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common: allow composition on empty scene without insufficient condition error

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If there was an empty scene (empty scene, so bounds equal zero) with a mask composition applied,
Paint::Impl::render failed on checking size and Canvas::draw() returned InsufficientCondition.
As a result no other paints was rendered.

@issue: fixes #842
This commit is contained in:
Michal Maciola 2021-09-28 13:15:24 +02:00 • committed by Hermet Park
parent 591ea1d61c
commit 81e6471071
1 changed files with 3 additions and 1 deletions
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4
src/lib/tvgCanvasImpl.h
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@ -114,10 +114,12 @@ struct Canvas::Impl
{
if (drawing || paints.count == 0 || !renderer || !renderer->preRender()) return Result::InsufficientCondition;
bool rendered = false;
for (auto paint = paints.data; paint < (paints.data + paints.count); ++paint) {
if (!(*paint)->pImpl->render(*renderer)) return Result::InsufficientCondition;
if ((*paint)->pImpl->render(*renderer)) rendered = true;
}
if (!rendered) return Result::InsufficientCondition;
if (!renderer->postRender()) return Result::InsufficientCondition;
drawing = true;