229182 2021-08-17 02:37:25 -0700 compressedTexSubImage2D does not return error when COMPRESSED_RGB_ETC1_WEBGL is used 2021-08-31 03:16:22 -0700 1 1 1 Unclassified WebKit WebGL WebKit Local Build Unspecified Unspecified RESOLVED INVALID https://bugs.webkit.org/show_bug.cgi?id=229180 InRadar P2 Normal --- 1 kkinnunen webkit-unassigned dino kbr kkinnunen webkit-bug-importer oldest_to_newest 1784773 0 kkinnunen 2021-08-17 02:37:25 -0700 compressedTexSubImage2D does return error when COMPRESSED_RGB_ETC1_WEBGL is used Would have been easier to understand the behavior for the developer in bug 229180. 1784775 1 kkinnunen 2021-08-17 02:39:03 -0700 WebGLRenderingContextBase::validateCompressedTexDimensions ... case ExtensionsGL::ETC1_RGB8_OES: // Not supported for ETC1_RGB8_OES textures. return false; 1784880 2 kbr 2021-08-17 11:10:37 -0700 Changed summary: "does" -> "does not". 1786697 3 webkit-bug-importer 2021-08-24 02:38:16 -0700 <rdar://problem/82283649> 1788849 4 kkinnunen 2021-08-31 03:16:22 -0700 In fact, the unreported error in validateCompressedTexSubDimensions is !USE(ANGLE) block. ANGLE does report INVALID_OPERATION and this should have been observable in the original report should I have understood to add a check for it. (Since it's from ANGLE and not a simulated error, it's not printed in the console).