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C++ ZStreamW::WriteUInt16LE方法代码示例

本文整理汇总了C++中ZStreamW::WriteUInt16LE方法的典型用法代码示例。如果您正苦于以下问题:C++ ZStreamW::WriteUInt16LE方法的具体用法?C++ ZStreamW::WriteUInt16LE怎么用?C++ ZStreamW::WriteUInt16LE使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在ZStreamW的用法示例。


在下文中一共展示了ZStreamW::WriteUInt16LE方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: Imp_Write

void ZDCPixmapEncoder_GIF::Imp_Write(const ZStreamW& iStream,
	const void* iBaseAddress,
	const ZDCPixmapNS::RasterDesc& iRasterDesc,
	const ZDCPixmapNS::PixelDesc& iPixelDesc,
	const ZRect& iBounds)
	{
	ZRef<ZDCPixmapNS::PixelDescRep_Indexed> thePixelDescRep_Indexed
		= ZRefDynamicCast<ZDCPixmapNS::PixelDescRep_Indexed>(iPixelDesc.GetRep());
	ZAssertStop(2, thePixelDescRep_Indexed);

	if (fTransparent)
		iStream.WriteString("GIF89a");
	else
		iStream.WriteString("GIF87a");
	iStream.WriteUInt16LE(iBounds.Width());
	iStream.WriteUInt16LE(iBounds.Height());

	uint8 globalStrmFlags = 0;
	globalStrmFlags |= 0x80; // hasGlobalColorTable
	globalStrmFlags |= 0x70; // colorResolution (8 bits per component)
	// globalStrmFlags |= 0x08; // set this if the color table is sorted in priority order

	ZAssertStop(2, iRasterDesc.fPixvalDesc.fDepth > 0 && iRasterDesc.fPixvalDesc.fDepth <= 8);
	
	globalStrmFlags |= iRasterDesc.fPixvalDesc.fDepth - 1; // globalColorTableSize & depth
	iStream.WriteUInt8(globalStrmFlags);

	iStream.WriteUInt8(0); // backgroundColorIndex
	iStream.WriteUInt8(0); // Pixel aspect ratio -- 0 == none specified.

	const ZRGBColorPOD* theColors;
	size_t theColorsCount;
	thePixelDescRep_Indexed->GetColors(theColors, theColorsCount);
	sWriteColorTable(iStream, theColors, theColorsCount, 1 << iRasterDesc.fPixvalDesc.fDepth);

	if (fTransparent)
		{
		iStream.WriteUInt8('!'); // Extension block
		iStream.WriteUInt8(0xF9); // Graphic Control Extension
		iStream.WriteUInt8(4); // Block size
		// The next byte encodes four fields:
		// 3 bits, Reserved == 0
		// 3 bits, Disposal Method == none (0),
		// 1 bit, User Input Flag == none (0)
		// 1 bit, Transparent Color Flag = yes (1)
		iStream.WriteUInt8(1);
		iStream.WriteUInt16LE(0); // Delay time
		iStream.WriteUInt8(fTransparentPixval);
		iStream.WriteUInt8(0); // Block terminator
		}

	iStream.WriteUInt8(','); // Start of image
	iStream.WriteUInt16LE(0); // Origin h
	iStream.WriteUInt16LE(0); // Origin v
	iStream.WriteUInt16LE(iBounds.Width());
	iStream.WriteUInt16LE(iBounds.Height());

	uint8 localStrmFlags = 0;
//	localStrmFlags |= 0x80; // hasLocalColorTable
	if (fInterlace)
		localStrmFlags |= 0x40; // interlaced
//	localStrmFlags |= 0x20; // sorted
//	localStrmFlags |= 0x70; // localColorTableSize
	iStream.WriteUInt8(localStrmFlags);

	iStream.WriteUInt8(iRasterDesc.fPixvalDesc.fDepth); // Initial code size.

	{ // Scope theSC.
	StreamW_Chunk theSC(iStream);

	ZStreamW_LZWEncode* theSLZW = nil;
	ZStreamW_LZWEncodeNoPatent* theSLZWNP = nil;

	ZStreamW* theStream;
	if (fNoPatent)
		{
		theSLZWNP = new ZStreamW_LZWEncodeNoPatent(iRasterDesc.fPixvalDesc.fDepth, theSC);
		theStream = theSLZWNP;
		}
	else
		{
		theSLZW = new ZStreamW_LZWEncode(iRasterDesc.fPixvalDesc.fDepth, theSC);
		theStream = theSLZW;
		}

	ZDCPixmapNS::PixvalDesc destPixvalDesc(8, true);

	vector<uint8> theRowBufferVector(iBounds.Width());
	void* theRowBuffer = &theRowBufferVector[0];

	try
		{
		if (fInterlace)
			{
			for (int pass = 0; pass < 4; ++pass)
				{
				for (ZCoord currentY = iBounds.top + sInterlaceStart[pass];
					currentY < iBounds.bottom; currentY += sInterlaceIncrement[pass])
					{
					const void* sourceRowAddress
//.........这里部分代码省略.........
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