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/minui.h" 21 22 class MinuiBackend { 23 public: 24 // Initializes the backend and returns a GRSurface* to draw into. 25 virtual GRSurface* Init() = 0; 26 27 // Causes the current drawing surface (returned by the most recent call to Flip() or Init()) to 28 // be displayed, and returns a new drawing surface. 29 virtual GRSurface* Flip() = 0; 30 31 // Blank (or unblank) the screen. 32 virtual void Blank(bool) = 0; 33 34 // Device cleanup when drawing is done. ~MinuiBackend()35 virtual ~MinuiBackend() {}; 36 }; 37 38 #endif // _GRAPHICS_H_ 39