Merge Android R (rvc-dev-plus-aosp-without-vendor@6692709)

Bug: 166295507
Merged-In: I3d92a6de21a938f6b352ec26dc23420c0fe02b27
Change-Id: Ifdb80563ef042738778ebb8a7581a97c4e3d96e2

1 files changed, 1159 insertions, 0 deletions

diff --git a/libs/hwui/jni/Paint.cpp b/libs/hwui/jni/Paint.cpp
new file mode 100644
index 000000000000..df8635a8fe5a
--- /dev/null
+++ b/libs/hwui/jni/Paint.cpp
@@ -0,0 +1,1159 @@
+/* libs/android_runtime/android/graphics/Paint.cpp
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+#undef LOG_TAG
+#define LOG_TAG "Paint"
+
+#include <utils/Log.h>
+
+#include "GraphicsJNI.h"
+#include <nativehelper/ScopedStringChars.h>
+#include <nativehelper/ScopedUtfChars.h>
+#include <nativehelper/ScopedPrimitiveArray.h>
+
+#include "SkBlurDrawLooper.h"
+#include "SkColorFilter.h"
+#include "SkFont.h"
+#include "SkFontMetrics.h"
+#include "SkFontTypes.h"
+#include "SkMaskFilter.h"
+#include "SkPath.h"
+#include "SkPathEffect.h"
+#include "SkShader.h"
+#include "SkBlendMode.h"
+#include "unicode/uloc.h"
+#include "unicode/ushape.h"
+#include "utils/Blur.h"
+
+#include <hwui/MinikinSkia.h>
+#include <hwui/MinikinUtils.h>
+#include <hwui/Paint.h>
+#include <hwui/Typeface.h>
+#include <minikin/GraphemeBreak.h>
+#include <minikin/LocaleList.h>
+#include <minikin/Measurement.h>
+#include <minikin/MinikinPaint.h>
+#include <unicode/utf16.h>
+
+#include <cassert>
+#include <cstring>
+#include <memory>
+#include <vector>
+
+namespace android {
+
+struct JMetricsID {
+    jfieldID    top;
+    jfieldID    ascent;
+    jfieldID    descent;
+    jfieldID    bottom;
+    jfieldID    leading;
+};
+
+static jclass   gFontMetrics_class;
+static JMetricsID gFontMetrics_fieldID;
+
+static jclass   gFontMetricsInt_class;
+static JMetricsID gFontMetricsInt_fieldID;
+
+static void getPosTextPath(const SkFont& font, const uint16_t glyphs[], int count,
+                           const SkPoint pos[], SkPath* dst) {
+    dst->reset();
+    struct Rec {
+        SkPath* fDst;
+        const SkPoint* fPos;
+    } rec = { dst, pos };
+    font.getPaths(glyphs, count, [](const SkPath* src, const SkMatrix& mx, void* ctx) {
+        Rec* rec = (Rec*)ctx;
+        if (src) {
+            SkMatrix tmp(mx);
+            tmp.postTranslate(rec->fPos->fX, rec->fPos->fY);
+            rec->fDst->addPath(*src, tmp);
+        }
+        rec->fPos += 1;
+    }, &rec);
+}
+
+namespace PaintGlue {
+    enum MoveOpt {
+        AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT
+    };
+
+    static void deletePaint(Paint* paint) {
+        delete paint;
+    }
+
+    static jlong getNativeFinalizer(JNIEnv*, jobject) {
+        return static_cast<jlong>(reinterpret_cast<uintptr_t>(&deletePaint));
+    }
+
+    static jlong init(JNIEnv* env, jobject) {
+        return reinterpret_cast<jlong>(new Paint);
+    }
+
+    static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        Paint* obj = new Paint(*paint);
+        return reinterpret_cast<jlong>(obj);
+    }
+
+    static int breakText(JNIEnv* env, const Paint& paint, const Typeface* typeface,
+            const jchar text[], int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured,
+            const bool forwardScan) {
+        size_t measuredCount = 0;
+        float measured = 0;
+
+        std::unique_ptr<float[]> advancesArray(new float[count]);
+        MinikinUtils::measureText(&paint, static_cast<minikin::Bidi>(bidiFlags), typeface, text,
+                0, count, count, advancesArray.get());
+
+        for (int i = 0; i < count; i++) {
+            // traverse in the given direction
+            int index = forwardScan ? i : (count - i - 1);
+            float width = advancesArray[index];
+            if (measured + width > maxWidth) {
+                break;
+            }
+            // properly handle clusters when scanning backwards
+            if (forwardScan || width != 0.0f) {
+                measuredCount = i + 1;
+            }
+            measured += width;
+        }
+
+        if (jmeasured && env->GetArrayLength(jmeasured) > 0) {
+            AutoJavaFloatArray autoMeasured(env, jmeasured, 1);
+            jfloat* array = autoMeasured.ptr();
+            array[0] = measured;
+        }
+        return measuredCount;
+    }
+
+    static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray jtext,
+            jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
+        NPE_CHECK_RETURN_ZERO(env, jtext);
+
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+
+        bool forwardTextDirection;
+        if (count < 0) {
+            forwardTextDirection = false;
+            count = -count;
+        }
+        else {
+            forwardTextDirection = true;
+        }
+
+        if ((index < 0) || (index + count > env->GetArrayLength(jtext))) {
+            doThrowAIOOBE(env);
+            return 0;
+        }
+
+        const jchar* text = env->GetCharArrayElements(jtext, nullptr);
+        count = breakText(env, *paint, typeface, text + index, count, maxWidth,
+                          bidiFlags, jmeasuredWidth, forwardTextDirection);
+        env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text),
+                                      JNI_ABORT);
+        return count;
+    }
+
+    static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jstring jtext,
+            jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) {
+        NPE_CHECK_RETURN_ZERO(env, jtext);
+
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+
+        int count = env->GetStringLength(jtext);
+        const jchar* text = env->GetStringChars(jtext, nullptr);
+        count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, forwards);
+        env->ReleaseStringChars(jtext, text);
+        return count;
+    }
+
+    static jfloat doTextAdvances(JNIEnv *env, Paint *paint, const Typeface* typeface,
+            const jchar *text, jint start, jint count, jint contextCount, jint bidiFlags,
+            jfloatArray advances, jint advancesIndex) {
+        NPE_CHECK_RETURN_ZERO(env, text);
+
+        if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) {
+            doThrowAIOOBE(env);
+            return 0;
+        }
+        if (count == 0) {
+            return 0;
+        }
+        if (advances) {
+            size_t advancesLength = env->GetArrayLength(advances);
+            if ((size_t)(count  + advancesIndex) > advancesLength) {
+                doThrowAIOOBE(env);
+                return 0;
+            }
+        }
+        std::unique_ptr<jfloat[]> advancesArray;
+        if (advances) {
+            advancesArray.reset(new jfloat[count]);
+        }
+        const float advance = MinikinUtils::measureText(paint,
+                static_cast<minikin::Bidi>(bidiFlags), typeface, text, start, count, contextCount,
+                advancesArray.get());
+        if (advances) {
+            env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray.get());
+        }
+        return advance;
+    }
+
+    static jfloat getTextAdvances___CIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
+            jcharArray text, jint index, jint count, jint contextIndex, jint contextCount,
+            jint bidiFlags, jfloatArray advances, jint advancesIndex) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        jchar* textArray = env->GetCharArrayElements(text, nullptr);
+        jfloat result = doTextAdvances(env, paint, typeface, textArray + contextIndex,
+                index - contextIndex, count, contextCount, bidiFlags, advances, advancesIndex);
+        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
+        return result;
+    }
+
+    static jfloat getTextAdvances__StringIIIII_FI(JNIEnv* env, jobject clazz, jlong paintHandle,
+            jstring text, jint start, jint end, jint contextStart, jint contextEnd, jint bidiFlags,
+            jfloatArray advances, jint advancesIndex) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        const jchar* textArray = env->GetStringChars(text, nullptr);
+        jfloat result = doTextAdvances(env, paint, typeface, textArray + contextStart,
+                start - contextStart, end - start, contextEnd - contextStart, bidiFlags,
+                advances, advancesIndex);
+        env->ReleaseStringChars(text, textArray);
+        return result;
+    }
+
+    static jint doTextRunCursor(JNIEnv *env, Paint* paint, const Typeface* typeface,
+            const jchar *text, jint start, jint count, jint dir, jint offset, jint opt) {
+        minikin::GraphemeBreak::MoveOpt moveOpt = minikin::GraphemeBreak::MoveOpt(opt);
+        minikin::Bidi bidiFlags = dir == 1 ? minikin::Bidi::FORCE_RTL : minikin::Bidi::FORCE_LTR;
+        std::unique_ptr<float[]> advancesArray(new float[count]);
+        MinikinUtils::measureText(paint, bidiFlags, typeface, text, start, count, start + count,
+                advancesArray.get());
+        size_t result = minikin::GraphemeBreak::getTextRunCursor(advancesArray.get(), text,
+                start, count, offset, moveOpt);
+        return static_cast<jint>(result);
+    }
+
+    static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text,
+            jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        jchar* textArray = env->GetCharArrayElements(text, nullptr);
+        jint result = doTextRunCursor(env, paint, typeface, textArray,
+                contextStart, contextCount, dir, offset, cursorOpt);
+        env->ReleaseCharArrayElements(text, textArray, JNI_ABORT);
+        return result;
+    }
+
+    static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle,
+            jstring text, jint contextStart, jint contextEnd, jint dir, jint offset,
+            jint cursorOpt) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        const jchar* textArray = env->GetStringChars(text, nullptr);
+        jint result = doTextRunCursor(env, paint, typeface, textArray,
+                contextStart, contextEnd - contextStart, dir, offset, cursorOpt);
+        env->ReleaseStringChars(text, textArray);
+        return result;
+    }
+
+    class GetTextFunctor {
+    public:
+        GetTextFunctor(const minikin::Layout& layout, SkPath* path, jfloat x, jfloat y,
+                    Paint* paint, uint16_t* glyphs, SkPoint* pos)
+                : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) {
+        }
+
+        void operator()(size_t start, size_t end) {
+            for (size_t i = start; i < end; i++) {
+                glyphs[i] = layout.getGlyphId(i);
+                pos[i].fX = x + layout.getX(i);
+                pos[i].fY = y + layout.getY(i);
+            }
+            const SkFont& font = paint->getSkFont();
+            if (start == 0) {
+                getPosTextPath(font, glyphs, end, pos, path);
+            } else {
+                getPosTextPath(font, glyphs + start, end - start, pos + start, &tmpPath);
+                path->addPath(tmpPath);
+            }
+        }
+    private:
+        const minikin::Layout& layout;
+        SkPath* path;
+        jfloat x;
+        jfloat y;
+        Paint* paint;
+        uint16_t* glyphs;
+        SkPoint* pos;
+        SkPath tmpPath;
+    };
+
+    static void getTextPath(JNIEnv* env, Paint* paint, const Typeface* typeface, const jchar* text,
+            jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) {
+        minikin::Layout layout = MinikinUtils::doLayout(
+                paint, static_cast<minikin::Bidi>(bidiFlags), typeface,
+                text, count,  // text buffer
+                0, count,  // draw range
+                0, count,  // context range
+                nullptr);
+        size_t nGlyphs = layout.nGlyphs();
+        uint16_t* glyphs = new uint16_t[nGlyphs];
+        SkPoint* pos = new SkPoint[nGlyphs];
+
+        x += MinikinUtils::xOffsetForTextAlign(paint, layout);
+        Paint::Align align = paint->getTextAlign();
+        paint->setTextAlign(Paint::kLeft_Align);
+        GetTextFunctor f(layout, path, x, y, paint, glyphs, pos);
+        MinikinUtils::forFontRun(layout, paint, f);
+        paint->setTextAlign(align);
+        delete[] glyphs;
+        delete[] pos;
+    }
+
+    static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags,
+            jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
+        const jchar* textArray = env->GetCharArrayElements(text, nullptr);
+        getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path);
+        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT);
+    }
+
+    static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle, jint bidiFlags,
+            jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        SkPath* path = reinterpret_cast<SkPath*>(pathHandle);
+        const jchar* textArray = env->GetStringChars(text, nullptr);
+        getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path);
+        env->ReleaseStringChars(text, textArray);
+    }
+
+    static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds,
+            const Paint& paint, const Typeface* typeface, jint bidiFlags) {
+        SkRect  r;
+        SkIRect ir;
+
+        minikin::Layout layout = MinikinUtils::doLayout(&paint,
+                static_cast<minikin::Bidi>(bidiFlags), typeface,
+                text, count,  // text buffer
+                0, count,  // draw range
+                0, count,  // context range
+                nullptr);
+        minikin::MinikinRect rect;
+        layout.getBounds(&rect);
+        r.fLeft = rect.mLeft;
+        r.fTop = rect.mTop;
+        r.fRight = rect.mRight;
+        r.fBottom = rect.mBottom;
+        r.roundOut(&ir);
+        GraphicsJNI::irect_to_jrect(ir, env, bounds);
+    }
+
+    static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jstring text, jint start,
+            jint end, jint bidiFlags, jobject bounds) {
+        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        const jchar* textArray = env->GetStringChars(text, nullptr);
+        doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags);
+        env->ReleaseStringChars(text, textArray);
+    }
+
+    static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jcharArray text,
+            jint index, jint count, jint bidiFlags, jobject bounds) {
+        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        const jchar* textArray = env->GetCharArrayElements(text, nullptr);
+        doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags);
+        env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray),
+                                      JNI_ABORT);
+    }
+
+    // Returns true if the given string is exact one pair of regional indicators.
+    static bool isFlag(const jchar* str, size_t length) {
+        const jchar RI_LEAD_SURROGATE = 0xD83C;
+        const jchar RI_TRAIL_SURROGATE_MIN = 0xDDE6;
+        const jchar RI_TRAIL_SURROGATE_MAX = 0xDDFF;
+
+        if (length != 4) {
+            return false;
+        }
+        if (str[0] != RI_LEAD_SURROGATE || str[2] != RI_LEAD_SURROGATE) {
+            return false;
+        }
+        return RI_TRAIL_SURROGATE_MIN <= str[1] && str[1] <= RI_TRAIL_SURROGATE_MAX &&
+            RI_TRAIL_SURROGATE_MIN <= str[3] && str[3] <= RI_TRAIL_SURROGATE_MAX;
+    }
+
+    static jboolean layoutContainsNotdef(const minikin::Layout& layout) {
+        for (size_t i = 0; i < layout.nGlyphs(); i++) {
+            if (layout.getGlyphId(i) == 0) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    // Don't count glyphs that are the recommended "space" glyph and are zero width.
+    // This logic makes assumptions about HarfBuzz layout, but does correctly handle
+    // cases where ligatures form and zero width space glyphs are left in as
+    // placeholders.
+    static size_t countNonSpaceGlyphs(const minikin::Layout& layout) {
+        size_t count = 0;
+        static unsigned int kSpaceGlyphId = 3;
+        for (size_t i = 0; i < layout.nGlyphs(); i++) {
+            if (layout.getGlyphId(i) != kSpaceGlyphId || layout.getCharAdvance(i) != 0.0) {
+                count++;
+            }
+        }
+        return count;
+    }
+
+    static jboolean hasGlyph(JNIEnv *env, jclass, jlong paintHandle, jint bidiFlags,
+            jstring string) {
+        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        ScopedStringChars str(env, string);
+
+        /* Start by rejecting unsupported base code point and variation selector pairs. */
+        size_t nChars = 0;
+        const uint32_t kStartOfString = 0xFFFFFFFF;
+        uint32_t prevCp = kStartOfString;
+        for (size_t i = 0; i < str.size(); i++) {
+            jchar cu = str[i];
+            uint32_t cp = cu;
+            if (U16_IS_TRAIL(cu)) {
+                // invalid UTF-16, unpaired trailing surrogate
+                return false;
+            } else if (U16_IS_LEAD(cu)) {
+                if (i + 1 == str.size()) {
+                    // invalid UTF-16, unpaired leading surrogate at end of string
+                    return false;
+                }
+                i++;
+                jchar cu2 = str[i];
+                if (!U16_IS_TRAIL(cu2)) {
+                    // invalid UTF-16, unpaired leading surrogate
+                    return false;
+                }
+                cp = U16_GET_SUPPLEMENTARY(cu, cu2);
+            }
+
+            if (prevCp != kStartOfString &&
+                ((0xFE00 <= cp && cp <= 0xFE0F) || (0xE0100 <= cp && cp <= 0xE01EF))) {
+                bool hasVS = MinikinUtils::hasVariationSelector(typeface, prevCp, cp);
+                if (!hasVS) {
+                    // No font has a glyph for the code point and variation selector pair.
+                    return false;
+                } else if (nChars == 1 && i + 1 == str.size()) {
+                    // The string is just a codepoint and a VS, we have an authoritative answer
+                    return true;
+                }
+            }
+            nChars++;
+            prevCp = cp;
+        }
+        minikin::Layout layout = MinikinUtils::doLayout(paint,
+                static_cast<minikin::Bidi>(bidiFlags), typeface,
+                str.get(), str.size(),  // text buffer
+                0, str.size(),  // draw range
+                0, str.size(),  // context range
+                nullptr);
+        size_t nGlyphs = countNonSpaceGlyphs(layout);
+        if (nGlyphs != 1 && nChars > 1) {
+            // multiple-character input, and was not a ligature
+            // TODO: handle ZWJ/ZWNJ characters specially so we can detect certain ligatures
+            // in joining scripts, such as Arabic and Mongolian.
+            return false;
+        }
+
+        if (nGlyphs == 0 || layoutContainsNotdef(layout)) {
+            return false;  // The collection doesn't have a glyph.
+        }
+
+        if (nChars == 2 && isFlag(str.get(), str.size())) {
+            // Some font may have a special glyph for unsupported regional indicator pairs.
+            // To return false for this case, need to compare the glyph id with the one of ZZ
+            // since ZZ is reserved for unknown or invalid territory.
+            // U+1F1FF (REGIONAL INDICATOR SYMBOL LETTER Z) is \uD83C\uDDFF in UTF16.
+            static const jchar ZZ_FLAG_STR[] = { 0xD83C, 0xDDFF, 0xD83C, 0xDDFF };
+            minikin::Layout zzLayout = MinikinUtils::doLayout(paint,
+                    static_cast<minikin::Bidi>(bidiFlags), typeface,
+                    ZZ_FLAG_STR, 4,  // text buffer
+                    0, 4,  // draw range
+                    0, 4,  // context range
+                    nullptr);
+            if (zzLayout.nGlyphs() != 1 || layoutContainsNotdef(zzLayout)) {
+                // The font collection doesn't have a glyph for unknown flag. Just return true.
+                return true;
+            }
+            return zzLayout.getGlyphId(0) != layout.getGlyphId(0);
+        }
+        return true;
+    }
+
+    static jfloat doRunAdvance(const Paint* paint, const Typeface* typeface, const jchar buf[],
+            jint start, jint count, jint bufSize, jboolean isRtl, jint offset) {
+        minikin::Bidi bidiFlags = isRtl ? minikin::Bidi::FORCE_RTL : minikin::Bidi::FORCE_LTR;
+        if (offset == start + count) {
+            return MinikinUtils::measureText(paint, bidiFlags, typeface, buf, start, count,
+                    bufSize, nullptr);
+        }
+        std::unique_ptr<float[]> advancesArray(new float[count]);
+        MinikinUtils::measureText(paint, bidiFlags, typeface, buf, start, count, bufSize,
+                advancesArray.get());
+        return minikin::getRunAdvance(advancesArray.get(), buf, start, count, offset);
+    }
+
+    static jfloat getRunAdvance___CIIIIZI_F(JNIEnv *env, jclass, jlong paintHandle, jcharArray text,
+            jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl, jint offset) {
+        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        ScopedCharArrayRO textArray(env, text);
+        jfloat result = doRunAdvance(paint, typeface, textArray.get() + contextStart,
+                start - contextStart, end - start, contextEnd - contextStart, isRtl,
+                offset - contextStart);
+        return result;
+    }
+
+    static jint doOffsetForAdvance(const Paint* paint, const Typeface* typeface, const jchar buf[],
+            jint start, jint count, jint bufSize, jboolean isRtl, jfloat advance) {
+        minikin::Bidi bidiFlags = isRtl ? minikin::Bidi::FORCE_RTL : minikin::Bidi::FORCE_LTR;
+        std::unique_ptr<float[]> advancesArray(new float[count]);
+        MinikinUtils::measureText(paint, bidiFlags, typeface, buf, start, count, bufSize,
+                advancesArray.get());
+        return minikin::getOffsetForAdvance(advancesArray.get(), buf, start, count, advance);
+    }
+
+    static jint getOffsetForAdvance___CIIIIZF_I(JNIEnv *env, jclass, jlong paintHandle,
+            jcharArray text, jint start, jint end, jint contextStart, jint contextEnd,
+            jboolean isRtl, jfloat advance) {
+        const Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        const Typeface* typeface = paint->getAndroidTypeface();
+        ScopedCharArrayRO textArray(env, text);
+        jint result = doOffsetForAdvance(paint, typeface, textArray.get() + contextStart,
+                start - contextStart, end - start, contextEnd - contextStart, isRtl, advance);
+        result += contextStart;
+        return result;
+    }
+
+    // ------------------ @FastNative ---------------------------
+
+    static jint setTextLocales(JNIEnv* env, jobject clazz, jlong objHandle, jstring locales) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        ScopedUtfChars localesChars(env, locales);
+        jint minikinLocaleListId = minikin::registerLocaleList(localesChars.c_str());
+        obj->setMinikinLocaleListId(minikinLocaleListId);
+        return minikinLocaleListId;
+    }
+
+    static void setFontFeatureSettings(JNIEnv* env, jobject clazz, jlong paintHandle, jstring settings) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        if (!settings) {
+            paint->setFontFeatureSettings(std::string());
+        } else {
+            ScopedUtfChars settingsChars(env, settings);
+            paint->setFontFeatureSettings(std::string(settingsChars.c_str(), settingsChars.size()));
+        }
+    }
+
+    static SkScalar getMetricsInternal(jlong paintHandle, SkFontMetrics *metrics) {
+        const int kElegantTop = 2500;
+        const int kElegantBottom = -1000;
+        const int kElegantAscent = 1900;
+        const int kElegantDescent = -500;
+        const int kElegantLeading = 0;
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        SkFont* font = &paint->getSkFont();
+        const Typeface* typeface = paint->getAndroidTypeface();
+        typeface = Typeface::resolveDefault(typeface);
+        minikin::FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle);
+        float saveSkewX = font->getSkewX();
+        bool savefakeBold = font->isEmbolden();
+        MinikinFontSkia::populateSkFont(font, baseFont.font->typeface().get(), baseFont.fakery);
+        SkScalar spacing = font->getMetrics(metrics);
+        // The populateSkPaint call may have changed fake bold / text skew
+        // because we want to measure with those effects applied, so now
+        // restore the original settings.
+        font->setSkewX(saveSkewX);
+        font->setEmbolden(savefakeBold);
+        if (paint->getFamilyVariant() == minikin::FamilyVariant::ELEGANT) {
+            SkScalar size = font->getSize();
+            metrics->fTop = -size * kElegantTop / 2048;
+            metrics->fBottom = -size * kElegantBottom / 2048;
+            metrics->fAscent = -size * kElegantAscent / 2048;
+            metrics->fDescent = -size * kElegantDescent / 2048;
+            metrics->fLeading = size * kElegantLeading / 2048;
+            spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading;
+        }
+        return spacing;
+    }
+
+    static jfloat getFontMetrics(JNIEnv* env, jobject, jlong paintHandle, jobject metricsObj) {
+        SkFontMetrics metrics;
+        SkScalar spacing = getMetricsInternal(paintHandle, &metrics);
+
+        if (metricsObj) {
+            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class));
+            env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop));
+            env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent));
+            env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent));
+            env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom));
+            env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading));
+        }
+        return SkScalarToFloat(spacing);
+    }
+
+    static jint getFontMetricsInt(JNIEnv* env, jobject, jlong paintHandle, jobject metricsObj) {
+        SkFontMetrics metrics;
+
+        getMetricsInternal(paintHandle, &metrics);
+        int ascent = SkScalarRoundToInt(metrics.fAscent);
+        int descent = SkScalarRoundToInt(metrics.fDescent);
+        int leading = SkScalarRoundToInt(metrics.fLeading);
+
+        if (metricsObj) {
+            SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class));
+            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop));
+            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent);
+            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent);
+            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom));
+            env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading);
+        }
+        return descent - ascent + leading;
+    }
+
+
+    // ------------------ @CriticalNative ---------------------------
+
+    static void reset(CRITICAL_JNI_PARAMS_COMMA jlong objHandle) {
+        reinterpret_cast<Paint*>(objHandle)->reset();
+    }
+
+    static void assign(CRITICAL_JNI_PARAMS_COMMA jlong dstPaintHandle, jlong srcPaintHandle) {
+        Paint* dst = reinterpret_cast<Paint*>(dstPaintHandle);
+        const Paint* src = reinterpret_cast<Paint*>(srcPaintHandle);
+        *dst = *src;
+    }
+
+    static jint getFlags(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        uint32_t flags = reinterpret_cast<Paint*>(paintHandle)->getJavaFlags();
+        return static_cast<jint>(flags);
+    }
+
+    static void setFlags(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint flags) {
+        reinterpret_cast<Paint*>(paintHandle)->setJavaFlags(flags);
+    }
+
+    static jint getHinting(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        return (SkFontHinting)reinterpret_cast<Paint*>(paintHandle)->getSkFont().getHinting()
+                == SkFontHinting::kNone ? 0 : 1;
+    }
+
+    static void setHinting(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint mode) {
+        reinterpret_cast<Paint*>(paintHandle)->getSkFont().setHinting(
+                mode == 0 ? SkFontHinting::kNone : SkFontHinting::kNormal);
+    }
+
+    static void setAntiAlias(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean aa) {
+        reinterpret_cast<Paint*>(paintHandle)->setAntiAlias(aa);
+    }
+
+    static void setLinearText(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean linearText) {
+        reinterpret_cast<Paint*>(paintHandle)->getSkFont().setLinearMetrics(linearText);
+    }
+
+    static void setSubpixelText(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean subpixelText) {
+        reinterpret_cast<Paint*>(paintHandle)->getSkFont().setSubpixel(subpixelText);
+    }
+
+    static void setUnderlineText(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean underlineText) {
+        reinterpret_cast<Paint*>(paintHandle)->setUnderline(underlineText);
+    }
+
+    static void setStrikeThruText(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean strikeThruText) {
+        reinterpret_cast<Paint*>(paintHandle)->setStrikeThru(strikeThruText);
+    }
+
+    static void setFakeBoldText(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean fakeBoldText) {
+        reinterpret_cast<Paint*>(paintHandle)->getSkFont().setEmbolden(fakeBoldText);
+    }
+
+    static void setFilterBitmap(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean filterBitmap) {
+        reinterpret_cast<Paint*>(paintHandle)->setFilterQuality(
+                filterBitmap ? kLow_SkFilterQuality : kNone_SkFilterQuality);
+    }
+
+    static void setDither(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean dither) {
+        reinterpret_cast<Paint*>(paintHandle)->setDither(dither);
+    }
+
+    static jint getStyle(CRITICAL_JNI_PARAMS_COMMA jlong objHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        return static_cast<jint>(obj->getStyle());
+    }
+
+    static void setStyle(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jint styleHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        Paint::Style style = static_cast<Paint::Style>(styleHandle);
+        obj->setStyle(style);
+    }
+
+    static void setColorLong(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jlong colorSpaceHandle,
+            jlong colorLong) {
+        SkColor4f color = GraphicsJNI::convertColorLong(colorLong);
+        sk_sp<SkColorSpace> cs = GraphicsJNI::getNativeColorSpace(colorSpaceHandle);
+        reinterpret_cast<Paint*>(paintHandle)->setColor4f(color, cs.get());
+    }
+
+    static void setColor(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint color) {
+        reinterpret_cast<Paint*>(paintHandle)->setColor(color);
+    }
+
+    static void setAlpha(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint a) {
+        reinterpret_cast<Paint*>(paintHandle)->setAlpha(a);
+    }
+
+    static jfloat getStrokeWidth(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getStrokeWidth());
+    }
+
+    static void setStrokeWidth(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat width) {
+        reinterpret_cast<Paint*>(paintHandle)->setStrokeWidth(width);
+    }
+
+    static jfloat getStrokeMiter(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getStrokeMiter());
+    }
+
+    static void setStrokeMiter(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat miter) {
+        reinterpret_cast<Paint*>(paintHandle)->setStrokeMiter(miter);
+    }
+
+    static jint getStrokeCap(CRITICAL_JNI_PARAMS_COMMA jlong objHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        return static_cast<jint>(obj->getStrokeCap());
+    }
+
+    static void setStrokeCap(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jint capHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        Paint::Cap cap = static_cast<Paint::Cap>(capHandle);
+        obj->setStrokeCap(cap);
+    }
+
+    static jint getStrokeJoin(CRITICAL_JNI_PARAMS_COMMA jlong objHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        return static_cast<jint>(obj->getStrokeJoin());
+    }
+
+    static void setStrokeJoin(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jint joinHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        Paint::Join join = (Paint::Join) joinHandle;
+        obj->setStrokeJoin(join);
+    }
+
+    static jboolean getFillPath(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jlong srcHandle, jlong dstHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        SkPath* src = reinterpret_cast<SkPath*>(srcHandle);
+        SkPath* dst = reinterpret_cast<SkPath*>(dstHandle);
+        return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE;
+    }
+
+    static jlong setShader(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jlong shaderHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle);
+        obj->setShader(sk_ref_sp(shader));
+        return reinterpret_cast<jlong>(obj->getShader());
+    }
+
+    static jlong setColorFilter(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jlong filterHandle) {
+        Paint* obj = reinterpret_cast<Paint *>(objHandle);
+        SkColorFilter* filter  = reinterpret_cast<SkColorFilter *>(filterHandle);
+        obj->setColorFilter(sk_ref_sp(filter));
+        return reinterpret_cast<jlong>(obj->getColorFilter());
+    }
+
+    static void setXfermode(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint xfermodeHandle) {
+        // validate that the Java enum values match our expectations
+        static_assert(0 == static_cast<int>(SkBlendMode::kClear), "xfermode_mismatch");
+        static_assert(1 == static_cast<int>(SkBlendMode::kSrc), "xfermode_mismatch");
+        static_assert(2 == static_cast<int>(SkBlendMode::kDst), "xfermode_mismatch");
+        static_assert(3 == static_cast<int>(SkBlendMode::kSrcOver), "xfermode_mismatch");
+        static_assert(4 == static_cast<int>(SkBlendMode::kDstOver), "xfermode_mismatch");
+        static_assert(5 == static_cast<int>(SkBlendMode::kSrcIn), "xfermode_mismatch");
+        static_assert(6 == static_cast<int>(SkBlendMode::kDstIn), "xfermode_mismatch");
+        static_assert(7 == static_cast<int>(SkBlendMode::kSrcOut), "xfermode_mismatch");
+        static_assert(8 == static_cast<int>(SkBlendMode::kDstOut), "xfermode_mismatch");
+        static_assert(9 == static_cast<int>(SkBlendMode::kSrcATop), "xfermode_mismatch");
+        static_assert(10 == static_cast<int>(SkBlendMode::kDstATop), "xfermode_mismatch");
+        static_assert(11 == static_cast<int>(SkBlendMode::kXor), "xfermode_mismatch");
+        static_assert(12 == static_cast<int>(SkBlendMode::kPlus), "xfermode_mismatch");
+        static_assert(13 == static_cast<int>(SkBlendMode::kModulate), "xfermode_mismatch");
+        static_assert(14 == static_cast<int>(SkBlendMode::kScreen), "xfermode_mismatch");
+        static_assert(15 == static_cast<int>(SkBlendMode::kOverlay), "xfermode_mismatch");
+        static_assert(16 == static_cast<int>(SkBlendMode::kDarken), "xfermode_mismatch");
+        static_assert(17 == static_cast<int>(SkBlendMode::kLighten), "xfermode_mismatch");
+        static_assert(18 == static_cast<int>(SkBlendMode::kColorDodge), "xfermode mismatch");
+        static_assert(19 == static_cast<int>(SkBlendMode::kColorBurn), "xfermode mismatch");
+        static_assert(20 == static_cast<int>(SkBlendMode::kHardLight), "xfermode mismatch");
+        static_assert(21 == static_cast<int>(SkBlendMode::kSoftLight), "xfermode mismatch");
+        static_assert(22 == static_cast<int>(SkBlendMode::kDifference), "xfermode mismatch");
+        static_assert(23 == static_cast<int>(SkBlendMode::kExclusion), "xfermode mismatch");
+        static_assert(24 == static_cast<int>(SkBlendMode::kMultiply), "xfermode mismatch");
+        static_assert(25 == static_cast<int>(SkBlendMode::kHue), "xfermode mismatch");
+        static_assert(26 == static_cast<int>(SkBlendMode::kSaturation), "xfermode mismatch");
+        static_assert(27 == static_cast<int>(SkBlendMode::kColor), "xfermode mismatch");
+        static_assert(28 == static_cast<int>(SkBlendMode::kLuminosity), "xfermode mismatch");
+
+        SkBlendMode mode = static_cast<SkBlendMode>(xfermodeHandle);
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        paint->setBlendMode(mode);
+    }
+
+    static jlong setPathEffect(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jlong effectHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        SkPathEffect* effect  = reinterpret_cast<SkPathEffect*>(effectHandle);
+        obj->setPathEffect(sk_ref_sp(effect));
+        return reinterpret_cast<jlong>(obj->getPathEffect());
+    }
+
+    static jlong setMaskFilter(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jlong maskfilterHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        SkMaskFilter* maskfilter  = reinterpret_cast<SkMaskFilter*>(maskfilterHandle);
+        obj->setMaskFilter(sk_ref_sp(maskfilter));
+        return reinterpret_cast<jlong>(obj->getMaskFilter());
+    }
+
+    static void setTypeface(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jlong typefaceHandle) {
+        Paint* paint = reinterpret_cast<Paint*>(objHandle);
+        paint->setAndroidTypeface(reinterpret_cast<Typeface*>(typefaceHandle));
+    }
+
+    static jint getTextAlign(CRITICAL_JNI_PARAMS_COMMA jlong objHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        return static_cast<jint>(obj->getTextAlign());
+    }
+
+    static void setTextAlign(CRITICAL_JNI_PARAMS_COMMA jlong objHandle, jint alignHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        Paint::Align align = static_cast<Paint::Align>(alignHandle);
+        obj->setTextAlign(align);
+    }
+
+    static void setTextLocalesByMinikinLocaleListId(CRITICAL_JNI_PARAMS_COMMA jlong objHandle,
+            jint minikinLocaleListId) {
+        Paint* obj = reinterpret_cast<Paint*>(objHandle);
+        obj->setMinikinLocaleListId(minikinLocaleListId);
+    }
+
+    static jboolean isElegantTextHeight(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        Paint* obj = reinterpret_cast<Paint*>(paintHandle);
+        return obj->getFamilyVariant() == minikin::FamilyVariant::ELEGANT;
+    }
+
+    static void setElegantTextHeight(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jboolean aa) {
+        Paint* obj = reinterpret_cast<Paint*>(paintHandle);
+        obj->setFamilyVariant(
+                aa ? minikin::FamilyVariant::ELEGANT : minikin::FamilyVariant::DEFAULT);
+    }
+
+    static jfloat getTextSize(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getSkFont().getSize());
+    }
+
+    static void setTextSize(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat textSize) {
+        if (textSize >= 0) {
+            reinterpret_cast<Paint*>(paintHandle)->getSkFont().setSize(textSize);
+        }
+    }
+
+    static jfloat getTextScaleX(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getSkFont().getScaleX());
+    }
+
+    static void setTextScaleX(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat scaleX) {
+        reinterpret_cast<Paint*>(paintHandle)->getSkFont().setScaleX(scaleX);
+    }
+
+    static jfloat getTextSkewX(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        return SkScalarToFloat(reinterpret_cast<Paint*>(paintHandle)->getSkFont().getSkewX());
+    }
+
+    static void setTextSkewX(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat skewX) {
+        reinterpret_cast<Paint*>(paintHandle)->getSkFont().setSkewX(skewX);
+    }
+
+    static jfloat getLetterSpacing(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        return paint->getLetterSpacing();
+    }
+
+    static void setLetterSpacing(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat letterSpacing) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        paint->setLetterSpacing(letterSpacing);
+    }
+
+    static jfloat getWordSpacing(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        return paint->getWordSpacing();
+    }
+
+    static void setWordSpacing(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat wordSpacing) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        paint->setWordSpacing(wordSpacing);
+    }
+
+    static jint getStartHyphenEdit(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint hyphen) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        return static_cast<jint>(paint->getStartHyphenEdit());
+    }
+
+    static jint getEndHyphenEdit(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint hyphen) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        return static_cast<jint>(paint->getEndHyphenEdit());
+    }
+
+    static void setStartHyphenEdit(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint hyphen) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        paint->setStartHyphenEdit((uint32_t)hyphen);
+    }
+
+    static void setEndHyphenEdit(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jint hyphen) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        paint->setEndHyphenEdit((uint32_t)hyphen);
+    }
+
+    static jfloat ascent(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        SkFontMetrics metrics;
+        getMetricsInternal(paintHandle, &metrics);
+        return SkScalarToFloat(metrics.fAscent);
+    }
+
+    static jfloat descent(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        SkFontMetrics metrics;
+        getMetricsInternal(paintHandle, &metrics);
+        return SkScalarToFloat(metrics.fDescent);
+    }
+
+    static jfloat getUnderlinePosition(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        SkFontMetrics metrics;
+        getMetricsInternal(paintHandle, &metrics);
+        SkScalar position;
+        if (metrics.hasUnderlinePosition(&position)) {
+            return SkScalarToFloat(position);
+        } else {
+            const SkScalar textSize = reinterpret_cast<Paint*>(paintHandle)->getSkFont().getSize();
+            return SkScalarToFloat(Paint::kStdUnderline_Top * textSize);
+        }
+    }
+
+    static jfloat getUnderlineThickness(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        SkFontMetrics metrics;
+        getMetricsInternal(paintHandle, &metrics);
+        SkScalar thickness;
+        if (metrics.hasUnderlineThickness(&thickness)) {
+            return SkScalarToFloat(thickness);
+        } else {
+            const SkScalar textSize = reinterpret_cast<Paint*>(paintHandle)->getSkFont().getSize();
+            return SkScalarToFloat(Paint::kStdUnderline_Thickness * textSize);
+        }
+    }
+
+    static jfloat getStrikeThruPosition(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        const SkScalar textSize = reinterpret_cast<Paint*>(paintHandle)->getSkFont().getSize();
+        return SkScalarToFloat(Paint::kStdStrikeThru_Top * textSize);
+    }
+
+    static jfloat getStrikeThruThickness(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        const SkScalar textSize = reinterpret_cast<Paint*>(paintHandle)->getSkFont().getSize();
+        return SkScalarToFloat(Paint::kStdStrikeThru_Thickness * textSize);
+    }
+
+    static void setShadowLayer(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle, jfloat radius,
+                               jfloat dx, jfloat dy, jlong colorSpaceHandle,
+                               jlong colorLong) {
+        SkColor4f color = GraphicsJNI::convertColorLong(colorLong);
+        sk_sp<SkColorSpace> cs = GraphicsJNI::getNativeColorSpace(colorSpaceHandle);
+
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        if (radius <= 0) {
+            paint->setLooper(nullptr);
+        }
+        else {
+            SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius);
+            paint->setLooper(SkBlurDrawLooper::Make(color, cs.get(), sigma, dx, dy));
+        }
+    }
+
+    static jboolean hasShadowLayer(CRITICAL_JNI_PARAMS_COMMA jlong paintHandle) {
+        Paint* paint = reinterpret_cast<Paint*>(paintHandle);
+        return paint->getLooper() && paint->getLooper()->asABlurShadow(nullptr);
+    }
+
+    static jboolean equalsForTextMeasurement(CRITICAL_JNI_PARAMS_COMMA jlong lPaint, jlong rPaint) {
+        if (lPaint == rPaint) {
+            return true;
+        }
+        Paint* leftPaint = reinterpret_cast<Paint*>(lPaint);
+        Paint* rightPaint = reinterpret_cast<Paint*>(rPaint);
+
+        const Typeface* leftTypeface = Typeface::resolveDefault(leftPaint->getAndroidTypeface());
+        const Typeface* rightTypeface = Typeface::resolveDefault(rightPaint->getAndroidTypeface());
+        minikin::MinikinPaint leftMinikinPaint
+                = MinikinUtils::prepareMinikinPaint(leftPaint, leftTypeface);
+        minikin::MinikinPaint rightMinikinPaint
+                = MinikinUtils::prepareMinikinPaint(rightPaint, rightTypeface);
+
+        return leftMinikinPaint == rightMinikinPaint;
+    }
+
+}; // namespace PaintGlue
+
+static const JNINativeMethod methods[] = {
+    {"nGetNativeFinalizer", "()J", (void*) PaintGlue::getNativeFinalizer},
+    {"nInit","()J", (void*) PaintGlue::init},
+    {"nInitWithPaint","(J)J", (void*) PaintGlue::initWithPaint},
+    {"nBreakText","(J[CIIFI[F)I", (void*) PaintGlue::breakTextC},
+    {"nBreakText","(JLjava/lang/String;ZFI[F)I", (void*) PaintGlue::breakTextS},
+    {"nGetTextAdvances","(J[CIIIII[FI)F",
+            (void*) PaintGlue::getTextAdvances___CIIIII_FI},
+    {"nGetTextAdvances","(JLjava/lang/String;IIIII[FI)F",
+            (void*) PaintGlue::getTextAdvances__StringIIIII_FI},
+
+    {"nGetTextRunCursor", "(J[CIIIII)I", (void*) PaintGlue::getTextRunCursor___C},
+    {"nGetTextRunCursor", "(JLjava/lang/String;IIIII)I",
+            (void*) PaintGlue::getTextRunCursor__String},
+    {"nGetTextPath", "(JI[CIIFFJ)V", (void*) PaintGlue::getTextPath___C},
+    {"nGetTextPath", "(JILjava/lang/String;IIFFJ)V", (void*) PaintGlue::getTextPath__String},
+    {"nGetStringBounds", "(JLjava/lang/String;IIILandroid/graphics/Rect;)V",
+            (void*) PaintGlue::getStringBounds },
+    {"nGetCharArrayBounds", "(J[CIIILandroid/graphics/Rect;)V",
+            (void*) PaintGlue::getCharArrayBounds },
+    {"nHasGlyph", "(JILjava/lang/String;)Z", (void*) PaintGlue::hasGlyph },
+    {"nGetRunAdvance", "(J[CIIIIZI)F", (void*) PaintGlue::getRunAdvance___CIIIIZI_F},
+    {"nGetOffsetForAdvance", "(J[CIIIIZF)I",
+            (void*) PaintGlue::getOffsetForAdvance___CIIIIZF_I},
+
+    // --------------- @FastNative ----------------------
+
+    {"nSetTextLocales","(JLjava/lang/String;)I", (void*) PaintGlue::setTextLocales},
+    {"nSetFontFeatureSettings","(JLjava/lang/String;)V",
+                (void*) PaintGlue::setFontFeatureSettings},
+    {"nGetFontMetrics", "(JLandroid/graphics/Paint$FontMetrics;)F",
+                (void*)PaintGlue::getFontMetrics},
+    {"nGetFontMetricsInt", "(JLandroid/graphics/Paint$FontMetricsInt;)I",
+            (void*)PaintGlue::getFontMetricsInt},
+
+    // --------------- @CriticalNative ------------------
+
+    {"nReset","(J)V", (void*) PaintGlue::reset},
+    {"nSet","(JJ)V", (void*) PaintGlue::assign},
+    {"nGetFlags","(J)I", (void*) PaintGlue::getFlags},
+    {"nSetFlags","(JI)V", (void*) PaintGlue::setFlags},
+    {"nGetHinting","(J)I", (void*) PaintGlue::getHinting},
+    {"nSetHinting","(JI)V", (void*) PaintGlue::setHinting},
+    {"nSetAntiAlias","(JZ)V", (void*) PaintGlue::setAntiAlias},
+    {"nSetSubpixelText","(JZ)V", (void*) PaintGlue::setSubpixelText},
+    {"nSetLinearText","(JZ)V", (void*) PaintGlue::setLinearText},
+    {"nSetUnderlineText","(JZ)V", (void*) PaintGlue::setUnderlineText},
+    {"nSetStrikeThruText","(JZ)V", (void*) PaintGlue::setStrikeThruText},
+    {"nSetFakeBoldText","(JZ)V", (void*) PaintGlue::setFakeBoldText},
+    {"nSetFilterBitmap","(JZ)V", (void*) PaintGlue::setFilterBitmap},
+    {"nSetDither","(JZ)V", (void*) PaintGlue::setDither},
+    {"nGetStyle","(J)I", (void*) PaintGlue::getStyle},
+    {"nSetStyle","(JI)V", (void*) PaintGlue::setStyle},
+    {"nSetColor","(JI)V", (void*) PaintGlue::setColor},
+    {"nSetColor","(JJJ)V", (void*) PaintGlue::setColorLong},
+    {"nSetAlpha","(JI)V", (void*) PaintGlue::setAlpha},
+    {"nGetStrokeWidth","(J)F", (void*) PaintGlue::getStrokeWidth},
+    {"nSetStrokeWidth","(JF)V", (void*) PaintGlue::setStrokeWidth},
+    {"nGetStrokeMiter","(J)F", (void*) PaintGlue::getStrokeMiter},
+    {"nSetStrokeMiter","(JF)V", (void*) PaintGlue::setStrokeMiter},
+    {"nGetStrokeCap","(J)I", (void*) PaintGlue::getStrokeCap},
+    {"nSetStrokeCap","(JI)V", (void*) PaintGlue::setStrokeCap},
+    {"nGetStrokeJoin","(J)I", (void*) PaintGlue::getStrokeJoin},
+    {"nSetStrokeJoin","(JI)V", (void*) PaintGlue::setStrokeJoin},
+    {"nGetFillPath","(JJJ)Z", (void*) PaintGlue::getFillPath},
+    {"nSetShader","(JJ)J", (void*) PaintGlue::setShader},
+    {"nSetColorFilter","(JJ)J", (void*) PaintGlue::setColorFilter},
+    {"nSetXfermode","(JI)V", (void*) PaintGlue::setXfermode},
+    {"nSetPathEffect","(JJ)J", (void*) PaintGlue::setPathEffect},
+    {"nSetMaskFilter","(JJ)J", (void*) PaintGlue::setMaskFilter},
+    {"nSetTypeface","(JJ)V", (void*) PaintGlue::setTypeface},
+    {"nGetTextAlign","(J)I", (void*) PaintGlue::getTextAlign},
+    {"nSetTextAlign","(JI)V", (void*) PaintGlue::setTextAlign},
+    {"nSetTextLocalesByMinikinLocaleListId","(JI)V",
+            (void*) PaintGlue::setTextLocalesByMinikinLocaleListId},
+    {"nIsElegantTextHeight","(J)Z", (void*) PaintGlue::isElegantTextHeight},
+    {"nSetElegantTextHeight","(JZ)V", (void*) PaintGlue::setElegantTextHeight},
+    {"nGetTextSize","(J)F", (void*) PaintGlue::getTextSize},
+    {"nSetTextSize","(JF)V", (void*) PaintGlue::setTextSize},
+    {"nGetTextScaleX","(J)F", (void*) PaintGlue::getTextScaleX},
+    {"nSetTextScaleX","(JF)V", (void*) PaintGlue::setTextScaleX},
+    {"nGetTextSkewX","(J)F", (void*) PaintGlue::getTextSkewX},
+    {"nSetTextSkewX","(JF)V", (void*) PaintGlue::setTextSkewX},
+    {"nGetLetterSpacing","(J)F", (void*) PaintGlue::getLetterSpacing},
+    {"nSetLetterSpacing","(JF)V", (void*) PaintGlue::setLetterSpacing},
+    {"nGetWordSpacing","(J)F", (void*) PaintGlue::getWordSpacing},
+    {"nSetWordSpacing","(JF)V", (void*) PaintGlue::setWordSpacing},
+    {"nGetStartHyphenEdit", "(J)I", (void*) PaintGlue::getStartHyphenEdit},
+    {"nGetEndHyphenEdit", "(J)I", (void*) PaintGlue::getEndHyphenEdit},
+    {"nSetStartHyphenEdit", "(JI)V", (void*) PaintGlue::setStartHyphenEdit},
+    {"nSetEndHyphenEdit", "(JI)V", (void*) PaintGlue::setEndHyphenEdit},
+    {"nAscent","(J)F", (void*) PaintGlue::ascent},
+    {"nDescent","(J)F", (void*) PaintGlue::descent},
+    {"nGetUnderlinePosition","(J)F", (void*) PaintGlue::getUnderlinePosition},
+    {"nGetUnderlineThickness","(J)F", (void*) PaintGlue::getUnderlineThickness},
+    {"nGetStrikeThruPosition","(J)F", (void*) PaintGlue::getStrikeThruPosition},
+    {"nGetStrikeThruThickness","(J)F", (void*) PaintGlue::getStrikeThruThickness},
+    {"nSetShadowLayer", "(JFFFJJ)V", (void*)PaintGlue::setShadowLayer},
+    {"nHasShadowLayer", "(J)Z", (void*)PaintGlue::hasShadowLayer},
+    {"nEqualsForTextMeasurement", "(JJ)Z", (void*)PaintGlue::equalsForTextMeasurement},
+};
+
+int register_android_graphics_Paint(JNIEnv* env) {
+    gFontMetrics_class = FindClassOrDie(env, "android/graphics/Paint$FontMetrics");
+    gFontMetrics_class = MakeGlobalRefOrDie(env, gFontMetrics_class);
+
+    gFontMetrics_fieldID.top = GetFieldIDOrDie(env, gFontMetrics_class, "top", "F");
+    gFontMetrics_fieldID.ascent = GetFieldIDOrDie(env, gFontMetrics_class, "ascent", "F");
+    gFontMetrics_fieldID.descent = GetFieldIDOrDie(env, gFontMetrics_class, "descent", "F");
+    gFontMetrics_fieldID.bottom = GetFieldIDOrDie(env, gFontMetrics_class, "bottom", "F");
+    gFontMetrics_fieldID.leading = GetFieldIDOrDie(env, gFontMetrics_class, "leading", "F");
+
+    gFontMetricsInt_class = FindClassOrDie(env, "android/graphics/Paint$FontMetricsInt");
+    gFontMetricsInt_class = MakeGlobalRefOrDie(env, gFontMetricsInt_class);
+
+    gFontMetricsInt_fieldID.top = GetFieldIDOrDie(env, gFontMetricsInt_class, "top", "I");
+    gFontMetricsInt_fieldID.ascent = GetFieldIDOrDie(env, gFontMetricsInt_class, "ascent", "I");
+    gFontMetricsInt_fieldID.descent = GetFieldIDOrDie(env, gFontMetricsInt_class, "descent", "I");
+    gFontMetricsInt_fieldID.bottom = GetFieldIDOrDie(env, gFontMetricsInt_class, "bottom", "I");
+    gFontMetricsInt_fieldID.leading = GetFieldIDOrDie(env, gFontMetricsInt_class, "leading", "I");
+
+    return RegisterMethodsOrDie(env, "android/graphics/Paint", methods, NELEM(methods));
+}
+
+}