fix(HCT): shows HCT background for invisible text

Background rendering is skipped for spans with an alpha value of 0.

Bug: 389137049
Flag: com.android.graphics.hwui.flags.high_contrast_text_small_text_rect
Test: atest core/tests/coretests/src/android/text/LayoutTest.java
Change-Id: I5e9a08653c10f6688a27d0ac9943e0f3c5413d86

parent 107fe807

core/java/android/text/Layout.java

+6 −0

Original line number	Diff line number	Diff line
		@@ -1021,6 +1021,12 @@ public abstract class Layout {
		return;
		}

		if (!mSpannedText \|\| mSpanColors == null) {
		if (mPaint.getAlpha() == 0) {
		return;
		}
		}

		var padding = Math.max(HIGH_CONTRAST_TEXT_BORDER_WIDTH_MIN_PX,
		mPaint.getTextSize() * HIGH_CONTRAST_TEXT_BORDER_WIDTH_FACTOR);
		var cornerRadius = mPaint.density * HIGH_CONTRAST_TEXT_BACKGROUND_CORNER_RADIUS_DP;