| #include "jni.h" |
| #include <android_runtime/AndroidRuntime.h> |
| |
| #include "GraphicsJNI.h" |
| #include "SkStream.h" |
| #include "SkTypeface.h" |
| #include <android_runtime/android_util_AssetManager.h> |
| #include <androidfw/AssetManager.h> |
| |
| using namespace android; |
| |
| class AutoJavaStringToUTF8 { |
| public: |
| AutoJavaStringToUTF8(JNIEnv* env, jstring str) : fEnv(env), fJStr(str) |
| { |
| fCStr = env->GetStringUTFChars(str, NULL); |
| } |
| ~AutoJavaStringToUTF8() |
| { |
| fEnv->ReleaseStringUTFChars(fJStr, fCStr); |
| } |
| const char* c_str() const { return fCStr; } |
| |
| private: |
| JNIEnv* fEnv; |
| jstring fJStr; |
| const char* fCStr; |
| }; |
| |
| static SkTypeface* Typeface_create(JNIEnv* env, jobject, jstring name, |
| SkTypeface::Style style) { |
| SkTypeface* face; |
| |
| if (NULL == name) { |
| face = SkTypeface::CreateFromName(NULL, (SkTypeface::Style)style); |
| } |
| else { |
| AutoJavaStringToUTF8 str(env, name); |
| face = SkTypeface::CreateFromName(str.c_str(), style); |
| } |
| return face; |
| } |
| |
| static SkTypeface* Typeface_createFromTypeface(JNIEnv* env, jobject, SkTypeface* family, int style) { |
| return SkTypeface::CreateFromTypeface(family, (SkTypeface::Style)style); |
| } |
| |
| static void Typeface_unref(JNIEnv* env, jobject obj, SkTypeface* face) { |
| SkSafeUnref(face); |
| } |
| |
| static int Typeface_getStyle(JNIEnv* env, jobject obj, SkTypeface* face) { |
| return face->style(); |
| } |
| |
| class AssetStream : public SkStream { |
| public: |
| AssetStream(Asset* asset, bool hasMemoryBase) : fAsset(asset) |
| { |
| fMemoryBase = hasMemoryBase ? fAsset->getBuffer(false) : NULL; |
| } |
| |
| virtual ~AssetStream() |
| { |
| delete fAsset; |
| } |
| |
| virtual const void* getMemoryBase() |
| { |
| return fMemoryBase; |
| } |
| |
| virtual bool rewind() |
| { |
| off64_t pos = fAsset->seek(0, SEEK_SET); |
| return pos != (off64_t)-1; |
| } |
| |
| virtual size_t read(void* buffer, size_t size) |
| { |
| ssize_t amount; |
| |
| if (NULL == buffer) |
| { |
| if (0 == size) // caller is asking us for our total length |
| return fAsset->getLength(); |
| |
| // asset->seek returns new total offset |
| // we want to return amount that was skipped |
| |
| off64_t oldOffset = fAsset->seek(0, SEEK_CUR); |
| if (-1 == oldOffset) |
| return 0; |
| off64_t newOffset = fAsset->seek(size, SEEK_CUR); |
| if (-1 == newOffset) |
| return 0; |
| |
| amount = newOffset - oldOffset; |
| } |
| else |
| { |
| amount = fAsset->read(buffer, size); |
| } |
| |
| if (amount < 0) |
| amount = 0; |
| return amount; |
| } |
| |
| private: |
| Asset* fAsset; |
| const void* fMemoryBase; |
| }; |
| |
| static SkTypeface* Typeface_createFromAsset(JNIEnv* env, jobject, |
| jobject jassetMgr, |
| jstring jpath) { |
| |
| NPE_CHECK_RETURN_ZERO(env, jassetMgr); |
| NPE_CHECK_RETURN_ZERO(env, jpath); |
| |
| AssetManager* mgr = assetManagerForJavaObject(env, jassetMgr); |
| if (NULL == mgr) { |
| return NULL; |
| } |
| |
| AutoJavaStringToUTF8 str(env, jpath); |
| Asset* asset = mgr->open(str.c_str(), Asset::ACCESS_BUFFER); |
| if (NULL == asset) { |
| return NULL; |
| } |
| |
| SkStream* stream = new AssetStream(asset, true); |
| SkTypeface* face = SkTypeface::CreateFromStream(stream); |
| // SkTypeFace::CreateFromStream calls ref() on the stream, so we |
| // need to unref it here or it won't be freed later on |
| stream->unref(); |
| |
| return face; |
| } |
| |
| static SkTypeface* Typeface_createFromFile(JNIEnv* env, jobject, jstring jpath) { |
| NPE_CHECK_RETURN_ZERO(env, jpath); |
| |
| AutoJavaStringToUTF8 str(env, jpath); |
| |
| return SkTypeface::CreateFromFile(str.c_str()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static JNINativeMethod gTypefaceMethods[] = { |
| { "nativeCreate", "(Ljava/lang/String;I)I", (void*)Typeface_create }, |
| { "nativeCreateFromTypeface", "(II)I", (void*)Typeface_createFromTypeface }, |
| { "nativeUnref", "(I)V", (void*)Typeface_unref }, |
| { "nativeGetStyle", "(I)I", (void*)Typeface_getStyle }, |
| { "nativeCreateFromAsset", "(Landroid/content/res/AssetManager;Ljava/lang/String;)I", |
| (void*)Typeface_createFromAsset }, |
| { "nativeCreateFromFile", "(Ljava/lang/String;)I", |
| (void*)Typeface_createFromFile }, |
| }; |
| |
| int register_android_graphics_Typeface(JNIEnv* env) |
| { |
| return android::AndroidRuntime::registerNativeMethods(env, |
| "android/graphics/Typeface", |
| gTypefaceMethods, |
| SK_ARRAY_COUNT(gTypefaceMethods)); |
| } |