org.jpedal.objects.acroforms.overridingImplementations.FixImageIcon Maven / Gradle / Ivy
/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/support/
*
* (C) Copyright 1997-2017 IDRsolutions and Contributors.
*
* This file is part of JPedal/JPDF2HTML5
*
@LICENSE@
*
* ---------------
* FixImageIcon.java
* ---------------
*/
package org.jpedal.objects.acroforms.overridingImplementations;
import java.awt.*;
import java.awt.image.BufferedImage;
import javax.swing.SwingConstants;
import org.jpedal.io.PdfObjectReader;
import org.jpedal.objects.raw.FormObject;
import org.jpedal.objects.raw.FormStream;
import org.jpedal.objects.raw.PdfObject;
public class FixImageIcon extends CustomImageIcon implements SwingConstants {
private static final long serialVersionUID = 8946195842453749725L;
final PdfObject formObject;
/**
* used to tell the paint method that we need to scale up the image for printing
*/
private boolean currentlyPrinting;
private int printMultiplier = 1;
/**
* -1 means only one image,
0 means unselected,
1 means selected
*
if there is only one image it is stored as the selected image
*/
private int selected = -1;
private static final int UNSELECTEDICON = 0;
private static final int SELECTEDICON = 1;
/**
* stores the root image for selected and unselected icons
*/
private BufferedImage rootImageSelected, rootImageUnselected;
/**
* stores the final image after any icon rotation
*/
private BufferedImage imageSelected, imageUnselected;
private PdfObject selObj;
private PdfObject unSelObj;
private PdfObjectReader currentpdffile;
private int subtype;
/**
* if 0 no change, 1 offset image, 2 invert image
*/
private int offsetImage;
/**
* constructor to be used for one image
*/
public FixImageIcon(final PdfObject formObject, final BufferedImage img, final int iconRot) {
super(iconRot);
this.formObject = formObject;
if (img != null) {
imageSelected = img;
} else
//if null store opaque image
{
imageSelected = FormObject.getOpaqueImage();
}
selected = -1;
}
/**
* new code to store the data to create the image when needed to the size needed
* offset = if 0 no change, 1 offset image, 2 invert image
*/
public FixImageIcon(final PdfObject formObject, final PdfObject imgObj, final int iconRot, final PdfObjectReader pdfObjectReader, final int type, final int offset) {
super(iconRot);
this.formObject = formObject;
selObj = imgObj;
selected = -1;
currentpdffile = pdfObjectReader;
subtype = type;
offsetImage = offset;
// if(selObj.getObjectRefAsString().equals("128 0 R") || selObj.getObjectRefAsString().equals("130 0 R"))
// debug = true;
}
/**
* new code that stores the data to create the image at the defined size needed.
* constructor for 2 images to be used for multipul pressed images,
*
sel should be 1 if its currently selected, 0 if unselected.
*
offset = if 0 no change, 1 offset image, 2 invert image
*/
public FixImageIcon(final PdfObject formObject, final PdfObject selObject, final PdfObject unselObject, final int iconRot, final int sel,
final PdfObjectReader pdfObjectReader, final int type, final int offset) {
super(iconRot);
this.formObject = formObject;
selObj = selObject;
unSelObj = unselObject;
selected = sel;
currentpdffile = pdfObjectReader;
subtype = type;
offsetImage = offset;
// if(selObj.getObjectRefAsString().equals("128 0 R") || selObj.getObjectRefAsString().equals("130 0 R"))
// debug = true;
}
/**
* returns the currently selected Image
*/
@Override
public Image getImage() {
final Image image;
checkAndCreateimage();
switch (selected) {
case UNSELECTEDICON:
image = imageUnselected;
break;
default: //or SELECTEDICON
image = imageSelected;
break;
}
return image;
}
@Override
public synchronized void paintIcon(final Component c, final Graphics g, final int x, final int y) {
final BufferedImage image = (BufferedImage) getImage();
if (image == null) {
return;
}
if (c.isEnabled()) {
g.setColor(c.getBackground());
} else {
g.setColor(Color.gray);
}
final Graphics2D g2 = (Graphics2D) g;
if (iconWidth > 0 && iconHeight > 0) {
int drawWidth = iconWidth;
int drawHeight = iconHeight;
boolean rotateIcon = false;
if ((iconRotation == 270 || iconRotation == 90)) {
//mark to rotate the x and y positions later
rotateIcon = true;
//swap width and height so that the image is drawn in the corect orientation
//without changing the raw width and height for the icon size
drawWidth = iconHeight;
drawHeight = iconWidth;
}
//only work out scaling if we have a dictionary of an image, as otherwise it could be a blank image (i.e. 1 x 1).
if (currentpdffile != null) {
//work out w,h which we want to draw inside our icon to maintain aspect ratio.
float ws = drawWidth / (float) image.getWidth(null);
float hs = drawHeight / (float) image.getHeight(null);
//check if dimensions are correct and alter if not
final float diff = ws - hs;
final int diffInt = (int) diff;
if (diffInt != 0) {
//reserve the current rotation marker as its wrong
rotateIcon = !rotateIcon;
final int tmp = drawWidth;
drawWidth = drawHeight;
drawHeight = tmp;
ws = drawWidth / (float) image.getWidth(null);
hs = drawHeight / (float) image.getHeight(null);
}
drawWidth = (int) (ws * image.getWidth(null));
drawHeight = (int) (hs * image.getHeight(null));
}
//now work out the x,y position to keep the icon in the centre of the icon
int posX = 0, posY = 0;
if (currentpdffile != null) {
if (rotateIcon) {
posX = (iconHeight - drawWidth) / 2;
posY = (iconWidth - drawHeight) / 2;
} else {
posX = (iconWidth - drawWidth) / 2;
posY = (iconHeight - drawHeight) / 2;
}
}
final int finalRotation;
if (displaySingle) {
finalRotation = validateRotationValue(pageRotate - iconRotation);
} else {
finalRotation = pageRotate;
}
/* with new decode at needed size code the resize (drawImage) may not be needed. */
switch (finalRotation) {
case 270:
g2.rotate(-Math.PI / 2);
g2.translate(-drawWidth, 0);
g2.drawImage(image, -posX, posY, drawWidth, drawHeight, null);
break;
case 90:
g2.rotate(Math.PI / 2);
g2.translate(0, -drawHeight);
g2.drawImage(image, posX, -posY, drawWidth, drawHeight, null);
break;
case 180:
g2.rotate(Math.PI);
g2.translate(-drawWidth, -drawHeight);
g2.drawImage(image, -posX, -posY, drawWidth, drawHeight, null);
break;
default:
g2.drawImage(image, posX, posY, drawWidth, drawHeight, null);
break;
}
} else {
g2.drawImage(image, 0, 0, null);
}
g2.translate(-x, -y);
}
private void checkAndCreateimage() {
//check if pdf object reader is defined, as we still use opaque images which do NOT need redecoding
if (currentpdffile == null) {
return;
}
/* NOTE the image code may need changing so that we store up to a certain size image
* and not store large images, once the user has rescaled to a more normal size.
* we could store the root width and height for the 100% size and use 200% as the
* highest image size to keep.
*
* if we do this the best way would be to have an object that we move the decode routine to, and
* then when we read the 100% values from the image object we can store them in that size.
*/
//define normal sizes for normal use
int newWidth = iconWidth, newHeight = iconHeight;
//if printing define larger sizes for root image, but dont change icon height and width
if (currentlyPrinting) {
newWidth = iconWidth * printMultiplier;
newHeight = iconHeight * printMultiplier;
}
//decode images at needed size
switch (selected) {
case UNSELECTEDICON:
if (rootImageUnselected == null
|| newWidth > (rootImageUnselected.getWidth(null))
|| newHeight > (rootImageUnselected.getHeight(null))
|| newWidth < (rootImageUnselected.getWidth(null) / MAXSCALEFACTOR)
|| newHeight < (rootImageUnselected.getHeight(null) / MAXSCALEFACTOR)) {
rootImageUnselected = FormStream.decode(formObject, currentpdffile, unSelObj, subtype, newWidth, newHeight, offsetImage, 1);
imageUnselected = FormStream.rotate(rootImageUnselected, iconRotation);
} //icon rotation is always defined in the constructor so we dont need to change it
break;
default: //or SELECTEDICON
if (rootImageSelected == null
|| newWidth > (rootImageSelected.getWidth(null))
|| newHeight > (rootImageSelected.getHeight(null))
|| newWidth < (rootImageSelected.getWidth(null) / MAXSCALEFACTOR)
|| newHeight < (rootImageSelected.getHeight(null) / MAXSCALEFACTOR)) {
rootImageSelected = FormStream.decode(formObject, currentpdffile, selObj, subtype, newWidth, newHeight, offsetImage, 1);
imageSelected = FormStream.rotate(rootImageSelected, iconRotation);
} //icon rotation is always defined in the constructor so we dont need to change it
break;
}
}
/**
* if this imageicon was constructed for use with one image this will do nothing,
*
otherwise it will set the selected image to be the selected image if the flag is true
* or the unseleced image if the flag is false.
*/
public void swapImage(final boolean selectedImage) {
if (selected == -1) {
return;
}
if (selectedImage) {
selected = SELECTEDICON;
} else {
selected = UNSELECTEDICON;
}
}
/**
* generates higher quality images
*/
public void setPrinting(final boolean print, final int multiplier) {
currentlyPrinting = print;
printMultiplier = multiplier;
checkAndCreateimage();
}
}
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