1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 * Copyright (C) 2012-2014, The Linux Foundation. All rights reserved.
4 *
5 * Not a Contribution, Apache license notifications and license are retained
6 * 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_COPYBIT_H
21#define HWC_COPYBIT_H
22#include "hwc_utils.h"
23
24#define NUM_RENDER_BUFFERS 3
25//These scaling factors are specific for MDP3. Normally scaling factor
26//is only 4, but copybit will create temp buffer to let it run through
27//twice
28#define MAX_SCALE_FACTOR 16
29#define MIN_SCALE_FACTOR 0.0625
30#define MAX_LAYERS_FOR_ABC 2
31namespace qhwc {
32
33class CopyBit {
34public:
35    CopyBit(hwc_context_t *ctx, const int& dpy);
36    ~CopyBit();
37    // API to get copybit engine(non static)
38    struct copybit_device_t *getCopyBitDevice();
39    //Sets up members and prepares copybit if conditions are met
40    bool prepare(hwc_context_t *ctx, hwc_display_contents_1_t *list,
41                                                                   int dpy);
42    //Draws layer if the layer is set for copybit in prepare
43    bool draw(hwc_context_t *ctx, hwc_display_contents_1_t *list,
44                                                        int dpy, int* fd);
45    // resets the values
46    void reset();
47
48    private_handle_t * getCurrentRenderBuffer();
49
50    void setReleaseFd(int fd);
51
52    void setReleaseFdSync(int fd);
53
54    bool prepareOverlap(hwc_context_t *ctx, hwc_display_contents_1_t *list);
55
56    int drawOverlap(hwc_context_t *ctx, hwc_display_contents_1_t *list);
57
58private:
59    /* cached data */
60    struct LayerCache {
61      int layerCount;
62      buffer_handle_t hnd[MAX_NUM_APP_LAYERS];
63      /* c'tor */
64      LayerCache();
65      /* clear caching info*/
66      void reset();
67      void updateCounts(hwc_context_t *ctx, hwc_display_contents_1_t *list,
68              int dpy);
69    };
70    /* framebuffer cache*/
71    struct FbCache {
72      hwc_rect_t  FbdirtyRect[NUM_RENDER_BUFFERS];
73      int FbIndex;
74      FbCache();
75      void reset();
76      void insertAndUpdateFbCache(hwc_rect_t dirtyRect);
77      int getUnchangedFbDRCount(hwc_rect_t dirtyRect);
78    };
79
80    // holds the copybit device
81    struct copybit_device_t *mEngine;
82    bool drawUsingAppBufferComposition(hwc_context_t *ctx,
83                                hwc_display_contents_1_t *list,
84                                int dpy, int *fd);
85    // Helper functions for copybit composition
86    int  drawLayerUsingCopybit(hwc_context_t *dev, hwc_layer_1_t *layer,
87                          private_handle_t *renderBuffer, bool isFG);
88    // Helper function to draw copybit layer for PTOR comp
89    int drawRectUsingCopybit(hwc_context_t *dev, hwc_layer_1_t *layer,
90                          private_handle_t *renderBuffer, hwc_rect_t overlap,
91                          hwc_rect_t destRect);
92    int fillColorUsingCopybit(hwc_layer_1_t *layer,
93                          private_handle_t *renderBuffer);
94    bool canUseCopybitForYUV (hwc_context_t *ctx);
95    bool canUseCopybitForRGB (hwc_context_t *ctx,
96                                     hwc_display_contents_1_t *list, int dpy);
97    bool validateParams (hwc_context_t *ctx,
98                                const hwc_display_contents_1_t *list);
99    //Flags if this feature is on.
100    bool mIsModeOn;
101    // flag that indicates whether CopyBit composition is enabled for this cycle
102    bool mCopyBitDraw;
103
104    unsigned int getRGBRenderingArea
105                            (const hwc_display_contents_1_t *list);
106
107    void getLayerResolution(const hwc_layer_1_t* layer,
108                                   unsigned int &width, unsigned int& height);
109
110    int allocRenderBuffers(int w, int h, int f);
111
112    void freeRenderBuffers();
113
114    int clear (private_handle_t* hnd, hwc_rect_t& rect);
115
116    private_handle_t* mRenderBuffer[NUM_RENDER_BUFFERS];
117
118    // Index of the current intermediate render buffer
119    int mCurRenderBufferIndex;
120
121    // Release FDs of the intermediate render buffer
122    int mRelFd[NUM_RENDER_BUFFERS];
123
124    //Dynamic composition threshold for deciding copybit usage.
125    double mDynThreshold;
126    bool mSwapRectEnable;
127    int mAlignedWidth;
128    int mAlignedHeight;
129    int mDirtyLayerIndex;
130    LayerCache mLayerCache;
131    FbCache mFbCache;
132    int getLayersChanging(hwc_context_t *ctx, hwc_display_contents_1_t *list,
133                  int dpy);
134    int checkDirtyRect(hwc_context_t *ctx, hwc_display_contents_1_t *list,
135                  int dpy);
136};
137
138}; //namespace qhwc
139
140#endif //HWC_COPYBIT_H
141