guidev_auto.c

来自「TFT LCD（240*320」· C语言 代码 · 共 101 行

/*********************************************************************
*                SEGGER MICROCONTROLLER SYSTEME GmbH                 *
*        Solutions for real time microcontroller applications        *
**********************************************************************
*                                                                    *
*        (c) 1996 - 2004  SEGGER Microcontroller Systeme GmbH        *
*                                                                    *
*        Internet: www.segger.com    Support:  [e-mail]    *
*                                                                    *
**********************************************************************

***** emWin - Graphical 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        : GUIDEV_Auto.c
Purpose     : Implementation of automatic banding memory devices
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Protected.h"
#include "GUIDebug.h"

/* Memory device capabilities are compiled only if support for them is enabled. */ 

#if GUI_SUPPORT_MEMDEV

/*********************************************************************
*
*       public code
*
**********************************************************************
*/
/*********************************************************************
*
*       GUI_MEMDEV_CreateAuto
*/
int GUI_MEMDEV_CreateAuto(GUI_AUTODEV* pAutoDev) {
  pAutoDev->FirstCall = 1;
  return 0;
}

/*********************************************************************
*
*       GUI_MEMDEV_DeleteAuto
*/
void GUI_MEMDEV_DeleteAuto(GUI_AUTODEV* pAutoDev) {
  GUI_USE_PARA(pAutoDev);
}

/*********************************************************************
*
*       GUI_MEMDEV_DrawAuto
*/
int GUI_MEMDEV_DrawAuto(GUI_AUTODEV* pAutoDev, GUI_AUTODEV_INFO* pAutoDevInfo, GUI_CALLBACK_VOID_P* pfDraw, void* pData) {
  GUI_RECT rTemp;
  GUI_HMEM hMem = GUI_MEASDEV_Create();
  if (!hMem) {
    return 1;
  }
  GUI_MEASDEV_Select(hMem);
  /* Measure area to draw */
  if (pAutoDev->FirstCall) {
    /* Measure complete area */
    pAutoDevInfo->DrawFixed = 1;
    pfDraw(pData);
    GUI_MEASDEV_GetRect(hMem, &pAutoDev->rView);
    /* Measure variable area only */
    GUI_MEASDEV_ClearRect(hMem);
    pAutoDevInfo->DrawFixed = 0;
    pfDraw(pData);
    GUI_MEASDEV_GetRect(hMem, &pAutoDev->rPrev);
  } else {
    /* Measure variable area only */
    pfDraw(pData);
    GUI_MEASDEV_GetRect(hMem, &pAutoDev->rView);
    rTemp = pAutoDev->rView;
    GUI_MergeRect(&pAutoDev->rView, &pAutoDev->rView, &pAutoDev->rPrev);
    pAutoDev->rPrev = rTemp;
  }
  GUI_MEASDEV_Delete(hMem);
  /* Do the actual drawing */
  pAutoDevInfo->DrawFixed = 1;
  if (GUI_MEMDEV_Draw(&pAutoDev->rView, pfDraw, pData, 0, GUI_MEMDEV_NOTRANS)) {
    return 1;
  }
  pAutoDevInfo->DrawFixed = 0;
  pAutoDev->FirstCall = 0;
  return 0;
}

#else

void GUIDEV_Auto(void) {} /* avoid empty object files */

#endif /* GUI_SUPPORT_MEMDEV */

/*************************** end of file ****************************/