215844 2020-08-26 01:42:10 -0700 WebGL goes in a bad state where glContext.createProgram() returns null 2020-09-09 11:13:58 -0700 1 1 1 Unclassified WebKit ANGLE Safari Technology Preview Mac macOS 10.15 RESOLVED FIXED InRadar P2 Normal --- 215973 214640 1 jujjyl jdarpinian dino ews-watchlist graouts jdarpinian kbr kimmo.t.kinnunen kkinnunen kondapallykalyan webkit-bug-importer oldest_to_newest 1682939 0 jujjyl 2020-08-26 01:42:10 -0700 Running STP through emunittest suite, some of the tests fail with an error TypeError: null is not an object (evaluating 'program.name=id') in Emscripten WebGL library function glCreateProgram: function() { var id = GL.getNewId(GL.programs); var program = GLctx.createProgram(); program.name = id; GL.programs[id] = program; return id; }, Here GLctx is WebGLRenderingContext, and the return of GLctx.createProgram() comes out as null, causing the next line after that to fail. The issue can be reproduced on project http://clb.confined.space/emunittest_unity/Tanks_20191004_152744_wasm_release_profiling.zip 1683051 1 webkit-bug-importer 2020-08-26 11:17:56 -0700 <rdar://problem/67817170> 1683198 2 jdarpinian 2020-08-26 16:49:27 -0700 I'll take this one. 1683199 3 jdarpinian 2020-08-26 16:51:48 -0700 The context is lost. Looks like some texture uploads are triggering some GL errors in ANGLE (probably a different bug), and then GraphicsContextGLOpenGL::reshape() is bailing out because it assumes the GL error was caused by something it did. Easy fix, we can call moveErrorsToSyntheticErrorList() at the top of reshape(). Patch forthcoming. 1683203 4 407358 jdarpinian 2020-08-26 16:58:12 -0700 Created attachment 407358 Patch 1683204 5 407358 jdarpinian 2020-08-26 16:59:04 -0700 Comment on attachment 407358 Patch This fixes it. Need to write a test though. 1683229 6 407358 kbr 2020-08-26 17:45:18 -0700 Comment on attachment 407358 Patch The fix looks good! Thanks in advance for writing a WebGL conformance test. r+ 1683834 7 407518 jdarpinian 2020-08-28 17:06:14 -0700 Created attachment 407518 Patch 1683835 8 407518 jdarpinian 2020-08-28 17:07:55 -0700 Comment on attachment 407518 Patch Added a test. 1683889 9 jdarpinian 2020-08-28 23:52:03 -0700 Also I found and fixed the texture upload error issue in bug 215973. Seems like the Unity Tanks demo assumes that S3TC support implies S3TC sRGB support, which is technically wrong but probably should be true these days. 1684183 10 407518 kbr 2020-08-31 11:11:43 -0700 Comment on attachment 407518 Patch Great diagnosis, fix and test James! One slight concern - if WebKit's WebGL conformance suite snapshot is rolled forward again using the LayoutTests/webgl/generate-webgl-tests.py script, your changes to LayoutTests/webgl/2.0.0/resources/webgl_test_files/conformance/canvas/render-after-resize-test.html will be overwritten, since that script simply copies the files into the WebKit repository, ignoring whether any changes were made locally. Now, any future rolls of this test snapshot will likely be small, since it's not under active development. Could you still think a little bit about this and decide whether it's worth preventing accidents in this area? Thanks. 1684186 11 jdarpinian 2020-08-31 11:24:00 -0700 True. Maybe I can just update the test in the 2.0.0 snapshot upstream. 1684190 12 jdarpinian 2020-08-31 11:26:44 -0700 Actually it looks like this test isn't included in the upstream 2.0.0 snapshot, so it won't be overwritten by the script. 1684191 13 ews-feeder 2020-08-31 11:28:38 -0700 Committed r266362: <https://trac.webkit.org/changeset/266362> All reviewed patches have been landed. Closing bug and clearing flags on attachment 407518. 407358 2020-08-26 16:58:12 -0700 2020-08-28 17:06:13 -0700 Patch bug-215844-20200826165812.patch text/plain 1409 jdarpinian U3VidmVyc2lvbiBSZXZpc2lvbjogMjY1NzgzCmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9D aGFuZ2VMb2cgYi9Tb3VyY2UvV2ViQ29yZS9DaGFuZ2VMb2cKaW5kZXggODc4NTMyNDBlY2FhOTlm NzMzZDZjZDE5OWJlZGYyZWQ4NmM1NTZhYS4uZjVhMWRhZDg0MDRkZTZlMThjYTc5Y2M1MGYyNGQw OWI3MTZlZGZiYyAxMDA2NDQKLS0tIGEvU291cmNlL1dlYkNvcmUvQ2hhbmdlTG9nCisrKyBiL1Nv dXJjZS9XZWJDb3JlL0NoYW5nZUxvZwpAQCAtMSwzICsxLDE1IEBACisyMDIwLTA4LTI2ICBKYW1l cyBEYXJwaW5pYW4gIDxqZGFycGluaWFuQGNocm9taXVtLm9yZz4KKworICAgICAgICBXZWJHTCBn b2VzIGluIGEgYmFkIHN0YXRlIHdoZXJlIGdsQ29udGV4dC5jcmVhdGVQcm9ncmFtKCkgcmV0dXJu cyBudWxsCisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0y MTU4NDQKKworICAgICAgICBSZXZpZXdlZCBieSBOT0JPRFkgKE9PUFMhKS4KKworICAgICAgICBO byBuZXcgdGVzdHMgKE9PUFMhKS4KKworICAgICAgICAqIHBsYXRmb3JtL2dyYXBoaWNzL2FuZ2xl 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