GLES10ExtcHeader.cpp revision 9875750593aae7c2a62f33c620809d49162393eb
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
28static int initialized = 0;
29
30static jclass nioAccessClass;
31static jclass bufferClass;
32static jmethodID getBasePointerID;
33static jmethodID getBaseArrayID;
34static jmethodID getBaseArrayOffsetID;
35static jfieldID positionID;
36static jfieldID limitID;
37static jfieldID elementSizeShiftID;
38
39/* Cache method IDs each time the class is loaded. */
40
41static void
42nativeClassInit(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
64static void *
65getPointer(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
95static void
96releasePointer(JNIEnv *_env, jarray array, void *data, jboolean commit)
97{
98    _env->ReleasePrimitiveArrayCritical(array, data,
99					   commit ? 0 : JNI_ABORT);
100}
101
102// --------------------------------------------------------------------------
103