opengl/tools/glgen/stubs/egl/EGL15cHeader.cpp

/*
** Copyright 2018, The Android Open Source Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
**     http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/

#pragma GCC diagnostic ignored "-Wunused-variable"
#pragma GCC diagnostic ignored "-Wunused-function"

#include <android_runtime/AndroidRuntime.h>
#include <nativehelper/JNIHelp.h>
#include <utils/misc.h>
#include "jni.h"

#include <EGL/egl.h>
#include <assert.h>

#include <ui/ANativeObjectBase.h>

static int initialized = 0;

// classes from EGL 1.4
static jclass egldisplayClass;
static jclass eglsurfaceClass;
static jclass eglconfigClass;
static jclass eglcontextClass;
static jclass bufferClass;
static jclass nioAccessClass;

static jfieldID positionID;
static jfieldID limitID;
static jfieldID elementSizeShiftID;

static jmethodID getBasePointerID;
static jmethodID getBaseArrayID;
static jmethodID getBaseArrayOffsetID;

static jmethodID egldisplayGetHandleID;
static jmethodID eglconfigGetHandleID;
static jmethodID eglcontextGetHandleID;
static jmethodID eglsurfaceGetHandleID;

static jmethodID egldisplayConstructor;
static jmethodID eglcontextConstructor;
static jmethodID eglsurfaceConstructor;
static jmethodID eglconfigConstructor;

static jobject eglNoContextObject;
static jobject eglNoDisplayObject;
static jobject eglNoSurfaceObject;

// classes from EGL 1.5
static jclass eglimageClass;
static jclass eglsyncClass;

static jmethodID eglimageGetHandleID;
static jmethodID eglsyncGetHandleID;

static jmethodID eglimageConstructor;
static jmethodID eglsyncConstructor;

static jobject eglNoImageObject;
static jobject eglNoSyncObject;

/* Cache method IDs each time the class is loaded. */

static void nativeClassInit(JNIEnv *_env, jclass glImplClass) {
    // EGL 1.4 Init
    jclass eglconfigClassLocal = _env->FindClass("android/opengl/EGLConfig");
    eglconfigClass = (jclass)_env->NewGlobalRef(eglconfigClassLocal);
    jclass eglcontextClassLocal = _env->FindClass("android/opengl/EGLContext");
    eglcontextClass = (jclass)_env->NewGlobalRef(eglcontextClassLocal);
    jclass egldisplayClassLocal = _env->FindClass("android/opengl/EGLDisplay");
    egldisplayClass = (jclass)_env->NewGlobalRef(egldisplayClassLocal);
    jclass eglsurfaceClassLocal = _env->FindClass("android/opengl/EGLSurface");
    eglsurfaceClass = (jclass)_env->NewGlobalRef(eglsurfaceClassLocal);

    eglconfigGetHandleID = _env->GetMethodID(eglconfigClass, "getNativeHandle", "()J");
    eglcontextGetHandleID = _env->GetMethodID(eglcontextClass, "getNativeHandle", "()J");
    egldisplayGetHandleID = _env->GetMethodID(egldisplayClass, "getNativeHandle", "()J");
    eglsurfaceGetHandleID = _env->GetMethodID(eglsurfaceClass, "getNativeHandle", "()J");

    eglconfigConstructor = _env->GetMethodID(eglconfigClass, "<init>", "(J)V");
    eglcontextConstructor = _env->GetMethodID(eglcontextClass, "<init>", "(J)V");
    egldisplayConstructor = _env->GetMethodID(egldisplayClass, "<init>", "(J)V");
    eglsurfaceConstructor = _env->GetMethodID(eglsurfaceClass, "<init>", "(J)V");

    jobject localeglNoContextObject = _env->NewObject(eglcontextClass, eglcontextConstructor,
                                                      reinterpret_cast<jlong>(EGL_NO_CONTEXT));
    eglNoContextObject = _env->NewGlobalRef(localeglNoContextObject);
    jobject localeglNoDisplayObject = _env->NewObject(egldisplayClass, egldisplayConstructor,
                                                      reinterpret_cast<jlong>(EGL_NO_DISPLAY));
    eglNoDisplayObject = _env->NewGlobalRef(localeglNoDisplayObject);
    jobject localeglNoSurfaceObject = _env->NewObject(eglsurfaceClass, eglsurfaceConstructor,
                                                      reinterpret_cast<jlong>(EGL_NO_SURFACE));
    eglNoSurfaceObject = _env->NewGlobalRef(localeglNoSurfaceObject);

    jclass eglClass = _env->FindClass("android/opengl/EGL15");
    jfieldID noContextFieldID =
            _env->GetStaticFieldID(eglClass, "EGL_NO_CONTEXT", "Landroid/opengl/EGLContext;");
    _env->SetStaticObjectField(eglClass, noContextFieldID, eglNoContextObject);

    jfieldID noDisplayFieldID =
            _env->GetStaticFieldID(eglClass, "EGL_NO_DISPLAY", "Landroid/opengl/EGLDisplay;");
    _env->SetStaticObjectField(eglClass, noDisplayFieldID, eglNoDisplayObject);

    jfieldID noSurfaceFieldID =
            _env->GetStaticFieldID(eglClass, "EGL_NO_SURFACE", "Landroid/opengl/EGLSurface;");
    _env->SetStaticObjectField(eglClass, noSurfaceFieldID, eglNoSurfaceObject);

    // EGL 1.5 init
    jclass nioAccessClassLocal = _env->FindClass("java/nio/NIOAccess");
    nioAccessClass = (jclass)_env->NewGlobalRef(nioAccessClassLocal);

    jclass bufferClassLocal = _env->FindClass("java/nio/Buffer");
    bufferClass = (jclass)_env->NewGlobalRef(bufferClassLocal);

    getBasePointerID =
            _env->GetStaticMethodID(nioAccessClass, "getBasePointer", "(Ljava/nio/Buffer;)J");
    getBaseArrayID = _env->GetStaticMethodID(nioAccessClass, "getBaseArray",
                                             "(Ljava/nio/Buffer;)Ljava/lang/Object;");
    getBaseArrayOffsetID =
            _env->GetStaticMethodID(nioAccessClass, "getBaseArrayOffset", "(Ljava/nio/Buffer;)I");

    positionID = _env->GetFieldID(bufferClass, "position", "I");
    limitID = _env->GetFieldID(bufferClass, "limit", "I");
    elementSizeShiftID = _env->GetFieldID(bufferClass, "_elementSizeShift", "I");

    jclass eglimageClassLocal = _env->FindClass("android/opengl/EGLImage");
    eglimageClass = (jclass)_env->NewGlobalRef(eglimageClassLocal);
    jclass eglsyncClassLocal = _env->FindClass("android/opengl/EGLSync");
    eglsyncClass = (jclass)_env->NewGlobalRef(eglsyncClassLocal);

    eglimageGetHandleID = _env->GetMethodID(eglimageClass, "getNativeHandle", "()J");
    eglsyncGetHandleID = _env->GetMethodID(eglsyncClass, "getNativeHandle", "()J");

    eglimageConstructor = _env->GetMethodID(eglimageClass, "<init>", "(J)V");
    eglsyncConstructor = _env->GetMethodID(eglsyncClass, "<init>", "(J)V");

    jfieldID noImageFieldID =
            _env->GetStaticFieldID(eglClass, "EGL_NO_IMAGE", "Landroid/opengl/EGLImage;");
    _env->SetStaticObjectField(eglClass, noImageFieldID, eglNoImageObject);

    jfieldID noSyncFieldID =
            _env->GetStaticFieldID(eglClass, "EGL_NO_SYNC", "Landroid/opengl/EGLSync;");
    _env->SetStaticObjectField(eglClass, noSyncFieldID, eglNoSyncObject);
}

static void *getPointer(JNIEnv *_env, jobject buffer, jarray *array, jint *remaining,
                        jint *offset) {
    jint position;
    jint limit;
    jint elementSizeShift;
    jlong pointer;

    position = _env->GetIntField(buffer, positionID);
    limit = _env->GetIntField(buffer, limitID);
    elementSizeShift = _env->GetIntField(buffer, elementSizeShiftID);
    *remaining = (limit - position) << elementSizeShift;
    pointer = _env->CallStaticLongMethod(nioAccessClass, getBasePointerID, buffer);
    if (pointer != 0L) {
        *array = NULL;
        return reinterpret_cast<void *>(pointer);
    }
    eglimageGetHandleID = _env->GetMethodID(eglimageClass, "getNativeHandle", "()J");
    eglsyncGetHandleID = _env->GetMethodID(eglsyncClass, "getNativeHandle", "()J");

    *array = (jarray)_env->CallStaticObjectMethod(nioAccessClass, getBaseArrayID, buffer);
    *offset = _env->CallStaticIntMethod(nioAccessClass, getBaseArrayOffsetID, buffer);

    return NULL;
}

static void releasePointer(JNIEnv *_env, jarray array, void *data, jboolean commit) {
    _env->ReleasePrimitiveArrayCritical(array, data, commit ? 0 : JNI_ABORT);
}

static void *fromEGLHandle(JNIEnv *_env, jmethodID mid, jobject obj) {
    if (obj == NULL) {
        jniThrowException(_env, "java/lang/IllegalArgumentException", "Object is set to null.");
    }

    jlong handle = _env->CallLongMethod(obj, mid);
    return reinterpret_cast<void *>(handle);
}

static jobject toEGLHandle(JNIEnv *_env, jclass cls, jmethodID con, void *handle) {
    if (cls == eglimageClass && (EGLImage)handle == EGL_NO_IMAGE) {
        return eglNoImageObject;
    }

    return _env->NewObject(cls, con, reinterpret_cast<jlong>(handle));
}

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