tft_api.c

用OV7720制作摄像头的详细电路原理图

//=============================================================
//语法格式：	short TFT_GetChineseFont(STR_WINDOW *Window, STR_FONT *FontInfo);
//实现功能：	获取当前使用的中文字库信息
//参数：		Window - 工作窗口指针
//				FontInfo - 字库信息结构体地址
//返回值：		字库序号
//=============================================================
FONT TFT_GetChineseFont(WIN_HANDLE Handle, STR_FONT *FontInfo)
{
	STR_WINDOW *Window = g_WinList + Handle;

	if((Handle < 0) || (Handle >= MAX_WINDOW) || (Window->Flag == 0))
		return -1;
	FontInfo->CharWidth = 0;
	FontInfo->CharHeight = 0;
	FontInfo->FontBuf = FONT_UNUSE_FLAG;
	TFT_GetAsciiFontInfo(Window->ChineseFont, FontInfo);
	return Window->ChineseFont;
}

//=============================================================
//语法格式：	void TFT_SetAsciiFont(STR_WINDOW *Window, short FontType);
//实现功能：	设置当前使用的ASCII字库
//参数：		Window - 工作窗口指针
//				FontType - 字库序号(0~n)
//返回值：		无
//=============================================================
void TFT_SetAsciiFont(WIN_HANDLE Handle, FONT FontID)
{
	STR_WINDOW *Window = g_WinList + Handle;
	if((Handle < 0) || (Handle >= MAX_WINDOW) || (Window->Flag == 0))
		return;
	Window->AsciiFont = FontID;
}

//=============================================================
//语法格式：	short TFT_GetAsciiFont(STR_WINDOW *Window, STR_FONT *FontInfo);
//实现功能：	获取当前使用的ASCII字库信息
//参数：		Window - 工作窗口指针
//				FontInfo - 字库信息结构体地址
//返回值：		字库序号
//=============================================================
FONT TFT_GetAsciiFont(WIN_HANDLE Handle, STR_FONT *FontInfo)
{
	STR_WINDOW *Window = g_WinList + Handle;
	if((Handle < 0) || (Handle >= MAX_WINDOW) || (Window->Flag == 0))
		return -1;
	FontInfo->CharWidth = 0;
	FontInfo->CharHeight = 0;
	FontInfo->FontBuf = FONT_UNUSE_FLAG;
	TFT_GetChineseFontInfo(Window->ChineseFont, FontInfo);
	return Window->ChineseFont;
}

//=============================================================
//语法格式：	void TFT_PutChar(STR_WINDOW *Window, unsigned short CharCode);
//实现功能：	显示一个字符或汉字
//参数：		Window - 工作窗口指针
//				CharCode - 字库或汉字的编码
//返回值：		无
//=============================================================
void TFT_PutChar(WIN_HANDLE Handle, unsigned short CharCode)
{
	STR_WINDOW *Window = g_WinList + Handle;
	STR_FONT Font_Char;
	short i, j, Temp;
	unsigned short *pDispBuf;
	unsigned char *pCharBuf;
	unsigned char Mask;
	short W, H;

	if((Handle < 0) || (Handle >= MAX_WINDOW) || (Window->Flag == 0))
		return;

	TFT_GetWorkBufSize(&W, &H);
	TFT_CallBack_GetCharBuf(Window, CharCode, &Font_Char);			// 获得字模数据
	for(i=0; i<Font_Char.CharHeight; i++)
	{
		Temp = Window->TLy + Window->CurTextY + i;
		if(Window->CurTextY + i < 0 || Temp < 0 || Temp > Window->BRy)
			continue;
		pDispBuf = TFT_SelWorkBuf(-1) + Temp * W + Window->TLx + Window->CurTextX;
		pCharBuf = Font_Char.FontBuf + i * ((Font_Char.CharWidth+7)>>3);
		Mask = 0x80;
		
		for(j=0; j<Font_Char.CharWidth; j++)
		{
			Temp = Window->TLx + Window->CurTextX + j;
			if(Window->CurTextX+j>=0 && Temp>=0 && Temp<=Window->BRx)
			{
				if(*pCharBuf & Mask)
				{
					if(Window->Transparency==0)
						*(pDispBuf+j) = Window->FGColor;
					else
						*(pDispBuf+j) = TFT_CalcTransparent(Window, *(pDispBuf+j), Window->FGColor);
				}
				else if(Window->BGColor!=COLOR_BLACK)
				{
					if(Window->Transparency==0)
						*(pDispBuf+j) = Window->BGColor;
					else
						*(pDispBuf+j) = TFT_CalcTransparent(Window, *(pDispBuf+j), Window->BGColor);
				}
			}
			Mask >>= 1;
			if(Mask==0x00)
			{
				Mask = 0x80;
				pCharBuf++;
			}
		}
	}
}

//=============================================================
//语法格式：	void TFT_PutString(STR_WINDOW *Window, unsigned char *CharBuf);
//实现功能：	显示字符串
//参数：		Window - 工作窗口指针
//				CharBuf - 字符串的起始地址
//返回值：		无
//=============================================================
void TFT_PutString(WIN_HANDLE Handle, char *CharBuf)
{
	STR_WINDOW *Window = g_WinList + Handle;
	unsigned char *pCharBuf = (unsigned char *)CharBuf;
	unsigned short CharCode;
	STR_FONT AsciiFont_Char;
	STR_FONT ChineseFont_Char;
	
	if((Handle < 0) || (Handle >= MAX_WINDOW) || (Window->Flag == 0))
		return;

	if( (TFT_GetAsciiFontInfo(Window->AsciiFont, &AsciiFont_Char) == 0) || 
		(TFT_GetChineseFontInfo(Window->ChineseFont, &ChineseFont_Char) == 0))
		return;

	while((CharCode = *pCharBuf++)!='\0')
	{
		if(CharCode>=0x80)									// 汉字
		{
			if(Window->CurTextX+Window->TLx+ChineseFont_Char.CharWidth > (Window->BRx + 1))
			{
				Window->CurTextX = 0;
				Window->CurTextY += ChineseFont_Char.CharHeight;
				if(Window->CurTextY>Window->BRy)break;
			}
			CharCode |= *(pCharBuf++) << 8;
			TFT_PutChar(Handle, CharCode);
			Window->CurTextX += ChineseFont_Char.CharWidth;
		}
		else if(CharCode==0x0D)								// 回车
		{
			Window->CurTextX = 0;
			Window->CurTextY += ChineseFont_Char.CharHeight;
			if(Window->CurTextY>Window->BRy) break;
			if(*pCharBuf==0x0A) pCharBuf++;
		}
		else if(CharCode==0x0A)								// 回车
		{
			Window->CurTextX = 0;
			Window->CurTextY += ChineseFont_Char.CharHeight;
			if(Window->CurTextY>Window->BRy) break;
			if(*pCharBuf==0x0D) pCharBuf++;
		}
		else												// 字符
		{
			if(Window->CurTextX+Window->TLx+AsciiFont_Char.CharWidth > (Window->BRx + 1))
			{
				Window->CurTextX = 0;
				Window->CurTextY += AsciiFont_Char.CharHeight;
				if(Window->CurTextY>Window->BRy) break;
			}
			TFT_PutChar(Handle, CharCode);
			Window->CurTextX += AsciiFont_Char.CharWidth;
		}
	}
}

//=============================================================
//语法格式：	void TFT_Print(STR_WINDOW *Window, unsigned char *format, ...);
//实现功能：	根据指定格式打印字符串
//参数：		Window - 工作窗口指针
//				format - 格式化字符串
//返回值：		无
//=============================================================
char linebuf[256];
void TFT_Print(WIN_HANDLE Handle, const char *format, ...)
{
	va_list ap;
	va_start(ap, format);

	vsprintf(linebuf, format, ap);
	va_end(ap);
	linebuf[255] = 0;
	TFT_PutString(Handle, linebuf);
}

//=============================================================
//语法格式：	void TFT_PutImage(WIN_HANDLE Handle, short x, short y, STR_IMAGE *pImage);
//实现功能：	在工作区中显示位图
//参数：		Handle - 窗口句柄
//				x - 位图的左上角x坐标(相对于工作区)
//				y - 位图的左上角y坐标(相对于工作区)
//				pImage - 存储位图信息的结构体地址
//返回值：		无
//=============================================================
void TFT_PutImage(WIN_HANDLE Handle, short x, short y, STR_IMAGE *pImage)
{
	TFT_PutImageEx(Handle, x, y, pImage->Width, pImage->Height, pImage->ImageBuf);
}

//=============================================================
//语法格式：	void TFT_PutImageEx(WIN_HANDLE Handle, short x, short y, short width, short height, void *pImage)
//实现功能：	在工作区中显示位图
//参数：		Handle - 窗口句柄
//				x - 位图的左上角x坐标(相对于工作区)
//				y - 位图的左上角y坐标(相对于工作区)
//				width - 位图宽度
//				height - 位图高度
//				pImage - 位图数据首地址
//返回值：		无
//=============================================================
void TFT_PutImageEx(WIN_HANDLE Handle, short x, short y, short width, short height, void *pImage)
{
	STR_WINDOW *Window = g_WinList + Handle;
	short W, H;
	short ScrSx, ScrSy, ScrEx, ScrEy;
	short ImgSx, ImgSy, ImgEx, ImgEy;
	short i, j;
	unsigned short *pImgBuf, *pDispBuf;
	
	if((Handle < 0) || (Handle >= MAX_WINDOW) || (Window->Flag == 0))
		return;
	TFT_GetWorkBufSize(&W, &H);

	ScrSx = (x<0) ? Window->TLx : Window->TLx + x;			// 计算实际显示区域
	if(ScrSx<0) ScrSx = 0;
	if(ScrSx>Window->BRx || ScrSx>=W) return;
	ImgSx = ScrSx - Window->TLx - x;
	
	ScrSy = (y<0) ? Window->TLy : Window->TLy + y;
	if(ScrSy<0) ScrSy = 0;
	if(ScrSy>Window->BRy || ScrSx>=H) return;
	ImgSy = ScrSy - Window->TLy - y;
	
	ScrEx = Window->TLx + x + width - 1;
	if(ScrEx > Window->BRx) ScrEx = Window->BRx;
	if(ScrEx >= W) ScrEx = W - 1;
	if(ScrEx<0 || ScrEx<Window->TLx) return;
	ImgEx = ScrEx - Window->TLx - x;
	
	ScrEy = Window->TLy + y + height - 1;
	if(ScrEy > Window->BRy) ScrEy = Window->BRy;
	if(ScrEy >= H) ScrEy = H - 1;
	if(ScrEy<0 || ScrEy<Window->TLy) return;
	ImgEy = ScrEy - Window->TLy - y;

	if(Window->Transparency==0)										// 透明度为0则直接显示
	{
		for(i=ImgSy; i<=ImgEy; i++)
		{
			pImgBuf = (unsigned short*)pImage + i * width;
			pDispBuf = TFT_SelWorkBuf(-1) + ScrSy * W + ScrSx;
			for(j=ImgSx; j<=ImgEx; j++)
			{
				*(pDispBuf++) = *(pImgBuf+j);
			}
			ScrSy++;
		}
	}
	else													// 透明度不为0则计算叠加颜色后显示
	{
		for(i=ImgSy; i<=ImgEy; i++)
		{
			pImgBuf = (unsigned short*)pImage + i * width;
			pDispBuf = TFT_SelWorkBuf(-1) + ScrSy * W + ScrSx;
			for(j=ImgSx; j<=ImgEx; j++)
			{
				*pDispBuf = TFT_CalcTransparent(Window, *pDispBuf, *(pImgBuf+j));
				pDispBuf++;
			}
			ScrSy++;
		}
	}
}

//=============================================================
//语法格式：	void TFT_PutPicture(WIN_HANDLE Handle, short x, short y, unsigned char *pImage, int AutoScale)
//实现功能：	在工作区中显示图像
//参数：		Window - 工作窗口指针
//				x,y - 图像的显示坐标
//				pImage - 位图文件首地址
//				AutoScale - 是否自适应窗口
//返回值：		无
//备注：		自适应窗口用于当图像大于窗口时，并且图像显示的起始不能在窗口之外
//=============================================================
void TFT_PutPicture(WIN_HANDLE Handle, short x, short y, unsigned char *pImage, int AutoScale)
{
	STR_WINDOW *Window = g_WinList + Handle;
	STR_IMAGE Image;
	int Ret = 1;

	if((Handle < 0) || (Handle >= MAX_WINDOW) || (Window->Flag == 0))
		return;

	Image.ImageBuf = (unsigned char *)TFT_DEPRESS_ADDR;
	Ret = TFT_DepressImage(&Image, pImage);
	if(Ret == 0)
	{
		short CurX, CurY;
		TFT_GetTextPos(Handle, &CurX, &CurY);
		TFT_SetTextPos(Handle, x, y);
		TFT_Print(Handle, "不支持的图像格式");
		TFT_SetTextPos(Handle, CurX, CurY);
		return;
	}
	if(AutoScale)
	{
		if((x >= 0) && (y >= 0))
		if((Image.Width > Window->Width - x) || (Image.Height > Window->Height - y))
		{
			float HScale, VScale;
			int ScaleSize;
			HScale = (float)Image.Width / (Window->Width - x);
			VScale = (float)Image.Height / (Window->Height - y);
			if(HScale >= VScale)
			{
				// Scale the image to fit for the width of screen
				ScaleSize = Image.Height / HScale;
				TFT_ScaleImage(	Image.Width, Image.Height,						// Image size before scale
								Window->Width - x, ScaleSize,						// Image size after scale
								(void*)TFT_DEPRESS_ADDR, (void*)TFT_DEPRESS_ADDR,	// Replace the image by scaled one
								0, 0);												// No Reverse
				Image.Width = Window->Width - x;
				Image.Height = ScaleSize;
			}
			else
			{
				// Scale the image to fit for the height of screen
				ScaleSize = Image.Width / VScale;
				TFT_ScaleImage(	Image.Width, Image.Height,						// Image size before scale
								ScaleSize, Window->Height - y,						// Image size after scale
								(void*)TFT_DEPRESS_ADDR, (void*)TFT_DEPRESS_ADDR,	// Replace the image by scaled one
								0, 0);												// No Reverse
				Image.Width = ScaleSize;
				Image.Height = Window->Height - y;
			}
		}
	}
	TFT_PutImage(Handle, x, y, &Image);
}