New new new backend part 3: converting the dummy backend

[yshui]

Based on #1236

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 50.00000% with 30 lines in your changes are missing coverage. Please review.

Project coverage is 37.38%. Comparing base (a3187d0) to head (edbb42f). Report is 1 commits behind head on next.

:exclamation: Current head edbb42f differs from pull request most recent head 5c897d7. Consider uploading reports for the commit 5c897d7 to get more accurate results

Additional details and impacted files

[](https://app.codecov.io/gh/yshui/picom/pull/1237?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yuxuan+Shui) ```diff @@ Coverage Diff @@ ## next #1237 +/- ## ========================================== + Coverage 36.53% 37.38% +0.85% ========================================== Files 55 55 Lines 12279 12283 +4 ========================================== + Hits 4486 4592 +106 + Misses 7793 7691 -102 ``` | [Files](https://app.codecov.io/gh/yshui/picom/pull/1237?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yuxuan+Shui) | Coverage Δ | | |---|---|---| | [src/backend/dummy/dummy.c](https://app.codecov.io/gh/yshui/picom/pull/1237?src=pr&el=tree&filepath=src%2Fbackend%2Fdummy%2Fdummy.c&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yuxuan+Shui#diff-c3JjL2JhY2tlbmQvZHVtbXkvZHVtbXkuYw==) | `63.54% <50.00%> (-1.40%)` | :arrow_down: | ... and [5 files with indirect coverage changes](https://app.codecov.io/gh/yshui/picom/pull/1237/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Yuxuan+Shui)