pdftops/SplashScreen.h

   1 //========================================================================
   2 //
   3 // SplashScreen.h
   4 //
   5 //========================================================================
   6
   7 #ifndef SPLASHSCREEN_H
   8 #define SPLASHSCREEN_H
   9
  10 #include <config.h>
  11
  12 #ifdef USE_GCC_PRAGMAS
  13 #pragma interface
  14 #endif
  15
  16 #include "SplashTypes.h"
  17
  18 //------------------------------------------------------------------------
  19 // SplashScreen
  20 //------------------------------------------------------------------------
  21
  22 class SplashScreen {
  23 public:
  24
  25   SplashScreen(int sizeA);
  26   SplashScreen(SplashScreen *screen);
  27   ~SplashScreen();
  28
  29   SplashScreen *copy() { return new SplashScreen(this); }
  30
  31   // Return the computed pixel value (0=black, 1=white) for the gray
  32   // level <value> at (<x>, <y>).
  33   int test(int x, int y, SplashCoord value);
  34
  35   // Returns true if value is above the white threshold or below the
  36   // black threshold, i.e., if the corresponding halftone will be
  37   // solid white or black.
  38   GBool isStatic(SplashCoord value);
  39
  40 private:
  41
  42   SplashCoord *mat;             // threshold matrix
  43   int size;                     // size of the threshold matrix
  44   SplashCoord minVal;           // any pixel value below minVal generates
  45                                 //   solid black
  46   SplashCoord maxVal;           // any pixel value above maxVal generates
  47                                 //   solid white
  48 };
  49
  50 #endif