#include "kis_qimage_pyramid.h"
#include <limits>
#include <QPainter>
#include <kis_debug.h>

Macros
#define	MAX_MIPMAP_SCALE 8.0

#define	MIPMAP_SIZE_THRESHOLD 512

#define	QPAINTER_WORKAROUND_BORDER 1

Functions
QTransform	baseBrushTransform (KisDabShape const &shape, qreal subPixelX, qreal subPixelY, const QRectF &baseBounds)

QRect	roundRect (const QRectF &rc)

Macro Definition Documentation

◆ MAX_MIPMAP_SCALE

#define MAX_MIPMAP_SCALE 8.0

Definition at line 14 of file kis_qimage_pyramid.cpp.

◆ MIPMAP_SIZE_THRESHOLD

#define MIPMAP_SIZE_THRESHOLD 512

Definition at line 13 of file kis_qimage_pyramid.cpp.

◆ QPAINTER_WORKAROUND_BORDER

#define QPAINTER_WORKAROUND_BORDER 1

Definition at line 16 of file kis_qimage_pyramid.cpp.

Function Documentation

◆ baseBrushTransform()

QTransform baseBrushTransform	(	KisDabShape const &	shape,
		qreal	subPixelX,
		qreal	subPixelY,
		const QRectF &	baseBounds )

Definition at line 131 of file kis_qimage_pyramid.cpp.

{
    QTransform transform;
    transform.scale(shape.scaleX(), shape.scaleY());
 
    if (!qFuzzyCompare(shape.rotation(), 0) && !qIsNaN(shape.rotation())) {
        transform = transform * QTransform().rotateRadians(shape.rotation());
        QRectF rotatedBounds = transform.mapRect(baseBounds);
        transform = transform * QTransform::fromTranslate(-rotatedBounds.x(), -rotatedBounds.y());
    }
 
    return transform * QTransform::fromTranslate(subPixelX, subPixelY);
}

References qFuzzyCompare(), KisDabShape::rotation(), KisDabShape::scaleX(), and KisDabShape::scaleY().

◆ roundRect()

QRect roundRect ( const QRectF & rc )

inline

This is an analog of toAlignedRect() with the only difference that it ensures the rect position will never be below zero.

Warning: be very careful with using bottom()/right() values of a pure QRect (we don't use it here for the dangers it can lead to).

Definition at line 91 of file kis_qimage_pyramid.cpp.

{
    QRectF rect(rc);
 
    KIS_SAFE_ASSERT_RECOVER_NOOP(rect.x() > -0.000001);
    KIS_SAFE_ASSERT_RECOVER_NOOP(rect.y() > -0.000001);
 
    if (rect.x() < 0.000001) {
        rect.setLeft(0.0);
    }
 
    if (rect.y() < 0.000001) {
        rect.setTop(0.0);
    }
 
    qreal w_rounded = qRound(rect.width());
    qreal h_rounded = qRound(rect.height());
 
    //Take care of the float precision errors
    if (qAbs(rect.width() - w_rounded) < 0.000001) {
        rect.setWidth(w_rounded);
    }
 
    if (qAbs(rect.height() - h_rounded) < 0.000001) {
        rect.setHeight(h_rounded);
    }
 
 
    return rect.toAlignedRect();
}

References KIS_SAFE_ASSERT_RECOVER_NOOP.

Macros