1 files changed, 73 insertions, 0 deletions
diff --git a/drm/DrmGenericImporter.h b/drm/DrmGenericImporter.h
new file mode 100644
index 0000000..ca53762
--- /dev/null
+++ b/drm/DrmGenericImporter.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#ifndef ANDROID_PLATFORM_DRM_GENERIC_H_
+#define ANDROID_PLATFORM_DRM_GENERIC_H_
+
+#include <drm/drm_fourcc.h>
+#include <hardware/gralloc.h>
+
+#include <map>
+
+#include "drm/DrmDevice.h"
+#include "drmhwcgralloc.h"
+
+#ifndef DRM_FORMAT_INVALID
+#define DRM_FORMAT_INVALID 0
+#endif
+
+namespace android {
+
+class Importer {
+ public:
+  virtual ~Importer() {
+  }
+
+  // Imports the buffer referred to by handle into bo.
+  //
+  // Note: This can be called from a different thread than ReleaseBuffer. The
+  //       implementation is responsible for ensuring thread safety.
+  virtual int ImportBuffer(hwc_drm_bo_t *bo) = 0;
+
+  // Releases the buffer object (ie: does the inverse of ImportBuffer)
+  //
+  // Note: This can be called from a different thread than ImportBuffer. The
+  //       implementation is responsible for ensuring thread safety.
+  virtual int ReleaseBuffer(hwc_drm_bo_t *bo) = 0;
+};
+
+class DrmGenericImporter : public Importer {
+ public:
+  DrmGenericImporter(DrmDevice *drm);
+  ~DrmGenericImporter() override;
+
+  int ImportBuffer(hwc_drm_bo_t *bo) override;
+  int ReleaseBuffer(hwc_drm_bo_t *bo) override;
+  int ImportHandle(uint32_t gem_handle);
+  int ReleaseHandle(uint32_t gem_handle);
+
+ protected:
+  DrmDevice *drm_;
+
+ private:
+  int CloseHandle(uint32_t gem_handle);
+  std::map<uint32_t, int> gem_refcount_;
+  bool has_modifier_support_;
+};
+
+}  // namespace android
+
+#endif