david-vanderson/dvui

dx11: uv wrap

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#881 opened on May 26, 2026

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good first issue

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Description

Followup from #867

The dx11 backend doesn't wrap uv coords correctly. Reproduction:

  • load demo > Applets > uv_rect
  • the texture should fill the whole area, but is only rendering inside the border (which defines the limits of uv 0-1)

I think this is because the shaders don't sample the texture if the uv coords are outside 0-1.

Contributor guide

Research direction
Inspect the shader code in the DX11 backend that handles UV coordinates and ensure sampling outside 0-1 wraps correctly. The issue suggests the texture is only rendering inside the 0-1 range; check whether the shader uses a sampler with wrapping mode set to repeat or clamp.
Tech stack
zig
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitZigshader programming
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50