shift;
|
|
|
851 $self->read_color_table unless %COLORS;
|
|
|
852 return wantarray ? sort keys %COLORS : \%COLORS;
|
|
|
853 }
|
|
|
854
|
|
|
855 =item $gd = $img->gd
|
|
|
856
|
|
|
857 Return the internal GD::Image object. Usually you will not need to
|
|
|
858 call this since all GD methods are automatically referred to this object.
|
|
|
859
|
|
|
860 =cut
|
|
|
861
|
|
|
862 sub gd { shift->{gd} }
|
|
|
863
|
|
|
864 sub read_color_table {
|
|
|
865 my $class = shift;
|
|
|
866 while (<DATA>) {
|
|
|
867 chomp;
|
|
|
868 last if /^__END__/;
|
|
|
869 my ($name,$r,$g,$b) = split /\s+/;
|
|
|
870 $COLORS{$name} = [hex $r,hex $g,hex $b];
|
|
|
871 }
|
|
|
872 }
|
|
|
873
|
|
|
874 sub setBrush {
|
|
|
875 my $self = shift;
|
|
|
876 my $brush = shift;
|
|
|
877 if ($brush->isa('GD::Simple')) {
|
|
|
878 $self->gd->setBrush($brush->gd);
|
|
|
879 } else {
|
|
|
880 $self->gd->setBrush($brush);
|
|
|
881 }
|
|
|
882 }
|
|
|
883
|
|
|
884 =item ($red,$green,$blue) = GD::Simple->HSVtoRGB($hue,$saturation,$value)
|
|
|
885
|
|
|
886 Convert a Hue/Saturation/Value (HSV) color into an RGB triple. The
|
|
|
887 hue, saturation and value are integers from 0 to 255.
|
|
|
888
|
|
|
889 =cut
|
|
|
890
|
|
|
891 sub HSVtoRGB {
|
|
|
892 my $self = shift;
|
|
|
893 @_ == 3 or croak "Usage: GD::Simple->HSVtoRGB(\$hue,\$saturation,\$value)";
|
|
|
894
|
|
|
895 my ($h,$s,$v)=@_;
|
|
|
896 my ($r,$g,$b,$i,$f,$p,$q,$t);
|
|
|
897
|
|
|
898 if( $s == 0 ) {
|
|
|
899 ## achromatic (grey)
|
|
|
900 return ($v,$v,$v);
|
|
|
901 }
|
|
|
902 $h %= 255;
|
|
|
903 $s /= 255; ## scale saturation from 0.0-1.0
|
|
|
904 $h /= 255; ## scale hue from 0 to 1.0
|
|
|
905 $h *= 360; ## and now scale it to 0 to 360
|
|
|
906
|
|
|
907 $h /= 60; ## sector 0 to 5
|
|
|
908 $i = $h % 6;
|
|
|
909 $f = $h - $i; ## factorial part of h
|
|
|
910 $p = $v * ( 1 - $s );
|
|
|
911 $q = $v * ( 1 - $s * $f );
|
|
|
912 $t = $v * ( 1 - $s * ( 1 - $f ) );
|
|
|
913
|
|
|
914 if($i<1) {
|
|
|
915 $r = $v;
|
|
|
916 $g = $t;
|
|
|
917 $b = $p;
|
|
|
918 } elsif($i<2){
|
|
|
919 $r = $q;
|
|
|
920 $g = $v;
|
|
|
921 $b = $p;
|
|
|
922 } elsif($i<3){
|
|
|
923 $r = $p;
|
|
|
924 $g = $v;
|
|
|
925 $b = $t;
|
|
|
926 } elsif($i<4){
|
|
|
927 $r = $p;
|
|
|
928 $g = $q;
|
|
|
929 $b = $v;
|
|
|
930 } elsif($i<5){
|
|
|
931 $r = $t;
|
|
|
932 $g = $p;
|
|
|
933 $b = $v;
|
|
|
934 } else {
|
|
|
935 $r = $v;
|
|
|
936 $g = $p;
|
|
|
937 $b = $q;
|
|
|
938 }
|
|
|
939 return (int($r+0.5),int($g+0.5),int($b+0.5));
|
|
|
940 }
|
|
|
941
|
|
|
942 =item ($hue,$saturation,$value) = GD::Simple->RGBtoHSV($hue,$saturation,$value)
|
|
|
943
|
|
|
944 Convert a Red/Green/Blue (RGB) value into a Hue/Saturation/Value (HSV)
|
|
|
945 triple. The hue, saturation and value are integers from 0 to 255.
|
|
|
946
|
|
|
947 =back
|
|
|
948
|
|
|
949 =cut
|
|
|
950
|
|
|
951 sub RGBtoHSV {
|
|
|
952 my $self = shift;
|
|
|
953 my ($r, $g ,$bl) = @_;
|
|
|
954 my ($min,undef,$max) = sort {$a<=>$b} ($r,$g,$bl);
|
|
|
955 return (0,0,0) unless $max > 0;
|
|
|
956
|
|
|
957 my $v = $max;
|
|
|
958 my $s = 255 * ($max - $min)/$max;
|
|
|
959 my $h;
|
|
|
960 my $range = $max - $min;
|
|
|
961
|
|
|
962 if ($range == 0) { # all colors are equal, so monochrome
|
|
|
963 return (0,0,$max);
|
|
|
964 }
|
|
|
965
|
|
|
966 if ($max == $r) {
|
|
|
967 $h = 60 * ($g-$bl)/$range;
|
|
|
968 }
|
|
|
969 elsif ($max == $g) {
|
|
|
970 $h = 60 * ($bl-$r)/$range + 120;
|
|
|
971 }
|
|
|
972 else {
|
|
|
973 $h = 60 * ($r-$g)/$range + 240;
|
|
|
974 }
|
|
|
975
|
|
|
976 $h = int($h*255/360 + 0.5);
|
|
|
977
|
|
|
978 return ($h, $s, $v);
|
|
|
979 }
|
|
|
980
|
|
|
981 sub newGroup {
|
|
|
982 my $self = shift;
|
|
|
983 return $self->GD::newGroup(@_);
|
|
|
984 }
|
|
|
985
|
|
|
986 1;
|
|
|
987
|
|
|
988 __DATA__
|
|
|
989 white FF FF FF
|
|
|
990 black 00 00 00
|
|
|
991 aliceblue F0 F8 FF
|
|
|
992 antiquewhite FA EB D7
|
|
|
993 aqua 00 FF FF
|
|
|
994 aquamarine 7F FF D4
|
|
|
995 azure F0 FF FF
|
|
|
996 beige F5 F5 DC
|
|
|
997 bisque FF E4 C4
|
|
|
998 blanchedalmond FF EB CD
|
|
|
999 blue 00 00 FF
|
|
|
1000 blueviolet 8A 2B E2
|
|
|
1001 brown A5 2A 2A
|
|
|
1002 burlywood DE B8 87
|
|
|
1003 cadetblue 5F 9E A0
|
|
|
1004 chartreuse 7F FF 00
|
|
|
1005 chocolate D2 69 1E
|
|
|
1006 coral FF 7F 50
|
|
|
1007 cornflowerblue 64 95 ED
|
|
|
1008 cornsilk FF F8 DC
|
|
|
1009 crimson DC 14 3C
|
|
|
1010 cyan 00 FF FF
|
|
|
1011 darkblue 00 00 8B
|
|
|
1012 darkcyan 00 8B 8B
|
|
|
1013 darkgoldenrod B8 86 0B
|
|
|
1014 darkgray A9 A9 A9
|
|
|
1015 darkgreen 00 64 00
|
|
|
1016 darkkhaki BD B7 6B
|
|
|
1017 darkmagenta 8B 00 8B
|
|
|
1018 darkolivegreen 55 6B 2F
|
|
|
1019 darkorange FF 8C 00
|
|
|
1020 darkorchid 99 32 CC
|
|
|
1021 darkred 8B 00 00
|
|
|
1022 darksalmon E9 96 7A
|
|
|
1023 darkseagreen 8F BC 8F
|
|
|
1024 darkslateblue 48 3D 8B
|
|
|
1025 darkslategray 2F 4F 4F
|
|
|
1026 darkturquoise 00 CE D1
|
|
|
1027 darkviolet 94 00 D3
|
|
|
1028 deeppink FF 14 100
|
|
|
1029 deepskyblue 00 BF FF
|
|
|
1030 dimgray 69 69 69
|
|
|
1031 dodgerblue 1E 90 FF
|
|
|
1032 firebrick B2 22 22
|
|
|
1033 floralwhite FF FA F0
|
|
|
1034 forestgreen 22 8B 22
|
|
|
1035 fuchsia FF 00 FF
|
|
|
1036 gainsboro DC DC DC
|
|
|
1037 ghostwhite F8 F8 FF
|
|
|
1038 gold FF D7 00
|
|
|
1039 goldenrod DA A5 20
|
|
|
1040 gray 80 80 80
|
|
|
1041 green 00 80 00
|
|
|
1042 greenyellow AD FF 2F
|
|
|
1043 honeydew F0 FF F0
|
|
|
1044 hotpink FF 69 B4
|
|
|
1045 indianred CD 5C 5C
|
|
|
1046 indigo 4B 00 82
|
|
|
1047 ivory FF FF F0
|
|
|
1048 khaki F0 E6 8C
|
|
|
1049 lavender E6 E6 FA
|
|
|
1050 lavenderblush FF F0 F5
|
|
|
1051 lawngreen 7C FC 00
|
|
|
1052 lemonchiffon FF FA CD
|
|
|
1053 lightblue AD D8 E6
|
|
|
1054 lightcoral F0 80 80
|
|
|
1055 lightcyan E0 FF FF
|
|
|
1056 lightgoldenrodyellow FA FA D2
|
|
|
1057 lightgreen 90 EE 90
|
|
|
1058 lightgrey D3 D3 D3
|
|
|
1059 lightpink FF B6 C1
|
|
|
1060 lightsalmon FF A0 7A
|
|
|
1061 lightseagreen 20 B2 AA
|
|
|
1062 lightskyblue 87 CE FA
|
|
|
1063 lightslategray 77 88 99
|
|
|
1064 lightsteelblue B0 C4 DE
|
|
|
1065 lightyellow FF FF E0
|
|
|
1066 lime 00 FF 00
|
|
|
1067 limegreen 32 CD 32
|
|
|
1068 linen FA F0 E6
|
|
|
1069 magenta FF 00 FF
|
|
|
1070 maroon 80 00 00
|
|
|
1071 mediumaquamarine 66 CD AA
|
|
|
1072 mediumblue 00 00 CD
|
|
|
1073 mediumorchid BA 55 D3
|
|
|
1074 mediumpurple 100 70 DB
|
|
|
1075 mediumseagreen 3C B3 71
|
|
|
1076 mediumslateblue 7B 68 EE
|
|
|
1077 mediumspringgreen 00 FA 9A
|
|
|
1078 mediumturquoise 48 D1 CC
|
|
|
1079 mediumvioletred C7 15 85
|
|
|
1080 midnightblue 19 19 70
|
|
|
1081 mintcream F5 FF FA
|
|
|
1082 mistyrose FF E4 E1
|
|
|
1083 moccasin FF E4 B5
|
|
|
1084 navajowhite FF DE AD
|
|
|
1085 navy 00 00 80
|
|
|
1086 oldlace FD F5 E6
|
|
|
1087 olive 80 80 00
|
|
|
1088 olivedrab 6B 8E 23
|
|
|
1089 orange FF A5 00
|
|
|
1090 orangered FF 45 00
|
|
|
1091 orchid DA 70 D6
|
|
|
1092 palegoldenrod EE E8 AA
|
|
|
1093 palegreen 98 FB 98
|
|
|
1094 paleturquoise AF EE EE
|
|
|
1095 palevioletred DB 70 100
|
|
|
1096 papayawhip FF EF D5
|
|
|
1097 peachpuff FF DA B9
|
|
|
1098 peru CD 85 3F
|
|
|
1099 pink FF C0 CB
|
|
|
1100 plum DD A0 DD
|
|
|
1101 powderblue B0 E0 E6
|
|
|
1102 purple 80 00 80
|
|
|
1103 red FF 00 00
|
|
|
1104 rosybrown BC 8F 8F
|
|
|
1105 royalblue 41 69 E1
|
|
|
1106 saddlebrown 8B 45 13
|
|
|
1107 salmon FA 80 72
|
|
|
1108 sandybrown F4 A4 60
|
|
|
1109 seagreen 2E 8B 57
|
|
|
1110 seashell FF F5 EE
|
|
|
1111 sienna A0 52 2D
|
|
|
1112 silver C0 C0 C0
|
|
|
1113 skyblue 87 CE EB
|
|
|
1114 slateblue 6A 5A CD
|
|
|
1115 slategray 70 80 90
|
|
|
1116 snow FF FA FA
|
|
|
1117 springgreen 00 FF 7F
|
|
|
1118 steelblue 46 82 B4
|
|
|
1119 tan D2 B4 8C
|
|
|
1120 teal 00 80 80
|
|
|
1121 thistle D8 BF D8
|
|
|
1122 tomato FF 63 47
|
|
|
1123 turquoise 40 E0 D0
|
|
|
1124 violet EE 82 EE
|
|
|
1125 wheat F5 DE B3
|
|
|
1126 whitesmoke F5 F5 F5
|
|
|
1127 yellow FF FF 00
|
|
|
1128 yellowgreen 9A CD 32
|
|
|
1129 gradient1 00 ff 00
|
|
|
1130 gradient2 0a ff 00
|
|
|
1131 gradient3 14 ff 00
|
|
|
1132 gradient4 1e ff 00
|
|
|
1133 gradient5 28 ff 00
|
|
|
1134 gradient6 32 ff 00
|
|
|
1135 gradient7 3d ff 00
|
|
|
1136 gradient8 47 ff 00
|
|
|
1137 gradient9 51 ff 00
|
|
|
1138 gradient10 5b ff 00
|
|
|
1139 gradient11 65 ff 00
|
|
|
1140 gradient12 70 ff 00
|
|
|
1141 gradient13 7a ff 00
|
|
|
1142 gradient14 84 ff 00
|
|
|
1143 gradient15 8e ff 00
|
|
|
1144 gradient16 99 ff 00
|
|
|
1145 gradient17 a3 ff 00
|
|
|
1146 gradient18 ad ff 00
|
|
|
1147 gradient19 b7 ff 00
|
|
|
1148 gradient20 c1 ff 00
|
|
|
1149 gradient21 cc ff 00
|
|
|
1150 gradient22 d6 ff 00
|
|
|
1151 gradient23 e0 ff 00
|
|
|
1152 gradient24 ea ff 00
|
|
|
1153 gradient25 f4 ff 00
|
|
|
1154 gradient26 ff ff 00
|
|
|
1155 gradient27 ff f4 00
|
|
|
1156 gradient28 ff ea 00
|
|
|
1157 gradient29 ff e0 00
|
|
|
1158 gradient30 ff d6 00
|
|
|
1159 gradient31 ff cc 00
|
|
|
1160 gradient32 ff c1 00
|
|
|
1161 gradient33 ff b7 00
|
|
|
1162 gradient34 ff ad 00
|
|
|
1163 gradient35 ff a3 00
|
|
|
1164 gradient36 ff 99 00
|
|
|
1165 gradient37 ff 8e 00
|
|
|
1166 gradient38 ff 84 00
|
|
|
1167 gradient39 ff 7a 00
|
|
|
1168 gradient40 ff 70 00
|
|
|
1169 gradient41 ff 65 00
|
|
|
1170 gradient42 ff 5b 00
|
|
|
1171 gradient43 ff 51 00
|
|
|
1172 gradient44 ff 47 00
|
|
|
1173 gradient45 ff 3d 00
|
|
|
1174 gradient46 ff 32 00
|
|
|
1175 gradient47 ff 28 00
|
|
|
1176 gradient48 ff 1e 00
|
|
|
1177 gradient49 ff 14 00
|
|
|
1178 gradient50 ff 0a 00
|
|
|
1179 __END__
|
|
|
1180
|
|
|
1181 =head1 COLORS
|
|
|
1182
|
|
|
1183 This script will create an image showing all the symbolic colors.
|
|
|
1184
|
|
|
1185 #!/usr/bin/perl
|
|
|
1186
|
|
|
1187 use strict;
|
|
|
1188 use GD::Simple;
|
|
|
1189
|
|
|
1190 my @color_names = GD::Simple->color_names;
|
|
|
1191 my $cols = int(sqrt(@color_names));
|
|
|
1192 my $rows = int(@color_names/$cols)+1;
|
|
|
1193
|
|
|
1194 my $cell_width = 100;
|
|
|
1195 my $cell_height = 50;
|
|
|
1196 my $legend_height = 16;
|
|
|
1197 my $width = $cols * $cell_width;
|
|
|
1198 my $height = $rows * $cell_height;
|
|
|
1199
|
|
|
1200 my $img = GD::Simple->new($width,$height);
|
|
|
1201 $img->font(gdSmallFont);
|
|
|
1202
|
|
|
1203 for (my $c=0; $c<$cols; $c++) {
|
|
|
1204 for (my $r=0; $r<$rows; $r++) {
|
|
|
1205 my $color = $color_names[$c*$rows + $r] or next;
|
|
|
1206 my @topleft = ($c*$cell_width,$r*$cell_height);
|
|
|
1207 my @botright = ($topleft[0]+$cell_width,$topleft[1]+$cell_height-$legend_height);
|
|
|
1208 $img->bgcolor($color);
|
|
|
1209 $img->fgcolor($color);
|
|
|
1210 $img->rectangle(@topleft,@botright);
|
|
|
1211 $img->moveTo($topleft[0]+2,$botright[1]+$legend_height-2);
|
|
|
1212 $img->fgcolor('black');
|
|
|
1213 $img->string($color);
|
|
|
1214 }
|
|
|
1215 }
|
|
|
1216
|
|
|
1217 print $img->png;
|
|
|
1218
|
|
|
1219 =head1 AUTHOR
|
|
|
1220
|
|
|
1221 The GD::Simple module is copyright 2004, Lincoln D. Stein. It is
|
|
|
1222 distributed under the same terms as Perl itself. See the "Artistic
|
|
|
1223 License" in the Perl source code distribution for licensing terms.
|
|
|
1224
|
|
|
1225 The latest versions of GD.pm are available at
|
|
|
1226
|
|
|
1227 http://stein.cshl.org/WWW/software/GD
|
|
|
1228
|
|
|
1229 =head1 SEE ALSO
|
|
|
1230
|
|
|
1231 L<GD>,
|
|
|
1232 L<GD::Polyline>,
|
|
|
1233 L<GD::SVG>,
|
|
|
1234 L<Image::Magick>
|
|
|
1235
|
|
|
1236 =cut
|
