allow to change font rendering settings in paragraph (#597)

* allow to change font rendering settings in paragraph

* add test

* rename

* fix js/native signatures

* workaround for kotlinjs

skiko/gradle.properties

@@ -3,17 +3,17 @@ deploy.version=0.0.0
 kotlin.mpp.enableGranularSourceSetsMetadata=true
 kotlin.native.enableDependencyPropagation=false
 
-dependencies.skia.windows-x64=m105-f204b137b9-5
-dependencies.skia.linux-x64=m105-f204b137b9-5
-dependencies.skia.macos-x64=m105-f204b137b9-5
-dependencies.skia.linux-arm64=m105-f204b137b9-5
-dependencies.skia.macos-arm64=m105-f204b137b9-5
-dependencies.skia.wasm-wasm=m105-f204b137b9-5
-dependencies.skia.ios-x64=m105-f204b137b9-5
-dependencies.skia.ios-arm64=m105-f204b137b9-5
-dependencies.skia.iosSim-arm64=m105-f204b137b9-5
-dependencies.skia.iosSim-x64=m105-f204b137b9-5
-dependencies.skia.android-x64=m105-f204b137b9-5
-dependencies.skia.android-arm64=m105-f204b137b9-5
+dependencies.skia.windows-x64=m105-305b7c02
+dependencies.skia.linux-x64=m105-305b7c02
+dependencies.skia.macos-x64=m105-305b7c02
+dependencies.skia.linux-arm64=m105-305b7c02
+dependencies.skia.macos-arm64=m105-305b7c02
+dependencies.skia.wasm-wasm=m105-305b7c02
+dependencies.skia.ios-x64=m105-305b7c02
+dependencies.skia.ios-arm64=m105-305b7c02
+dependencies.skia.iosSim-arm64=m105-305b7c02
+dependencies.skia.iosSim-x64=m105-305b7c02
+dependencies.skia.android-x64=m105-305b7c02
+dependencies.skia.android-arm64=m105-305b7c02
 
 org.gradle.jvmargs=-Xmx3G -XX:MaxMetaspaceSize=512m

skiko/src/commonMain/kotlin/org/jetbrains/skia/paragraph/FontRastrSettings.kt

+package org.jetbrains.skia.paragraph
+
+import org.jetbrains.skia.FontEdging
+import org.jetbrains.skia.FontHinting
+
+data class FontRastrSettings(val edging: FontEdging,
+                             val hinting: FontHinting,
+                             val subpixel: Boolean)
\ No newline at end of file

skiko/src/commonMain/kotlin/org/jetbrains/skia/paragraph/ParagraphStyle.kt

@@ -2,6 +2,8 @@ package org.jetbrains.skia.paragraph
 
 import org.jetbrains.skia.impl.Library.Companion.staticLoad
 import org.jetbrains.skia.ExternalSymbolName
+import org.jetbrains.skia.FontEdging
+import org.jetbrains.skia.FontHinting
 import org.jetbrains.skia.impl.*
 import org.jetbrains.skia.impl.getPtr
 import org.jetbrains.skia.impl.interopScope
@@ -167,6 +169,28 @@ class ParagraphStyle : Managed(ParagraphStyle_nMake(), _FinalizerHolder.PTR) {
         return this
     }
 
+    var fontRastrSettings: FontRastrSettings
+        get() = try {
+            Stats.onNativeCall()
+            val edging = FontEdging.values()[_nGetEdging(_ptr)]
+            Stats.onNativeCall()
+            val hinting = FontHinting.values()[_nGetHinting(_ptr)]
+            Stats.onNativeCall()
+            // by some obscure reason kotlinjs makes difference between number encoded booleans returned from `_nGetSubpixel` and regular booleans
+            // AssertionError: Expected <FontRastrSettings(edging=ALIAS, hinting=NONE, subpixel=false)>, actual <FontRastrSettings(edging=ALIAS, hinting=NONE, subpixel=0)>
+            val subpixel = _nGetSubpixel(_ptr).not().not()
+            FontRastrSettings(edging, hinting, subpixel)
+        } finally {
+            reachabilityBarrier(this)
+        }
+        set(value) = try {
+            Stats.onNativeCall()
+            _nSetFontRastrSettings(_ptr, value.edging.ordinal, value.hinting.ordinal, value.subpixel)
+        } finally {
+            reachabilityBarrier(this)
+        }
+
+
     var textIndent: TextIndent
         get() = try {
             Stats.onNativeCall()
@@ -259,6 +283,18 @@ private external fun _nIsHintingEnabled(ptr: NativePointer): Boolean
 @ExternalSymbolName("org_jetbrains_skia_paragraph_ParagraphStyle__1nDisableHinting")
 private external fun _nDisableHinting(ptr: NativePointer)
 
+@ExternalSymbolName("org_jetbrains_skia_paragraph_ParagraphStyle__1nSetFontRastrSettings")
+private external fun _nSetFontRastrSettings(ptr: NativePointer, edging: Int, hinting: Int, subpixel: Boolean)
+
+@ExternalSymbolName("org_jetbrains_skia_paragraph_ParagraphStyle__1nGetEdging")
+private external fun _nGetEdging(ptr: NativePointer): Int
+
+@ExternalSymbolName("org_jetbrains_skia_paragraph_ParagraphStyle__1nGetHinting")
+private external fun _nGetHinting(ptr: NativePointer): Int
+
+@ExternalSymbolName("org_jetbrains_skia_paragraph_ParagraphStyle__1nGetSubpixel")
+private external fun _nGetSubpixel(ptr: NativePointer): Boolean
+
 @ExternalSymbolName("org_jetbrains_skia_paragraph_ParagraphStyle__1nSetTextIndent")
 private external fun _nSetTextIndent(ptr: NativePointer, firstLine: Float, restLine: Float)
 

skiko/src/commonTest/kotlin/org/jetbrains/skiko/paragraph/ParagraphStyleTests.kt

 package org.jetbrains.skiko.paragraph
 
+import org.jetbrains.skia.FontEdging
+import org.jetbrains.skia.FontHinting
 import org.jetbrains.skia.impl.use
+import org.jetbrains.skia.paragraph.FontRastrSettings
 import org.jetbrains.skia.paragraph.ParagraphStyle
 import org.jetbrains.skia.paragraph.TextIndent
 import kotlin.test.Test
@@ -32,4 +35,24 @@ class ParagraphStyleTests {
             assertEquals(indent2, paragraphStyle.textIndent)
         }
     }
+
+    @Test
+    fun paragraphStyleFontRastrSettingsTests() {
+        ParagraphStyle().use { paragraphStyle ->
+            val poorRasterSettings = FontRastrSettings(
+                edging = FontEdging.ALIAS,
+                hinting = FontHinting.NONE,
+                subpixel = false)
+            paragraphStyle.fontRastrSettings = poorRasterSettings
+            assertEquals(poorRasterSettings, paragraphStyle.fontRastrSettings)
+
+            val gloriousRasterSettings = FontRastrSettings(
+                edging = FontEdging.SUBPIXEL_ANTI_ALIAS,
+                hinting = FontHinting.FULL,
+                subpixel = true)
+
+            paragraphStyle.fontRastrSettings = gloriousRasterSettings
+            assertEquals(gloriousRasterSettings, paragraphStyle.fontRastrSettings)
+        }
+    }
 }
\ No newline at end of file

skiko/src/jvmMain/cpp/common/paragraph/ParagraphStyle.cc

@@ -143,6 +143,37 @@ extern "C" JNIEXPORT jboolean JNICALL Java_org_jetbrains_skia_paragraph_Paragrap
     return instance->hintingIsOn();
 }
 
+extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_paragraph_ParagraphStyleKt__1nSetFontRastrSettings
+  (JNIEnv* env, jclass jclass, jlong ptr, jint edging, jint hinting, jboolean subpixel) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(static_cast<uintptr_t>(ptr));
+    FontRastrSettings fontRastrSettings;
+    fontRastrSettings.fEdging = static_cast<SkFont::Edging>(edging);
+    fontRastrSettings.fHinting = static_cast<SkFontHinting>(hinting);
+    fontRastrSettings.fSubpixel = subpixel;
+    instance->setFontRastrSettings(fontRastrSettings);
+}
+
+extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_paragraph_ParagraphStyleKt__1nGetEdging
+  (JNIEnv* env, jclass jclass, jlong ptr) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(static_cast<uintptr_t>(ptr));
+    FontRastrSettings fontRastrSettings = instance->getFontRastrSettings();
+    return static_cast<jint>(fontRastrSettings.fEdging);
+}
+
+extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_paragraph_ParagraphStyleKt__1nGetHinting
+  (JNIEnv* env, jclass jclass, jlong ptr) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(static_cast<uintptr_t>(ptr));
+    FontRastrSettings fontRastrSettings = instance->getFontRastrSettings();
+    return static_cast<jint>(fontRastrSettings.fHinting);
+}
+
+extern "C" JNIEXPORT jboolean JNICALL Java_org_jetbrains_skia_paragraph_ParagraphStyleKt__1nGetSubpixel
+  (JNIEnv* env, jclass jclass, jlong ptr) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(static_cast<uintptr_t>(ptr));
+    FontRastrSettings fontRastrSettings = instance->getFontRastrSettings();
+    return fontRastrSettings.fSubpixel;
+}
+
 extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_paragraph_ParagraphStyleKt__1nDisableHinting
   (JNIEnv* env, jclass jclass, jlong ptr) {
     ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(static_cast<uintptr_t>(ptr));

skiko/src/nativeJsMain/cpp/paragraph/ParagraphStyle.cc

@@ -146,6 +146,37 @@ SKIKO_EXPORT void org_jetbrains_skia_paragraph_ParagraphStyle__1nDisableHinting
     instance->turnHintingOff();
 }
 
+SKIKO_EXPORT void org_jetbrains_skia_paragraph_ParagraphStyle__1nSetFontRastrSettings
+  (KNativePointer ptr, KInt edging, KInt hinting, KBoolean subpixel) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(ptr);
+    FontRastrSettings fontRastrSettings;
+    fontRastrSettings.fEdging = static_cast<SkFont::Edging>(edging);
+    fontRastrSettings.fHinting = static_cast<SkFontHinting>(hinting);
+    fontRastrSettings.fSubpixel = subpixel;
+    instance->setFontRastrSettings(fontRastrSettings);
+}
+
+SKIKO_EXPORT KInt org_jetbrains_skia_paragraph_ParagraphStyle__1nGetEdging
+  (KNativePointer ptr) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(ptr);
+    FontRastrSettings fontRastrSettings = instance->getFontRastrSettings();
+    return static_cast<KInt>(fontRastrSettings.fEdging);
+}
+
+SKIKO_EXPORT KInt org_jetbrains_skia_paragraph_ParagraphStyle__1nGetHinting
+  (KNativePointer ptr) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(ptr);
+    FontRastrSettings fontRastrSettings = instance->getFontRastrSettings();
+    return static_cast<KInt>(fontRastrSettings.fHinting);
+}
+
+SKIKO_EXPORT KBoolean org_jetbrains_skia_paragraph_ParagraphStyle__1nGetSubpixel
+  (KNativePointer  ptr) {
+    ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>(ptr);
+    FontRastrSettings fontRastrSettings = instance->getFontRastrSettings();
+    return fontRastrSettings.fSubpixel;
+}
+
 SKIKO_EXPORT void org_jetbrains_skia_paragraph_ParagraphStyle__1nSetTextIndent
   (KNativePointer ptr, KFloat firstLine, KFloat restLine) {
     ParagraphStyle* instance = reinterpret_cast<ParagraphStyle*>((ptr));