FontFamily.cpp revision d573794d83a049fe59e289944f0cd77406dd776a 
1/*
2 * Copyright (C) 2014 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#define LOG_TAG "Minikin"
18
19#include "JNIHelp.h"
20#include <android_runtime/AndroidRuntime.h>
21
22#include "SkTypeface.h"
23#include "GraphicsJNI.h"
24#include <ScopedPrimitiveArray.h>
25#include <ScopedUtfChars.h>
26#include <android_runtime/android_util_AssetManager.h>
27#include <androidfw/AssetManager.h>
28#include "Utils.h"
29
30#ifdef USE_MINIKIN
31#include <minikin/FontFamily.h>
32#include "MinikinSkia.h"
33#endif
34
35namespace android {
36
37static jlong FontFamily_create(JNIEnv* env, jobject clazz, jstring lang, jint variant) {
38#ifdef USE_MINIKIN
39    FontLanguage fontLanguage;
40    if (lang != NULL) {
41        ScopedUtfChars str(env, lang);
42        fontLanguage = FontLanguage(str.c_str(), str.size());
43    }
44    return (jlong)new FontFamily(fontLanguage, variant);
45#else
46    return 0;
47#endif
48}
49
50static void FontFamily_unref(JNIEnv* env, jobject clazz, jlong familyPtr) {
51#ifdef USE_MINIKIN
52    FontFamily* fontFamily = reinterpret_cast<FontFamily*>(familyPtr);
53    fontFamily->Unref();
54#endif
55}
56
57#ifdef USE_MINIKIN
58static jboolean addSkTypeface(FontFamily* family, SkTypeface* face) {
59    MinikinFont* minikinFont = new MinikinFontSkia(face);
60    bool result = family->addFont(minikinFont);
61    minikinFont->Unref();
62    return result;
63}
64#endif
65
66static jboolean FontFamily_addFont(JNIEnv* env, jobject clazz, jlong familyPtr, jstring path) {
67#ifdef USE_MINIKIN
68    NPE_CHECK_RETURN_ZERO(env, path);
69    ScopedUtfChars str(env, path);
70    SkTypeface* face = SkTypeface::CreateFromFile(str.c_str());
71    if (face == NULL) {
72        ALOGE("addFont failed to create font %s", str.c_str());
73        return false;
74    }
75    FontFamily* fontFamily = (FontFamily*)familyPtr;
76    return addSkTypeface(fontFamily, face);
77#else
78    return false;
79#endif
80}
81
82static jboolean FontFamily_addFontFromAsset(JNIEnv* env, jobject, jlong familyPtr,
83        jobject jassetMgr, jstring jpath) {
84#ifdef USE_MINIKIN
85    NPE_CHECK_RETURN_ZERO(env, jassetMgr);
86    NPE_CHECK_RETURN_ZERO(env, jpath);
87
88    AssetManager* mgr = assetManagerForJavaObject(env, jassetMgr);
89    if (NULL == mgr) {
90        return false;
91    }
92
93    ScopedUtfChars str(env, jpath);
94    Asset* asset = mgr->open(str.c_str(), Asset::ACCESS_BUFFER);
95    if (NULL == asset) {
96        return false;
97    }
98
99    SkStream* stream = new AssetStreamAdaptor(asset,
100                                              AssetStreamAdaptor::kYes_OwnAsset,
101                                              AssetStreamAdaptor::kYes_HasMemoryBase);
102    SkTypeface* face = SkTypeface::CreateFromStream(stream);
103    // Note: SkTypeface::CreateFromStream holds its own reference to the stream
104    stream->unref();
105    if (face == NULL) {
106        ALOGE("addFontFromAsset failed to create font %s", str.c_str());
107        return false;
108    }
109    FontFamily* fontFamily = (FontFamily*)familyPtr;
110    return addSkTypeface(fontFamily, face);
111#else
112    return false;
113#endif
114}
115
116///////////////////////////////////////////////////////////////////////////////
117
118static JNINativeMethod gFontFamilyMethods[] = {
119    { "nCreateFamily",            "(Ljava/lang/String;I)J", (void*)FontFamily_create },
120    { "nUnrefFamily",             "(J)V", (void*)FontFamily_unref },
121    { "nAddFont",                 "(JLjava/lang/String;)Z", (void*)FontFamily_addFont },
122    { "nAddFontFromAsset",        "(JLandroid/content/res/AssetManager;Ljava/lang/String;)Z",
123                                           (void*)FontFamily_addFontFromAsset },
124};
125
126int register_android_graphics_FontFamily(JNIEnv* env)
127{
128    return android::AndroidRuntime::registerNativeMethods(env,
129        "android/graphics/FontFamily",
130        gFontFamilyMethods, NELEM(gFontFamilyMethods));
131}
132
133}
134