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Commit 64803940 authored by Leon Scroggins III's avatar Leon Scroggins III
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Update documentation for DISPLAY_DECORATION 

After some discussion, we've decided to always set the ScreenDecorations
to DISPLAY_DECORATION. HWC can decide, based on the format, whether to
truly treat it as DISPLAY_DECORATION, or to change to DEVICE
composition.

Update the documentation to reflect this change.

See also I1da3199bacf5877e88876249c60c0a33fcd44c1e.

Bug: 193170859
Test: NA
Change-Id: I1fae74b360d1b9d79fc4afeab6f71089d4c8b7e5
parent 1d6b83f1

graphics/composer/aidl/android/hardware/graphics/composer3/Composition.aidl

+10 −6
Original line number Diff line number Diff line
@@ -74,16 +74,20 @@ enum Composition { 
     */

    SIDEBAND = 5,

    /**

     * A display decoration layer contains a buffer which is an 8 bit

     * alpha mask. Pixels in the mask with an alpha of 0 (transparent) will

     * show the content underneath, and pixels with an alpha of 255 will be

     * be rendered in black. An alpha in between will show the content

     * blended with black. This is useful, for example, to provide

     * A display decoration layer contains a buffer which is used to provide

     * anti-aliasing on the cutout region/rounded corners on the top and

     * bottom of a display.

     *

     * Pixels in the buffer with an alpha of 0 (transparent) will show the

     * content underneath, and pixels with an alpha of 255 will be rendered in

     * black. An alpha in between will show the underlying content blended with

     * black.

     *

     * Some devices may support this flag with a buffer containing an 8 bit

     * alpha mask.

     *

     * Upon validateDisplay, the device may request a change from this type

     * to CLIENT.

     * to either DEVICE or CLIENT.

     */

    DISPLAY_DECORATION = 6,

}