1 /*
2 * Copyright (C) 2013 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 #include "jni.h"
18 #include "core_jni_helpers.h"
19
20 #include "FontUtils.h"
21 #include "GraphicsJNI.h"
22 #include <nativehelper/ScopedPrimitiveArray.h>
23 #include "SkTypeface.h"
24 #include <android_runtime/android_util_AssetManager.h>
25 #include <androidfw/AssetManager.h>
26 #include <hwui/Typeface.h>
27 #include <minikin/FontFamily.h>
28
29 using namespace android;
30
toTypeface(jlong ptr)31 static inline Typeface* toTypeface(jlong ptr) {
32 return reinterpret_cast<Typeface*>(ptr);
33 }
34
toJLong(Ptr ptr)35 template<typename Ptr> static inline jlong toJLong(Ptr ptr) {
36 return reinterpret_cast<jlong>(ptr);
37 }
38
Typeface_createFromTypeface(JNIEnv * env,jobject,jlong familyHandle,jint style)39 static jlong Typeface_createFromTypeface(JNIEnv* env, jobject, jlong familyHandle, jint style) {
40 Typeface* family = toTypeface(familyHandle);
41 Typeface* face = Typeface::createRelative(family, (Typeface::Style)style);
42 // TODO: the following logic shouldn't be necessary, the above should always succeed.
43 // Try to find the closest matching font, using the standard heuristic
44 if (NULL == face) {
45 face = Typeface::createRelative(family, (Typeface::Style)(style ^ Typeface::kItalic));
46 }
47 for (int i = 0; NULL == face && i < 4; i++) {
48 face = Typeface::createRelative(family, (Typeface::Style)i);
49 }
50 return toJLong(face);
51 }
52
Typeface_createFromTypefaceWithExactStyle(JNIEnv * env,jobject,jlong nativeInstance,jint weight,jboolean italic)53 static jlong Typeface_createFromTypefaceWithExactStyle(JNIEnv* env, jobject, jlong nativeInstance,
54 jint weight, jboolean italic) {
55 return toJLong(Typeface::createAbsolute(toTypeface(nativeInstance), weight, italic));
56 }
57
Typeface_createFromTypefaceWithVariation(JNIEnv * env,jobject,jlong familyHandle,jobject listOfAxis)58 static jlong Typeface_createFromTypefaceWithVariation(JNIEnv* env, jobject, jlong familyHandle,
59 jobject listOfAxis) {
60 std::vector<minikin::FontVariation> variations;
61 ListHelper list(env, listOfAxis);
62 for (jint i = 0; i < list.size(); i++) {
63 jobject axisObject = list.get(i);
64 if (axisObject == nullptr) {
65 continue;
66 }
67 AxisHelper axis(env, axisObject);
68 variations.push_back(minikin::FontVariation(axis.getTag(), axis.getStyleValue()));
69 }
70 return toJLong(Typeface::createFromTypefaceWithVariation(toTypeface(familyHandle), variations));
71 }
72
Typeface_createWeightAlias(JNIEnv * env,jobject,jlong familyHandle,jint weight)73 static jlong Typeface_createWeightAlias(JNIEnv* env, jobject, jlong familyHandle, jint weight) {
74 return toJLong(Typeface::createWithDifferentBaseWeight(toTypeface(familyHandle), weight));
75 }
76
releaseFunc(jlong ptr)77 static void releaseFunc(jlong ptr) {
78 delete toTypeface(ptr);
79 }
80
81 // CriticalNative
Typeface_getReleaseFunc()82 static jlong Typeface_getReleaseFunc() {
83 return toJLong(&releaseFunc);
84 }
85
86 // CriticalNative
Typeface_getStyle(jlong faceHandle)87 static jint Typeface_getStyle(jlong faceHandle) {
88 return toTypeface(faceHandle)->fAPIStyle;
89 }
90
91 // CriticalNative
Typeface_getWeight(jlong faceHandle)92 static jint Typeface_getWeight(jlong faceHandle) {
93 return toTypeface(faceHandle)->fStyle.weight();
94 }
95
Typeface_createFromArray(JNIEnv * env,jobject,jlongArray familyArray,int weight,int italic)96 static jlong Typeface_createFromArray(JNIEnv *env, jobject, jlongArray familyArray,
97 int weight, int italic) {
98 ScopedLongArrayRO families(env, familyArray);
99 std::vector<std::shared_ptr<minikin::FontFamily>> familyVec;
100 familyVec.reserve(families.size());
101 for (size_t i = 0; i < families.size(); i++) {
102 FontFamilyWrapper* family = reinterpret_cast<FontFamilyWrapper*>(families[i]);
103 familyVec.emplace_back(family->family);
104 }
105 return toJLong(Typeface::createFromFamilies(std::move(familyVec), weight, italic));
106 }
107
108 // CriticalNative
Typeface_setDefault(jlong faceHandle)109 static void Typeface_setDefault(jlong faceHandle) {
110 Typeface::setDefault(toTypeface(faceHandle));
111 }
112
Typeface_getSupportedAxes(JNIEnv * env,jobject,jlong faceHandle)113 static jobject Typeface_getSupportedAxes(JNIEnv *env, jobject, jlong faceHandle) {
114 Typeface* face = toTypeface(faceHandle);
115 const std::unordered_set<minikin::AxisTag>& tagSet = face->fFontCollection->getSupportedTags();
116 const size_t length = tagSet.size();
117 if (length == 0) {
118 return nullptr;
119 }
120 std::vector<jint> tagVec(length);
121 int index = 0;
122 for (const auto& tag : tagSet) {
123 tagVec[index++] = tag;
124 }
125 std::sort(tagVec.begin(), tagVec.end());
126 const jintArray result = env->NewIntArray(length);
127 env->SetIntArrayRegion(result, 0, length, tagVec.data());
128 return result;
129 }
130
131 ///////////////////////////////////////////////////////////////////////////////
132
133 static const JNINativeMethod gTypefaceMethods[] = {
134 { "nativeCreateFromTypeface", "(JI)J", (void*)Typeface_createFromTypeface },
135 { "nativeCreateFromTypefaceWithExactStyle", "(JIZ)J",
136 (void*)Typeface_createFromTypefaceWithExactStyle },
137 { "nativeCreateFromTypefaceWithVariation", "(JLjava/util/List;)J",
138 (void*)Typeface_createFromTypefaceWithVariation },
139 { "nativeCreateWeightAlias", "(JI)J", (void*)Typeface_createWeightAlias },
140 { "nativeGetReleaseFunc", "()J", (void*)Typeface_getReleaseFunc },
141 { "nativeGetStyle", "(J)I", (void*)Typeface_getStyle },
142 { "nativeGetWeight", "(J)I", (void*)Typeface_getWeight },
143 { "nativeCreateFromArray", "([JII)J",
144 (void*)Typeface_createFromArray },
145 { "nativeSetDefault", "(J)V", (void*)Typeface_setDefault },
146 { "nativeGetSupportedAxes", "(J)[I", (void*)Typeface_getSupportedAxes },
147 };
148
register_android_graphics_Typeface(JNIEnv * env)149 int register_android_graphics_Typeface(JNIEnv* env)
150 {
151 return RegisterMethodsOrDie(env, "android/graphics/Typeface", gTypefaceMethods,
152 NELEM(gTypefaceMethods));
153 }
154