guidev_reduceysize.c

ucGUI3.90a没有MemDev这是从3.24向上移植的

/*! @file GUIDEV_ReduceYSize.c
 *  Implementation of memory devices, add. module 
 *
 *  @author hiber modified
 *  @author Copyleft (C) 1981-2006, All Rights Givenup
 *  @date 04/18/2006
 *  @version 
 *
 *  @note 
 *  @attention 
 *  @warning 
 *  @bug
 *
 *  @todo
 *  @example <file-name>
 *  @see
 */
#include "GUI_Protected.h"
#include "GUIDebug.h"
#include <string.h>

#if GUI_SUPPORT_MEMDEV

extern void * _GUI_ALLOC_h2p_Lock(GUI_HMEM hMem);
#define GUI_ALLOC_H2P(h)          _GUI_ALLOC_h2p_Lock(h)
#define GUI_ALLOC_FREE(handle)    GUI_ALLOC_Free(handle)
#define GUI_ALLOC_LOCK(handle)    _GUI_ALLOC_h2p_Lock(handle)
#define GUI_ALLOC_UNLOCK(handle)

#ifdef GUI_USAGE_H2P
    #undef GUI_USAGE_H2P
    #define GUI_USAGE_H2P(h) ((GUI_USAGE*)_GUI_ALLOC_h2p_Lock(h)) 
#endif

#ifdef GUI_MEMDEV_H2P
    #undef GUI_MEMDEV_H2P
    #define GUI_MEMDEV_H2P _GUI_ALLOC_h2p_Lock
#endif
//////////////////////////////////////////////////////////////////////////

//! 减小一个存储设备的Y 轴尺寸
//! @param hMem 存储设备的句柄
//! @param YSize 存储设备新的Y 轴尺寸
void GUI_MEMDEV_ReduceYSize(GUI_MEMDEV_Handle hMem, int YSize)
{
    /* Make sure memory handle is valid */
    if (!hMem)
    {
        hMem = GUI_Context.hDevData;
    }

    if (!hMem)
    {
        return ;
    }

    // 大括号...
    {
        GUI_MEMDEV* pDevData = (GUI_MEMDEV*)GUI_ALLOC_LOCK(hMem);
       
        if (YSize < pDevData->YSize)
        {
            pDevData->YSize = YSize;
        }
    }

    GUI_ALLOC_UNLOCK(hMem);
}

#else
        
void GUIDEV_ReduceYSize(void) 
{
    /* avoid empty object files */
} 

#endif /* GUI_MEMDEV_SUPPORT */