252795 2023-02-22 20:59:51 -0800 [WebGL] Avoid using glReadPixels to paint WebGL canvas into 2D canvas 2023-04-03 13:44:57 -0700 1 1 1 Unclassified WebKit WebGL Other Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 djg djg dino fujii kbr kkinnunen webkit-bug-importer oldest_to_newest 1936061 0 djg 2023-02-22 20:59:51 -0800 Current codepath works like: * Send request to read the back buffer to a pixel-buffer * Create native image from pixel-buffer * Draw native image to context 2D We should try to do better especially when GPUP is enabled because this leads to: * WP: Send request to read the back buffer to a pixel buffer * GPUP: glReadPixels to a malloc buffer (WebCore::PixelBuffer) * GPUP: Send the pixel buffer to WP * WP: Creates native image out of that, sends that to GPUP * GPUP: draws that native image to Context2D back-buffer 1936062 1 djg 2023-02-22 21:01:05 -0800 <rdar://87173127> 1936063 2 djg 2023-02-22 21:07:51 -0800 Pull request: https://github.com/WebKit/WebKit/pull/10560 1946244 3 ews-feeder 2023-04-03 11:13:48 -0700 Committed 262518@main (50ae4e81ccce): <https://commits.webkit.org/262518@main> Reviewed commits have been landed. Closing PR #10560 and removing active labels. 1946305 4 fujii 2023-04-03 13:44:57 -0700 Regressed: Bug 254942 – REGRESSION(262518@main) [cairo] Crash under GraphicsContextGL::paintToCanvas