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djvu: Initialize to white if rendering fails

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It's what ddjvu does, and also it's not nice to return an uninitialzed image back to the user

BUGS: 377202
This commit is contained in:
Albert Astals Cid 2017-03-05 19:51:29 +01:00
parent 7da5adce57
commit 0419812ad7
1 changed files with 4 additions and 0 deletions
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4
generators/djvu/kdjvu.cpp
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@ -494,6 +494,10 @@ QImage KDjVu::Private::generateImageTile( ddjvu_page_t *djvupage, int& res,
ddjvu_page_get_width( djvupage );
res = ddjvu_page_render( djvupage, DDJVU_RENDER_COLOR,
&pagerect, &renderrect, m_format, res_img.bytesPerLine(), (char *)res_img.bits() );
if (!res)
{
res_img.fill(Qt::white);
}
#ifdef KDJVU_DEBUG
qDebug() << "rendering result:" << res;
#endif