Comments on: JPEG 2000 for Pascal

By: Marek Mauder

Marek Mauder — Mon, 07 Jun 2010 10:03:15 +0000

I don’t have D7 to test it right now but you can create 32bit TBitmaps with it and alpha data should be accessible using ScanLine property (D7 just doesn’t support alpha blending when drawing the bitmap).

I’ll be adding crossplatform JPEG 2000 reader/writer to PasJpeg2000 package witch easier access to decoded pixels than in TBitmap descendant.

Meanwhile you could use Imaging library, PasJpeg2000 was originally part of it, and it also support creation of OpenGL textures (var Tex: GLuint := LoadGLTextureFromFile(‘tex.jp2′)).

By: resle

resle — Fri, 04 Jun 2010 06:58:31 +0000

A great effort, thank you very much.

A question: I am using Delphi 7 and reading Jpeg 2000 files as OpenGL textures. I see right now the way to extract raw pixel data would be assign() to a tbitmap and then extract data from there using ScanLines. Unluckily since Alpha isn’t supported in D7 Tbitmaps this pretty much nullifies the whole idea of using Jpeg 2000 as the format of choice.

So I wonder… is there some other way, perhaps, of extracting pixel data from TJpeg2000Bitmap in the form or R,G,B,A,R,G,B,A,R,G,B,A …. ? Thanks in advance,

andrea

By: Marek Mauder

Marek Mauder — Sun, 07 Mar 2010 16:12:39 +0000

It’s already updated, happened few weeks ago.

By: Gerald Schwerdtfeger

Gerald Schwerdtfeger — Tue, 02 Mar 2010 13:46:15 +0000

When will this happen ?

By: Marek Mauder

Marek Mauder — Wed, 03 Feb 2010 17:31:20 +0000

I’ll update this page with some info about compiling OpenJpeg in C++ Builder.

By: Gerald Schwerdtfeger

Gerald Schwerdtfeger — Wed, 03 Feb 2010 14:59:10 +0000

I will need to recompile the DLL. Does someone have the make file for the Delpji 2010 C compiler. Could it be posted somewhere ?

By: Gerald Schwerdtfeger

Gerald Schwerdtfeger — Mon, 01 Feb 2010 12:14:03 +0000

Hi Serge, could you provide some of your DICOM library for free or is it commercial ?

Regards
Gerald

By: Marek Mauder

Marek Mauder — Fri, 25 Sep 2009 11:38:01 +0000

Thanks. Btw, Viu 2 image viewer looks very nice.

By: Qin Hao

Qin Hao — Thu, 24 Sep 2009 08:36:29 +0000

You are great, man!

By: JPEG 2000 for Object Pascal-Delphi and FreePascal « PDF Hacks

JPEG 2000 for Object Pascal-Delphi and FreePascal « PDF Hacks — Wed, 09 Sep 2009 18:59:52 +0000

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By: Marek Mauder

Marek Mauder — Fri, 14 Aug 2009 15:27:14 +0000

Sorry don’t know about any free crossplatfrom native Pascal JPEG lossless library. Either paid, dll/binary linking, or something like that.

By: Serge

Serge — Thu, 06 Aug 2009 13:45:17 +0000

Hi, guys, thank you for your work. I’m using JPEG 2000 for Pascal
in my DICOM component, the first test shows that it works great.
Thanks. Did you meet a Jpeg Lossless software for delphi translated?

By: JPEG2000 for pascal | Venus Debris' Blog

JPEG2000 for pascal | Venus Debris' Blog — Thu, 09 Jul 2009 00:26:58 +0000

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