diff options
Diffstat (limited to 'src/gui/image/qimage.cpp')
| -rw-r--r-- | src/gui/image/qimage.cpp | 327 |
1 files changed, 58 insertions, 269 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index 2779b97fbd..08b1373f96 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -73,7 +73,7 @@ QT_BEGIN_NAMESPACE static inline bool isLocked(QImageData *data) { - return data != 0 && data->is_locked; + return data != nullptr && data->is_locked; } #if defined(Q_CC_DEC) && defined(__alpha) && (__DECCXX_VER-0 >= 50190001) @@ -99,15 +99,15 @@ static int next_qimage_serial_number() } QImageData::QImageData() - : ref(0), width(0), height(0), depth(0), nbytes(0), devicePixelRatio(1.0), data(0), + : ref(0), width(0), height(0), depth(0), nbytes(0), devicePixelRatio(1.0), data(nullptr), format(QImage::Format_ARGB32), bytes_per_line(0), ser_no(next_qimage_serial_number()), detach_no(0), dpmx(qt_defaultDpiX() * 100 / qreal(2.54)), dpmy(qt_defaultDpiY() * 100 / qreal(2.54)), offset(0, 0), own_data(true), ro_data(false), has_alpha_clut(false), - is_cached(false), is_locked(false), cleanupFunction(0), cleanupInfo(0), - paintEngine(0) + is_cached(false), is_locked(false), cleanupFunction(nullptr), cleanupInfo(nullptr), + paintEngine(nullptr) { } @@ -170,7 +170,7 @@ QImageData::~QImageData() delete paintEngine; if (data && own_data) free(data); - data = 0; + data = nullptr; } #if defined(_M_ARM) @@ -746,7 +746,7 @@ bool QImageData::checkForAlphaPixels() const QImage::QImage() noexcept : QPaintDevice() { - d = 0; + d = nullptr; } /*! @@ -955,7 +955,7 @@ QImage::QImage(const uchar *data, int width, int height, int bytesPerLine, Forma QImage::QImage(const QString &fileName, const char *format) : QPaintDevice() { - d = 0; + d = nullptr; load(fileName, format); } @@ -981,10 +981,10 @@ extern bool qt_read_xpm_image_or_array(QIODevice *device, const char * const *so QImage::QImage(const char * const xpm[]) : QPaintDevice() { - d = 0; + d = nullptr; if (!xpm) return; - if (!qt_read_xpm_image_or_array(0, xpm, *this)) + if (!qt_read_xpm_image_or_array(nullptr, xpm, *this)) // Issue: Warning because the constructor may be ambigious qWarning("QImage::QImage(), XPM is not supported"); } @@ -1003,7 +1003,7 @@ QImage::QImage(const QImage &image) : QPaintDevice() { if (image.paintingActive() || isLocked(image.d)) { - d = 0; + d = nullptr; image.copy().swap(*this); } else { d = image.d; @@ -1381,11 +1381,7 @@ int QImage::colorCount() const \sa colorTable(), setColor(), {QImage#Image Transformations}{Image Transformations} */ -#if QT_VERSION >= QT_VERSION_CHECK(6,0,0) void QImage::setColorTable(const QVector<QRgb> &colors) -#else -void QImage::setColorTable(const QVector<QRgb> colors) -#endif { if (!d) return; @@ -1395,11 +1391,7 @@ void QImage::setColorTable(const QVector<QRgb> colors) if (!d) return; -#if QT_VERSION >= QT_VERSION_CHECK(6,0,0) d->colortable = colors; -#else - d->colortable = std::move(const_cast<QVector<QRgb>&>(colors)); -#endif d->has_alpha_clut = false; for (int i = 0; i < d->colortable.size(); ++i) { if (qAlpha(d->colortable.at(i)) != 255) { @@ -1472,25 +1464,6 @@ void QImage::setDevicePixelRatio(qreal scaleFactor) d->devicePixelRatio = scaleFactor; } -#if QT_DEPRECATED_SINCE(5, 10) -/*! - \since 4.6 - \obsolete - Returns the number of bytes occupied by the image data. - - Note this method should never be called on an image larger than 2 gigabytes. - Instead use sizeInBytes(). - - \sa sizeInBytes(), bytesPerLine(), bits(), {QImage#Image Information}{Image - Information} -*/ -int QImage::byteCount() const -{ - Q_ASSERT(!d || d->nbytes < std::numeric_limits<int>::max()); - return d ? int(d->nbytes) : 0; -} -#endif - /*! \since 5.10 Returns the image data size in bytes. @@ -1510,17 +1483,10 @@ qsizetype QImage::sizeInBytes() const \sa scanLine() */ -#if QT_VERSION >= QT_VERSION_CHECK(6,0,0) qsizetype QImage::bytesPerLine() const { return d ? d->bytes_per_line : 0; } -#else -int QImage::bytesPerLine() const -{ - return d ? d->bytes_per_line : 0; -} -#endif /*! @@ -1593,13 +1559,13 @@ void QImage::setColor(int i, QRgb c) uchar *QImage::scanLine(int i) { if (!d) - return 0; + return nullptr; detach(); // In case detach() ran out of memory if (!d) - return 0; + return nullptr; return d->data + i * d->bytes_per_line; } @@ -1610,7 +1576,7 @@ uchar *QImage::scanLine(int i) const uchar *QImage::scanLine(int i) const { if (!d) - return 0; + return nullptr; Q_ASSERT(i >= 0 && i < height()); return d->data + i * d->bytes_per_line; @@ -1633,7 +1599,7 @@ const uchar *QImage::scanLine(int i) const const uchar *QImage::constScanLine(int i) const { if (!d) - return 0; + return nullptr; Q_ASSERT(i >= 0 && i < height()); return d->data + i * d->bytes_per_line; @@ -1653,12 +1619,12 @@ const uchar *QImage::constScanLine(int i) const uchar *QImage::bits() { if (!d) - return 0; + return nullptr; detach(); // In case detach ran out of memory... if (!d) - return 0; + return nullptr; return d->data; } @@ -1672,7 +1638,7 @@ uchar *QImage::bits() */ const uchar *QImage::bits() const { - return d ? d->data : 0; + return d ? d->data : nullptr; } @@ -1688,7 +1654,7 @@ const uchar *QImage::bits() const */ const uchar *QImage::constBits() const { - return d ? d->data : 0; + return d ? d->data : nullptr; } /*! @@ -1912,10 +1878,10 @@ void QImage::invertPixels(InvertMode mode) // Inverting premultiplied pixels would produce invalid image data. if (hasAlphaChannel() && qPixelLayouts[d->format].premultiplied) { if (depth() > 32) { - if (!d->convertInPlace(QImage::Format_RGBA64, 0)) + if (!d->convertInPlace(QImage::Format_RGBA64, { })) *this = convertToFormat(QImage::Format_RGBA64); } else { - if (!d->convertInPlace(QImage::Format_ARGB32, 0)) + if (!d->convertInPlace(QImage::Format_ARGB32, { })) *this = convertToFormat(QImage::Format_ARGB32); } } @@ -1982,7 +1948,7 @@ void QImage::invertPixels(InvertMode mode) } if (originalFormat != d->format) { - if (!d->convertInPlace(originalFormat, 0)) + if (!d->convertInPlace(originalFormat, { })) *this = convertToFormat(originalFormat); } } @@ -2060,27 +2026,6 @@ QImage::Format QImage::format() const \sa {Image Formats} */ -static bool highColorPrecision(QImage::Format format) -{ - // Formats with higher color precision than ARGB32_Premultiplied. - switch (format) { - case QImage::Format_ARGB32: - case QImage::Format_RGBA8888: - case QImage::Format_BGR30: - case QImage::Format_RGB30: - case QImage::Format_A2BGR30_Premultiplied: - case QImage::Format_A2RGB30_Premultiplied: - case QImage::Format_RGBX64: - case QImage::Format_RGBA64: - case QImage::Format_RGBA64_Premultiplied: - case QImage::Format_Grayscale16: - return true; - default: - break; - } - return false; -} - /*! \internal */ @@ -2092,9 +2037,11 @@ QImage QImage::convertToFormat_helper(Format format, Qt::ImageConversionFlags fl if (format == Format_Invalid || d->format == Format_Invalid) return QImage(); + const QPixelLayout *destLayout = &qPixelLayouts[format]; Image_Converter converter = qimage_converter_map[d->format][format]; if (!converter && format > QImage::Format_Indexed8 && d->format > QImage::Format_Indexed8) { - if (highColorPrecision(format) && highColorPrecision(d->format)) { + if (qt_highColorPrecision(d->format, !destLayout->hasAlphaChannel) + && qt_highColorPrecision(format, !hasAlphaChannel())) { converter = convert_generic_to_rgb64; } else converter = convert_generic; @@ -3046,11 +2993,11 @@ QImage QImage::createHeuristicMask(bool clipTight) const while(!done) { done = true; ypn = m.scanLine(0); - ypc = 0; + ypc = nullptr; for (y = 0; y < h; y++) { ypp = ypc; ypc = ypn; - ypn = (y == h-1) ? 0 : m.scanLine(y+1); + ypn = (y == h-1) ? nullptr : m.scanLine(y+1); const QRgb *p = (const QRgb *)scanLine(y); for (x = 0; x < w; x++) { // slowness here - it's possible to do six of these tests @@ -3072,11 +3019,11 @@ QImage QImage::createHeuristicMask(bool clipTight) const if (!clipTight) { ypn = m.scanLine(0); - ypc = 0; + ypc = nullptr; for (y = 0; y < h; y++) { ypp = ypc; ypc = ypn; - ypn = (y == h-1) ? 0 : m.scanLine(y+1); + ypn = (y == h-1) ? nullptr : m.scanLine(y+1); const QRgb *p = (const QRgb *)scanLine(y); for (x = 0; x < w; x++) { if ((*p & 0x00ffffff) != background) { @@ -4073,75 +4020,14 @@ void QImage::setText(const QString &key, const QString &value) } /*! - \fn QString QImage::text(const char* key, const char* language) const - \obsolete - - Returns the text recorded for the given \a key in the given \a - language, or in a default language if \a language is 0. - - Use text() instead. - - The language the text is recorded in is no longer relevant since - the text is always set using QString and UTF-8 representation. -*/ - -/*! - \fn QString QImage::text(const QImageTextKeyLang& keywordAndLanguage) const - \overload - \obsolete - - Returns the text recorded for the given \a keywordAndLanguage. - - Use text() instead. - - The language the text is recorded in is no longer relevant since - the text is always set using QString and UTF-8 representation. -*/ - -/*! - \fn void QImage::setText(const char* key, const char* language, const QString& text) - \obsolete - - Sets the image text to the given \a text and associate it with the - given \a key. The text is recorded in the specified \a language, - or in a default language if \a language is 0. - - Use setText() instead. - - The language the text is recorded in is no longer relevant since - the text is always set using QString and UTF-8 representation. - - \omit - Records string \a for the keyword \a key. The \a key should be - a portable keyword recognizable by other software - some suggested - values can be found in - \l{http://www.libpng.org/pub/png/spec/1.2/png-1.2-pdg.html#C.Anc-text} - {the PNG specification}. \a s can be any text. \a lang should - specify the language code (see - \l{http://www.rfc-editor.org/rfc/rfc1766.txt}{RFC 1766}) or 0. - \endomit -*/ - -/* - Sets the image bits to the \a pixmap contents and returns a - reference to the image. - - If the image shares data with other images, it will first - dereference the shared data. - - Makes a call to QPixmap::convertToImage(). -*/ - -/*! \internal Used by QPainter to retrieve a paint engine for the image. */ - QPaintEngine *QImage::paintEngine() const { if (!d) - return 0; + return nullptr; if (!d->paintEngine) { QPaintDevice *paintDevice = const_cast<QImage *>(this); @@ -4383,22 +4269,6 @@ bool qt_xForm_helper(const QTransform &trueMat, int xoffset, int type, int depth #undef IWX_LSB #undef IWX_PIX -/*! \fn int QImage::serialNumber() const - \obsolete - Returns a number that identifies the contents of this - QImage object. Distinct QImage objects can only have the same - serial number if they refer to the same contents (but they don't - have to). - - Use cacheKey() instead. - - \warning The serial number doesn't necessarily change when the - image is altered. This means that it may be dangerous to use - it as a cache key. - - \sa operator==() -*/ - /*! Returns a number that identifies the contents of this QImage object. Distinct QImage objects can only have the same key if they @@ -4429,99 +4299,61 @@ bool QImage::isDetached() const /*! - \obsolete Sets the alpha channel of this image to the given \a alphaChannel. - If \a alphaChannel is an 8 bit grayscale image, the intensity values are - written into this buffer directly. Otherwise, \a alphaChannel is converted - to 32 bit and the intensity of the RGB pixel values is used. + If \a alphaChannel is an 8 bit alpha image, the alpha values are + used directly. Otherwise, \a alphaChannel is converted to 8 bit + grayscale and the intensity of the pixel values is used. - Note that the image will be converted to the Format_ARGB32_Premultiplied - format if the function succeeds. + If the image already has an alpha channel, the existing alpha channel + is multiplied with the new one. If the image doesn't have an alpha + channel it will be converted to a format that does. - Use one of the composition modes in QPainter::CompositionMode instead. + The operation is similar to painting \a alphaChannel as an alpha image + over this image using \c QPainter::CompositionMode_DestinationIn. - \warning This function is expensive. - - \sa alphaChannel(), {QImage#Image Transformations}{Image - Transformations}, {QImage#Image Formats}{Image Formats} + \sa hasAlphaChannel(), alphaChannel(), + {QImage#Image Transformations}{Image Transformations}, + {QImage#Image Formats}{Image Formats} */ void QImage::setAlphaChannel(const QImage &alphaChannel) { - if (!d) + if (!d || alphaChannel.isNull()) return; - int w = d->width; - int h = d->height; - - if (w != alphaChannel.d->width || h != alphaChannel.d->height) { - qWarning("QImage::setAlphaChannel: " - "Alpha channel must have same dimensions as the target image"); - return; - } - if (d->paintEngine && d->paintEngine->isActive()) { qWarning("QImage::setAlphaChannel: " "Unable to set alpha channel while image is being painted on"); return; } - if (d->format == QImage::Format_ARGB32_Premultiplied) + const Format alphaFormat = qt_alphaVersionForPainting(d->format); + if (d->format == alphaFormat) detach(); else - *this = convertToFormat(QImage::Format_ARGB32_Premultiplied); + convertTo(alphaFormat); if (isNull()) return; - // Slight optimization since alphachannels are returned as 8-bit grays. - if (alphaChannel.format() == QImage::Format_Alpha8 ||( alphaChannel.d->depth == 8 && alphaChannel.isGrayscale())) { - const uchar *src_data = alphaChannel.d->data; - uchar *dest_data = d->data; - for (int y=0; y<h; ++y) { - const uchar *src = src_data; - QRgb *dest = (QRgb *)dest_data; - for (int x=0; x<w; ++x) { - int alpha = *src; - int destAlpha = qt_div_255(alpha * qAlpha(*dest)); - *dest = ((destAlpha << 24) - | (qt_div_255(qRed(*dest) * alpha) << 16) - | (qt_div_255(qGreen(*dest) * alpha) << 8) - | (qt_div_255(qBlue(*dest) * alpha))); - ++dest; - ++src; - } - src_data += alphaChannel.d->bytes_per_line; - dest_data += d->bytes_per_line; - } + QImage sourceImage; + if (alphaChannel.format() == QImage::Format_Alpha8 || (alphaChannel.d->depth == 8 && alphaChannel.isGrayscale())) + sourceImage = alphaChannel; + else + sourceImage = alphaChannel.convertToFormat(QImage::Format_Grayscale8); + if (!sourceImage.reinterpretAsFormat(QImage::Format_Alpha8)) + return; - } else { - const QImage sourceImage = alphaChannel.convertToFormat(QImage::Format_RGB32); - if (sourceImage.isNull()) - return; - const uchar *src_data = sourceImage.d->data; - uchar *dest_data = d->data; - for (int y=0; y<h; ++y) { - const QRgb *src = (const QRgb *) src_data; - QRgb *dest = (QRgb *) dest_data; - for (int x=0; x<w; ++x) { - int alpha = qGray(*src); - int destAlpha = qt_div_255(alpha * qAlpha(*dest)); - *dest = ((destAlpha << 24) - | (qt_div_255(qRed(*dest) * alpha) << 16) - | (qt_div_255(qGreen(*dest) * alpha) << 8) - | (qt_div_255(qBlue(*dest) * alpha))); - ++dest; - ++src; - } - src_data += sourceImage.d->bytes_per_line; - dest_data += d->bytes_per_line; - } - } + QPainter painter(this); + if (sourceImage.size() != size()) + painter.setRenderHint(QPainter::SmoothPixmapTransform); + painter.setCompositionMode(QPainter::CompositionMode_DestinationIn); + painter.drawImage(rect(), sourceImage); } +#if QT_DEPRECATED_SINCE(5, 15) /*! \obsolete @@ -4611,6 +4443,7 @@ QImage QImage::alphaChannel() const return image; } +#endif /*! Returns \c true if the image has a format that respects the alpha @@ -5141,50 +4974,6 @@ QDebug operator<<(QDebug dbg, const QImage &i) } #endif -/*! - \fn void QImage::setNumColors(int n) - \obsolete - - Resizes the color table to contain \a n entries. - - \sa setColorCount() - */ - -/*! - \fn int QImage::numBytes() const - \obsolete - - Returns the number of bytes occupied by the image data. - - \sa sizeInBytes() - */ - -/*! - \fn QStringList QImage::textLanguages() const - \obsolete - - Returns the language identifiers for which some texts are recorded. - Note that if you want to iterate over the list, you should iterate over a copy. - - The language the text is recorded in is no longer relevant since the text is - always set using QString and UTF-8 representation. - - \sa textKeys() - */ - -/*! - \fn QList<QImageTextKeyLang> QImage::textList() const - \obsolete - - Returns a list of QImageTextKeyLang objects that enumerate all the texts - key/language pairs set for this image. - - The language the text is recorded in is no longer relevant since the text - is always set using QString and UTF-8 representation. - - \sa textKeys() - */ - static Q_CONSTEXPR QPixelFormat pixelformats[] = { //QImage::Format_Invalid: QPixelFormat(), |