Reduce the number of Font instance creation (de6d4442) · Commits · e / os / android_frameworks_base

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

+59 −67

Original line number	Diff line number	Diff line
		@@ -34,66 +34,60 @@ 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 DEFAULT_FONT_CACHE_MAX_ENTRIES = 10
		/** Caches for font interpolation */
		interface FontCache {
		val animationFrameCount: Int

		/** Provide interpolation of two fonts by adjusting font variation settings. */
		class FontInterpolator(
		numberOfAnimationSteps: Int? = null,
		) {
		/**
		* Cache key for the interpolated font.
		*
		* This class is mutable for recycling.
		*/
		private data class InterpKey(var l: Font?, var r: Font?, var progress: Float) {
		fun set(l: Font, r: Font, progress: Float) {
		this.l = l
		this.r = r
		this.progress = progress
		}
		fun get(key: InterpKey): Font?

		fun get(key: VarFontKey): Font?

		fun put(key: InterpKey, font: Font)

		fun put(key: VarFontKey, font: Font)
		}

		/**
		* Cache key for the font that has variable font.
		*
		* This class is mutable for recycling.
		*/
		private data class VarFontKey(
		var sourceId: Int,
		var index: Int,
		val sortedAxes: MutableList<FontVariationAxis>
		) {
		/** Cache key for the interpolated font. */
		data class InterpKey(val start: Font?, val end: Font?, val frame: Int)

		/** Cache key for the font that has variable font. */
		data class VarFontKey(val sourceId: Int, val index: Int, val sortedAxes: List<FontVariationAxis>) {
		constructor(
		font: Font,
		axes: List<FontVariationAxis>
		) : this(
		font.sourceIdentifier,
		font.ttcIndex,
		axes.toMutableList().apply { sortBy { it.tag } }
		)

		fun set(font: Font, axes: List<FontVariationAxis>) {
		sourceId = font.sourceIdentifier
		index = font.ttcIndex
		sortedAxes.clear()
		sortedAxes.addAll(axes)
		sortedAxes.sortBy { it.tag }
		}
		axes: List<FontVariationAxis>,
		) : this(font.sourceIdentifier, font.ttcIndex, axes.sortedBy { it.tag })
		}

		class FontCacheImpl(override val animationFrameCount: Int = DEFAULT_FONT_CACHE_MAX_ENTRIES / 2) :
		FontCache {
		// 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.
		val cacheMaxEntries = numberOfAnimationSteps?.let { it * 2 } ?: DEFAULT_FONT_CACHE_MAX_ENTRIES
		val cacheMaxEntries = animationFrameCount * 2
		private val interpCache = LruCache<InterpKey, Font>(cacheMaxEntries)
		private val verFontCache = LruCache<VarFontKey, Font>(cacheMaxEntries)

		// Mutable keys for recycling.
		private val tmpInterpKey = InterpKey(null, null, 0f)
		private val tmpVarFontKey = VarFontKey(0, 0, mutableListOf())
		override fun get(key: InterpKey): Font? = interpCache[key]

		override fun get(key: VarFontKey): Font? = verFontCache[key]

		override fun put(key: InterpKey, font: Font) {
		interpCache.put(key, font)
		}

		override fun put(key: VarFontKey, font: Font) {
		verFontCache.put(key, font)
		}

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

		/** Provide interpolation of two fonts by adjusting font variation settings. */
		class FontInterpolator(val fontCache: FontCache = FontCacheImpl()) {
		/** Linear interpolate the font variation settings. */
		fun lerp(start: Font, end: Font, progress: Float): Font {
		if (progress == 0f) {
		@@ -111,13 +105,12 @@ class FontInterpolator(

		// Check we already know the result. This is commonly happens since we draws the different
		// text chunks with the same font.
		tmpInterpKey.set(start, end, progress)
		val cachedFont = interpCache[tmpInterpKey]
		if (cachedFont != null) {
		val iKey = InterpKey(start, end, (progress * fontCache.animationFrameCount).toInt())
		fontCache.get(iKey)?.let {
		if (DEBUG) {
		Log.d(LOG_TAG, "[$progress] Interp. cache hit for $tmpInterpKey")
		Log.d(LOG_TAG, "[$progress] Interp. cache hit for $iKey")
		}
		return cachedFont
		return it
		}

		// General axes interpolation takes O(N log N), this is came from sorting the axes. Usually
		@@ -131,14 +124,14 @@ class FontInterpolator(
		MathUtils.lerp(
		startValue ?: FONT_WEIGHT_DEFAULT_VALUE,
		endValue ?: FONT_WEIGHT_DEFAULT_VALUE,
		progress
		progress,
		)
		TAG_ITAL ->
		adjustItalic(
		MathUtils.lerp(
		startValue ?: FONT_ITALIC_DEFAULT_VALUE,
		endValue ?: FONT_ITALIC_DEFAULT_VALUE,
		progress
		progress,
		)
		)
		else -> {
		@@ -152,32 +145,31 @@ class FontInterpolator(

		// Check if we already make font for this axes. This is typically happens if the animation
		// happens backward.
		tmpVarFontKey.set(start, newAxes)
		val axesCachedFont = verFontCache[tmpVarFontKey]
		if (axesCachedFont != null) {
		interpCache.put(InterpKey(start, end, progress), axesCachedFont)
		val vKey = VarFontKey(start, newAxes)
		fontCache.get(vKey)?.let {
		fontCache.put(iKey, it)
		if (DEBUG) {
		Log.d(LOG_TAG, "[$progress] Axis cache hit for $tmpVarFontKey")
		Log.d(LOG_TAG, "[$progress] Axis cache hit for $vKey")
		}
		return axesCachedFont
		return it
		}

		// This is the first time to make the font for the axes. Build and store it to the cache.
		// 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.put(InterpKey(start, end, progress), newFont)
		verFontCache.put(VarFontKey(start, newAxes), newFont)
		fontCache.put(iKey, newFont)
		fontCache.put(vKey, newFont)

		// Cache misses are likely to create memory leaks, so this is logged at error level.
		Log.e(LOG_TAG, "[$progress] Cache MISS for $tmpInterpKey / $tmpVarFontKey")
		Log.e(LOG_TAG, "[$progress] Cache MISS for $iKey / $vKey")
		return newFont
		}

		private fun lerp(
		start: Array<FontVariationAxis>,
		end: Array<FontVariationAxis>,
		filter: (tag: String, left: Float?, right: Float?) -> Float
		filter: (tag: String, left: Float?, right: Float?) -> Float,
		): List<FontVariationAxis> {
		// Safe to modify result of Font#getAxes since it returns cloned object.
		start.sortBy { axis -> axis.tag }

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

+9 −13

Original line number	Diff line number	Diff line
		@@ -35,6 +35,8 @@ private const val TYPEFACE_CACHE_MAX_ENTRIES = 5
		typealias GlyphCallback = (TextAnimator.PositionedGlyph, Float) -> Unit

		interface TypefaceVariantCache {
		val fontCache: FontCache
		val animationFrameCount: Int
		fun getTypefaceForVariant(fvar: String?): Typeface?

		companion object {
		@@ -57,8 +59,10 @@ interface TypefaceVariantCache {

		class TypefaceVariantCacheImpl(
		var baseTypeface: Typeface,
		override val animationFrameCount: Int,
		) : TypefaceVariantCache {
		private val cache = LruCache<String, Typeface>(TYPEFACE_CACHE_MAX_ENTRIES)
		override val fontCache = FontCacheImpl(animationFrameCount)
		override fun getTypefaceForVariant(fvar: String?): Typeface? {
		if (fvar == null) {
		return baseTypeface
		@@ -100,25 +104,17 @@ class TypefaceVariantCacheImpl(
		*/
		class TextAnimator(
		layout: Layout,
		numberOfAnimationSteps: Int? = null, // Only do this number of discrete animation steps.
		private val invalidateCallback: () -> Unit,
		private val typefaceCache: TypefaceVariantCache,
		private val invalidateCallback: () -> Unit = {},
		) {
		var typefaceCache: TypefaceVariantCache = TypefaceVariantCacheImpl(layout.paint.typeface)
		get() = field
		set(value) {
		field = value
		textInterpolator.typefaceCache = value
		}

		// Following two members are for mutable for testing purposes.
		public var textInterpolator: TextInterpolator =
		TextInterpolator(layout, typefaceCache, numberOfAnimationSteps)
		public var animator: ValueAnimator =
		public var textInterpolator = TextInterpolator(layout, typefaceCache)
		public var animator =
		ValueAnimator.ofFloat(1f).apply {
		duration = DEFAULT_ANIMATION_DURATION
		addUpdateListener {
		textInterpolator.progress =
		calculateProgress(it.animatedValue as Float, numberOfAnimationSteps)
		calculateProgress(it.animatedValue as Float, typefaceCache.animationFrameCount)
		invalidateCallback()
		}
		addListener(

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

+12 −12

Original line number	Diff line number	Diff line
		@@ -28,11 +28,7 @@ import com.android.internal.graphics.ColorUtils
		import java.lang.Math.max

		/** Provide text style linear interpolation for plain text. */
		class TextInterpolator(
		layout: Layout,
		var typefaceCache: TypefaceVariantCache,
		numberOfAnimationSteps: Int? = null,
		) {
		class TextInterpolator(layout: Layout, var typefaceCache: TypefaceVariantCache) {
		/**
		* Returns base paint used for interpolation.
		*
		@@ -66,7 +62,7 @@ class TextInterpolator(
		val start: Int, // inclusive
		val end: Int, // exclusive
		var baseFont: Font,
		var targetFont: Font
		var targetFont: Font,
		) {
		val length: Int
		get() = end - start
		@@ -79,14 +75,14 @@ class TextInterpolator(
		val baseY: FloatArray, // same length as glyphIds
		val targetX: FloatArray, // same length as glyphIds
		val targetY: FloatArray, // same length as glyphIds
		val fontRuns: List<FontRun>
		val fontRuns: List<FontRun>,
		)

		/** A class represents text layout of a single line. */
		private class Line(val runs: List<Run>)

		private var lines = listOf<Line>()
		private val fontInterpolator = FontInterpolator(numberOfAnimationSteps)
		private val fontInterpolator = FontInterpolator(typefaceCache.fontCache)

		// Recycling object for glyph drawing and tweaking.
		private val tmpPaint = TextPaint()
		@@ -343,12 +339,16 @@ class TextInterpolator(
		private class MutablePositionedGlyph : TextAnimator.PositionedGlyph() {
		override var runStart: Int = 0
		public set

		override var runLength: Int = 0
		public set

		override var glyphIndex: Int = 0
		public set

		override lateinit var font: Font
		public set

		override var glyphId: Int = 0
		public set
		}
		@@ -401,7 +401,7 @@ class TextInterpolator(
		0,
		i - prevStart,
		font,
		tmpPaintForGlyph
		tmpPaintForGlyph,
		)
		prevStart = i
		arrayIndex = 0
		@@ -418,13 +418,13 @@ class TextInterpolator(
		0,
		run.end - prevStart,
		font,
		tmpPaintForGlyph
		tmpPaintForGlyph,
		)
		}

		private fun updatePositionsAndFonts(
		layoutResult: List<List<PositionedGlyphs>>,
		updateBase: Boolean
		updateBase: Boolean,
		) {
		// Update target positions with newly calculated text layout.
		check(layoutResult.size == lines.size) { "The new layout result has different line count." }
		@@ -507,7 +507,7 @@ class TextInterpolator(
		lineStart,
		count,
		layout.textDirectionHeuristic,
		paint
		paint,
		) { _, _, glyphs, _ ->
		runs.add(glyphs)
		}

packages/SystemUI/customization/src/com/android/systemui/shared/clocks/AnimatableClockView.kt

+3 −1

Original line number	Diff line number	Diff line
		@@ -34,6 +34,7 @@ import com.android.app.animation.Interpolators
		import com.android.internal.annotations.VisibleForTesting
		import com.android.systemui.animation.GlyphCallback
		import com.android.systemui.animation.TextAnimator
		import com.android.systemui.animation.TypefaceVariantCacheImpl
		import com.android.systemui.customization.R
		import com.android.systemui.log.core.LogLevel
		import com.android.systemui.log.core.LogcatOnlyMessageBuffer
		@@ -98,7 +99,8 @@ constructor(

		@VisibleForTesting
		var textAnimatorFactory: (Layout, () -> Unit) -> TextAnimator = { layout, invalidateCb ->
		TextAnimator(layout, NUM_CLOCK_FONT_ANIMATION_STEPS, invalidateCb)
		val cache = TypefaceVariantCacheImpl(layout.paint.typeface, NUM_CLOCK_FONT_ANIMATION_STEPS)
		TextAnimator(layout, cache, invalidateCb)
		}

		// Used by screenshot tests to provide stability

packages/SystemUI/customization/src/com/android/systemui/shared/clocks/ClockAnimation.kt

deleted100644 → 0

+0 −21

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2024 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.systemui.shared.clocks

		object ClockAnimation {
		const val NUM_CLOCK_FONT_ANIMATION_STEPS = 30
		}