1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef _GRAPHICS_DRM_H_
18 #define _GRAPHICS_DRM_H_
19 
20 #include <stdint.h>
21 
22 #include <xf86drmMode.h>
23 
24 #include "graphics.h"
25 #include "minui/minui.h"
26 
27 class GRSurfaceDrm : public GRSurface {
28  private:
29   uint32_t fb_id;
30   uint32_t handle;
31 
32   friend class MinuiBackendDrm;
33 };
34 
35 class MinuiBackendDrm : public MinuiBackend {
36  public:
37   GRSurface* Init() override;
38   GRSurface* Flip() override;
39   void Blank(bool) override;
40   ~MinuiBackendDrm() override;
41   MinuiBackendDrm();
42 
43  private:
44   void DrmDisableCrtc(int drm_fd, drmModeCrtc* crtc);
45   void DrmEnableCrtc(int drm_fd, drmModeCrtc* crtc, GRSurfaceDrm* surface);
46   GRSurfaceDrm* DrmCreateSurface(int width, int height);
47   void DrmDestroySurface(GRSurfaceDrm* surface);
48   void DisableNonMainCrtcs(int fd, drmModeRes* resources, drmModeCrtc* main_crtc);
49   drmModeConnector* FindMainMonitor(int fd, drmModeRes* resources, uint32_t* mode_index);
50 
51   GRSurfaceDrm* GRSurfaceDrms[2];
52   int current_buffer;
53   drmModeCrtc* main_monitor_crtc;
54   drmModeConnector* main_monitor_connector;
55   int drm_fd;
56 };
57 
58 #endif  // _GRAPHICS_DRM_H_
59