?? gui_drawgraph.c
字號:
/*************************************************************************************************************
uC/GUI
嵌入式通用圖形軟件
File : GUI_DrawPolyline.c
Purpose : Implementation of GUI_DrawPolyline (part of emWin GSC)
************************************************************************************************************/
#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();
}
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