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/*
* Copyright (C) 2018 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 "Minikin"
#include "SkData.h"
#include "SkFontMgr.h"
#include "SkRefCnt.h"
#include "SkTypeface.h"
#include "GraphicsJNI.h"
#include <nativehelper/ScopedUtfChars.h>
#include "Utils.h"
#include "FontUtils.h"
#include <hwui/MinikinSkia.h>
#include <hwui/Typeface.h>
#include <minikin/FontFamily.h>
#include <ui/FatVector.h>
#include <memory>
namespace android {
struct NativeFontBuilder {
std::vector<minikin::FontVariation> axes;
};
static inline NativeFontBuilder* toBuilder(jlong ptr) {
return reinterpret_cast<NativeFontBuilder*>(ptr);
}
static void releaseFont(jlong font) {
delete reinterpret_cast<FontWrapper*>(font);
}
static void release_global_ref(const void* /*data*/, void* context) {
JNIEnv* env = GraphicsJNI::getJNIEnv();
bool needToAttach = (env == nullptr);
if (needToAttach) {
env = GraphicsJNI::attachJNIEnv("release_font_data");
if (env == nullptr) {
ALOGE("failed to attach to thread to release global ref.");
return;
}
}
jobject obj = reinterpret_cast<jobject>(context);
env->DeleteGlobalRef(obj);
}
// Regular JNI
static jlong Font_Builder_initBuilder(JNIEnv*, jobject) {
return reinterpret_cast<jlong>(new NativeFontBuilder());
}
// Critical Native
static void Font_Builder_addAxis(CRITICAL_JNI_PARAMS_COMMA jlong builderPtr, jint tag, jfloat value) {
toBuilder(builderPtr)->axes.emplace_back(static_cast<minikin::AxisTag>(tag), value);
}
// Regular JNI
static jlong Font_Builder_build(JNIEnv* env, jobject clazz, jlong builderPtr, jobject buffer,
jstring filePath, jint weight, jboolean italic, jint ttcIndex) {
NPE_CHECK_RETURN_ZERO(env, buffer);
std::unique_ptr<NativeFontBuilder> builder(toBuilder(builderPtr));
const void* fontPtr = env->GetDirectBufferAddress(buffer);
if (fontPtr == nullptr) {
jniThrowException(env, "java/lang/IllegalArgumentException", "Not a direct buffer");
return 0;
}
jlong fontSize = env->GetDirectBufferCapacity(buffer);
if (fontSize <= 0) {
jniThrowException(env, "java/lang/IllegalArgumentException",
"buffer size must not be zero or negative");
return 0;
}
ScopedUtfChars fontPath(env, filePath);
jobject fontRef = MakeGlobalRefOrDie(env, buffer);
sk_sp<SkData> data(SkData::MakeWithProc(fontPtr, fontSize,
release_global_ref, reinterpret_cast<void*>(fontRef)));
FatVector<SkFontArguments::Axis, 2> skiaAxes;
for (const auto& axis : builder->axes) {
skiaAxes.emplace_back(SkFontArguments::Axis{axis.axisTag, axis.value});
}
std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));
SkFontArguments params;
params.setCollectionIndex(ttcIndex);
params.setAxes(skiaAxes.data(), skiaAxes.size());
sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
sk_sp<SkTypeface> face(fm->makeFromStream(std::move(fontData), params));
if (face == nullptr) {
jniThrowException(env, "java/lang/IllegalArgumentException",
"Failed to create internal object. maybe invalid font data.");
return 0;
}
std::shared_ptr<minikin::MinikinFont> minikinFont =
std::make_shared<MinikinFontSkia>(std::move(face), fontPtr, fontSize,
std::string_view(fontPath.c_str(), fontPath.size()),
ttcIndex, builder->axes);
minikin::Font font = minikin::Font::Builder(minikinFont).setWeight(weight)
.setSlant(static_cast<minikin::FontStyle::Slant>(italic)).build();
return reinterpret_cast<jlong>(new FontWrapper(std::move(font)));
}
// Critical Native
static jlong Font_Builder_getReleaseNativeFont(CRITICAL_JNI_PARAMS) {
return reinterpret_cast<jlong>(releaseFont);
}
///////////////////////////////////////////////////////////////////////////////
static const JNINativeMethod gFontBuilderMethods[] = {
{ "nInitBuilder", "()J", (void*) Font_Builder_initBuilder },
{ "nAddAxis", "(JIF)V", (void*) Font_Builder_addAxis },
{ "nBuild", "(JLjava/nio/ByteBuffer;Ljava/lang/String;IZI)J", (void*) Font_Builder_build },
{ "nGetReleaseNativeFont", "()J", (void*) Font_Builder_getReleaseNativeFont },
};
int register_android_graphics_fonts_Font(JNIEnv* env) {
return RegisterMethodsOrDie(env, "android/graphics/fonts/Font$Builder", gFontBuilderMethods,
NELEM(gFontBuilderMethods));
}
}
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