1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_GFX_OZONE_DRI_DRI_WRAPPER_H_ 6 #define UI_GFX_OZONE_DRI_DRI_WRAPPER_H_ 7 8 #include <stdint.h> 9 10 #include "base/basictypes.h" 11 #include "ui/gfx/gfx_export.h" 12 13 typedef struct _drmModeCrtc drmModeCrtc; 14 typedef struct _drmModeModeInfo drmModeModeInfo; 15 16 namespace gfx { 17 18 // Wraps DRM calls into a nice interface. Used to provide different 19 // implementations of the DRM calls. For the actual implementation the DRM API 20 // would be called. In unit tests this interface would be stubbed. 21 class GFX_EXPORT DriWrapper { 22 public: 23 DriWrapper(const char* device_path); 24 virtual ~DriWrapper(); 25 26 // Get the CRTC state. This is generally used to save state before using the 27 // CRTC. When the user finishes using the CRTC, the user should restore the 28 // CRTC to it's initial state. Use |SetCrtc| to restore the state. 29 virtual drmModeCrtc* GetCrtc(uint32_t crtc_id); 30 31 // Frees the CRTC mode object. 32 virtual void FreeCrtc(drmModeCrtc* crtc); 33 34 // Used to configure CRTC with ID |crtc_id| to use the connector in 35 // |connectors|. The CRTC will be configured with mode |mode| and will display 36 // the framebuffer with ID |framebuffer|. Before being able to display the 37 // framebuffer, it should be registered with the CRTC using |AddFramebuffer|. 38 virtual bool SetCrtc(uint32_t crtc_id, 39 uint32_t framebuffer, 40 uint32_t* connectors, 41 drmModeModeInfo* mode); 42 43 // Used to set a specific configuration to the CRTC. Normally this function 44 // would be called with a CRTC saved state (from |GetCrtc|) to restore it to 45 // its original configuration. 46 virtual bool SetCrtc(drmModeCrtc* crtc, uint32_t* connectors); 47 48 // Register a buffer with the CRTC. On successful registration, the CRTC will 49 // assign a framebuffer ID to |framebuffer|. 50 virtual bool AddFramebuffer(const drmModeModeInfo& mode, 51 uint8_t depth, 52 uint8_t bpp, 53 uint32_t stride, 54 uint32_t handle, 55 uint32_t* framebuffer); 56 57 // Deregister the given |framebuffer|. 58 virtual bool RemoveFramebuffer(uint32_t framebuffer); 59 60 // Schedules a pageflip for CRTC |crtc_id|. This function will return 61 // immediately. Upon completion of the pageflip event, the CRTC will be 62 // displaying the buffer with ID |framebuffer| and will have a DRM event 63 // queued on |fd_|. |data| is a generic pointer to some information the user 64 // will receive when processing the pageflip event. 65 virtual bool PageFlip(uint32_t crtc_id, uint32_t framebuffer, void* data); 66 67 // Sets the value of property with ID |property_id| to |value|. The property 68 // is applied to the connector with ID |connector_id|. 69 virtual bool ConnectorSetProperty(uint32_t connector_id, 70 uint32_t property_id, 71 uint64_t value); 72 73 int get_fd() const { return fd_; } 74 75 protected: 76 // The file descriptor associated with this wrapper. All DRM operations will 77 // be performed using this FD. 78 int fd_; 79 80 private: 81 DISALLOW_COPY_AND_ASSIGN(DriWrapper); 82 }; 83 84 } // namespace gfx 85 86 #endif // UI_GFX_OZONE_DRI_DRI_WRAPPER_H_ 87
