/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              µC/GUI 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 redistributed
*              in any way. We appreciate your understanding and fairness.
*
----------------------------------------------------------------------
File        : GUICore.C
Purpose     : Core routines
---------------------------END-OF-HEADER------------------------------
*/

#include <stddef.h> /* needed for definition of NULL */

#define GL_CORE_C

#include "GUI_Private.h"
#include "GUIDebug.h"

#if GUI_WINSUPPORT
#include "WM_GUI.h"
#include "WM.h"
#endif

/*********************************************************************
 *
 *       Static data
 *
 **********************************************************************
 */
#if GUI_SUPPORT_AA
static const tLCD_HL_APIList _HL_APIList = {
    LCD_DrawHLine,
    LCD_DrawPixel};
#endif

/*********************************************************************
 *
 *       Static code
 *
 **********************************************************************
 */
/*********************************************************************
 *
 *       _InitContext
 *
 * Purpose
 *   Initializes the given context.
 *
 * Special considerations
 *   Make sure that no GUI functions are called, because locking is
 *   not allowed here (GUITASK_INIT not yet called).
 */
static void _InitContext(GUI_CONTEXT *pContext)
{
/* memset(..,0,..) is not required, as this function is called only at startup of the GUI when data is 0 */
#if GUI_SUPPORT_DEVICES
  pContext->pDeviceAPI = LCD_aAPI[0]; /* &LCD_L0_APIList; */
#endif
  pContext->pClipRect_HL = &GUI_Context.ClipRect;
  LCD_L0_GetRect(&pContext->ClipRect);
#if GUI_SUPPORT_AA
  pContext->pLCD_HL = &_HL_APIList;
#endif
  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 */
#if GUI_SUPPORT_AA
  pContext->AA_Factor = 3;
#endif
  pContext->Color = GUI_INVALID_COLOR;
  pContext->BkColor = GUI_INVALID_COLOR;
  LCD_SetBkColor(GUI_DEFAULT_BKCOLOR);
  LCD_SetColor(GUI_DEFAULT_COLOR);
  pContext->pUC_API = &GUI__API_TableNone;
}

/*********************************************************************
 *
 *       Public code
 *
 **********************************************************************
 */
/*********************************************************************
 *
 *       GUI_ClearRect
 */
void GUI_ClearRect(int x0, int y0, int x1, int y1)
{
  GUI_DRAWMODE PrevDraw;
#if GUI_WINSUPPORT
  GUI_RECT r;
#endif
  GUI_LOCK();
  PrevDraw = LCD_SetDrawMode(GUI_DRAWMODE_REV);
#if GUI_WINSUPPORT
  WM_ADDORG(x0, y0);
  WM_ADDORG(x1, y1);
  r.x0 = x0;
  r.x1 = x1;
  r.y0 = y0;
  r.y1 = y1;
  WM_ITERATE_START(&r)
  {
#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_Init
 *
 * Purpose:
 *   Init of GUI internal data structures & variables
 */
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
  GUITASK_COPY_CONTEXT();
#if defined(GUI_TRIAL_VERSION)
  {
    int i;
    for (i = 0; i < 10; i++)
    {
      GUI_DispString("This uC-GUI library\n"
                     "is for evaluation\n"
                     "purpose only.\n"
                     "A license is\n"
                     "required to use\n"
                     "it in a product\n\n"
                     "www.micrium.com\n");
      GUI_GotoXY(0, 0);
    }
  }
  GUI_Clear();
#endif
  return r;
}

/*************************** End of file ****************************/