lcd_drawbitmap_m565.c

MCB2300_ucgui_LCD320240.rar LPC2368的uc/gui的移植

/*
*********************************************************************************************************
*   											 uC/GUI
*   					 Universal graphic software for embedded applications
*
*   					(c) Copyright 2002, Micrium Inc., Weston, FL
*   					(c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*   		   礐/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		: LCD_DrawBitmap_M565.c
Purpose 	: Drawing routine for drawing a 16bpp bitmap
---------------------------END-OF-HEADER------------------------------
*/

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

/*********************************************************************
*
*   	Static code
*
**********************************************************************
*/
/*********************************************************************
*
*   	_DrawBitmap_M565
*/
static void _DrawBitmap_M565(int x0, int y0, int xsize, int ysize, const U8 GUI_UNI_PTR *pPixel, const LCD_LOGPALETTE GUI_UNI_PTR *pLogPal, int xMag, int yMag)
{
	const U16 * pData;
	int y, OldIndex, PrevIndex, Mode, SwapRB, Mag, BytesPerLine, UseDrawBitmap = 0;
	GUI_USE_PARA(pLogPal);
	OldIndex = LCD_GetColorIndex();
	PrevIndex = OldIndex;
	pData = (const U16 *) pPixel;
	Mode = LCD_GetFixedPaletteEx(GUI_Context.SelLayer);
	SwapRB = LCD_GetSwapRBEx(GUI_Context.SelLayer);
	Mag = (xMag | yMag);
	BytesPerLine = xsize * 2;
#if GUI_SUPPORT_MEMDEV == 0
	if ((Mode == 565) && (SwapRB == 1) && (Mag == 1))
	{
		UseDrawBitmap = 1;
	}
#else
	if (GUI_Context.pDeviceAPI->pMemDevAPI)
	{
		if (((GUI_Context.hDevData && (GUI_Context.pDeviceAPI->pMemDevAPI->pfIndex2Color == LCD_Index2Color_565)) || ((GUI_Context.hDevData == 0) && (Mode == 565) && (SwapRB == 1))) && (Mag == 1))
		{
			UseDrawBitmap = 1;
		}
	}
#endif
	if (UseDrawBitmap)
	{
		LCD_DrawBitmap(x0, y0, xsize, ysize, 1, 1, 16, BytesPerLine, pPixel, 0);
	}
	else
	{
		if (Mag == 1)
		{
			/* Perform clipping */
			int x1, y1, Diff;
			y1 = y0 + ysize - 1;
			x1 = x0 + xsize - 1;
			/* Clip Y */
			if (y0 < GUI_Context.ClipRect.y0)
			{
				Diff = GUI_Context.ClipRect.y0 - y0;
				y0 = GUI_Context.ClipRect.y0;
#if GUI_SUPPORT_LARGE_BITMAPS   					/* Required only for 16 bit CPUs if some bitmaps are >64kByte */
				pData += (U32) Diff * (U32) BytesPerLine / 2;
#else
				pData += (unsigned) Diff * (unsigned) BytesPerLine / 2;
#endif
				ysize -= Diff;
			}
			Diff = y1 - GUI_Context.ClipRect.y1;
			if (Diff > 0)
			{
				ysize -= Diff;
			}
			if (ysize <= 0)
			{
				return;
			}
			/* Clip right side */
			Diff = x1 - GUI_Context.ClipRect.x1;
			if (Diff > 0)
			{
				xsize -= Diff;
			}
			/* Clip left side */
			Diff = 0;
			if (x0 < GUI_Context.ClipRect.x0)
			{
				Diff = GUI_Context.ClipRect.x0 - x0;
				xsize -= Diff;
				pData += Diff; 
				x0 += Diff;
			}
			if (xsize <= 0)
			{
				return;
			}
			/* Simple, unmagnified output using LCD_L0_SetPixel() */
			for (y = 0; y < ysize; y++)
			{
				int x;
				const U16 * p = pData;
				for (x = 0; x < xsize; x++)
				{
					U16 Index;
					Index = *p++;
					if (Index != PrevIndex)
					{
						LCD_SetColor(LCD_Index2Color_M565(Index));
						PrevIndex = Index;
					}
					LCDDEV_L0_SetPixelIndex(x + x0, y + y0, LCD_COLORINDEX);
				}
				pData += BytesPerLine / 2;
			}
		}
		else
		{
			/* Magnified output using LCD_FillRect() */
			int x,y;
			int yi;
			for (y = y0, yi = 0; yi < ysize; yi++, y += yMag, pPixel += BytesPerLine)
			{
				int yMax;
				yMax = y + yMag - 1;
				/* Draw if within clip area */
				if ((yMax >= GUI_Context.ClipRect.y0) && (y <= GUI_Context.ClipRect.y1))
				{
					int xi;
					const U16 GUI_UNI_PTR * p = pData;
					for (x = x0, xi = 0; xi < xsize; xi++, x += xMag)
					{
						U16 Index;
						Index = *p++;
						if (Index != PrevIndex)
						{
							LCD_SetColor(LCD_Index2Color_M565(Index));
							PrevIndex = Index;
						}
						LCD_FillRect(x, y, x + xMag - 1, yMax);
					}
				}
				pData += BytesPerLine / 2;
			}
		}
		GUI_SetColorIndex(OldIndex);
	}
}

/*********************************************************************
*
*   	Public data
*
**********************************************************************
*/
/*********************************************************************
*
*   	GUI_BitmapMethodsM565
*/
const GUI_BITMAP_METHODS GUI_BitmapMethodsM565 = {
_DrawBitmap_M565,
LCD_Index2Color_M565
};

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