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Diffstat (limited to 'src/gui/image/qpixmapfilter.cpp')
| -rw-r--r-- | src/gui/image/qpixmapfilter.cpp | 1382 |
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diff --git a/src/gui/image/qpixmapfilter.cpp b/src/gui/image/qpixmapfilter.cpp deleted file mode 100644 index c05afb052e..0000000000 --- a/src/gui/image/qpixmapfilter.cpp +++ /dev/null @@ -1,1382 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). -** All rights reserved. -** Contact: Nokia Corporation (qt-info@nokia.com) -** -** This file is part of the QtGui module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** No Commercial Usage -** This file contains pre-release code and may not be distributed. -** You may use this file in accordance with the terms and conditions -** contained in the Technology Preview License Agreement accompanying -** this package. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 2.1 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 2.1 requirements -** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. -** -** In addition, as a special exception, Nokia gives you certain additional -** rights. These rights are described in the Nokia Qt LGPL Exception -** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. -** -** If you have questions regarding the use of this file, please contact -** Nokia at qt-info@nokia.com. -** -** -** -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include <qglobal.h> - -#include <QDebug> - -#include "qpainter.h" -#include "qpixmap.h" -#include "qpixmapfilter_p.h" -#include "qvarlengtharray.h" - -#include "private/qapplication_p.h" -#include "private/qgraphicssystem_p.h" -#include "private/qpaintengineex_p.h" -#include "private/qpaintengine_raster_p.h" -#include "qmath.h" -#include "private/qmath_p.h" -#include "private/qmemrotate_p.h" -#include "private/qdrawhelper_p.h" - -#ifndef QT_NO_GRAPHICSEFFECT -QT_BEGIN_NAMESPACE - -class QPixmapFilterPrivate : public QObjectPrivate -{ - Q_DECLARE_PUBLIC(QPixmapFilter) -public: - QPixmapFilter::FilterType type; -}; - -/*! - \class QPixmapFilter - \since 4.5 - \ingroup painting - - \brief The QPixmapFilter class provides the basic functionality for - pixmap filter classes. Pixmap filter can be for example colorize or blur. - - QPixmapFilter is the base class for every pixmap filter. QPixmapFilter is - an abstract class and cannot itself be instantiated. It provides a standard - interface for filter processing. - - \internal -*/ - -/*! - \enum QPixmapFilter::FilterType - - \internal - - This enum describes the types of filter that can be applied to pixmaps. - - \value ConvolutionFilter A filter that is used to calculate the convolution - of the image with a kernel. See - QPixmapConvolutionFilter for more information. - \value ColorizeFilter A filter that is used to change the overall color - of an image. See QPixmapColorizeFilter for more - information. - \value DropShadowFilter A filter that is used to add a drop shadow to an - image. See QPixmapDropShadowFilter for more - information. - \value BlurFilter A filter that is used to blur an image using - a simple blur radius. See QPixmapBlurFilter - for more information. - - \value UserFilter The first filter type that can be used for - application-specific purposes. -*/ - - -/*! - Constructs a default QPixmapFilter with the given \a type. - - This constructor should be used when subclassing QPixmapFilter to - create custom user filters. - - \internal -*/ -QPixmapFilter::QPixmapFilter(FilterType type, QObject *parent) - : QObject(*new QPixmapFilterPrivate, parent) -{ - d_func()->type = type; -} - - - -/*! - \internal -*/ -QPixmapFilter::QPixmapFilter(QPixmapFilterPrivate&d, QPixmapFilter::FilterType type, QObject *parent) - : QObject(d, parent) -{ - d_func()->type = type; -} - - -/*! - Destroys the pixmap filter. - - \internal -*/ -QPixmapFilter::~QPixmapFilter() -{ -} - -/*! - Returns the type of the filter. All standard pixmap filter classes - are associated with a unique value. - - \internal -*/ -QPixmapFilter::FilterType QPixmapFilter::type() const -{ - Q_D(const QPixmapFilter); - return d->type; -} - -/*! - Returns the bounding rectangle that is affected by the pixmap - filter if the filter is applied to the specified \a rect. - - \internal -*/ -QRectF QPixmapFilter::boundingRectFor(const QRectF &rect) const -{ - return rect; -} - -/*! - \fn void QPixmapFilter::draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF& srcRect) const - - Uses \a painter to draw filtered result of \a src at the point - specified by \a p. If \a srcRect is specified the it will - be used as a source rectangle to only draw a part of the source. - - draw() will affect the area which boundingRectFor() returns. - - \internal -*/ - -/*! - \class QPixmapConvolutionFilter - \since 4.5 - \ingroup painting - - \brief The QPixmapConvolutionFilter class provides convolution - filtering for pixmaps. - - QPixmapConvolutionFilter implements a convolution pixmap filter, - which is applied when \l{QPixmapFilter::}{draw()} is called. A - convolution filter lets you distort an image by setting the values - of a matrix of qreal values called its - \l{setConvolutionKernel()}{kernel}. The matrix's values are - usually between -1.0 and 1.0. - - \omit - In convolution filtering, the pixel value is calculated from the - neighboring pixels based on the weighting convolution kernel. - This needs explaining to be useful. - \endomit - - Example: - \snippet doc/src/snippets/code/src_gui_image_qpixmapfilter.cpp 1 - - \sa {Pixmap Filters Example}, QPixmapColorizeFilter, QPixmapDropShadowFilter - - - \internal -*/ - -class QPixmapConvolutionFilterPrivate : public QPixmapFilterPrivate -{ -public: - QPixmapConvolutionFilterPrivate(): convolutionKernel(0), kernelWidth(0), kernelHeight(0), convoluteAlpha(false) {} - ~QPixmapConvolutionFilterPrivate() { - delete[] convolutionKernel; - } - - qreal *convolutionKernel; - int kernelWidth; - int kernelHeight; - bool convoluteAlpha; -}; - - -/*! - Constructs a pixmap convolution filter. - - By default there is no convolution kernel. - - \internal -*/ -QPixmapConvolutionFilter::QPixmapConvolutionFilter(QObject *parent) - : QPixmapFilter(*new QPixmapConvolutionFilterPrivate, ConvolutionFilter, parent) -{ - Q_D(QPixmapConvolutionFilter); - d->convoluteAlpha = true; -} - -/*! - Destructor of pixmap convolution filter. - - \internal -*/ -QPixmapConvolutionFilter::~QPixmapConvolutionFilter() -{ -} - -/*! - Sets convolution kernel with the given number of \a rows and \a columns. - Values from \a kernel are copied to internal data structure. - - To preserve the intensity of the pixmap, the sum of all the - values in the convolution kernel should add up to 1.0. A sum - greater than 1.0 produces a lighter result and a sum less than 1.0 - produces a darker and transparent result. - - \internal -*/ -void QPixmapConvolutionFilter::setConvolutionKernel(const qreal *kernel, int rows, int columns) -{ - Q_D(QPixmapConvolutionFilter); - delete [] d->convolutionKernel; - d->convolutionKernel = new qreal[rows * columns]; - memcpy(d->convolutionKernel, kernel, sizeof(qreal) * rows * columns); - d->kernelWidth = columns; - d->kernelHeight = rows; -} - -/*! - Gets the convolution kernel data. - - \internal -*/ -const qreal *QPixmapConvolutionFilter::convolutionKernel() const -{ - Q_D(const QPixmapConvolutionFilter); - return d->convolutionKernel; -} - -/*! - Gets the number of rows in the convolution kernel. - - \internal -*/ -int QPixmapConvolutionFilter::rows() const -{ - Q_D(const QPixmapConvolutionFilter); - return d->kernelHeight; -} - -/*! - Gets the number of columns in the convolution kernel. - - \internal -*/ -int QPixmapConvolutionFilter::columns() const -{ - Q_D(const QPixmapConvolutionFilter); - return d->kernelWidth; -} - - -/*! - \internal -*/ -QRectF QPixmapConvolutionFilter::boundingRectFor(const QRectF &rect) const -{ - Q_D(const QPixmapConvolutionFilter); - return rect.adjusted(-d->kernelWidth / 2, -d->kernelHeight / 2, (d->kernelWidth - 1) / 2, (d->kernelHeight - 1) / 2); -} - -// Convolutes the image -static void convolute( - QImage *destImage, - const QPointF &pos, - const QImage &srcImage, - const QRectF &srcRect, - QPainter::CompositionMode mode, - qreal *kernel, - int kernelWidth, - int kernelHeight ) -{ - const QImage processImage = (srcImage.format() != QImage::Format_ARGB32_Premultiplied ) ? srcImage.convertToFormat(QImage::Format_ARGB32_Premultiplied) : srcImage; - // TODO: support also other formats directly without copying - - int *fixedKernel = new int[kernelWidth*kernelHeight]; - for(int i = 0; i < kernelWidth*kernelHeight; i++) - { - fixedKernel[i] = (int)(65536 * kernel[i]); - } - QRectF trect = srcRect.isNull() ? processImage.rect() : srcRect; - trect.moveTo(pos); - QRectF bounded = trect.adjusted(-kernelWidth / 2, -kernelHeight / 2, (kernelWidth - 1) / 2, (kernelHeight - 1) / 2); - QRect rect = bounded.toAlignedRect(); - QRect targetRect = rect.intersected(destImage->rect()); - - QRectF srect = srcRect.isNull() ? processImage.rect() : srcRect; - QRectF sbounded = srect.adjusted(-kernelWidth / 2, -kernelHeight / 2, (kernelWidth - 1) / 2, (kernelHeight - 1) / 2); - QPoint srcStartPoint = sbounded.toAlignedRect().topLeft()+(targetRect.topLeft()-rect.topLeft()); - - const uint *sourceStart = (uint*)processImage.scanLine(0); - uint *outputStart = (uint*)destImage->scanLine(0); - - int yk = srcStartPoint.y(); - for (int y = targetRect.top(); y <= targetRect.bottom(); y++) { - uint* output = outputStart + (destImage->bytesPerLine()/sizeof(uint))*y+targetRect.left(); - int xk = srcStartPoint.x(); - for(int x = targetRect.left(); x <= targetRect.right(); x++) { - int r = 0; - int g = 0; - int b = 0; - int a = 0; - - // some out of bounds pre-checking to avoid inner-loop ifs - int kernely = -kernelHeight/2; - int starty = 0; - int endy = kernelHeight; - if(yk+kernely+endy >= srcImage.height()) - endy = kernelHeight-((yk+kernely+endy)-srcImage.height())-1; - if(yk+kernely < 0) - starty = -(yk+kernely); - - int kernelx = -kernelWidth/2; - int startx = 0; - int endx = kernelWidth; - if(xk+kernelx+endx >= srcImage.width()) - endx = kernelWidth-((xk+kernelx+endx)-srcImage.width())-1; - if(xk+kernelx < 0) - startx = -(xk+kernelx); - - for (int ys = starty; ys < endy; ys ++) { - const uint *pix = sourceStart + (processImage.bytesPerLine()/sizeof(uint))*(yk+kernely+ys) + ((xk+kernelx+startx)); - const uint *endPix = pix+endx-startx; - int kernelPos = ys*kernelWidth+startx; - while (pix < endPix) { - int factor = fixedKernel[kernelPos++]; - a += (((*pix) & 0xff000000)>>24) * factor; - r += (((*pix) & 0x00ff0000)>>16) * factor; - g += (((*pix) & 0x0000ff00)>>8 ) * factor; - b += (((*pix) & 0x000000ff) ) * factor; - pix++; - } - } - - r = qBound((int)0, r >> 16, (int)255); - g = qBound((int)0, g >> 16, (int)255); - b = qBound((int)0, b >> 16, (int)255); - a = qBound((int)0, a >> 16, (int)255); - // composition mode checking could be moved outside of loop - if(mode == QPainter::CompositionMode_Source) { - uint color = (a<<24)+(r<<16)+(g<<8)+b; - *output++ = color; - } else { - uint current = *output; - uchar ca = (current&0xff000000)>>24; - uchar cr = (current&0x00ff0000)>>16; - uchar cg = (current&0x0000ff00)>>8; - uchar cb = (current&0x000000ff); - uint color = - (((ca*(255-a) >> 8)+a) << 24)+ - (((cr*(255-a) >> 8)+r) << 16)+ - (((cg*(255-a) >> 8)+g) << 8)+ - (((cb*(255-a) >> 8)+b)); - *output++ = color;; - } - xk++; - } - yk++; - } - delete[] fixedKernel; -} - -/*! - \internal -*/ -void QPixmapConvolutionFilter::draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF& srcRect) const -{ - Q_D(const QPixmapConvolutionFilter); - if (!painter->isActive()) - return; - - if(d->kernelWidth<=0 || d->kernelHeight <= 0) - return; - - if (src.isNull()) - return; - - QPixmapFilter *filter = painter->paintEngine() && painter->paintEngine()->isExtended() ? - static_cast<QPaintEngineEx *>(painter->paintEngine())->pixmapFilter(type(), this) : 0; - QPixmapConvolutionFilter *convolutionFilter = static_cast<QPixmapConvolutionFilter*>(filter); - if (convolutionFilter) { - convolutionFilter->setConvolutionKernel(d->convolutionKernel, d->kernelWidth, d->kernelHeight); - convolutionFilter->d_func()->convoluteAlpha = d->convoluteAlpha; - convolutionFilter->draw(painter, p, src, srcRect); - return; - } - - // falling back to raster implementation - - QImage *target = 0; - if (painter->paintEngine()->paintDevice()->devType() == QInternal::Image) { - target = static_cast<QImage *>(painter->paintEngine()->paintDevice()); - - QTransform mat = painter->combinedTransform(); - - if (mat.type() > QTransform::TxTranslate) { - // Disabled because of transformation... - target = 0; - } else { - QRasterPaintEngine *pe = static_cast<QRasterPaintEngine *>(painter->paintEngine()); - if (pe->clipType() == QRasterPaintEngine::ComplexClip) - // disabled because of complex clipping... - target = 0; - else { - QRectF clip = pe->clipBoundingRect(); - QRectF rect = boundingRectFor(srcRect.isEmpty() ? src.rect() : srcRect); - QTransform x = painter->deviceTransform(); - if (!clip.contains(rect.translated(x.dx() + p.x(), x.dy() + p.y()))) { - target = 0; - } - - } - } - } - - if (target) { - QTransform x = painter->deviceTransform(); - QPointF offset(x.dx(), x.dy()); - - convolute(target, p+offset, src.toImage(), srcRect, QPainter::CompositionMode_SourceOver, d->convolutionKernel, d->kernelWidth, d->kernelHeight); - } else { - QRect srect = srcRect.isNull() ? src.rect() : srcRect.toRect(); - QRect rect = boundingRectFor(srect).toRect(); - QImage result = QImage(rect.size(), QImage::Format_ARGB32_Premultiplied); - QPoint offset = srect.topLeft() - rect.topLeft(); - convolute(&result, - offset, - src.toImage(), - srect, - QPainter::CompositionMode_Source, - d->convolutionKernel, - d->kernelWidth, - d->kernelHeight); - painter->drawImage(p - offset, result); - } -} - -/*! - \class QPixmapBlurFilter - \since 4.6 - \ingroup multimedia - - \brief The QPixmapBlurFilter class provides blur filtering - for pixmaps. - - QPixmapBlurFilter implements a blur pixmap filter, - which is applied when \l{QPixmapFilter::}{draw()} is called. - - The filter lets you specialize the radius of the blur as well - as hints as to whether to prefer performance or quality. - - By default, the blur effect is produced by applying an exponential - filter generated from the specified blurRadius(). Paint engines - may override this with a custom blur that is faster on the - underlying hardware. - - \sa {Pixmap Filters Example}, QPixmapConvolutionFilter, QPixmapDropShadowFilter - - \internal -*/ - -class QPixmapBlurFilterPrivate : public QPixmapFilterPrivate -{ -public: - QPixmapBlurFilterPrivate() : radius(5), hints(QGraphicsBlurEffect::PerformanceHint) {} - - qreal radius; - QGraphicsBlurEffect::BlurHints hints; -}; - - -/*! - Constructs a pixmap blur filter. - - \internal -*/ -QPixmapBlurFilter::QPixmapBlurFilter(QObject *parent) - : QPixmapFilter(*new QPixmapBlurFilterPrivate, BlurFilter, parent) -{ -} - -/*! - Destructor of pixmap blur filter. - - \internal -*/ -QPixmapBlurFilter::~QPixmapBlurFilter() -{ -} - -/*! - Sets the radius of the blur filter. Higher radius produces increased blurriness. - - \internal -*/ -void QPixmapBlurFilter::setRadius(qreal radius) -{ - Q_D(QPixmapBlurFilter); - d->radius = radius; -} - -/*! - Gets the radius of the blur filter. - - \internal -*/ -qreal QPixmapBlurFilter::radius() const -{ - Q_D(const QPixmapBlurFilter); - return d->radius; -} - -/*! - Setting the blur hints to PerformanceHint causes the implementation - to trade off visual quality to blur the image faster. Setting the - blur hints to QualityHint causes the implementation to improve - visual quality at the expense of speed. - - AnimationHint causes the implementation to optimize for animating - the blur radius, possibly by caching blurred versions of the source - pixmap. - - The implementation is free to ignore this value if it only has a single - blur algorithm. - - \internal -*/ -void QPixmapBlurFilter::setBlurHints(QGraphicsBlurEffect::BlurHints hints) -{ - Q_D(QPixmapBlurFilter); - d->hints = hints; -} - -/*! - Gets the blur hints of the blur filter. - - \internal -*/ -QGraphicsBlurEffect::BlurHints QPixmapBlurFilter::blurHints() const -{ - Q_D(const QPixmapBlurFilter); - return d->hints; -} - -const qreal radiusScale = qreal(2.5); - -/*! - \internal -*/ -QRectF QPixmapBlurFilter::boundingRectFor(const QRectF &rect) const -{ - Q_D(const QPixmapBlurFilter); - const qreal delta = radiusScale * d->radius + 1; - return rect.adjusted(-delta, -delta, delta, delta); -} - -template <int shift> -inline int qt_static_shift(int value) -{ - if (shift == 0) - return value; - else if (shift > 0) - return value << (uint(shift) & 0x1f); - else - return value >> (uint(-shift) & 0x1f); -} - -template<int aprec, int zprec> -inline void qt_blurinner(uchar *bptr, int &zR, int &zG, int &zB, int &zA, int alpha) -{ - QRgb *pixel = (QRgb *)bptr; - -#define Z_MASK (0xff << zprec) - const int A_zprec = qt_static_shift<zprec - 24>(*pixel) & Z_MASK; - const int R_zprec = qt_static_shift<zprec - 16>(*pixel) & Z_MASK; - const int G_zprec = qt_static_shift<zprec - 8>(*pixel) & Z_MASK; - const int B_zprec = qt_static_shift<zprec>(*pixel) & Z_MASK; -#undef Z_MASK - - const int zR_zprec = zR >> aprec; - const int zG_zprec = zG >> aprec; - const int zB_zprec = zB >> aprec; - const int zA_zprec = zA >> aprec; - - zR += alpha * (R_zprec - zR_zprec); - zG += alpha * (G_zprec - zG_zprec); - zB += alpha * (B_zprec - zB_zprec); - zA += alpha * (A_zprec - zA_zprec); - -#define ZA_MASK (0xff << (zprec + aprec)) - *pixel = - qt_static_shift<24 - zprec - aprec>(zA & ZA_MASK) - | qt_static_shift<16 - zprec - aprec>(zR & ZA_MASK) - | qt_static_shift<8 - zprec - aprec>(zG & ZA_MASK) - | qt_static_shift<-zprec - aprec>(zB & ZA_MASK); -#undef ZA_MASK -} - -const int alphaIndex = (QSysInfo::ByteOrder == QSysInfo::BigEndian ? 0 : 3); - -template<int aprec, int zprec> -inline void qt_blurinner_alphaOnly(uchar *bptr, int &z, int alpha) -{ - const int A_zprec = int(*(bptr)) << zprec; - const int z_zprec = z >> aprec; - z += alpha * (A_zprec - z_zprec); - *(bptr) = z >> (zprec + aprec); -} - -template<int aprec, int zprec, bool alphaOnly> -inline void qt_blurrow(QImage & im, int line, int alpha) -{ - uchar *bptr = im.scanLine(line); - - int zR = 0, zG = 0, zB = 0, zA = 0; - - if (alphaOnly && im.format() != QImage::Format_Indexed8) - bptr += alphaIndex; - - const int stride = im.depth() >> 3; - const int im_width = im.width(); - for (int index = 0; index < im_width; ++index) { - if (alphaOnly) - qt_blurinner_alphaOnly<aprec, zprec>(bptr, zA, alpha); - else - qt_blurinner<aprec, zprec>(bptr, zR, zG, zB, zA, alpha); - bptr += stride; - } - - bptr -= stride; - - for (int index = im_width - 2; index >= 0; --index) { - bptr -= stride; - if (alphaOnly) - qt_blurinner_alphaOnly<aprec, zprec>(bptr, zA, alpha); - else - qt_blurinner<aprec, zprec>(bptr, zR, zG, zB, zA, alpha); - } -} - -/* -* expblur(QImage &img, int radius) -* -* Based on exponential blur algorithm by Jani Huhtanen -* -* In-place blur of image 'img' with kernel -* of approximate radius 'radius'. -* -* Blurs with two sided exponential impulse -* response. -* -* aprec = precision of alpha parameter -* in fixed-point format 0.aprec -* -* zprec = precision of state parameters -* zR,zG,zB and zA in fp format 8.zprec -*/ -template <int aprec, int zprec, bool alphaOnly> -void expblur(QImage &img, qreal radius, bool improvedQuality = false, int transposed = 0) -{ - // halve the radius if we're using two passes - if (improvedQuality) - radius *= qreal(0.5); - - Q_ASSERT(img.format() == QImage::Format_ARGB32_Premultiplied - || img.format() == QImage::Format_RGB32 - || img.format() == QImage::Format_Indexed8); - - // choose the alpha such that pixels at radius distance from a fully - // saturated pixel will have an alpha component of no greater than - // the cutOffIntensity - const qreal cutOffIntensity = 2; - int alpha = radius <= qreal(1e-5) - ? ((1 << aprec)-1) - : qRound((1<<aprec)*(1 - qPow(cutOffIntensity * (1 / qreal(255)), 1 / radius))); - - int img_height = img.height(); - for (int row = 0; row < img_height; ++row) { - for (int i = 0; i <= int(improvedQuality); ++i) - qt_blurrow<aprec, zprec, alphaOnly>(img, row, alpha); - } - - QImage temp(img.height(), img.width(), img.format()); - if (transposed >= 0) { - if (img.depth() == 8) { - qt_memrotate270(reinterpret_cast<const quint8*>(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast<quint8*>(temp.bits()), - temp.bytesPerLine()); - } else { - qt_memrotate270(reinterpret_cast<const quint32*>(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast<quint32*>(temp.bits()), - temp.bytesPerLine()); - } - } else { - if (img.depth() == 8) { - qt_memrotate90(reinterpret_cast<const quint8*>(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast<quint8*>(temp.bits()), - temp.bytesPerLine()); - } else { - qt_memrotate90(reinterpret_cast<const quint32*>(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast<quint32*>(temp.bits()), - temp.bytesPerLine()); - } - } - - img_height = temp.height(); - for (int row = 0; row < img_height; ++row) { - for (int i = 0; i <= int(improvedQuality); ++i) - qt_blurrow<aprec, zprec, alphaOnly>(temp, row, alpha); - } - - if (transposed == 0) { - if (img.depth() == 8) { - qt_memrotate90(reinterpret_cast<const quint8*>(temp.bits()), - temp.width(), temp.height(), temp.bytesPerLine(), - reinterpret_cast<quint8*>(img.bits()), - img.bytesPerLine()); - } else { - qt_memrotate90(reinterpret_cast<const quint32*>(temp.bits()), - temp.width(), temp.height(), temp.bytesPerLine(), - reinterpret_cast<quint32*>(img.bits()), - img.bytesPerLine()); - } - } else { - img = temp; - } -} -#define AVG(a,b) ( ((((a)^(b)) & 0xfefefefeUL) >> 1) + ((a)&(b)) ) -#define AVG16(a,b) ( ((((a)^(b)) & 0xf7deUL) >> 1) + ((a)&(b)) ) - -Q_GUI_EXPORT QImage qt_halfScaled(const QImage &source) -{ - if (source.width() < 2 || source.height() < 2) - return QImage(); - - QImage srcImage = source; - - if (source.format() == QImage::Format_Indexed8) { - // assumes grayscale - QImage dest(source.width() / 2, source.height() / 2, srcImage.format()); - - const uchar *src = reinterpret_cast<const uchar*>(const_cast<const QImage &>(srcImage).bits()); - int sx = srcImage.bytesPerLine(); - int sx2 = sx << 1; - - uchar *dst = reinterpret_cast<uchar*>(dest.bits()); - int dx = dest.bytesPerLine(); - int ww = dest.width(); - int hh = dest.height(); - - for (int y = hh; y; --y, dst += dx, src += sx2) { - const uchar *p1 = src; - const uchar *p2 = src + sx; - uchar *q = dst; - for (int x = ww; x; --x, ++q, p1 += 2, p2 += 2) - *q = ((int(p1[0]) + int(p1[1]) + int(p2[0]) + int(p2[1])) + 2) >> 2; - } - - return dest; - } else if (source.format() == QImage::Format_ARGB8565_Premultiplied) { - QImage dest(source.width() / 2, source.height() / 2, srcImage.format()); - - const uchar *src = reinterpret_cast<const uchar*>(const_cast<const QImage &>(srcImage).bits()); - int sx = srcImage.bytesPerLine(); - int sx2 = sx << 1; - - uchar *dst = reinterpret_cast<uchar*>(dest.bits()); - int dx = dest.bytesPerLine(); - int ww = dest.width(); - int hh = dest.height(); - - for (int y = hh; y; --y, dst += dx, src += sx2) { - const uchar *p1 = src; - const uchar *p2 = src + sx; - uchar *q = dst; - for (int x = ww; x; --x, q += 3, p1 += 6, p2 += 6) { - // alpha - q[0] = AVG(AVG(p1[0], p1[3]), AVG(p2[0], p2[3])); - // rgb - const quint16 p16_1 = (p1[2] << 8) | p1[1]; - const quint16 p16_2 = (p1[5] << 8) | p1[4]; - const quint16 p16_3 = (p2[2] << 8) | p2[1]; - const quint16 p16_4 = (p2[5] << 8) | p2[4]; - const quint16 result = AVG16(AVG16(p16_1, p16_2), AVG16(p16_3, p16_4)); - q[1] = result & 0xff; - q[2] = result >> 8; - } - } - - return dest; - } else if (source.format() != QImage::Format_ARGB32_Premultiplied - && source.format() != QImage::Format_RGB32) - { - srcImage = source.convertToFormat(QImage::Format_ARGB32_Premultiplied); - } - - QImage dest(source.width() / 2, source.height() / 2, srcImage.format()); - - const quint32 *src = reinterpret_cast<const quint32*>(const_cast<const QImage &>(srcImage).bits()); - int sx = srcImage.bytesPerLine() >> 2; - int sx2 = sx << 1; - - quint32 *dst = reinterpret_cast<quint32*>(dest.bits()); - int dx = dest.bytesPerLine() >> 2; - int ww = dest.width(); - int hh = dest.height(); - - for (int y = hh; y; --y, dst += dx, src += sx2) { - const quint32 *p1 = src; - const quint32 *p2 = src + sx; - quint32 *q = dst; - for (int x = ww; x; --x, q++, p1 += 2, p2 += 2) - *q = AVG(AVG(p1[0], p1[1]), AVG(p2[0], p2[1])); - } - - return dest; -} - -Q_GUI_EXPORT void qt_blurImage(QPainter *p, QImage &blurImage, qreal radius, bool quality, bool alphaOnly, int transposed = 0) -{ - if (blurImage.format() != QImage::Format_ARGB32_Premultiplied - && blurImage.format() != QImage::Format_RGB32) - { - blurImage = blurImage.convertToFormat(QImage::Format_ARGB32_Premultiplied); - } - - qreal scale = 1; - if (radius >= 4 && blurImage.width() >= 2 && blurImage.height() >= 2) { - blurImage = qt_halfScaled(blurImage); - scale = 2; - radius *= qreal(0.5); - } - - if (alphaOnly) - expblur<12, 10, true>(blurImage, radius, quality, transposed); - else - expblur<12, 10, false>(blurImage, radius, quality, transposed); - - if (p) { - p->scale(scale, scale); - p->setRenderHint(QPainter::SmoothPixmapTransform); - p->drawImage(QRect(0, 0, blurImage.width(), blurImage.height()), blurImage); - } -} - -Q_GUI_EXPORT void qt_blurImage(QImage &blurImage, qreal radius, bool quality, int transposed = 0) -{ - if (blurImage.format() == QImage::Format_Indexed8) - expblur<12, 10, true>(blurImage, radius, quality, transposed); - else - expblur<12, 10, false>(blurImage, radius, quality, transposed); -} - -Q_GUI_EXPORT bool qt_scaleForTransform(const QTransform &transform, qreal *scale); - -/*! - \internal -*/ -void QPixmapBlurFilter::draw(QPainter *painter, const QPointF &p, const QPixmap &src, const QRectF &rect) const -{ - Q_D(const QPixmapBlurFilter); - if (!painter->isActive()) - return; - - if (src.isNull()) - return; - - QRectF srcRect = rect; - if (srcRect.isNull()) - srcRect = src.rect(); - - if (d->radius <= 1) { - painter->drawPixmap(srcRect.translated(p), src, srcRect); - return; - } - - qreal scaledRadius = radiusScale * d->radius; - qreal scale; - if (qt_scaleForTransform(painter->transform(), &scale)) - scaledRadius /= scale; - - QPixmapFilter *filter = painter->paintEngine() && painter->paintEngine()->isExtended() ? - static_cast<QPaintEngineEx *>(painter->paintEngine())->pixmapFilter(type(), this) : 0; - QPixmapBlurFilter *blurFilter = static_cast<QPixmapBlurFilter*>(filter); - if (blurFilter) { - blurFilter->setRadius(scaledRadius); - blurFilter->setBlurHints(d->hints); - blurFilter->draw(painter, p, src, srcRect); - return; - } - - QImage srcImage; - QImage destImage; - - if (srcRect == src.rect()) { - srcImage = src.toImage(); - } else { - QRect rect = srcRect.toAlignedRect().intersected(src.rect()); - srcImage = src.copy(rect).toImage(); - } - - QTransform transform = painter->worldTransform(); - painter->translate(p); - qt_blurImage(painter, srcImage, scaledRadius, (d->hints & QGraphicsBlurEffect::QualityHint), false); - painter->setWorldTransform(transform); -} - -// grayscales the image to dest (could be same). If rect isn't defined -// destination image size is used to determine the dimension of grayscaling -// process. -static void grayscale(const QImage &image, QImage &dest, const QRect& rect = QRect()) -{ - QRect destRect = rect; - QRect srcRect = rect; - if (rect.isNull()) { - srcRect = dest.rect(); - destRect = dest.rect(); - } - if (&image != &dest) { - destRect.moveTo(QPoint(0, 0)); - } - - unsigned int *data = (unsigned int *)image.bits(); - unsigned int *outData = (unsigned int *)dest.bits(); - - if (dest.size() == image.size() && image.rect() == srcRect) { - // a bit faster loop for grayscaling everything - int pixels = dest.width() * dest.height(); - for (int i = 0; i < pixels; ++i) { - int val = qGray(data[i]); - outData[i] = qRgba(val, val, val, qAlpha(data[i])); - } - } else { - int yd = destRect.top(); - for (int y = srcRect.top(); y <= srcRect.bottom() && y < image.height(); y++) { - data = (unsigned int*)image.scanLine(y); - outData = (unsigned int*)dest.scanLine(yd++); - int xd = destRect.left(); - for (int x = srcRect.left(); x <= srcRect.right() && x < image.width(); x++) { - int val = qGray(data[x]); - outData[xd++] = qRgba(val, val, val, qAlpha(data[x])); - } - } - } -} - -/*! - \class QPixmapColorizeFilter - \since 4.5 - \ingroup painting - - \brief The QPixmapColorizeFilter class provides colorizing - filtering for pixmaps. - - A colorize filter gives the pixmap a tint of its color(). The - filter first grayscales the pixmap and then converts those to - colorized values using QPainter::CompositionMode_Screen with the - chosen color. The alpha-channel is not changed. - - Example: - \snippet doc/src/snippets/code/src_gui_image_qpixmapfilter.cpp 0 - - \sa QPainter::CompositionMode - - \internal -*/ -class QPixmapColorizeFilterPrivate : public QPixmapFilterPrivate -{ - Q_DECLARE_PUBLIC(QPixmapColorizeFilter) -public: - QColor color; - qreal strength; - quint32 opaque : 1; - quint32 alphaBlend : 1; - quint32 padding : 30; -}; - -/*! - Constructs an pixmap colorize filter. - - Default color value for colorizing is QColor(0, 0, 192). - - \internal -*/ -QPixmapColorizeFilter::QPixmapColorizeFilter(QObject *parent) - : QPixmapFilter(*new QPixmapColorizeFilterPrivate, ColorizeFilter, parent) -{ - Q_D(QPixmapColorizeFilter); - d->color = QColor(0, 0, 192); - d->strength = qreal(1); - d->opaque = true; - d->alphaBlend = false; -} - -/*! - Gets the color of the colorize filter. - - \internal -*/ -QColor QPixmapColorizeFilter::color() const -{ - Q_D(const QPixmapColorizeFilter); - return d->color; -} - -/*! - Sets the color of the colorize filter to the \a color specified. - - \internal -*/ -void QPixmapColorizeFilter::setColor(const QColor &color) -{ - Q_D(QPixmapColorizeFilter); - d->color = color; -} - -/*! - Gets the strength of the colorize filter, 1.0 means full colorized while - 0.0 equals to no filtering at all. - - \internal -*/ -qreal QPixmapColorizeFilter::strength() const -{ - Q_D(const QPixmapColorizeFilter); - return d->strength; -} - -/*! - Sets the strength of the colorize filter to \a strength. - - \internal -*/ -void QPixmapColorizeFilter::setStrength(qreal strength) -{ - Q_D(QPixmapColorizeFilter); - d->strength = qBound(qreal(0), strength, qreal(1)); - d->opaque = !qFuzzyIsNull(d->strength); - d->alphaBlend = !qFuzzyIsNull(d->strength - 1); -} - -/*! - \internal -*/ -void QPixmapColorizeFilter::draw(QPainter *painter, const QPointF &dest, const QPixmap &src, const QRectF &srcRect) const -{ - Q_D(const QPixmapColorizeFilter); - - if (src.isNull()) - return; - - QPixmapFilter *filter = painter->paintEngine() && painter->paintEngine()->isExtended() ? - static_cast<QPaintEngineEx *>(painter->paintEngine())->pixmapFilter(type(), this) : 0; - QPixmapColorizeFilter *colorizeFilter = static_cast<QPixmapColorizeFilter*>(filter); - if (colorizeFilter) { - colorizeFilter->setColor(d->color); - colorizeFilter->setStrength(d->strength); - colorizeFilter->draw(painter, dest, src, srcRect); - return; - } - - // falling back to raster implementation - - if (!d->opaque) { - painter->drawPixmap(dest, src, srcRect); - return; - } - - QImage srcImage; - QImage destImage; - - if (srcRect.isNull()) { - srcImage = src.toImage(); - srcImage = srcImage.convertToFormat(srcImage.hasAlphaChannel() ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32); - destImage = QImage(srcImage.size(), srcImage.format()); - } else { - QRect rect = srcRect.toAlignedRect().intersected(src.rect()); - - srcImage = src.copy(rect).toImage(); - srcImage = srcImage.convertToFormat(srcImage.hasAlphaChannel() ? QImage::Format_ARGB32_Premultiplied : QImage::Format_RGB32); - destImage = QImage(rect.size(), srcImage.format()); - } - - // do colorizing - QPainter destPainter(&destImage); - grayscale(srcImage, destImage, srcImage.rect()); - destPainter.setCompositionMode(QPainter::CompositionMode_Screen); - destPainter.fillRect(srcImage.rect(), d->color); - destPainter.end(); - - if (d->alphaBlend) { - // alpha blending srcImage and destImage - QImage buffer = srcImage; - QPainter bufPainter(&buffer); - bufPainter.setOpacity(d->strength); - bufPainter.drawImage(0, 0, destImage); - bufPainter.end(); - destImage = buffer; - } - - if (srcImage.hasAlphaChannel()) - destImage.setAlphaChannel(srcImage.alphaChannel()); - - painter->drawImage(dest, destImage); -} - -class QPixmapDropShadowFilterPrivate : public QPixmapFilterPrivate -{ -public: - QPixmapDropShadowFilterPrivate() - : offset(8, 8), color(63, 63, 63, 180), radius(1) {} - - QPointF offset; - QColor color; - qreal radius; -}; - -/*! - \class QPixmapDropShadowFilter - \since 4.5 - \ingroup painting - - \brief The QPixmapDropShadowFilter class is a convenience class - for drawing pixmaps with drop shadows. - - The drop shadow is produced by taking a copy of the source pixmap - and applying a color to the copy using a - QPainter::CompositionMode_DestinationIn operation. This produces a - homogeneously-colored pixmap which is then drawn using a - QPixmapConvolutionFilter at an offset. The original pixmap is - drawn on top. - - The QPixmapDropShadowFilter class provides some customization - options to specify how the drop shadow should appear. The color of - the drop shadow can be modified using the setColor() function, the - drop shadow offset can be modified using the setOffset() function, - and the blur radius of the drop shadow can be changed through the - setBlurRadius() function. - - By default, the drop shadow is a dark gray shadow, blurred with a - radius of 1 at an offset of 8 pixels towards the lower right. - - Example: - \snippet doc/src/snippets/code/src_gui_image_qpixmapfilter.cpp 2 - - \sa QPixmapColorizeFilter, QPixmapConvolutionFilter - - \internal - */ - -/*! - Constructs drop shadow filter. - - \internal -*/ -QPixmapDropShadowFilter::QPixmapDropShadowFilter(QObject *parent) - : QPixmapFilter(*new QPixmapDropShadowFilterPrivate, DropShadowFilter, parent) -{ -} - -/*! - Destroys drop shadow filter. - - \internal -*/ -QPixmapDropShadowFilter::~QPixmapDropShadowFilter() -{ -} - -/*! - Returns the radius in pixels of the blur on the drop shadow. - - A smaller radius results in a sharper shadow. - - \sa color(), offset() - - \internal -*/ -qreal QPixmapDropShadowFilter::blurRadius() const -{ - Q_D(const QPixmapDropShadowFilter); - return d->radius; -} - -/*! - Sets the radius in pixels of the blur on the drop shadow to the \a radius specified. - - Using a smaller radius results in a sharper shadow. - - \sa setColor(), setOffset() - - \internal -*/ -void QPixmapDropShadowFilter::setBlurRadius(qreal radius) -{ - Q_D(QPixmapDropShadowFilter); - d->radius = radius; -} - -/*! - Returns the color of the drop shadow. - - \sa blurRadius(), offset() - - \internal -*/ -QColor QPixmapDropShadowFilter::color() const -{ - Q_D(const QPixmapDropShadowFilter); - return d->color; -} - -/*! - Sets the color of the drop shadow to the \a color specified. - - \sa setBlurRadius(), setOffset() - - \internal -*/ -void QPixmapDropShadowFilter::setColor(const QColor &color) -{ - Q_D(QPixmapDropShadowFilter); - d->color = color; -} - -/*! - Returns the shadow offset in pixels. - - \sa blurRadius(), color() - - \internal -*/ -QPointF QPixmapDropShadowFilter::offset() const -{ - Q_D(const QPixmapDropShadowFilter); - return d->offset; -} - -/*! - Sets the shadow offset in pixels to the \a offset specified. - - \sa setBlurRadius(), setColor() - - \internal -*/ -void QPixmapDropShadowFilter::setOffset(const QPointF &offset) -{ - Q_D(QPixmapDropShadowFilter); - d->offset = offset; -} - -/*! - \fn void QPixmapDropShadowFilter::setOffset(qreal dx, qreal dy) - \overload - - Sets the shadow offset in pixels to be the displacement specified by the - horizontal \a dx and vertical \a dy coordinates. - - \sa setBlurRadius(), setColor() - - \internal -*/ - -/*! - \internal - */ -QRectF QPixmapDropShadowFilter::boundingRectFor(const QRectF &rect) const -{ - Q_D(const QPixmapDropShadowFilter); - return rect.united(rect.translated(d->offset).adjusted(-d->radius, -d->radius, d->radius, d->radius)); -} - -/*! - \internal - */ -void QPixmapDropShadowFilter::draw(QPainter *p, - const QPointF &pos, - const QPixmap &px, - const QRectF &src) const -{ - Q_D(const QPixmapDropShadowFilter); - - if (px.isNull()) - return; - - QPixmapFilter *filter = p->paintEngine() && p->paintEngine()->isExtended() ? - static_cast<QPaintEngineEx *>(p->paintEngine())->pixmapFilter(type(), this) : 0; - QPixmapDropShadowFilter *dropShadowFilter = static_cast<QPixmapDropShadowFilter*>(filter); - if (dropShadowFilter) { - dropShadowFilter->setColor(d->color); - dropShadowFilter->setBlurRadius(d->radius); - dropShadowFilter->setOffset(d->offset); - dropShadowFilter->draw(p, pos, px, src); - return; - } - - QImage tmp(px.size(), QImage::Format_ARGB32_Premultiplied); - tmp.fill(0); - QPainter tmpPainter(&tmp); - tmpPainter.setCompositionMode(QPainter::CompositionMode_Source); - tmpPainter.drawPixmap(d->offset, px); - tmpPainter.end(); - - // blur the alpha channel - QImage blurred(tmp.size(), QImage::Format_ARGB32_Premultiplied); - blurred.fill(0); - QPainter blurPainter(&blurred); - qt_blurImage(&blurPainter, tmp, d->radius, false, true); - blurPainter.end(); - - tmp = blurred; - - // blacken the image... - tmpPainter.begin(&tmp); - tmpPainter.setCompositionMode(QPainter::CompositionMode_SourceIn); - tmpPainter.fillRect(tmp.rect(), d->color); - tmpPainter.end(); - - // draw the blurred drop shadow... - p->drawImage(pos, tmp); - - // Draw the actual pixmap... - p->drawPixmap(pos, px, src); -} - -QT_END_NAMESPACE - -#endif //QT_NO_GRAPHICSEFFECT |