List of preloadImage() Examples

Examples of preloadImage()

org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()
Preloads an image, i.e. the format of the image is identified and some basic information (MIME type, intrinsic size and possibly other values) are loaded and returned as an ImageInfo object. Note that the image is not fully loaded normally. Only with certain formats the image is already fully loaded and references added to the ImageInfo's custom objects (see {@link ImageInfo#getOriginalImage()}).
The reason for the preloading: Apache FOP, for example, only needs the image's intrinsic size during layout. Only when the document is rendered to the final format does FOP need to load the full image. Like this a lot of memory can be saved. @param uri the original URI of the image @param session the session context through which to resolve the URI @return the ImageInfo object created from the image @throws ImageException If no suitable ImagePreloader can be found to load the image orif an error occurred while preloading the image. @throws IOException If an I/O error occurs while preloading the image
org.apache.xmlgraphics.image.loader.spi.ImagePreloader.preloadImage()
"Preloads" an image, i.e. indentifies whether the source image is supported by this implementation and determines the image's intrinsic size and possibly some additional information. The image is usually not fully loaded at this time to conserve memory. @param originalURI the original (unresolved) URI of the image @param src a image source the image is loaded from @param context the context object that provides configuration information @return an image info object with the basic information about an image @throws ImageException if an error occurs while preloading the image @throws IOException if an I/O error occurs while preloading the image

Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

        ff.setTargetResolution(300);


        FOUserAgent userAgent = ff.newFOUserAgent();


        ImageManager manager = ff.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);


        Image img = manager.getImage(info, XMLNamespaceEnabledImageFlavor.SVG_DOM,
                userAgent.getImageSessionContext());
        assertNotNull("Image must not be null", img);

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

        String uri = "test/resources/images/testChart.wmf";


        FOUserAgent userAgent = fopFactory.newFOUserAgent();


        ImageManager manager = fopFactory.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);


        Image img = manager.getImage(info, ImageFlavor.RENDERED_IMAGE,
                userAgent.getImageSessionContext());
        assertNotNull("Image must not be null", img);

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

        String uri = "test/resources/fop/svg/images.svg";
        FopFactory ff = FopFactory.newInstance();
        FOUserAgent userAgent = ff.newFOUserAgent();


        ImageManager manager = ff.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);


        Image img = manager.getImage(info, XMLNamespaceEnabledImageFlavor.SVG_DOM,
                userAgent.getImageSessionContext());
        assertNotNull("Image must not be null", img);

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()


    private void checkSVGFile(String uri) throws ImageException, IOException {
        FOUserAgent userAgent = fopFactory.newFOUserAgent();


        ImageManager manager = fopFactory.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);
        assertEquals(MimeConstants.MIME_SVG, info.getMimeType());
        assertEquals(uri, info.getOriginalURI());
        assertEquals(16, info.getSize().getWidthPx());
        assertEquals(16, info.getSize().getHeightPx());

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

    public void testSVGNoSize() throws Exception {
        String uri = "test/resources/images/img.svg";
        FOUserAgent userAgent = fopFactory.newFOUserAgent();


        ImageManager manager = fopFactory.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);
        assertEquals(MimeConstants.MIME_SVG, info.getMimeType());
        assertEquals(uri, info.getOriginalURI());
        assertEquals(100, info.getSize().getWidthPx()); //100 = default viewport size
        assertEquals(100, info.getSize().getHeightPx());

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

            }


        });


        ImageManager manager = fopFactory.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);
        assertEquals(MimeConstants.MIME_SVG, info.getMimeType());
        assertEquals(uri, info.getOriginalURI());
        assertEquals(20, info.getSize().getWidthPx()); //100 = default viewport size
        assertEquals(20, info.getSize().getHeightPx());

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

        String uri = "test/resources/images/testChart.wmf";


        FOUserAgent userAgent = fopFactory.newFOUserAgent();


        ImageManager manager = fopFactory.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);
        assertEquals(ImageWMF.MIME_WMF, info.getMimeType());
        assertEquals(uri, info.getOriginalURI());
        assertEquals(27940, info.getSize().getWidthPx());
        assertEquals(21590, info.getSize().getHeightPx());

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

     */
    protected void drawImageUsingDocument(Document doc, Rectangle rect) {
        ImageManager manager = getFopFactory().getImageManager();
        ImageInfo info = null;
        try {
            info = manager.preloadImage(null, new DOMSource(doc));


            drawImageUsingImageHandler(info, rect);
        } catch (ImageException ie) {
            ResourceEventProducer eventProducer = ResourceEventProducer.Provider.get(
                    getUserAgent().getEventBroadcaster());

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()


    private void checkSVGFile(String uri) throws ImageException, IOException {
        FOUserAgent userAgent = fopFactory.newFOUserAgent();


        ImageManager manager = fopFactory.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);
        assertEquals(MimeConstants.MIME_SVG, info.getMimeType());
        assertEquals(uri, info.getOriginalURI());
        assertEquals(16, info.getSize().getWidthPx());
        assertEquals(16, info.getSize().getHeightPx());

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Examples of org.apache.xmlgraphics.image.loader.ImageManager.preloadImage()

    public void testSVGNoSize() throws Exception {
        String uri = "test/resources/images/img.svg";
        FOUserAgent userAgent = fopFactory.newFOUserAgent();


        ImageManager manager = fopFactory.getImageManager();
        ImageInfo info = manager.preloadImage(uri, userAgent.getImageSessionContext());
        assertNotNull("ImageInfo must not be null", info);
        assertEquals(MimeConstants.MIME_SVG, info.getMimeType());
        assertEquals(uri, info.getOriginalURI());
        assertEquals(100, info.getSize().getWidthPx()); //100 = default viewport size
        assertEquals(100, info.getSize().getHeightPx());

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