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https://issues.apache.org/jira/browse/PDFBOX-4974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17214096#comment-17214096
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Robert Fink edited comment on PDFBOX-4974 at 10/14/20, 5:51 PM:
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There is a method getUrl() but it returns null.
This is quite obvious cause the WriteableImage is not created from a specified
URL.
Instead it's created from a byte array.
To illustrate this here's the code:
{code:java}
// Image with red, green, blue bands
WritableImage writableImage = new WritableImage(width, height);
PixelWriter pixelWriter = writableImage.getPixelWriter();
PixelFormat<ByteBuffer> pixelFormat = PixelFormat.getByteRgbInstance();
int bandCount = 3;
int writableImageBufferSize = (width * height) * bandCount;
byte[] writableImageBuffer = new byte[writableImageBufferSize];
pixelWriter.setPixels(0, 0, width, height, pixelFormat, writableImageBuffer, 0,
width * bandCount);
{code}
{code:java}
// Image with blue, green, red and alpha bands
WritableImage writableImage = new WritableImage(width, height);
PixelWriter pixelWriter = writableImage.getPixelWriter();
PixelFormat<ByteBuffer> pixelFormat = PixelFormat.getByteBgraInstance();
int bandCount = 4;
int writableImageBufferBufferSize = (width * height) * bandCount;
byte[] writableImageBuffer = new byte[writableImageBufferBufferSize];
pixelWriter.setPixels(0, 0, width, height, pixelFormat, writableImageBuffer, 0,
width * bandCount);
{code}
The PixelFormat.getByteBgraInstance() is not ideal. There should be the
PixelFormat.getByteArgbInstance() too.
However I am on the mailing list of the JavaFX team to ask to implement such a
method.
was (Author: robertoni):
There is a method getUrl() but it returns null.
This is quite obvious cause the WriteableImage is not created from a specified
URL.
Instead it's created from a byte buffer.
To illustrate this here's the code:
{code:java}
// Image with red, green, blue bands
WritableImage writableImage = new WritableImage(width, height);
PixelWriter pixelWriter = writableImage.getPixelWriter();
PixelFormat<ByteBuffer> pixelFormat = PixelFormat.getByteRgbInstance();
int bandCount = 3;
int writableImageBufferSize = (width * height) * bandCount;
byte[] writableImageBuffer = new byte[writableImageBufferSize];
pixelWriter.setPixels(0, 0, width, height, pixelFormat, writableImageBuffer, 0,
width * bandCount);
{code}
{code:java}
// Image with blue, green, red and alpha bands
WritableImage writableImage = new WritableImage(width, height);
PixelWriter pixelWriter = writableImage.getPixelWriter();
PixelFormat<ByteBuffer> pixelFormat = PixelFormat.getByteBgraInstance();
int bandCount = 4;
int writableImageBufferBufferSize = (width * height) * bandCount;
byte[] writableImageBuffer = new byte[writableImageBufferBufferSize];
pixelWriter.setPixels(0, 0, width, height, pixelFormat, writableImageBuffer, 0,
width * bandCount);
{code}
The PixelFormat.getByteBgraInstance() is not ideal. There should be the
PixelFormat.getByteArgbInstance() too.
However I am on the mailing list of the JavaFX team to ask to implement such a
method.
> PDImageXObject based on WritableImage
> -------------------------------------
>
> Key: PDFBOX-4974
> URL: https://issues.apache.org/jira/browse/PDFBOX-4974
> Project: PDFBox
> Issue Type: New Feature
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Robert Fink
> Priority: Major
> Labels: javafx
>
> The goal is to work with a WritableImage from JavaFX in addition to a
> BufferedImage from Swing.
> My proposal for a new feature are the following.
> To extend the factory classes:
> - CCITTFactory by the method:
> createFromImage(PDDocument document, WritableImage image)
> - JPEGFactory by the methods:
> createFromImage(PDDocument document, WritableImage image)
> createFromImage(PDDocument document, WritableImage image, float quality)
> createFromImage(PDDocument document, WritableImage image, float quality, int
> dpi)
> - LosslessFactory by methods:
> createFromImage(PDDocument document, WritableImage image)
> To extend the PDImageXObject class:
> * by the methods:
> getWritableImage()
> getWritableImage(Rectangle region, int subsampling)
> Until now there is a need to use the class SwingFXUtils to do the conversion
> from WritableImage to BufferedImage or vice versa.
> This new feature should come in handy for all JavaFX developers.
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