Supply extra brightness parameters to RenderEngine
A future CL will update the HLG->SDR tonemapping algorithm to consider
current display brightness, as recommended by BT2100.
In preparation for this:
* Fix an issue where maxLuminance was using the current display
brightness if supplied from DisplayManager instead of the max luminance
* Add currentDisplayBrightnessNits to the RenderEngine interface to
support the current brightness
* Plumb current display brightness all the way to libtonemap, where
nothing uses it (yet)
Bug: 206035964
Test: libcompositionengine_test
Change-Id: I3e9f0fdb23fbb08c50e4733e5a16bcd20948d750
diff --git a/services/surfaceflinger/CompositionEngine/src/Output.cpp b/services/surfaceflinger/CompositionEngine/src/Output.cpp
index 192ee04..162d84e 100644
--- a/services/surfaceflinger/CompositionEngine/src/Output.cpp
+++ b/services/surfaceflinger/CompositionEngine/src/Output.cpp
@@ -1059,9 +1059,11 @@
// If we have a valid current display brightness use that, otherwise fall back to the
// display's max desired
- clientCompositionDisplay.maxLuminance = outputState.displayBrightnessNits > 0.f
+ clientCompositionDisplay.currentLuminanceNits = outputState.displayBrightnessNits > 0.f
? outputState.displayBrightnessNits
: mDisplayColorProfile->getHdrCapabilities().getDesiredMaxLuminance();
+ clientCompositionDisplay.maxLuminance =
+ mDisplayColorProfile->getHdrCapabilities().getDesiredMaxLuminance();
clientCompositionDisplay.targetLuminanceNits = outputState.clientTargetWhitePointNits;
// Compute the global color transform matrix.