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/*
This file is part of the iText (R) project.
Copyright (c) 1998-2023 Apryse Group NV
Authors: Apryse Software.
This program is offered under a commercial and under the AGPL license.
For commercial licensing, contact us at https://itextpdf.com/sales. For AGPL licensing, see below.
AGPL licensing:
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see .
*/
package com.itextpdf.layout.element;
import com.itextpdf.io.logs.IoLogMessageConstant;
import com.itextpdf.io.image.ImageData;
import com.itextpdf.kernel.exceptions.PdfException;
import com.itextpdf.kernel.pdf.canvas.wmf.WmfImageData;
import com.itextpdf.kernel.pdf.tagging.StandardRoles;
import com.itextpdf.kernel.pdf.tagutils.DefaultAccessibilityProperties;
import com.itextpdf.kernel.pdf.tagutils.AccessibilityProperties;
import com.itextpdf.layout.exceptions.LayoutExceptionMessageConstant;
import com.itextpdf.layout.properties.ObjectFit;
import com.itextpdf.layout.tagging.IAccessibleElement;
import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
import com.itextpdf.kernel.pdf.xobject.PdfImageXObject;
import com.itextpdf.kernel.pdf.xobject.PdfXObject;
import com.itextpdf.layout.properties.Property;
import com.itextpdf.layout.layout.LayoutPosition;
import com.itextpdf.layout.properties.UnitValue;
import com.itextpdf.layout.renderer.IRenderer;
import com.itextpdf.layout.renderer.ImageRenderer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A layout element that represents an image for inclusion in the document model.
*/
public class Image extends AbstractElement implements ILeafElement, IAccessibleElement {
protected PdfXObject xObject;
protected DefaultAccessibilityProperties tagProperties;
/**
* Creates an {@link Image} from an image XObject, the representation of an
* image in PDF syntax.
*
* @param xObject an internal {@link PdfImageXObject}
*/
public Image(PdfImageXObject xObject) {
this.xObject = xObject;
}
/**
* Creates an {@link Image} from a form XObject, the representation of a
* form in PDF syntax.
*
* @param xObject an internal {@link PdfFormXObject}
*/
public Image(PdfFormXObject xObject) {
this.xObject = xObject;
}
/**
* Creates an {@link Image} from an image XObject, the representation of an
* image in PDF syntax, with a custom width.
*
* @param xObject an internal {@link PdfImageXObject}
* @param width a float value
*/
public Image(PdfImageXObject xObject, float width) {
this.xObject = xObject;
setWidth(width);
}
/**
* Creates an {@link Image} from an image XObject, the representation of an
* image in PDF syntax, with a custom width and on a fixed position.
*
* @param xObject an internal {@link PdfImageXObject}
* @param left a float value representing the horizontal offset of the lower left corner of the image
* @param bottom a float value representing the vertical offset of the lower left corner of the image
* @param width a float value
*/
public Image(PdfImageXObject xObject, float left, float bottom, float width) {
this.xObject = xObject;
setProperty(Property.LEFT, left);
setProperty(Property.BOTTOM, bottom);
setWidth(width);
setProperty(Property.POSITION, LayoutPosition.FIXED);
}
/**
* Creates an {@link Image} from an image XObject, the representation of an
* image in PDF syntax, on a fixed position.
*
* @param xObject an internal {@link PdfImageXObject}
* @param left a float value representing the horizontal offset of the lower left corner of the image
* @param bottom a float value representing the vertical offset of the lower left corner of the image
*/
public Image(PdfImageXObject xObject, float left, float bottom) {
this.xObject = xObject;
setProperty(Property.LEFT, left);
setProperty(Property.BOTTOM, bottom);
setProperty(Property.POSITION, LayoutPosition.FIXED);
}
/**
* Creates an {@link Image} from a form XObject, the representation of a
* form in PDF syntax.
*
* @param xObject an internal {@link PdfFormXObject}
* @param left a float value representing the horizontal offset of the lower left corner of the form
* @param bottom a float value representing the vertical offset of the lower left corner of the form
*/
public Image(PdfFormXObject xObject, float left, float bottom) {
this.xObject = xObject;
setProperty(Property.LEFT, left);
setProperty(Property.BOTTOM, bottom);
setProperty(Property.POSITION, LayoutPosition.FIXED);
}
/**
* Creates an {@link Image} from an image resource, read in from a file
* with the iText I/O module.
*
* @param img an internal representation of the {@link com.itextpdf.io.image.ImageData image resource}
*/
public Image(ImageData img) {
this(new PdfImageXObject(checkImageType(img)));
setProperty(Property.FLUSH_ON_DRAW, true);
}
/**
* Creates an {@link Image} from an image resource, read in from a file
* with the iText I/O module, on a fixed position.
*
* @param img an internal representation of the {@link com.itextpdf.io.image.ImageData image resource}
* @param left a float value representing the horizontal offset of the lower left corner of the image
* @param bottom a float value representing the vertical offset of the lower left corner of the image
*/
public Image(ImageData img, float left, float bottom) {
this(new PdfImageXObject(checkImageType(img)), left, bottom);
setProperty(Property.FLUSH_ON_DRAW, true);
}
/**
* Creates an {@link Image} from an image resource, read in from a file
* with the iText I/O module, with a custom width and on a fixed position.
*
* @param img an internal representation of the {@link com.itextpdf.io.image.ImageData image resource}
* @param left a float value representing the horizontal offset of the lower left corner of the image
* @param bottom a float value representing the vertical offset of the lower left corner of the image
* @param width a float value
*/
public Image(ImageData img, float left, float bottom, float width) {
this(new PdfImageXObject(checkImageType(img)), left, bottom, width);
setProperty(Property.FLUSH_ON_DRAW, true);
}
/**
* Gets the XObject contained in this image object
*
* @return a {@link PdfXObject}
*/
public PdfXObject getXObject() {
return xObject;
}
/**
* Sets the rotation radAngle.
*
* @param radAngle a value in radians
* @return this element
*/
public Image setRotationAngle(double radAngle) {
setProperty(Property.ROTATION_ANGLE, radAngle);
return this;
}
/**
* Gets the current left margin width of the element.
*
* @return the left margin width, as a {@link UnitValue} object
*/
public UnitValue getMarginLeft() {
return this.getProperty(Property.MARGIN_LEFT);
}
/**
* Sets the left margin width of the element.
*
* @param value the new left margin width
* @return this element
*/
public Image setMarginLeft(float value) {
UnitValue marginUV = UnitValue.createPointValue(value);
setProperty(Property.MARGIN_LEFT, marginUV);
return this;
}
/**
* Gets the current right margin width of the image.
*
* @return the right margin width, as a {@link UnitValue} object
*/
public UnitValue getMarginRight() {
return this.getProperty(Property.MARGIN_RIGHT);
}
/**
* Sets the right margin width of the image.
*
* @param value the new right margin width
* @return this image
*/
public Image setMarginRight(float value) {
UnitValue marginUV = UnitValue.createPointValue(value);
setProperty(Property.MARGIN_RIGHT, marginUV);
return this;
}
/**
* Gets the current top margin width of the image.
*
* @return the top margin width, as a {@link UnitValue} object
*/
public UnitValue getMarginTop() {
return this.getProperty(Property.MARGIN_TOP);
}
/**
* Sets the top margin width of the image.
*
* @param value the new top margin width
* @return this image
*/
public Image setMarginTop(float value) {
UnitValue marginUV = UnitValue.createPointValue(value);
setProperty(Property.MARGIN_TOP, marginUV);
return this;
}
/**
* Gets the current bottom margin width of the image.
*
* @return the bottom margin width, as a {@link UnitValue} object
*/
public UnitValue getMarginBottom() {
return this.getProperty(Property.MARGIN_BOTTOM);
}
/**
* Sets the bottom margin width of the image.
*
* @param value the new bottom margin width
* @return this image
*/
public Image setMarginBottom(float value) {
UnitValue marginUV = UnitValue.createPointValue(value);
setProperty(Property.MARGIN_BOTTOM, marginUV);
return this;
}
/**
* Sets the margins around the image to a series of new widths.
*
* @param marginTop the new margin top width
* @param marginRight the new margin right width
* @param marginBottom the new margin bottom width
* @param marginLeft the new margin left width
* @return this image
*/
public Image setMargins(float marginTop, float marginRight, float marginBottom, float marginLeft) {
return setMarginTop(marginTop).setMarginRight(marginRight).setMarginBottom(marginBottom).setMarginLeft(marginLeft);
}
/**
* Gets the current left padding width of the image.
*
* @return the left padding width, as a {@link UnitValue} object
*/
public UnitValue getPaddingLeft() {
return this.getProperty(Property.PADDING_LEFT);
}
/**
* Sets the left padding width of the image.
*
* @param value the new left padding width
* @return this image
*/
public Image setPaddingLeft(float value) {
UnitValue paddingUV = UnitValue.createPointValue(value);
setProperty(Property.PADDING_LEFT, paddingUV);
return (Image) (Object) this;
}
/**
* Gets the current right padding width of the image.
*
* @return the right padding width, as a {@link UnitValue} object
*/
public UnitValue getPaddingRight() {
return this.getProperty(Property.PADDING_RIGHT);
}
/**
* Sets the right padding width of the image.
*
* @param value the new right padding width
* @return this image
*/
public Image setPaddingRight(float value) {
UnitValue paddingUV = UnitValue.createPointValue(value);
setProperty(Property.PADDING_RIGHT, paddingUV);
return (Image) (Object) this;
}
/**
* Gets the current top padding width of the image.
*
* @return the top padding width, as a {@link UnitValue} object
*/
public UnitValue getPaddingTop() {
return this.getProperty(Property.PADDING_TOP);
}
/**
* Sets the top padding width of the image.
*
* @param value the new top padding width
* @return this image
*/
public Image setPaddingTop(float value) {
UnitValue paddingUV = UnitValue.createPointValue(value);
setProperty(Property.PADDING_TOP, paddingUV);
return (Image) (Object) this;
}
/**
* Gets the current bottom padding width of the image.
*
* @return the bottom padding width, as a {@link UnitValue} object
*/
public UnitValue getPaddingBottom() {
return this.getProperty(Property.PADDING_BOTTOM);
}
/**
* Sets the bottom padding width of the image.
*
* @param value the new bottom padding width
* @return this image
*/
public Image setPaddingBottom(float value) {
UnitValue paddingUV = UnitValue.createPointValue(value);
setProperty(Property.PADDING_BOTTOM, paddingUV);
return (Image) (Object) this;
}
/**
* Sets all paddings around the image to the same width.
*
* @param commonPadding the new padding width
* @return this image
*/
public Image setPadding(float commonPadding) {
return setPaddings(commonPadding, commonPadding, commonPadding, commonPadding);
}
/**
* Sets the paddings around the image to a series of new widths.
*
* @param paddingTop the new padding top width
* @param paddingRight the new padding right width
* @param paddingBottom the new padding bottom width
* @param paddingLeft the new padding left width
* @return this image
*/
public Image setPaddings(float paddingTop, float paddingRight, float paddingBottom, float paddingLeft) {
setPaddingTop(paddingTop);
setPaddingRight(paddingRight);
setPaddingBottom(paddingBottom);
setPaddingLeft(paddingLeft);
return this;
}
/**
* Scale the image relative to its default size.
*
* @param horizontalScaling the horizontal scaling coefficient. default value 1 = 100%
* @param verticalScaling the vertical scaling coefficient. default value 1 = 100%
* @return this element
*/
public Image scale(float horizontalScaling, float verticalScaling) {
setProperty(Property.HORIZONTAL_SCALING, horizontalScaling);
setProperty(Property.VERTICAL_SCALING, verticalScaling);
return this;
}
/**
* Scale the image to an absolute size. This method will preserve the
* width-height ratio of the image.
*
* @param fitWidth the new maximum width of the image
* @param fitHeight the new maximum height of the image
* @return this element
*/
public Image scaleToFit(float fitWidth, float fitHeight) {
float horizontalScaling = fitWidth / xObject.getWidth();
float verticalScaling = fitHeight / xObject.getHeight();
return scale(Math.min(horizontalScaling, verticalScaling), Math.min(horizontalScaling, verticalScaling));
}
/**
* Scale the image to an absolute size. This method will not
* preserve the width-height ratio of the image.
*
* @param fitWidth the new absolute width of the image
* @param fitHeight the new absolute height of the image
* @return this element
*/
public Image scaleAbsolute(float fitWidth, float fitHeight) {
float horizontalScaling = fitWidth / xObject.getWidth();
float verticalScaling = fitHeight / xObject.getHeight();
return scale(horizontalScaling, verticalScaling);
}
/**
* Sets the autoscale property for both width and height.
*
* @param autoScale whether or not to let the image resize automatically
* @return this image
*/
public Image setAutoScale(boolean autoScale) {
if (hasProperty(Property.AUTO_SCALE_WIDTH) && hasProperty(Property.AUTO_SCALE_HEIGHT) && autoScale &&
((boolean) this.getProperty(Property.AUTO_SCALE_WIDTH) ||
(boolean) this.getProperty(Property.AUTO_SCALE_HEIGHT))) {
Logger logger = LoggerFactory.getLogger(Image.class);
logger.warn(IoLogMessageConstant.IMAGE_HAS_AMBIGUOUS_SCALE);
}
setProperty(Property.AUTO_SCALE, autoScale);
return this;
}
//TODO(DEVSIX-1659):Remove bugged mention
/**
* Sets the autoscale property for the height of the image.
* Is currently bugged and will not work as expected.
* @param autoScale whether or not to let the image height resize automatically
* @return this image
*/
public Image setAutoScaleHeight(boolean autoScale) {
if (hasProperty(Property.AUTO_SCALE_WIDTH) && autoScale && (boolean) this.getProperty(Property.AUTO_SCALE_WIDTH)) {
setProperty(Property.AUTO_SCALE_WIDTH, false);
setProperty(Property.AUTO_SCALE_HEIGHT, false);
setProperty(Property.AUTO_SCALE, true);
} else {
setProperty(Property.AUTO_SCALE_WIDTH, autoScale);
}
return this;
}
/**
* Sets the autoscale property for the width of the image.
*
* @param autoScale whether or not to let the image width resize automatically
* @return this image
*/
public Image setAutoScaleWidth(boolean autoScale) {
if (hasProperty(Property.AUTO_SCALE_HEIGHT) && autoScale && (boolean) this.getProperty(Property.AUTO_SCALE_HEIGHT)) {
setProperty(Property.AUTO_SCALE_WIDTH, false);
setProperty(Property.AUTO_SCALE_HEIGHT, false);
setProperty(Property.AUTO_SCALE, true);
} else {
setProperty(Property.AUTO_SCALE_WIDTH, autoScale);
}
return this;
}
/**
* Sets values for a absolute repositioning of the Element. Also has as a
* side effect that the Element's {@link Property#POSITION} is changed to
* {@link LayoutPosition#FIXED fixed}.
*
* @param left horizontal position on the page
* @param bottom vertical position on the page
* @return this image.
*/
public Image setFixedPosition(float left, float bottom) {
setFixedPosition(left, bottom, getWidth());
return this;
}
/**
* Sets values for a absolute repositioning of the Element, on a specific
* page. Also has as a side effect that the Element's {@link
* Property#POSITION} is changed to {@link LayoutPosition#FIXED fixed}.
*
* @param pageNumber the page where the element must be positioned
* @param left horizontal position on the page
* @param bottom vertical position on the page
* @return this Element.
*/
public Image setFixedPosition(int pageNumber, float left, float bottom) {
setFixedPosition(pageNumber, left, bottom, getWidth());
return this;
}
/**
* Gets width of the image. It returns width of image or form XObject,
* not the width set by one of the #setWidth methods
*
* @return the original width of the image
*/
public float getImageWidth() {
return xObject.getWidth();
}
/**
* Gets height of the image. It returns height of image or form XObject,
* not the height set by one of the #setHeight methods
*
* @return the original height of the image
*/
public float getImageHeight() {
return xObject.getHeight();
}
/**
* Sets the height property of the image, measured in points.
*
* @param height a value measured in points.
* @return this image.
*/
public Image setHeight(float height) {
UnitValue heightAsUV = UnitValue.createPointValue(height);
setProperty(Property.HEIGHT, heightAsUV);
return (Image) (Object) this;
}
/**
* Sets the height property of the image with a {@link UnitValue}.
*
* @param height a value measured in points.
* @return this image.
*/
public Image setHeight(UnitValue height) {
setProperty(Property.HEIGHT, height);
return (Image) (Object) this;
}
/**
* Sets the max-height property of the image, measured in points.
*
* @param maxHeight a value measured in points.
* @return this image.
*/
public Image setMaxHeight(float maxHeight) {
UnitValue maxHeightAsUv = UnitValue.createPointValue(maxHeight);
setProperty(Property.MAX_HEIGHT, maxHeightAsUv);
return (Image) (Object) this;
}
/**
* Sets the max-height property of the image with a {@link UnitValue}.
*
* @param maxHeight a value measured in points.
* @return this image.
*/
public Image setMaxHeight(UnitValue maxHeight) {
setProperty(Property.MAX_HEIGHT, maxHeight);
return (Image) (Object) this;
}
/**
* Sets the min-height property of the image, measured in points.
*
* @param minHeight a value measured in points.
* @return this image.
*/
public Image setMinHeight(float minHeight) {
UnitValue minHeightAsUv = UnitValue.createPointValue(minHeight);
setProperty(Property.MIN_HEIGHT, minHeightAsUv);
return (Image) (Object) this;
}
/**
* Sets the min-height property of the image with a {@link UnitValue}.
*
* @param minHeight a value measured in points.
* @return this image.
*/
public Image setMinHeight(UnitValue minHeight) {
setProperty(Property.MIN_HEIGHT, minHeight);
return (Image) (Object) this;
}
/**
* Sets the max-width property of the image, measured in points.
*
* @param maxWidth a value measured in points.
* @return this image.
*/
public Image setMaxWidth(float maxWidth) {
UnitValue minHeightAsUv = UnitValue.createPointValue(maxWidth);
setProperty(Property.MAX_WIDTH, minHeightAsUv);
return (Image) (Object) this;
}
/**
* Sets the max-width property of the image with a {@link UnitValue}.
*
* @param maxWidth a value measured in points.
* @return this image.
*/
public Image setMaxWidth(UnitValue maxWidth) {
setProperty(Property.MAX_WIDTH, maxWidth);
return (Image) (Object) this;
}
/**
* Sets the min-width property of the image, measured in points.
*
* @param minWidth a value measured in points.
* @return this image.
*/
public Image setMinWidth(float minWidth) {
UnitValue minHeightAsUv = UnitValue.createPointValue(minWidth);
setProperty(Property.MIN_WIDTH, minHeightAsUv);
return (Image) (Object) this;
}
/**
* Sets the min-width property of the image with a {@link UnitValue}.
*
* @param minWidth a value measured in points.
* @return this image.
*/
public Image setMinWidth(UnitValue minWidth) {
setProperty(Property.MIN_WIDTH, minWidth);
return (Image) (Object) this;
}
/**
* Sets the width property of the image, measured in points.
*
* @param width a value measured in points.
* @return this image.
*/
public Image setWidth(float width) {
setProperty(Property.WIDTH, UnitValue.createPointValue(width));
return (Image) (Object) this;
}
/**
* Sets the width property of the image with a {@link UnitValue}.
*
* @param width a {@link UnitValue} object
* @return this image.
*/
public Image setWidth(UnitValue width) {
setProperty(Property.WIDTH, width);
return (Image) (Object) this;
}
/**
* Gets the width property of the image.
*
* @return the width of the element, with a value and a measurement unit.
* @see UnitValue
*/
public UnitValue getWidth() {
return (UnitValue) this.getProperty(Property.WIDTH);
}
/**
* Gets scaled width of the image.
*
* @return the current scaled width
*/
public float getImageScaledWidth() {
return null == this.getProperty(Property.HORIZONTAL_SCALING) ?
xObject.getWidth() :
xObject.getWidth() * (float) this.getProperty(Property.HORIZONTAL_SCALING);
}
/**
* Gets scaled height of the image.
*
* @return the current scaled height
*/
public float getImageScaledHeight() {
return null == this.getProperty(Property.VERTICAL_SCALING) ?
xObject.getHeight() :
xObject.getHeight() * (float) this.getProperty(Property.VERTICAL_SCALING);
}
/**
* Sets an object-fit mode for the image.
*
* @param objectFit is the {@link ObjectFit} mode
* @return this image
*/
public Image setObjectFit(ObjectFit objectFit) {
setProperty(Property.OBJECT_FIT, objectFit);
return this;
}
/**
* Retrieves the {@link ObjectFit} mode for the image.
*
* @return an object-fit mode for the image if it was set
* and default value {@link ObjectFit#FILL} otherwise
*/
public ObjectFit getObjectFit() {
if (hasProperty(Property.OBJECT_FIT)) {
return (ObjectFit) this.getProperty(Property.OBJECT_FIT);
} else {
return ObjectFit.FILL;
}
}
@Override
public AccessibilityProperties getAccessibilityProperties() {
if (tagProperties == null) {
tagProperties = new DefaultAccessibilityProperties(StandardRoles.FIGURE);
}
return tagProperties;
}
/**
* Give this element a neutral role. See also {@link AccessibilityProperties#setRole(String)}.
*
* @return this Element
*/
public Image setNeutralRole() {
this.getAccessibilityProperties().setRole(null);
return this;
}
@Override
protected IRenderer makeNewRenderer() {
return new ImageRenderer(this);
}
private static ImageData checkImageType(ImageData image) {
if (image instanceof WmfImageData) {
throw new PdfException(LayoutExceptionMessageConstant.CANNOT_CREATE_LAYOUT_IMAGE_BY_WMF_IMAGE);
}
return image;
}
}
