本文整理汇总了Java中javax.imageio.stream.ImageInputStream.readByte方法的典型用法代码示例。如果您正苦于以下问题：Java ImageInputStream.readByte方法的具体用法？Java ImageInputStream.readByte怎么用？Java ImageInputStream.readByte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类javax.imageio.stream.ImageInputStream的用法示例。
在下文中一共展示了ImageInputStream.readByte方法的3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Java代码示例。
示例1: main
import javax.imageio.stream.ImageInputStream; //导入方法依赖的package包/类
public static void main(String[] args) throws IOException {
MarkTryFinallyReproducerSpi spi = new MarkTryFinallyReproducerSpi();
IIORegistry.getDefaultInstance().registerServiceProvider(spi);
ImageInputStream iis1 =
new NotClosingImageInputStream(ImageIO.createImageInputStream(new ByteArrayInputStream(bmp)));
iis1.readByte();
iis1.mark();
long p1 = iis1.getStreamPosition();
iis1.readByte();
iis1.mark();
long p2 = iis1.getStreamPosition();
BufferedImage bi1 = ImageIO.read(iis1);
iis1.reset();
long pn2 = iis1.getStreamPosition();
iis1.reset();
long pn1 = iis1.getStreamPosition();
if (p1 != pn1 || p2!= pn2) {
throw new RuntimeException("Exception from call to canDecodeInput in ImageIO. " +
"Corrupted stack in ImageInputStream");
}
}
示例2: readMultiByteInteger
import javax.imageio.stream.ImageInputStream; //导入方法依赖的package包/类
public static int readMultiByteInteger(ImageInputStream iis)
throws IOException
{
int value = iis.readByte();
int result = value & 0x7f;
while((value & 0x80) == 0x80) {
result <<= 7;
value = iis.readByte();
result |= (value & 0x7f);
}
return result;
}
示例3: canDecodeInput
import javax.imageio.stream.ImageInputStream; //导入方法依赖的package包/类
public boolean canDecodeInput(Object source) throws IOException {
if (!(source instanceof ImageInputStream)) {
return false;
}
ImageInputStream stream = (ImageInputStream)source;
stream.mark();
try {
int type = stream.readByte(); // TypeField
int fixHeaderField = stream.readByte();
// check WBMP "header"
if (type != 0 || fixHeaderField != 0) {
// while WBMP reader does not support ext WBMP headers
return false;
}
int width = ReaderUtil.readMultiByteInteger(stream);
int height = ReaderUtil.readMultiByteInteger(stream);
// check image dimension
if (width <= 0 || height <= 0) {
return false;
}
long dataLength = stream.length();
if (dataLength == -1) {
// We can't verify that amount of data in the stream
// corresponds to image dimension because we do not know
// the length of the data stream.
// Assuming that wbmp image are used for mobile devices,
// let's introduce an upper limit for image dimension.
// In case if exact amount of raster data is unknown,
// let's reject images with dimension above the limit.
return (width < MAX_WBMP_WIDTH) && (height < MAX_WBMP_HEIGHT);
}
dataLength -= stream.getStreamPosition();
long scanSize = (width / 8) + ((width % 8) == 0 ? 0 : 1);
return (dataLength == scanSize * height);
} finally {
stream.reset();
}
}