core/jni/android/graphics/FontFamily.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2014 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.
  */

 #define LOG_TAG "Minikin"

 #include "JNIHelp.h"
 #include <core_jni_helpers.h>

 #include "SkData.h"
 #include "SkFontMgr.h"
 #include "SkRefCnt.h"
 #include "SkTypeface.h"
 #include "GraphicsJNI.h"
 #include <ScopedPrimitiveArray.h>
 #include <ScopedUtfChars.h>
 #include <android_runtime/AndroidRuntime.h>
 #include <android_runtime/android_util_AssetManager.h>
 #include <androidfw/AssetManager.h>
 #include "Utils.h"

 #include <hwui/MinikinSkia.h>
 #include <hwui/Typeface.h>
 #include <minikin/FontFamily.h>

 #include <memory>

 namespace android {

 struct NativeFamilyBuilder {
     uint32_t langId;
     int variant;
     std::vector<minikin::Font> fonts;
 };

 static jlong FontFamily_initBuilder(JNIEnv* env, jobject clazz, jstring lang, jint variant) {
     NativeFamilyBuilder* builder = new NativeFamilyBuilder();
     if (lang != nullptr) {
         ScopedUtfChars str(env, lang);
         builder->langId = minikin::FontStyle::registerLanguageList(str.c_str());
     } else {
         builder->langId = minikin::FontStyle::registerLanguageList("");
     }
     builder->variant = variant;
     return reinterpret_cast<jlong>(builder);
 }

 static jlong FontFamily_create(jlong builderPtr) {
     if (builderPtr == 0) {
         return 0;
     }
     NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
     minikin::FontFamily* family = new minikin::FontFamily(
             builder->langId, builder->variant, std::move(builder->fonts));
     delete builder;
     return reinterpret_cast<jlong>(family);
 }

 static void FontFamily_abort(jlong builderPtr) {
     NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
     minikin::Font::clearElementsWithLock(&builder->fonts);
     delete builder;
 }

 static void FontFamily_unref(jlong familyPtr) {
     minikin::FontFamily* fontFamily = reinterpret_cast<minikin::FontFamily*>(familyPtr);
     fontFamily->Unref();
 }

 static void addSkTypeface(jlong builderPtr, sk_sp<SkTypeface> face, const void* fontData,
         size_t fontSize, int ttcIndex) {
     minikin::MinikinFont* minikinFont =
             new MinikinFontSkia(std::move(face), fontData, fontSize, ttcIndex);
     NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
     int weight;
     bool italic;
     if (!minikin::FontFamily::analyzeStyle(minikinFont, &weight, &italic)) {
         ALOGE("analyzeStyle failed. Using default style");
         weight = 400;
         italic = false;
     }
     builder->fonts.push_back(minikin::Font(minikinFont, minikin::FontStyle(weight / 100, italic)));
     minikinFont->Unref();
 }

 static void release_global_ref(const void* /*data*/, void* context) {
     JNIEnv* env = AndroidRuntime::getJNIEnv();
     bool needToAttach = (env == NULL);
     if (needToAttach) {
         JavaVMAttachArgs args;
         args.version = JNI_VERSION_1_4;
         args.name = "release_font_data";
         args.group = NULL;
         jint result = AndroidRuntime::getJavaVM()->AttachCurrentThread(&env, &args);
         if (result != JNI_OK) {
             ALOGE("failed to attach to thread to release global ref.");
             return;
         }
     }

     jobject obj = reinterpret_cast<jobject>(context);
     env->DeleteGlobalRef(obj);

     if (needToAttach) {
        AndroidRuntime::getJavaVM()->DetachCurrentThread();
     }
 }

 static jboolean FontFamily_addFont(JNIEnv* env, jobject clazz, jlong builderPtr, jobject bytebuf,
         jint ttcIndex) {
     NPE_CHECK_RETURN_ZERO(env, bytebuf);
     const void* fontPtr = env->GetDirectBufferAddress(bytebuf);
     if (fontPtr == NULL) {
         ALOGE("addFont failed to create font, buffer invalid");
         return false;
     }
     jlong fontSize = env->GetDirectBufferCapacity(bytebuf);
     if (fontSize < 0) {
         ALOGE("addFont failed to create font, buffer size invalid");
         return false;
     }
     jobject fontRef = MakeGlobalRefOrDie(env, bytebuf);
     sk_sp<SkData> data(SkData::MakeWithProc(fontPtr, fontSize,
             release_global_ref, reinterpret_cast<void*>(fontRef)));
     std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));

     SkFontMgr::FontParameters params;
     params.setCollectionIndex(ttcIndex);

     sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
     sk_sp<SkTypeface> face(fm->createFromStream(fontData.release(), params));
     if (face == NULL) {
         ALOGE("addFont failed to create font");
         return false;
     }
     addSkTypeface(builderPtr, std::move(face), fontPtr, (size_t)fontSize, ttcIndex);
     return true;
 }

 static struct {
     jmethodID mGet;
     jmethodID mSize;
 } gListClassInfo;

 static struct {
     jfieldID mTag;
     jfieldID mStyleValue;
 } gAxisClassInfo;

 static jboolean FontFamily_addFontWeightStyle(JNIEnv* env, jobject clazz, jlong builderPtr,
         jobject font, jint ttcIndex, jobject listOfAxis, jint weight, jboolean isItalic) {
     NPE_CHECK_RETURN_ZERO(env, font);

     // Declare axis native type.
     std::unique_ptr<SkFontMgr::FontParameters::Axis[]> skiaAxes;
     int skiaAxesLength = 0;
     if (listOfAxis) {
         jint listSize = env->CallIntMethod(listOfAxis, gListClassInfo.mSize);

         skiaAxes.reset(new SkFontMgr::FontParameters::Axis[listSize]);
         skiaAxesLength = listSize;
         for (jint i = 0; i < listSize; ++i) {
             jobject axisObject = env->CallObjectMethod(listOfAxis, gListClassInfo.mGet, i);
             if (!axisObject) {
                 skiaAxes[i].fTag = 0;
                 skiaAxes[i].fStyleValue = 0;
                 continue;
             }

             jint tag = env->GetIntField(axisObject, gAxisClassInfo.mTag);
             jfloat stylevalue = env->GetFloatField(axisObject, gAxisClassInfo.mStyleValue);
             skiaAxes[i].fTag = tag;
             skiaAxes[i].fStyleValue = SkFloatToScalar(stylevalue);
         }
     }

     const void* fontPtr = env->GetDirectBufferAddress(font);
     if (fontPtr == NULL) {
         ALOGE("addFont failed to create font, buffer invalid");
         return false;
     }
     jlong fontSize = env->GetDirectBufferCapacity(font);
     if (fontSize < 0) {
         ALOGE("addFont failed to create font, buffer size invalid");
         return false;
     }
     jobject fontRef = MakeGlobalRefOrDie(env, font);
     sk_sp<SkData> data(SkData::MakeWithProc(fontPtr, fontSize,
             release_global_ref, reinterpret_cast<void*>(fontRef)));
     std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));

     SkFontMgr::FontParameters params;
     params.setCollectionIndex(ttcIndex);
     params.setAxes(skiaAxes.get(), skiaAxesLength);

     sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
     sk_sp<SkTypeface> face(fm->createFromStream(fontData.release(), params));
     if (face == NULL) {
         ALOGE("addFont failed to create font, invalid request");
         return false;
     }
     minikin::MinikinFont* minikinFont =
             new MinikinFontSkia(std::move(face), fontPtr, fontSize, ttcIndex);
     NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
     builder->fonts.push_back(minikin::Font(minikinFont,
             minikin::FontStyle(weight / 100, isItalic)));
     minikinFont->Unref();
     return true;
 }

 static void releaseAsset(const void* ptr, void* context) {
     delete static_cast<Asset*>(context);
 }

 static jboolean FontFamily_addFontFromAssetManager(JNIEnv* env, jobject, jlong builderPtr,
         jobject jassetMgr, jstring jpath, jint cookie, jboolean isAsset) {
     NPE_CHECK_RETURN_ZERO(env, jassetMgr);
     NPE_CHECK_RETURN_ZERO(env, jpath);

     AssetManager* mgr = assetManagerForJavaObject(env, jassetMgr);
     if (NULL == mgr) {
         return false;
     }

     ScopedUtfChars str(env, jpath);
     if (str.c_str() == nullptr) {
         return false;
     }

     Asset* asset;
     if (isAsset) {
         asset = mgr->open(str.c_str(), Asset::ACCESS_BUFFER);
     } else {
         asset = cookie ? mgr->openNonAsset(static_cast<int32_t>(cookie), str.c_str(),
                 Asset::ACCESS_BUFFER) : mgr->openNonAsset(str.c_str(), Asset::ACCESS_BUFFER);
     }

     if (NULL == asset) {
         return false;
     }

     const void* buf = asset->getBuffer(false);
     if (NULL == buf) {
         delete asset;
         return false;
     }

     size_t bufSize = asset->getLength();
     sk_sp<SkData> data(SkData::MakeWithProc(buf, asset->getLength(), releaseAsset, asset));
     std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));

     sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
     sk_sp<SkTypeface> face(fm->createFromStream(fontData.release(), SkFontMgr::FontParameters()));
     if (face == NULL) {
         ALOGE("addFontFromAsset failed to create font %s", str.c_str());
         return false;
     }

     addSkTypeface(builderPtr, std::move(face), buf, bufSize, 0 /* ttc index */);
     return true;
 }

 ///////////////////////////////////////////////////////////////////////////////

 static const JNINativeMethod gFontFamilyMethods[] = {
     { "nInitBuilder",          "(Ljava/lang/String;I)J", (void*)FontFamily_initBuilder },
     { "nCreateFamily",         "(J)J", (void*)FontFamily_create },
     { "nAbort",                "(J)V", (void*)FontFamily_abort },
     { "nUnrefFamily",          "(J)V", (void*)FontFamily_unref },
     { "nAddFont",              "(JLjava/nio/ByteBuffer;I)Z", (void*)FontFamily_addFont },
     { "nAddFontWeightStyle",   "(JLjava/nio/ByteBuffer;ILjava/util/List;IZ)Z",
             (void*)FontFamily_addFontWeightStyle },
     { "nAddFontFromAssetManager",     "(JLandroid/content/res/AssetManager;Ljava/lang/String;IZ)Z",
             (void*)FontFamily_addFontFromAssetManager },
 };

 int register_android_graphics_FontFamily(JNIEnv* env)
 {
     int err = RegisterMethodsOrDie(env, "android/graphics/FontFamily", gFontFamilyMethods,
             NELEM(gFontFamilyMethods));

     jclass listClass = FindClassOrDie(env, "java/util/List");
     gListClassInfo.mGet = GetMethodIDOrDie(env, listClass, "get", "(I)Ljava/lang/Object;");
     gListClassInfo.mSize = GetMethodIDOrDie(env, listClass, "size", "()I");

     jclass axisClass = FindClassOrDie(env, "android/text/FontConfig$Axis");
     gAxisClassInfo.mTag = GetFieldIDOrDie(env, axisClass, "mTag", "I");
     gAxisClassInfo.mStyleValue = GetFieldIDOrDie(env, axisClass, "mStyleValue", "F");

     return err;
 }

 }
	/*
	* Copyright (C) 2014 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.
	*/

	#define LOG_TAG "Minikin"

	#include "JNIHelp.h"
	#include <core_jni_helpers.h>

	#include "SkData.h"
	#include "SkFontMgr.h"
	#include "SkRefCnt.h"
	#include "SkTypeface.h"
	#include "GraphicsJNI.h"
	#include <ScopedPrimitiveArray.h>
	#include <ScopedUtfChars.h>
	#include <android_runtime/AndroidRuntime.h>
	#include <android_runtime/android_util_AssetManager.h>
	#include <androidfw/AssetManager.h>
	#include "Utils.h"

	#include <hwui/MinikinSkia.h>
	#include <hwui/Typeface.h>
	#include <minikin/FontFamily.h>

	#include <memory>

	namespace android {

	struct NativeFamilyBuilder {
	uint32_t langId;
	int variant;
	std::vector<minikin::Font> fonts;
	};

	static jlong FontFamily_initBuilder(JNIEnv* env, jobject clazz, jstring lang, jint variant) {
	NativeFamilyBuilder* builder = new NativeFamilyBuilder();
	if (lang != nullptr) {
	ScopedUtfChars str(env, lang);
	builder->langId = minikin::FontStyle::registerLanguageList(str.c_str());
	} else {
	builder->langId = minikin::FontStyle::registerLanguageList("");
	}
	builder->variant = variant;
	return reinterpret_cast<jlong>(builder);
	}

	static jlong FontFamily_create(jlong builderPtr) {
	if (builderPtr == 0) {
	return 0;
	}
	NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
	minikin::FontFamily* family = new minikin::FontFamily(
	builder->langId, builder->variant, std::move(builder->fonts));
	delete builder;
	return reinterpret_cast<jlong>(family);
	}

	static void FontFamily_abort(jlong builderPtr) {
	NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
	minikin::Font::clearElementsWithLock(&builder->fonts);
	delete builder;
	}

	static void FontFamily_unref(jlong familyPtr) {
	minikin::FontFamily* fontFamily = reinterpret_cast<minikin::FontFamily*>(familyPtr);
	fontFamily->Unref();
	}

	static void addSkTypeface(jlong builderPtr, sk_sp<SkTypeface> face, const void* fontData,
	size_t fontSize, int ttcIndex) {
	minikin::MinikinFont* minikinFont =
	new MinikinFontSkia(std::move(face), fontData, fontSize, ttcIndex);
	NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
	int weight;
	bool italic;
	if (!minikin::FontFamily::analyzeStyle(minikinFont, &weight, &italic)) {
	ALOGE("analyzeStyle failed. Using default style");
	weight = 400;
	italic = false;
	}
	builder->fonts.push_back(minikin::Font(minikinFont, minikin::FontStyle(weight / 100, italic)));
	minikinFont->Unref();
	}

	static void release_global_ref(const void* /data/, void* context) {
	JNIEnv* env = AndroidRuntime::getJNIEnv();
	bool needToAttach = (env == NULL);
	if (needToAttach) {
	JavaVMAttachArgs args;
	args.version = JNI_VERSION_1_4;
	args.name = "release_font_data";
	args.group = NULL;
	jint result = AndroidRuntime::getJavaVM()->AttachCurrentThread(&env, &args);
	if (result != JNI_OK) {
	ALOGE("failed to attach to thread to release global ref.");
	return;
	}
	}

	jobject obj = reinterpret_cast<jobject>(context);
	env->DeleteGlobalRef(obj);

	if (needToAttach) {
	AndroidRuntime::getJavaVM()->DetachCurrentThread();
	}
	}

	static jboolean FontFamily_addFont(JNIEnv* env, jobject clazz, jlong builderPtr, jobject bytebuf,
	jint ttcIndex) {
	NPE_CHECK_RETURN_ZERO(env, bytebuf);
	const void* fontPtr = env->GetDirectBufferAddress(bytebuf);
	if (fontPtr == NULL) {
	ALOGE("addFont failed to create font, buffer invalid");
	return false;
	}
	jlong fontSize = env->GetDirectBufferCapacity(bytebuf);
	if (fontSize < 0) {
	ALOGE("addFont failed to create font, buffer size invalid");
	return false;
	}
	jobject fontRef = MakeGlobalRefOrDie(env, bytebuf);
	sk_sp<SkData> data(SkData::MakeWithProc(fontPtr, fontSize,
	release_global_ref, reinterpret_cast<void*>(fontRef)));
	std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));

	SkFontMgr::FontParameters params;
	params.setCollectionIndex(ttcIndex);

	sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
	sk_sp<SkTypeface> face(fm->createFromStream(fontData.release(), params));
	if (face == NULL) {
	ALOGE("addFont failed to create font");
	return false;
	}
	addSkTypeface(builderPtr, std::move(face), fontPtr, (size_t)fontSize, ttcIndex);
	return true;
	}

	static struct {
	jmethodID mGet;
	jmethodID mSize;
	} gListClassInfo;

	static struct {
	jfieldID mTag;
	jfieldID mStyleValue;
	} gAxisClassInfo;

	static jboolean FontFamily_addFontWeightStyle(JNIEnv* env, jobject clazz, jlong builderPtr,
	jobject font, jint ttcIndex, jobject listOfAxis, jint weight, jboolean isItalic) {
	NPE_CHECK_RETURN_ZERO(env, font);

	// Declare axis native type.
	std::unique_ptr<SkFontMgr::FontParameters::Axis[]> skiaAxes;
	int skiaAxesLength = 0;
	if (listOfAxis) {
	jint listSize = env->CallIntMethod(listOfAxis, gListClassInfo.mSize);

	skiaAxes.reset(new SkFontMgr::FontParameters::Axis[listSize]);
	skiaAxesLength = listSize;
	for (jint i = 0; i < listSize; ++i) {
	jobject axisObject = env->CallObjectMethod(listOfAxis, gListClassInfo.mGet, i);
	if (!axisObject) {
	skiaAxes[i].fTag = 0;
	skiaAxes[i].fStyleValue = 0;
	continue;
	}

	jint tag = env->GetIntField(axisObject, gAxisClassInfo.mTag);
	jfloat stylevalue = env->GetFloatField(axisObject, gAxisClassInfo.mStyleValue);
	skiaAxes[i].fTag = tag;
	skiaAxes[i].fStyleValue = SkFloatToScalar(stylevalue);
	}
	}

	const void* fontPtr = env->GetDirectBufferAddress(font);
	if (fontPtr == NULL) {
	ALOGE("addFont failed to create font, buffer invalid");
	return false;
	}
	jlong fontSize = env->GetDirectBufferCapacity(font);
	if (fontSize < 0) {
	ALOGE("addFont failed to create font, buffer size invalid");
	return false;
	}
	jobject fontRef = MakeGlobalRefOrDie(env, font);
	sk_sp<SkData> data(SkData::MakeWithProc(fontPtr, fontSize,
	release_global_ref, reinterpret_cast<void*>(fontRef)));
	std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));

	SkFontMgr::FontParameters params;
	params.setCollectionIndex(ttcIndex);
	params.setAxes(skiaAxes.get(), skiaAxesLength);

	sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
	sk_sp<SkTypeface> face(fm->createFromStream(fontData.release(), params));
	if (face == NULL) {
	ALOGE("addFont failed to create font, invalid request");
	return false;
	}
	minikin::MinikinFont* minikinFont =
	new MinikinFontSkia(std::move(face), fontPtr, fontSize, ttcIndex);
	NativeFamilyBuilder* builder = reinterpret_cast<NativeFamilyBuilder*>(builderPtr);
	builder->fonts.push_back(minikin::Font(minikinFont,
	minikin::FontStyle(weight / 100, isItalic)));
	minikinFont->Unref();
	return true;
	}

	static void releaseAsset(const void* ptr, void* context) {
	delete static_cast<Asset*>(context);
	}

	static jboolean FontFamily_addFontFromAssetManager(JNIEnv* env, jobject, jlong builderPtr,
	jobject jassetMgr, jstring jpath, jint cookie, jboolean isAsset) {
	NPE_CHECK_RETURN_ZERO(env, jassetMgr);
	NPE_CHECK_RETURN_ZERO(env, jpath);

	AssetManager* mgr = assetManagerForJavaObject(env, jassetMgr);
	if (NULL == mgr) {
	return false;
	}

	ScopedUtfChars str(env, jpath);
	if (str.c_str() == nullptr) {
	return false;
	}

	Asset* asset;
	if (isAsset) {
	asset = mgr->open(str.c_str(), Asset::ACCESS_BUFFER);
	} else {
	asset = cookie ? mgr->openNonAsset(static_cast<int32_t>(cookie), str.c_str(),
	Asset::ACCESS_BUFFER) : mgr->openNonAsset(str.c_str(), Asset::ACCESS_BUFFER);
	}

	if (NULL == asset) {
	return false;
	}

	const void* buf = asset->getBuffer(false);
	if (NULL == buf) {
	delete asset;
	return false;
	}

	size_t bufSize = asset->getLength();
	sk_sp<SkData> data(SkData::MakeWithProc(buf, asset->getLength(), releaseAsset, asset));
	std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));

	sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
	sk_sp<SkTypeface> face(fm->createFromStream(fontData.release(), SkFontMgr::FontParameters()));
	if (face == NULL) {
	ALOGE("addFontFromAsset failed to create font %s", str.c_str());
	return false;
	}

	addSkTypeface(builderPtr, std::move(face), buf, bufSize, 0 /* ttc index */);
	return true;
	}

	///////////////////////////////////////////////////////////////////////////////

	static const JNINativeMethod gFontFamilyMethods[] = {
	{ "nInitBuilder", "(Ljava/lang/String;I)J", (void*)FontFamily_initBuilder },
	{ "nCreateFamily", "(J)J", (void*)FontFamily_create },
	{ "nAbort", "(J)V", (void*)FontFamily_abort },
	{ "nUnrefFamily", "(J)V", (void*)FontFamily_unref },
	{ "nAddFont", "(JLjava/nio/ByteBuffer;I)Z", (void*)FontFamily_addFont },
	{ "nAddFontWeightStyle", "(JLjava/nio/ByteBuffer;ILjava/util/List;IZ)Z",
	(void*)FontFamily_addFontWeightStyle },
	{ "nAddFontFromAssetManager", "(JLandroid/content/res/AssetManager;Ljava/lang/String;IZ)Z",
	(void*)FontFamily_addFontFromAssetManager },
	};

	int register_android_graphics_FontFamily(JNIEnv* env)
	{
	int err = RegisterMethodsOrDie(env, "android/graphics/FontFamily", gFontFamilyMethods,
	NELEM(gFontFamilyMethods));

	jclass listClass = FindClassOrDie(env, "java/util/List");
	gListClassInfo.mGet = GetMethodIDOrDie(env, listClass, "get", "(I)Ljava/lang/Object;");
	gListClassInfo.mSize = GetMethodIDOrDie(env, listClass, "size", "()I");

	jclass axisClass = FindClassOrDie(env, "android/text/FontConfig$Axis");
	gAxisClassInfo.mTag = GetFieldIDOrDie(env, axisClass, "mTag", "I");
	gAxisClassInfo.mStyleValue = GetFieldIDOrDie(env, axisClass, "mStyleValue", "F");

	return err;
	}

	}