370 lines
12 KiB
C++
370 lines
12 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 <private/ui/LayerState.h>
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#include <utils/RefBase.h>
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#include <ui/Region.h>
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#include <ui/Overlay.h>
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#include <pixelflinger/pixelflinger.h>
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#include "Transform.h"
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namespace android {
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// ---------------------------------------------------------------------------
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class SurfaceFlinger;
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class DisplayHardware;
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class GraphicPlane;
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class Client;
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class SurfaceBuffer;
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class Buffer;
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// ---------------------------------------------------------------------------
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class LayerBase : public RefBase
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{
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// poor man's dynamic_cast below
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template<typename T>
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struct getTypeInfoOfAnyType {
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static uint32_t get() { return T::typeInfo; }
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};
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template<typename T>
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struct getTypeInfoOfAnyType<T*> {
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static uint32_t get() { return getTypeInfoOfAnyType<T>::get(); }
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};
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public:
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static const uint32_t typeInfo;
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static const char* const typeID;
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virtual char const* getTypeID() const { return typeID; }
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virtual uint32_t getTypeInfo() const { return typeInfo; }
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template<typename T>
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static T dynamicCast(LayerBase* base) {
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uint32_t mostDerivedInfo = base->getTypeInfo();
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uint32_t castToInfo = getTypeInfoOfAnyType<T>::get();
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if ((mostDerivedInfo & castToInfo) == castToInfo)
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return static_cast<T>(base);
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return 0;
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}
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LayerBase(SurfaceFlinger* flinger, DisplayID display);
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DisplayID dpy;
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mutable bool contentDirty;
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Region visibleRegionScreen;
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Region transparentRegionScreen;
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Region coveredRegionScreen;
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struct State {
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uint32_t w;
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uint32_t h;
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uint32_t z;
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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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uint32_t tint;
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Transform transform;
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Region transparentRegion;
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};
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// modify current state
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bool setPosition(int32_t x, int32_t 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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void commitTransaction(bool skipSize);
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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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Rect visibleBounds() const;
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void drawRegion(const Region& reg) const;
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void invalidate();
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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 Region& clip) const;
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/**
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* onDraw - draws the surface.
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*/
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virtual void onDraw(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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* setSizeChanged - called when the *current* state's size is changed.
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*/
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virtual void setSizeChanged(uint32_t w, uint32_t h);
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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 correspond 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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* getPhysicalSize - returns the physical size of the drawing state of
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* the surface. If the surface is backed by a bitmap, this is the size of
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* the bitmap (as opposed to the size of the drawing state).
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*/
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virtual Point getPhysicalSize() const;
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/**
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* validateVisibility - cache a bunch of things
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*/
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virtual void validateVisibility(const Transform& globalTransform);
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/**
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* lockPageFlip - 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 void lockPageFlip(bool& recomputeVisibleRegions);
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/**
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* unlockPageFlip - called each time the screen is redrawn. updates the
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* final dirty region wrt the planeTransform.
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* At this point, all visible regions, surface position and size, etc... are
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* correct.
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*/
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virtual void unlockPageFlip(const Transform& planeTransform, Region& outDirtyRegion);
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/**
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* finishPageFlip - called after all surfaces have drawn.
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*/
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virtual void finishPageFlip();
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/**
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* needsBlending - true if this surface needs blending
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*/
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virtual bool needsBlending() const { return false; }
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/**
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* transformed -- true is this surface needs a to be transformed
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*/
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virtual bool transformed() const { return mTransformed; }
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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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/** signal this layer that it's not needed any longer. called from the
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* main thread */
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virtual status_t ditch() { return NO_ERROR; }
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enum { // flags for doTransaction()
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eVisibleRegion = 0x00000002,
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eRestartTransaction = 0x00000008
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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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static int compareCurrentStateZ(
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sp<LayerBase> const * layerA,
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sp<LayerBase> const * layerB) {
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return layerA[0]->currentState().z - layerB[0]->currentState().z;
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}
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int32_t getOrientation() const { return mOrientation; }
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int tx() const { return mLeft; }
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int ty() const { return mTop; }
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protected:
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const GraphicPlane& graphicPlane(int dpy) const;
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GraphicPlane& graphicPlane(int dpy);
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GLuint createTexture() const;
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struct Texture {
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Texture() : name(-1U), width(0), height(0),
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image(EGL_NO_IMAGE_KHR), transform(0), dirty(true) { }
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GLuint name;
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GLuint width;
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GLuint height;
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EGLImageKHR image;
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uint32_t transform;
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bool dirty;
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};
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void clearWithOpenGL(const Region& clip, GLclampx r, GLclampx g,
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GLclampx b, GLclampx alpha) const;
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void clearWithOpenGL(const Region& clip) const;
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void drawWithOpenGL(const Region& clip, const Texture& texture) const;
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void loadTexture(Texture* texture, GLint textureName,
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const Region& dirty, const GGLSurface& t) const;
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sp<SurfaceFlinger> mFlinger;
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uint32_t mFlags;
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// cached during validateVisibility()
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bool mTransformed;
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int32_t mOrientation;
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GLfixed mVertices[4][2];
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Rect mTransformedBounds;
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int mLeft;
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int mTop;
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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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// atomic
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volatile int32_t mInvalidate;
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protected:
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virtual ~LayerBase();
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private:
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LayerBase(const LayerBase& rhs);
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void validateTexture(GLint textureName) const;
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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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class Surface;
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static const uint32_t typeInfo;
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static const char* const typeID;
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virtual char const* getTypeID() const { return typeID; }
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virtual uint32_t getTypeInfo() const { return typeInfo; }
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LayerBaseClient(SurfaceFlinger* flinger, DisplayID display,
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const sp<Client>& client, int32_t i);
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virtual ~LayerBaseClient();
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virtual void onFirstRef();
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wp<Client> client;
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layer_cblk_t* const lcblk;
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inline uint32_t getIdentity() const { return mIdentity; }
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inline int32_t clientIndex() const { return mIndex; }
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int32_t serverIndex() const;
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sp<Surface> getSurface();
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virtual sp<Surface> createSurface() const;
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class Surface : public BnSurface
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{
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public:
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int32_t getToken() const { return mToken; }
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int32_t getIdentity() const { return mIdentity; }
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protected:
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Surface(const sp<SurfaceFlinger>& flinger,
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SurfaceID id, int identity,
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const sp<LayerBaseClient>& owner);
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virtual ~Surface();
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virtual status_t onTransact(uint32_t code, const Parcel& data,
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Parcel* reply, uint32_t flags);
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sp<LayerBaseClient> getOwner() const;
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private:
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virtual sp<SurfaceBuffer> getBuffer(int usage);
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virtual status_t registerBuffers(const ISurface::BufferHeap& buffers);
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virtual void postBuffer(ssize_t offset);
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virtual void unregisterBuffers();
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virtual sp<OverlayRef> createOverlay(uint32_t w, uint32_t h,
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int32_t format);
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protected:
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friend class LayerBaseClient;
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sp<SurfaceFlinger> mFlinger;
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int32_t mToken;
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int32_t mIdentity;
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wp<LayerBaseClient> mOwner;
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};
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friend class Surface;
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private:
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int32_t mIndex;
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mutable Mutex mLock;
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mutable wp<Surface> mClientSurface;
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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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