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/*
* Copyright (C) 2013 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_HWUI_DEFERRED_DISPLAY_LIST_H
#define ANDROID_HWUI_DEFERRED_DISPLAY_LIST_H
#include <utils/Errors.h>
#include <utils/LinearAllocator.h>
#include <utils/Vector.h>
#include <utils/TinyHashMap.h>
#include "Matrix.h"
#include "OpenGLRenderer.h"
#include "Rect.h"
class SkBitmap;
namespace android {
namespace uirenderer {
class ClipOp;
class DrawOp;
class SaveOp;
class SaveLayerOp;
class StateOp;
class DeferredDisplayState;
class OpenGLRenderer;
class Batch;
class DrawBatch;
class MergingDrawBatch;
typedef const void* mergeid_t;
class DeferredDisplayState {
public:
/** static void* operator new(size_t size); PURPOSELY OMITTED **/
static void* operator new(size_t size, LinearAllocator& allocator) {
return allocator.alloc(size);
}
// global op bounds, mapped by mMatrix to be in screen space coordinates, clipped
Rect mBounds;
// the below are set and used by the OpenGLRenderer at record and deferred playback
bool mClipValid;
Rect mClip;
int mClipSideFlags; // specifies which sides of the bounds are clipped, unclipped if cleared
bool mClipped;
mat4 mMatrix;
DrawModifiers mDrawModifiers;
float mAlpha;
};
class OpStatePair {
public:
OpStatePair()
: op(NULL), state(NULL) {}
OpStatePair(DrawOp* newOp, const DeferredDisplayState* newState)
: op(newOp), state(newState) {}
OpStatePair(const OpStatePair& other)
: op(other.op), state(other.state) {}
DrawOp* op;
const DeferredDisplayState* state;
};
class DeferredDisplayList {
public:
DeferredDisplayList(const Rect& bounds, bool avoidOverdraw = true) :
mBounds(bounds), mAvoidOverdraw(avoidOverdraw) {
clear();
}
~DeferredDisplayList() { clear(); }
void reset(const Rect& bounds) { mBounds.set(bounds); }
enum OpBatchId {
kOpBatch_None = 0, // Don't batch
kOpBatch_Bitmap,
kOpBatch_Patch,
kOpBatch_AlphaVertices,
kOpBatch_Vertices,
kOpBatch_AlphaMaskTexture,
kOpBatch_Text,
kOpBatch_ColorText,
kOpBatch_Count, // Add other batch ids before this
};
bool isEmpty() { return mBatches.isEmpty(); }
/**
* Plays back all of the draw ops recorded into batches to the renderer.
* Adjusts the state of the renderer as necessary, and restores it when complete
*/
status_t flush(OpenGLRenderer& renderer, Rect& dirty);
void addClip(OpenGLRenderer& renderer, ClipOp* op);
void addSaveLayer(OpenGLRenderer& renderer, SaveLayerOp* op, int newSaveCount);
void addSave(OpenGLRenderer& renderer, SaveOp* op, int newSaveCount);
void addRestoreToCount(OpenGLRenderer& renderer, StateOp* op, int newSaveCount);
/**
* Add a draw op into the DeferredDisplayList, reordering as needed (for performance) if
* disallowReorder is false, respecting draw order when overlaps occur.
*/
void addDrawOp(OpenGLRenderer& renderer, DrawOp* op);
private:
DeferredDisplayState* createState() {
return new (mAllocator) DeferredDisplayState();
}
void tryRecycleState(DeferredDisplayState* state) {
mAllocator.rewindIfLastAlloc(state, sizeof(DeferredDisplayState));
}
/**
* Resets the batching back-pointers, creating a barrier in the operation stream so that no ops
* added in the future will be inserted into a batch that already exist.
*/
void resetBatchingState();
void clear();
void storeStateOpBarrier(OpenGLRenderer& renderer, StateOp* op);
void storeRestoreToCountBarrier(OpenGLRenderer& renderer, StateOp* op, int newSaveCount);
bool recordingComplexClip() const { return mComplexClipStackStart >= 0; }
int getStateOpDeferFlags() const;
int getDrawOpDeferFlags() const;
void discardDrawingBatches(const unsigned int maxIndex);
// layer space bounds of rendering
Rect mBounds;
const bool mAvoidOverdraw;
/**
* At defer time, stores the *defer time* savecount of save/saveLayer ops that were deferred, so
* that when an associated restoreToCount is deferred, it can be recorded as a
* RestoreToCountBatch
*/
Vector<int> mSaveStack;
int mComplexClipStackStart;
Vector<Batch*> mBatches;
// Maps batch ids to the most recent *non-merging* batch of that id
Batch* mBatchLookup[kOpBatch_Count];
// Points to the index after the most recent barrier
int mEarliestBatchIndex;
// Points to the first index that may contain a pure drawing batch
int mEarliestUnclearedIndex;
/**
* Maps the mergeid_t returned by an op's getMergeId() to the most recently seen
* MergingDrawBatch of that id. These ids are unique per draw type and guaranteed to not
* collide, which avoids the need to resolve mergeid collisions.
*/
TinyHashMap<mergeid_t, DrawBatch*> mMergingBatches[kOpBatch_Count];
LinearAllocator mAllocator;
};
/**
* Struct containing information that instructs the defer
*/
struct DeferInfo {
public:
DeferInfo() :
batchId(DeferredDisplayList::kOpBatch_None),
mergeId((mergeid_t) -1),
mergeable(false),
opaqueOverBounds(false) {
};
int batchId;
mergeid_t mergeId;
bool mergeable;
bool opaqueOverBounds; // opaque over bounds in DeferredDisplayState - can skip ops below
};
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_DEFERRED_DISPLAY_LIST_H
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