Anti aliased graphics
lazarus / 39-Graphics

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strider · 2017-08-24 22:09

I've got a requirement to create fairly complex diagrams - and
wondered what the best classes to use are. I've seen the use of Canvas
with forms, but the objects drawn dont seem to be aliased (smoothed).
What's the best way to draw higher quality diagrams ? I'm fairly new
to Lazarus, but used other tools extinsively. Thanks!

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dot.not · 2017-08-24 22:22

Is the diagram you want something like the attached picture at the end
of this post?

Quote from: SolarPop on August 24, 2017, 05:38:54 pm(click on quote
header to go to the post)
If yes then SolarPop is your source of info I guess, I never even seen
what control does that

I hope this helps

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Graeme · 2017-08-24 22:40

Quote from: dot.not on August 25, 2017, 12:22:53 amIs the diagram you
want something like the attached picture at the end of this post?

The screenshot in that linked forum thread doesn't use anti-aliased
rendering. Look at the jaggered edges of diagonal lines.

This is anti-aliased, sub-pixel high accuracy rendering:
   http://fpgui.sourceforge.net/images/full/fpgui_agg-powered.png

It was created using AggPas included in the fpGUI code repository
(src/corelib/render/software/). AggPas can be used independently from
fpGUI (eg: console or web apps on a headless server) and 100%
implemented in Object Pascal. My copy of AggPas in also still being
maintained, unlike the original or the copy included with Lazarus.

Regards,
  Graeme

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Graeme · 2017-08-24 22:41

Quote from: strider on August 25, 2017, 12:09:26 amWhat's the best way
to draw higher quality diagrams ?
Use AggPas instead. See my other reply for a sample screenshot and
more details.

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RAW · 2017-08-24 23:15

If you need semitransparent pixels and antialiasing then you can
really use a lot...

1. BGRABitmap
2. Graphics32
3. VampyreImagingLibrary
4. AggPas+Lazarus or AggPas+fpGUI
5. GDI+
6. Direct2D (GPU)
7. OpenGL (GPU)
8. CrossCodebotLibrary

I guess these are the most famous possibilities... happy trial and
error...

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strider · 2017-08-29 16:45

Thanks for all the replies. Plenty for me to look through there.