本文整理汇总了Java中javax.imageio.stream.ImageInputStream.seek方法的典型用法代码示例。如果您正苦于以下问题：Java ImageInputStream.seek方法的具体用法？Java ImageInputStream.seek怎么用？Java ImageInputStream.seek使用的例子？那么, 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.seek方法的2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: getThumbnail
import javax.imageio.stream.ImageInputStream; //导入方法依赖的package包/类
BufferedImage getThumbnail(ImageInputStream iis,
JPEGImageReader reader)
throws IOException {
iis.mark();
iis.seek(streamPos);
DataBufferByte buffer = new DataBufferByte(getLength());
readByteBuffer(iis,
buffer.getData(),
reader,
1.0F,
0.0F);
iis.reset();
WritableRaster raster =
Raster.createInterleavedRaster(buffer,
thumbWidth,
thumbHeight,
thumbWidth*3,
3,
new int [] {0, 1, 2},
null);
ColorModel cm = new ComponentColorModel(JPEG.JCS.sRGB,
false,
false,
ColorModel.OPAQUE,
DataBuffer.TYPE_BYTE);
return new BufferedImage(cm,
raster,
false,
null);
}
示例2: reformatDiscontiguousData
import javax.imageio.stream.ImageInputStream; //导入方法依赖的package包/类
/**
* Reformats bit-discontiguous data into the {@code DataBuffer}
* of the supplied {@code WritableRaster}.
*/
private static void reformatDiscontiguousData(byte[] buf,
int[] bitsPerSample,
int stride,
int w,
int h,
WritableRaster raster)
throws IOException {
// Get SampleModel info.
SampleModel sm = raster.getSampleModel();
int numBands = sm.getNumBands();
// Initialize input stream.
ByteArrayInputStream is = new ByteArrayInputStream(buf);
ImageInputStream iis = new MemoryCacheImageInputStream(is);
// Reformat.
long iisPosition = 0L;
int y = raster.getMinY();
for(int j = 0; j < h; j++, y++) {
iis.seek(iisPosition);
int x = raster.getMinX();
for(int i = 0; i < w; i++, x++) {
for(int b = 0; b < numBands; b++) {
long bits = iis.readBits(bitsPerSample[b]);
raster.setSample(x, y, b, (int)bits);
}
}
iisPosition += stride;
}
}