API reference

PaintCompat

Public types, functions, and constants declared in this header.

`FluentRasterCachePainter`

Inherits QPainter

Pixmap sizing, device-pixel-ratio handling, and color components. Explicit bitmap caches retain their requested DPR metadata. Compensate only when the painter ignored a sub-unit DPR; newer Qt already has the right matrix.

Constructors

explicit FluentRasterCachePainter(QPaintDevice* target)

All inherited Qt members：QPainter

`Global`

Methods

template <class Device> inline void fluentSetRenderTargetDevicePixelRatio(Device& device, qreal dpr): Qt 5.15/6.2 clamp a paint device's DPR to 1. Qt effect filters also assume at least unit density. Keep explicit render targets at >= 1 and apply the remaining scale in the painter; allocation and dirty tiles stay unchanged.
inline void fluentApplyRenderTargetScale(QPainter& painter, qreal dpr): Applies the remaining scale to a normalized explicit render target.
inline QSize fluentPixmapLogicalSize(const QPixmap& pixmap)
inline void fluentDrawPixmapAt(QPainter& painter, const QPointF& position, const QPixmap& pixmap): Draws a pixmap at its logical size, including DPR below 1.
inline void fluentDrawImageAt(QPainter& painter, const QPointF& position, const QImage& image): Draws an image at its logical size, including DPR below 1.
inline QRectF fluentPixmapSourceRectForDraw(const QRectF& logicalSource, const QPixmap& pixmap)
inline QPixmap fluentIconPixmapForLogicalExtent(const QIcon& icon, const QSize& logicalExtent, qreal devicePixelRatio = 1.0, QWindow* targetWindow = nullptr)
inline qreal fluentPainterDevicePixelRatio(const QPainter& painter): Effective device pixel ratio for the painter's current paint device.
inline void fluentDrawPixmapInLogicalRect(QPainter& painter, const QRectF& logicalRect, const QPixmap& source): Draws a pixmap into a logical rect using the painter device DPR.
inline void fluentDrawPixmapInLogicalRect(QPainter& painter, const QRect& logicalRect, const QPixmap& source)
inline void fluentDrawCoverPixmapInLogicalRect(QPainter& painter, const QRectF& logicalRect, const QPixmap& source): Draws a pixmap with cover-crop scaling into a logical rect.

Types and aliases

using FluentColorComponent = float: QColor::getHsvF / getRgbF / getHslF component pointer type.
using FluentColorComponent = qreal