Provide a way to configure Skia's DirectContext GPU Resource Cache size (#1095)

Fixes:
[CMP-8916](https://youtrack.jetbrains.com/issue/CMP-8916/Provide-a-way-to-configure-Skias-DirectContext-GPU-Resource-Cache-size)

The cache can be limited on Desktop platforms by specifying
`-Dskiko.gpu.resourceCacheLimit` VM property (accepts numbers optionally
suffixed with "K", "M" or "G").

skiko/src/awtMain/kotlin/org/jetbrains/skiko/SkiaLayer.awt.kt

@@ -28,7 +28,7 @@ import kotlin.math.floor
 
 actual open class SkiaLayer internal constructor(
     externalAccessibleFactory: ((Component) -> Accessible)? = null,
-    private val properties: SkiaLayerProperties,
+    val properties: SkiaLayerProperties,
     private val renderFactory: RenderFactory = RenderFactory.Default,
     private val analytics: SkiaLayerAnalytics = SkiaLayerAnalytics.Empty,
     actual val pixelGeometry: PixelGeometry = PixelGeometry.UNKNOWN,

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/AngleContextHandler.kt

@@ -2,29 +2,15 @@ package org.jetbrains.skiko.context
 
 import org.jetbrains.skia.*
 import org.jetbrains.skiko.AngleApi
-import org.jetbrains.skiko.Logger
 import org.jetbrains.skiko.RenderException
 import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.redrawer.AngleRedrawer
 
-internal class AngleContextHandler(layer: SkiaLayer) : JvmContextHandler(layer) {
+internal class AngleContextHandler(layer: SkiaLayer) : ContextBasedContextHandler(layer, "ANGLE") {
     private val angleRedrawer: AngleRedrawer
         get() = layer.redrawer!! as AngleRedrawer
 
-    override fun initContext(): Boolean {
-        try {
-            if (context == null) {
-                context = angleRedrawer.makeContext()
-                if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
-                    Logger.info { "Renderer info:\n ${rendererInfo()}" }
-                }
-            }
-        } catch (e: Exception) {
-            Logger.warn(e) { "Failed to create Skia ANGLE context!" }
-            return false
-        }
-        return true
-    }
+    override fun makeContext() = angleRedrawer.makeContext()
 
     private var currentWidth = 0
     private var currentHeight = 0

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/ContextBasedContextHandler.kt

+package org.jetbrains.skiko.context
+
+import org.jetbrains.skia.DirectContext
+import org.jetbrains.skiko.Logger
+import org.jetbrains.skiko.SkiaLayer
+
+internal abstract class ContextBasedContextHandler(layer: SkiaLayer, val name: String) : JvmContextHandler(layer) {
+
+    abstract protected fun makeContext(): DirectContext
+
+    override fun initContext(): Boolean {
+        try {
+            if (context == null) {
+                context = makeContext()
+                onContextInitialized()
+            }
+        } catch (e: Exception) {
+            Logger.warn(e) { "Failed to create Skia $name context!" }
+            return false
+        }
+        return true
+    }
+}
\ No newline at end of file

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/ContextFreeContextHandler.kt

+package org.jetbrains.skiko.context
+
+import org.jetbrains.skiko.SkiaLayer
+
+internal abstract class ContextFreeContextHandler(layer: SkiaLayer) : JvmContextHandler(layer) {
+    private var isInited = false
+
+    override fun initContext(): Boolean {
+        if (!isInited) {
+            isInited = true
+            onContextInitialized()
+        }
+        return isInited
+    }
+}
\ No newline at end of file

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/Direct3DContextHandler.kt

 package org.jetbrains.skiko.context
 
+import org.jetbrains.skia.DirectContext
 import org.jetbrains.skia.Surface
 import org.jetbrains.skia.SurfaceProps
 import org.jetbrains.skia.impl.getPtr
@@ -8,7 +9,7 @@ import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.redrawer.Direct3DRedrawer
 import java.lang.ref.Reference
 
-internal class Direct3DContextHandler(layer: SkiaLayer) : JvmContextHandler(layer) {
+internal class Direct3DContextHandler(layer: SkiaLayer) : ContextBasedContextHandler(layer, "Direct3D") {
     private val bufferCount = 2
     private var surfaces: Array<Surface?> = arrayOfNulls(bufferCount)
     private fun isSurfacesNull() = surfaces.all { it == null }
@@ -16,20 +17,7 @@ internal class Direct3DContextHandler(layer: SkiaLayer) : JvmContextHandler(laye
     private val directXRedrawer: Direct3DRedrawer
         get() = layer.redrawer!! as Direct3DRedrawer
 
-    override fun initContext(): Boolean {
-        try {
-            if (context == null) {
-                context = directXRedrawer.makeContext()
-                if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
-                    Logger.info { "Renderer info:\n ${rendererInfo()}" }
-                }
-            }
-        } catch (e: Exception) {
-            Logger.warn(e) { "Failed to create Skia Direct3D context!" }
-            return false
-        }
-        return true
-    }
+    override fun makeContext(): DirectContext = directXRedrawer.makeContext()
 
     private var currentWidth = 0
     private var currentHeight = 0

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/DirectSoftwareContextHandler.kt

 package org.jetbrains.skiko.context
 
 import org.jetbrains.skia.impl.getPtr
-import org.jetbrains.skiko.Logger
 import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.redrawer.AbstractDirectSoftwareRedrawer
 import java.lang.ref.Reference
 
-internal class DirectSoftwareContextHandler(layer: SkiaLayer) : JvmContextHandler(layer) {
-    var isInited = false
-
+internal class DirectSoftwareContextHandler(layer: SkiaLayer) : ContextFreeContextHandler(layer) {
     private val softwareRedrawer: AbstractDirectSoftwareRedrawer
         get() = layer.redrawer!! as AbstractDirectSoftwareRedrawer
 
@@ -23,16 +20,6 @@ internal class DirectSoftwareContextHandler(layer: SkiaLayer) : JvmContextHandle
         return false
     }
 
-    override fun initContext(): Boolean {
-        if (!isInited) {
-            if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
-                Logger.info { "Renderer info:\n ${rendererInfo()}" }
-            }
-            isInited = true
-        }
-        return isInited
-    }
-
     override fun initCanvas() {
         val scale = layer.contentScale
         val w = (layer.width * scale).toInt().coerceAtLeast(0)

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/JvmContextHandler.kt

 package org.jetbrains.skiko.context
 
+import org.jetbrains.skiko.Logger
 import org.jetbrains.skiko.SkiaLayer
 
-internal abstract class JvmContextHandler(layer: SkiaLayer) : ContextHandler(layer, layer::draw)
\ No newline at end of file
+internal abstract class JvmContextHandler(layer: SkiaLayer) : ContextHandler(layer, layer::draw) {
+    protected fun onContextInitialized() {
+        if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
+            Logger.info { "Renderer info:\n ${rendererInfo()}" }
+        }
+        context?.run {
+            val gpuResourceCacheLimit = layer.properties.gpuResourceCacheLimit
+            if (gpuResourceCacheLimit >= 0) {
+                resourceCacheLimit = gpuResourceCacheLimit
+            }
+        }
+    }
+}

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/MetalContextHandler.kt

@@ -19,22 +19,7 @@ internal class MetalContextHandler(
     layer: SkiaLayer,
     private val device: MetalDevice,
     private val adapter: MetalAdapter
-) : JvmContextHandler(layer) {
-    override fun initContext(): Boolean {
-        try {
-            if (context == null) {
-                context = makeContext()
-                if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
-                    Logger.info { "Renderer info:\n ${rendererInfo()}" }
-                }
-            }
-        } catch (e: Exception) {
-            Logger.warn(e) { "Failed to create Skia Metal context!" }
-            return false
-        }
-        return true
-    }
-
+) : ContextBasedContextHandler(layer, "Metal") {
     override fun initCanvas() {
         disposeCanvas()
 
@@ -79,7 +64,7 @@ internal class MetalContextHandler(
         makeMetalRenderTarget(device.ptr, width, height)
     )
 
-    private fun makeContext() = DirectContext(
+    override fun makeContext() = DirectContext(
         makeMetalContext(device.ptr)
     )
 

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/OpenGLContextHandler.kt

@@ -3,21 +3,9 @@ package org.jetbrains.skiko.context
 import org.jetbrains.skia.*
 import org.jetbrains.skiko.*
 
-internal class OpenGLContextHandler(layer: SkiaLayer) : JvmContextHandler(layer) {
-    override fun initContext(): Boolean {
-        try {
-            if (context == null) {
-                context = makeGLContext()
-                if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
-                    Logger.info { "Renderer info:\n ${rendererInfo()}" }
-                }
-            }
-        } catch (e: Exception) {
-            Logger.warn(e) { "Failed to create Skia OpenGL context!" }
-            return false
-        }
-        return true
-    }
+internal class OpenGLContextHandler(layer: SkiaLayer) : ContextBasedContextHandler(layer, "OpenGL") {
+
+    override fun makeContext() = makeGLContext()
 
     private var currentWidth = 0
     private var currentHeight = 0

skiko/src/awtMain/kotlin/org/jetbrains/skiko/context/SoftwareContextHandler.kt

 package org.jetbrains.skiko.context
 
 import org.jetbrains.skia.*
-import org.jetbrains.skiko.Logger
 import org.jetbrains.skiko.OS
 import org.jetbrains.skiko.SkiaLayer
 import org.jetbrains.skiko.hostOs
@@ -10,7 +9,7 @@ import java.awt.Transparency
 import java.awt.color.ColorSpace
 import java.awt.image.*
 
-internal class SoftwareContextHandler(layer: SkiaLayer) : JvmContextHandler(layer) {
+internal class SoftwareContextHandler(layer: SkiaLayer) : ContextFreeContextHandler(layer) {
     override fun isTransparentBackground(): Boolean {
         // TODO: why Software rendering has another transparency logic from the begginning
         return hostOs == OS.MacOS && layer.transparency
@@ -27,18 +26,6 @@ internal class SoftwareContextHandler(layer: SkiaLayer) : JvmContextHandler(laye
     var image: BufferedImage? = null
     var imageData: ByteArray? = null
     var raster: WritableRaster? = null
-    var isInited = false
-
-    override fun initContext(): Boolean {
-        // Raster does not need context
-        if (!isInited) {
-            if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
-                Logger.info { "Renderer info:\n ${rendererInfo()}" }
-            }
-            isInited = true
-        }
-        return isInited
-    }
 
     override fun initCanvas() {
         disposeCanvas()

skiko/src/awtMain/kotlin/org/jetbrains/skiko/swing/Direct3DSwingRedrawer.kt

@@ -45,7 +45,7 @@ internal class Direct3DSwingRedrawer(
     private var bytesToDraw = ByteArray(0)
 
     init {
-        onContextInit()
+        onContextInit(context)
     }
 
     override fun dispose() {

skiko/src/awtMain/kotlin/org/jetbrains/skiko/swing/LinuxOpenGLSwingRedrawer.kt

@@ -29,7 +29,7 @@ internal class LinuxOpenGLSwingRedrawer(
     private var bytesToDraw = ByteArray(0)
 
     init {
-        onContextInit()
+        onContextInit(null)
     }
 
     override fun dispose() {
@@ -65,7 +65,7 @@ internal class LinuxOpenGLSwingRedrawer(
                 ).autoClose()
 
                 // TODO: may be it is possible to reuse [makeGLContext]
-                val directContext = makeGLContext().autoClose()
+                val directContext = makeGLContext().configureContext().autoClose()
                 val surface = Surface.makeFromBackendRenderTarget(
                     directContext,
                     renderTarget,

skiko/src/awtMain/kotlin/org/jetbrains/skiko/swing/MetalSwingRedrawer.kt

@@ -42,7 +42,7 @@ internal class MetalSwingRedrawer(
     private var texturePtr: Long = 0
 
     init {
-        onContextInit()
+        onContextInit(context)
     }
 
     private val painter: SwingPainter = createSwingPainter(swingLayerProperties)

skiko/src/awtMain/kotlin/org/jetbrains/skiko/swing/SkiaSwingLayer.kt

@@ -63,6 +63,8 @@ open class SkiaSwingLayer(
             get() = this@SkiaSwingLayer.graphicsConfiguration
         override val adapterPriority: GpuPriority
             get() = this@SkiaSwingLayer.properties.adapterPriority
+        override val gpuResourceCacheLimit: Long
+            get() = this@SkiaSwingLayer.properties.gpuResourceCacheLimit
     }
 
     private val redrawerManager = RedrawerManager<SwingRedrawer>(

skiko/src/awtMain/kotlin/org/jetbrains/skiko/swing/SoftwareSwingRedrawer.kt

@@ -33,7 +33,7 @@ internal class SoftwareSwingRedrawer(
     private val storage = Bitmap()
 
     init {
-        onContextInit()
+        onContextInit(null)
     }
 
     override fun dispose() {

skiko/src/awtMain/kotlin/org/jetbrains/skiko/swing/SwingLayerProperties.kt

@@ -11,6 +11,8 @@ internal interface SwingLayerProperties {
     val graphicsConfiguration: GraphicsConfiguration
 
     val adapterPriority: GpuPriority
+
+    val gpuResourceCacheLimit: Long
 }
 
 internal val SwingLayerProperties.scale: Float get() = graphicsConfiguration.defaultTransform.scaleX.toFloat()
\ No newline at end of file

skiko/src/awtMain/kotlin/org/jetbrains/skiko/swing/SwingRedrawerBase.kt

@@ -68,15 +68,24 @@ internal abstract class SwingRedrawerBase(
                 "OS: ${hostOs.id} ${hostArch.id}\n"
     }
 
-    protected fun onContextInit() {
+    protected fun onContextInit(context: DirectContext?) {
         require(!isDisposed) { "$javaClass is disposed" }
         requireNotNull(deviceAnalytics) { "deviceAnalytics is not null. Call onDeviceChosen after choosing the drawing device" }
         if (System.getProperty("skiko.hardwareInfo.enabled") == "true") {
             Logger.info { "Renderer info:\n ${rendererInfo()}" }
         }
+        context?.configureContext()
         deviceAnalytics?.contextInit()
     }
 
+    protected fun DirectContext.configureContext(
+        gpuResourceCacheLimit: Long = swingLayerProperties.gpuResourceCacheLimit
+    ): DirectContext = apply {
+        if (gpuResourceCacheLimit >= 0) {
+            resourceCacheLimit = gpuResourceCacheLimit
+        }
+    }
+
     private inline fun inDrawScope(body: () -> Unit) {
         check(SwingUtilities.isEventDispatchThread()) { "Method should be called from AWT event dispatch thread" }
         requireNotNull(deviceAnalytics) { "deviceAnalytics is not null. Call onDeviceChosen after choosing the drawing device" }

skiko/src/commonMain/kotlin/org/jetbrains/skia/DirectContext.kt

@@ -127,6 +127,28 @@ class DirectContext internal constructor(ptr: NativePointer) : RefCnt(ptr) {
             reachabilityBarrier(this)
         }
     }
+
+    /**
+     * GPU resource cache limit. If the cache currently exceeds this limit,
+     * it will be purged (LRU) to keep the cache within the limit.
+     */
+    var resourceCacheLimit: Long
+        get() {
+            try {
+                Stats.onNativeCall()
+                return DirectContext_nGetResourceCacheLimit(_ptr)
+            } finally {
+                reachabilityBarrier(this)
+            }
+        }
+        set(value) {
+            try {
+                Stats.onNativeCall()
+                DirectContext_nSetResourceCacheLimit(_ptr, value)
+            } finally {
+                reachabilityBarrier(this)
+            }
+        }
 }
 
 fun <R> DirectContext.useContext(block: (ctx: DirectContext) -> R): R = use {
@@ -139,6 +161,12 @@ private external fun DirectContext_nFlush(ptr: NativePointer, surfacePtr: Native
 @ExternalSymbolName("org_jetbrains_skia_DirectContext__1nFlushDefault")
 private external fun DirectContext_nFlushDefault(ptr: NativePointer)
 
+@ExternalSymbolName("org_jetbrains_skia_DirectContext__1nGetResourceCacheLimit")
+private external fun DirectContext_nGetResourceCacheLimit(ptr: NativePointer): Long
+
+@ExternalSymbolName("org_jetbrains_skia_DirectContext__1nSetResourceCacheLimit")
+private external fun DirectContext_nSetResourceCacheLimit(ptr: NativePointer, maxResourceBytes: Long)
+
 @ExternalSymbolName("org_jetbrains_skia_DirectContext__1nMakeGL")
 private external fun _nMakeGL(): NativePointer
 

skiko/src/commonTest/kotlin/org/jetbrains/skia/DirectContextTest.kt

+package org.jetbrains.skia
+
+import org.jetbrains.skiko.tests.TestGlContext
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class DirectContextNativeTest {
+
+    @Test
+    fun resourceCacheLimitTest() {
+        if (!TestGlContext.isAvailabale()) return
+
+        TestGlContext.run {
+            DirectContext.makeGL().useContext { context ->
+                context.resourceCacheLimit = 1024
+                assertEquals(1024, context.resourceCacheLimit)
+            }
+        }
+    }
+}
\ No newline at end of file

skiko/src/commonTest/kotlin/org/jetbrains/skia/SurfaceTest.kt

@@ -2,12 +2,6 @@ package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.interopScope
 import org.jetbrains.skia.impl.use
-import org.jetbrains.skiko.Arch
-import org.jetbrains.skiko.KotlinBackend
-import org.jetbrains.skiko.OS
-import org.jetbrains.skiko.hostArch
-import org.jetbrains.skiko.hostOs
-import org.jetbrains.skiko.kotlinBackend
 import org.jetbrains.skiko.tests.TestGlContext
 import org.jetbrains.skiko.tests.allocateBytesForPixels
 import org.jetbrains.skiko.tests.runTest
@@ -111,14 +105,7 @@ class SurfaceTest {
 
     @Test
     fun canMakeRenderTarget() {
-        if (hostOs != OS.Linux || kotlinBackend != KotlinBackend.Native) {
-            // TODO implement for other platforms and render targets
-            return
-        }
-        if (hostArch == Arch.Arm64) {
-            // TODO implement and test EGL on arm64
-            return
-        }
+        if (!TestGlContext.isAvailabale()) return
 
         val pixels = TestGlContext.run {
             DirectContext.makeGL().useContext { ctx ->

skiko/src/commonTest/kotlin/org/jetbrains/skiko/tests/TestHelpers.kt

@@ -2,6 +2,12 @@ package org.jetbrains.skiko.tests
 
 import org.jetbrains.skia.*
 import org.jetbrains.skia.impl.*
+import org.jetbrains.skiko.Arch
+import org.jetbrains.skiko.KotlinBackend
+import org.jetbrains.skiko.OS
+import org.jetbrains.skiko.hostArch
+import org.jetbrains.skiko.hostOs
+import org.jetbrains.skiko.kotlinBackend
 
 internal class TestGlContext : Managed(TestGlContext_nCreate(), FinalizerHolder.PTR) {
     private object FinalizerHolder {
@@ -17,7 +23,21 @@ internal class TestGlContext : Managed(TestGlContext_nCreate(), FinalizerHolder.
     }
 
     companion object {
+
+        fun isAvailabale(): Boolean {
+            if (hostOs != OS.Linux || kotlinBackend != KotlinBackend.Native) {
+                // TODO implement for other platforms and render targets
+                return false
+            }
+            if (hostArch == Arch.Arm64) {
+                // TODO implement and test EGL on arm64
+                return false
+            }
+            return true
+        }
+
         inline fun <T> run(block: TestGlContext.() -> T): T {
+           check(isAvailabale()) { "TestGlContext is not available" }
            return TestGlContext().use {
                 it.makeCurrent()
                 val result = it.block()

skiko/src/jvmMain/cpp/common/DirectContext.cc

@@ -62,6 +62,18 @@ extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_DirectContextKt_Direct
     context->flush(skSurface);
 }
 
+extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_DirectContextKt_DirectContext_1nGetResourceCacheLimit
+  (JNIEnv* env, jclass jclass, jlong ptr) {
+     GrDirectContext* context = reinterpret_cast<GrDirectContext*>(static_cast<uintptr_t>(ptr));
+     return (jlong) context->getResourceCacheLimit();
+}
+
+extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_DirectContextKt_DirectContext_1nSetResourceCacheLimit
+  (JNIEnv* env, jclass jclass, jlong ptr, jlong maxResourceBytes) {
+    GrDirectContext* context = reinterpret_cast<GrDirectContext*>(static_cast<uintptr_t>(ptr));
+    context->setResourceCacheLimit((size_t) maxResourceBytes);
+}
+
 GrSyncCpu grSyncCpuFromBool(bool syncCpu) {
   if (syncCpu) return GrSyncCpu::kYes;
   return GrSyncCpu::kNo;

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/SkiaLayerProperties.kt

@@ -21,6 +21,7 @@ class SkiaLayerProperties(
     val frameBuffering: FrameBuffering = SkikoProperties.frameBuffering,
     val renderApi: GraphicsApi = SkikoProperties.renderApi,
     val adapterPriority: GpuPriority = SkikoProperties.gpuPriority,
+    val gpuResourceCacheLimit: Long = SkikoProperties.gpuResourceCacheLimit
 ) {
     override fun equals(other: Any?): Boolean {
         if (this === other) return true

skiko/src/jvmMain/kotlin/org/jetbrains/skiko/SkikoProperties.kt

@@ -87,6 +87,22 @@ object SkikoProperties {
 
     val macOsOpenGLEnabled: Boolean get() = getProperty("skiko.macos.opengl.enabled")?.toBoolean() ?: false
 
+    val gpuResourceCacheLimit: Long get() = parseSize(getProperty("skiko.gpu.resourceCacheLimit"))
+
+    private fun parseSize(size: String?): Long {
+        if (size == null) return -1L
+        val size = size.uppercase()
+        val multiplier = when {
+            size.endsWith("K") -> 1024L
+            size.endsWith("M") -> 1024L * 1024L
+            size.endsWith("G") -> 1024L * 1024L * 1024L
+            else -> 1L
+        }
+        val numericPart = if (multiplier != 1L) size.substring(0, size.length - 1) else size
+        return numericPart.toLongOrNull()?.times(multiplier)
+            ?: throw IllegalArgumentException("Invalid size format: $size")
+    }
+
     private val properties = run {
         val resourcePropertiesEnabled = System.getProperty("skiko.resource.properties.enabled")?.toBoolean() ?: false
         val resources = if (resourcePropertiesEnabled) {
@@ -101,33 +117,37 @@ object SkikoProperties {
     private fun getProperty(key: String): String? = properties.getProperty(key)
 
     internal fun parseRenderApi(text: String?): GraphicsApi {
-        when(text) {
+        when (text) {
             "SOFTWARE_COMPAT" -> return GraphicsApi.SOFTWARE_COMPAT
             "SOFTWARE_FAST", "DIRECT_SOFTWARE" -> return GraphicsApi.SOFTWARE_FAST
             "SOFTWARE" -> return if (hostOs == OS.MacOS) GraphicsApi.SOFTWARE_COMPAT else GraphicsApi.SOFTWARE_FAST
             "OPENGL" -> {
                 // Skia isn't properly tested on OpenGL and Windows ARM (https://groups.google.com/g/skia-discuss/c/McoclAhLpvg?pli=1)
                 return if (hostOs != OS.Windows || hostArch != Arch.Arm64) GraphicsApi.OPENGL
-                    else throw Exception("$hostOs-$hostArch does not support OpenGL rendering API.")
+                else throw Exception("$hostOs-$hostArch does not support OpenGL rendering API.")
             }
+
             "ANGLE" -> {
                 return if (hostOs == OS.Windows) GraphicsApi.ANGLE
-                    else throw Exception("$hostOs does not support ANGLE rendering API.")
+                else throw Exception("$hostOs does not support ANGLE rendering API.")
             }
+
             "DIRECT3D" -> {
                 return if (hostOs == OS.Windows) GraphicsApi.DIRECT3D
-                    else throw Exception("$hostOs does not support DirectX rendering API.")
+                else throw Exception("$hostOs does not support DirectX rendering API.")
             }
+
             "METAL" -> {
                 return if (hostOs == OS.MacOS) GraphicsApi.METAL
-                    else throw Exception("$hostOs does not support Metal rendering API.")
+                else throw Exception("$hostOs does not support Metal rendering API.")
             }
+
             else -> return bestRenderApiForCurrentOS()
         }
     }
 
     private fun bestRenderApiForCurrentOS(): GraphicsApi {
-        return when(hostOs) {
+        return when (hostOs) {
             OS.MacOS -> GraphicsApi.METAL
             OS.Linux -> GraphicsApi.OPENGL
             OS.Windows -> if (renderingAngleEnabled) GraphicsApi.ANGLE else GraphicsApi.DIRECT3D
@@ -136,15 +156,28 @@ object SkikoProperties {
         }
     }
 
-    internal fun fallbackRenderApiQueue(initialApi: GraphicsApi) : List<GraphicsApi> {
+    internal fun fallbackRenderApiQueue(initialApi: GraphicsApi): List<GraphicsApi> {
         var fallbackApis = when (hostOs) {
             OS.Linux -> listOf(GraphicsApi.OPENGL, GraphicsApi.SOFTWARE_FAST, GraphicsApi.SOFTWARE_COMPAT)
             OS.MacOS -> listOf(GraphicsApi.METAL, GraphicsApi.SOFTWARE_COMPAT)
             OS.Windows -> when (hostArch) {
                 // Skia isn't properly tested on OpenGL and Windows ARM (https://groups.google.com/g/skia-discuss/c/McoclAhLpvg?pli=1)
-                Arch.Arm64 -> listOf(GraphicsApi.ANGLE, GraphicsApi.DIRECT3D, GraphicsApi.SOFTWARE_FAST, GraphicsApi.SOFTWARE_COMPAT)
-                else -> listOf(GraphicsApi.ANGLE, GraphicsApi.DIRECT3D, GraphicsApi.OPENGL, GraphicsApi.SOFTWARE_FAST, GraphicsApi.SOFTWARE_COMPAT)
+                Arch.Arm64 -> listOf(
+                    GraphicsApi.ANGLE,
+                    GraphicsApi.DIRECT3D,
+                    GraphicsApi.SOFTWARE_FAST,
+                    GraphicsApi.SOFTWARE_COMPAT
+                )
+
+                else -> listOf(
+                    GraphicsApi.ANGLE,
+                    GraphicsApi.DIRECT3D,
+                    GraphicsApi.OPENGL,
+                    GraphicsApi.SOFTWARE_FAST,
+                    GraphicsApi.SOFTWARE_COMPAT
+                )
             }
+
             OS.Android -> return listOf(GraphicsApi.OPENGL)
             else -> return listOf(GraphicsApi.UNKNOWN)
         }

skiko/src/jvmTest/kotlin/org/jetbrains/skia/DirectContextTest.jvm.kt

@@ -3,7 +3,9 @@ package org.jetbrains.skia
 import org.jetbrains.skia.impl.Native.Companion.NullPointer
 import org.jetbrains.skia.impl.NativePointer
 import org.jetbrains.skia.impl.interopScope
+import org.jetbrains.skiko.Library
 import kotlin.test.Test
+import kotlin.test.assertEquals
 
 fun getMakeGLAssembledInterfaceFunc(): NativePointer {
     return interopScope {
@@ -12,11 +14,29 @@ fun getMakeGLAssembledInterfaceFunc(): NativePointer {
 }
 
 class DirectContextTest {
-    @Test
-    fun makeFromInterfaceTest() {
+
+    private companion object {
+        init {
+            Library.load()
+        }
+    }
+
+    private fun makeFromInterface(): DirectContext {
         val fPtr = getMakeGLAssembledInterfaceFunc()
         val i = GLAssembledInterface.createFromNativePointers(NullPointer, fPtr)
-        DirectContext.makeGLWithInterface(i)
+        return DirectContext.makeGLWithInterface(i)
+    }
+
+    @Test
+    fun makeFromInterfaceTest() {
+        makeFromInterface()
+    }
+
+    @Test
+    fun resourceCacheLimitTest() {
+        val context = makeFromInterface()
+        context.resourceCacheLimit = 1024
+        assertEquals(1024, context.resourceCacheLimit)
     }
 }
 

skiko/src/nativeJsMain/cpp/DirectContext.cc

@@ -68,6 +68,18 @@ SKIKO_EXPORT void org_jetbrains_skia_DirectContext__1nFlush
     context->flush(skSurface);
 }
 
+SKIKO_EXPORT KLong org_jetbrains_skia_DirectContext__1nGetResourceCacheLimit
+  (KNativePointer ptr) {
+    GrDirectContext* context = reinterpret_cast<GrDirectContext*>(ptr);
+    return (KLong) context->getResourceCacheLimit();
+}
+
+SKIKO_EXPORT void org_jetbrains_skia_DirectContext__1nSetResourceCacheLimit
+  (KNativePointer ptr, KLong maxResourceBytes) {
+    GrDirectContext* context = reinterpret_cast<GrDirectContext*>(ptr);
+    context->setResourceCacheLimit((size_t) maxResourceBytes);
+}
+
 GrSyncCpu grSyncCpuFromBool(bool syncCpu) {
     if (syncCpu) return GrSyncCpu::kYes;
     return GrSyncCpu::kNo;