c397360883
we used to have a visibleRegion object per layer, but now it's per screen; so at somepoint the code got changed to calculate the per-screen visible region on the stack and that's what got passed to HWC. we're now setting the visibleRegionScreen at each frame and freeing at after the HWC set() call. We use the underlaying SharedBuffer so that in most cases we don't have to allocate, free or copy memory around. Bug: 7089478 Change-Id: I24fa556c76613a225d9fe7a6c6b727bb476144d8
341 lines
11 KiB
C++
341 lines
11 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_LAYER_BASE_H
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#define ANDROID_LAYER_BASE_H
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#include <stdint.h>
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#include <sys/types.h>
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <GLES/gl.h>
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#include <utils/RefBase.h>
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#include <utils/String8.h>
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#include <ui/Region.h>
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#include <gui/ISurfaceComposerClient.h>
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#include <private/gui/LayerState.h>
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#include "Transform.h"
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#include "DisplayHardware/HWComposer.h"
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namespace android {
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// ---------------------------------------------------------------------------
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class Client;
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class DisplayDevice;
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class GraphicBuffer;
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class Layer;
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class LayerBaseClient;
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class SurfaceFlinger;
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// ---------------------------------------------------------------------------
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class LayerBase : public RefBase
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{
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static int32_t sSequence;
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public:
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LayerBase(SurfaceFlinger* flinger);
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mutable bool contentDirty;
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// regions below are in window-manager space
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Region visibleRegion;
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Region coveredRegion;
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int32_t sequence;
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struct Geometry {
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uint32_t w;
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uint32_t h;
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Rect crop;
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inline bool operator == (const Geometry& rhs) const {
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return (w==rhs.w && h==rhs.h && crop==rhs.crop);
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}
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inline bool operator != (const Geometry& rhs) const {
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return !operator == (rhs);
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}
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};
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struct State {
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Geometry active;
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Geometry requested;
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uint32_t z;
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uint32_t layerStack;
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uint8_t alpha;
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uint8_t flags;
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uint8_t reserved[2];
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int32_t sequence; // changes when visible regions can change
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Transform transform;
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Region transparentRegion;
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};
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class LayerMesh {
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friend class LayerBase;
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GLfloat mVertices[4][2];
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size_t mNumVertices;
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public:
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LayerMesh() : mNumVertices(4) { }
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GLfloat const* getVertices() const {
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return &mVertices[0][0];
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}
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size_t getVertexCount() const {
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return mNumVertices;
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}
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};
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virtual void setName(const String8& name);
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String8 getName() const;
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// modify current state
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bool setPosition(float x, float y);
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bool setLayer(uint32_t z);
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bool setSize(uint32_t w, uint32_t h);
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bool setAlpha(uint8_t alpha);
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bool setMatrix(const layer_state_t::matrix22_t& matrix);
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bool setTransparentRegionHint(const Region& opaque);
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bool setFlags(uint8_t flags, uint8_t mask);
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bool setCrop(const Rect& crop);
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bool setLayerStack(uint32_t layerStack);
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void commitTransaction();
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bool requestTransaction();
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void forceVisibilityTransaction();
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uint32_t getTransactionFlags(uint32_t flags);
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uint32_t setTransactionFlags(uint32_t flags);
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void computeGeometry(const sp<const DisplayDevice>& hw, LayerMesh* mesh) const;
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Rect computeBounds() const;
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virtual sp<LayerBaseClient> getLayerBaseClient() const;
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virtual sp<Layer> getLayer() const;
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virtual const char* getTypeId() const { return "LayerBase"; }
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virtual void setGeometry(const sp<const DisplayDevice>& hw,
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HWComposer::HWCLayerInterface& layer);
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virtual void setPerFrameData(const sp<const DisplayDevice>& hw,
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HWComposer::HWCLayerInterface& layer);
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virtual void setAcquireFence(const sp<const DisplayDevice>& hw,
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HWComposer::HWCLayerInterface& layer);
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/**
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* draw - performs some global clipping optimizations
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* and calls onDraw().
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* Typically this method is not overridden, instead implement onDraw()
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* to perform the actual drawing.
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*/
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virtual void draw(const sp<const DisplayDevice>& hw, const Region& clip) const;
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virtual void draw(const sp<const DisplayDevice>& hw);
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/**
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* onDraw - draws the surface.
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*/
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virtual void onDraw(const sp<const DisplayDevice>& hw, const Region& clip) const = 0;
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/**
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* initStates - called just after construction
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*/
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virtual void initStates(uint32_t w, uint32_t h, uint32_t flags);
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/**
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* doTransaction - process the transaction. This is a good place to figure
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* out which attributes of the surface have changed.
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*/
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virtual uint32_t doTransaction(uint32_t transactionFlags);
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/**
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* setVisibleRegion - called to set the new visible region. This gives
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* a chance to update the new visible region or record the fact it changed.
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*/
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virtual void setVisibleRegion(const Region& visibleRegion);
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/**
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* setCoveredRegion - called when the covered region changes. The covered
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* region corresponds to any area of the surface that is covered
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* (transparently or not) by another surface.
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*/
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virtual void setCoveredRegion(const Region& coveredRegion);
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/**
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* latchBuffer - called each time the screen is redrawn and returns whether
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* the visible regions need to be recomputed (this is a fairly heavy
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* operation, so this should be set only if needed). Typically this is used
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* to figure out if the content or size of a surface has changed.
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*/
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virtual Region latchBuffer(bool& recomputeVisibleRegions);
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/**
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* isOpaque - true if this surface is opaque
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*/
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virtual bool isOpaque() const { return true; }
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/**
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* needsDithering - true if this surface needs dithering
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*/
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virtual bool needsDithering() const { return false; }
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/**
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* needsLinearFiltering - true if this surface's state requires filtering
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*/
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virtual bool needsFiltering() const { return mNeedsFiltering; }
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/**
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* isSecure - true if this surface is secure, that is if it prevents
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* screenshots or VNC servers.
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*/
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virtual bool isSecure() const { return false; }
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/**
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* isProtected - true if the layer may contain protected content in the
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* GRALLOC_USAGE_PROTECTED sense.
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*/
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virtual bool isProtected() const { return false; }
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/** called with the state lock when the surface is removed from the
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* current list */
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virtual void onRemoved() { }
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/** called after page-flip
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*/
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virtual void onLayerDisplayed(const sp<const DisplayDevice>& hw,
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HWComposer::HWCLayerInterface* layer);
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/** called before composition.
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* returns true if the layer has pending updates.
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*/
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virtual bool onPreComposition() { return false; }
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/** called before composition.
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*/
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virtual void onPostComposition() { }
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/** always call base class first */
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virtual void dump(String8& result, char* scratch, size_t size) const;
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virtual void shortDump(String8& result, char* scratch, size_t size) const;
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virtual void dumpStats(String8& result, char* buffer, size_t SIZE) const;
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virtual void clearStats();
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enum { // flags for doTransaction()
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eDontUpdateGeometryState = 0x00000001,
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eVisibleRegion = 0x00000002,
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};
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inline const State& drawingState() const { return mDrawingState; }
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inline const State& currentState() const { return mCurrentState; }
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inline State& currentState() { return mCurrentState; }
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void clearWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip) const;
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void setFiltering(bool filtering);
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bool getFiltering() const;
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protected:
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void clearWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip,
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GLclampf r, GLclampf g, GLclampf b, GLclampf alpha) const;
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void drawWithOpenGL(const sp<const DisplayDevice>& hw, const Region& clip) const;
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sp<SurfaceFlinger> mFlinger;
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private:
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// accessed only in the main thread
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// Whether filtering is forced on or not
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bool mFiltering;
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// Whether filtering is needed b/c of the drawingstate
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bool mNeedsFiltering;
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protected:
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// these are protected by an external lock
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State mCurrentState;
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State mDrawingState;
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volatile int32_t mTransactionFlags;
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// don't change, don't need a lock
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bool mPremultipliedAlpha;
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String8 mName;
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mutable bool mDebug;
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public:
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// called from class SurfaceFlinger
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virtual ~LayerBase();
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private:
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LayerBase(const LayerBase& rhs);
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};
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// ---------------------------------------------------------------------------
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class LayerBaseClient : public LayerBase
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{
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public:
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LayerBaseClient(SurfaceFlinger* flinger, const sp<Client>& client);
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virtual ~LayerBaseClient();
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sp<ISurface> getSurface();
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wp<IBinder> getSurfaceBinder() const;
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virtual wp<IBinder> getSurfaceTextureBinder() const;
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virtual sp<LayerBaseClient> getLayerBaseClient() const {
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return const_cast<LayerBaseClient*>(this); }
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virtual const char* getTypeId() const { return "LayerBaseClient"; }
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uint32_t getIdentity() const { return mIdentity; }
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protected:
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virtual void dump(String8& result, char* scratch, size_t size) const;
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virtual void shortDump(String8& result, char* scratch, size_t size) const;
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class LayerCleaner {
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sp<SurfaceFlinger> mFlinger;
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wp<LayerBaseClient> mLayer;
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protected:
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~LayerCleaner();
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public:
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LayerCleaner(const sp<SurfaceFlinger>& flinger,
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const sp<LayerBaseClient>& layer);
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};
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private:
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virtual sp<ISurface> createSurface();
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mutable Mutex mLock;
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mutable bool mHasSurface;
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wp<IBinder> mClientSurfaceBinder;
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const wp<Client> mClientRef;
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// only read
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const uint32_t mIdentity;
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static int32_t sIdentity;
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};
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// ---------------------------------------------------------------------------
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}; // namespace android
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#endif // ANDROID_LAYER_BASE_H
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