org.apache.poi.hemf.record.emf

Class HemfFill.EmfAlphaBlend

java.lang.Object

org.apache.poi.hemf.record.emf.HemfFill.EmfAlphaBlend

All Implemented Interfaces:

GenericRecord, HemfRecord

Enclosing class:

HemfFill

public static class HemfFill.EmfAlphaBlend
extends java.lang.Object
implements HemfRecord

Field Summary

Fields

Modifier and Type	Field and Description
protected byte	alphaFormat A byte that specifies how source and destination pixels are interpreted with respect to alpha transparency.
protected HwmfBitmapDib	bitmap
protected HwmfColorRef	bkColorSrc the background color of the source bitmap.
protected byte	blendFlags This value MUST be 0x00 and MUST be ignored.
protected byte	blendOperation The blend operation code.
protected java.awt.geom.Rectangle2D	bounds the destination bounding rectangle in device units
protected java.awt.geom.Rectangle2D	destRect the destination rectangle
protected int	srcConstantAlpha An 8-bit unsigned integer that specifies alpha transparency, which determines the blend of the source and destination bitmaps.
protected java.awt.geom.Rectangle2D	srcRect the source rectangle
protected HwmfFill.ColorUsage	usageSrc A 32-bit unsigned integer that specifies how to interpret values in the color table in the source bitmap header.
protected java.awt.geom.AffineTransform	xFormSrc a world-space to page-space transform to apply to the source bitmap.

Constructor Summary

Constructors

Constructor and Description
EmfAlphaBlend()

Method Summary

Modifier and Type	Method and Description
HemfRecordType	getEmfRecordType()
java.util.Map<java.lang.String,java.util.function.Supplier<?>>	getGenericProperties()
long	init(LittleEndianInputStream leis, long recordSize, long recordId) Init record from stream

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.poi.hemf.record.emf.HemfRecord

calcBounds, draw, getGenericRecordType, setHeader

Methods inherited from interface org.apache.poi.common.usermodel.GenericRecord

getGenericChildren

Field Detail

bounds

protected final java.awt.geom.Rectangle2D bounds

the destination bounding rectangle in device units

destRect

protected final java.awt.geom.Rectangle2D destRect

the destination rectangle

srcRect

protected final java.awt.geom.Rectangle2D srcRect

the source rectangle

blendOperation

protected byte blendOperation

The blend operation code. The only source and destination blend operation that has been defined is 0x00, which specifies that the source bitmap MUST be combined with the destination bitmap based on the alpha transparency values of the source pixels.

blendFlags

protected byte blendFlags

This value MUST be 0x00 and MUST be ignored.

srcConstantAlpha

protected int srcConstantAlpha

An 8-bit unsigned integer that specifies alpha transparency, which determines the blend of the source and destination bitmaps. This value MUST be used on the entire source bitmap. The minimum alpha transparency value, zero, corresponds to completely transparent; the maximum value, 0xFF, corresponds to completely opaque. In effect, a value of 0xFF specifies that the per-pixel alpha values determine the blend of the source and destination bitmaps.

alphaFormat

protected byte alphaFormat

A byte that specifies how source and destination pixels are interpreted with respect to alpha transparency. 0x00: The pixels in the source bitmap do not specify alpha transparency. In this case, the SrcConstantAlpha value determines the blend of the source and destination bitmaps. Note that in the following equations SrcConstantAlpha is divided by 255, which produces a value in the range 0 to 1. 0x01: "AC_SRC_ALPHA" Indicates that the source bitmap is 32 bits-per-pixel and specifies an alpha transparency value for each pixel.

xFormSrc

protected final java.awt.geom.AffineTransform xFormSrc

a world-space to page-space transform to apply to the source bitmap.

bkColorSrc

protected final HwmfColorRef bkColorSrc

the background color of the source bitmap.

usageSrc

protected HwmfFill.ColorUsage usageSrc

A 32-bit unsigned integer that specifies how to interpret values in the color table in the source bitmap header.

bitmap

protected final HwmfBitmapDib bitmap

Constructor Detail

EmfAlphaBlend

public EmfAlphaBlend()

Method Detail

getEmfRecordType

public HemfRecordType getEmfRecordType()

Specified by:

getEmfRecordType in interface HemfRecord

init

public long init(LittleEndianInputStream leis,
                 long recordSize,
                 long recordId)
          throws java.io.IOException

Description copied from interface: HemfRecord

Init record from stream

Specified by:

init in interface HemfRecord

Parameters:

leis - the little endian input stream

recordSize - the size limit for this record

recordId - the id of the HemfRecordType

Returns:

count of processed bytes

Throws:

java.io.IOException - when the inputstream is malformed

getGenericProperties

public java.util.Map<java.lang.String,java.util.function.Supplier<?>> getGenericProperties()

Specified by:

getGenericProperties in interface GenericRecord