interface/quantize.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        quantize.h
   3 // Purpose:     interface of wxQuantize
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxQuantize
  11     @wxheader{quantize.h}
  12
  13     Performs quantization, or colour reduction, on a wxImage.
  14
  15     Functions in this class are static and so a wxQuantize object need not be
  16     created.
  17
  18     @library{wxcore}
  19     @category{misc}
  20 */
  21 class wxQuantize : public wxObject
  22 {
  23 public:
  24     /**
  25         Constructor. You do not need to construct a wxQuantize object since its
  26         functions are static.
  27     */
  28     wxQuantize();
  29
  30     /**
  31         Converts input bitmap(s) into 8bit representation with custom palette.
  32         @a in_rows and @a out_rows are arrays [0..h-1] of pointer to rows
  33         (@a in_rows contains @a w * 3 bytes per row, @a out_rows @a w bytes per row).
  34         Fills @a out_rows with indexes into palette (which is also stored into @a palette
  35         variable).
  36     */
  37     void DoQuantize(unsigned w, unsigned h, unsigned char** in_rows,
  38                     unsigned char** out_rows, unsigned char* palette,
  39                     int desiredNoColours);
  40
  41     /**
  42         Reduce the colours in the source image and put the result into the destination image.
  43         Both images may be the same, to overwrite the source image.
  44
  45         Specify an optional palette pointer to receive the resulting palette.
  46         This palette may be passed to ConvertImageToBitmap, for example.
  47     */
  48     bool Quantize(const wxImage& src, wxImage& dest,
  49                   wxPalette** pPalette, int desiredNoColours = 236,
  50                   unsigned char** eightBitData = 0,
  51                   int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS
  52                              |wxQUANTIZE_FILL_DESTINATION_IMAGE
  53                              |wxQUANTIZE_RETURN_8BIT_DATA);
  54
  55     /**
  56         This version sets a palette in the destination image so you don't
  57         have to manage it yourself.
  58     */
  59     bool Quantize(const wxImage& src, wxImage& dest,
  60                   int desiredNoColours = 236,
  61                   unsigned char** eightBitData = 0,
  62                   int flags = wxQUANTIZE_INCLUDE_WINDOWS_COLOURS
  63                              |wxQUANTIZE_FILL_DESTINATION_IMAGE
  64                              |wxQUANTIZE_RETURN_8BIT_DATA);
  65 };
  66