Merge "Restrict maximum size of FontInterpolator font caches" into udc-dev (9b6540c9) · Commits · e / os / android_frameworks_base

packages/SystemUI/animation/src/com/android/systemui/animation/FontInterpolator.kt

+11 −5

Original line number	Diff line number	Diff line
		@@ -18,8 +18,10 @@ package com.android.systemui.animation

		import android.graphics.fonts.Font
		import android.graphics.fonts.FontVariationAxis
		import android.util.LruCache
		import android.util.MathUtils
		import android.util.MathUtils.abs
		import androidx.annotation.VisibleForTesting
		import java.lang.Float.max
		import java.lang.Float.min

		@@ -34,6 +36,10 @@ private const val FONT_ITALIC_MIN = 0f
		private const val FONT_ITALIC_ANIMATION_STEP = 0.1f
		private const val FONT_ITALIC_DEFAULT_VALUE = 0f

		// Benchmarked via Perfetto, difference between 10 and 50 entries is about 0.3ms in
		// frame draw time on a Pixel 6.
		@VisibleForTesting const val FONT_CACHE_MAX_ENTRIES = 10

		/** Provide interpolation of two fonts by adjusting font variation settings. */
		class FontInterpolator {

		@@ -81,8 +87,8 @@ class FontInterpolator {
		// Font interpolator has two level caches: one for input and one for font with different
		// variation settings. No synchronization is needed since FontInterpolator is not designed to be
		// thread-safe and can be used only on UI thread.
		private val interpCache = hashMapOf<InterpKey, Font>()
		private val verFontCache = hashMapOf<VarFontKey, Font>()
		private val interpCache = LruCache<InterpKey, Font>(FONT_CACHE_MAX_ENTRIES)
		private val verFontCache = LruCache<VarFontKey, Font>(FONT_CACHE_MAX_ENTRIES)

		// Mutable keys for recycling.
		private val tmpInterpKey = InterpKey(null, null, 0f)
		@@ -152,7 +158,7 @@ class FontInterpolator {
		tmpVarFontKey.set(start, newAxes)
		val axesCachedFont = verFontCache[tmpVarFontKey]
		if (axesCachedFont != null) {
		interpCache[InterpKey(start, end, progress)] = axesCachedFont
		interpCache.put(InterpKey(start, end, progress), axesCachedFont)
		return axesCachedFont
		}

		@@ -160,8 +166,8 @@ class FontInterpolator {
		// Font.Builder#build won't throw IOException since creating fonts from existing fonts will
		// not do any IO work.
		val newFont = Font.Builder(start).setFontVariationSettings(newAxes.toTypedArray()).build()
		interpCache[InterpKey(start, end, progress)] = newFont
		verFontCache[VarFontKey(start, newAxes)] = newFont
		interpCache.put(InterpKey(start, end, progress), newFont)
		verFontCache.put(VarFontKey(start, newAxes), newFont)
		return newFont
		}

packages/SystemUI/animation/src/com/android/systemui/animation/TextAnimator.kt

+7 −5

Original line number	Diff line number	Diff line
		@@ -24,8 +24,10 @@ import android.graphics.Canvas
		import android.graphics.Typeface
		import android.graphics.fonts.Font
		import android.text.Layout
		import android.util.LruCache

		private const val DEFAULT_ANIMATION_DURATION: Long = 300
		private const val TYPEFACE_CACHE_MAX_ENTRIES = 5

		typealias GlyphCallback = (TextAnimator.PositionedGlyph, Float) -> Unit
		/**
		@@ -114,7 +116,7 @@ class TextAnimator(layout: Layout, private val invalidateCallback: () -> Unit) {

		private val fontVariationUtils = FontVariationUtils()

		private val typefaceCache = HashMap<String, Typeface?>()
		private val typefaceCache = LruCache<String, Typeface>(TYPEFACE_CACHE_MAX_ENTRIES)

		fun updateLayout(layout: Layout) {
		textInterpolator.layout = layout
		@@ -218,11 +220,11 @@ class TextAnimator(layout: Layout, private val invalidateCallback: () -> Unit) {
		}

		if (!fvar.isNullOrBlank()) {
		textInterpolator.targetPaint.typeface =
		typefaceCache.getOrElse(fvar) {
		textInterpolator.targetPaint.typeface = typefaceCache.get(fvar) ?: run {
		textInterpolator.targetPaint.fontVariationSettings = fvar
		textInterpolator.targetPaint.typeface?.also {
		typefaceCache.put(fvar, textInterpolator.targetPaint.typeface)
		textInterpolator.targetPaint.typeface
		}
		}
		}

packages/SystemUI/tests/src/com/android/systemui/animation/FontInterpolatorTest.kt

+25 −0

Original line number	Diff line number	Diff line
		@@ -106,4 +106,29 @@ class FontInterpolatorTest : SysuiTestCase() {
		val reversedFont = interp.lerp(endFont, startFont, 0.5f)
		assertThat(resultFont).isSameInstanceAs(reversedFont)
		}

		@Test
		fun testCacheMaxSize() {
		val interp = FontInterpolator()

		val startFont = Font.Builder(sFont)
		.setFontVariationSettings("'wght' 100")
		.build()
		val endFont = Font.Builder(sFont)
		.setFontVariationSettings("'wght' 1")
		.build()
		val resultFont = interp.lerp(startFont, endFont, 0.5f)
		for (i in 0..FONT_CACHE_MAX_ENTRIES + 1) {
		val f1 = Font.Builder(sFont)
		.setFontVariationSettings("'wght' ${i * 100}")
		.build()
		val f2 = Font.Builder(sFont)
		.setFontVariationSettings("'wght' $i")
		.build()
		interp.lerp(f1, f2, 0.5f)
		}

		val cachedFont = interp.lerp(startFont, endFont, 0.5f)
		assertThat(resultFont).isNotSameInstanceAs(cachedFont)
		}
		}