Implement MaskFilter, add creation test (#311)

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

@@ -19,7 +19,9 @@ class MaskFilter internal constructor(ptr: NativePointer) : RefCnt(ptr) {
             }
         }
 
-        fun makeTable(table: ByteArray?): MaskFilter {
+        fun makeTable(table: ByteArray): MaskFilter {
+            require(table.size == 256) { "Expected 256 elements, got " + table.size }
+
             Stats.onNativeCall()
             return MaskFilter(
                 interopScope {

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

+package org.jetbrains.skia
+
+import kotlin.test.Test
+
+class MaskFilterTest {
+    @Test
+    fun canCreate() {
+        MaskFilter.makeBlur(FilterBlurMode.NORMAL, 0.5f)
+        MaskFilter.makeClip(100, 200)
+        MaskFilter.makeGamma(1.2f)
+        MaskFilter.makeTable(ByteArray(256) { 127 })
+        MaskFilter.makeShader(Shader.makeColor(Color.GREEN))
+    }
+}
\ No newline at end of file

skiko/src/nativeJsMain/cpp/MaskFilter.cc

@@ -24,19 +24,10 @@ SKIKO_EXPORT KInteropPointer org_jetbrains_skia_MaskFilter__1nMakeShader
 
 
 SKIKO_EXPORT KInteropPointer org_jetbrains_skia_MaskFilter__1nMakeTable
-  (KByte* tableArray) {
-    TODO("implement org_jetbrains_skia_MaskFilter__1nMakeTable");
-}
-     
-#if 0 
-SKIKO_EXPORT KInteropPointer org_jetbrains_skia_MaskFilter__1nMakeTable
-  (KByte* tableArray) {
-    KByte* table = env->GetByteArrayElements(tableArray, 0);
+  (KByte* table) {
     SkMaskFilter* ptr = SkTableMaskFilter::Create(reinterpret_cast<uint8_t*>(table));
-    env->ReleaseByteArrayElements(tableArray, table, 0);
     return reinterpret_cast<KInteropPointer>(ptr);
 }
-#endif
 
 
 SKIKO_EXPORT KInteropPointer org_jetbrains_skia_MaskFilter__1nMakeGamma