! \internal Creates the buffered scaled image (\a mScaledPixmap) to fit the specified \a finalRect. The parameters \a flipHorz and \a flipVert control whether the resulting image shall be flipped horizontally or vertically. (This is used when \a topLeft is further to the bottom/right than \a bottomRight.) This function only creates the scaled pixmap when the buffered pixmap has a d
| 29408 | If scaling is disabled, sets mScaledPixmap to a null QPixmap. |
| 29409 | */ |
| 29410 | void QCPItemPixmap::updateScaledPixmap(QRect finalRect, bool flipHorz, bool flipVert) |
| 29411 | { |
| 29412 | if (mPixmap.isNull()) |
| 29413 | return; |
| 29414 | |
| 29415 | if (mScaled) |
| 29416 | { |
| 29417 | #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED |
| 29418 | double devicePixelRatio = mPixmap.devicePixelRatio(); |
| 29419 | #else |
| 29420 | double devicePixelRatio = 1.0; |
| 29421 | #endif |
| 29422 | if (finalRect.isNull()) |
| 29423 | finalRect = getFinalRect(&flipHorz, &flipVert); |
| 29424 | if (mScaledPixmapInvalidated || finalRect.size() != mScaledPixmap.size()/devicePixelRatio) |
| 29425 | { |
| 29426 | mScaledPixmap = mPixmap.scaled(finalRect.size()*devicePixelRatio, mAspectRatioMode, mTransformationMode); |
| 29427 | if (flipHorz || flipVert) |
| 29428 | mScaledPixmap = QPixmap::fromImage(mScaledPixmap.toImage().mirrored(flipHorz, flipVert)); |
| 29429 | #ifdef QCP_DEVICEPIXELRATIO_SUPPORTED |
| 29430 | mScaledPixmap.setDevicePixelRatio(devicePixelRatio); |
| 29431 | #endif |
| 29432 | } |
| 29433 | } else if (!mScaledPixmap.isNull()) |
| 29434 | mScaledPixmap = QPixmap(); |
| 29435 | mScaledPixmapInvalidated = false; |
| 29436 | } |
| 29437 | |
| 29438 | /*! \internal |
| 29439 |
nothing calls this directly
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