Drawing now takes the style and scale too, like measuring, so the text
drawers have no font state left. UIContext keeps its current style and
passes it, and fills it in from the theme if nothing has set one yet.
PPGe passes its one font.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Measuring took the current font and scale, so UIContext switched to the
style being measured and back. On first draw the font to switch back to
could be an empty one, which the UWP drawer asserts on.
MeasureString and MeasureStringRect now take the style and scale, and the
backends' MeasureStringInternal measures in the style it's given.
SetOrCreateFont, which sets the font drawing uses, is shared, and the
backends only implement EnsureFont, which creates a font if needed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Our Qt backend has long been left behind and doesn't even support Vulkan
currently. There would be a lot of work to make it viable, and I don't
think anyone is really interested.
ImGui on SDL will soon fulfill the need for a more classic user interface
with a menu bar on Linux, and on Mac we already have a native UI.
The D2D-based text renderer requires a D3D11 context, which confuses
RenderDoc (it doesn't permit multiple 3D APIs in the same process).
So, let's restore the old GDI renderer and use it if RenderDoc is attached.
See #21638
