Examples with PngReader ar.com.hjg.pngj.PngReader used on opensource projects

Example 1 with PngReader

use of ar.com.hjg.pngj.PngReader in project imageio-ext by geosolutions-it.

the class PNGWriterTest method testTeXt.

@Test
public void testTeXt() throws Exception {
    PNGWriter writer = new PNGWriter();
    OutputStream out = null;
    File pngOut = null;
    final String title = "Title";
    final String description = "Sample Description";
    final String software = "ImageIO-Ext";
    final String author = "Me";
    try {
        // read test image
        BufferedImage read = ImageIO.read(TestData.file(this, "sample.jpeg"));
        pngOut = TestData.temp(this, "test.png", true);
        out = new FileOutputStream(pngOut);
        Map<String, String> textMetadata = new HashMap<String, String>();
        textMetadata.put("Title", title);
        textMetadata.put("Author", author);
        textMetadata.put("Software", software);
        textMetadata.put("Description", description);
        writer.writePNG(read, out, 1, FilterType.FILTER_NONE, textMetadata);
    } finally {
        if (out != null) {
            try {
                out.close();
            } catch (IOException e) {
            }
        }
    }
    BufferedImage test = ImageIO.read(pngOut);
    assertNotNull(test);
    PngReader reader = null;
    try {
        reader = new PngReader(pngOut);
        reader.readSkippingAllRows();
        PngMetadata metadata = reader.getMetadata();
        assertNotNull(metadata);
        assertEquals(title, metadata.getTxtForKey("Title"));
        assertEquals(description, metadata.getTxtForKey("Description"));
        assertEquals(author, metadata.getTxtForKey("Author"));
        assertEquals(software, metadata.getTxtForKey("Software"));
    } finally {
        if (reader != null) {
            reader.close();
        }
    }
}