1 /*
2  * Copyright (C) 2014 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_H_
18 #define _GRAPHICS_H_
19 
20 #include "minui.h"
21 
22 // TODO: lose the function pointers.
23 struct minui_backend {
24     // Initializes the backend and returns a GRSurface* to draw into.
25     GRSurface* (*init)(minui_backend*);
26 
27     // Causes the current drawing surface (returned by the most recent
28     // call to flip() or init()) to be displayed, and returns a new
29     // drawing surface.
30     GRSurface* (*flip)(minui_backend*);
31 
32     // Blank (or unblank) the screen.
33     void (*blank)(minui_backend*, bool);
34 
35     // Device cleanup when drawing is done.
36     void (*exit)(minui_backend*);
37 };
38 
39 minui_backend* open_fbdev();
40 minui_backend* open_adf();
41 minui_backend* open_drm();
42 
43 #endif
44