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José
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 Posted: Sun Feb 18, 2007 9:10 am Post subject: Overlapping two pictures |
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I can display images with TImage->Picture->LoadFromFile(). However, I
have some pictures which are partly transparent, and I want to display
them on top of each other. Can this be done?
--
José |
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Clayton Arends
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| Posted: Mon Feb 19, 2007 9:10 am Post subject: Re: Overlapping two pictures |
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Yes. Image controls are non-windowed and so use their parent's canvas when
drawing. You need to set the parent of each image to the same parent (the
form, a panel, etc). If your pictures are BMPs then you will need to set
the 'Transparent' property of the image to true. Other file types (like GIF
and PNG) handle their own transparency.
- Clayton |
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José
Guest
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| Posted: Mon Feb 19, 2007 9:05 pm Post subject: Re: Overlapping two pictures |
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On Sun, 18 Feb 2007 19:52:55 -0800, "Clayton Arends"
<nospam_claytonarends (AT) hotmail (DOT) com> wrote in
borland.public.cppbuilder.graphics:
| Quote: | I can display images with TImage->Picture->LoadFromFile(). However, I
have some pictures which are partly transparent, and I want to display
them on top of each other. Can this be done?
Yes. Image controls are non-windowed and so use their parent's canvas when
drawing. You need to set the parent of each image to the same parent (the
form, a panel, etc). If your pictures are BMPs then you will need to set
the 'Transparent' property of the image to true. Other file types (like GIF
and PNG) handle their own transparency.
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Sorry, that doesn't work.
My pictures come as PNG, but LoadFromFile will not read that format.
GIF isn't accepted either.
I can convert the pictures to BMP or JPG, but this destroys the
transparency. Even if I set the Transparent property to true, I need a
way to tell what part of the picture should be transparent.
--
José |
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Remy Lebeau (TeamB)
Guest
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| Posted: Wed Feb 21, 2007 12:31 am Post subject: Re: Overlapping two pictures |
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"José" <jose (AT) 127 (DOT) 0.0.1> wrote in message
news:4uejt2tp0h227i6pbp1rnc4nqj1c88ouc9 (AT) 4ax (DOT) com...
| Quote: | My pictures come as PNG, but LoadFromFile will not read
that format. GIF isn't accepted either.
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LoadFromFile() will accept those formats if you have
TGraphic-descendant classes registered for them. There are several
third-party implementations available for that, such as:
PNG Delphi
http://pngdelphi.sourceforge.net
TGIFImage
http://www.torry.net/vcl/graphics/gif/gifimage.exe
Gambit |
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