Provide a fixed transform hint if the layer is in a fixed orientation 1/2
The transform hint is used to prevent allocating a buffer of a
different size when a layer is rotated. The producer can choose to
consume the hint and allocate the buffer with the same size.
Provide the graphic producer a transform hint if the layer and its
children are in an orientation different from the display's
orientation. The caller is responsible for clearing this transform
hint if the layer is no longer in a fixed orientation.
Bug: 152919661
Test: atest VulkanPreTransformTest
Test: confirm with winscope trace, buffers are allocated taking into
account the transform hint in fixed orientation scenarios
Test: go/wm-smoke
Change-Id: Iea9dcf909921802a5be5c44dd61be3274f36bbd8
diff --git a/libs/gui/LayerState.cpp b/libs/gui/LayerState.cpp
index f7158d0..e43446a 100644
--- a/libs/gui/LayerState.cpp
+++ b/libs/gui/LayerState.cpp
@@ -116,6 +116,7 @@
output.writeInt32(frameRateSelectionPriority);
output.writeFloat(frameRate);
output.writeByte(frameRateCompatibility);
+ output.writeUint32(fixedTransformHint);
return NO_ERROR;
}
@@ -198,6 +199,7 @@
frameRateSelectionPriority = input.readInt32();
frameRate = input.readFloat();
frameRateCompatibility = input.readByte();
+ fixedTransformHint = static_cast<ui::Transform::RotationFlags>(input.readUint32());
return NO_ERROR;
}
@@ -433,6 +435,10 @@
frameRate = other.frameRate;
frameRateCompatibility = other.frameRateCompatibility;
}
+ if (other.what & eFixedTransformHintChanged) {
+ what |= eFixedTransformHintChanged;
+ fixedTransformHint = other.fixedTransformHint;
+ }
if ((other.what & what) != other.what) {
ALOGE("Unmerged SurfaceComposer Transaction properties. LayerState::merge needs updating? "
"other.what=0x%" PRIu64 " what=0x%" PRIu64,