1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 * Copyright (C) 2012, Code Aurora Forum. All rights reserved.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 *      http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17#ifndef HWC_EXTONLY_H
18#define HWC_EXTONLY_H
19
20#include <overlay.h>
21#include "hwc_utils.h"
22
23#define LIKELY( exp )       (__builtin_expect( (exp) != 0, true  ))
24#define UNLIKELY( exp )     (__builtin_expect( (exp) != 0, false ))
25
26namespace qhwc {
27//Feature for using overlay to display external-only layers on HDTV
28class ExtOnly {
29public:
30    //Sets up members and prepares overlay if conditions are met
31    static bool prepare(hwc_context_t *ctx, hwc_display_contents_1_t *list);
32    //Draws layer if this feature is on
33    static bool draw(hwc_context_t *ctx, hwc_display_contents_1_t *list);
34    //Receives data from hwc
35    static void setStats(int extCount, int extIndex, bool isExtBlock);
36    //resets values
37    static void reset();
38private:
39    //Choose an appropriate overlay state based on conditions
40    static void chooseState(hwc_context_t *ctx);
41    //Configures overlay
42    static bool configure(hwc_context_t *ctx, hwc_layer_1_t *layer);
43    //Marks layer flags if this feature is used
44    static void markFlags(hwc_layer_1_t *layer);
45    //returns ext-only count
46    static int getExtCount();
47
48    //The chosen overlay state.
49    static ovutils::eOverlayState sState;
50    //Number of ext-only layers in this drawing round. Used for stats/debugging.
51    //This does not reflect the closed caption layer count even though its
52    //ext-only.
53    static int sExtCount;
54    //Index of ext-only layer. If there are 2 such layers with 1 marked as BLOCK
55    //then this will hold the index of BLOCK layer.
56    static int sExtIndex;
57    //Flags if ext-only layer is BLOCK, which means only this layer (sExtIndex)
58    //is displayed even if other ext-only layers are present to block their
59    //content. This is used for stats / debugging only.
60    static bool sIsExtBlock;
61    //Flags if this feature is on.
62    static bool sIsModeOn;
63};
64
65inline void ExtOnly::setStats(int extCount, int extIndex, bool isExtBlock) {
66    sExtCount = extCount;
67    sExtIndex = extIndex;
68    sIsExtBlock = isExtBlock;
69}
70
71inline int ExtOnly::getExtCount() { return sExtCount; }
72inline void ExtOnly::reset() {
73    sExtCount = 0;
74    sExtIndex = -1;
75    sIsExtBlock = false;
76    sIsModeOn = false;
77    sState = ovutils::OV_CLOSED;
78}
79
80}; //namespace qhwc
81
82#endif //HWC_EXTONLY_H
83