www.pudn.com > UCGUI390a.rar > GUIAAPoly.c

/* 
********************************************************************************************************* 
*                                                uC/GUI 
*                        Universal graphic software for embedded applications 
* 
*                       (c) Copyright 2002, Micrium Inc., Weston, FL 
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH 
* 
*              µC/GUI is protected by international copyright laws. Knowledge of the 
*              source code may not be used to write a similar product. This file may 
*              only be used in accordance with a license and should not be redistributed 
*              in any way. We appreciate your understanding and fairness. 
* 
---------------------------------------------------------------------- 
File        : GUIPolyAA.C 
Purpose     : Draw Polygon routines with Antialiasing 
---------------------------END-OF-HEADER------------------------------ 
*/ 
 
#include "GUI_Private.h" 
 
#include  
#include  
#include  
 
#if GUI_SUPPORT_AA 
 
/********************************************************************* 
* 
*       Static code 
* 
********************************************************************** 
*/ 
/********************************************************************* 
* 
*       _FillPolygonAA 
*/ 
static void _FillPolygonAA(GUI_POINT* paPoint, int NumPoints, int x, int y) { 
  int i; 
  int Stat; 
  int x0,x1; 
  int PosFactor = GUI_Context.AA_HiResEnable ? 1 : GUI_Context.AA_Factor; 
/* Calc horizontal limits and init GUI_AA */ 
  x0 = x1 = paPoint[0].x; 
  for (i=1; i< NumPoints; i++) { 
    int x =  paPoint[i].x; 
    if (xx1) 
      x1 = x; 
  } 
  if (!GUI_Context.AA_HiResEnable) { 
    Stat = GUI_AA_Init(x0+x,x1+x); 
  } else { 
    Stat = GUI_AA_Init((x0+x)/GUI_Context.AA_Factor,(x1+x)/GUI_Context.AA_Factor); 
  } 
  if (Stat ==0) { 
    /* Modify pointlist */ 
    if (!GUI_Context.AA_HiResEnable) { 
      for (i=0; i< NumPoints; i++) { 
        paPoint[i].x *= GUI_Context.AA_Factor; 
        paPoint[i].y *= GUI_Context.AA_Factor; 
      } 
    } 
    GL_FillPolygon(paPoint, NumPoints, x * PosFactor, y * PosFactor); 
    /* Restore pointlist */ 
    if (!GUI_Context.AA_HiResEnable) { 
      for (i=0; i< NumPoints; i++) { 
        paPoint[i].x /= GUI_Context.AA_Factor; 
        paPoint[i].y /= GUI_Context.AA_Factor; 
      } 
    } 
    /* Cleanup */ 
  } 
  GUI_AA_Exit(); 
} 
 
/********************************************************************* 
* 
*       Public code 
* 
********************************************************************** 
*/ 
/********************************************************************* 
* 
*       GUI_AA_FillPolygon 
*/ 
void GUI_AA_FillPolygon(/*const*/ GUI_POINT* pPoints, int NumPoints, int x0, int y0) { 
  GUI_LOCK(); 
  #if (GUI_WINSUPPORT) 
    WM_ADDORG_AA(x0,y0); 
    WM_ITERATE_START(NULL); { 
  #endif 
/* Variables in MEMDEV module (with memory devices only) */ 
  #if GUI_SUPPORT_MEMDEV 
    if (GUI_Context.pDeviceAPI->pfFillPolygonAA) 
      GUI_Context.pDeviceAPI->pfFillPolygonAA(pPoints, NumPoints, x0, y0); 
    else 
  #endif 
  _FillPolygonAA (pPoints, NumPoints, x0, y0); 
  #if (GUI_WINSUPPORT) 
    } WM_ITERATE_END(); 
  #endif 
  GUI_UNLOCK(); 
} 
 
#else                            /* Avoid problems with empty object modules */ 
  void GUIAAPoly_C(void); 
  void GUIAAPoly_C(void) {} 
#endif /* GUI_SUPPORT_AA */ 
 
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