QColormap Class▲
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Header: QColormap
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qmake: QT += widgets
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Group: QColormap is part of painting
Detailed Description▲
Member Type Documentation▲
enum QColormap::Mode▲
This enum describes how QColormap maps device independent RGB values to device dependent pixel values.
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Constant |
Value |
Description |
|---|---|---|
|
QColormap::Direct |
0 |
Pixel values are derived directly from the RGB values, also known as "True Color." |
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QColormap::Indexed |
1 |
Pixel values represent indexes into a vector of available colors, i.e. QColormap uses the index of the color that most closely matches an RGB value. |
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QColormap::Gray |
2 |
Similar to Indexed, pixel values represent a vector of available gray tones. QColormap uses the index of the gray tone that most closely matches the computed gray tone of an RGB value. |
Member Function Documentation▲
QColormap::QColormap(const QColormap &colormap)▲
Constructs a copy of another colormap.
QColormap::~QColormap()▲
Destroys the colormap.
const QColor QColormap::colorAt(uint pixel) const▲
const QVector<QColor> QColormap::colormap() const▲
Returns a vector of colors which represents the devices colormap for Indexed and Gray modes. This function returns an empty vector for Direct mode.
See Also▲
See also size()
int QColormap::depth() const▲
[static] QColormap QColormap::instance(int screen = -1)▲
Returns the colormap for the specified screen. If screen is -1, this function returns the colormap for the default screen.
QColormap::Mode QColormap::mode() const▲
uint QColormap::pixel(const QColor &color) const▲
int QColormap::size() const▲
Returns the size of the colormap for Indexed and Gray modes; Returns -1 for Direct mode.
See Also▲
See also colormap()
[since 4.2] QColormap &QColormap::operator=(const QColormap &colormap)▲
Assigns the given colormap to this color map and returns a reference to this color map.
This function was introduced in Qt 4.2.