NotForReview: Implement zero/one-copy texture for ozone freon using Intel DRM

ui/ozone/platform/drm/gpu/intel_drm_pixmap.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_OZONE_PLATFORM_DRM_GPU_INTEL_DRM_PIXMAP_H_
+#define UI_OZONE_PLATFORM_DRM_GPU_INTEL_DRM_PIXMAP_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/gfx/buffer_types.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/ozone/public/client_native_pixmap.h"
+#include "ui/ozone/public/native_pixmap.h"
+
+typedef struct _drm_intel_bo drm_intel_bo;
+
+namespace ui {
+
+class IntelDrmPixmap : public NativePixmap {
+ public:
+  static scoped_refptr<IntelDrmPixmap> Create(
+      const base::FileDescriptor& device_fd,
+      gfx::BufferFormat format,
+      const gfx::Size& size);
+
+  // NativePixmap:
+  void* GetEGLClientBuffer() override;
+  int GetDmaBufFd() override;
+  int GetDmaBufPitch() override;
+
+  bool ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
+                            int plane_z_order,
+                            gfx::OverlayTransform plane_transform,
+                            const gfx::Rect& display_bounds,
+                            const gfx::RectF& crop_rect) override;
+  void SetScalingCallback(const ScalingCallback& scaling_callback) override;
+  scoped_refptr<NativePixmap> GetScaledPixmap(gfx::Size new_size) override;
+  gfx::NativePixmapHandle ExportHandle() override;
+
+ private:
+  IntelDrmPixmap();
+  ~IntelDrmPixmap() override;
+
+  bool Initialize(const base::FileDescriptor& device_fd,
+                  gfx::BufferFormat format,
+                  const gfx::Size& size);
+
+  drm_intel_bo* buffer_;
+  base::ScopedFD prime_fd_;
+  uint32 stride_;
+
+  DISALLOW_COPY_AND_ASSIGN(IntelDrmPixmap);
+};
+
+class IntelDrmClientPixmap : public ClientNativePixmap {
+ public:
+  static scoped_ptr<IntelDrmClientPixmap> CreateFromHandle(
+      const gfx::NativePixmapHandle& handle,
+      const base::FileDescriptor& device_fd,
+      gfx::BufferFormat format,
+      const gfx::Size& size);
+  ~IntelDrmClientPixmap() override;
+
+  // CilentNativePixmap:
+  bool Map(void** data) override;
+  void Unmap() override;
+  void GetStride(int* stride) const override;
+
+ private:
+  IntelDrmClientPixmap();
+
+  bool InitializeFromHandle(const gfx::NativePixmapHandle& handle,
+                            const base::FileDescriptor& device_fd,
+                            gfx::BufferFormat format,
+                            const gfx::Size& size);
+
+  drm_intel_bo* buffer_;
+  base::ScopedFD prime_fd_;
+  uint32 stride_;
+
+  DISALLOW_COPY_AND_ASSIGN(IntelDrmClientPixmap);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_INTEL_DRM_PIXMAP_H_