217381 2020-10-06 05:56:55 -0700 REGRESSION: Fails array of uniform sampler2D 2020-10-08 01:13:31 -0700 1 1 1 Unclassified WebKit WebGL Safari 14 Mac macOS 10.15 RESOLVED DUPLICATE 215630 InRadar P2 Normal --- 1 konstantin.plotnikov webkit-unassigned dino kkinnunen webkit-bug-importer oldest_to_newest 1695115 0 410628 konstantin.plotnikov 2020-10-06 05:56:55 -0700 Created attachment 410628 Code to reproduse see lines: 17 to 30 The issue seems to be the regression from Safari 13. What goes wrong: When there is a uniform sampler2d array in the shader safari 14 seems to use the wrong index within an array. The issue can't be reproduced in Safari 13 Steps to reporoduce: In the attachment fragment shader uses a two element uniform sampler2d array. When the texture uses 0 slot and in the fragment shader 0 slot is being read, then it fails. Lines 23 to 25 the same but (sampler2d.length - 1) is read in the shader everything works as expected. If the texture is 1x1 pixels then everything works as expected (lines 28 to 30). FF and Chrome work in the similar way to Safari 13 1695793 1 webkit-bug-importer 2020-10-07 22:04:55 -0700 <rdar://problem/70079753> 1695822 2 kkinnunen 2020-10-08 01:13:31 -0700 Thanks for the report! To clarify: Expected rendering is red-green rectangle when TEX_POSITION == TEX_POSITION_SHADER Actual rendering is black. Working case: TEX_POSITION = 1 TEX_POSITION_SHADER = 1 Not-working case: TEX_POSITION = 0 TEX_POSITION_SHADER = 0 Marking as duplicate of bug 215630. *** This bug has been marked as a duplicate of bug 215630 *** 410628 2020-10-06 05:56:55 -0700 2020-10-06 05:56:55 -0700 Code to reproduse see lines: 17 to 30 safari_bug.html text/html 8742 konstantin.plotnikov PCFkb2N0eXBlIGh0bWw+CjxodG1sIGxhbmc9ImVuIj4KICA8aGVhZD4KICAgIDxtZXRhIGNoYXJz ZXQ9InV0Zi04Ij4KICAgIDx0aXRsZT5XZWJHTCBEZW1vPC90aXRsZT4KICAgIDxzY3JpcHQgc3Jj PSJodHRwczovL2NkbmpzLmNsb3VkZmxhcmUuY29tL2FqYXgvbGlicy9nbC1tYXRyaXgvMi44LjEv Z2wtbWF0cml4LW1pbi5qcyIKICAgICAgaW50ZWdyaXR5PSJzaGE1MTItemhIUVIwL0g1U0VCTDNX bjZ5WVNhVFRaZWoxMnowaFZaS092M1R3Q1VYVDF6NXFlcUdjWEpMTHJiRVJZUlNjRUREcFlJSmhQ QzFmazMxZ3FSNzgzaVE9PSIKICAgICAgY3Jvc3NvcmlnaW49ImFub255bW91cyI+CiAgICA8L3Nj cmlwdD4KICA8L2hlYWQ+CgogIDxib2R5PgogICAgPGNhbnZhcyBpZD0iZ2xjYW52YXMiIHdpZHRo PSI2NDAiIGhlaWdodD0iNDgwIj48L2NhbnZhcz4KICA8L2JvZHk+CiAgPHNjcmlwdD4KICAgICAg 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