From 48124977865b76212ef719b19ff37d6bd82ad82d Mon Sep 17 00:00:00 2001 From: Kai Uwe Broulik Date: Fri, 2 Feb 2024 13:27:59 +0100 Subject: Move qt_blurImage to Qt GUI MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Allows to use it without Qt Widgets or Qt Graphics Views. Since anyone having imported this through Qt Widget will also be linking Qt Gui this should be compatible. qt_halfScaled is also unexported for lack of known users. Change-Id: I39406dfd4839ed46f8cbfd4651577ab6ece9932c Reviewed-by: Tor Arne Vestbø --- src/widgets/effects/qpixmapfilter.cpp | 309 +--------------------------------- 1 file changed, 2 insertions(+), 307 deletions(-) (limited to 'src/widgets') diff --git a/src/widgets/effects/qpixmapfilter.cpp b/src/widgets/effects/qpixmapfilter.cpp index 1a000e3be0..fc3ea8bba3 100644 --- a/src/widgets/effects/qpixmapfilter.cpp +++ b/src/widgets/effects/qpixmapfilter.cpp @@ -15,7 +15,6 @@ #include "private/qpaintengine_raster_p.h" #include "qmath.h" #include "private/qmath_p.h" -#include "private/qmemrotate_p.h" #include "private/qdrawhelper_p.h" #include @@ -555,314 +554,10 @@ QRectF QPixmapBlurFilter::boundingRectFor(const QRectF &rect) const return rect.adjusted(-delta, -delta, delta, delta); } -template -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 -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(*pixel) & Z_MASK; - const int R_zprec = qt_static_shift(*pixel) & Z_MASK; - const int G_zprec = qt_static_shift(*pixel) & Z_MASK; - const int B_zprec = qt_static_shift(*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 -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 -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(bptr, zA, alpha); - else - qt_blurinner(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(bptr, zA, alpha); - else - qt_blurinner(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 -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 - || img.format() == QImage::Format_Grayscale8); - - // 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<(img, row, alpha); - } - - QImage temp(img.height(), img.width(), img.format()); - temp.setDevicePixelRatio(img.devicePixelRatio()); - if (transposed >= 0) { - if (img.depth() == 8) { - qt_memrotate270(reinterpret_cast(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast(temp.bits()), - temp.bytesPerLine()); - } else { - qt_memrotate270(reinterpret_cast(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast(temp.bits()), - temp.bytesPerLine()); - } - } else { - if (img.depth() == 8) { - qt_memrotate90(reinterpret_cast(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast(temp.bits()), - temp.bytesPerLine()); - } else { - qt_memrotate90(reinterpret_cast(img.bits()), - img.width(), img.height(), img.bytesPerLine(), - reinterpret_cast(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(temp, row, alpha); - } - - if (transposed == 0) { - if (img.depth() == 8) { - qt_memrotate90(reinterpret_cast(temp.bits()), - temp.width(), temp.height(), temp.bytesPerLine(), - reinterpret_cast(img.bits()), - img.bytesPerLine()); - } else { - qt_memrotate90(reinterpret_cast(temp.bits()), - temp.width(), temp.height(), temp.bytesPerLine(), - reinterpret_cast(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_WIDGETS_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 || source.format() == QImage::Format_Grayscale8) { - // assumes grayscale - QImage dest(source.width() / 2, source.height() / 2, srcImage.format()); - dest.setDevicePixelRatio(source.devicePixelRatio()); - - const uchar *src = reinterpret_cast(const_cast(srcImage).bits()); - qsizetype sx = srcImage.bytesPerLine(); - qsizetype sx2 = sx << 1; - - uchar *dst = reinterpret_cast(dest.bits()); - qsizetype 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()); - dest.setDevicePixelRatio(source.devicePixelRatio()); - - const uchar *src = reinterpret_cast(const_cast(srcImage).bits()); - qsizetype sx = srcImage.bytesPerLine(); - qsizetype sx2 = sx << 1; - - uchar *dst = reinterpret_cast(dest.bits()); - qsizetype 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()); - dest.setDevicePixelRatio(source.devicePixelRatio()); - - const quint32 *src = reinterpret_cast(const_cast(srcImage).bits()); - qsizetype sx = srcImage.bytesPerLine() >> 2; - qsizetype sx2 = sx << 1; - - quint32 *dst = reinterpret_cast(dest.bits()); - qsizetype 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_WIDGETS_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 = std::move(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(QPoint(0, 0), blurImage.deviceIndependentSize().toSize()), blurImage); - } -} - -Q_WIDGETS_EXPORT void qt_blurImage(QImage &blurImage, qreal radius, bool quality, int transposed = 0) -{ - if (blurImage.format() == QImage::Format_Indexed8 || blurImage.format() == QImage::Format_Grayscale8) - expblur<12, 10, true>(blurImage, radius, quality, transposed); - else - expblur<12, 10, false>(blurImage, radius, quality, transposed); -} - Q_GUI_EXPORT extern bool qt_scaleForTransform(const QTransform &transform, qreal *scale); +Q_GUI_EXPORT extern void qt_blurImage(QPainter *p, QImage &blurImage, qreal radius, bool quality, bool alphaOnly, int transposed = 0); + /*! \internal */ -- cgit v1.2.3