src/add-ons/translators/gif/SavePalette.h

   1 ////////////////////////////////////////////////////////////////////////////////
   2 //
   3 //      File: SavePalette.h
   4 //
   5 //      Date: December 1999
   6 //
   7 //      Author: Daniel Switkin
   8 //
   9 //      Copyright 2003 (c) by Daniel Switkin. This file is made publically available
  10 //      under the BSD license, with the stipulations that this complete header must
  11 //      remain at the top of the file indefinitely, and credit must be given to the
  12 //      original author in any about box using this software.
  13 //
  14 ////////////////////////////////////////////////////////////////////////////////
  15
  16 // Additional authors:  John Scipione, <jscipione@gmail.com>
  17
  18 #ifndef SAVE_PALETTE_H
  19 #define SAVE_PALETTE_H
  20
  21
  22 #include "SFHash.h"
  23 #include <GraphicsDefs.h>
  24
  25 enum {
  26         WEB_SAFE_PALETTE = 0,
  27         BEOS_SYSTEM_PALETTE,
  28         GREYSCALE_PALETTE,
  29         OPTIMAL_PALETTE
  30 };
  31
  32 enum {
  33         NO_TRANSPARENCY = 0,
  34         AUTO_TRANSPARENCY,
  35         COLOR_KEY_TRANSPARENCY
  36 };
  37
  38
  39 class BBitmap;
  40
  41 class SavePalette {
  42 public:
  43                                                                 SavePalette(int mode);
  44                                                                 SavePalette(BBitmap* bitmap,
  45                                                                         int32 maxSizeInBits = 8);
  46         virtual                                         ~SavePalette();
  47
  48         inline  bool                            IsValid() const
  49                                                                         { return !fFatalError; }
  50
  51                         uint8                           IndexForColor(uint8 red, uint8 green,
  52                                                                         uint8 blue, uint8 alpha = 255);
  53         inline  uint8                           IndexForColor(const rgb_color& color);
  54
  55         inline  bool                            UseTransparent() const
  56                                                                         { return fTransparentMode > NO_TRANSPARENCY; }
  57
  58                         void                            PrepareForAutoTransparency();
  59         inline  int                                     TransparentIndex() const
  60                                                                         { return fTransparentIndex; }
  61                         void                            SetTransparentColor(uint8 red,
  62                                                                         uint8 green, uint8 blue);
  63
  64         inline  int                                     SizeInBits() const { return fSizeInBits; }
  65
  66         inline  int                                     BackgroundIndex() const
  67                                                                         { return fBackgroundIndex; }
  68
  69                         void                            GetColors(uint8* buffer, int size) const;
  70
  71                         rgb_color*                      pal;
  72
  73 private:
  74                         int                                     fSize;
  75                         int                                     fSizeInBits;
  76                         int                                     fMode;
  77                         uint32                          fTransparentMode;
  78                         int                                     fTransparentIndex;
  79                         int                                     fBackgroundIndex;
  80                         bool                            fFatalError;
  81 };
  82
  83
  84 inline uint8
  85 SavePalette::IndexForColor(const rgb_color& color)
  86 {
  87         return IndexForColor(color.red, color.green, color.blue, color.alpha);
  88 }
  89
  90
  91 #endif  // SAVE_PALETTE_H