TextBlob common (#358)

* add TextBlobTest.kt: canMakeFromPos

* add TextBlobTest.kt: getIntercepts

* add TextBlobTest.kt: tightBounds

* add TextBlobTest.kt: blockBounds

* TextBlob: make _nGetBlockBounds code reusable by moving it to commonMain/cpp

* TextBlob: make _nGetTightBounds code reusable by moving it to commonMain/cpp

* TextBlob: make _nGetPositions code reusable by moving it to commonMain/cpp

* TextBlob: make _nGetGlyphs code reusable by moving it to commonMain/cpp

* TextBlob: firstBaseline and lastBaseline

* TextBlob: _nMakeFromPosH

* TextBlob: _nMakeFromRSXform

* TextBlob: _nGetClusters

* fix jni compilation for windows: add reinterpret_cast

* update github action to upload test reports for failing tests too

* update TextBlobTest.kt

* add comment

* PR review improvements

* update epsilon

* update epsilon

* update epsilon
Co-authored-by: Oleksandr Karpovich <oleksandr.karpovich@jetbrains.com>

skiko/src/commonMain/cpp/common/include/RunRecordClone.hh

+// Must match SkTextBlobPriv.h
+//
+// Extended Textblob runs have more data after the Pos[] array:
+//
+//    -------------------------------------------------------------------------
+//    ... | RunRecord | Glyphs[] | Pos[] | TextSize | Clusters[] | Text[] | ...
+//    -------------------------------------------------------------------------
+class RunRecordClone {
+public:
+    SkFont    fFont;
+    uint32_t  fCount;
+    SkPoint   fOffset;
+    uint32_t  fFlags;
+
+    uint16_t* glyphBuffer() const {
+        // Glyphs are stored immediately following the record.
+        return reinterpret_cast<uint16_t*>(const_cast<RunRecordClone*>(this) + 1);
+    }
+
+    SkScalar* posBuffer() const {
+        // Position scalars follow the (aligned) glyph buffer.
+        return reinterpret_cast<SkScalar*>(reinterpret_cast<uint8_t*>(this->glyphBuffer()) +
+                                           SkAlign4(fCount * sizeof(uint16_t)));
+    }
+
+    uint32_t* textSizePtr() const {
+        // textSize follows the position buffer.
+        return (uint32_t*)(&this->posBuffer()[fCount * ScalarsPerGlyph(positioning())]);
+    }
+
+    uint32_t textSize() const {
+        return isExtended() ? *this->textSizePtr() : 0;
+    }
+
+    uint32_t* clusterBuffer() const {
+        // clusters follow the textSize.
+        return isExtended() ? 1 + this->textSizePtr() : nullptr;
+    }
+
+    char* textBuffer() const {
+        return isExtended()
+               ? reinterpret_cast<char*>(this->clusterBuffer() + fCount)
+               : nullptr;
+    }
+
+    uint8_t positioning() const {
+        return fFlags & 0x3; // kPositioning_Mask
+    }
+
+    bool isExtended() const {
+        return fFlags & 0x8; // kExtended_Flag
+    }
+
+    static unsigned ScalarsPerGlyph(uint8_t pos) {
+        uint8_t res = 0;
+        switch(pos) {
+            case 0: // kDefault_Positioning
+            case 1: // kHorizontal_Positioning
+            case 2: // kFull_Positioning
+                res = pos;
+                break;
+            case 3: // kRSXform_Positioning
+                res = 4;
+                break;
+        }
+        return res;
+    }
+};

skiko/src/commonMain/cpp/common/include/mppinterop.h

+#pragma once
+#include "SkRect.h"
+#include "SkTextBlob.h"
+#include "SkFont.h"
+#include "SkFontMetrics.h"
+
+namespace skikoMpp {
+    namespace skrect {
+        void serializeAs4Floats(const SkRect& rect, float* result);
+    }
+
+    namespace textblob {
+        std::unique_ptr<SkRect> getBlockBounds(SkTextBlob* instance);
+        std::unique_ptr<SkRect> getTightBounds(SkTextBlob* instance);
+        int getPositionsLength(SkTextBlob* instance);
+        void getPositions(SkTextBlob* instance, float* resultArray);
+        void getGlyphs(SkTextBlob* instance, short* resultArray);
+        int getGlyphsLength(SkTextBlob* instance);
+        bool getFirstBaseline(SkTextBlob* instance, float* resultArray);
+        bool getLastBaseline(SkTextBlob* instance, float* resultArray);
+        int getClustersLength(SkTextBlob* instance);
+        bool getClusters(SkTextBlob* instance, int* clusters);
+    }
+}
+
+namespace skija {
+
+    class UtfIndicesConverter {
+    public:
+        UtfIndicesConverter(const char* chars8, size_t len8);
+        UtfIndicesConverter(const SkString& s);
+
+        const char* fStart8;
+        const char* fPtr8;
+        const char* fEnd8;
+        uint32_t fPos16;
+
+        size_t from16To8(uint32_t i16);
+        uint32_t from8To16(size_t i8);
+    };
+}

skiko/src/commonMain/cpp/common/mppinterop.cc

+#include "mppinterop.h"
+#include "RunRecordClone.hh"
+#include "src/utils/SkUTF.h"
+
+namespace skikoMpp {
+    namespace skrect {
+        void serializeAs4Floats(const SkRect& rect, float* result) {
+            result[0] = rect.fLeft;
+            result[1] = rect.fTop;
+            result[2] = rect.fRight;
+            result[3] = rect.fBottom;
+        }
+    }
+
+    namespace textblob {
+        std::unique_ptr<SkRect> getBlockBounds(SkTextBlob* instance) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+
+            auto bounds = new SkRect();
+            SkFontMetrics metrics;
+
+            while (iter.next(&run)) {
+                // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                if (runRecord->positioning() != 2) // kFull_Positioning
+                    return std::unique_ptr<SkRect>(nullptr);
+
+                SkScalar* posBuffer = runRecord->posBuffer();
+                const SkFont& font = runRecord->fFont;
+                font.getMetrics(&metrics);
+
+                SkScalar lastLeft = posBuffer[(run.fGlyphCount - 1) * 2];
+                SkScalar lastWidth;
+                if (run.fGlyphCount > 1 && SkScalarNearlyEqual(posBuffer[(run.fGlyphCount - 2) * 2], lastLeft))
+                    lastWidth = 0;
+                else
+                    font.getWidths(&run.fGlyphIndices[run.fGlyphCount - 1], 1, &lastWidth);
+
+                auto runBounds = SkRect::MakeLTRB(posBuffer[0], posBuffer[1] + metrics.fAscent, lastLeft + lastWidth, posBuffer[1] + metrics.fDescent);
+                bounds->join(runBounds);
+            }
+
+            return std::unique_ptr<SkRect>(bounds);
+        }
+
+        std::unique_ptr<SkRect> getTightBounds(SkTextBlob* instance) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            auto bounds = new SkRect();
+            SkRect tmpBounds;
+            while (iter.next(&run)) {
+                // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                if (runRecord->positioning() != 2) // kFull_Positioning
+                    return std::unique_ptr<SkRect>(nullptr);
+
+                runRecord->fFont.measureText(runRecord->glyphBuffer(), run.fGlyphCount * sizeof(uint16_t), SkTextEncoding::kGlyphID, &tmpBounds, nullptr);
+                SkScalar* posBuffer = runRecord->posBuffer();
+                tmpBounds.offset(posBuffer[0], posBuffer[1]);
+                bounds->join(tmpBounds);
+            }
+            return std::unique_ptr<SkRect>(bounds);
+        }
+
+        int getPositionsLength(SkTextBlob* instance) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            int count = 0;
+            while (iter.next(&run)) {
+                // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                unsigned scalarsPerGlyph = RunRecordClone::ScalarsPerGlyph(runRecord->positioning());
+                count += run.fGlyphCount * scalarsPerGlyph;
+            }
+            return count;
+        }
+
+        void getPositions(SkTextBlob* instance, float* resultArray) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            size_t stored = 0;
+
+            while (iter.next(&run)) {
+                // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                unsigned scalarsPerGlyph = RunRecordClone::ScalarsPerGlyph(runRecord->positioning());
+                memcpy(&resultArray[stored], runRecord->posBuffer(), run.fGlyphCount * scalarsPerGlyph * sizeof(SkScalar));
+                stored += run.fGlyphCount * scalarsPerGlyph;
+            }
+        }
+
+        void getGlyphs(SkTextBlob* instance, short* resultArray) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+
+            size_t stored = 0;
+            while (iter.next(&run)) {
+                memcpy(&resultArray[stored], run.fGlyphIndices, run.fGlyphCount * sizeof(uint16_t));
+                stored += run.fGlyphCount;
+            }
+        }
+
+        int getGlyphsLength(SkTextBlob* instance) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            int stored = 0;
+            while (iter.next(&run)) {
+                stored += run.fGlyphCount;
+            }
+            return stored;
+        }
+
+        bool getFirstBaseline(SkTextBlob* instance, float* resultArray) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            if (iter.next(&run)) {
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                if (runRecord->positioning() != 2) // kFull_Positioning
+                    return false;
+                resultArray[0] = runRecord->posBuffer()[1];
+                return true;
+            }
+            return false;
+        }
+
+        bool getLastBaseline(SkTextBlob* instance, float* resultArray) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            SkScalar baseline = 0;
+            while (iter.next(&run)) {
+                // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                if (runRecord->positioning() != 2) // kFull_Positioning
+                    return false;
+
+                baseline = std::max(baseline, runRecord->posBuffer()[1]);
+            }
+            resultArray[0] = baseline;
+            return true;
+        }
+
+        int getClustersLength(SkTextBlob* instance) {
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            size_t count = 0;
+            while (iter.next(&run)) {
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                if (!runRecord->isExtended())
+                    return 0;
+                count += run.fGlyphCount;
+            }
+            return count;
+        }
+
+        bool getClusters(SkTextBlob* instance, int* clusters) { // implementation was taken from skija
+            SkTextBlob::Iter iter(*instance);
+            SkTextBlob::Iter::Run run;
+            size_t stored = 0;
+            // uint32_t cluster8 = 0;
+            uint32_t runStart16 = 0;
+
+            while (iter.next(&run)) {
+                // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
+                auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
+                if (!runRecord->isExtended()) {
+                    return false;
+                }
+
+                skija::UtfIndicesConverter conv(runRecord->textBuffer(), runRecord->textSize());
+                uint32_t* clusterBuffer = runRecord->clusterBuffer();
+                for (int i = 0; i < run.fGlyphCount; ++i)
+                    clusters[stored + i] = runStart16 + conv.from8To16(clusterBuffer[i]);
+                runStart16 += conv.from8To16(runRecord->textSize());
+                // memcpy(&clusters[stored], runRecord->clusterBuffer(), run.fGlyphCount * sizeof(uint32_t));
+
+                stored += run.fGlyphCount;
+            }
+            return true;
+        }
+    }
+}
+
+
+namespace skija {
+    UtfIndicesConverter::UtfIndicesConverter(const char* chars8, size_t len8):
+      fStart8(chars8),
+      fPtr8(chars8),
+      fEnd8(chars8 + len8),
+      fPos16(0)
+    {}
+
+    UtfIndicesConverter::UtfIndicesConverter(const SkString& str):
+      skija::UtfIndicesConverter::UtfIndicesConverter(str.c_str(), str.size())
+    {}
+
+    size_t UtfIndicesConverter::from16To8(uint32_t i16) {
+        if (i16 >= fPos16) {
+            // if new i16 >= last fPos16, continue from where we started
+        } else {
+            fPtr8 = fStart8;
+            fPos16 = 0;
+        }
+
+        while (fPtr8 < fEnd8 && fPos16 < i16) {
+            SkUnichar u = SkUTF::NextUTF8(&fPtr8, fEnd8);
+            fPos16 += (uint32_t) SkUTF::ToUTF16(u);
+        }
+
+        return fPtr8 - fStart8;
+    }
+
+    uint32_t UtfIndicesConverter::from8To16(size_t i8) {
+        if (i8 >= (size_t) (fPtr8 - fStart8)) {
+            // if new i8 >= last fPtr8, continue from where we started
+        } else {
+            fPtr8 = fStart8;
+            fPos16 = 0;
+        }
+
+        while (fPtr8 < fEnd8 && (size_t) (fPtr8 - fStart8) < i8) {
+            SkUnichar u = SkUTF::NextUTF8(&fPtr8, fEnd8);
+            fPos16 += (uint32_t) SkUTF::ToUTF16(u);
+        }
+
+        return fPos16;
+    }
+}

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

 package org.jetbrains.skia
 
-import org.jetbrains.skia.impl.InteropPointer
+import org.jetbrains.skia.impl.*
 import org.jetbrains.skia.impl.Library.Companion.staticLoad
-import org.jetbrains.skia.impl.Managed
-import org.jetbrains.skia.impl.NativePointer
-import org.jetbrains.skia.impl.Stats
-import org.jetbrains.skia.impl.getPtr
-import org.jetbrains.skia.impl.interopScope
-import org.jetbrains.skia.impl.reachabilityBarrier
 
 class PathMeasure internal constructor(ptr: NativePointer) : Managed(ptr, _FinalizerHolder.PTR) {
     companion object {
@@ -210,17 +204,6 @@ class PathMeasure internal constructor(ptr: NativePointer) : Managed(ptr, _Final
     }
 }
 
-private inline fun withNullableResult(result: FloatArray, block: (InteropPointer) -> Boolean): FloatArray? = interopScope {
-    val handle = toInterop(result)
-    val blockResult = block(handle)
-    if (blockResult) {
-        handle.fromInterop(result)
-        result
-    } else {
-        null
-    }
-}
-
 @ExternalSymbolName("org_jetbrains_skia_PathMeasure__1nGetFinalizer")
 private external fun PathMeasure_nGetFinalizer(): NativePointer
 

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

@@ -22,6 +22,7 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
                 val ptr = interopScope {
                     _nMakeFromPosH(
                         toInterop(glyphs),
+                        glyphs.size,
                         toInterop(xpos),
                         ypos,
                         getPtr(font)
@@ -53,7 +54,7 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
                 Stats.onNativeCall()
                 val ptr =
                     interopScope {
-                        _nMakeFromPos(toInterop(glyphs), toInterop(floatPos), getPtr(font))
+                        _nMakeFromPos(toInterop(glyphs), glyphs.size, toInterop(floatPos), getPtr(font))
                     }
                 if (ptr == NullPointer) null else TextBlob(ptr)
             } finally {
@@ -75,6 +76,7 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
                 val ptr = interopScope {
                     _nMakeFromRSXform(
                         toInterop(glyphs),
+                        glyphs.size,
                         toInterop(floatXform),
                         getPtr(font)
                     )
@@ -110,7 +112,9 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     val bounds: Rect
         get() = try {
             Stats.onNativeCall()
-            _nBounds(_ptr)
+            Rect.fromInteropPointer {
+                _nBounds(_ptr, it)
+            }
         } finally {
             reachabilityBarrier(this)
         }
@@ -143,7 +147,7 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
      * @return           intersections; may be null
      */
     fun getIntercepts(lowerBound: Float, upperBound: Float): FloatArray? {
-        return getIntercepts(lowerBound, upperBound)
+        return getIntercepts(lowerBound, upperBound, null)
     }
 
     /**
@@ -164,12 +168,15 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     fun getIntercepts(lowerBound: Float, upperBound: Float, paint: Paint?): FloatArray? {
         return try {
             Stats.onNativeCall()
-            _nGetIntercepts(
-                _ptr,
-                lowerBound,
-                upperBound,
-                getPtr(paint)
-            )
+            withResult(FloatArray(_nGetInterceptsLength(_ptr, lowerBound, upperBound, getPtr(paint)))) {
+                _nGetIntercepts(
+                    ptr = _ptr,
+                    lower = lowerBound,
+                    upper = upperBound,
+                    paintPtr = getPtr(paint),
+                    resultArray = it
+                )
+            }
         } finally {
             reachabilityBarrier(this)
             reachabilityBarrier(paint)
@@ -222,7 +229,9 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     val positions: FloatArray
         get() = try {
             Stats.onNativeCall()
-            _nGetPositions(_ptr)
+            withResult(FloatArray(_nGetPositionsLength(_ptr))) {
+                _nGetPositions(_ptr, it)
+            }
         } finally {
             reachabilityBarrier(this)
         }
@@ -236,8 +245,9 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     val clusters: IntArray
         get() = try {
             Stats.onNativeCall()
-            val res = _nGetClusters(_ptr) ?: throw IllegalArgumentException()
-            res
+            withNullableResult(IntArray(_nGetClustersLength(_ptr))) {
+                _nGetClusters(_ptr, it)
+            } ?: throw IllegalArgumentException()
         } finally {
             reachabilityBarrier(this)
         }
@@ -251,8 +261,9 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     val tightBounds: Rect
         get() = try {
             Stats.onNativeCall()
-            val res = _nGetTightBounds(_ptr) ?: throw IllegalArgumentException()
-            res
+            Rect.fromInteropPointerNullable {
+                _nGetTightBounds(_ptr, it)
+            } ?: throw IllegalArgumentException()
         } finally {
             reachabilityBarrier(this)
         }
@@ -266,8 +277,9 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     val blockBounds: Rect
         get() = try {
             Stats.onNativeCall()
-            val res = _nGetBlockBounds(_ptr) ?: throw IllegalArgumentException()
-            res
+            Rect.fromInteropPointerNullable {
+                _nGetBlockBounds(_ptr, it)
+            } ?: throw IllegalArgumentException()
         } finally {
             reachabilityBarrier(this)
         }
@@ -281,8 +293,9 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     val firstBaseline: Float
         get() = try {
             Stats.onNativeCall()
-            val res = _nGetFirstBaseline(_ptr) ?: throw IllegalArgumentException()
-            res
+            withNullableResult(FloatArray(1)) {
+                _nGetFirstBaseline(_ptr, it)
+            }?.firstOrNull() ?: throw IllegalArgumentException()
         } finally {
             reachabilityBarrier(this)
         }
@@ -296,8 +309,9 @@ class TextBlob internal constructor(ptr: NativePointer) : Managed(ptr, _Finalize
     val lastBaseline: Float
         get() = try {
             Stats.onNativeCall()
-            val res = _nGetLastBaseline(_ptr) ?: throw IllegalArgumentException()
-            res
+            withNullableResult(FloatArray(1)) {
+                _nGetLastBaseline(_ptr, it)
+            }?.firstOrNull() ?: throw IllegalArgumentException()
         } finally {
             reachabilityBarrier(this)
         }
@@ -320,19 +334,22 @@ private external fun TextBlob_nSerializeToData(ptr: NativePointer /*, SkSerialPr
 private external fun TextBlob_nMakeFromData(dataPtr: NativePointer /*, SkDeserialProcs */): NativePointer
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nBounds")
-private external fun _nBounds(ptr: NativePointer): Rect
+private external fun _nBounds(ptr: NativePointer, resultRect: InteropPointer)
+
+@ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetInterceptsLength")
+private external fun _nGetInterceptsLength(ptr: NativePointer, lower: Float, upper: Float, paintPtr: NativePointer): Int
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetIntercepts")
-private external fun _nGetIntercepts(ptr: NativePointer, lower: Float, upper: Float, paintPtr: NativePointer): FloatArray?
+private external fun _nGetIntercepts(ptr: NativePointer, lower: Float, upper: Float, paintPtr: NativePointer, resultArray: InteropPointer)
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nMakeFromPosH")
-private external fun _nMakeFromPosH(glyphs: InteropPointer, xpos: InteropPointer, ypos: Float, fontPtr: NativePointer): NativePointer
+private external fun _nMakeFromPosH(glyphs: InteropPointer, glyphsLen: Int, xpos: InteropPointer, ypos: Float, fontPtr: NativePointer): NativePointer
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nMakeFromPos")
-private external fun _nMakeFromPos(glyphs: InteropPointer, pos: InteropPointer, fontPtr: NativePointer): NativePointer
+private external fun _nMakeFromPos(glyphs: InteropPointer, glyphsLen: Int, pos: InteropPointer, fontPtr: NativePointer): NativePointer
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nMakeFromRSXform")
-private external fun _nMakeFromRSXform(glyphs: InteropPointer, xform: InteropPointer, fontPtr: NativePointer): NativePointer
+private external fun _nMakeFromRSXform(glyphs: InteropPointer, glyphsLen: Int, xform: InteropPointer, fontPtr: NativePointer): NativePointer
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetGlyphsLength")
 private external fun _nGetGlyphsLength(ptr: NativePointer): Int
@@ -340,20 +357,26 @@ private external fun _nGetGlyphsLength(ptr: NativePointer): Int
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetGlyphs")
 private external fun _nGetGlyphs(ptr: NativePointer, result: InteropPointer)
 
+@ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetPositionsLength")
+private external fun _nGetPositionsLength(ptr: NativePointer): Int
+
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetPositions")
-private external fun _nGetPositions(ptr: NativePointer): FloatArray
+private external fun _nGetPositions(ptr: NativePointer, resultArray: InteropPointer)
+
+@ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetClustersLength")
+private external fun _nGetClustersLength(ptr: NativePointer): Int
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetClusters")
-private external fun _nGetClusters(ptr: NativePointer): IntArray?
+private external fun _nGetClusters(ptr: NativePointer, resultArray: InteropPointer): Boolean
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetTightBounds")
-private external fun _nGetTightBounds(ptr: NativePointer): Rect?
+private external fun _nGetTightBounds(ptr: NativePointer, resultArray: InteropPointer): Boolean
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetBlockBounds")
-private external fun _nGetBlockBounds(ptr: NativePointer): Rect?
+private external fun _nGetBlockBounds(ptr: NativePointer, resultArray: InteropPointer): Boolean
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetFirstBaseline")
-private external fun _nGetFirstBaseline(ptr: NativePointer): Float?
+private external fun _nGetFirstBaseline(ptr: NativePointer, resultArray: InteropPointer): Boolean
 
 @ExternalSymbolName("org_jetbrains_skia_TextBlob__1nGetLastBaseline")
-private external fun _nGetLastBaseline(ptr: NativePointer): Float?
+private external fun _nGetLastBaseline(ptr: NativePointer, resultArray: InteropPointer): Boolean

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

@@ -71,6 +71,17 @@ inline fun withResult(result: FloatArray, block: InteropScope.(InteropPointer) -
     result
 }
 
+inline fun withNullableResult(result: FloatArray, block: InteropScope.(InteropPointer) -> Boolean): FloatArray? = interopScope {
+    val handle = toInterop(result)
+    val blockResult = block(handle)
+    if (blockResult) {
+        handle.fromInterop(result)
+        result
+    } else {
+        null
+    }
+}
+
 inline fun withResult(result: IntArray, block: InteropScope.(InteropPointer) -> Unit): IntArray = interopScope {
     val handle = toInterop(result)
     block(handle)

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

+package org.jetbrains.skia
+
+import org.jetbrains.skia.tests.assertCloseEnough
+import org.jetbrains.skia.tests.assertContentCloseEnough
+import org.jetbrains.skia.tests.makeFromResource
+import org.jetbrains.skiko.KotlinBackend
+import org.jetbrains.skiko.kotlinBackend
+import org.jetbrains.skiko.tests.runTest
+import kotlin.math.cos
+import kotlin.math.sin
+import kotlin.test.*
+
+class TextBlobTest {
+
+    private val inter36: suspend () -> Font = suspend {
+        Font(Typeface.makeFromResource("./fonts/Inter-Hinted-Regular.ttf"), 36f)
+    }
+
+    // smaller eps values make tests fail
+    private val eps = when (kotlinBackend) {
+        KotlinBackend.JS -> 0.02f
+        KotlinBackend.Native -> 0.02f
+        else -> 0.02f
+    }
+
+    @Test
+    fun canMakeFromPos() = runTest {
+        val glyphs = shortArrayOf(1983, 830, 1213, 1205, 638, 1231, 1326, 161, 611, 721, 721, 773, 1326)
+
+        val positions = listOf(
+            0.0f, 0.0f, 26.0f, 0.0f, 48.0f, 0.0f, 69.0f, 0.0f, 89.0f, 0.0f, 109.28409f, 0.0f, 128.28409f, 0.0f,
+            138.28409f, 0.0f, 165.28409f, 0.0f, 186.28409f, 0.0f, 195.28409f, 0.0f, 204.28409f, 0.0f, 225.28409f, 0.0f
+        ).chunked(2).map { Point(it[0], it[1]) }.toTypedArray()
+
+        val textBlob = TextBlob.makeFromPos(
+            glyphs = glyphs,
+            pos = positions,
+            font = inter36()
+        )!!
+
+        assertNotEquals(
+            illegal = 0,
+            actual = textBlob.uniqueId,
+            message = "uniqueId should return a non-zero value unique among all text blobs."
+        )
+
+        assertContentEquals(
+            expected = glyphs,
+            actual = textBlob.glyphs
+        )
+
+        assertContentEquals(
+            expected = Point.flattenArray(positions),
+            actual = textBlob.positions
+        )
+
+        assertCloseEnough(
+            expected = Rect(-26.59091f, -39.272827f, 318.27557f, 11.505432f),
+            actual = textBlob.bounds,
+            epsilon = eps
+        )
+
+        assertContentCloseEnough(
+            expected = floatArrayOf(
+                3.2215908f, 19.585226f, 28.761364f, 40.38493f, 50.761364f, 63.698864f, 71.76136f, 81.017044f, 97.01448f,
+                102.99094f, 132.33693f, 134.25397f, 141.45454f, 158.58522f, 173.29857f, 179.27502f, 212.21196f,
+                217.8335f, 229.33693f, 231.25397f
+            ),
+            actual = textBlob.getIntercepts(lowerBound = 0f, upperBound = 1f),
+            epsilon = eps
+        )
+
+        // Ensure can get tightBounds. we don't make assertEquals because platforms' results vary
+        val tightBoundsRect = textBlob.tightBounds
+
+        assertCloseEnough(
+            expected = Rect(0f, -34.875f, 235.30681f, 8.692932f),
+            actual = textBlob.blockBounds.also { println(it) },
+            epsilon = 0.2f // smaller values make tests fail on some platforms
+        )
+
+        assertEquals(0f, textBlob.firstBaseline)
+        assertEquals(0f, textBlob.lastBaseline)
+
+        assertFailsWith<IllegalArgumentException> {
+            // this TextBlob doesn't have such information
+            textBlob.clusters
+        }
+
+        val data = textBlob.serializeToData()
+        val blobFromData = TextBlob.makeFromData(data)!!
+        assertContentEquals(expected = glyphs, actual = blobFromData.glyphs)
+        assertContentEquals(expected = Point.flattenArray(positions), actual = blobFromData.positions)
+    }
+
+    @Test
+    fun canMakeFromPosH() = runTest {
+        val glyphs = shortArrayOf(1983, 830, 1213, 1205, 638, 1231, 1326, 161, 611, 721, 721, 773, 1326)
+
+        val positions = listOf(
+            0.0f, 0.0f, 26.0f, 0.0f, 48.0f, 0.0f, 69.0f, 0.0f, 89.0f, 0.0f, 109.28409f, 0.0f, 128.28409f, 0.0f,
+            138.28409f, 0.0f, 165.28409f, 0.0f, 186.28409f, 0.0f, 195.28409f, 0.0f, 204.28409f, 0.0f, 225.28409f, 0.0f
+        ).filterIndexed {
+            // remove y, leave only x (horizontal positions)
+                ix, _ ->
+            ix % 2 == 0
+        }.toTypedArray().toFloatArray()
+
+        val textBlob = TextBlob.makeFromPosH(
+            glyphs = glyphs,
+            xpos = positions,
+            ypos = 1f,
+            font = inter36()
+        )!!
+
+        assertNotEquals(
+            illegal = 0,
+            actual = textBlob.uniqueId,
+            message = "uniqueId should return a non-zero value unique among all text blobs."
+        )
+
+        assertNotEquals(
+            illegal = 0,
+            actual = textBlob.uniqueId,
+            message = "uniqueId should return a non-zero value unique among all text blobs."
+        )
+
+        assertContentEquals(
+            expected = glyphs,
+            actual = textBlob.glyphs
+        )
+
+        assertContentEquals(
+            expected = positions,
+            actual = textBlob.positions
+        )
+
+        assertCloseEnough(
+            expected = Rect(-26.59091f, -38.272827f, 318.27557f, 12.505432f),
+            actual = textBlob.bounds,
+            epsilon = eps
+        )
+
+        assertContentCloseEnough(
+            expected = floatArrayOf(
+                3.2215908f, 22.75568f, 28.761364f, 42.330772f, 50.761364f, 66.71591f, 71.76136f, 85.03906f, 94.86898f,
+                105.11858f, 117.41477f, 120.431816f, 131.26941f, 135.32149f, 141.45454f, 161.75568f, 171.15308f,
+                181.40268f, 189.04546f, 192.0625f, 198.04546f, 201.0625f, 210.14375f, 219.9017f, 228.26941f, 232.32149f
+            ),
+            actual = textBlob.getIntercepts(lowerBound = 0f, upperBound = 1f)!!,
+            epsilon = eps
+        )
+
+        assertFailsWith<IllegalArgumentException> { textBlob.tightBounds }
+        assertFailsWith<IllegalArgumentException> { textBlob.blockBounds }
+        assertFailsWith<IllegalArgumentException> { textBlob.firstBaseline }
+        assertFailsWith<IllegalArgumentException> { textBlob.lastBaseline }
+
+        val data = textBlob.serializeToData()
+        val blobFromData = TextBlob.makeFromData(data)!!
+        assertContentEquals(expected = glyphs, actual = blobFromData.glyphs)
+        assertContentEquals(expected = positions, actual = blobFromData.positions)
+    }
+
+    @Test // https://fiddle.skia.org/c/@Canvas_drawTextRSXform
+    fun canMakeFromRSXform() = runTest {
+
+        val glyphs = shortArrayOf(1983, 830, 1213, 1205, 638, 1231, 1326, 161, 611, 721, 721, 773, 1326)
+
+        var angle = 0f
+        var scale = 1f
+
+        val rsxForms = glyphs.map {
+            val s = sin(angle.toDouble()).toFloat() * scale
+            val c = cos(angle.toDouble()).toFloat() * scale
+            angle += .45f
+            scale += .2f
+            RSXform(scos = c, ssin = s, tx = -s * 16, ty = c * 16)
+        }.toTypedArray()
+
+        val textBlob = TextBlob.makeFromRSXform(
+            glyphs = glyphs,
+            xform = rsxForms,
+            font = inter36()
+        )!!
+
+        assertNotEquals(
+            illegal = 0,
+            actual = textBlob.uniqueId,
+            message = "uniqueId should return a non-zero value unique among all text blobs."
+        )
+
+        assertNotEquals(
+            illegal = 0,
+            actual = textBlob.uniqueId,
+            message = "uniqueId should return a non-zero value unique among all text blobs."
+        )
+
+        assertContentEquals(
+            expected = glyphs,
+            actual = textBlob.glyphs
+        )
+
+        assertContentCloseEnough(
+            expected = floatArrayOf(
+                1.0f, 0.0f, -0.0f, 16.0f, 1.0805366f, 0.52195865f, -8.351338f, 17.288586f, 0.87025404f, 1.0966578f,
+                -17.546524f, 13.924065f, 0.35041088f, 1.5611575f, -24.97852f, 5.606574f, -0.4089637f, 1.7529259f,
+                -28.046814f, -6.5434194f, -1.2563474f, 1.5561466f, -24.898346f, -20.101559f, -1.9889591f, 0.9402358f,
+                -15.043773f, -31.823345f, -2.3999155f, -0.020177627f, 0.32284203f, -38.398647f, -2.331572f, -1.1505536f,
+                18.408857f, -37.305153f, -1.7220064f, -2.2078712f, 35.32594f, -27.552103f, -0.6323875f, -2.9325907f,
+                46.92145f, -10.1182f, 0.75322014f, -3.1100905f, 49.761448f, 12.051522f, 2.1579552f, -2.6274006f,
+                42.03841f, 34.527283f
+            ),
+            actual = textBlob.positions.also { println(it.joinToString()) },
+            epsilon = eps
+        )
+
+        assertCloseEnough(
+            expected = Rect(-243.59294f, -306.74146f, 272.9392f, 173.94711f),
+            actual = textBlob.bounds,
+            epsilon = eps
+        )
+
+        // These values are not available for this textBlob
+        assertFailsWith<IllegalArgumentException> { textBlob.tightBounds }
+        assertFailsWith<IllegalArgumentException> { textBlob.blockBounds }
+        assertFailsWith<IllegalArgumentException> { textBlob.firstBaseline }
+        assertFailsWith<IllegalArgumentException> { textBlob.lastBaseline }
+
+        val data = textBlob.serializeToData()
+        val blobFromData = TextBlob.makeFromData(data)!!
+        assertContentEquals(expected = glyphs, actual = blobFromData.glyphs)
+    }
+}

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

@@ -5,6 +5,8 @@
 #include "SkSerialProcs.h"
 #include "SkTextBlob.h"
 #include "interop.hh"
+#include "mppinterop.h"
+#include "RunRecordClone.hh"
 
 static void unrefTextBlob(SkTextBlob* ptr) {
     ptr->unref();
@@ -15,11 +17,14 @@ extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_TextBlobKt_TextBlob_1
     return static_cast<jlong>(reinterpret_cast<uintptr_t>(&unrefTextBlob));
 }
 
-extern "C" JNIEXPORT jobject JNICALL Java_org_jetbrains_skia_TextBlobKt__1nBounds
-  (JNIEnv* env, jclass jclass, jlong ptr) {
+extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_TextBlobKt__1nBounds
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloatArray resultRect) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
     SkRect bounds = instance->bounds();
-    return skija::Rect::fromSkRect(env, instance->bounds());
+
+    jfloat* floats = env->GetFloatArrayElements(resultRect, 0);
+    skikoMpp::skrect::serializeAs4Floats(bounds, floats);
+    env->ReleaseFloatArrayElements(resultRect, floats, 0);
 }
 
 extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_TextBlobKt_TextBlob_1nGetUniqueId
@@ -28,25 +33,31 @@ extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_TextBlobKt_TextBlob_1n
     return instance->uniqueID();
 }
 
-extern "C" JNIEXPORT jfloatArray JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetIntercepts
+extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetInterceptsLength
   (JNIEnv* env, jclass jclass, jlong ptr, jfloat lower, jfloat upper, jlong paintPtr) {
+      SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
+      std::vector<float> bounds {lower, upper};
+      SkPaint* paint = reinterpret_cast<SkPaint*>(static_cast<uintptr_t>(paintPtr));
+      int len = instance->getIntercepts(bounds.data(), nullptr, paint);
+      return len;
+}
+extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetIntercepts
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloat lower, jfloat upper, jlong paintPtr, jfloatArray resultArray) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    std::vector<float> bounds {lower, upper};
     SkPaint* paint = reinterpret_cast<SkPaint*>(static_cast<uintptr_t>(paintPtr));
-    int len = instance->getIntercepts(bounds.data(), nullptr, paint);
-    std::vector<float> intervals(len);
-    instance->getIntercepts(bounds.data(), intervals.data(), paint);
-    return javaFloatArray(env, intervals);
+    jfloat* floats = env->GetFloatArrayElements(resultArray, 0);
+    std::vector<float> bounds {lower, upper};
+    instance->getIntercepts(bounds.data(), floats, paint);
+    env->ReleaseFloatArrayElements(resultArray, floats, 0);
 }
 
 extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_TextBlobKt__1nMakeFromPosH
-  (JNIEnv* env, jclass jclass, jshortArray glyphsArr, jfloatArray xposArr, jfloat ypos, jlong fontPtr) {
-    jsize len = env->GetArrayLength(glyphsArr);
+  (JNIEnv* env, jclass jclass, jshortArray glyphsArr, jint glyphsLen, jfloatArray xposArr, jfloat ypos, jlong fontPtr) {
     jshort* glyphs = env->GetShortArrayElements(glyphsArr, nullptr);
     jfloat* xpos = env->GetFloatArrayElements(xposArr, nullptr);
     SkFont* font = reinterpret_cast<SkFont*>(static_cast<uintptr_t>(fontPtr));
 
-    SkTextBlob* instance = SkTextBlob::MakeFromPosTextH(glyphs, len * sizeof(jshort), xpos, ypos, *font, SkTextEncoding::kGlyphID).release();
+    SkTextBlob* instance = SkTextBlob::MakeFromPosTextH(glyphs, glyphsLen * sizeof(jshort), xpos, ypos, *font, SkTextEncoding::kGlyphID).release();
 
     env->ReleaseShortArrayElements(glyphsArr, glyphs, 0);
     env->ReleaseFloatArrayElements(xposArr, xpos, 0);
@@ -55,13 +66,18 @@ extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_TextBlobKt__1nMakeFro
 }
 
 extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_TextBlobKt__1nMakeFromPos
-  (JNIEnv* env, jclass jclass, jshortArray glyphsArr, jfloatArray posArr, jlong fontPtr ) {
-    jsize len = env->GetArrayLength(glyphsArr);
+  (JNIEnv* env, jclass jclass, jshortArray glyphsArr, jint glyphsLen, jfloatArray posArr, jlong fontPtr ) {
     jshort* glyphs = env->GetShortArrayElements(glyphsArr, nullptr);
     jfloat* pos = env->GetFloatArrayElements(posArr, nullptr);
     SkFont* font = reinterpret_cast<SkFont*>(static_cast<uintptr_t>(fontPtr));
 
-    SkTextBlob* instance = SkTextBlob::MakeFromPosText(glyphs, len * sizeof(jshort), reinterpret_cast<SkPoint*>(pos), *font, SkTextEncoding::kGlyphID).release();
+    SkTextBlob* instance = SkTextBlob::MakeFromPosText(
+        glyphs,
+        glyphsLen * sizeof(jshort),
+        reinterpret_cast<SkPoint*>(pos),
+        *font,
+        SkTextEncoding::kGlyphID
+    ).release();
 
     env->ReleaseShortArrayElements(glyphsArr, glyphs, 0);
     env->ReleaseFloatArrayElements(posArr, pos, 0);
@@ -70,13 +86,12 @@ extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_TextBlobKt__1nMakeFro
 }
 
 extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_TextBlobKt__1nMakeFromRSXform
-  (JNIEnv* env, jclass jclass, jshortArray glyphsArr, jfloatArray xformArr, jlong fontPtr ) {
-    jsize len = env->GetArrayLength(glyphsArr);
+  (JNIEnv* env, jclass jclass, jshortArray glyphsArr, jint glyphsLen, jfloatArray xformArr, jlong fontPtr ) {
     jshort* glyphs = env->GetShortArrayElements(glyphsArr, nullptr);
     jfloat* xform = env->GetFloatArrayElements(xformArr, nullptr);
     SkFont* font = reinterpret_cast<SkFont*>(static_cast<uintptr_t>(fontPtr));
 
-    SkTextBlob* instance = SkTextBlob::MakeFromRSXform(glyphs, len * sizeof(jshort), reinterpret_cast<SkRSXform*>(xform), *font, SkTextEncoding::kGlyphID).release();
+    SkTextBlob* instance = SkTextBlob::MakeFromRSXform(glyphs, glyphsLen * sizeof(jshort), reinterpret_cast<SkRSXform*>(xform), *font, SkTextEncoding::kGlyphID).release();
 
     env->ReleaseShortArrayElements(glyphsArr, glyphs, 0);
     env->ReleaseFloatArrayElements(xformArr, xform, 0);
@@ -98,225 +113,93 @@ extern "C" JNIEXPORT jlong JNICALL Java_org_jetbrains_skia_TextBlobKt_TextBlob_1
     return reinterpret_cast<jlong>(instance);
 }
 
-// Must match SkTextBlobPriv.h
-//
-// Extended Textblob runs have more data after the Pos[] array:
-//
-//    -------------------------------------------------------------------------
-//    ... | RunRecord | Glyphs[] | Pos[] | TextSize | Clusters[] | Text[] | ...
-//    -------------------------------------------------------------------------
-class RunRecordClone {
-public:
-    SkFont    fFont;
-    uint32_t  fCount;
-    SkPoint   fOffset;
-    uint32_t  fFlags;
-
-    uint16_t* glyphBuffer() const {
-        // Glyphs are stored immediately following the record.
-        return reinterpret_cast<uint16_t*>(const_cast<RunRecordClone*>(this) + 1);
-    }
-
-    SkScalar* posBuffer() const {
-        // Position scalars follow the (aligned) glyph buffer.
-        return reinterpret_cast<SkScalar*>(reinterpret_cast<uint8_t*>(this->glyphBuffer()) +
-                                           SkAlign4(fCount * sizeof(uint16_t)));
-    }
-
-    uint32_t* textSizePtr() const {
-        // textSize follows the position buffer.
-        return (uint32_t*)(&this->posBuffer()[fCount * ScalarsPerGlyph(positioning())]);
-    }
-
-    uint32_t textSize() const {
-        return isExtended() ? *this->textSizePtr() : 0;
-    }
-
-    uint32_t* clusterBuffer() const {
-        // clusters follow the textSize.
-        return isExtended() ? 1 + this->textSizePtr() : nullptr;
-    }
-
-    char* textBuffer() const {
-        return isExtended()
-               ? reinterpret_cast<char*>(this->clusterBuffer() + fCount)
-               : nullptr;
-    }
-
-    uint8_t positioning() const {
-        return fFlags & 0x3; // kPositioning_Mask
-    }
-
-    bool isExtended() const {
-        return fFlags & 0x8; // kExtended_Flag
-    }
-
-    static unsigned ScalarsPerGlyph(uint8_t pos) {
-        const uint8_t gScalarsPerPositioning[] = {
-            0,  // kDefault_Positioning
-            1,  // kHorizontal_Positioning
-            2,  // kFull_Positioning
-            4,  // kRSXform_Positioning
-        };
-        return gScalarsPerPositioning[pos];
-    }
-};
-
 extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetGlyphsLength
   (JNIEnv* env, jclass jclass, jlong ptr) {
-
   SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-  SkTextBlob::Iter iter(*instance);
-  SkTextBlob::Iter::Run run;
-  jint stored = 0;
-  while (iter.next(&run)) {
-      stored += run.fGlyphCount;
-  }
-  return stored;
+  return skikoMpp::textblob::getGlyphsLength(instance);
 }
 
 extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetGlyphs
   (JNIEnv* env, jclass jclass, jlong ptr, jshortArray resultArray) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-
-    size_t stored = 0;
     jshort * shorts = env->GetShortArrayElements(resultArray, nullptr);
-    while (iter.next(&run)) {
-        memcpy(shorts + stored, run.fGlyphIndices, run.fGlyphCount * sizeof(uint16_t));
-        stored += run.fGlyphCount;
-    }
+    skikoMpp::textblob::getGlyphs(instance, reinterpret_cast<short*>(shorts));
     env->ReleaseShortArrayElements(resultArray, shorts, 0);
 }
 
-extern "C" JNIEXPORT jfloatArray JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetPositions
+extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetPositionsLength
   (JNIEnv* env, jclass jclass, jlong ptr) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-    std::vector<jfloat> positions;
-    size_t stored = 0;
-    while (iter.next(&run)) {
-        // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
-        auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
-        unsigned scalarsPerGlyph = RunRecordClone::ScalarsPerGlyph(runRecord->positioning());
-        positions.resize(stored + run.fGlyphCount * scalarsPerGlyph);
-        memcpy(&positions[stored], runRecord->posBuffer(), run.fGlyphCount * scalarsPerGlyph * sizeof(SkScalar));
-        stored += run.fGlyphCount * scalarsPerGlyph;
-    }
-    return javaFloatArray(env, positions);
+    return skikoMpp::textblob::getPositionsLength(instance);
 }
 
-extern "C" JNIEXPORT jintArray JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetClusters
-  (JNIEnv* env, jclass jclass, jlong ptr) {
+extern "C" JNIEXPORT void JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetPositions
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloatArray resultArray) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-    std::vector<jint> clusters;
-    size_t stored = 0;
-    // uint32_t cluster8 = 0;
-    uint32_t runStart16 = 0;
-    while (iter.next(&run)) {
-        // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
-        auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
-        if (!runRecord->isExtended())
-            return nullptr;
-
-        skija::UtfIndicesConverter conv(runRecord->textBuffer(), runRecord->textSize());
-        clusters.resize(stored + run.fGlyphCount);
-        uint32_t* clusterBuffer = runRecord->clusterBuffer();
-        for (int i = 0; i < run.fGlyphCount; ++i)
-            clusters[stored + i] = runStart16 + conv.from8To16(clusterBuffer[i]);
-        runStart16 += conv.from8To16(runRecord->textSize());
-        // memcpy(&clusters[stored], runRecord->clusterBuffer(), run.fGlyphCount * sizeof(uint32_t));
-
-        stored += run.fGlyphCount;
-    }
-    return javaIntArray(env, clusters);
+
+    jfloat* positions = env->GetFloatArrayElements(resultArray, 0);
+    skikoMpp::textblob::getPositions(instance, reinterpret_cast<float*>(positions));
+    env->ReleaseFloatArrayElements(resultArray, positions, 0);
 }
 
-extern "C" JNIEXPORT jobject JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetTightBounds
+extern "C" JNIEXPORT jint JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetClustersLength
   (JNIEnv* env, jclass jclass, jlong ptr) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-    auto bounds = SkRect::MakeEmpty();
-    SkRect tmpBounds;
-    while (iter.next(&run)) {
-        // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
-        auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
-        if (runRecord->positioning() != 2) // kFull_Positioning
-            return nullptr;
-
-        runRecord->fFont.measureText(runRecord->glyphBuffer(), run.fGlyphCount * sizeof(uint16_t), SkTextEncoding::kGlyphID, &tmpBounds, nullptr);
-        SkScalar* posBuffer = runRecord->posBuffer();
-        tmpBounds.offset(posBuffer[0], posBuffer[1]);
-        bounds.join(tmpBounds);
-    }
-    return skija::Rect::fromSkRect(env, bounds);
+    return skikoMpp::textblob::getClustersLength(instance);
 }
 
-extern "C" JNIEXPORT jobject JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetBlockBounds
-  (JNIEnv* env, jclass jclass, jlong ptr) {
+extern "C" JNIEXPORT jboolean JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetClusters
+  (JNIEnv* env, jclass jclass, jlong ptr, jintArray resultArray) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-    auto bounds = SkRect::MakeEmpty();
-    SkFontMetrics metrics;
-
-    while (iter.next(&run)) {
-        // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
-        auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
-        if (runRecord->positioning() != 2) // kFull_Positioning
-            return nullptr;
-
-        SkScalar* posBuffer = runRecord->posBuffer();
-        const SkFont& font = runRecord->fFont;
-        font.getMetrics(&metrics);
-
-        SkScalar lastLeft = posBuffer[(run.fGlyphCount - 1) * 2];
-        SkScalar lastWidth;
-        if (run.fGlyphCount > 1 && SkScalarNearlyEqual(posBuffer[(run.fGlyphCount - 2) * 2], lastLeft))
-            lastWidth = 0;
-        else
-            font.getWidths(&run.fGlyphIndices[run.fGlyphCount - 1], 1, &lastWidth);
-
-        auto runBounds = SkRect::MakeLTRB(posBuffer[0], posBuffer[1] + metrics.fAscent, lastLeft + lastWidth, posBuffer[1] + metrics.fDescent);
-        bounds.join(runBounds);
-    }
-    return skija::Rect::fromSkRect(env, bounds);
+
+    jint* clusters = env->GetIntArrayElements(resultArray, 0);
+    auto hasValue = skikoMpp::textblob::getClusters(instance, reinterpret_cast<int*>(clusters));
+    env->ReleaseIntArrayElements(resultArray, clusters, 0);
+
+    return hasValue;
 }
 
-extern "C" JNIEXPORT jobject JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetFirstBaseline
-  (JNIEnv* env, jclass jclass, jlong ptr) {
+extern "C" JNIEXPORT jboolean JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetTightBounds
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloatArray resultArray) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-    while (iter.next(&run)) {
-        // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
-        auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
-        if (runRecord->positioning() != 2) // kFull_Positioning
-            return nullptr;
-
-        return javaFloat(env, runRecord->posBuffer()[1]);
-    }
-    return nullptr;
+
+    auto bounds = skikoMpp::textblob::getTightBounds(instance);
+    if (!bounds) return false;
+
+    jfloat* floats = env->GetFloatArrayElements(resultArray, 0);
+    skikoMpp::skrect::serializeAs4Floats(*bounds, floats);
+    env->ReleaseFloatArrayElements(resultArray, floats, 0);
+
+    return true;
 }
 
-extern "C" JNIEXPORT jobject JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetLastBaseline
-  (JNIEnv* env, jclass jclass, jlong ptr) {
+extern "C" JNIEXPORT jboolean JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetBlockBounds
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloatArray resultArray) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
+
+    std::unique_ptr<SkRect> bounds = skikoMpp::textblob::getBlockBounds(instance);
+    if (!bounds) return false;
+
+    jfloat* floats = env->GetFloatArrayElements(resultArray, 0);
+    skikoMpp::skrect::serializeAs4Floats(*bounds, floats);
+    env->ReleaseFloatArrayElements(resultArray, floats, 0);
+    return true;
+}
+
+extern "C" JNIEXPORT jboolean JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetFirstBaseline
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloatArray resultArray) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
+    jfloat* floats = env->GetFloatArrayElements(resultArray, 0);
+    auto hasValue = skikoMpp::textblob::getFirstBaseline(instance, reinterpret_cast<float*>(floats));
+    env->ReleaseFloatArrayElements(resultArray, floats, 0);
+    return hasValue;
+}
+
+extern "C" JNIEXPORT jboolean JNICALL Java_org_jetbrains_skia_TextBlobKt__1nGetLastBaseline
+  (JNIEnv* env, jclass jclass, jlong ptr, jfloatArray resultArray) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(static_cast<uintptr_t>(ptr));
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-    SkScalar baseline = 0;
-    while (iter.next(&run)) {
-        // run.fGlyphIndices points directly to runRecord.glyphBuffer(), which comes directly after RunRecord itself
-        auto runRecord = reinterpret_cast<const RunRecordClone*>(run.fGlyphIndices) - 1;
-        if (runRecord->positioning() != 2) // kFull_Positioning
-            return nullptr;
-
-        baseline = std::max(baseline, runRecord->posBuffer()[1]);
-    }
-    return javaFloat(env, baseline);
+    jfloat* floats = env->GetFloatArrayElements(resultArray, 0);
+    auto hasValue = skikoMpp::textblob::getLastBaseline(instance, reinterpret_cast<float*>(floats));
+    env->ReleaseFloatArrayElements(resultArray, floats, 0);
+    return hasValue;
 }

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

@@ -1202,46 +1202,3 @@ namespace skija {
         }
     }
 }
-
-skija::UtfIndicesConverter::UtfIndicesConverter(const char* chars8, size_t len8):
-  fStart8(chars8),
-  fPtr8(chars8),
-  fEnd8(chars8 + len8),
-  fPos16(0)
-{}
-
-skija::UtfIndicesConverter::UtfIndicesConverter(const SkString& str):
-  skija::UtfIndicesConverter::UtfIndicesConverter(str.c_str(), str.size())
-{}
-
-size_t skija::UtfIndicesConverter::from16To8(uint32_t i16) {
-    if (i16 >= fPos16) {
-        // if new i16 >= last fPos16, continue from where we started
-    } else {
-        fPtr8 = fStart8;
-        fPos16 = 0;
-    }
-
-    while (fPtr8 < fEnd8 && fPos16 < i16) {
-        SkUnichar u = SkUTF::NextUTF8(&fPtr8, fEnd8);
-        fPos16 += (uint32_t) SkUTF::ToUTF16(u);
-    }
-
-    return fPtr8 - fStart8;
-}
-
-uint32_t skija::UtfIndicesConverter::from8To16(size_t i8) {
-    if (i8 >= (size_t) (fPtr8 - fStart8)) {
-        // if new i8 >= last fPtr8, continue from where we started
-    } else {
-        fPtr8 = fStart8;
-        fPos16 = 0;
-    }
-
-    while (fPtr8 < fEnd8 && (size_t) (fPtr8 - fStart8) < i8) {
-        SkUnichar u = SkUTF::NextUTF8(&fPtr8, fEnd8);
-        fPos16 += (uint32_t) SkUTF::ToUTF16(u);
-    }
-
-    return fPos16;
-}

skiko/src/jvmMain/cpp/common/interop.hh

@@ -18,6 +18,7 @@
 #include "SkString.h"
 #include "SkSurfaceProps.h"
 #include "TextStyle.h"
+#include "mppinterop.h"
 
 namespace java {
     namespace io {
@@ -321,20 +322,6 @@ namespace skija {
             SkSamplingOptions unpackFrom2Ints(JNIEnv* env, jint val1, jint val2);
         }
 
-    class UtfIndicesConverter {
-        public:
-            UtfIndicesConverter(const char* chars8, size_t len8);
-            UtfIndicesConverter(const SkString& s);
-
-            const char* fStart8;
-            const char* fPtr8;
-            const char* fEnd8;
-            uint32_t fPos16;
-
-            size_t from16To8(uint32_t i16);
-            uint32_t from8To16(size_t i8);
-    };
-
     namespace impl {
         namespace Native {
             extern jfieldID _ptr;

skiko/src/nativeJsMain/cpp/TextBlob.cc

@@ -7,6 +7,8 @@
 #include "SkSerialProcs.h"
 #include "SkTextBlob.h"
 #include "common.h"
+#include "RunRecordClone.hh"
+#include "mppinterop.h"
 
 static void unrefTextBlob(SkTextBlob* ptr) {
     ptr->unref();
@@ -18,9 +20,11 @@ SKIKO_EXPORT KNativePointer org_jetbrains_skia_TextBlob__1nGetFinalizer
 }
 
 
-SKIKO_EXPORT KInteropPointer org_jetbrains_skia_TextBlob__1nBounds
-  (KNativePointer ptr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nBounds");
+SKIKO_EXPORT void org_jetbrains_skia_TextBlob__1nBounds
+  (KNativePointer ptr, KInteropPointer resultFloats) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    SkRect bounds = instance->bounds();
+    skikoMpp::skrect::serializeAs4Floats(bounds, reinterpret_cast<float*>(resultFloats));
 }
 
 SKIKO_EXPORT KInt org_jetbrains_skia_TextBlob__1nGetUniqueId
@@ -29,24 +33,65 @@ SKIKO_EXPORT KInt org_jetbrains_skia_TextBlob__1nGetUniqueId
     return instance->uniqueID();
 }
 
-SKIKO_EXPORT KFloat* org_jetbrains_skia_TextBlob__1nGetIntercepts
-  (KNativePointer ptr, KFloat lower, KFloat upper, KNativePointer paintPtr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nGetIntercepts");
+SKIKO_EXPORT KInt org_jetbrains_skia_TextBlob__1nGetInterceptsLength
+    (KNativePointer ptr, KFloat lower, KFloat upper, KNativePointer paintPtr) {
+
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    SkPaint* paint = reinterpret_cast<SkPaint*>(paintPtr);
+    std::vector<float> bounds {lower, upper};
+    int len = instance->getIntercepts(bounds.data(), nullptr, paint);
+    return len;
+}
+
+SKIKO_EXPORT void org_jetbrains_skia_TextBlob__1nGetIntercepts
+  (KNativePointer ptr, KFloat lower, KFloat upper, KNativePointer paintPtr, KFloat* resultArray) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    SkPaint* paint = reinterpret_cast<SkPaint*>(paintPtr);
+    std::vector<float> bounds {lower, upper};
+    instance->getIntercepts(bounds.data(), resultArray, paint);
 }
 
 SKIKO_EXPORT KNativePointer org_jetbrains_skia_TextBlob__1nMakeFromPosH
-  (KShort* glyphsArr, KFloat* xposArr, KFloat ypos, KNativePointer fontPtr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nMakeFromPosH");
+  (KShort* glyphsArr, KInt glyphsLen, KFloat* xposArr, KFloat ypos, KNativePointer fontPtr) {
+    SkFont* font = reinterpret_cast<SkFont*>(fontPtr);
+
+    SkTextBlob* instance = SkTextBlob::MakeFromPosTextH(
+        glyphsArr,
+        glyphsLen * sizeof(short),
+        xposArr, ypos,
+        *font,
+        SkTextEncoding::kGlyphID
+    ).release();
+
+    return reinterpret_cast<KNativePointer>(instance);
 }
 
 SKIKO_EXPORT KNativePointer org_jetbrains_skia_TextBlob__1nMakeFromPos
-  (KShort* glyphsArr, KFloat* posArr, KNativePointer fontPtr ) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nMakeFromPos");
+  (KShort* glyphsArr, KInt glyphsLen, KFloat* posArr, KNativePointer fontPtr ) {
+    SkFont* font = reinterpret_cast<SkFont*>(fontPtr);
+
+    SkTextBlob* instance = SkTextBlob::MakeFromPosText(
+        glyphsArr,
+        glyphsLen * sizeof(KShort),
+        reinterpret_cast<SkPoint*>(posArr),
+        *font,
+        SkTextEncoding::kGlyphID
+    ).release();
+
+    return reinterpret_cast<KNativePointer>(instance);
 }
 
 SKIKO_EXPORT KNativePointer org_jetbrains_skia_TextBlob__1nMakeFromRSXform
-  (KShort* glyphsArr, KFloat* xformArr, KNativePointer fontPtr ) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nMakeFromRSXform");
+  (KShort* glyphsArr, KInt glyphsLen, KFloat* xformArr, KNativePointer fontPtr ) {
+   SkFont* font = reinterpret_cast<SkFont*>(fontPtr);
+
+   SkTextBlob* instance = SkTextBlob::MakeFromRSXform(
+        glyphsArr, glyphsLen * sizeof(short),
+        reinterpret_cast<SkRSXform*>(xformArr),
+        *font, SkTextEncoding::kGlyphID
+   ).release();
+
+   return reinterpret_cast<KNativePointer>(instance);
 }
 
 SKIKO_EXPORT KNativePointer org_jetbrains_skia_TextBlob__1nSerializeToData
@@ -66,54 +111,66 @@ SKIKO_EXPORT KNativePointer org_jetbrains_skia_TextBlob__1nMakeFromData
 SKIKO_EXPORT KInt org_jetbrains_skia_TextBlob__1nGetGlyphsLength
   (KNativePointer ptr) {
       SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
-      SkTextBlob::Iter iter(*instance);
-      SkTextBlob::Iter::Run run;
-      int stored = 0;
-      while (iter.next(&run)) {
-          stored += run.fGlyphCount;
-      }
-      return stored;
+      return skikoMpp::textblob::getGlyphsLength(instance);
 }
 
 SKIKO_EXPORT void org_jetbrains_skia_TextBlob__1nGetGlyphs
   (KNativePointer ptr, KShort* resultArray) {
     SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
-    SkTextBlob::Iter iter(*instance);
-    SkTextBlob::Iter::Run run;
-
-    size_t stored = 0;
-    while (iter.next(&run)) {
-        memcpy(resultArray + stored, run.fGlyphIndices, run.fGlyphCount * sizeof(uint16_t));
-        stored += run.fGlyphCount;
-    }
+    skikoMpp::textblob::getGlyphs(instance, resultArray);
 }
 
-SKIKO_EXPORT KFloat* org_jetbrains_skia_TextBlob__1nGetPositions
+SKIKO_EXPORT KInt org_jetbrains_skia_TextBlob__1nGetPositionsLength
   (KNativePointer ptr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nGetPositions");
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    return skikoMpp::textblob::getPositionsLength(instance);
 }
 
-SKIKO_EXPORT KInt* org_jetbrains_skia_TextBlob__1nGetClusters
-  (KNativePointer ptr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nGetClusters");
+SKIKO_EXPORT void org_jetbrains_skia_TextBlob__1nGetPositions
+  (KNativePointer ptr, KFloat* resultArray) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    skikoMpp::textblob::getPositions(instance, resultArray);
 }
 
-SKIKO_EXPORT KInteropPointer org_jetbrains_skia_TextBlob__1nGetTightBounds
+SKIKO_EXPORT KInt org_jetbrains_skia_TextBlob__1nGetClustersLength
   (KNativePointer ptr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nGetTightBounds");
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    return skikoMpp::textblob::getClustersLength(instance);
 }
 
-SKIKO_EXPORT KInteropPointer org_jetbrains_skia_TextBlob__1nGetBlockBounds
-  (KNativePointer ptr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nGetBlockBounds");
+SKIKO_EXPORT KBoolean org_jetbrains_skia_TextBlob__1nGetClusters
+  (KNativePointer ptr, KInt* clusters) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    return skikoMpp::textblob::getClusters(instance, clusters);
 }
 
-SKIKO_EXPORT KInteropPointer org_jetbrains_skia_TextBlob__1nGetFirstBaseline
-  (KNativePointer ptr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nGetFirstBaseline");
+SKIKO_EXPORT KBoolean org_jetbrains_skia_TextBlob__1nGetTightBounds
+  (KNativePointer ptr, KFloat* resultArray) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+
+    auto bounds = skikoMpp::textblob::getTightBounds(instance);
+    if (!bounds) return false;
+
+    skikoMpp::skrect::serializeAs4Floats(*bounds, resultArray);
+
+    return true;
 }
 
-SKIKO_EXPORT KInteropPointer org_jetbrains_skia_TextBlob__1nGetLastBaseline
-  (KNativePointer ptr) {
-    TODO("implement org_jetbrains_skia_TextBlob__1nGetLastBaseline");
+SKIKO_EXPORT KBoolean org_jetbrains_skia_TextBlob__1nGetBlockBounds
+  (KNativePointer ptr, KFloat* resultArray) {
+    SkTextBlob* instance = reinterpret_cast<SkTextBlob*>(ptr);
+    std::unique_ptr<SkRect> bounds = skikoMpp::textblob::getBlockBounds(instance);
+    if (!bounds) return false;
+    skikoMpp::skrect::serializeAs4Floats(*bounds, resultArray);
+    return true;
+}
+
+SKIKO_EXPORT KBoolean org_jetbrains_skia_TextBlob__1nGetFirstBaseline
+  (KNativePointer ptr, KFloat* resultArray) {
+  return skikoMpp::textblob::getFirstBaseline(reinterpret_cast<SkTextBlob*>(ptr), resultArray);
+}
+
+SKIKO_EXPORT KBoolean org_jetbrains_skia_TextBlob__1nGetLastBaseline
+  (KNativePointer ptr, KFloat* resultArray) {
+  return skikoMpp::textblob::getLastBaseline(reinterpret_cast<SkTextBlob*>(ptr), resultArray);
 }

skiko/src/nativeJsMain/cpp/common.h

@@ -25,6 +25,7 @@
 #include "SkShaper.h"
 #include "SkLoadICU.h"
 #include "unicode/ubrk.h"
+#include "mppinterop.h"
 
 #include "types.h"
 
@@ -40,20 +41,6 @@ namespace skija {
         SkSamplingOptions unpackFrom2Ints(KInt val1, KInt val2);
     }
 
-    class UtfIndicesConverter {
-    public:
-        UtfIndicesConverter(const char* chars8, size_t len8);
-        UtfIndicesConverter(const SkString& s);
-
-        const char* fStart8;
-        const char* fPtr8;
-        const char* fEnd8;
-        uint32_t fPos16;
-
-        size_t from16To8(uint32_t i16);
-        uint32_t from8To16(size_t i8);
-    };
-
     namespace Rect {
         void copyToInterop(const SkRect& rect, KInteropPointer pointer);
     }

skiko/src/nativeJsMain/cpp/common_interop.cc

@@ -116,49 +116,6 @@ namespace skija {
     }
 }
 
-skija::UtfIndicesConverter::UtfIndicesConverter(const char* chars8, size_t len8):
-  fStart8(chars8),
-  fPtr8(chars8),
-  fEnd8(chars8 + len8),
-  fPos16(0)
-{}
-
-skija::UtfIndicesConverter::UtfIndicesConverter(const SkString& str):
-  skija::UtfIndicesConverter::UtfIndicesConverter(str.c_str(), str.size())
-{}
-
-size_t skija::UtfIndicesConverter::from16To8(uint32_t i16) {
-    if (i16 >= fPos16) {
-        // if new i16 >= last fPos16, continue from where we started
-    } else {
-        fPtr8 = fStart8;
-        fPos16 = 0;
-    }
-
-    while (fPtr8 < fEnd8 && fPos16 < i16) {
-        SkUnichar u = SkUTF::NextUTF8(&fPtr8, fEnd8);
-        fPos16 += (uint32_t) SkUTF::ToUTF16(u);
-    }
-
-    return fPtr8 - fStart8;
-}
-
-uint32_t skija::UtfIndicesConverter::from8To16(size_t i8) {
-    if (i8 >= (size_t) (fPtr8 - fStart8)) {
-        // if new i8 >= last fPtr8, continue from where we started
-    } else {
-        fPtr8 = fStart8;
-        fPos16 = 0;
-    }
-
-    while (fPtr8 < fEnd8 && (size_t) (fPtr8 - fStart8) < i8) {
-        SkUnichar u = SkUTF::NextUTF8(&fPtr8, fEnd8);
-        fPos16 += (uint32_t) SkUTF::ToUTF16(u);
-    }
-
-    return fPos16;
-}
-
 void TODO(const char* message) {
     printf("TODO: %s\n", message);
     fflush(stdout);