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renderer: improve the video quality by using rendering hint

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Gitlab: #390

Change-Id: Idf3ccf9ab5b29a984a36ea117e6cf495a9e80988
This commit is contained in:
Ming Rui Zhang 2021-04-29 11:23:18 -04:00
parent 9a84dcd631
commit b420ca3a20
2 changed files with 12 additions and 2 deletions
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7
src/distantrenderer.cpp
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@ -87,7 +87,12 @@ DistantRenderer::paint(QPainter* painter)
{
lrcInstance_->renderer()->drawFrame(distantRenderId_, [this, painter](QImage* distantImage) {
if (distantImage) {
auto scaledDistant = distantImage->scaled(size().toSize(), Qt::KeepAspectRatio);
painter->setRenderHint(QPainter::Antialiasing);
painter->setRenderHint(QPainter::SmoothPixmapTransform);
auto scaledDistant = distantImage->scaled(size().toSize(),
Qt::KeepAspectRatio,
Qt::SmoothTransformation);
auto tempScaledWidth = static_cast<int>(scaledWidth_ * 1000);
auto tempScaledHeight = static_cast<int>(scaledHeight_ * 1000);
auto tempXOffset = xOffset_;

7
src/previewrenderer.cpp
View file

@ -51,6 +51,9 @@ PreviewRenderer::paint(QPainter* painter)
lrcInstance_->renderer()
->drawFrame(lrc::api::video::PREVIEW_RENDERER_ID, [this, painter](QImage* previewImage) {
if (previewImage) {
painter->setRenderHint(QPainter::Antialiasing);
painter->setRenderHint(QPainter::SmoothPixmapTransform);
auto aspectRatio = static_cast<qreal>(previewImage->width())
/ static_cast<qreal>(previewImage->height());
auto previewHeight = height();
@ -69,7 +72,9 @@ PreviewRenderer::paint(QPainter* painter)
// If the given size is empty, this function returns a null image.
QImage scaledPreview;
scaledPreview = previewImage->scaled(size().toSize(), Qt::KeepAspectRatio);
scaledPreview = previewImage->scaled(size().toSize(),
Qt::KeepAspectRatio,
Qt::SmoothTransformation);
painter->drawImage(QRect(0, 0, scaledPreview.width(), scaledPreview.height()),
scaledPreview);
} else {