- Modifications to compile ImageMagick

ImageMagick/PerlMagick/demo/single-pixels.pl

@@ -0,0 +1,48 @@
+#!/usr/bin/perl
+#
+# Methods for to Get and Set single pixels in images using PerlMagick
+#
+use strict;
+use Image::Magick;
+
+# read image
+my $im=Image::Magick->new();
+$im->Read('logo:');
+
+# ---
+
+# Get/Set a single pixel as a string
+my $skin=$im->Get('pixel[400,200]');
+print "Get('pixel[x,y]') = ", $skin, "\n";
+
+$im->Set('pixel[1,1]'=>'0,0,0,0');
+$im->Set('pixel[2,1]'=>$skin);
+$im->Set('pixel[3,1]'=>'green');
+$im->Set('pixel[4,1]'=>'rgb(255,0,255)');
+
+# ---
+
+# More direct single pixel access
+my @pixel = $im->GetPixel( x=>400, y=>200 );
+print "GetPixel() = ", "@pixel", "\n";
+
+# modify the pixel values (as normalized floats)
+$pixel[0] = $pixel[0]/2;      # darken red value
+$pixel[1] = 0.0;              # junk green value
+$pixel[2] = 0.0;              # junk blue value
+
+# write pixel to destination
+# (quantization and clipping happens here)
+$im->SetPixel(x=>5,y=>1,color=>\@pixel);
+
+# ---
+
+# crop, scale, display the changed pixels
+$im->Crop(geometry=>'7x3+0+0');
+$im->Set(page=>'0x0+0+0');
+$im->Scale('1000%');
+
+# Output the changed pixels
+$im->Write('win:');
+$im->Write('single-pixels.gif');
+