Commit 437f6b3d authored by Jonas Ådahl's avatar Jonas Ådahl

renderer-native: Actually use shadow fb when using software rendering

The commit 'renderer/native: Use shadow fb on software GL if preferred'
attempted to force using a shadow fb when using llvmpipe in order to
speed up blending, but instead only did so when llvmpipe AND the drm
device explicityl asked for it.

Now instead always force it for llvmpipe and other software rendering
backends, and otherwise just query the drm device (i.e.
DRM_CAP_DUMB_PREFER_SHADOW).

!807
parent 05e1a6c2
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