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C++ MemoryReadStream::readUint16BE方法代码示例

本文整理汇总了C++中common::MemoryReadStream::readUint16BE方法的典型用法代码示例。如果您正苦于以下问题:C++ MemoryReadStream::readUint16BE方法的具体用法?C++ MemoryReadStream::readUint16BE怎么用?C++ MemoryReadStream::readUint16BE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common::MemoryReadStream的用法示例。


在下文中一共展示了MemoryReadStream::readUint16BE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: loadChunked

void PictureResource::loadChunked(byte *source, int size) {
	// Loads a "chunked" picture as used in Manhole EGA

	Common::MemoryReadStream *sourceS = new Common::MemoryReadStream(source, size);

	byte cmdFlags = 0, pixelFlags = 0, maskFlags = 0;
	uint16 cmdOffs = 0, pixelOffs = 0, maskOffs = 0;
	uint16 lineSize = 0, width = 0, height = 0;

	sourceS->skip(36); // skip the "Flex" header

	_hasPalette = false;

	while (!sourceS->eos()) {

		uint32 chunkType = sourceS->readUint32BE();
		uint32 chunkSize = sourceS->readUint32BE();

		if (sourceS->eos())
			break;

		debug(0, "chunkType = %08X; chunkSize = %d", chunkType, chunkSize);

		if (chunkType == MKTAG('R','e','c','t')) {
			debug(0, "Rect");
			sourceS->skip(4);
			height = sourceS->readUint16BE();
			width = sourceS->readUint16BE();
			debug(0, "width = %d; height = %d", width, height);
		} else if (chunkType == MKTAG('f','M','a','p')) {
			debug(0, "fMap");
			lineSize = sourceS->readUint16BE();
			sourceS->skip(11);
			cmdFlags = sourceS->readByte();
			cmdOffs = sourceS->pos();
			sourceS->skip(chunkSize - 14);
			debug(0, "lineSize = %d; cmdFlags = %d; cmdOffs = %04X", lineSize, cmdFlags, cmdOffs);
		} else if (chunkType == MKTAG('f','L','C','o')) {
			debug(0, "fLCo");
			sourceS->skip(9);
			pixelFlags = sourceS->readByte();
			pixelOffs = sourceS->pos();
			sourceS->skip(chunkSize - 10);
			debug(0, "pixelFlags = %d; pixelOffs = %04X", pixelFlags, pixelOffs);
		} else if (chunkType == MKTAG('f','P','i','x')) {
			debug(0, "fPix");
			sourceS->skip(9);
			maskFlags = sourceS->readByte();
			maskOffs = sourceS->pos();
			sourceS->skip(chunkSize - 10);
			debug(0, "maskFlags = %d; maskOffs = %04X", maskFlags, maskOffs);
		} else if (chunkType == MKTAG('f','G','C','o')) {
			debug(0, "fGCo");
			_hasPalette = true;
			_paletteColorCount = chunkSize / 3;
			_picturePalette = new byte[_paletteColorCount * 3];
			sourceS->read(_picturePalette, _paletteColorCount * 3);
		} else {
			error("PictureResource::loadChunked() Invalid chunk %08X at %08X", chunkType, sourceS->pos());
		}

	}

	if (!cmdOffs || !pixelOffs /*|| !maskOffs*/ || !lineSize || !width || !height) {
		error("PictureResource::loadChunked() Error parsing the picture data, one or more chunks/parameters are missing");
	}

	_picture = new Graphics::Surface();
	_picture->create(width, height, Graphics::PixelFormat::createFormatCLUT8());

	decompressImage(source, *_picture, cmdOffs, pixelOffs, maskOffs, lineSize, cmdFlags, pixelFlags, maskFlags);

	delete sourceS;

}
开发者ID:AReim1982,项目名称:scummvm,代码行数:75,代码来源:resource.cpp


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