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Performance: Added Utils::copyFromQImage() in cvfqtUtils. Optimized copy

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for QImage::Format_ARGB32, and use this function from the paint event in
cafViewer.
This commit is contained in:
Magne Sjaastad
2013-09-30 13:17:05 +02:00
parent a5a1dfe701
commit 15eab9b261
3 changed files with 82 additions and 22 deletions
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21
Fwk/AppFwk/cafViewer/cafViewer.cpp
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@@ -454,28 +454,13 @@ void caf::Viewer::paintEvent(QPaintEvent* event)
// Convert the QImage into the cvf::TextureImage,
// handling vertical mirroring and (possible) byteswapping
if (((int)m_overlayTextureImage->height()) != this->height() || ((int)m_overlayTextureImage->width() != this->width()))
if (((int)m_overlayTextureImage->height()) != this->height() || ((int)m_overlayTextureImage->width() != this->width()))
{
m_overlayTextureImage->allocate(this->width(), this->height());
}
int height = m_overlayTextureImage->height();
int width = m_overlayTextureImage->width();
#pragma omp parallel for
for (int y = 0 ; y < height; ++y)
{
int negy = height - 1 - y;
for (int x = 0 ; x < width; ++x)
{
// Should probably do direct conversion on byte level. Would be faster
// QImage.bits() and cvf::TextureImage.ptr() (casting away const)
QRgb qtRgbaVal = m_overlayPaintingQImage.pixel(x, negy);
cvf::Color4ub cvfRgbVal(qRed(qtRgbaVal), qGreen(qtRgbaVal), qBlue(qtRgbaVal), qAlpha(qtRgbaVal));
m_overlayTextureImage->setPixel(x, y, cvfRgbVal);
}
}
cvfqt::Utils::copyFromQImage(m_overlayTextureImage.p(), m_overlayPaintingQImage);
m_overlayImage->setImage(m_overlayTextureImage.p());
m_overlayImage->setPixelSize(cvf::Vec2ui(this->width(), this->height()));
}