Browse Source

Merge pull request #4734

anthony.bilinski (1):
      fix(preview): only downscale preview images, never upscale
reviewable/pr4756/r1
sudden6 8 years ago
parent
commit
acfe237e74
No known key found for this signature in database
GPG Key ID: 279509B499E032B9
  1. 14
      src/chatlog/content/filetransferwidget.cpp

14
src/chatlog/content/filetransferwidget.cpp

@ -549,8 +549,18 @@ void FileTransferWidget::showPreview(const QString& filename) @@ -549,8 +549,18 @@ void FileTransferWidget::showPreview(const QString& filename)
ui->previewButton->show();
// Show mouseover preview, but make sure it's not larger than 50% of the screen width/height
const QRect desktopSize = QApplication::desktop()->screenGeometry();
const QImage previewImage = image.scaled(0.5 * desktopSize.width(), 0.5 * desktopSize.height(),
Qt::KeepAspectRatio, Qt::SmoothTransformation);
const int maxPreviewWidth{desktopSize.width() / 2};
const int maxPreviewHeight{desktopSize.height() /2};
const QImage previewImage = [&image, maxPreviewWidth, maxPreviewHeight]() {
if (image.width() > maxPreviewWidth || image.height() > maxPreviewHeight) {
return image.scaled(maxPreviewWidth, maxPreviewHeight,
Qt::KeepAspectRatio, Qt::SmoothTransformation);
}
else {
return image;
}
}();
QByteArray imageData;
QBuffer buffer(&imageData);
buffer.open(QIODevice::WriteOnly);

Loading…
Cancel
Save