reactos/include/win32k/float.h

   1 #ifndef __WIN32K_FLOAT_H
   2 #define __WIN32K_FLOAT_H
   3
   4 #include <win32k/math.h>
   5 #include <win32k/dc.h>
   6 #include <ft2build.h>
   7 #include FT_FREETYPE_H
   8
   9 typedef struct tagFLOAT_POINT
  10 {
  11    FLOAT x, y;
  12 } FLOAT_POINT;
  13
  14 /* Rounds a floating point number to integer. The world-to-viewport
  15  * transformation process is done in floating point internally. This function
  16  * is then used to round these coordinates to integer values.
  17  */
  18 static __inline INT GDI_ROUND(FLOAT val)
  19 {
  20    return (int)floor(val + 0.5);
  21 }
  22
  23 /* Performs a world-to-viewport transformation on the specified point (which
  24  * is in floating point format).
  25  */
  26 static __inline void INTERNAL_LPTODP_FLOAT(DC *dc, FLOAT_POINT *point)
  27 {
  28     FLOAT x, y;
  29
  30     /* Perform the transformation */
  31     x = point->x;
  32     y = point->y;
  33     point->x = x * dc->w.xformWorld2Vport.eM11 +
  34                y * dc->w.xformWorld2Vport.eM21 +
  35                dc->w.xformWorld2Vport.eDx;
  36     point->y = x * dc->w.xformWorld2Vport.eM12 +
  37                y * dc->w.xformWorld2Vport.eM22 +
  38                dc->w.xformWorld2Vport.eDy;
  39 }
  40
  41 /* Performs a viewport-to-world transformation on the specified point (which
  42  * is in integer format). Returns TRUE if successful, else FALSE.
  43  */
  44 #if 0
  45 static __inline BOOL INTERNAL_DPTOLP(DC *dc, LPPOINT point)
  46 {
  47     FLOAT_POINT floatPoint;
  48
  49     /* Perform operation with floating point */
  50     floatPoint.x=(FLOAT)point->x;
  51     floatPoint.y=(FLOAT)point->y;
  52     if (!INTERNAL_DPTOLP_FLOAT(dc, &floatPoint))
  53         return FALSE;
  54
  55     /* Round to integers */
  56     point->x = GDI_ROUND(floatPoint.x);
  57     point->y = GDI_ROUND(floatPoint.y);
  58
  59     return TRUE;
  60 }
  61
  62 /* Performs a world-to-viewport transformation on the specified point (which
  63  * is in integer format).
  64  */
  65 static __inline void INTERNAL_LPTODP(DC *dc, LPPOINT point)
  66 {
  67     FLOAT_POINT floatPoint;
  68
  69     /* Perform operation with floating point */
  70     floatPoint.x=(FLOAT)point->x;
  71     floatPoint.y=(FLOAT)point->y;
  72     INTERNAL_LPTODP_FLOAT(dc, &floatPoint);
  73
  74     /* Round to integers */
  75     point->x = GDI_ROUND(floatPoint.x);
  76     point->y = GDI_ROUND(floatPoint.y);
  77 }
  78
  79 #endif
  80
  81 #define MulDiv( x, y, z ) EngMulDiv( x, y, z )
  82
  83 #define XDPTOLP(dc,x) \
  84     (MulDiv(((x)-(dc)->vportOrgX), (dc)->wndExtX, (dc)->vportExtX) + (dc)->wndOrgX)
  85 #define YDPTOLP(dc,y) \
  86     (MulDiv(((y)-(dc)->vportOrgY), (dc)->wndExtY, (dc)->vportExtY) + (dc)->wndOrgY)
  87 #define XLPTODP(dc,x) \
  88     (MulDiv(((x)-(dc)->wndOrgX), (dc)->vportExtX, (dc)->wndExtX) + (dc)->vportOrgX)
  89 #define YLPTODP(dc,y) \
  90     (MulDiv(((y)-(dc)->wndOrgY), (dc)->vportExtY, (dc)->wndExtY) + (dc)->vportOrgY)
  91
  92   /* Device <-> logical size conversion */
  93
  94 #define XDSTOLS(dc,x) \
  95     MulDiv((x), (dc)->wndExtX, (dc)->vportExtX)
  96 #define YDSTOLS(dc,y) \
  97     MulDiv((y), (dc)->wndExtY, (dc)->vportExtY)
  98 #define XLSTODS(dc,x) \
  99     MulDiv((x), (dc)->vportExtX, (dc)->wndExtX)
 100 #define YLSTODS(dc,y) \
 101     MulDiv((y), (dc)->vportExtY, (dc)->wndExtY)
 102
 103 #endif