This GD example program demonstrates the code for an example program that demonstrates how to draw built-in antialiased lines with GD and create a png image.
<?php // Create an anti-aliased image and a normal image $qImageAA = ImageCreateTrueColor(400, 100); $qImageNormal = ImageCreateTrueColor(200, 100); // Switch antialiasing on for one image ImageAntialias($qImageAA, true); // Allocate a red color for each image $qRedAA = ImageColorAllocate($qImageAA, 255, 0, 0); $qRedNormal = ImageColorAllocate($qImageNormal, 255, 0, 0); // Draw several pairs of lines, with AA and without ImageLine($qImageAA, 0, 0, 200, 10, $qRedAA); ImageLine($qImageAA, 0, 0, 200, 30, $qRedAA); ImageLine($qImageAA, 0, 0, 200, 50, $qRedAA); ImageLine($qImageAA, 0, 0, 200, 70, $qRedAA); ImageLine($qImageAA, 0, 0, 200, 100, $qRedAA); ImageLine($qImageAA, 0, 0, 150, 100, $qRedAA); ImageLine($qImageAA, 0, 0, 100, 100, $qRedAA); ImageLine($qImageAA, 0, 0, 50, 100, $qRedAA); ImageLine($qImageAA, 0, 0, 30, 100, $qRedAA); ImageLine($qImageAA, 0, 0, 10, 100, $qRedAA); ImageLine($qImageNormal, 0, 0, 200, 10, $qRedNormal); ImageLine($qImageNormal, 0, 0, 200, 30, $qRedNormal); ImageLine($qImageNormal, 0, 0, 200, 50, $qRedNormal); ImageLine($qImageNormal, 0, 0, 200, 70, $qRedNormal); ImageLine($qImageNormal, 0, 0, 200, 100, $qRedNormal); ImageLine($qImageNormal, 0, 0, 150, 100, $qRedNormal); ImageLine($qImageNormal, 0, 0, 100, 100, $qRedNormal); ImageLine($qImageNormal, 0, 0, 50, 100, $qRedNormal); ImageLine($qImageNormal, 0, 0, 30, 100, $qRedNormal); ImageLine($qImageNormal, 0, 0, 10, 100, $qRedNormal); // Merge the two images side by side for output (AA: left, Normal: Right) ImageCopyMerge($qImageAA, $qImageNormal, 200, 0, 0, 0, 200, 100, 100); // Output image Header('Content-type: image/png'); ImagePNG($qImageAA); ImageDestroy($qImageAA); ImageDestroy($qImageNormal); ?>
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