## wxQuantize

Performs quantization, or colour reduction, on a wxImage.

Functions in this class are static and so a wxQuantize object need not be created.

Derived from

wxObject

Include files

<wx/quantize.h>

Members

wxQuantize::wxQuantize
wxQuantize::Quantize
wxQuantize::DoQuantize

### wxQuantize::wxQuantize

wxQuantize()

Constructor. You do not need to construct a wxQuantize object since its functions are static.

### wxQuantize::Quantize

bool Quantize(const wxImage& src, wxImage& dest, wxPalette** pPalette, int desiredNoColours = 236, unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA)

Reduce the colours in the source image and put the result into the destination image. Both images may be the same, to overwrite the source image. Specify an optional palette pointer to receive the resulting palette. This palette may be passed to ConvertImageToBitmap, for example.

If you pass a palette pointer, you must free the palette yourself.

bool Quantize(const wxImage& src, wxImage& dest, int desiredNoColours = 236, unsigned char** eightBitData = 0, int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS|wxQUANTIZE_FILL_DESTINATION_IMAGE|wxQUANTIZE_RETURN_8BIT_DATA)

This version sets a palette in the destination image so you don't have to manage it yourself.

### wxQuantize::DoQuantize

void DoQuantize(unsigned w, unsigned h, unsigned char** in_rows, unsigned char** out_rows, unsigned char* palette, int desiredNoColours)

Converts input bitmap(s) into 8bit representation with custom palette.

in_rows and out_rows are arrays [0..h-1] of pointer to rows (in_rows contains w * 3 bytes per row, out_rows w bytes per row).

Fills out_rows with indexes into palette (which is also stored into palette variable).