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