/*
* Copyright 2006-2017 ICEsoft Technologies Canada Corp.
*
* Licensed 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.icepdf.core.pobjects.graphics;
import org.icepdf.core.pobjects.ImageStream;
import org.icepdf.core.pobjects.Page;
import org.icepdf.core.pobjects.Resources;
import java.awt.*;
import java.awt.geom.Point2D;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* The MipMappedImageReference will create several scaled instance of the
* specified image. The images are all smaller then the original image and
* are painted as the page zoom level is lowered. The main idea here is that small
* images are painted at smaller zoom levels which in theory speeds up the image
* paint time.
*
* @since 5.0
*/
class MipMappedImageReference extends ImageReference {
private static final Logger logger =
Logger.getLogger(MipMappedImageReference.class.toString());
private ArrayList<ImageReference> images;
protected MipMappedImageReference(ImageStream imageStream, GraphicsState graphicsState,
Resources resources, int imageIndex,
Page page) {
super(imageStream, graphicsState, resources, imageIndex, page);
images = new ArrayList<ImageReference>();
ImageReference imageReference =
new ImageStreamReference(imageStream, graphicsState, resources, imageIndex, page);
images.add(imageReference);
int width = imageReference.getWidth();
int height = imageReference.getHeight();
// disable proxy as we need to scale each image from the previous
// and thus need to do the downscale in one shot.
useProxy = false;
try {
while (width > 20 && height > 20) {
width /= 2;
height /= 2;
imageReference = new ScaledImageReference(imageReference, graphicsState, resources,
width, height, imageIndex, page);
images.add(imageReference);
}
} catch (InterruptedException e) {
logger.log(Level.FINER, "Error loading image: " + imageStream.getPObjectReference() +
" " + imageStream.toString(), e);
}
}
public int getWidth() {
return images.get(0).getWidth();
}
public int getHeight() {
return images.get(0).getHeight();
}
public BufferedImage getImage() throws InterruptedException {
return images.get(0).getImage();
}
public void drawImage(Graphics2D aG, int aX, int aY, int aW, int aH) throws InterruptedException {
ImageReference imageReference = chooseImage(aG, aX, aY, aW, aH);
imageReference.drawImage(aG, aX, aY, aW, aH);
}
private ImageReference chooseImage(Graphics2D aG, int aX, int aY, int aW, int aH) {
Point2D.Double in = new Point2D.Double(aX, aY);
Point2D.Double p1 = new Point2D.Double();
Point2D.Double p2 = new Point2D.Double();
aG.getTransform().transform(in, p1);
in.x = aW;
aG.getTransform().transform(in, p2);
int distSq1 = (int) Math.round(p1.distanceSq(p2));
in.x = aX;
in.y = aH;
aG.getTransform().transform(in, p2);
int distSq2 = (int) Math.round(p1.distanceSq(p2));
int maxDistSq = Math.max(distSq1, distSq2);
int level = 0;
ImageReference image = images.get(level);
int width = image.getWidth();
int height = image.getHeight();
while (level < (images.size() - 1) &&
(width * width / 4) > maxDistSq &&
(height * height / 4) > maxDistSq) {
image = images.get(level++);
width = image.getWidth();
height = image.getHeight();
}
return image;
}
// no need to implement as this class class calls ScaledImage and MipMapped
// as needed.
public BufferedImage call() {
return null;
}
}