Bug #55332 [Bgs]: imagefilledarc renders alpha transparency wrong

Edit report at https://bugs.php.net/bug.php?id=55332&edit=1 ID: 55332 User updated by: evi1m4chine at googlemail dot com Reported by: evi1m4chine at googlemail dot com Summary: imagefilledarc renders alpha transparency wrong Status: Bogus Type: Bug Package: GD related Operating System: Linux(x86)/GNU/Gentoo(Hardened) PHP Version: 5.3.6 Block user comment: N Private report: N New Comment: Yeah? Which one do you mean? Since you still didn’t link to any. Because the only ones I found, were at least 4-9 years old, and only vaguely and/or badly describing something like this. Face it: They are abandoned. :P Previous Comments: ------------------------------------------------------------------------ [2011-08-01 13:11:00] pajoye@php.net it is not abandoned only not fixed. ------------------------------------------------------------------------ [2011-08-01 13:05:00] evi1m4chine at googlemail dot com You didn’t even care to mark it as duplicate of whatever you think is the already existing bug. And I know why: Because that would show quite clearly, how that bug is abandoned and will never ever get fixed *ever*. Oh well. What did I expect from “the most buggy scripting language on the planet”(TM)? ------------------------------------------------------------------------ [2011-08-01 13:02:17] evi1m4chine at googlemail dot com Have you even read my comment?? I repeat: “The reason I made a new bug for this, is that the old ones are years old, abandonded, lackinng reproducability and are vague in their description. This one is easy to reproduce with the script, very specific and clearly described. The only bugs can be marked as duplicates of this one.” ------------------------------------------------------------------------ [2011-08-01 00:07:20] pajoye@php.net Please do not submit the same bug more than once. An existing bug report already describes this very problem. Even if you feel that your issue is somewhat different, the resolution is likely to be the same. Thank you for your interest in PHP. We already have a report about this issue. ------------------------------------------------------------------------ [2011-07-31 23:52:11] evi1m4chine at googlemail dot com Description: ------------ When drawing filled arcs with a alpha-transparent color, imagefilledarc creates a transparency gradient that looks like it drew a number of lines on top of each other. The supplied test script and info below is easier to understand, than a textual description can be, GDlib version: 2.0.35 P.S.: The reason I made a new bug for this, is that the old ones are years old, abandonded, lackinng reproducability and are vague in their description. This one is easy to reproduce with the script, very specific and clearly described. The only bugs can be marked as duplicates of this one. Test script: --------------- <?php // Outputs a PNG image with alpha transparency. function imagefilledroundedrectangle(&$im, $x1, $y1, $x2, $y2, $radius, $color) { imagefilledrectangle($im, $x1+$radius, $y1, $x2-$radius, $y1+$radius, $color); imagefilledrectangle($im, $x1, $y1+$radius, $x2, $y2-$radius, $color); imagefilledrectangle($im, $x1+$radius, $y2-$radius, $x2-$radius, $y2, $color); imagefilledarc($im, $x2-$radius, $y2-$radius, $radius*2, $radius*2, 0, 90, $color, IMG_ARC_PIE); imagefilledarc($im, $x1+$radius, $y2-$radius, $radius*2, $radius*2, 90, 180, $color, IMG_ARC_PIE); imagefilledarc($im, $x1+$radius, $y1+$radius, $radius*2, $radius*2, 180, 270, $color, IMG_ARC_PIE); imagefilledarc($im, $x2-$radius, $y1+$radius, $radius*2, $radius*2, 270, 360, $color, IMG_ARC_PIE); } $img = imagecreatetruecolor(200,200); imagefilledroundedrectangle($img, 50, 50, 150, 150, 25, 0x1F7F7F7F); imagepng($img); imagedestroy($img); ?> Expected result: ---------------- A transparent PNG image of 200×200px, containing a rectangle of 100×100px at the center, which has corners rounded to a radius of 25px, a 50% gray color and *uniform* transparency of 25%. Actual result: -------------- A transparent PNG image of 200×200px, containing a rectangle of 100×100px at the center, which has corners rounded to a radius of 25px, a 50% gray color and a transparency *angle gradient* of 0-100%. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=55332&edit=1