1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #undef LOG_TAG
18 #define LOG_TAG "Minikin"
19
20 #include "SkData.h"
21 #include "SkFontMgr.h"
22 #include "SkRefCnt.h"
23 #include "SkTypeface.h"
24 #include "GraphicsJNI.h"
25 #include <nativehelper/ScopedUtfChars.h>
26 #include "Utils.h"
27 #include "FontUtils.h"
28
29 #include <hwui/MinikinSkia.h>
30 #include <hwui/Typeface.h>
31 #include <minikin/FontFamily.h>
32 #include <ui/FatVector.h>
33
34 #include <memory>
35
36 namespace android {
37
38 struct NativeFontBuilder {
39 std::vector<minikin::FontVariation> axes;
40 };
41
toBuilder(jlong ptr)42 static inline NativeFontBuilder* toBuilder(jlong ptr) {
43 return reinterpret_cast<NativeFontBuilder*>(ptr);
44 }
45
releaseFont(jlong font)46 static void releaseFont(jlong font) {
47 delete reinterpret_cast<FontWrapper*>(font);
48 }
49
release_global_ref(const void *,void * context)50 static void release_global_ref(const void* /*data*/, void* context) {
51 JNIEnv* env = GraphicsJNI::getJNIEnv();
52 bool needToAttach = (env == nullptr);
53 if (needToAttach) {
54 env = GraphicsJNI::attachJNIEnv("release_font_data");
55 if (env == nullptr) {
56 ALOGE("failed to attach to thread to release global ref.");
57 return;
58 }
59 }
60
61 jobject obj = reinterpret_cast<jobject>(context);
62 env->DeleteGlobalRef(obj);
63 }
64
65 // Regular JNI
Font_Builder_initBuilder(JNIEnv *,jobject)66 static jlong Font_Builder_initBuilder(JNIEnv*, jobject) {
67 return reinterpret_cast<jlong>(new NativeFontBuilder());
68 }
69
70 // Critical Native
Font_Builder_addAxis(CRITICAL_JNI_PARAMS_COMMA jlong builderPtr,jint tag,jfloat value)71 static void Font_Builder_addAxis(CRITICAL_JNI_PARAMS_COMMA jlong builderPtr, jint tag, jfloat value) {
72 toBuilder(builderPtr)->axes.emplace_back(static_cast<minikin::AxisTag>(tag), value);
73 }
74
75 // Regular JNI
Font_Builder_build(JNIEnv * env,jobject clazz,jlong builderPtr,jobject buffer,jstring filePath,jint weight,jboolean italic,jint ttcIndex)76 static jlong Font_Builder_build(JNIEnv* env, jobject clazz, jlong builderPtr, jobject buffer,
77 jstring filePath, jint weight, jboolean italic, jint ttcIndex) {
78 NPE_CHECK_RETURN_ZERO(env, buffer);
79 std::unique_ptr<NativeFontBuilder> builder(toBuilder(builderPtr));
80 const void* fontPtr = env->GetDirectBufferAddress(buffer);
81 if (fontPtr == nullptr) {
82 jniThrowException(env, "java/lang/IllegalArgumentException", "Not a direct buffer");
83 return 0;
84 }
85 jlong fontSize = env->GetDirectBufferCapacity(buffer);
86 if (fontSize <= 0) {
87 jniThrowException(env, "java/lang/IllegalArgumentException",
88 "buffer size must not be zero or negative");
89 return 0;
90 }
91 ScopedUtfChars fontPath(env, filePath);
92 jobject fontRef = MakeGlobalRefOrDie(env, buffer);
93 sk_sp<SkData> data(SkData::MakeWithProc(fontPtr, fontSize,
94 release_global_ref, reinterpret_cast<void*>(fontRef)));
95
96 FatVector<SkFontArguments::Axis, 2> skiaAxes;
97 for (const auto& axis : builder->axes) {
98 skiaAxes.emplace_back(SkFontArguments::Axis{axis.axisTag, axis.value});
99 }
100
101 std::unique_ptr<SkStreamAsset> fontData(new SkMemoryStream(std::move(data)));
102
103 SkFontArguments params;
104 params.setCollectionIndex(ttcIndex);
105 params.setAxes(skiaAxes.data(), skiaAxes.size());
106
107 sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
108 sk_sp<SkTypeface> face(fm->makeFromStream(std::move(fontData), params));
109 if (face == nullptr) {
110 jniThrowException(env, "java/lang/IllegalArgumentException",
111 "Failed to create internal object. maybe invalid font data.");
112 return 0;
113 }
114 std::shared_ptr<minikin::MinikinFont> minikinFont =
115 std::make_shared<MinikinFontSkia>(std::move(face), fontPtr, fontSize,
116 std::string_view(fontPath.c_str(), fontPath.size()),
117 ttcIndex, builder->axes);
118 minikin::Font font = minikin::Font::Builder(minikinFont).setWeight(weight)
119 .setSlant(static_cast<minikin::FontStyle::Slant>(italic)).build();
120 return reinterpret_cast<jlong>(new FontWrapper(std::move(font)));
121 }
122
123 // Critical Native
Font_Builder_getReleaseNativeFont(CRITICAL_JNI_PARAMS)124 static jlong Font_Builder_getReleaseNativeFont(CRITICAL_JNI_PARAMS) {
125 return reinterpret_cast<jlong>(releaseFont);
126 }
127
128 ///////////////////////////////////////////////////////////////////////////////
129
130 static const JNINativeMethod gFontBuilderMethods[] = {
131 { "nInitBuilder", "()J", (void*) Font_Builder_initBuilder },
132 { "nAddAxis", "(JIF)V", (void*) Font_Builder_addAxis },
133 { "nBuild", "(JLjava/nio/ByteBuffer;Ljava/lang/String;IZI)J", (void*) Font_Builder_build },
134 { "nGetReleaseNativeFont", "()J", (void*) Font_Builder_getReleaseNativeFont },
135 };
136
register_android_graphics_fonts_Font(JNIEnv * env)137 int register_android_graphics_fonts_Font(JNIEnv* env) {
138 return RegisterMethodsOrDie(env, "android/graphics/fonts/Font$Builder", gFontBuilderMethods,
139 NELEM(gFontBuilderMethods));
140 }
141
142 }
143