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      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 
     30 namespace android {
     31 // ---------------------------------------------------------------------------
     32 
     33 class String8;
     34 class SurfaceFlinger;
     35 class LayerBase;
     36 
     37 class HWComposer
     38 {
     39 public:
     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 
     74 private:
     75     struct cb_context {
     76         hwc_procs_t procs;
     77         HWComposer* hwc;
     78     };
     79     static void hook_invalidate(struct hwc_procs* procs);
     80     void invalidate();
     81 
     82     sp<SurfaceFlinger>      mFlinger;
     83     hw_module_t const*      mModule;
     84     hwc_composer_device_t*  mHwc;
     85     hwc_layer_list_t*       mList;
     86     size_t                  mCapacity;
     87     mutable size_t          mNumOVLayers;
     88     mutable size_t          mNumFBLayers;
     89     hwc_display_t           mDpy;
     90     hwc_surface_t           mSur;
     91     cb_context              mCBContext;
     92 };
     93 
     94 
     95 // ---------------------------------------------------------------------------
     96 }; // namespace android
     97 
     98 #endif // ANDROID_SF_HWCOMPOSER_H
     99