HWComposer.h revision 31d2843b45ebdb69ec3355111b7567363fd2a6b7 
1/*
2 * Copyright (C) 2010 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 ANDROID_SF_HWCOMPOSER_H
18#define ANDROID_SF_HWCOMPOSER_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <EGL/egl.h>
24
25#include <hardware/hwcomposer.h>
26
27#include <utils/StrongPointer.h>
28#include <utils/Vector.h>
29
30namespace android {
31// ---------------------------------------------------------------------------
32
33class String8;
34class SurfaceFlinger;
35class LayerBase;
36
37class HWComposer
38{
39public:
40
41    HWComposer(const sp<SurfaceFlinger>& flinger);
42    ~HWComposer();
43
44    status_t initCheck() const;
45
46    // tells the HAL what the framebuffer is
47    void setFrameBuffer(EGLDisplay dpy, EGLSurface sur);
48
49    // create a work list for numLayers layer
50    status_t createWorkList(size_t numLayers);
51
52    // Asks the HAL what it can do
53    status_t prepare() const;
54
55    // disable hwc until next createWorkList
56    status_t disable();
57
58    // commits the list
59    status_t commit() const;
60
61    // release hardware resources
62    status_t release() const;
63
64    size_t getNumLayers() const;
65    hwc_layer_t* getLayers() const;
66
67    // updated in preapre()
68    size_t getLayerCount(int type) const;
69
70    // for debugging
71    void dump(String8& out, char* scratch, size_t SIZE,
72            const Vector< sp<LayerBase> >& visibleLayersSortedByZ) const;
73
74private:
75
76    struct callbacks : public hwc_procs_t {
77        // these are here to facilitate the transition when adding
78        // new callbacks (an implementation can check for NULL before
79        // calling a new callback).
80        void (*zero[4])(void);
81    };
82
83    struct cb_context {
84        callbacks procs;
85        HWComposer* hwc;
86    };
87
88    static void hook_invalidate(struct hwc_procs* procs);
89    static void hook_vsync(struct hwc_procs* procs, int dpy, int64_t timestamp);
90
91    void invalidate();
92    void vsync(int dpy, int64_t timestamp);
93
94    sp<SurfaceFlinger>      mFlinger;
95    hw_module_t const*      mModule;
96    hwc_composer_device_t*  mHwc;
97    hwc_layer_list_t*       mList;
98    size_t                  mCapacity;
99    mutable size_t          mNumOVLayers;
100    mutable size_t          mNumFBLayers;
101    hwc_display_t           mDpy;
102    hwc_surface_t           mSur;
103    cb_context              mCBContext;
104};
105
106
107// ---------------------------------------------------------------------------
108}; // namespace android
109
110#endif // ANDROID_SF_HWCOMPOSER_H
111