Revert "rhi: gl: Maintain Qt 5 compat wrt disk cache behavior"HEADdev

This reverts commit 38279dea558b06cef6c1d345962df3063fd12c5b.

Causes endless complaints about old GPUs (e.g. PowerVR) on Android and
embedded Linux.

Qt 6.8.2 restored the Qt 5 behavior of writing program binaries to files
every time a GL shader program is linked. That is in addition to the Qt
6 pipeline cache, which writes out all collected program binaries once
in one go, when the QQuickWindow is closing.

The Qt 6 abstractions are modeled after the VkPipelineCache-style
system, meaning no way to query and write out individual
program/pipleline binaries, just an ever-growing blob containing
everything encountered so far, which we then want to do rarely due to
the potential cost and the size of the blob, so e.g. when the Quick
scene is shutting down.

Before 6.8.2, Qt 6 did the logical thing and disabled the Qt 5 legacy GL
disk cache code path, since we do not need two caches concurrently. From
6.8.2 on, when running with OpenGL, there are now two parallel disk
caches. Because the Qt 5 style one works even if the application is
killed. Which is unexpectedly common on mobile/embedded.

Pick-to: 6.10 6.9 6.8
Fixes: QTBUG-133904
Fixes: QTBUG-134245
Fixes: QTBUG-134089
Fixes: QTBUG-135411
Fixes: QTBUG-134496
Fixes: QTBUG-135810
Change-Id: Icbd880898941195fcbc2da544e1599867c6d5f51
Reviewed-by: Eskil Abrahamsen Blomfeldt <[email protected]>

0 files changed, 0 insertions, 0 deletions