reactos/subsys/win32k/objects/rect.c

   1 #include <windows.h>
   2 #include <ddk/ntddk.h>
   3 #include <win32k/region.h>
   4 #include <win32k/gdiobj.h>
   5 #include <include/rect.h>
   6
   7 //#define NDEBUG
   8 #include <win32k/debug1.h>
   9
  10 /* FUNCTIONS *****************************************************************/
  11
  12 BOOL
  13 W32kOffsetRect(LPRECT Rect, INT x, INT y)
  14 {
  15   Rect->left += x;
  16   Rect->right += x;
  17   Rect->top += y;
  18   Rect->bottom += y;
  19   return(TRUE);
  20 }
  21
  22
  23 BOOL STDCALL
  24 W32kUnionRect(PRECT Dest, const RECT* Src1, const RECT* Src2)
  25 {
  26   if (W32kIsEmptyRect(Src1))
  27     {
  28       if (W32kIsEmptyRect(Src2))
  29         {
  30           W32kSetEmptyRect(Dest);
  31           return(FALSE);
  32         }
  33       else
  34         {
  35           *Dest = *Src2;
  36         }
  37     }
  38   else
  39     {
  40       if (W32kIsEmptyRect(Src2))
  41         {
  42           *Dest = *Src1;
  43         }
  44       else
  45         {
  46           Dest->left = min(Src1->left, Src2->left);
  47           Dest->top = min(Src1->top, Src2->top);
  48           Dest->right = max(Src1->right, Src2->right);
  49           Dest->bottom = max(Src1->bottom, Src2->bottom);
  50         }
  51     }
  52   return(TRUE);
  53 }
  54
  55 BOOL STDCALL
  56 W32kSetEmptyRect(PRECT Rect)
  57 {
  58   Rect->left = Rect->right = Rect->top = Rect->bottom = 0;
  59   return(TRUE);
  60 }
  61
  62 BOOL STDCALL
  63 W32kIsEmptyRect(PRECT Rect)
  64 {
  65   return(Rect->left >= Rect->right || Rect->top >= Rect->bottom);
  66 }
  67
  68 BOOL STDCALL
  69 W32kSetRect(PRECT Rect, INT left, INT top, INT right, INT bottom)
  70 {
  71   Rect->left = left;
  72   Rect->top = top;
  73   Rect->right = right;
  74   Rect->bottom = bottom;
  75   return(TRUE);
  76 }
  77
  78 BOOL STDCALL
  79 W32kIntersectRect(PRECT Dest, const RECT* Src1, const RECT* Src2)
  80 {
  81   if (W32kIsEmptyRect(Src1) || W32kIsEmptyRect(Src2) ||
  82       Src1->left >= Src2->right || Src2->left >= Src1->right ||
  83       Src1->top >= Src2->bottom || Src2->top >= Src1->bottom)
  84     {
  85       W32kSetEmptyRect(Dest);
  86       return(FALSE);
  87     }
  88   Dest->left = max(Src1->left, Src2->left);
  89   Dest->right = min(Src1->right, Src2->right);
  90   Dest->top = max(Src1->top, Src2->top);
  91   Dest->bottom = min(Src1->right, Src2->right);
  92   return(TRUE);
  93 }