GUI_DrawGraph.c
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上传日期:2017-08-10
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- /*
- *********************************************************************************************************
- * uC/GUI
- * Universal graphic software for embedded applications
- *
- * (c) Copyright 2002, Micrium Inc., Weston, FL
- * (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
- *
- * 礐/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 : GUI_DrawPolyline.c
- Purpose : Implementation of GUI_DrawPolyline (part of emWin GSC)
- ---------------------------END-OF-HEADER------------------------------
- */
- #include <stddef.h> /* needed for definition of NULL */
- #include "GUI_Protected.H"
- static void _DrawGraph(I16 *pay, int NumPoints, int xOff, int yOff) {
- int i;
- int y0, y1;
- int yClip0, yClip1;
- /* Perform high level clipping in x */
- yClip0 = GUI_Context.pClipRect_HL->y0;
- yClip1 = GUI_Context.pClipRect_HL->y1;
- i=0;
- if (GUI_Context.pClipRect_HL) {
- if (xOff < GUI_Context.pClipRect_HL->x0)
- i = GUI_Context.pClipRect_HL->x0 - xOff;
- if (xOff+NumPoints-1 > GUI_Context.pClipRect_HL->x1)
- NumPoints = GUI_Context.pClipRect_HL->x1 - xOff + 1;
- }
- /* Start drawing if there is something left to do after x-clipping */
- if (i < NumPoints) {
- y0 = *(pay + i++) + yOff;
- /* Iterate */
- for (; i < NumPoints; i++) {
- /* Perform high level clipping in y */
- y1 = *(pay + i) + yOff;
- if ((y0 >= yClip0) | (y1 >= yClip0)) {
- if ((y0 <= yClip1) | (y1 <= yClip1)) {
- int y01;
- y01 = (y1 + y0) / 2;
- if (y0 <= y1) {
- LCD_DrawVLine(i + xOff - 1, y0, y01);
- LCD_DrawVLine(i + xOff, y01, y1);
- } else {
- LCD_DrawVLine(i + xOff - 1, y01, y0);
- LCD_DrawVLine(i + xOff, y1, y01);
- }
- }
- }
- y0 = y1;
- }
- }
- }
-
- void GUI_DrawGraph(I16 *pay, int NumPoints, int x0, int y0) {
- GUI_LOCK();
- #if (GUI_WINSUPPORT)
- WM_ADDORG(x0,y0);
- WM_ITERATE_START(NULL); {
- #endif
- _DrawGraph(pay, NumPoints, x0, y0);
- #if (GUI_WINSUPPORT)
- } WM_ITERATE_END();
- #endif
- GUI_UNLOCK();
- }