Movie.cpp revision 08d7778f081aae745e6ad9e5350221b21dbf352e 
1#include "SkMovie.h"
2#include "SkStream.h"
3#include "GraphicsJNI.h"
4#include "SkTemplates.h"
5#include "SkUtils.h"
6#include "CreateJavaOutputStreamAdaptor.h"
7
8#include <utils/Asset.h>
9#include <utils/ResourceTypes.h>
10#include <netinet/in.h>
11
12#if 0
13    #define TRACE_BITMAP(code)  code
14#else
15    #define TRACE_BITMAP(code)
16#endif
17
18static jclass       gMovie_class;
19static jmethodID    gMovie_constructorMethodID;
20static jfieldID     gMovie_nativeInstanceID;
21
22jobject create_jmovie(JNIEnv* env, SkMovie* moov) {
23    if (NULL == moov) {
24        return NULL;
25    }
26    jobject obj = env->AllocObject(gMovie_class);
27    if (obj) {
28        env->CallVoidMethod(obj, gMovie_constructorMethodID, (jint)moov);
29    }
30    return obj;
31}
32
33static SkMovie* J2Movie(JNIEnv* env, jobject movie) {
34    SkASSERT(env);
35    SkASSERT(movie);
36    SkASSERT(env->IsInstanceOf(movie, gMovie_class));
37    SkMovie* m = (SkMovie*)env->GetIntField(movie, gMovie_nativeInstanceID);
38    SkASSERT(m);
39    return m;
40}
41
42///////////////////////////////////////////////////////////////////////////////
43
44static int movie_width(JNIEnv* env, jobject movie) {
45    NPE_CHECK_RETURN_ZERO(env, movie);
46    return J2Movie(env, movie)->width();
47}
48
49static int movie_height(JNIEnv* env, jobject movie) {
50    NPE_CHECK_RETURN_ZERO(env, movie);
51    return J2Movie(env, movie)->height();
52}
53
54static jboolean movie_isOpaque(JNIEnv* env, jobject movie) {
55    NPE_CHECK_RETURN_ZERO(env, movie);
56    return J2Movie(env, movie)->isOpaque();
57}
58
59static int movie_duration(JNIEnv* env, jobject movie) {
60    NPE_CHECK_RETURN_ZERO(env, movie);
61    return J2Movie(env, movie)->duration();
62}
63
64static jboolean movie_setTime(JNIEnv* env, jobject movie, int ms) {
65    NPE_CHECK_RETURN_ZERO(env, movie);
66    return J2Movie(env, movie)->setTime(ms);
67}
68
69static void movie_draw(JNIEnv* env, jobject movie, jobject canvas,
70                       jfloat fx, jfloat fy, jobject jpaint) {
71    NPE_CHECK_RETURN_VOID(env, movie);
72    NPE_CHECK_RETURN_VOID(env, canvas);
73    // its OK for paint to be null
74
75    SkMovie* m = J2Movie(env, movie);
76    SkCanvas* c = GraphicsJNI::getNativeCanvas(env, canvas);
77    SkScalar sx = SkFloatToScalar(fx);
78    SkScalar sy = SkFloatToScalar(fy);
79    const SkBitmap& b = m->bitmap();
80    const SkPaint* p = jpaint ? GraphicsJNI::getNativePaint(env, jpaint) : NULL;
81
82    c->drawBitmap(b, sx, sy, p);
83}
84
85static jobject movie_decodeStream(JNIEnv* env, jobject clazz, jobject istream) {
86
87    NPE_CHECK_RETURN_ZERO(env, istream);
88
89    // what is the lifetime of the array? Can the skstream hold onto it?
90    jbyteArray byteArray = env->NewByteArray(16*1024);
91    SkStream* strm = CreateJavaInputStreamAdaptor(env, istream, byteArray);
92    if (NULL == strm) {
93        return 0;
94    }
95
96    SkMovie* moov = SkMovie::DecodeStream(strm);
97    strm->unref();
98    return create_jmovie(env, moov);
99}
100
101static jobject movie_decodeByteArray(JNIEnv* env, jobject clazz,
102                                     jbyteArray byteArray,
103                                     int offset, int length) {
104
105    NPE_CHECK_RETURN_ZERO(env, byteArray);
106
107    int totalLength = env->GetArrayLength(byteArray);
108    if ((offset | length) < 0 || offset + length > totalLength) {
109        doThrow(env, "java/lang/ArrayIndexOutOfBoundsException");
110        return 0;
111    }
112
113    AutoJavaByteArray   ar(env, byteArray);
114    SkMovie* moov = SkMovie::DecodeMemory(ar.ptr() + offset, length);
115    return create_jmovie(env, moov);
116}
117
118static void movie_destructor(JNIEnv* env, jobject, SkMovie* movie) {
119    delete movie;
120}
121
122//////////////////////////////////////////////////////////////////////////////////////////////
123
124#include <android_runtime/AndroidRuntime.h>
125
126static JNINativeMethod gMethods[] = {
127    {   "width",    "()I",  (void*)movie_width  },
128    {   "height",   "()I",  (void*)movie_height  },
129    {   "isOpaque", "()Z",  (void*)movie_isOpaque  },
130    {   "duration", "()I",  (void*)movie_duration  },
131    {   "setTime",  "(I)Z", (void*)movie_setTime  },
132    {   "draw",     "(Landroid/graphics/Canvas;FFLandroid/graphics/Paint;)V",
133                            (void*)movie_draw  },
134    { "decodeStream", "(Ljava/io/InputStream;)Landroid/graphics/Movie;",
135                            (void*)movie_decodeStream },
136    { "nativeDestructor","(I)V", (void*)movie_destructor },
137    { "decodeByteArray", "([BII)Landroid/graphics/Movie;",
138                            (void*)movie_decodeByteArray },
139};
140
141#define kClassPathName  "android/graphics/Movie"
142
143#define RETURN_ERR_IF_NULL(value)   do { if (!(value)) { assert(0); return -1; } } while (false)
144
145int register_android_graphics_Movie(JNIEnv* env);
146int register_android_graphics_Movie(JNIEnv* env)
147{
148    gMovie_class = env->FindClass(kClassPathName);
149    RETURN_ERR_IF_NULL(gMovie_class);
150    gMovie_class = (jclass)env->NewGlobalRef(gMovie_class);
151
152    gMovie_constructorMethodID = env->GetMethodID(gMovie_class, "<init>", "(I)V");
153    RETURN_ERR_IF_NULL(gMovie_constructorMethodID);
154
155    gMovie_nativeInstanceID = env->GetFieldID(gMovie_class, "mNativeMovie", "I");
156    RETURN_ERR_IF_NULL(gMovie_nativeInstanceID);
157
158    return android::AndroidRuntime::registerNativeMethods(env, kClassPathName,
159                                                       gMethods, SK_ARRAY_COUNT(gMethods));
160}
161