diff options
Diffstat (limited to 'src/gui/image/qimage.cpp')
| -rw-r--r-- | src/gui/image/qimage.cpp | 40 |
1 files changed, 38 insertions, 2 deletions
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp index 4f5efa1..6bcf72b 100644 --- a/src/gui/image/qimage.cpp +++ b/src/gui/image/qimage.cpp @@ -1835,7 +1835,7 @@ void QImage::setColor(int i, QRgb c) qAlpha() to access the pixels. \sa bytesPerLine(), bits(), {QImage#Pixel Manipulation}{Pixel - Manipulation} + Manipulation}, constScanLine() */ uchar *QImage::scanLine(int i) { @@ -1865,6 +1865,28 @@ const uchar *QImage::scanLine(int i) const /*! + Returns a pointer to the pixel data at the scanline with index \a + i. The first scanline is at index 0. + + The scanline data is aligned on a 32-bit boundary. + + Note that QImage uses \l{Implicit Data Sharing} {implicit data + sharing}, but this function does \e not perform a deep copy of the + shared pixel data, because the returned data is const. + + \sa scanLine(), constBits() + \since 4.7 +*/ +const uchar *QImage::constScanLine(int i) const +{ + if (!d) + return 0; + + Q_ASSERT(i >= 0 && i < height()); + return d->data + i * d->bytes_per_line; +} + +/*! Returns a pointer to the first pixel data. This is equivalent to scanLine(0). @@ -1873,7 +1895,7 @@ const uchar *QImage::scanLine(int i) const data, thus ensuring that this QImage is the only one using the current return value. - \sa scanLine(), byteCount() + \sa scanLine(), byteCount(), constBits() */ uchar *QImage::bits() { @@ -1901,6 +1923,20 @@ const uchar *QImage::bits() const } +/*! + Returns a pointer to the first pixel data. + + Note that QImage uses \l{Implicit Data Sharing} {implicit data + sharing}, but this function does \e not perform a deep copy of the + shared pixel data, because the returned data is const. + + \sa bits(), constScanLine() + \since 4.7 +*/ +const uchar *QImage::constBits() const +{ + return d ? d->data : 0; +} /*! \fn void QImage::reset() |