1 **
2 ** Copyright 2009, 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 // This source file is automatically generated
18
19 #include "jni.h"
20 #include "JNIHelp.h"
21 #include <android_runtime/AndroidRuntime.h>
22 #include <utils/misc.h>
23
24 #include <assert.h>
25 #include <GLES/gl.h>
26 #include <GLES/glext.h>
27
28 static int initialized = 0;
29
30 static jclass nioAccessClass;
31 static jclass bufferClass;
32 static jmethodID getBasePointerID;
33 static jmethodID getBaseArrayID;
34 static jmethodID getBaseArrayOffsetID;
35 static jfieldID positionID;
36 static jfieldID limitID;
37 static jfieldID elementSizeShiftID;
38
39 /* Cache method IDs each time the class is loaded. */
40
41 static void
nativeClassInit(JNIEnv * _env,jclass glImplClass)42 nativeClassInit(JNIEnv *_env, jclass glImplClass)
43 {
44 jclass nioAccessClassLocal = _env->FindClass("java/nio/NIOAccess");
45 nioAccessClass = (jclass) _env->NewGlobalRef(nioAccessClassLocal);
46
47 jclass bufferClassLocal = _env->FindClass("java/nio/Buffer");
48 bufferClass = (jclass) _env->NewGlobalRef(bufferClassLocal);
49
50 getBasePointerID = _env->GetStaticMethodID(nioAccessClass,
51 "getBasePointer", "(Ljava/nio/Buffer;)J");
52 getBaseArrayID = _env->GetStaticMethodID(nioAccessClass,
53 "getBaseArray", "(Ljava/nio/Buffer;)Ljava/lang/Object;");
54 getBaseArrayOffsetID = _env->GetStaticMethodID(nioAccessClass,
55 "getBaseArrayOffset", "(Ljava/nio/Buffer;)I");
56
57 positionID = _env->GetFieldID(bufferClass, "position", "I");
58 limitID = _env->GetFieldID(bufferClass, "limit", "I");
59 elementSizeShiftID =
60 _env->GetFieldID(bufferClass, "_elementSizeShift", "I");
61 }
62
63
64 static void *
getPointer(JNIEnv * _env,jobject buffer,jarray * array,jint * remaining)65 getPointer(JNIEnv *_env, jobject buffer, jarray *array, jint *remaining)
66 {
67 jint position;
68 jint limit;
69 jint elementSizeShift;
70 jlong pointer;
71 jint offset;
72 void *data;
73
74 position = _env->GetIntField(buffer, positionID);
75 limit = _env->GetIntField(buffer, limitID);
76 elementSizeShift = _env->GetIntField(buffer, elementSizeShiftID);
77 *remaining = (limit - position) << elementSizeShift;
78 pointer = _env->CallStaticLongMethod(nioAccessClass,
79 getBasePointerID, buffer);
80 if (pointer != 0L) {
81 *array = NULL;
82 return (void *) (jint) pointer;
83 }
84
85 *array = (jarray) _env->CallStaticObjectMethod(nioAccessClass,
86 getBaseArrayID, buffer);
87 offset = _env->CallStaticIntMethod(nioAccessClass,
88 getBaseArrayOffsetID, buffer);
89 data = _env->GetPrimitiveArrayCritical(*array, (jboolean *) 0);
90
91 return (void *) ((char *) data + offset);
92 }
93
94
95 static void
releasePointer(JNIEnv * _env,jarray array,void * data,jboolean commit)96 releasePointer(JNIEnv *_env, jarray array, void *data, jboolean commit)
97 {
98 _env->ReleasePrimitiveArrayCritical(array, data,
99 commit ? 0 : JNI_ABORT);
100 }
101
102 // --------------------------------------------------------------------------
103