1 files changed, 127 insertions, 0 deletions
diff --git a/drmdisplaycompositor.h b/drmdisplaycompositor.h
new file mode 100644
index 0000000..1005598
--- /dev/null
+++ b/drmdisplaycompositor.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2015 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_DRM_DISPLAY_COMPOSITOR_H_
+#define ANDROID_DRM_DISPLAY_COMPOSITOR_H_
+
+#include "drmdisplaycomposition.h"
+#include "drmframebuffer.h"
+#include "drmhwcomposer.h"
+#include "resourcemanager.h"
+#include "vsyncworker.h"
+
+#include <pthread.h>
+#include <memory>
+#include <sstream>
+#include <tuple>
+
+#include <hardware/hardware.h>
+#include <hardware/hwcomposer.h>
+
+// One for the front, one for the back, and one for cases where we need to
+// squash a frame that the hw can't display with hw overlays.
+#define DRM_DISPLAY_BUFFERS 3
+
+// If a scene is still for this number of vblanks flatten it to reduce power
+// consumption.
+#define FLATTEN_COUNTDOWN_INIT 60
+
+namespace android {
+
+class DrmDisplayCompositor {
+ public:
+  DrmDisplayCompositor();
+  ~DrmDisplayCompositor();
+
+  int Init(ResourceManager *resource_manager, int display);
+
+  std::unique_ptr<DrmDisplayComposition> CreateComposition() const;
+  std::unique_ptr<DrmDisplayComposition> CreateInitializedComposition() const;
+  int ApplyComposition(std::unique_ptr<DrmDisplayComposition> composition);
+  int TestComposition(DrmDisplayComposition *composition);
+  int Composite();
+  void Dump(std::ostringstream *out) const;
+  void Vsync(int display, int64_t timestamp);
+  void ClearDisplay();
+
+  std::tuple<uint32_t, uint32_t, int> GetActiveModeResolution();
+
+ private:
+  struct ModeState {
+    bool needs_modeset = false;
+    DrmMode mode;
+    uint32_t blob_id = 0;
+    uint32_t old_blob_id = 0;
+  };
+
+  DrmDisplayCompositor(const DrmDisplayCompositor &) = delete;
+
+  // We'll wait for acquire fences to fire for kAcquireWaitTimeoutMs,
+  // kAcquireWaitTries times, logging a warning in between.
+  static const int kAcquireWaitTries = 5;
+  static const int kAcquireWaitTimeoutMs = 100;
+
+  int CommitFrame(DrmDisplayComposition *display_comp, bool test_only,
+                  DrmConnector *writeback_conn = NULL,
+                  DrmHwcBuffer *writeback_buffer = NULL);
+  int SetupWritebackCommit(drmModeAtomicReqPtr pset, uint32_t crtc_id,
+                           DrmConnector *writeback_conn,
+                           DrmHwcBuffer *writeback_buffer);
+  int ApplyDpms(DrmDisplayComposition *display_comp);
+  int DisablePlanes(DrmDisplayComposition *display_comp);
+
+  void ApplyFrame(std::unique_ptr<DrmDisplayComposition> composition,
+                  int status, bool writeback = false);
+  int FlattenActiveComposition();
+  int FlattenSerial(DrmConnector *writeback_conn);
+  int FlattenConcurrent(DrmConnector *writeback_conn);
+  int FlattenOnDisplay(std::unique_ptr<DrmDisplayComposition> &src,
+                       DrmConnector *writeback_conn, DrmMode &src_mode,
+                       DrmHwcLayer *writeback_layer);
+
+  bool CountdownExpired() const;
+
+  std::tuple<int, uint32_t> CreateModeBlob(const DrmMode &mode);
+
+  ResourceManager *resource_manager_;
+  int display_;
+
+  std::unique_ptr<DrmDisplayComposition> active_composition_;
+
+  bool initialized_;
+  bool active_;
+  bool use_hw_overlays_;
+
+  ModeState mode_;
+
+  int framebuffer_index_;
+  DrmFramebuffer framebuffers_[DRM_DISPLAY_BUFFERS];
+
+  // mutable since we need to acquire in Dump()
+  mutable pthread_mutex_t lock_;
+
+  // State tracking progress since our last Dump(). These are mutable since
+  // we need to reset them on every Dump() call.
+  mutable uint64_t dump_frames_composited_;
+  mutable uint64_t dump_last_timestamp_ns_;
+  VSyncWorker vsync_worker_;
+  int64_t flatten_countdown_;
+  std::unique_ptr<Planner> planner_;
+  int writeback_fence_;
+};
+}  // namespace android
+
+#endif  // ANDROID_DRM_DISPLAY_COMPOSITOR_H_