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

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

1 files changed, 142 insertions, 0 deletions

diff --git a/libs/hwui/jni/fonts/Font.cpp b/libs/hwui/jni/fonts/Font.cpp
new file mode 100644
index 000000000000..5714cd1d0390
--- /dev/null
+++ b/libs/hwui/jni/fonts/Font.cpp
@@ -0,0 +1,142 @@
+/*
+ * 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));
+}
+
+}