rosapps/smartpdf/poppler/splash/SplashScreen.h

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