Initial

mdiwin/GIF.TPP

@@ -0,0 +1,171 @@
+template <class T>
+GIFDecoder<T>::GIFDecoder(const char *pathFileName)
+: LZWDecompression(pathFileName),
+  mhGlobalPalette(0),	mlpPaletteData(0), mColors(0), mIsInterlaced(0),
+	mBufferCount(0), mPaletteObject(0), mBackgroundObject(0),
+	mImageObject(0), mShowObject(0), mErrorObject(0), mPaletteMethod(0),
+	mBackgroundMethod(0), mImageMethod(0), mShowMethod(0), mErrorMethod(0)
+{
+}
+
+template <class T>
+GIFDecoder<T>::~GIFDecoder()
+{
+	if(mhGlobalPalette)
+	{
+		::GlobalUnlock(mhGlobalPalette);
+		::GlobalFree(mhGlobalPalette);
+  }
+}
+
+template <class T>
+WORD GIFDecoder<T>::unpackImage(void)
+{
+	Index i;
+  int hasProcessed;
+
+	hasProcessed=FALSE;
+	if(!isOpen())return FALSE;
+	if(!getChar())return FALSE;
+	if('G'!=currentChar())return FALSE;
+	for(i=0;i<5;i++)if(!getChar())return FALSE;
+	if(!getWord())return FALSE;
+	mScreenWidth=currentWord();
+	if(!getWord())return FALSE;
+	mScreenHeight=currentWord();
+	if(!getChar())return FALSE;
+	mGlobalFlagByte=currentChar();
+	mColors=1<<((mGlobalFlagByte&0x07)+1);
+	if(!getChar())return FALSE;
+	mBackgroundColor=currentChar();
+	if(!getChar())return FALSE;
+	if(currentChar())return FALSE;
+	if(mGlobalFlagByte&0x80)
+	{
+		if(!readPaletteData())return FALSE;
+		if(mPaletteObject && mPaletteMethod)
+			(mPaletteObject->*mPaletteMethod)(mlpPaletteData,mColors);
+	}
+	while(TRUE)
+	{
+		if(!getChar())break;
+		switch(currentChar())
+		{
+			case '!' :   // extension folows
+				while(getChar() && currentChar()!=',');
+				if(currentChar()!=',')break;
+			case ',' :   // image follows
+				if(hasProcessed)break;
+				hasProcessed=TRUE;
+				if(!processImage())return FALSE;
+				break;
+			case ';' :   // file is completely processed
+				continue;
+			default :
+				return FALSE;
+    }
+	}
+	closeFile();
+	return TRUE;
+}
+
+
+template <class T>
+WORD GIFDecoder<T>::processImage(void)
+{
+	UCHAR localFlagByte;
+
+	if(!getWord())return FALSE;
+	mImageStartLeft=currentWord();
+	if(!getWord())return FALSE;
+	mImageStartTop=currentWord();
+	if(!getWord())return FALSE;
+	mImageWide=currentWord();
+	if(!getWord())return FALSE;
+	mImageDeep=currentWord();
+	if(!getChar())return FALSE;
+	localFlagByte=currentChar();
+	mIsInterlaced=localFlagByte&0x40;
+	mPixelSize=(mGlobalFlagByte&0x07)+1;
+	if(localFlagByte&0x80)
+	{
+		mPixelSize=(localFlagByte&0x07)+1;
+		mColors=1<<((localFlagByte&0x07)+1);
+		if(!readPaletteData())return FALSE;
+		if(mPaletteObject && mPaletteMethod)
+			(mPaletteObject->*mPaletteMethod)(mlpPaletteData,mColors);
+	}
+	if(mBackgroundObject && mBackgroundMethod)
+		(mBackgroundObject->*mBackgroundMethod)(mBackgroundColor);
+	mBufferCount=0;
+	if(!getChar())return FALSE;
+	unpackData(mImageWide,mImageDeep,mIsInterlaced,mPixelSize);
+	if(mImageObject && mImageMethod)
+		(mImageObject->*mImageMethod)();
+	return TRUE;
+}
+
+template <class T>
+WORD GIFDecoder<T>::readPaletteData(void)
+{
+	if(mhGlobalPalette)
+	{
+		::GlobalUnlock(mhGlobalPalette);
+		::GlobalFree(mhGlobalPalette);
+	}
+	mhGlobalPalette=::GlobalAlloc(GMEM_FIXED,mColors*3);
+	if(!mhGlobalPalette)return FALSE;
+	mlpPaletteData=(UCHAR FAR *)::GlobalLock(mhGlobalPalette);
+	for(Index i=0;i<mColors*3;i+=3)
+	{
+		if(!getChar())return FALSE;
+		*(mlpPaletteData+i)=currentChar();
+		if(!getChar())return FALSE;
+		*(mlpPaletteData+i+1)=currentChar();
+		if(!getChar())return FALSE;
+		*(mlpPaletteData+i+2)=currentChar();
+	}
+	return TRUE;
+}
+
+template <class T>
+void GIFDecoder<T>::showHandler(UCHAR FAR *lpOutRow,USHORT yLocation)
+{
+	if(mShowObject && mShowMethod)
+		(mShowObject->*mShowMethod)(mImageWide,mImageDeep,lpOutRow,yLocation);
+}
+
+template <class T>
+void GIFDecoder<T>::setPaletteHandler(T *object,void (T::*method)(const UCHAR FAR *lpPaletteData,USHORT numColors))
+{
+	mPaletteObject=object;
+	mPaletteMethod=method;
+}
+
+template <class T>
+void GIFDecoder<T>::setBackgroundHandler(T *object,void (T::*method)(USHORT backgroundColor))
+{
+	mBackgroundObject=object;
+	mBackgroundMethod=method;
+}
+
+template <class T>
+void GIFDecoder<T>::setImageHandler(T *object,void (T::*method)(void))
+{
+	mImageObject=object;
+	mImageMethod=method;
+}
+
+template <class T>
+void GIFDecoder<T>::setShowHandler(T *object,void (T::*method)(USHORT imageWide,USHORT imageDeep,const UCHAR FAR *lpRowData,USHORT yLocation))
+{
+	mShowObject=object;
+	mShowMethod=method;
+}
+
+template <class T>
+void GIFDecoder<T>::setErrorHandler(T *object,void (T::*method)(const char FAR *message))
+{
+	mErrorObject=object;
+	mErrorMethod=method;
+}