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Unified Diff: src/core/SkMatrixClipStateMgr.h

Issue 453133003: Remove Matrix/Clip State collapse code (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Removed blank lines Created 6 years, 4 months ago
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Index: src/core/SkMatrixClipStateMgr.h
diff --git a/src/core/SkMatrixClipStateMgr.h b/src/core/SkMatrixClipStateMgr.h
deleted file mode 100644
index 9a80b0154e14e35bb4ef79c1e2cbe7d58f7b0eef..0000000000000000000000000000000000000000
--- a/src/core/SkMatrixClipStateMgr.h
+++ /dev/null
@@ -1,406 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#ifndef SkMatrixClipStateMgr_DEFINED
-#define SkMatrixClipStateMgr_DEFINED
-
-#include "SkCanvas.h"
-#include "SkMatrix.h"
-#include "SkRegion.h"
-#include "SkRRect.h"
-#include "SkTypes.h"
-#include "SkTDArray.h"
-
-class SkPictureRecord;
-class SkWriter32;
-
-// The SkMatrixClipStateMgr collapses the matrix/clip state of an SkPicture into
-// a series of save/restore blocks of consistent matrix clip state, e.g.:
-//
-// save
-// clip(s)
-// concat
-// ... draw ops ...
-// restore
-//
-// SaveLayers simply add another level, e.g.:
-//
-// save
-// clip(s)
-// concat
-// ... draw ops ...
-// saveLayer
-// save
-// clip(s)
-// concat
-// ... draw ops ...
-// restore
-// restore
-// restore
-//
-// As a side effect of this process all saves and saveLayers will become
-// kMatrixClip_SaveFlag style saves/saveLayers.
-
-// The SkMatrixClipStateMgr works by intercepting all the save*, restore, clip*,
-// and matrix calls sent to SkCanvas in order to track the current matrix/clip
-// state. All the other canvas calls get funnelled into a generic "call" entry
-// point that signals that a state block is required.
-class SkMatrixClipStateMgr {
-public:
- static const int32_t kIdentityWideOpenStateID = 0;
- static const int kIdentityMatID = 0;
-
- class MatrixClipState : SkNoncopyable {
- public:
- class MatrixInfo {
- public:
- void reset() {
- fMatrixID = kIdentityMatID;
- fMatrix.reset();
- }
-
- void preTranslate(SkScalar dx, SkScalar dy) {
- fMatrixID = -1;
- fMatrix.preTranslate(dx, dy);
- }
-
- void preScale(SkScalar sx, SkScalar sy) {
- fMatrixID = -1;
- fMatrix.preScale(sx, sy);
- }
-
- void preRotate(SkScalar degrees) {
- fMatrixID = -1;
- fMatrix.preRotate(degrees);
- }
-
- void preSkew(SkScalar sx, SkScalar sy) {
- fMatrixID = -1;
- fMatrix.preSkew(sx, sy);
- }
-
- void preConcat(const SkMatrix& matrix) {
- fMatrixID = -1;
- fMatrix.preConcat(matrix);
- }
-
- void setMatrix(const SkMatrix& matrix) {
- fMatrixID = -1;
- fMatrix = matrix;
- }
-
- int getID(SkMatrixClipStateMgr* mgr) {
- if (fMatrixID >= 0) {
- return fMatrixID;
- }
-
- fMatrixID = mgr->addMatToDict(fMatrix);
- return fMatrixID;
- }
-
- private:
- SkMatrix fMatrix;
- int fMatrixID;
-
- typedef SkNoncopyable INHERITED;
- };
-
- class ClipInfo : SkNoncopyable {
- public:
- ClipInfo() {}
-
- bool clipRect(const SkRect& rect,
- SkRegion::Op op,
- bool doAA,
- int matrixID) {
- ClipOp* newClip = fClips.append();
- newClip->fClipType = kRect_ClipType;
- newClip->fGeom.fRRect.setRect(rect); // storing the clipRect in the RRect
- newClip->fOp = op;
- newClip->fDoAA = doAA;
- newClip->fMatrixID = matrixID;
- return false;
- }
-
- bool clipRRect(const SkRRect& rrect,
- SkRegion::Op op,
- bool doAA,
- int matrixID) {
- ClipOp* newClip = fClips.append();
- newClip->fClipType = kRRect_ClipType;
- newClip->fGeom.fRRect = rrect;
- newClip->fOp = op;
- newClip->fDoAA = doAA;
- newClip->fMatrixID = matrixID;
- return false;
- }
-
- bool clipPath(SkPictureRecord* picRecord,
- const SkPath& path,
- SkRegion::Op op,
- bool doAA,
- int matrixID);
- bool clipRegion(SkPictureRecord* picRecord,
- int regionID,
- SkRegion::Op op,
- int matrixID);
- void writeClip(int* curMatID, SkMatrixClipStateMgr* mgr);
-
- SkDEBUGCODE(int numClips() const { return fClips.count(); })
-
- private:
- enum ClipType {
- kRect_ClipType,
- kRRect_ClipType,
- kPath_ClipType,
- kRegion_ClipType
- };
-
- class ClipOp {
- public:
- ClipType fClipType;
-
- union {
- SkRRect fRRect; // also stores clip rect
- int fPathID;
- int fRegionID;
- } fGeom;
-
- bool fDoAA;
- SkRegion::Op fOp;
-
- // The CTM in effect when this clip call was issued
- int fMatrixID;
- };
-
- SkTDArray<ClipOp> fClips;
-
- typedef SkNoncopyable INHERITED;
- };
-
- MatrixClipState(MatrixClipState* prev)
- : fPrev(prev)
- {
- fHasOpen = false;
-
- if (NULL == prev) {
- fLayerID = 0;
-
- fMatrixInfoStorage.reset();
- fMatrixInfo = &fMatrixInfoStorage;
- fClipInfo = &fClipInfoStorage; // ctor handles init of fClipInfoStorage
-
- // The identity/wide-open-clip state is current by default
- fMCStateID = kIdentityWideOpenStateID;
-#ifdef SK_DEBUG
- fExpectedDepth = 1;
-#endif
- }
- else {
- fLayerID = prev->fLayerID;
-
- fMatrixInfoStorage = *prev->fMatrixInfo;
- fMatrixInfo = &fMatrixInfoStorage;
-
- // We don't copy the ClipOps of the previous clip states
- fClipInfo = &fClipInfoStorage;
-
- // Initially a new save/saveLayer represents the same MC state
- // as its predecessor.
- fMCStateID = prev->fMCStateID;
-#ifdef SK_DEBUG
- fExpectedDepth = prev->fExpectedDepth;
-#endif
- }
-
- fIsSaveLayer = false;
- }
-
- MatrixInfo* fMatrixInfo;
- MatrixInfo fMatrixInfoStorage;
-
- ClipInfo* fClipInfo;
- ClipInfo fClipInfoStorage;
-
- // Tracks the current depth of saveLayers to support the isDrawingToLayer call
- int fLayerID;
- // Does this MC state represent a saveLayer call?
- bool fIsSaveLayer;
-
- // The next field is only valid when fIsSaveLayer is set.
- SkTDArray<int>* fSavedSkipOffsets;
-
- // Does the MC state have an open block in the skp?
- bool fHasOpen;
-
- MatrixClipState* fPrev;
-
-#ifdef SK_DEBUG
- int fExpectedDepth; // debugging aid
-#endif
-
- int32_t fMCStateID;
- };
-
- enum CallType {
- kMatrix_CallType,
- kClip_CallType,
- kOther_CallType
- };
-
- SkMatrixClipStateMgr();
- ~SkMatrixClipStateMgr();
-
- void init(SkPictureRecord* picRecord) {
- // Note: we're not taking a ref here. It is expected that the SkMatrixClipStateMgr
- // is owned by the SkPictureRecord object
- fPicRecord = picRecord;
- }
-
- SkPictureRecord* getPicRecord() { return fPicRecord; }
-
- // TODO: need to override canvas' getSaveCount. Right now we pass the
- // save* and restore calls on to the base SkCanvas in SkPictureRecord but
- // this duplicates effort.
- int getSaveCount() const { return fMatrixClipStack.count(); }
-
- int save();
-
- int saveLayer(const SkRect* bounds, const SkPaint* paint, SkCanvas::SaveFlags flags);
-
- bool isDrawingToLayer() const {
- return fCurMCState->fLayerID > 0;
- }
-
- void restore();
-
- void translate(SkScalar dx, SkScalar dy) {
- this->call(kMatrix_CallType);
- fCurMCState->fMatrixInfo->preTranslate(dx, dy);
- }
-
- void scale(SkScalar sx, SkScalar sy) {
- this->call(kMatrix_CallType);
- fCurMCState->fMatrixInfo->preScale(sx, sy);
- }
-
- void rotate(SkScalar degrees) {
- this->call(kMatrix_CallType);
- fCurMCState->fMatrixInfo->preRotate(degrees);
- }
-
- void skew(SkScalar sx, SkScalar sy) {
- this->call(kMatrix_CallType);
- fCurMCState->fMatrixInfo->preSkew(sx, sy);
- }
-
- void concat(const SkMatrix& matrix) {
- this->call(kMatrix_CallType);
- fCurMCState->fMatrixInfo->preConcat(matrix);
- }
-
- void setMatrix(const SkMatrix& matrix) {
- this->call(kMatrix_CallType);
- fCurMCState->fMatrixInfo->setMatrix(matrix);
- }
-
- bool clipRect(const SkRect& rect, SkRegion::Op op, bool doAA) {
- this->call(SkMatrixClipStateMgr::kClip_CallType);
- return fCurMCState->fClipInfo->clipRect(rect, op, doAA,
- fCurMCState->fMatrixInfo->getID(this));
- }
-
- bool clipRRect(const SkRRect& rrect, SkRegion::Op op, bool doAA) {
- this->call(SkMatrixClipStateMgr::kClip_CallType);
- return fCurMCState->fClipInfo->clipRRect(rrect, op, doAA,
- fCurMCState->fMatrixInfo->getID(this));
- }
-
- bool clipPath(const SkPath& path, SkRegion::Op op, bool doAA) {
- this->call(SkMatrixClipStateMgr::kClip_CallType);
- return fCurMCState->fClipInfo->clipPath(fPicRecord, path, op, doAA,
- fCurMCState->fMatrixInfo->getID(this));
- }
-
- bool clipRegion(const SkRegion& region, SkRegion::Op op) {
- this->call(SkMatrixClipStateMgr::kClip_CallType);
- int regionID = this->addRegionToDict(region);
- return fCurMCState->fClipInfo->clipRegion(fPicRecord, regionID, op,
- fCurMCState->fMatrixInfo->getID(this));
- }
-
- bool call(CallType callType);
-
- void fillInSkips(SkWriter32* writer, int32_t restoreOffset);
-
- void finish();
-
-protected:
- SkPictureRecord* fPicRecord;
-
- uint32_t fMatrixClipStackStorage[43]; // sized to fit 2 clip states
- SkDeque fMatrixClipStack;
- MatrixClipState* fCurMCState;
-
- // This dictionary doesn't actually de-duplicate the matrices (except for the
- // identity matrix). It merely stores the matrices and allows them to be looked
- // up by ID later. The de-duplication mainly falls upon the matrix/clip stack
- // which stores the ID so a revisited clip/matrix (via popping the stack) will
- // use the same ID.
- SkTDArray<SkMatrix> fMatrixDict;
-
- SkTDArray<SkRegion*> fRegionDict;
-
- // The MCStateID of the state currently in effect in the byte stream. 0 if none.
- int32_t fCurOpenStateID;
- // The skip offsets for the current open state. These are the locations in the
- // skp that must be filled in when the current open state is closed. These are
- // here rather then distributed across the MatrixClipState's because saveLayers
- // can cause MC states to be nested.
- SkTDArray<int32_t> *fSkipOffsets; // TODO: should we store u32 or size_t instead?
-
- SkDEBUGCODE(void validate();)
-
- int MCStackPush();
-
- void addClipOffset(size_t offset) {
- SkASSERT(NULL != fSkipOffsets);
- SkASSERT(kIdentityWideOpenStateID != fCurOpenStateID);
- SkASSERT(fCurMCState->fHasOpen);
- SkASSERT(!fCurMCState->fIsSaveLayer);
-
- *fSkipOffsets->append() = SkToS32(offset);
- }
-
- void writeDeltaMat(int currentMatID, int desiredMatID);
- static int32_t NewMCStateID();
-
- int addRegionToDict(const SkRegion& region);
- const SkRegion* lookupRegion(int index) {
- SkASSERT(index >= 0 && index < fRegionDict.count());
- return fRegionDict[index];
- }
-
- // TODO: add stats to check if the dictionary really does
- // reduce the size of the SkPicture.
- int addMatToDict(const SkMatrix& mat);
- const SkMatrix& lookupMat(int index) {
- SkASSERT(index >= 0 && index < fMatrixDict.count());
- return fMatrixDict[index];
- }
-
- bool isNestingMCState(int stateID);
-
-#ifdef SK_DEBUG
- int fActualDepth;
-#endif
-
- // save layers are nested within a specific MC state. This stack tracks
- // the nesting MC state's ID as save layers are pushed and popped.
- SkTDArray<int> fStateIDStack;
-};
-
-#endif
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