RLECompressionTest.java 文件源码

public void doTest(int type) throws IOException {
    BufferedImage src = getTestImage(type);

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ImageOutputStream ios = ImageIO.createImageOutputStream(baos);

    ImageWriter writer = ImageIO.getImageWritersByFormatName("BMP").next();
    writer.setOutput(ios);

    ImageWriteParam wparam = writer.getDefaultWriteParam();
    wparam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    switch(type) {
        case TEST_RLE8:
            wparam.setCompressionType("BI_RLE8");
            break;
        case TEST_RLE4:
            wparam.setCompressionType("BI_RLE4");
            break;
        default:
            throw new IllegalArgumentException("Wrong test type: " + type);
    }

    writer.write(null, new IIOImage(src, null, null), wparam);

    ios.close();
    baos.close();

    // read result
    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

    BufferedImage dst = ImageIO.read(bais);

    checkResult(src, dst);
}