Layer.h revision ddc31c3e2bc6ffe66695c385d23e8ccc3c6dad06 
1/*
2 * Copyright (C) 2007 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_LAYER_H
18#define ANDROID_LAYER_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <gui/SurfaceTexture.h>
24
25#include <pixelflinger/pixelflinger.h>
26#include <ui/GraphicBuffer.h>
27#include <ui/PixelFormat.h>
28
29#include <EGL/egl.h>
30#include <EGL/eglext.h>
31#include <GLES/gl.h>
32#include <GLES/glext.h>
33
34#include "LayerBase.h"
35#include "SurfaceTextureLayer.h"
36#include "Transform.h"
37
38namespace android {
39
40// ---------------------------------------------------------------------------
41
42class FreezeLock;
43class Client;
44class GLExtensions;
45
46// ---------------------------------------------------------------------------
47
48class Layer : public LayerBaseClient, private RefBase::Destroyer
49{
50public:
51            Layer(SurfaceFlinger* flinger, DisplayID display,
52                    const sp<Client>& client);
53
54    virtual ~Layer();
55
56    virtual const char* getTypeId() const { return "Layer"; }
57
58    // the this layer's size and format
59    status_t setBuffers(uint32_t w, uint32_t h,
60            PixelFormat format, uint32_t flags=0);
61
62    // Set this Layer's buffers size
63    bool isFixedSize() const;
64
65    // LayerBase interface
66    virtual void setGeometry(hwc_layer_t* hwcl);
67    virtual void setPerFrameData(hwc_layer_t* hwcl);
68    virtual void onDraw(const Region& clip) const;
69    virtual uint32_t doTransaction(uint32_t transactionFlags);
70    virtual void lockPageFlip(bool& recomputeVisibleRegions);
71    virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
72    virtual bool isOpaque() const;
73    virtual bool needsDithering() const     { return mNeedsDithering; }
74    virtual bool isSecure() const           { return mSecure; }
75    virtual bool isProtected() const;
76    virtual void onRemoved();
77
78    // only for debugging
79    inline const sp<FreezeLock>&  getFreezeLock() const { return mFreezeLock; }
80
81protected:
82    virtual void destroy(RefBase const* base);
83    virtual void onFirstRef();
84    virtual void dump(String8& result, char* scratch, size_t size) const;
85
86private:
87    friend class SurfaceTextureLayer;
88    void onFrameQueued();
89    virtual sp<ISurface> createSurface();
90    uint32_t getEffectiveUsage(uint32_t usage) const;
91    void setFixedSize(bool fixedSize);
92    bool isCropped() const;
93    static bool getOpacityForFormat(uint32_t format);
94
95    // -----------------------------------------------------------------------
96
97    // constants
98    sp<SurfaceTextureLayer> mSurfaceTexture;
99    GLuint mTextureName;
100
101    // thread-safe
102    volatile int32_t mQueuedFrames;
103
104    // main thread
105    sp<GraphicBuffer> mActiveBuffer;
106    GLfloat mTextureMatrix[16];
107    Rect mCurrentCrop;
108    uint32_t mCurrentTransform;
109    bool mCurrentOpacity;
110
111    // constants
112    PixelFormat mFormat;
113    const GLExtensions& mGLExtensions;
114    bool mOpaqueLayer;
115    bool mNeedsDithering;
116
117    // page-flip thread (currently main thread)
118    bool mSecure;         // no screenshots
119    bool mProtectedByApp; // application requires protected path to external sink
120    Region mPostedDirtyRegion;
121
122    // page-flip thread and transaction thread (currently main thread)
123    sp<FreezeLock>  mFreezeLock;
124
125    // binder thread, transaction thread
126    mutable Mutex mLock;
127    bool mFixedSize;
128};
129
130// ---------------------------------------------------------------------------
131
132}; // namespace android
133
134#endif // ANDROID_LAYER_H
135