LCDGetP.c
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上传日期：2017-08-10
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- /*********************************************************************
- * SEGGER MICROCONTROLLER SYSTEME GmbH *
- * Solutions for real time microcontroller applications *
- **********************************************************************
- * *
- * (c) 2002 SEGGER Microcontroller Systeme GmbH *
- * *
- * Internet: www.segger.com Support: support@segger.com *
- * *
- **********************************************************************
- **** emWin/GSC Grafical user interface for embedded applications ****
- emWin 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 re-
- distributed in any way. We appreciate your understanding and fairness.
- ----------------------------------------------------------------------
- File : LCDGetP.c
- Purpose : Get Pixel routines
- Note: These routines are in a module of their own
- because they are mostly not required to link
- ---------------------------END-OF-HEADER------------------------------
- */
- #include <stddef.h> /* needed for definition of NULL */
- #include "GUI_Private.h"
- #include "GUIDebug.h"
- /*********************************************************************
- *
- * LCD_GetPixelIndex
- *
- **********************************************************************
- Note: We can not use the standard clipping which we use for drawing
- operations as it is perfectly legal to read pixels outside of
- the clipping area. We therefor get the bounding rectangle of the
- device and use it for clipping.
- */
- unsigned LCD_GetPixelIndex(int x, int y) {
- LCD_RECT r;
- LCDDEV_L0_GetRect(&r);
- if (x < r.x0)
- return 0;
- if (x > r.x1)
- return 0;
- if (y < r.y0)
- return 0;
- if (y > r.y1)
- return 0;
- return LCDDEV_L0_GetPixelIndex(x,y);
- }
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