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memononen / nanovg

Antialiased 2D vector drawing library on top of OpenGL for UI and visualizations.
zlib License
5.15k stars 771 forks source link

No text at all in a GUI (Zyn-Fusion) #549

Open ghost opened 4 years ago

ghost commented 4 years ago

This is not necessarily a bug report, but rather to see if some further help could be provided.

In https://github.com/zynaddsubfx/zyn-fusion-issues/issues/151, I reported about a text display issue with Zyn-Fusion. Suggestion by the author of that program is that there might be an issue with the 'font atlas' in nanovg, which is used by that program.

Would there be some idea how to fix this problem?

memononen commented 4 years ago

NanoVG uses fontstash for font rendering, can you test the fontstash example to see if you get similar problem: https://github.com/memononen/fontstash

It uses premake too, so same procedure to run the example as with nanovg.

--mikko

On Fri, Oct 18, 2019 at 10:51 PM Oliver notifications@github.com wrote:

This is not necessarily a bug report, but rather to see if some further help could be provided.

In zynaddsubfx/zyn-fusion-issues#151 https://github.com/zynaddsubfx/zyn-fusion-issues/issues/151, I reported about a text display issue with Zyn-Fusion. Suggestion by the author of that program is that there might be an issue with the 'font atlas' in nanovg, which is used by that program.

Would there be some idea how to fix this problem?

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ghost commented 4 years ago

Thanks for the suggestion, but the result when running the compiled example is identical to https://github.com/memononen/fontstash/blob/master/screenshots/screen-01.png?raw=true.

memononen commented 4 years ago

Yep, that's how it should look like. I was trying to see if we could replicate the problem with simpler setup.

I have to say, I have no idea what might cause your problem. NanoVG demo slowing down seems very odd. The error you get on console means that one of the draw commands is doing "invalid operation". It can mean many things. It could be buggy opengl driver, bug in nanovg, or zyn-fusion using the api unexpected way. Sorry, I cant be more helpful this time.

On Sun, Oct 20, 2019 at 10:39 AM Oliver notifications@github.com wrote:

Thanks for the suggestion, but the result when running the compiled example is identical to https://github.com/memononen/fontstash/blob/master/screenshots/screen-01.png?raw=true .

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/memononen/nanovg/issues/549?email_source=notifications&email_token=ABIBXSFVQ67CSIEZATU6B3LQPQDLBA5CNFSM4JCLTLQKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEBYELUY#issuecomment-544228819, or unsubscribe https://github.com/notifications/unsubscribe-auth/ABIBXSBFCAW2SXMMAOP75M3QPQDLBANCNFSM4JCLTLQA .