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Fixed Colormap Quantizer base class. More...
#include <ilviews/bitmaps/fixquant.h>
Public Member Functions | |
IlvFixedQuantizer (IlvColorMap *cmap=0) | |
Constructor. | |
~IlvFixedQuantizer () | |
Destructor. | |
IlvColorMap * | computeColorMap (const IlvBitmapData *data, IlUInt numcolors) |
Returns the colormap. |
Fixed Colormap Quantizer base class.
Library: display
This class provides methods to convert true color images to indexed images using a fixed colormap (The colormap is not computed from the source image). This class has two subclasses:
IlvQuickQuantizer
to remap to colors well distributed in the color cube (colors are computed using 3 bits for red and green and 2 bits for blue). IlvNetscapeQuantizer
to remap to the predefined Netscape colormap (it uses 216 colors). IlvFixedQuantizer::IlvFixedQuantizer | ( | IlvColorMap * | cmap = 0 |
) |
Constructor.
cmap | The colormap to use. |
IlvFixedQuantizer::~IlvFixedQuantizer | ( | ) |
Destructor.
The default implementation unlocks the colormap.
IlvColorMap* IlvFixedQuantizer::computeColorMap | ( | const IlvBitmapData * | data, | |
IlUInt | numcolors | |||
) | [virtual] |
Returns the colormap.
data | The original true color bitmap data. | |
numcolors | The requested number of colors, ignored as the colormap is precomputed. |
Implements IlvQuantizer.
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