I'm using the C-calling convention so there is no constructor. Seeing as CD_IUP is an alias for cdContextIup and CD_NATIVEWINDOW is an alias for cdContextNativeWindow and they both have the same exact prototype, they should work exactly alike -- except they don't. Maybe the documentation is missing something or it is well hidden? It doesn't really matter since CD_IUP is portable and CD_NATIVEWINDOW is not and at this point in history I'm more interested in being portable, but issues are issues and they still need to be reported for feedback.
I took your suggestion and changed the font from Courier to Comic Sans MS and that seemed to work. I tried other fonts and the results varied. Arial was corrupt but not as bad as Courier. It seems that monospaced fonts are affected most (even Consolas) but proportional fonts are not. Microsoft doesn't appear to have acknowledged the issue, even though I see hints of it on their website, e.g. -- https://social.msdn.microsoft.com/Forums/vstudio/en-US/5ef2d2f7-5724-4abf-8252-54cec49eac88/quotcourier-newquot-font-visually-corrupted?forum=visualstudiogeneral. I turned off ClearType and that cleared things up so this is definitely a Microsoft feature ... uh, I mean bug. This is an issue that needs to be documented in IUP since Microsoft doesn't appear motivated to either acknowledge or repair the problem. Thanks, Andrew On 12/28/2021 at 10:46 AM, Antonio Scuri <antonio.sc...@gmail.com> wrote: NATIVEWINDOW is used by IUP, so you are actually using it. You may have some issues using its constructor, but you are using it. To replace the native Win32 driver by the OpenGL driver is not recommended, unless you need OpenGL support. You may try changing the font. Maybe Courier is not performing as expected at that small size. Text rendering in native Windows is usually good and better than the other drivers.Don't know exactly what's going on in that case. Best, Scuri Em ter., 28 de dez. de 2021 às 14:14, Andrew Robinson <arobinso...@cox.net> escreveu: I tried the other two drivers (NATIVEWINDOW and GL) and they don't work at all on Windows, so do you have any recommendations for a workaround or alternate? Thanks, Andrew On 2021-12-08 at 9:45 AM, Antonio Scuri <antonio.sc...@gmail.com> wrote: Ok So you are actually using the Win32 based driver. We use native functions to do the drawing. Text drawing is done by TextOut Win32 api function. Whe text orientation is used we simply use CreateFont with an angle parameter. So there isn't much I can do. Best, Scuri
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