JS compilation (#157)

skiko/build.gradle.kts

@@ -36,12 +36,25 @@ repositories {
 }
 
 val skiaZip = run {
-    val zipName = skiko.skiaReleaseForTargetOS + ".zip"
+    val zipName = skiko.skiaReleaseFor(targetOs, targetArch) + ".zip"
     val zipFile = skiko.dependenciesDir.resolve("skia/${zipName.substringAfterLast('/')}")
 
     tasks.register("downloadSkia", Download::class) {
         onlyIf { skiko.skiaDir == null && !zipFile.exists() }
-        inputs.property("skia.release.for.target.os", skiko.skiaReleaseForTargetOS)
+        inputs.property("skia.release.for.target.os", skiko.skiaReleaseFor(targetOs, targetArch))
+        src("https://github.com/JetBrains/skia-pack/releases/download/$zipName")
+        dest(zipFile)
+        onlyIfModified(true)
+    }.map { zipFile }
+}
+
+val skiaWasmZip = run {
+    val release = skiko.skiaReleaseFor(OS.Wasm, Arch.Wasm)
+    val zipName = "$release.zip"
+    val zipFile = skiko.dependenciesDir.resolve("skia/${zipName.substringAfterLast('/')}")
+    tasks.register("downloadSkiaWasm", Download::class) {
+        onlyIf { skiko.skiaDir == null && !zipFile.exists() }
+        inputs.property("skia.release.for.wasm", release)
         src("https://github.com/JetBrains/skia-pack/releases/download/$zipName")
         dest(zipFile)
         onlyIfModified(true)
@@ -70,6 +83,24 @@ val skiaDir = run {
     }
 }
 
+val skiaWasmDir = run {
+    if (skiko.skiaDir != null) {
+        tasks.register("skiaWasmDir", DefaultTask::class) {
+            // dummy task to simplify usage of the resulting provider (see `else` branch)
+            // if a file provider is not created from a task provider,
+            // then it cannot be used instead of a task in `dependsOn` clauses of other tasks.
+            // e.g. the resulting `skiaDir` could not be used in `dependsOn` of CppCompile configuration
+            enabled = false
+        }.map { skiko.skiaDir!! }
+    } else {
+        val targetDir = skiko.dependenciesDir.resolve("skia/skia-wasm")
+        tasks.register("unzipSkiaWasm", Copy::class) {
+            from(skiaWasmZip.map { zipTree(it) })
+            configureSkiaCopy(targetDir)
+        }.map { targetDir }
+    }
+}
+
 val skiaBinSubdir = "out/${buildType.id}-${targetOs.id}-${targetArch.id}"
 
 val Project.supportNative: Boolean
@@ -82,6 +113,11 @@ kotlin {
         }
     }
 
+    js(IR) {
+        browser()
+        binaries.executable()
+    }
+
     if (supportNative) {
         val nativeTarget = when (target) {
             "macos-x64", "macos-arm64" -> macosX64()
@@ -243,6 +279,7 @@ tasks.withType(CppCompile::class.java).configureEach {
                     )
             )
         }
+        OS.Wasm -> throw GradleException("Should not reach here")
     }
 }
 
@@ -275,6 +312,33 @@ project.tasks.register<Exec>("objcCompile") {
     outputs.files(outs)
 }
 
+project.tasks.register<Exec>("wasmCompile") {
+    dependsOn(skiaWasmDir)
+    val inputDir = "$projectDir/src/jsMain/cpp"
+    val outDir = "$buildDir/wasm"
+    val names = File(inputDir).listFiles()!!.map { it.name.removeSuffix(".cc") }
+    val srcs = names.map { "$inputDir/$it.cc" }.toTypedArray()
+    val outJs = "$outDir/skiko.js"
+    val outWasm = "$outDir/skiko.wasm"
+    val skiaDir = skiaWasmDir.get().absolutePath
+    workingDir = File(outDir)
+    val libs = fileTree("$skiaDir/out/Release-wasm-wasm").filter { it.name.endsWith(".a") }
+    commandLine = listOf(
+        "emcc",
+        *Arch.Wasm.clangFlags,
+        "-I$skiaDir",
+        "-I$skiaDir/include",
+        "-I$skiaDir/include/gpu",
+        "-std=c++17",
+        "-o", outJs,
+        *libs.files.map { it.absolutePath }.toTypedArray(),
+        *srcs
+    )
+    file(outDir).mkdirs()
+    inputs.files(srcs)
+    outputs.files(outJs, outWasm)
+}
+
 fun localSign(signer: String, lib: File): File {
     println("Local signing $lib as $signer")
     val proc = ProcessBuilder("codesign", "-f", "-s", signer, lib.absolutePath)
@@ -393,6 +457,9 @@ tasks.withType(LinkSharedLibrary::class.java).configureEach {
                 )
             )
         }
+        OS.Wasm -> {
+            throw GradleException("This task shalln't be used with WASM")
+        }
     }
 }
 
@@ -489,6 +556,17 @@ val skikoJvmRuntimeJar by project.tasks.registering(Jar::class) {
     from(createChecksums.get().outputs.files)
 }
 
+project.tasks.register<Jar>("skikoJsJar") {
+    // We produce jar that contains .js of wrapper/bindings and .wasm with Skia + bindings.
+    from(kotlin.js().compilations["main"].output.allOutputs)
+    from(project.tasks.named("wasmCompile").get().outputs)
+    from(project.tasks.named("jsJar").get().outputs)
+    archiveBaseName.set("skiko-wasm")
+    doLast {
+        println("output at ${outputs.files.files.single()}")
+    }
+}
+
 project.tasks.register<JavaExec>("run") {
     main = "org.jetbrains.skiko.MainKt"
     classpath = files(skikoJvmRuntimeJar.map { it.archiveFile })

skiko/buildSrc/src/main/kotlin/properties.kt

@@ -4,7 +4,8 @@ import java.io.File
 enum class OS(val id: String) {
     Linux("linux"),
     Windows("windows"),
-    MacOS("macos")
+    MacOS("macos"),
+    Wasm("wasm")
     ;
 
     val isWindows
@@ -13,7 +14,8 @@ enum class OS(val id: String) {
 
 enum class Arch(val id: String, val clangFlags: Array<String>) {
     X64("x64", arrayOf("-arch", "x86_64")),
-    Arm64("arm64", arrayOf("-arch", "arm64"))
+    Arm64("arm64", arrayOf("-arch", "arm64")),
+    Wasm("wasm", emptyArray())
 }
 
 enum class SkiaBuildType(
@@ -51,12 +53,14 @@ fun findTargetOs() = when (System.getProperty("skiko.target.os.name")) {
         "linux" -> OS.Linux
         "macos" -> OS.MacOS
         "windows" -> OS.Windows
+        "wasm" -> OS.Wasm
         else -> null
     }
 
 fun findTargetArch() = when (System.getProperty("skiko.target.os.arch")) {
     "x64" -> Arch.X64
     "arm64" -> Arch.Arm64
+    "wasm" -> Arch.Wasm
     else -> null
 }
 
@@ -86,15 +90,11 @@ class SkikoProperties(private val myProject: Project) {
     val buildType: SkiaBuildType
         get() = if (myProject.findProperty("skiko.debug") == "true") SkiaBuildType.DEBUG else SkiaBuildType.RELEASE
 
-    val skiaReleaseForTargetOS: String
-        get() {
+    fun skiaReleaseFor(os: OS, arch: Arch): String {
+        val target = "${os.id}-${arch.id}"
         val tag = myProject.property("dependencies.skia.$target") as String
-            val suffix = if (targetOs == OS.Linux && targetArch == Arch.X64) {
-                "-ubuntu14"
-            } else {
-                ""
-            }
-            return "${tag}/Skia-${tag}-${targetOs.id}-${buildType.id}-${targetArch.id}$suffix"
+        val suffix = if (os == OS.Linux && arch == Arch.X64) "-ubuntu14" else ""
+        return "${tag}/Skia-${tag}-${os.id}-${buildType.id}-${arch.id}$suffix"
     }
 
     val releaseGithubVersion: String

skiko/gradle.properties

@@ -7,3 +7,4 @@ dependencies.skia.linux-x64=m93-87e8842e8c
 dependencies.skia.macos-x64=m93-87e8842e8c
 dependencies.skia.linux-arm64=m93-87e8842e8c
 dependencies.skia.macos-arm64=m93-87e8842e8c
+dependencies.skia.wasm-wasm=m93-87e8842e8c

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.ImageFilter.Companion.makeDropShadowOnly

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import kotlin.jvm.JvmStatic

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

 package org.jetbrains.skia
 
-
 enum class PathEllipseArc {
     /** Smaller of arc pair.  */
     SMALLER,

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.*

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.*

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

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

skiko/src/commonMain/kotlin/org/jetbrains/skia/U16String.kt

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

skiko/src/commonMain/kotlin/org/jetbrains/skia/impl/BufferUtil.kt

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia.impl
 
 import org.jetbrains.skia.ByteBuffer

skiko/src/commonMain/kotlin/org/jetbrains/skia/shaper/FontMgrRunIterator.kt

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia.shaper
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

skiko/src/commonMain/kotlin/org/jetbrains/skia/shaper/HbIcuScriptRunIterator.kt

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia.shaper
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

skiko/src/commonMain/kotlin/org/jetbrains/skia/shaper/IcuBidiRunIterator.kt

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia.shaper
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

skiko/src/commonMain/kotlin/org/jetbrains/skia/shaper/ManagedRunIterator.kt

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia.shaper
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

skiko/src/commonMain/kotlin/org/jetbrains/skia/shaper/Shaper.kt

+@file:Suppress("NESTED_EXTERNAL_DECLARATION")
 package org.jetbrains.skia.shaper
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad

skiko/src/jsMain/cpp/wrapper.cc

+#include "GrBackendSurface.h"
+#include "GrDirectContext.h"
+
+void* init_surface() {
+   return nullptr;
+}
+
+int main() {
+    printf("Hello from WASM\n");
+    //void* ctx = GrDirectContext::MakeGL().release();
+    //printf("Context is %p\n");
+    return 0;
+}

skiko/src/jsMain/kotlin/org/jetbrains/skia/Actuals.js.kt

+package org.jetbrains.skia
+
+actual abstract class ByteBuffer
+
+actual fun <R> commonSynchronized(lock: Any, block: () -> R) {
+    block()
+}
+
+actual fun String.intCodePoints(): IntArray = TODO()
+
+actual class Pattern {
+    actual fun split(input: CharSequence): Array<String?>? = TODO()
+    actual fun matcher(input: CharSequence): Matcher = TODO()
+}
+
+actual class Matcher {
+    actual fun group(name: String): String? = TODO()
+    actual fun matches(): Boolean = TODO()
+}
+
+actual fun defaultLanguageTag(): String = TODO()
+
+actual fun compilePattern(regex: String): Pattern = TODO()
\ No newline at end of file

skiko/src/jsMain/kotlin/org/jetbrains/skia/impl/Library.js.kt

+package org.jetbrains.skia.impl
+
+actual class Library {
+    actual companion object {
+        actual fun staticLoad() {
+            TODO()
+        }
+    }
+}

skiko/src/jsMain/kotlin/org/jetbrains/skia/impl/Managed.js.kt

+package org.jetbrains.skia.impl
+
+actual abstract class Managed actual constructor(ptr: Long, finalizer: Long, managed: Boolean) : Native(ptr) {
+    actual open fun close(): Unit = TODO()
+}
\ No newline at end of file

skiko/src/jsMain/kotlin/org/jetbrains/skia/impl/Native.js.kt

+package org.jetbrains.skia.impl
+
+actual abstract class Native actual constructor(ptr: Long) {
+    actual var _ptr: Long
+
+    actual open fun _nativeEquals(other: Native?): Boolean = TODO()
+
+    actual companion object {
+        actual fun getPtr(n: Native?): Long {
+            return n?._ptr ?: 0
+        }
+    }
+
+    init {
+        if (ptr == 0L) throw RuntimeException("Can't wrap nullptr")
+        _ptr = ptr
+    }
+}
+
+actual fun reachabilityBarrier(obj: Any?) {
+    TODO()
+}
\ No newline at end of file

skiko/src/jsMain/kotlin/org/jetbrains/skia/impl/RefCnt.js.kt

+package org.jetbrains.skia.impl
+
+actual abstract class RefCnt : Managed {
+    actual protected constructor(ptr: Long): super(ptr, 0L, false) { TODO() }
+    actual protected constructor(ptr: Long, allowClose: Boolean): super(ptr, 0, allowClose) { TODO() }
+}
\ No newline at end of file

skiko/src/jsMain/kotlin/org/jetbrains/skia/impl/Stats.js.kt

+package org.jetbrains.skia.impl
+
+actual object Stats {
+    actual fun onNativeCall() {
+        TODO()
+    }
+
+    actual fun onAllocated(className: String) {
+        TODO()
+    }
+
+    actual fun onDeallocated(className: String) {
+        TODO()
+    }
+}
\ No newline at end of file

skiko/src/jsMain/kotlin/org/jetbrains/skiko/wasm/Wrapper.kt

+package org.jetbrains.skiko.wasm
+
+import kotlinx.dom.createElement
+import kotlinx.browser.document
+import org.w3c.dom.HTMLCanvasElement
+
+
+@JsExport
+fun createSkikoCanvas(): HTMLCanvasElement {
+    return document.createElement("canvas") {} as HTMLCanvasElement
+}