diff --git a/hwcutils.cpp b/hwcutils.cpp
new file mode 100644
index 0000000..0091575
--- /dev/null
+++ b/hwcutils.cpp
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2016 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 ATRACE_TAG ATRACE_TAG_GRAPHICS
+#define LOG_TAG "hwc-drm-utils"
+
+#include "drmhwcomposer.h"
+#include "platform.h"
+
+#include <cutils/log.h>
+
+namespace android {
+
+const hwc_drm_bo *DrmHwcBuffer::operator->() const {
+  if (importer_ == NULL) {
+    ALOGE("Access of non-existent BO");
+    exit(1);
+    return NULL;
+  }
+  return &bo_;
+}
+
+void DrmHwcBuffer::Clear() {
+  if (importer_ != NULL) {
+    importer_->ReleaseBuffer(&bo_);
+    importer_ = NULL;
+  }
+}
+
+int DrmHwcBuffer::ImportBuffer(buffer_handle_t handle, Importer *importer) {
+  hwc_drm_bo tmp_bo;
+
+  int ret = importer->ImportBuffer(handle, &tmp_bo);
+  if (ret)
+    return ret;
+
+  if (importer_ != NULL) {
+    importer_->ReleaseBuffer(&bo_);
+  }
+
+  importer_ = importer;
+
+  bo_ = tmp_bo;
+
+  return 0;
+}
+
+static native_handle_t *dup_buffer_handle(buffer_handle_t handle) {
+  native_handle_t *new_handle =
+      native_handle_create(handle->numFds, handle->numInts);
+  if (new_handle == NULL)
+    return NULL;
+
+  const int *old_data = handle->data;
+  int *new_data = new_handle->data;
+  for (int i = 0; i < handle->numFds; i++) {
+    *new_data = dup(*old_data);
+    old_data++;
+    new_data++;
+  }
+  memcpy(new_data, old_data, sizeof(int) * handle->numInts);
+
+  return new_handle;
+}
+
+static void free_buffer_handle(native_handle_t *handle) {
+  int ret = native_handle_close(handle);
+  if (ret)
+    ALOGE("Failed to close native handle %d", ret);
+  ret = native_handle_delete(handle);
+  if (ret)
+    ALOGE("Failed to delete native handle %d", ret);
+}
+
+int DrmHwcNativeHandle::CopyBufferHandle(buffer_handle_t handle,
+                                         const gralloc_module_t *gralloc) {
+  native_handle_t *handle_copy = dup_buffer_handle(handle);
+  if (handle_copy == NULL) {
+    ALOGE("Failed to duplicate handle");
+    return -ENOMEM;
+  }
+
+  int ret = gralloc->registerBuffer(gralloc, handle_copy);
+  if (ret) {
+    ALOGE("Failed to register buffer handle %d", ret);
+    free_buffer_handle(handle_copy);
+    return ret;
+  }
+
+  Clear();
+
+  gralloc_ = gralloc;
+  handle_ = handle_copy;
+
+  return 0;
+}
+
+DrmHwcNativeHandle::~DrmHwcNativeHandle() {
+  Clear();
+}
+
+void DrmHwcNativeHandle::Clear() {
+  if (gralloc_ != NULL && handle_ != NULL) {
+    gralloc_->unregisterBuffer(gralloc_, handle_);
+    free_buffer_handle(handle_);
+    gralloc_ = NULL;
+    handle_ = NULL;
+  }
+}
+
+int DrmHwcLayer::InitFromHwcLayer(hwc_layer_1_t *sf_layer, Importer *importer,
+                                  const gralloc_module_t *gralloc) {
+  alpha = sf_layer->planeAlpha;
+
+  SetSourceCrop(sf_layer->sourceCropf);
+  SetDisplayFrame(sf_layer->displayFrame);
+  SetTransform(sf_layer->transform);
+
+  switch (sf_layer->blending) {
+    case HWC_BLENDING_NONE:
+      blending = DrmHwcBlending::kNone;
+      break;
+    case HWC_BLENDING_PREMULT:
+      blending = DrmHwcBlending::kPreMult;
+      break;
+    case HWC_BLENDING_COVERAGE:
+      blending = DrmHwcBlending::kCoverage;
+      break;
+    default:
+      ALOGE("Invalid blending in hwc_layer_1_t %d", sf_layer->blending);
+      return -EINVAL;
+  }
+
+  sf_handle = sf_layer->handle;
+
+  return ImportBuffer(importer, gralloc);
+}
+
+int DrmHwcLayer::ImportBuffer(Importer *importer,
+                              const gralloc_module_t *gralloc) {
+  int ret = buffer.ImportBuffer(sf_handle, importer);
+  if (ret)
+    return ret;
+
+  ret = handle.CopyBufferHandle(sf_handle, gralloc);
+  if (ret)
+    return ret;
+
+  ret = gralloc->perform(gralloc, GRALLOC_MODULE_PERFORM_GET_USAGE,
+                         handle.get(), &gralloc_buffer_usage);
+  if (ret) {
+    ALOGE("Failed to get usage for buffer %p (%d)", handle.get(), ret);
+    return ret;
+  }
+  return 0;
+}
+
+void DrmHwcLayer::SetSourceCrop(hwc_frect_t const &crop) {
+  source_crop = DrmHwcRect<float>(crop.left, crop.top, crop.right, crop.bottom);
+}
+
+void DrmHwcLayer::SetDisplayFrame(hwc_rect_t const &frame) {
+  display_frame =
+      DrmHwcRect<int>(frame.left, frame.top, frame.right, frame.bottom);
+}
+
+void DrmHwcLayer::SetTransform(int32_t sf_transform) {
+  transform = 0;
+  // 270* and 180* cannot be combined with flips. More specifically, they
+  // already contain both horizontal and vertical flips, so those fields are
+  // redundant in this case. 90* rotation can be combined with either horizontal
+  // flip or vertical flip, so treat it differently
+  if (sf_transform == HWC_TRANSFORM_ROT_270) {
+    transform = DrmHwcTransform::kRotate270;
+  } else if (sf_transform == HWC_TRANSFORM_ROT_180) {
+    transform = DrmHwcTransform::kRotate180;
+  } else {
+    if (sf_transform & HWC_TRANSFORM_FLIP_H)
+      transform |= DrmHwcTransform::kFlipH;
+    if (sf_transform & HWC_TRANSFORM_FLIP_V)
+      transform |= DrmHwcTransform::kFlipV;
+    if (sf_transform & HWC_TRANSFORM_ROT_90)
+      transform |= DrmHwcTransform::kRotate90;
+  }
+}
+}