/*************************************************************************************************************
                                                   uC/GUI
                                               嵌入式通用圖形軟件

File        : GUICore.C
Purpose     : Core file for emWin GSC
************************************************************************************************************/
#include <stddef.h>           /* needed for definition of NULL */

#define  GL_CORE_C
#include "GUI_Private.H"
#include "GUIDebug.h"

/*************************************************************************************************************
* GUI_ClearRect--
*************************************************************************************************************/
void GUI_ClearRect(int x0, int y0, int x1, int y1) 
{
  GUI_DRAWMODE PrevDraw;
  
  GUI_LOCK();
  PrevDraw = LCD_SetDrawMode(GUI_DRAWMODE_REV);
  #if GUI_WINSUPPORT
    WM_ADDORG(x0,y0);
    WM_ADDORG(x1,y1);
    WM_ITERATE_START(NULL) 
    {
  #endif
  LCD_FillRect(x0,y0,x1,y1);
  #if GUI_WINSUPPORT
    } WM_ITERATE_END();
  #endif
  LCD_SetDrawMode(PrevDraw);
  GUI_UNLOCK();
}


/*************************************************************************************************************
* GUI_Clear--
*************************************************************************************************************/
void GUI_Clear(void) 
{
  GUI_GotoXY(0,0);     /* Reset text cursor to upper left */
  GUI_ClearRect(GUI_XMIN, GUI_YMIN, GUI_XMAX, GUI_YMAX);
}

/*************************************************************************************************************
* GUI_SelectLCD--
*************************************************************************************************************/
#if GUI_SUPPORT_MEMDEV
void GUI_SelectLCD(void) 
{
  int hDevDataOld = GUI_Context.hDevData;
  
  GUI_Context.hDevData = 0;
  GUI_Context.pDeviceAPI   = &LCD_L0_APIList;
  GUI_Context.pClipRect_HL = &GUI_Context.ClipRect;
  LCD_SetClipRectMax();
  /* If we are switching batck, restore the former clip rect */
  if (hDevDataOld)
    GUI_Context.ClipRect = GUI_Context.ClipRectPrev;
  #if GUI_WINSUPPORT
    WM_Activate();
  #endif
}
#endif


/*************************************************************************************************************
* GUI_Init                            
* Init of GUI internal data structures & variables--初始化GUI的內部數據結構和變量
*************************************************************************************************************/
const tLCD_HL_APIList LCD_HL_APIList = 
{
  LCD_DrawHLine,
  LCD_DrawPixel
};

static void _InitContext(GUI_CONTEXT *pContext) 
{
  #if GUI_SUPPORT_MEMDEV
    GUI_SelectLCD();
  #else
    LCD_SetClipRectMax();
  #endif
  
  pContext->pLCD_HL      = &LCD_HL_APIList;
  pContext->pAFont       = GUI_DEFAULT_FONT;
  pContext->pClipRect_HL = &GUI_Context.ClipRect;
  pContext->PenSize      = 1;
  /* Variables in WM module */
  #if GUI_WINSUPPORT
    pContext->hAWin    = WM_GetDesktopWindow();
  #endif
  /* Variables in GUI_AA module */
  pContext->AA_Factor = 3;
  LCD_SetBkColor(GUI_DEFAULT_BKCOLOR);
  LCD_SetColor(GUI_DEFAULT_COLOR);
}

int GUI_Init(void) 
{
  int r;
  
  GUI_DEBUG_LOG("\nGUI_Init()");
  /* Init system wide globals first */
  GUI_DecChar = '.';
  GUI_X_Init();
  /* Init context */
  _InitContext(&GUI_Context);
  GUITASK_INIT();
  r = LCD_Init();
  #if GUI_WINSUPPORT
    WM_Init();
  #endif
  return r;
}