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Java-Gaming.org > Java Game APIs & Engines > Java 2D > displaying from a ByteBuffer
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Offline deepthought

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« on: 2011-11-27 12:32:17 »
i have some native code, which produces a bytebuffer with a raw 24 bit image.
what steps should i take to display this image?
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Offline ra4king

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« Reply #1 on: 2011-11-27 16:18:54 »
Create a BufferedImage and manually set each pixel.
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Online CaptainJester

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« Reply #2 on: 2011-11-28 06:26:50 »
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BufferedImage img = new BufferedImage(800, 600, BufferedImage.TYPE_3BYTE_BGR);
img.getRaster().setDataElements(0, 0, 800, 600, imageData);
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Offline counterp

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« Reply #3 on: 2011-11-28 07:27:05 »
I don't think you can pass a ByteBuffer along as an argument there (someone correct me?)

What I would do is use array() to get the backing buffer and work from there
Offline Riven
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« Reply #4 on: 2011-11-28 08:22:58 »
Quote from: counterp on 2011-11-28 07:27:05
I don't think you can pass a ByteBuffer along as an argument there (someone correct me?)

What I would do is use array() to get the backing buffer and work from there
deepthought said he got the ByteBuffer from native code, so it's a direct ByteBuffer. .array() won't work there.

You have to copy the contents of the ByteBuffer into an array manually, using byteBuffer.get(byte[])
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Offline ra4king

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« Reply #5 on: 2011-11-28 11:55:52 »
The argument is of type Object. The JavaDocs say that it should be an array of the type returned by Raster.getTransferType().
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Offline deepthought

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« Reply #6 on: 2011-11-28 15:28:18 »
Quote
BufferedImage img = new BufferedImage(800, 600, BufferedImage.TYPE_3BYTE_BGR);
img.getRaster().setDataElements(0, 0, 800, 600, imageData);

that works. and there i was arsing around with MemoryImageSources
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Offline ra4king

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« Reply #7 on: 2011-11-28 20:05:19 »
What type is your imageData?
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Offline deepthought

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« Reply #8 on: 2011-11-29 08:22:39 »
3 byte RGB. the native code could just be rewritten to use BGR.
just wondering, is there any way to make a 3 byte RGB colormodel?
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Offline ra4king

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« Reply #9 on: 2011-11-29 17:45:58 »
I meant what type of array?
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Offline deepthought

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« Reply #10 on: 2011-11-30 11:02:45 »
byte
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