| Summary: | Blank WebGL Canvas when element is shown after hiding (Safari) | ||||||
|---|---|---|---|---|---|---|---|
| Product: | WebKit | Reporter: | Tom <tom.chan> | ||||
| Component: | Canvas | Assignee: | Nobody <webkit-unassigned> | ||||
| Status: | NEW --- | ||||||
| Severity: | Normal | CC: | dino, justin_fan, mmaxfield, webkit-bug-importer | ||||
| Priority: | P2 | Keywords: | InRadar | ||||
| Version: | Safari 13 | ||||||
| Hardware: | All | ||||||
| OS: | All | ||||||
| Attachments: |
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Created attachment 395253 [details] app showing safari webGL canvas drawing bug When you reshow a WebGL canvas element, the contents are not always drawn and you sometimes just get a blank canvas. This issue only seems to be present on Safari. Reproduction steps: 1. Create a canvas element using WebGL to draw. 2. Hide that element using "display: none". 3. Reshow the element using "display: block". Current Behaviour: Repetitive trials indicate that the canvas content is only restored about 50% of the time. Expected Behaviour: The canvas element's content, i.e. what is drawn on the canvas, should be redrawn when the element is re-shown in all instances. Other: See attached zip for a simple app that demonstrates this.