Support removal of DRI platform

ui/gfx/ozone/impl/dri_wrapper.h

-// Copyright 2013 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_GFX_OZONE_IMPL_DRI_WRAPPER_H_
-#define UI_GFX_OZONE_IMPL_DRI_WRAPPER_H_
-
-#include <stdint.h>
-
-#include "base/basictypes.h"
-
-typedef struct _drmModeCrtc drmModeCrtc;
-typedef struct _drmModeModeInfo drmModeModeInfo;
-
-namespace gfx {
-
-// Wraps DRM calls into a nice interface. Used to provide different
-// implementations of the DRM calls. For the actual implementation the DRM API
-// would be called. In unit tests this interface would be stubbed.
-class DriWrapper {
- public:
-  DriWrapper(const char* device_path);
-  virtual ~DriWrapper();
-
-  // Get the CRTC state. This is generally used to save state before using the
-  // CRTC. When the user finishes using the CRTC, the user should restore the
-  // CRTC to it's initial state. Use |SetCrtc| to restore the state.
-  virtual drmModeCrtc* GetCrtc(uint32_t crtc_id);
-
-  // Frees the CRTC mode object.
-  virtual void FreeCrtc(drmModeCrtc* crtc);
-
-  // Used to configure CRTC with ID |crtc_id| to use the connector in
-  // |connectors|. The CRTC will be configured with mode |mode| and will display
-  // the framebuffer with ID |framebuffer|. Before being able to display the
-  // framebuffer, it should be registered with the CRTC using |AddFramebuffer|.
-  virtual bool SetCrtc(uint32_t crtc_id,
-                       uint32_t framebuffer,
-                       uint32_t* connectors,
-                       drmModeModeInfo* mode);
-
-  // Used to set a specific configuration to the CRTC. Normally this function
-  // would be called with a CRTC saved state (from |GetCrtc|) to restore it to
-  // its original configuration.
-  virtual bool SetCrtc(drmModeCrtc* crtc, uint32_t* connectors);
-
-  // Register a buffer with the CRTC. On successful registration, the CRTC will
-  // assign a framebuffer ID to |framebuffer|.
-  virtual bool AddFramebuffer(const drmModeModeInfo& mode,
-                              uint8_t depth,
-                              uint8_t bpp,
-                              uint32_t stride,
-                              uint32_t handle,
-                              uint32_t* framebuffer);
-
-  // Deregister the given |framebuffer|.
-  virtual bool RemoveFramebuffer(uint32_t framebuffer);
-
-  // Schedules a pageflip for CRTC |crtc_id|. This function will return
-  // immediately. Upon completion of the pageflip event, the CRTC will be
-  // displaying the buffer with ID |framebuffer| and will have a DRM event
-  // queued on |fd_|. |data| is a generic pointer to some information the user
-  // will receive when processing the pageflip event.
-  virtual bool PageFlip(uint32_t crtc_id, uint32_t framebuffer, void* data);
-
-  // Sets the value of property with ID |property_id| to |value|. The property
-  // is applied to the connector with ID |connector_id|.
-  virtual bool ConnectorSetProperty(uint32_t connector_id,
-                                    uint32_t property_id,
-                                    uint64_t value);
-
-  int get_fd() const { return fd_; }
-
- protected:
-  // The file descriptor associated with this wrapper. All DRM operations will
-  // be performed using this FD.
-  int fd_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(DriWrapper);
-};
-
-}  // namespace gfx
-
-#endif  // UI_GFX_OZONE_IMPL_DRI_WRAPPER_H_