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/* special calls implemented in Android's GLES wrapper used to more 29 * efficiently bound-check passed arrays */ 30extern "C" { 31GL_API void GL_APIENTRY glMatrixIndexPointerOESBounds(GLint size, GLenum type, GLsizei stride, 32 const GLvoid *ptr, GLsizei count); 33GL_API void GL_APIENTRY glWeightPointerOESBounds(GLint size, GLenum type, GLsizei stride, 34 const GLvoid *ptr, GLsizei count); 35} 36 37static int initialized = 0; 38 39static jclass nioAccessClass; 40static jclass bufferClass; 41static jmethodID getBasePointerID; 42static jmethodID getBaseArrayID; 43static jmethodID getBaseArrayOffsetID; 44static jfieldID positionID; 45static jfieldID limitID; 46static jfieldID elementSizeShiftID; 47 48/* Cache method IDs each time the class is loaded. */ 49 50static void 51nativeClassInit(JNIEnv *_env, jclass glImplClass) 52{ 53 jclass nioAccessClassLocal = _env->FindClass("java/nio/NIOAccess"); 54 nioAccessClass = (jclass) _env->NewGlobalRef(nioAccessClassLocal); 55 56 jclass bufferClassLocal = _env->FindClass("java/nio/Buffer"); 57 bufferClass = (jclass) _env->NewGlobalRef(bufferClassLocal); 58 59 getBasePointerID = _env->GetStaticMethodID(nioAccessClass, 60 "getBasePointer", "(Ljava/nio/Buffer;)J"); 61 getBaseArrayID = _env->GetStaticMethodID(nioAccessClass, 62 "getBaseArray", "(Ljava/nio/Buffer;)Ljava/lang/Object;"); 63 getBaseArrayOffsetID = _env->GetStaticMethodID(nioAccessClass, 64 "getBaseArrayOffset", "(Ljava/nio/Buffer;)I"); 65 66 positionID = _env->GetFieldID(bufferClass, "position", "I"); 67 limitID = _env->GetFieldID(bufferClass, "limit", "I"); 68 elementSizeShiftID = 69 _env->GetFieldID(bufferClass, "_elementSizeShift", "I"); 70} 71 72 73static void * 74getPointer(JNIEnv *_env, jobject buffer, jarray *array, jint *remaining, jint *offset) 75{ 76 jint position; 77 jint limit; 78 jint elementSizeShift; 79 jlong pointer; 80 81 position = _env->GetIntField(buffer, positionID); 82 limit = _env->GetIntField(buffer, limitID); 83 elementSizeShift = _env->GetIntField(buffer, elementSizeShiftID); 84 *remaining = (limit - position) << elementSizeShift; 85 pointer = _env->CallStaticLongMethod(nioAccessClass, 86 getBasePointerID, buffer); 87 if (pointer != 0L) { 88 *array = NULL; 89 return (void *) (jint) pointer; 90 } 91 92 *array = (jarray) _env->CallStaticObjectMethod(nioAccessClass, 93 getBaseArrayID, buffer); 94 *offset = _env->CallStaticIntMethod(nioAccessClass, 95 getBaseArrayOffsetID, buffer); 96 return NULL; 97} 98 99 100static void 101releasePointer(JNIEnv *_env, jarray array, void *data, jboolean commit) 102{ 103 _env->ReleasePrimitiveArrayCritical(array, data, 104 commit ? 0 : JNI_ABORT); 105} 106 107static void * 108getDirectBufferPointer(JNIEnv *_env, jobject buffer) { 109 char* buf = (char*) _env->GetDirectBufferAddress(buffer); 110 if (buf) { 111 jint position = _env->GetIntField(buffer, positionID); 112 jint elementSizeShift = _env->GetIntField(buffer, elementSizeShiftID); 113 buf += position << elementSizeShift; 114 } else { 115 jniThrowException(_env, "java/lang/IllegalArgumentException", 116 "Must use a native order direct Buffer"); 117 } 118 return (void*) buf; 119} 120// -------------------------------------------------------------------------- 121