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/*
* Copyright (C) 2010 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.
*/
#define LOG_TAG "HardwareRenderer"
#include "jni.h"
#include <nativehelper/JNIHelp.h>
#include <android_runtime/AndroidRuntime.h>
#include <EGL/egl_cache.h>
#ifdef USE_OPENGL_RENDERER
EGLAPI void EGLAPIENTRY eglBeginFrame(EGLDisplay dpy, EGLSurface surface);
#endif
namespace android {
/**
* Note: OpenGLRenderer JNI layer is generated and compiled only on supported
* devices. This means all the logic must be compiled only when the
* preprocessor variable USE_OPENGL_RENDERER is defined.
*/
#ifdef USE_OPENGL_RENDERER
// ----------------------------------------------------------------------------
// Defines
// ----------------------------------------------------------------------------
// Debug
#define DEBUG_RENDERER 0
// Debug
#if DEBUG_RENDERER
#define RENDERER_LOGD(...) ALOGD(__VA_ARGS__)
#else
#define RENDERER_LOGD(...)
#endif
// ----------------------------------------------------------------------------
// Surface and display management
// ----------------------------------------------------------------------------
static jboolean android_view_HardwareRenderer_preserveBackBuffer(JNIEnv* env, jobject clazz) {
EGLDisplay display = eglGetCurrentDisplay();
EGLSurface surface = eglGetCurrentSurface(EGL_DRAW);
eglGetError();
eglSurfaceAttrib(display, surface, EGL_SWAP_BEHAVIOR, EGL_BUFFER_PRESERVED);
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
RENDERER_LOGD("Could not enable buffer preserved swap behavior (%x)", error);
}
return error == EGL_SUCCESS;
}
static jboolean android_view_HardwareRenderer_isBackBufferPreserved(JNIEnv* env, jobject clazz) {
EGLDisplay display = eglGetCurrentDisplay();
EGLSurface surface = eglGetCurrentSurface(EGL_DRAW);
EGLint value;
eglGetError();
eglQuerySurface(display, surface, EGL_SWAP_BEHAVIOR, &value);
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
RENDERER_LOGD("Could not query buffer preserved swap behavior (%x)", error);
}
return error == EGL_SUCCESS && value == EGL_BUFFER_PRESERVED;
}
static void android_view_HardwareRenderer_disableVsync(JNIEnv* env, jobject clazz) {
EGLDisplay display = eglGetCurrentDisplay();
eglGetError();
eglSwapInterval(display, 0);
EGLint error = eglGetError();
if (error != EGL_SUCCESS) {
RENDERER_LOGD("Could not disable v-sync (%x)", error);
}
}
// ----------------------------------------------------------------------------
// Tracing and debugging
// ----------------------------------------------------------------------------
static void android_view_HardwareRenderer_beginFrame(JNIEnv* env, jobject clazz,
jintArray size) {
EGLDisplay display = eglGetCurrentDisplay();
EGLSurface surface = eglGetCurrentSurface(EGL_DRAW);
if (size) {
EGLint value;
jint* storage = env->GetIntArrayElements(size, NULL);
eglQuerySurface(display, surface, EGL_WIDTH, &value);
storage[0] = value;
eglQuerySurface(display, surface, EGL_HEIGHT, &value);
storage[1] = value;
env->ReleaseIntArrayElements(size, storage, 0);
}
eglBeginFrame(display, surface);
}
#endif // USE_OPENGL_RENDERER
// ----------------------------------------------------------------------------
// Shaders
// ----------------------------------------------------------------------------
static void android_view_HardwareRenderer_setupShadersDiskCache(JNIEnv* env, jobject clazz,
jstring diskCachePath) {
const char* cacheArray = env->GetStringUTFChars(diskCachePath, NULL);
egl_cache_t::get()->setCacheFilename(cacheArray);
env->ReleaseStringUTFChars(diskCachePath, cacheArray);
}
// ----------------------------------------------------------------------------
// JNI Glue
// ----------------------------------------------------------------------------
const char* const kClassPathName = "android/view/HardwareRenderer";
static JNINativeMethod gMethods[] = {
#ifdef USE_OPENGL_RENDERER
{ "nIsBackBufferPreserved", "()Z", (void*) android_view_HardwareRenderer_isBackBufferPreserved },
{ "nPreserveBackBuffer", "()Z", (void*) android_view_HardwareRenderer_preserveBackBuffer },
{ "nDisableVsync", "()V", (void*) android_view_HardwareRenderer_disableVsync },
{ "nBeginFrame", "([I)V", (void*) android_view_HardwareRenderer_beginFrame },
#endif
{ "nSetupShadersDiskCache", "(Ljava/lang/String;)V",
(void*) android_view_HardwareRenderer_setupShadersDiskCache },
};
int register_android_view_HardwareRenderer(JNIEnv* env) {
return AndroidRuntime::registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods));
}
};
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