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- /* ====================================================================
- 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.
- ==================================================================== */
-
- package org.apache.poi.hwmf.draw;
-
- import java.awt.Dimension;
- import java.awt.Graphics2D;
- import java.awt.Insets;
- import java.awt.RenderingHints;
- import java.awt.geom.Dimension2D;
- import java.awt.geom.Rectangle2D;
- import java.awt.image.BufferedImage;
- import java.io.ByteArrayInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.nio.charset.Charset;
- import java.util.Iterator;
-
- import org.apache.poi.common.usermodel.GenericRecord;
- import org.apache.poi.hwmf.usermodel.HwmfEmbedded;
- import org.apache.poi.hwmf.usermodel.HwmfPicture;
- import org.apache.poi.sl.draw.BitmapImageRenderer;
- import org.apache.poi.sl.draw.DrawPictureShape;
- import org.apache.poi.sl.draw.Drawable;
- import org.apache.poi.sl.draw.EmbeddedExtractor;
- import org.apache.poi.sl.draw.ImageRenderer;
- import org.apache.poi.sl.usermodel.PictureData.PictureType;
- import org.apache.poi.util.Internal;
- import org.apache.poi.util.Units;
-
- /**
- * Helper class which is instantiated by {@link DrawPictureShape}
- * via reflection
- */
- public class HwmfImageRenderer implements ImageRenderer, EmbeddedExtractor {
- HwmfPicture image;
- double alpha;
- boolean charsetInitialized = false;
-
- @Override
- public boolean canRender(String contentType) {
- return PictureType.WMF.contentType.equalsIgnoreCase(contentType);
- }
-
- @Override
- public void loadImage(InputStream data, String contentType) throws IOException {
- if (!PictureType.WMF.contentType.equals(contentType)) {
- throw new IOException("Invalid picture type");
- }
- image = new HwmfPicture(data);
- }
-
- @Override
- public void loadImage(byte[] data, String contentType) throws IOException {
- if (!PictureType.WMF.contentType.equals(contentType)) {
- throw new IOException("Invalid picture type");
- }
- image = new HwmfPicture(new ByteArrayInputStream(data));
- }
-
- @Override
- public Dimension2D getDimension() {
- return Units.pointsToPixel(image == null ? new Dimension() : image.getSize());
- }
-
- @Override
- public void setAlpha(double alpha) {
- this.alpha = alpha;
- }
-
- @Override
- public BufferedImage getImage() {
- return getImage(getDimension());
- }
-
- @Override
- public BufferedImage getImage(Dimension2D dim) {
- if (image == null) {
- return new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
- }
-
- BufferedImage bufImg = new BufferedImage((int)dim.getWidth(), (int)dim.getHeight(), BufferedImage.TYPE_INT_ARGB);
- Graphics2D g = bufImg.createGraphics();
- g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
- g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
- g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);
- g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
- image.draw(g, new Rectangle2D.Double(0,0,dim.getWidth(),dim.getHeight()));
- g.dispose();
-
- return BitmapImageRenderer.setAlpha(bufImg, alpha);
- }
-
- @Override
- public boolean drawImage(Graphics2D graphics, Rectangle2D anchor) {
- return drawImage(graphics, anchor, null);
- }
-
- @Override
- public boolean drawImage(Graphics2D graphics, Rectangle2D anchor, Insets clip) {
- if (image == null) {
- return false;
- }
-
- Charset cs = (Charset)graphics.getRenderingHint(Drawable.DEFAULT_CHARSET);
- if (cs != null && !charsetInitialized) {
- setDefaultCharset(cs);
- }
-
- HwmfGraphicsState graphicsState = new HwmfGraphicsState();
- graphicsState.backup(graphics);
-
- boolean isClipped = true;
- if (clip == null) {
- isClipped = false;
- clip = new Insets(0,0,0,0);
- }
-
- if (isClipped) {
- graphics.clip(anchor);
- }
-
- image.draw(graphics, getOuterBounds(anchor, clip));
-
- graphicsState.restore(graphics);
-
- return true;
- }
-
- @Internal
- public static Rectangle2D getOuterBounds(Rectangle2D anchor, Insets clip) {
- double outerWidth = anchor.getWidth() / ((100_000.-clip.left-clip.right)/100_000.);
- double outerHeight = anchor.getHeight() / ((100_000.-clip.top-clip.bottom)/100_000.);
- double outerX = anchor.getX() - (clip.left / 100_000.) * outerWidth;
- double outerY = anchor.getY() - (clip.top / 100_000.) * outerHeight;
- return new Rectangle2D.Double(outerX, outerY, outerWidth, outerHeight);
- }
-
- @Override
- public GenericRecord getGenericRecord() {
- return image;
- }
-
-
- @Override
- public Iterable<EmbeddedExtractor.EmbeddedPart> getEmbeddings() {
- return getEmbeddings(image.getEmbeddings());
- }
-
- @Internal
- public static Iterable<EmbeddedPart> getEmbeddings(Iterable<HwmfEmbedded> embs) {
- return () -> {
- final Iterator<HwmfEmbedded> embit = embs.iterator();
- final int[] idx = { 1 };
- return new Iterator<EmbeddedExtractor.EmbeddedPart>() {
- @Override
- public boolean hasNext() {
- return embit.hasNext();
- }
-
- @Override
- public EmbeddedExtractor.EmbeddedPart next() {
- EmbeddedExtractor.EmbeddedPart ep = new EmbeddedExtractor.EmbeddedPart();
- HwmfEmbedded emb = embit.next();
- ep.setData(emb::getRawData);
- ep.setName("embed_"+(idx[0]++)+emb.getEmbeddedType().extension);
- return ep;
- }
- };
- };
- }
-
- @Override
- public Rectangle2D getNativeBounds() {
- return image.getBounds();
- }
-
- @Override
- public Rectangle2D getBounds() {
- return Units.pointsToPixel(image == null ? new Rectangle2D.Double() : image.getBoundsInPoints());
- }
-
- @Override
- public void setDefaultCharset(Charset defaultCharset) {
- image.setDefaultCharset(defaultCharset);
- charsetInitialized = true;
- }
- }
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