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/*
* Copyright (c) 2014, The Linux Foundation. All rights reserved.
* Not a Contribution.
*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_LAYER_BLUR_H
#define ANDROID_LAYER_BLUR_H
#include <stdlib.h>
#include <stdint.h>
#include <sys/types.h>
#include "Layer.h"
// ---------------------------------------------------------------------------
namespace android {
/**
* Blur layer object.
* Actual blurring logics are capsulated in libuiblur.so
*/
class LayerBlur : public Layer
{
public:
LayerBlur(SurfaceFlinger* flinger, const sp<Client>& client,
const String8& name, uint32_t w, uint32_t h, uint32_t flags);
virtual ~LayerBlur();
virtual const char* getTypeId() const { return "LayerBlur"; }
virtual void onDraw(const sp<const DisplayDevice>& hw, const Region& clip,
bool useIdentityTransform);
virtual bool isOpaque(const Layer::State& /*s*/) const { return false; }
virtual bool isSecure() const { return false; }
virtual bool isFixedSize() const { return true; }
virtual bool isVisible() const;
virtual bool isBlurLayer() const { return true; }
virtual bool setBlurMaskLayer(sp<Layer>& maskLayer);
virtual bool setBlurMaskSampling(int32_t sampling) { mBlurMaskSampling = sampling; return true; }
virtual bool setBlurMaskAlphaThreshold(float alpha) { mBlurMaskAlphaThreshold = alpha; return true; }
private:
class BlurImpl {
public:
BlurImpl();
~BlurImpl();
status_t blur(int level, uint32_t inId, size_t inWidth, size_t inheight,
uint32_t outId, size_t* outWidth, size_t* outHeight);
protected:
static status_t initBlurImpl();
static void closeBlurImpl();
static void* sLibHandle;
typedef void* (*initBlurTokenFn)();
typedef void* (*releaseBlurTokenFn)(void*);
typedef void* (*blurFn)(void*, int, uint32_t, size_t, size_t, uint32_t, size_t*, size_t*);
static initBlurTokenFn initBlurToken;
static releaseBlurTokenFn releaseBlurToken;
static blurFn doBlur;
static Mutex sLock;
private:
void* mToken;
};
BlurImpl mBlurImpl;
wp<Layer> mBlurMaskLayer;
int32_t mBlurMaskSampling;
float mBlurMaskAlphaThreshold;
uint32_t mLastFrameSequence;
class FBO {
public:
FBO() : fbo(0), width(0), height(0) {}
int fbo;
int width;
int height;
};
void initFbo(FBO& fbo, int width, int height, int textureName);
void releaseFbo(FBO& fbo);
void ensureFbo(FBO& fbo, int width, int height, int textureName);
FBO mFboCapture;
Texture mTextureCapture;
Texture mTextureBlur;
FBO mFboMasking;
Texture mTextureMasking;
bool captureScreen(const sp<const DisplayDevice>& hw,
FBO& fbo, Texture& texture, int width, int height);
void doDrawFinal(const sp<const DisplayDevice>& hw,
int savedViewportWidth, int savedViewportHeight,
Rect savedProjectionSourceCrop, bool savedProjectionYSwap,
Transform::orientation_flags savedRotation, bool useIdentityTransform,
Texture* maskTexture);
bool drawMaskLayer(sp<Layer>& maskLayer, const sp<const DisplayDevice>& hw,
FBO& fbo, int width, int height, int sampling, Texture& texture);
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_LAYER_BLUR_H
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