Created HardwareBufferRenderer to support rendering into
HardwareBuffer targets.
Relnote: "Created HardwareBufferRenderer API to handle
rendering a single frame into a HardwareBuffer target."
Refactored dlsym logic for dynamically resolving AHardwareBuffer
methods to be shared across multiple locations.
Bug: 255692581
Test: Created HardwareBufferRendererTests
Change-Id: I749b5d763a9ee580abc2d6cc87bd94a46b7abdd9
diff --git a/libs/hwui/jni/HardwareBufferHelpers.cpp b/libs/hwui/jni/HardwareBufferHelpers.cpp
new file mode 100644
index 0000000..7e3f771
--- /dev/null
+++ b/libs/hwui/jni/HardwareBufferHelpers.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#include "HardwareBufferHelpers.h"
+
+#include <dlfcn.h>
+#include <log/log.h>
+
+#ifdef __ANDROID__
+typedef AHardwareBuffer* (*AHB_from_HB)(JNIEnv*, jobject);
+typedef jobject (*AHB_to_HB)(JNIEnv*, AHardwareBuffer*);
+static AHB_from_HB fromHardwareBuffer = nullptr;
+static AHB_to_HB toHardwareBuffer = nullptr;
+#endif
+
+void android::uirenderer::HardwareBufferHelpers::init() {
+#ifdef __ANDROID__ // Layoutlib does not support graphic buffer or parcel
+ void* handle_ = dlopen("libandroid.so", RTLD_NOW | RTLD_NODELETE);
+ fromHardwareBuffer = (AHB_from_HB)dlsym(handle_, "AHardwareBuffer_fromHardwareBuffer");
+ LOG_ALWAYS_FATAL_IF(fromHardwareBuffer == nullptr,
+ "Failed to find required symbol AHardwareBuffer_fromHardwareBuffer!");
+
+ toHardwareBuffer = (AHB_to_HB)dlsym(handle_, "AHardwareBuffer_toHardwareBuffer");
+ LOG_ALWAYS_FATAL_IF(toHardwareBuffer == nullptr,
+ " Failed to find required symbol AHardwareBuffer_toHardwareBuffer!");
+#endif
+}
+
+AHardwareBuffer* android::uirenderer::HardwareBufferHelpers::AHardwareBuffer_fromHardwareBuffer(
+ JNIEnv* env, jobject hardwarebuffer) {
+#ifdef __ANDROID__
+ LOG_ALWAYS_FATAL_IF(fromHardwareBuffer == nullptr,
+ "Failed to find symbol AHardwareBuffer_fromHardwareBuffer, did you forget "
+ "to call HardwareBufferHelpers::init?");
+ return fromHardwareBuffer(env, hardwarebuffer);
+#else
+ ALOGE("ERROR attempting to invoke AHardwareBuffer_fromHardwareBuffer on non Android "
+ "configuration");
+ return nullptr;
+#endif
+}
+
+jobject android::uirenderer::HardwareBufferHelpers::AHardwareBuffer_toHardwareBuffer(
+ JNIEnv* env, AHardwareBuffer* ahardwarebuffer) {
+#ifdef __ANDROID__
+ LOG_ALWAYS_FATAL_IF(toHardwareBuffer == nullptr,
+ "Failed to find symbol AHardwareBuffer_toHardwareBuffer, did you forget to "
+ "call HardwareBufferHelpers::init?");
+ return toHardwareBuffer(env, ahardwarebuffer);
+#else
+ ALOGE("ERROR attempting to invoke AHardwareBuffer_toHardwareBuffer on non Android "
+ "configuration");
+ return nullptr;
+#endif
+}
\ No newline at end of file