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      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_BLUR_H
     18 #define ANDROID_LAYER_BLUR_H
     19 
     20 #include <stdint.h>
     21 #include <sys/types.h>
     22 
     23 #include <ui/Region.h>
     24 
     25 #include "LayerBase.h"
     26 
     27 namespace android {
     28 
     29 // ---------------------------------------------------------------------------
     30 
     31 class LayerBlur : public LayerBaseClient
     32 {
     33 public:
     34                 LayerBlur(SurfaceFlinger* flinger, DisplayID display,
     35                         const sp<Client>& client);
     36         virtual ~LayerBlur();
     37 
     38     virtual void onDraw(const Region& clip) const;
     39     virtual bool needsBlending() const  { return true; }
     40     virtual bool isSecure() const       { return false; }
     41     virtual const char* getTypeId() const { return "LayerBlur"; }
     42 
     43     virtual uint32_t doTransaction(uint32_t flags);
     44     virtual void setVisibleRegion(const Region& visibleRegion);
     45     virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
     46 
     47 private:
     48             bool    mCacheDirty;
     49     mutable bool    mRefreshCache;
     50     mutable bool    mAutoRefreshPending;
     51             nsecs_t mCacheAge;
     52     mutable GLuint  mTextureName;
     53     mutable GLfloat mWidthScale;
     54     mutable GLfloat mHeightScale;
     55     mutable GLfloat mYOffset;
     56     mutable GLint   mReadFormat;
     57     mutable GLint   mReadType;
     58     mutable uint32_t mBlurFormat;
     59 };
     60 
     61 // ---------------------------------------------------------------------------
     62 
     63 }; // namespace android
     64 
     65 #endif // ANDROID_LAYER_BLUR_H
     66