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QImage class documentation update

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2022-02-02 06:48:13 +02:00
parent 65a6e87920
commit 11695cf6dd
1 changed files with 13 additions and 17 deletions
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30
src/gui/image/qimage.cpp
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@ -248,9 +248,8 @@ bool QImageData::checkForAlphaPixels() const
thread.
The QImage class supports several image formats described by the
\l Format enum. These include monochrome, 8-bit, 32-bit and
alpha-blended images which are available in all versions of Qt
4.x.
\l Format enum. These include monochrome, 32-bit and alpha-blended
images.
QImage provides a collection of functions that can be used to
obtain a variety of information about the image. There are also
@ -389,12 +388,12 @@ bool QImageData::checkForAlphaPixels() const
\snippet doc/src/snippets/code/src_gui_image_qimage.cpp 0
\endtable
In case of a 8-bit and monchrome images, the pixel value is only
an index from the image's color table. So the setPixel() function
can only be used to alter the color of the pixel at the given
coordinates to a predefined color from the image's color table,
i.e. it can only change the pixel's index value. To alter or add a
color to an image's color table, use the setColor() function.
In case of monchrome images, the pixel value is only an index from
the image's color table. So the setPixel() function can only be
used to alter the color of the pixel at the given coordinates to a
predefined color from the image's color table, i.e. it can only
change the pixel's index value. To alter or add a color to an
image's color table, use the setColor() function.
An entry in the color table is an ARGB quadruplet encoded as an
QRgb value. Use the qRgb() and qRgba() functions to make a
@ -2270,9 +2269,9 @@ QRgb QImage::pixel(int x, int y) const
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
index_or_rgb value must be an index in the image's color table,
otherwise the parameter must be a QRgb value.
If the image's format is monochrome, 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 >= 2 in the case of monochrome, the result is
@ -2380,11 +2379,8 @@ bool QImage::allGray() const
}
/*!
For 32-bit images, this function is equivalent to allGray().
For 8-bpp images, this function returns true if color(i) is
QRgb(i, i, i) for all indexes of the color table; otherwise
returns false.
For 32-bit images, this function is equivalent to allGray()
otherwise returns false.
\sa allGray(), {QImage#Image Formats}{Image Formats}
*/