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vo: use pixmap to accelerate qpainter on screen drawing

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noticeable performance improvement.
TODO: what about filters (on vo)?
This commit is contained in:
wang-bin
2016-02-05 22:02:37 +08:00
parent fafd3b0427
commit 52a356f72d
1 changed files with 7 additions and 3 deletions
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src/output/video/QPainterRenderer.cpp
+7 -3
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@@ -107,9 +107,12 @@ void QPainterRenderer::drawFrame()
if (orientation() == 0) {
//assume that the image data is already scaled to out_size(NOT renderer size!)
if (roi.size() == d.out_rect.size()) {
d.painter->drawImage(d.out_rect.topLeft(), d.image, roi);
d.painter->drawPixmap(d.out_rect.topLeft(), QPixmap::fromImage(d.image), roi);
//d.painter->drawImage(d.out_rect.topLeft(), d.image, roi);
} else {
d.painter->drawImage(d.out_rect, d.image, roi);
// drawPixmap() is faster for on screen painting
d.painter->drawPixmap(d.out_rect, QPixmap::fromImage(d.image), roi);
//d.painter->drawImage(d.out_rect, d.image, roi);
//what's the difference?
//d.painter->drawImage(QPoint(), image.scaled(d.renderer_width, d.renderer_height));
}
@@ -126,7 +129,8 @@ void QPainterRenderer::drawFrame()
d.painter->scale((qreal)d.out_rect.width()/(qreal)rendererWidth(), (qreal)d.out_rect.height()/(qreal)rendererHeight());
d.painter->rotate(orientation());
d.painter->translate(-rendererWidth()/2, -rendererHeight()/2);
d.painter->drawImage(QRect(0, 0, rendererWidth(), rendererHeight()), d.image, roi);
d.painter->drawPixmap(QRect(0, 0, rendererWidth(), rendererHeight()), QPixmap::fromImage(d.image), roi);
//d.painter->drawImage(QRect(0, 0, rendererWidth(), rendererHeight()), d.image, roi);
d.painter->restore();
}