mirror of https://gitlab.freedesktop.org/mesa/mesa
b52fbf7185
RRGetScreenInfo re-probes connector status, which may result in an EDID transfer for every output, which according to Adam Jackson can be on the order of 100ms for a single EDID block. So our previous implementation of this eglGetMscRateANGLE was blocking for excessive periods of time instead of being a quick query of the refresh rate like users expect. This changes our eglGetMscRateANGLE implementation from using RRGetScreenInfo to RRGetScreenResourcesCurrent and RRGetCrtcInfo. This obtains the same monitor info without re-probing connectors. Fixes a severe performance regression in Chromium WebGL performance. While we're re-implementing the extension, we also implement proper multi-monitor support: if there are multiple active CRTCs, we determine which contains the largest portion of the surface, as specified in the EGL_ANGLE_sync_control_rate extension. We also now report fractional refresh rates correctly rather than rounding to the nearest Hz. Fixes: |
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