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wasm: prevent crash on null backingstore pointer 

We can get draw calls in between creating the platform
window and the platform backing store.

Task-number: QTBUG-75463
Change-Id: If0b67d40fac84e466f204ec23a267aa4c6121cbd
Reviewed-by: Lorn Potter <lorn.potter@gmail.com>
Morten Johan Sørvig 2019-04-27 00:27:19 +02:00 committed by Jani Heikkinen
parent 22c3c55de4
commit 6d7c7a5dda
1 changed files with 2 additions and 0 deletions
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2
src/plugins/platforms/wasm/qwasmcompositor.cpp
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@ -251,6 +251,8 @@ void QWasmCompositor::blit(QOpenGLTextureBlitter *blitter, QWasmScreen *screen,
void QWasmCompositor::drawWindowContent(QOpenGLTextureBlitter *blitter, QWasmScreen *screen, QWasmWindow *window)
{
QWasmBackingStore *backingStore = window->backingStore();
if (!backingStore)
return;
QOpenGLTexture const *texture = backingStore->getUpdatedTexture();