kc3-lang/freetype/demos/src/ftgrays2.h

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• Hash : 1d85a73d
  Author :
  Date : 2000-03-17T10:15:20
  

  Added a new version of the "smooth". This one uses an algorithm that is very close to our standard raster. However, it is (theorically for now) capable of direct composition !!

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• demos/src/ftgrays2.h

• #ifndef FTGRAYS2_H
  #define FTGRAYS2_H
  
  typedef int   TScan;
  typedef long  TPos;
  typedef float TDist;
  
  #define FT_MAX_GRAY_SPANS  32
  
  typedef struct FT_GraySpan_
  {
    short          x;
    short          len;
    unsigned char  coverage;
  
  } FT_GraySpan;
  
  typedef int (*FT_GraySpan_Func)( int           y,
                                   int           count,
                                   FT_GraySpan*  spans,
                                   void*         user );
                                          
  typedef enum {
  
    dir_up    = 0,
    dir_down  = 1,
    dir_right = 2,
    dir_left  = 3,
  
    dir_horizontal = 2,
    dir_reverse    = 1,
    
    dir_unknown = 4
    
  } TDir;
  
  typedef struct TCell_
  {
    unsigned short  x;
    unsigned short  y;
    unsigned short  pos;
    TDir            dir;
  
  } TCell, *PCell;
  
  
  
  typedef struct TRaster_
  {
    PCell   cells;
    PCell   cursor;
    PCell   cell_limit;
    int     max_cells;
    int     num_cells;
  
    TScan   min_ex, max_ex;
    TScan   min_ey, max_ey;
    TPos    min_x,  min_y;
    TPos    max_x,  max_y;
  
    TScan   ex, ey;
    TScan   cx, cy;
    TPos    x,  y;
  
    PCell   contour_cell;  /* first contour cell */
  
    char    joint;
    char    horizontal;
    TDir    dir;
    PCell   last;
    
    FT_Vector  starter;
    FT_Vector* start;
  
    int     error;
  
    FT_Vector   bez_stack[32*3];
    int         lev_stack[32];
  
    FT_Outline  outline;
    FT_Bitmap   target;
  
    FT_GraySpan gray_spans[ FT_MAX_GRAY_SPANS ];
    int         num_gray_spans;
  
    FT_GraySpan_Func  render_span;
    void*             render_span_closure;
    int               span_y;
  
  } TRaster, *PRaster;
  
    extern
    int  grays2_raster_render( TRaster*     raster,
                               FT_Outline*  outline,
                               FT_Bitmap*   target_map );
  
    extern
    int  grays2_raster_init( FT_Raster    raster,
                             const char*  pool_base,
                             long         pool_size );
  
  #endif
  

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