| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* $Id$ */ |
| |
| package org.apache.fop.render.ps; |
| |
| import java.awt.Rectangle; |
| import java.awt.geom.Rectangle2D; |
| import java.io.IOException; |
| |
| import org.apache.xmlgraphics.image.loader.ImageFlavor; |
| import org.apache.xmlgraphics.image.loader.ImageInfo; |
| import org.apache.xmlgraphics.image.loader.ImageManager; |
| import org.apache.xmlgraphics.image.loader.pipeline.ImageProviderPipeline; |
| import org.apache.xmlgraphics.ps.DSCConstants; |
| import org.apache.xmlgraphics.ps.PSGenerator; |
| import org.apache.xmlgraphics.ps.PSResource; |
| |
| import org.apache.fop.render.ImageHandlerRegistry; |
| import org.apache.fop.render.RenderingContext; |
| |
| /** |
| * Utility code for rendering images in PostScript. |
| */ |
| public class PSImageUtils extends org.apache.xmlgraphics.ps.PSImageUtils { |
| |
| /** |
| * Indicates whether the given image (identified by an {@link ImageInfo} object) shall be |
| * inlined rather than generated as a PostScript form. |
| * @param info the info object for the image |
| * @param renderingContext the rendering context |
| * @return true if the image shall be inlined, false if forms shall be used. |
| */ |
| public static boolean isImageInlined(ImageInfo info, PSRenderingContext renderingContext) { |
| String uri = info.getOriginalURI(); |
| if (uri == null || "".equals(uri)) { |
| return true; |
| } |
| //Investigate choice for inline mode |
| ImageFlavor[] inlineFlavors = determineSupportedImageFlavors(renderingContext); |
| ImageManager manager = renderingContext.getUserAgent().getImageManager(); |
| ImageProviderPipeline[] inlineCandidates |
| = manager.getPipelineFactory().determineCandidatePipelines( |
| info, inlineFlavors); |
| ImageProviderPipeline inlineChoice = manager.choosePipeline(inlineCandidates); |
| ImageFlavor inlineFlavor = (inlineChoice != null |
| ? inlineChoice.getTargetFlavor() : null); |
| |
| //Create a rendering context for form creation |
| PSRenderingContext formContext = renderingContext.toFormContext(); |
| |
| //Investigate choice for form mode |
| ImageFlavor[] formFlavors = determineSupportedImageFlavors(formContext); |
| ImageProviderPipeline[] formCandidates |
| = manager.getPipelineFactory().determineCandidatePipelines( |
| info, formFlavors); |
| ImageProviderPipeline formChoice = manager.choosePipeline(formCandidates); |
| ImageFlavor formFlavor = (formChoice != null ? formChoice.getTargetFlavor() : null); |
| |
| //Inline if form is not supported or if a better choice is available with inline mode |
| return formFlavor == null || !formFlavor.equals(inlineFlavor); |
| } |
| |
| private static ImageFlavor[] determineSupportedImageFlavors(RenderingContext renderingContext) { |
| ImageFlavor[] inlineFlavors; |
| ImageHandlerRegistry imageHandlerRegistry |
| = renderingContext.getUserAgent().getImageHandlerRegistry(); |
| inlineFlavors = imageHandlerRegistry.getSupportedFlavors(renderingContext); |
| return inlineFlavors; |
| } |
| |
| /** |
| * Draws a form at a given location. |
| * @param form the form resource |
| * @param info the image info object representing the image in the form |
| * @param rect the target rectangle (coordinates in millipoints) |
| * @param generator the PostScript generator |
| * @throws IOException if an I/O error occurs |
| */ |
| public static void drawForm(PSResource form, ImageInfo info, Rectangle rect, |
| PSGenerator generator) throws IOException { |
| Rectangle2D targetRect = new Rectangle2D.Double( |
| rect.getMinX() / 1000.0, |
| rect.getMinY() / 1000.0, |
| rect.getWidth() / 1000.0, |
| rect.getHeight() / 1000.0); |
| generator.saveGraphicsState(); |
| translateAndScale(generator, |
| info.getSize().getDimensionPt(), targetRect); |
| |
| //The following %%IncludeResource marker is needed later by ResourceHandler! |
| generator.writeDSCComment(DSCConstants.INCLUDE_RESOURCE, form); |
| generator.getResourceTracker().notifyResourceUsageOnPage(form); |
| |
| generator.writeln(form.getName() + " execform"); |
| generator.restoreGraphicsState(); |
| } |
| |
| |
| } |