Bug#1077178: gtk4: reftest failure in label-shadows.ui when using softpipe

[Simon McVittie]

Control: retitle -1 gtk4: reftest failure in label-shadows.ui when using softpipe

On Fri, 26 Jul 2024 at 14:38:33 +0100, Simon McVittie wrote:
> On Fri, 26 Jul 2024 at 14:18:53 +0200, Matthias Geiger wrote:
> > 604/668 gtk:reftest / reftest label-shadows.ui  fails because there is a
> > (imo) minor diff
> 
> According to #1077181 the same thing happens on riscv64. This might be
> to do with llvmpipe being problematic on those two architectures.

I can reproduce this on another architecture (armel) by forcing use of
GALLIUM_DRIVER=softpipe, so it seems this is a rendering difference
between llvmpipe (good) and softpipe (bad).

For riscv64, we can revisit this when a hopefully-fixed llvm-toolchain-18
has finished compiling, at which point we might be able to use llvmpipe.

For mips64el, I don't know what the outlook is.

    smcv