1 files changed, 127 insertions, 0 deletions
diff --git a/chromium/ui/ozone/platform/dri/dri_wrapper.h b/chromium/ui/ozone/platform/dri/dri_wrapper.h
new file mode 100644
index 00000000000..014d143ec57
--- /dev/null
+++ b/chromium/ui/ozone/platform/dri/dri_wrapper.h
@@ -0,0 +1,127 @@
+// Copyright 2014 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_DRI_DRI_WRAPPER_H_
+#define UI_OZONE_PLATFORM_DRI_DRI_WRAPPER_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "ui/ozone/ozone_export.h"
+
+typedef struct _drmEventContext drmEventContext;
+typedef struct _drmModeConnector drmModeConnector;
+typedef struct _drmModeCrtc drmModeCrtc;
+typedef struct _drmModeModeInfo drmModeModeInfo;
+typedef struct _drmModeProperty drmModePropertyRes;
+typedef struct _drmModePropertyBlob drmModePropertyBlobRes;
+
+namespace ui {
+
+// 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 OZONE_EXPORT 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);
+
+  virtual bool DisableCrtc(uint32_t crtc_id);
+
+  // Register a buffer with the CRTC. On successful registration, the CRTC will
+  // assign a framebuffer ID to |framebuffer|.
+  virtual bool AddFramebuffer(uint32_t width,
+                              uint32_t height,
+                              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);
+
+  // Returns the property with name |name| associated with |connector|. Returns
+  // NULL if property not found. If the returned value is valid, it must be
+  // released using FreeProperty().
+  virtual drmModePropertyRes* GetProperty(drmModeConnector* connector,
+                                          const char* name);
+
+  // Sets the value of property with ID |property_id| to |value|. The property
+  // is applied to the connector with ID |connector_id|.
+  virtual bool SetProperty(uint32_t connector_id,
+                           uint32_t property_id,
+                           uint64_t value);
+
+  // Frees |prop| and any resources it allocated when it was created. |prop|
+  // must be a valid object.
+  virtual void FreeProperty(drmModePropertyRes* prop);
+
+  // Return a binary blob associated with |connector|. The binary blob is
+  // associated with the property with name |name|. Return NULL if the property
+  // could not be found or if the property does not have a binary blob. If valid
+  // the returned object must be freed using FreePropertyBlob().
+  virtual drmModePropertyBlobRes* GetPropertyBlob(drmModeConnector* connector,
+                                                  const char* name);
+
+  // Frees |blob| and any resources allocated when it was created. |blob| must
+  // be a valid object.
+  virtual void FreePropertyBlob(drmModePropertyBlobRes* blob);
+
+  // Set the cursor to be displayed in CRTC |crtc_id|. (width, height) is the
+  // cursor size pointed by |handle|.
+  virtual bool SetCursor(uint32_t crtc_id,
+                         uint32_t handle,
+                         uint32_t width,
+                         uint32_t height);
+
+
+  // Move the cursor on CRTC |crtc_id| to (x, y);
+  virtual bool MoveCursor(uint32_t crtc_id, int x, int y);
+
+  virtual void HandleEvent(drmEventContext& event);
+
+  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 ui
+
+#endif  // UI_OZONE_PLATFORM_DRI_DRI_WRAPPER_H_