Req #28761 [Opn]: thick line endings drawn with imageline() are ugly

From: Date: Mon, 07 Sep 2015 17:19:30 +0000
Subject: Req #28761 [Opn]: thick line endings drawn with imageline() are ugly
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=28761&edit=1 ID: 28761 Updated by: cmb@php.net Reported by: odarcan at hotmail dot com -Summary: lines drawn with imageline() are ugly +Summary: thick line endings drawn with imageline() are ugly Status: Open Type: Feature/Change Request -Package: Feature/Change Request +Package: GD related Operating System: win xp PHP Version: Irrelevant Block user comment: N Private report: N New Comment: I agree that this should be improved. Furthermore being able to choose the desired line-caps ("butt", "round", "square") would be nice. Previous Comments: ------------------------------------------------------------------------ [2004-06-13 06:18:48] odarcan at hotmail dot com clarification: the uglyness appears in the junctions of different lines when the first one's ending coords. is the second one's beginning coords., the drawn lines should be more seamless ------------------------------------------------------------------------ [2004-06-13 06:13:25] odarcan at hotmail dot com Description: ------------ i dont think this is a bug, it may be, and i dont know if reporting this here will do any good, when drawing lines in gd, other than 90degree angles; the endings of the lines always become horisontal and it looks really, REALLY cheap! it doesnt show when the lines are 1 pixel wide but when drawing thicker lines, it becomes VERY obvious, this is my greatest obstacle in my project right now, ive emailed boutell.com but got no answer. thanks, Osman Darcan Reproduce code: --------------- <? $im = imagecreate(400, 400) or die ("Cannot Initialize new GD image stream"); header ("Content-type: image/png"); $grey = imagecolorallocate ($im, 155, 155, 155); $blue = imagecolorallocate ($im, 0, 0, 255); $green = imagecolorallocate ($im, 0, 155, 0); imagesetthickness($im,9); imageline($im,5,5,50,50,$blue); imageline($im,50,50,100,300,$blue); imageline($im,100,300,300,40,$blue); imageline($im,5+20,5+20,50+20,50+20,$green); imageline($im,50+20,50+20,60+20,300+20,$green); imageline($im,100+20,300+20,300+20,40+20,$green); imagepng($im,"",60); ?> Expected result: ---------------- try different values for imagesetthickness Actual result: -------------- you'll see that some lines look very weird.. im not sure its a bug but it's sure ugly allright.. php and gd deserves something as simple as a decent option to set thickness to lines.. shouldnt be so hard to implement? ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=28761&edit=1

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