Screen-space pixel bounds?

[kaphula]

Hi,

Is it possible to define rectangular bounds for a section in screen space pixels? There is a function called .with_bounds() but in my understanding it can be only used to define the bounds from the section's origin up to the direction of layout settings.

Let us say I want to have a dialog box somewhere on my screen and render text inside that dialog box. If I move the text with motion inside the dialog box so that it reaches the edge of the dialog box and goes beyond it, the text should be clipped to the borders of the dialog box. There is no way to achieve this with .with_bounds() for every possible direction inside the dialog box?

Since a brush draws all of its sections at once, I don't see how I could make use of render_pass.set_scissor_rect for individual sections of the brush without creating a custom brush for every individual area on the screen I want to clip, which sounds pretty bad.

I use render_pass.set_scissor_rect for my other own UI elements to get this clipping effect. I separate draw calls that use clipping and draw calls that don't. Draw calls that use clipping are sorted by the clipping area, and each draw call set first calls render_pass.set_scissor_rect and then "draws" its draw calls.

Any thoughts on this?

[Blatko1]

I have tried making it so multiple different text sections can be rendered through different draw calls in the same render pass, but sadly with no success (look #17). Because of how the dependency crate glyph_brush works, all text is meant to be rendered in one call each frame. Consequently, this crate is heavily restricted. You can try the glyphon crate which is probably more flexible than this crate.

[kaphula]

That is unfortunate. I will look around the implementations at some point. I guess the only way to go then is to implement some kind of boundary clipping system on glyph_brush side first, that is, if they are even willing to accept such features as PRs.