diff options
Diffstat (limited to 'src/gui/image/qimage.cpp')
| -rw-r--r-- | src/gui/image/qimage.cpp | 117 |
1 files changed, 108 insertions, 9 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index cd0cbf7f49..3c192a237e 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -476,6 +476,10 @@ bool QImageData::checkForAlphaPixels() const \snippet code/src_gui_image_qimage.cpp 1 \endtable + For images with more than 8-bit per color-channel. The methods + setPixelColor() and pixelColor() can be used to set and get + with QColor values. + QImage also provide the scanLine() function which returns a pointer to the pixel data at the scanline with the given index, and the bits() function which returns a pointer to the first pixel @@ -1769,11 +1773,11 @@ void QImage::fill(const QColor &color) break; case QImage::Format_BGR30: case QImage::Format_A2BGR30_Premultiplied: - fill(qConvertArgb32ToA2rgb30<PixelOrderBGR>(color.rgba())); + fill(qConvertRgb64ToRgb30<PixelOrderBGR>(color.rgba64())); break; case QImage::Format_RGB30: case QImage::Format_A2RGB30_Premultiplied: - fill(qConvertArgb32ToA2rgb30<PixelOrderRGB>(color.rgba())); + fill(qConvertRgb64ToRgb30<PixelOrderRGB>(color.rgba64())); break; case QImage::Format_RGB16: fill((uint) qConvertRgb32To16(color.rgba())); @@ -2190,9 +2194,10 @@ int QImage::pixelIndex(int x, int y) const If the \a position is not valid, the results are undefined. \warning This function is expensive when used for massive pixel - manipulations. + manipulations. Use constBits() or constScanLine() when many + pixels needs to be read. - \sa setPixel(), valid(), {QImage#Pixel Manipulation}{Pixel + \sa setPixel(), valid(), constBits(), constScanLine(), {QImage#Pixel Manipulation}{Pixel Manipulation} */ @@ -2242,25 +2247,23 @@ QRgb QImage::pixel(int x, int y) const return *layout->convertToARGB32PM(&result, ptr, 1, layout, 0); } - /*! \fn void QImage::setPixel(const QPoint &position, uint index_or_rgb) Sets the pixel index or color at the given \a position to \a index_or_rgb. - If the image's format is either monochrome or 8-bit, the given \a + If the image's format is either monochrome or paletted, the given \a index_or_rgb value must be an index in the image's color table, otherwise the parameter must be a QRgb value. If \a position is not a valid coordinate pair in the image, or if \a index_or_rgb >= colorCount() in the case of monochrome and - 8-bit images, the result is undefined. + paletted images, the result is undefined. \warning This function is expensive due to the call of the internal \c{detach()} function called within; if performance is a concern, we - recommend the use of \l{QImage::}{scanLine()} to access pixel data - directly. + recommend the use of scanLine() or bits() to access pixel data directly. \sa pixel(), {QImage#Pixel Manipulation}{Pixel Manipulation} */ @@ -2348,6 +2351,102 @@ void QImage::setPixel(int x, int y, uint index_or_rgb) } /*! + \fn QColor QImage::pixelColor(const QPoint &position) const + \since 5.6 + + Returns the color of the pixel at the given \a position as a QColor. + + If the \a position is not valid, an invalid QColor is returned. + + \warning This function is expensive when used for massive pixel + manipulations. Use constBits() or constScanLine() when many + pixels needs to be read. + + \sa setPixel(), valid(), constBits(), constScanLine(), {QImage#Pixel Manipulation}{Pixel + Manipulation} +*/ + +/*! + \overload + \since 5.6 + + Returns the color of the pixel at coordinates (\a x, \a y) as a QColor. +*/ +QColor QImage::pixelColor(int x, int y) const +{ + if (!d || x < 0 || x >= d->width || y < 0 || y >= height()) { + qWarning("QImage::pixelColor: coordinate (%d,%d) out of range", x, y); + return QColor(); + } + + const uchar * s = constScanLine(y); + switch (d->format) { + case Format_BGR30: + case Format_A2BGR30_Premultiplied: + return QColor(qConvertA2rgb30ToRgb64<PixelOrderBGR>(reinterpret_cast<const quint32 *>(s)[x])); + case Format_RGB30: + case Format_A2RGB30_Premultiplied: + return QColor(qConvertA2rgb30ToRgb64<PixelOrderRGB>(reinterpret_cast<const quint32 *>(s)[x])); + default: + return QColor(pixel(x, y)); + } +} + +/*! + \fn void QImage::setPixelColor(const QPoint &position, const QColor &color) + \since 5.6 + + Sets the color at the given \a position to \a color. + + If \a position is not a valid coordinate pair in the image, or + the image's format is either monochrome or paletted, the result is undefined. + + \warning This function is expensive due to the call of the internal + \c{detach()} function called within; if performance is a concern, we + recommend the use of scanLine() or bits() to access pixel data directly. + + \sa pixel(), bits(), scanLine(), {QImage#Pixel Manipulation}{Pixel Manipulation} +*/ + +/*! + \overload + \since 5.6 + + Sets the pixel color at (\a x, \a y) to \a color. +*/ +void QImage::setPixelColor(int x, int y, const QColor &color) +{ + if (!d || x < 0 || x >= width() || y < 0 || y >= height() || !color.isValid()) { + qWarning("QImage::setPixelColor: coordinate (%d,%d) out of range", x, y); + return; + } + // detach is called from within scanLine + uchar * s = scanLine(y); + switch (d->format) { + case Format_Mono: + case Format_MonoLSB: + case Format_Indexed8: + qWarning("QImage::setPixelColor: called on monochrome or indexed format"); + return; + case Format_BGR30: + ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderBGR>(color.rgba64()) | 0xc0000000; + return; + case Format_A2BGR30_Premultiplied: + ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderBGR>(color.rgba64()); + return; + case Format_RGB30: + ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderRGB>(color.rgba64()) | 0xc0000000; + return; + case Format_A2RGB30_Premultiplied: + ((uint *)s)[x] = qConvertRgb64ToRgb30<PixelOrderRGB>(color.rgba64()); + return; + default: + setPixel(x, y, color.rgba()); + return; + } +} + +/*! Returns \c true if all the colors in the image are shades of gray (i.e. their red, green and blue components are equal); otherwise false. |