hwc_fbupdate.h revision 513ddc2124abf90c63af41999201f0d2031af0c8 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 * Copyright (C) 2012, The Linux Foundation. All rights reserved.
4 *
5 * Not a Contribution, Apache license notifications and license are
6 * retained for attribution purposes only.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 *      http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20#ifndef HWC_FBUPDATE_H
21#define HWC_FBUPDATE_H
22#include "hwc_utils.h"
23#include "overlay.h"
24
25#define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
26#define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))
27
28namespace qhwc {
29namespace ovutils = overlay::utils;
30
31//Framebuffer update Interface
32class IFBUpdate {
33public:
34    explicit IFBUpdate(const int& dpy) : mDpy(dpy) {}
35    virtual ~IFBUpdate() {};
36    // Sets up members and prepares overlay if conditions are met
37    virtual bool prepare(hwc_context_t *ctx, hwc_display_contents_1 *list,
38                                                       int fbZorder) = 0;
39    // Draws layer
40    virtual bool draw(hwc_context_t *ctx, private_handle_t *hnd) = 0;
41    //Reset values
42    virtual void reset();
43    //Factory method that returns a low-res or high-res version
44    static IFBUpdate *getObject(const int& width, const int& dpy);
45
46protected:
47    const int mDpy; // display to update
48    bool mModeOn; // if prepare happened
49};
50
51//Low resolution (<= 2048) panel handler.
52class FBUpdateLowRes : public IFBUpdate {
53public:
54    explicit FBUpdateLowRes(const int& dpy);
55    virtual ~FBUpdateLowRes() {};
56    bool prepare(hwc_context_t *ctx, hwc_display_contents_1 *list,
57                                                          int fbZorder);
58    bool draw(hwc_context_t *ctx, private_handle_t *hnd);
59    void reset();
60private:
61    bool configure(hwc_context_t *ctx, hwc_display_contents_1 *list,
62                                                               int fbZorder);
63    ovutils::eDest mDest; //pipe to draw on
64};
65
66//High resolution (> 2048) panel handler.
67class FBUpdateHighRes : public IFBUpdate {
68public:
69    explicit FBUpdateHighRes(const int& dpy);
70    virtual ~FBUpdateHighRes() {};
71    bool prepare(hwc_context_t *ctx, hwc_display_contents_1 *list,
72                                                             int fbZorder);
73    bool draw(hwc_context_t *ctx, private_handle_t *hnd);
74    void reset();
75private:
76    bool configure(hwc_context_t *ctx, hwc_display_contents_1 *list,
77                                                            int fbZorder);
78    ovutils::eDest mDestLeft; //left pipe to draw on
79    ovutils::eDest mDestRight; //right pipe to draw on
80};
81
82}; //namespace qhwc
83
84#endif //HWC_FBUPDATE_H
85