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| (...) Hi Anders, I have not been able to gain access to the source. Do you have any suggestions on how to do it? Thanks, Kevin (20 years ago, 20-Sep-04, to lugnet.cad.dev)
| | | | | Re: LPub mask generation
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| (...) Both classes are in the TCFoundation directory: TCImage and TCPngImageFormat. To use them directly, you'll also need TCObject and TCAutoreleasePool. However, the only thing they use out of there that I know of is my reference counting stuff, (...) (20 years ago, 20-Sep-04, to lugnet.cad.dev, FTX)
| | | | | Re: LPub mask generation
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| (...) Hi Travis, I've downloaded LDview, and gotten libpng and zlib built under C++ Builder. What classes do you have for reading and writing PNG files based on libpng. I'd like to give them a look. Thanks, Kevin (20 years ago, 20-Sep-04, to lugnet.cad.dev)
| | | | | Re: LPub mask generation
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| (...) This project seems pretty old, but you've set me on the right track. PNG provides compression like JPG and no loss of image quality like BMP. Plus POV-Ray supports alpha channel with PNG. These three combined set me off on the task of (...) (20 years ago, 17-Sep-04, to lugnet.cad.dev)
| | | | | Re: LPub mask generation
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| (...) If you're interested, LDView has two C++ classes that together allow you to write a PNG via libpng. They have the advantage of being much easier to use that libpng itself. Take a look in the LDView source at TCImage.{h,cpp} and (...) (20 years ago, 16-Sep-04, to lugnet.cad.dev)
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| (...) I just upgraded to Borland C++ Builder 6, and there is a good PNG library for it. I'll use that and convert LPub over to use PNG (instead of BMP and JPG?). Alpha channel will be nice, allowing for semi-transparency. Kevin (20 years ago, 16-Sep-04, to lugnet.cad.dev)
| | | | | Re: LPub mask generation
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| (...) LPub is written in Borland C++ Builder, which is the C++ version of Delphi. The programing language is different, but the libraries are the same. I'd like Alpha channel, instead of binary bitmap, because it might provide some help with (...) (20 years ago, 16-Sep-04, to lugnet.cad.dev)
| | | | | Re: LPub mask generation
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| (...) LPub is written in Delphi, if I'm not misremembering? Have you looked at (URL) can't say I understand all of the code at a quick glance, but it looks like all you have to do is setting the Alpha channel to a suitable value for every pixel, and (...) (20 years ago, 16-Sep-04, to lugnet.cad.dev)
| | | | | Re: LPub mask generation
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| (...) Careful! A *Windows* color value uses the high bit to indicate that the rest is an index into the 'System Color Palette' and not a RGB value at all (In Delphi you have ColorToRGB() to get the RGB value from such a 'color'). I'm not at all sure (...) (20 years ago, 16-Sep-04, to lugnet.cad.dev)
| | | | | Re: LPub mask generation
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| (...) What about jpeg 2000? It seems to have some sort of support for alpha channels. Don (20 years ago, 16-Sep-04, to lugnet.cad.dev)
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