| |
| /* |
| * Copyright 2008 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkCanvas.h" |
| #include "SkBitmapDevice.h" |
| #include "SkBounder.h" |
| #include "SkDeviceImageFilterProxy.h" |
| #include "SkDraw.h" |
| #include "SkDrawFilter.h" |
| #include "SkDrawLooper.h" |
| #include "SkMetaData.h" |
| #include "SkPathOps.h" |
| #include "SkPicture.h" |
| #include "SkRasterClip.h" |
| #include "SkRRect.h" |
| #include "SkSmallAllocator.h" |
| #include "SkSurface_Base.h" |
| #include "SkTemplates.h" |
| #include "SkTextFormatParams.h" |
| #include "SkTLazy.h" |
| #include "SkUtils.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "GrRenderTarget.h" |
| #endif |
| |
| // experimental for faster tiled drawing... |
| //#define SK_ENABLE_CLIP_QUICKREJECT |
| |
| //#define SK_TRACE_SAVERESTORE |
| |
| #ifdef SK_TRACE_SAVERESTORE |
| static int gLayerCounter; |
| static void inc_layer() { ++gLayerCounter; printf("----- inc layer %d\n", gLayerCounter); } |
| static void dec_layer() { --gLayerCounter; printf("----- dec layer %d\n", gLayerCounter); } |
| |
| static int gRecCounter; |
| static void inc_rec() { ++gRecCounter; printf("----- inc rec %d\n", gRecCounter); } |
| static void dec_rec() { --gRecCounter; printf("----- dec rec %d\n", gRecCounter); } |
| |
| static int gCanvasCounter; |
| static void inc_canvas() { ++gCanvasCounter; printf("----- inc canvas %d\n", gCanvasCounter); } |
| static void dec_canvas() { --gCanvasCounter; printf("----- dec canvas %d\n", gCanvasCounter); } |
| #else |
| #define inc_layer() |
| #define dec_layer() |
| #define inc_rec() |
| #define dec_rec() |
| #define inc_canvas() |
| #define dec_canvas() |
| #endif |
| |
| #ifdef SK_DEBUG |
| #include "SkPixelRef.h" |
| |
| /* |
| * Some pixelref subclasses can support being "locked" from another thread |
| * during the lock-scope of skia calling them. In these instances, this balance |
| * check will fail, but may not be indicative of a problem, so we allow a build |
| * flag to disable this check. |
| * |
| * Potentially another fix would be to have a (debug-only) virtual or flag on |
| * pixelref, which could tell us at runtime if this check is valid. That would |
| * eliminate the need for this heavy-handed build check. |
| */ |
| #ifdef SK_DISABLE_PIXELREF_LOCKCOUNT_BALANCE_CHECK |
| class AutoCheckLockCountBalance { |
| public: |
| AutoCheckLockCountBalance(const SkBitmap&) { /* do nothing */ } |
| }; |
| #else |
| class AutoCheckLockCountBalance { |
| public: |
| AutoCheckLockCountBalance(const SkBitmap& bm) : fPixelRef(bm.pixelRef()) { |
| fLockCount = fPixelRef ? fPixelRef->getLockCount() : 0; |
| } |
| ~AutoCheckLockCountBalance() { |
| const int count = fPixelRef ? fPixelRef->getLockCount() : 0; |
| SkASSERT(count == fLockCount); |
| } |
| |
| private: |
| const SkPixelRef* fPixelRef; |
| int fLockCount; |
| }; |
| #endif |
| |
| class AutoCheckNoSetContext { |
| public: |
| AutoCheckNoSetContext(const SkPaint& paint) : fPaint(paint) { |
| this->assertNoSetContext(fPaint); |
| } |
| ~AutoCheckNoSetContext() { |
| this->assertNoSetContext(fPaint); |
| } |
| |
| private: |
| const SkPaint& fPaint; |
| |
| void assertNoSetContext(const SkPaint& paint) { |
| SkShader* s = paint.getShader(); |
| if (s) { |
| SkASSERT(!s->setContextHasBeenCalled()); |
| } |
| } |
| }; |
| |
| #define CHECK_LOCKCOUNT_BALANCE(bitmap) AutoCheckLockCountBalance clcb(bitmap) |
| #define CHECK_SHADER_NOSETCONTEXT(paint) AutoCheckNoSetContext cshsc(paint) |
| |
| #else |
| #define CHECK_LOCKCOUNT_BALANCE(bitmap) |
| #define CHECK_SHADER_NOSETCONTEXT(paint) |
| #endif |
| |
| typedef SkTLazy<SkPaint> SkLazyPaint; |
| |
| void SkCanvas::predrawNotify() { |
| if (fSurfaceBase) { |
| fSurfaceBase->aboutToDraw(SkSurface::kRetain_ContentChangeMode); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /* This is the record we keep for each SkBaseDevice that the user installs. |
| The clip/matrix/proc are fields that reflect the top of the save/restore |
| stack. Whenever the canvas changes, it marks a dirty flag, and then before |
| these are used (assuming we're not on a layer) we rebuild these cache |
| values: they reflect the top of the save stack, but translated and clipped |
| by the device's XY offset and bitmap-bounds. |
| */ |
| struct DeviceCM { |
| DeviceCM* fNext; |
| SkBaseDevice* fDevice; |
| SkRasterClip fClip; |
| const SkMatrix* fMatrix; |
| SkPaint* fPaint; // may be null (in the future) |
| |
| DeviceCM(SkBaseDevice* device, int x, int y, const SkPaint* paint, SkCanvas* canvas) |
| : fNext(NULL) { |
| if (NULL != device) { |
| device->ref(); |
| device->onAttachToCanvas(canvas); |
| } |
| fDevice = device; |
| fPaint = paint ? SkNEW_ARGS(SkPaint, (*paint)) : NULL; |
| } |
| |
| ~DeviceCM() { |
| if (NULL != fDevice) { |
| fDevice->onDetachFromCanvas(); |
| fDevice->unref(); |
| } |
| SkDELETE(fPaint); |
| } |
| |
| void updateMC(const SkMatrix& totalMatrix, const SkRasterClip& totalClip, |
| const SkClipStack& clipStack, SkRasterClip* updateClip) { |
| int x = fDevice->getOrigin().x(); |
| int y = fDevice->getOrigin().y(); |
| int width = fDevice->width(); |
| int height = fDevice->height(); |
| |
| if ((x | y) == 0) { |
| fMatrix = &totalMatrix; |
| fClip = totalClip; |
| } else { |
| fMatrixStorage = totalMatrix; |
| fMatrixStorage.postTranslate(SkIntToScalar(-x), |
| SkIntToScalar(-y)); |
| fMatrix = &fMatrixStorage; |
| |
| totalClip.translate(-x, -y, &fClip); |
| } |
| |
| fClip.op(SkIRect::MakeWH(width, height), SkRegion::kIntersect_Op); |
| |
| // intersect clip, but don't translate it (yet) |
| |
| if (updateClip) { |
| updateClip->op(SkIRect::MakeXYWH(x, y, width, height), |
| SkRegion::kDifference_Op); |
| } |
| |
| fDevice->setMatrixClip(*fMatrix, fClip.forceGetBW(), clipStack); |
| |
| #ifdef SK_DEBUG |
| if (!fClip.isEmpty()) { |
| SkIRect deviceR; |
| deviceR.set(0, 0, width, height); |
| SkASSERT(deviceR.contains(fClip.getBounds())); |
| } |
| #endif |
| } |
| |
| private: |
| SkMatrix fMatrixStorage; |
| }; |
| |
| /* This is the record we keep for each save/restore level in the stack. |
| Since a level optionally copies the matrix and/or stack, we have pointers |
| for these fields. If the value is copied for this level, the copy is |
| stored in the ...Storage field, and the pointer points to that. If the |
| value is not copied for this level, we ignore ...Storage, and just point |
| at the corresponding value in the previous level in the stack. |
| */ |
| class SkCanvas::MCRec { |
| public: |
| int fFlags; |
| SkMatrix* fMatrix; // points to either fMatrixStorage or prev MCRec |
| SkRasterClip* fRasterClip; // points to either fRegionStorage or prev MCRec |
| SkDrawFilter* fFilter; // the current filter (or null) |
| |
| DeviceCM* fLayer; |
| /* If there are any layers in the stack, this points to the top-most |
| one that is at or below this level in the stack (so we know what |
| bitmap/device to draw into from this level. This value is NOT |
| reference counted, since the real owner is either our fLayer field, |
| or a previous one in a lower level.) |
| */ |
| DeviceCM* fTopLayer; |
| |
| MCRec(const MCRec* prev, int flags) : fFlags(flags) { |
| if (NULL != prev) { |
| if (flags & SkCanvas::kMatrix_SaveFlag) { |
| fMatrixStorage = *prev->fMatrix; |
| fMatrix = &fMatrixStorage; |
| } else { |
| fMatrix = prev->fMatrix; |
| } |
| |
| if (flags & SkCanvas::kClip_SaveFlag) { |
| fRasterClipStorage = *prev->fRasterClip; |
| fRasterClip = &fRasterClipStorage; |
| } else { |
| fRasterClip = prev->fRasterClip; |
| } |
| |
| fFilter = prev->fFilter; |
| SkSafeRef(fFilter); |
| |
| fTopLayer = prev->fTopLayer; |
| } else { // no prev |
| fMatrixStorage.reset(); |
| |
| fMatrix = &fMatrixStorage; |
| fRasterClip = &fRasterClipStorage; |
| fFilter = NULL; |
| fTopLayer = NULL; |
| } |
| fLayer = NULL; |
| |
| // don't bother initializing fNext |
| inc_rec(); |
| } |
| ~MCRec() { |
| SkSafeUnref(fFilter); |
| SkDELETE(fLayer); |
| dec_rec(); |
| } |
| |
| private: |
| SkMatrix fMatrixStorage; |
| SkRasterClip fRasterClipStorage; |
| }; |
| |
| class SkDrawIter : public SkDraw { |
| public: |
| SkDrawIter(SkCanvas* canvas, bool skipEmptyClips = true) { |
| canvas = canvas->canvasForDrawIter(); |
| fCanvas = canvas; |
| canvas->updateDeviceCMCache(); |
| |
| fClipStack = &canvas->fClipStack; |
| fBounder = canvas->getBounder(); |
| fCurrLayer = canvas->fMCRec->fTopLayer; |
| fSkipEmptyClips = skipEmptyClips; |
| } |
| |
| bool next() { |
| // skip over recs with empty clips |
| if (fSkipEmptyClips) { |
| while (fCurrLayer && fCurrLayer->fClip.isEmpty()) { |
| fCurrLayer = fCurrLayer->fNext; |
| } |
| } |
| |
| const DeviceCM* rec = fCurrLayer; |
| if (rec && rec->fDevice) { |
| |
| fMatrix = rec->fMatrix; |
| fClip = &((SkRasterClip*)&rec->fClip)->forceGetBW(); |
| fRC = &rec->fClip; |
| fDevice = rec->fDevice; |
| fBitmap = &fDevice->accessBitmap(true); |
| fPaint = rec->fPaint; |
| SkDEBUGCODE(this->validate();) |
| |
| fCurrLayer = rec->fNext; |
| if (fBounder) { |
| fBounder->setClip(fClip); |
| } |
| // fCurrLayer may be NULL now |
| |
| return true; |
| } |
| return false; |
| } |
| |
| SkBaseDevice* getDevice() const { return fDevice; } |
| int getX() const { return fDevice->getOrigin().x(); } |
| int getY() const { return fDevice->getOrigin().y(); } |
| const SkMatrix& getMatrix() const { return *fMatrix; } |
| const SkRegion& getClip() const { return *fClip; } |
| const SkPaint* getPaint() const { return fPaint; } |
| |
| private: |
| SkCanvas* fCanvas; |
| const DeviceCM* fCurrLayer; |
| const SkPaint* fPaint; // May be null. |
| SkBool8 fSkipEmptyClips; |
| |
| typedef SkDraw INHERITED; |
| }; |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| class AutoDrawLooper { |
| public: |
| AutoDrawLooper(SkCanvas* canvas, const SkPaint& paint, |
| bool skipLayerForImageFilter = false, |
| const SkRect* bounds = NULL) : fOrigPaint(paint) { |
| fCanvas = canvas; |
| fFilter = canvas->getDrawFilter(); |
| fPaint = NULL; |
| fSaveCount = canvas->getSaveCount(); |
| fDoClearImageFilter = false; |
| fDone = false; |
| |
| if (!skipLayerForImageFilter && fOrigPaint.getImageFilter()) { |
| SkPaint tmp; |
| tmp.setImageFilter(fOrigPaint.getImageFilter()); |
| (void)canvas->internalSaveLayer(bounds, &tmp, SkCanvas::kARGB_ClipLayer_SaveFlag, |
| true, SkCanvas::kFullLayer_SaveLayerStrategy); |
| // we'll clear the imageFilter for the actual draws in next(), so |
| // it will only be applied during the restore(). |
| fDoClearImageFilter = true; |
| } |
| |
| if (SkDrawLooper* looper = paint.getLooper()) { |
| void* buffer = fLooperContextAllocator.reserveT<SkDrawLooper::Context>( |
| looper->contextSize()); |
| fLooperContext = looper->createContext(canvas, buffer); |
| fIsSimple = false; |
| } else { |
| fLooperContext = NULL; |
| // can we be marked as simple? |
| fIsSimple = !fFilter && !fDoClearImageFilter; |
| } |
| } |
| |
| ~AutoDrawLooper() { |
| if (fDoClearImageFilter) { |
| fCanvas->internalRestore(); |
| } |
| SkASSERT(fCanvas->getSaveCount() == fSaveCount); |
| } |
| |
| const SkPaint& paint() const { |
| SkASSERT(fPaint); |
| return *fPaint; |
| } |
| |
| bool next(SkDrawFilter::Type drawType) { |
| if (fDone) { |
| return false; |
| } else if (fIsSimple) { |
| fDone = true; |
| fPaint = &fOrigPaint; |
| return !fPaint->nothingToDraw(); |
| } else { |
| return this->doNext(drawType); |
| } |
| } |
| |
| private: |
| SkLazyPaint fLazyPaint; |
| SkCanvas* fCanvas; |
| const SkPaint& fOrigPaint; |
| SkDrawFilter* fFilter; |
| const SkPaint* fPaint; |
| int fSaveCount; |
| bool fDoClearImageFilter; |
| bool fDone; |
| bool fIsSimple; |
| SkDrawLooper::Context* fLooperContext; |
| SkSmallAllocator<1, 32> fLooperContextAllocator; |
| |
| bool doNext(SkDrawFilter::Type drawType); |
| }; |
| |
| bool AutoDrawLooper::doNext(SkDrawFilter::Type drawType) { |
| fPaint = NULL; |
| SkASSERT(!fIsSimple); |
| SkASSERT(fLooperContext || fFilter || fDoClearImageFilter); |
| |
| SkPaint* paint = fLazyPaint.set(fOrigPaint); |
| |
| if (fDoClearImageFilter) { |
| paint->setImageFilter(NULL); |
| } |
| |
| if (fLooperContext && !fLooperContext->next(fCanvas, paint)) { |
| fDone = true; |
| return false; |
| } |
| if (fFilter) { |
| if (!fFilter->filter(paint, drawType)) { |
| fDone = true; |
| return false; |
| } |
| if (NULL == fLooperContext) { |
| // no looper means we only draw once |
| fDone = true; |
| } |
| } |
| fPaint = paint; |
| |
| // if we only came in here for the imagefilter, mark us as done |
| if (!fLooperContext && !fFilter) { |
| fDone = true; |
| } |
| |
| // call this after any possible paint modifiers |
| if (fPaint->nothingToDraw()) { |
| fPaint = NULL; |
| return false; |
| } |
| return true; |
| } |
| |
| /* Stack helper for managing a SkBounder. In the destructor, if we were |
| given a bounder, we call its commit() method, signifying that we are |
| done accumulating bounds for that draw. |
| */ |
| class SkAutoBounderCommit { |
| public: |
| SkAutoBounderCommit(SkBounder* bounder) : fBounder(bounder) {} |
| ~SkAutoBounderCommit() { |
| if (NULL != fBounder) { |
| fBounder->commit(); |
| } |
| } |
| private: |
| SkBounder* fBounder; |
| }; |
| #define SkAutoBounderCommit(...) SK_REQUIRE_LOCAL_VAR(SkAutoBounderCommit) |
| |
| #include "SkColorPriv.h" |
| |
| ////////// macros to place around the internal draw calls ////////////////// |
| |
| #define LOOPER_BEGIN_DRAWDEVICE(paint, type) \ |
| this->predrawNotify(); \ |
| AutoDrawLooper looper(this, paint, true); \ |
| while (looper.next(type)) { \ |
| SkAutoBounderCommit ac(fBounder); \ |
| SkDrawIter iter(this); |
| |
| #define LOOPER_BEGIN(paint, type, bounds) \ |
| this->predrawNotify(); \ |
| AutoDrawLooper looper(this, paint, false, bounds); \ |
| while (looper.next(type)) { \ |
| SkAutoBounderCommit ac(fBounder); \ |
| SkDrawIter iter(this); |
| |
| #define LOOPER_END } |
| |
| //////////////////////////////////////////////////////////////////////////// |
| |
| SkBaseDevice* SkCanvas::init(SkBaseDevice* device) { |
| fBounder = NULL; |
| fCachedLocalClipBounds.setEmpty(); |
| fCachedLocalClipBoundsDirty = true; |
| fAllowSoftClip = true; |
| fAllowSimplifyClip = false; |
| fDeviceCMDirty = false; |
| fSaveLayerCount = 0; |
| fCullCount = 0; |
| fMetaData = NULL; |
| |
| fMCRec = (MCRec*)fMCStack.push_back(); |
| new (fMCRec) MCRec(NULL, 0); |
| |
| fMCRec->fLayer = SkNEW_ARGS(DeviceCM, (NULL, 0, 0, NULL, NULL)); |
| fMCRec->fTopLayer = fMCRec->fLayer; |
| |
| fSurfaceBase = NULL; |
| |
| return this->setRootDevice(device); |
| } |
| |
| SkCanvas::SkCanvas() |
| : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) |
| { |
| inc_canvas(); |
| |
| this->init(NULL); |
| } |
| |
| SkCanvas::SkCanvas(int width, int height) |
| : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) |
| { |
| inc_canvas(); |
| |
| SkBitmap bitmap; |
| bitmap.setConfig(SkImageInfo::MakeUnknown(width, height)); |
| this->init(SkNEW_ARGS(SkBitmapDevice, (bitmap)))->unref(); |
| } |
| |
| SkCanvas::SkCanvas(SkBaseDevice* device) |
| : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) |
| { |
| inc_canvas(); |
| |
| this->init(device); |
| } |
| |
| SkCanvas::SkCanvas(const SkBitmap& bitmap) |
| : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) |
| { |
| inc_canvas(); |
| |
| this->init(SkNEW_ARGS(SkBitmapDevice, (bitmap)))->unref(); |
| } |
| |
| SkCanvas::~SkCanvas() { |
| // free up the contents of our deque |
| this->restoreToCount(1); // restore everything but the last |
| SkASSERT(0 == fSaveLayerCount); |
| |
| this->internalRestore(); // restore the last, since we're going away |
| |
| SkSafeUnref(fBounder); |
| SkDELETE(fMetaData); |
| |
| dec_canvas(); |
| } |
| |
| SkBounder* SkCanvas::setBounder(SkBounder* bounder) { |
| SkRefCnt_SafeAssign(fBounder, bounder); |
| return bounder; |
| } |
| |
| SkDrawFilter* SkCanvas::getDrawFilter() const { |
| return fMCRec->fFilter; |
| } |
| |
| SkDrawFilter* SkCanvas::setDrawFilter(SkDrawFilter* filter) { |
| SkRefCnt_SafeAssign(fMCRec->fFilter, filter); |
| return filter; |
| } |
| |
| SkMetaData& SkCanvas::getMetaData() { |
| // metadata users are rare, so we lazily allocate it. If that changes we |
| // can decide to just make it a field in the device (rather than a ptr) |
| if (NULL == fMetaData) { |
| fMetaData = new SkMetaData; |
| } |
| return *fMetaData; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::flush() { |
| SkBaseDevice* device = this->getDevice(); |
| if (device) { |
| device->flush(); |
| } |
| } |
| |
| SkISize SkCanvas::getTopLayerSize() const { |
| SkBaseDevice* d = this->getTopDevice(); |
| return d ? SkISize::Make(d->width(), d->height()) : SkISize::Make(0, 0); |
| } |
| |
| SkIPoint SkCanvas::getTopLayerOrigin() const { |
| SkBaseDevice* d = this->getTopDevice(); |
| return d ? d->getOrigin() : SkIPoint::Make(0, 0); |
| } |
| |
| SkISize SkCanvas::getBaseLayerSize() const { |
| SkBaseDevice* d = this->getDevice(); |
| return d ? SkISize::Make(d->width(), d->height()) : SkISize::Make(0, 0); |
| } |
| |
| SkBaseDevice* SkCanvas::getDevice() const { |
| // return root device |
| MCRec* rec = (MCRec*) fMCStack.front(); |
| SkASSERT(rec && rec->fLayer); |
| return rec->fLayer->fDevice; |
| } |
| |
| SkBaseDevice* SkCanvas::getTopDevice(bool updateMatrixClip) const { |
| if (updateMatrixClip) { |
| const_cast<SkCanvas*>(this)->updateDeviceCMCache(); |
| } |
| return fMCRec->fTopLayer->fDevice; |
| } |
| |
| SkBaseDevice* SkCanvas::setRootDevice(SkBaseDevice* device) { |
| // return root device |
| SkDeque::F2BIter iter(fMCStack); |
| MCRec* rec = (MCRec*)iter.next(); |
| SkASSERT(rec && rec->fLayer); |
| SkBaseDevice* rootDevice = rec->fLayer->fDevice; |
| |
| if (rootDevice == device) { |
| return device; |
| } |
| |
| if (device) { |
| device->onAttachToCanvas(this); |
| } |
| if (rootDevice) { |
| rootDevice->onDetachFromCanvas(); |
| } |
| |
| SkRefCnt_SafeAssign(rec->fLayer->fDevice, device); |
| rootDevice = device; |
| |
| fDeviceCMDirty = true; |
| |
| /* Now we update our initial region to have the bounds of the new device, |
| and then intersect all of the clips in our stack with these bounds, |
| to ensure that we can't draw outside of the device's bounds (and trash |
| memory). |
| |
| NOTE: this is only a partial-fix, since if the new device is larger than |
| the previous one, we don't know how to "enlarge" the clips in our stack, |
| so drawing may be artificially restricted. Without keeping a history of |
| all calls to canvas->clipRect() and canvas->clipPath(), we can't exactly |
| reconstruct the correct clips, so this approximation will have to do. |
| The caller really needs to restore() back to the base if they want to |
| accurately take advantage of the new device bounds. |
| */ |
| |
| SkIRect bounds; |
| if (device) { |
| bounds.set(0, 0, device->width(), device->height()); |
| } else { |
| bounds.setEmpty(); |
| } |
| // now jam our 1st clip to be bounds, and intersect the rest with that |
| rec->fRasterClip->setRect(bounds); |
| while ((rec = (MCRec*)iter.next()) != NULL) { |
| (void)rec->fRasterClip->op(bounds, SkRegion::kIntersect_Op); |
| } |
| |
| return device; |
| } |
| |
| bool SkCanvas::readPixels(SkBitmap* bitmap, int x, int y) { |
| if (kUnknown_SkColorType == bitmap->colorType() || bitmap->getTexture()) { |
| return false; |
| } |
| |
| bool weAllocated = false; |
| if (NULL == bitmap->pixelRef()) { |
| if (!bitmap->allocPixels()) { |
| return false; |
| } |
| weAllocated = true; |
| } |
| |
| SkBitmap bm(*bitmap); |
| bm.lockPixels(); |
| if (bm.getPixels() && this->readPixels(bm.info(), bm.getPixels(), bm.rowBytes(), x, y)) { |
| return true; |
| } |
| |
| if (weAllocated) { |
| bitmap->setPixelRef(NULL); |
| } |
| return false; |
| } |
| |
| bool SkCanvas::readPixels(const SkIRect& srcRect, SkBitmap* bitmap) { |
| SkIRect r = srcRect; |
| const SkISize size = this->getBaseLayerSize(); |
| if (!r.intersect(0, 0, size.width(), size.height())) { |
| bitmap->reset(); |
| return false; |
| } |
| |
| if (!bitmap->allocN32Pixels(r.width(), r.height())) { |
| // bitmap will already be reset. |
| return false; |
| } |
| if (!this->readPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), r.x(), r.y())) { |
| bitmap->reset(); |
| return false; |
| } |
| return true; |
| } |
| |
| bool SkCanvas::readPixels(const SkImageInfo& origInfo, void* dstP, size_t rowBytes, int x, int y) { |
| switch (origInfo.colorType()) { |
| case kUnknown_SkColorType: |
| case kIndex_8_SkColorType: |
| return false; |
| default: |
| break; |
| } |
| if (NULL == dstP || rowBytes < origInfo.minRowBytes()) { |
| return false; |
| } |
| if (0 == origInfo.width() || 0 == origInfo.height()) { |
| return false; |
| } |
| |
| SkBaseDevice* device = this->getDevice(); |
| if (!device) { |
| return false; |
| } |
| |
| const SkISize size = this->getBaseLayerSize(); |
| SkIRect srcR = SkIRect::MakeXYWH(x, y, origInfo.width(), origInfo.height()); |
| if (!srcR.intersect(0, 0, size.width(), size.height())) { |
| return false; |
| } |
| |
| SkImageInfo info = origInfo; |
| // the intersect may have shrunk info's logical size |
| info.fWidth = srcR.width(); |
| info.fHeight = srcR.height(); |
| |
| // if x or y are negative, then we have to adjust pixels |
| if (x > 0) { |
| x = 0; |
| } |
| if (y > 0) { |
| y = 0; |
| } |
| // here x,y are either 0 or negative |
| dstP = ((char*)dstP - y * rowBytes - x * info.bytesPerPixel()); |
| |
| // The device can assert that the requested area is always contained in its bounds |
| return device->readPixels(info, dstP, rowBytes, srcR.x(), srcR.y()); |
| } |
| |
| bool SkCanvas::writePixels(const SkBitmap& bitmap, int x, int y) { |
| if (bitmap.getTexture()) { |
| return false; |
| } |
| SkBitmap bm(bitmap); |
| bm.lockPixels(); |
| if (bm.getPixels()) { |
| return this->writePixels(bm.info(), bm.getPixels(), bm.rowBytes(), x, y); |
| } |
| return false; |
| } |
| |
| bool SkCanvas::writePixels(const SkImageInfo& origInfo, const void* pixels, size_t rowBytes, |
| int x, int y) { |
| switch (origInfo.colorType()) { |
| case kUnknown_SkColorType: |
| case kIndex_8_SkColorType: |
| return false; |
| default: |
| break; |
| } |
| if (NULL == pixels || rowBytes < origInfo.minRowBytes()) { |
| return false; |
| } |
| |
| const SkISize size = this->getBaseLayerSize(); |
| SkIRect target = SkIRect::MakeXYWH(x, y, origInfo.width(), origInfo.height()); |
| if (!target.intersect(0, 0, size.width(), size.height())) { |
| return false; |
| } |
| |
| SkBaseDevice* device = this->getDevice(); |
| if (!device) { |
| return false; |
| } |
| |
| SkImageInfo info = origInfo; |
| // the intersect may have shrunk info's logical size |
| info.fWidth = target.width(); |
| info.fHeight = target.height(); |
| |
| // if x or y are negative, then we have to adjust pixels |
| if (x > 0) { |
| x = 0; |
| } |
| if (y > 0) { |
| y = 0; |
| } |
| // here x,y are either 0 or negative |
| pixels = ((const char*)pixels - y * rowBytes - x * info.bytesPerPixel()); |
| |
| // The device can assert that the requested area is always contained in its bounds |
| return device->writePixels(info, pixels, rowBytes, target.x(), target.y()); |
| } |
| |
| SkCanvas* SkCanvas::canvasForDrawIter() { |
| return this; |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::updateDeviceCMCache() { |
| if (fDeviceCMDirty) { |
| const SkMatrix& totalMatrix = this->getTotalMatrix(); |
| const SkRasterClip& totalClip = *fMCRec->fRasterClip; |
| DeviceCM* layer = fMCRec->fTopLayer; |
| |
| if (NULL == layer->fNext) { // only one layer |
| layer->updateMC(totalMatrix, totalClip, fClipStack, NULL); |
| } else { |
| SkRasterClip clip(totalClip); |
| do { |
| layer->updateMC(totalMatrix, clip, fClipStack, &clip); |
| } while ((layer = layer->fNext) != NULL); |
| } |
| fDeviceCMDirty = false; |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| int SkCanvas::internalSave(SaveFlags flags) { |
| int saveCount = this->getSaveCount(); // record this before the actual save |
| |
| MCRec* newTop = (MCRec*)fMCStack.push_back(); |
| new (newTop) MCRec(fMCRec, flags); // balanced in restore() |
| |
| fMCRec = newTop; |
| |
| if (SkCanvas::kClip_SaveFlag & flags) { |
| fClipStack.save(); |
| } |
| |
| return saveCount; |
| } |
| |
| void SkCanvas::willSave(SaveFlags) { |
| // Do nothing. Subclasses may do something. |
| } |
| |
| int SkCanvas::save(SaveFlags flags) { |
| this->willSave(flags); |
| // call shared impl |
| return this->internalSave(flags); |
| } |
| |
| static bool bounds_affects_clip(SkCanvas::SaveFlags flags) { |
| #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG |
| return (flags & SkCanvas::kClipToLayer_SaveFlag) != 0; |
| #else |
| return true; |
| #endif |
| } |
| |
| bool SkCanvas::clipRectBounds(const SkRect* bounds, SaveFlags flags, |
| SkIRect* intersection, const SkImageFilter* imageFilter) { |
| SkIRect clipBounds; |
| SkRegion::Op op = SkRegion::kIntersect_Op; |
| if (!this->getClipDeviceBounds(&clipBounds)) { |
| return false; |
| } |
| |
| if (imageFilter) { |
| imageFilter->filterBounds(clipBounds, *fMCRec->fMatrix, &clipBounds); |
| // Filters may grow the bounds beyond the device bounds. |
| op = SkRegion::kReplace_Op; |
| } |
| SkIRect ir; |
| if (NULL != bounds) { |
| SkRect r; |
| |
| this->getTotalMatrix().mapRect(&r, *bounds); |
| r.roundOut(&ir); |
| // early exit if the layer's bounds are clipped out |
| if (!ir.intersect(clipBounds)) { |
| if (bounds_affects_clip(flags)) { |
| fMCRec->fRasterClip->setEmpty(); |
| } |
| return false; |
| } |
| } else { // no user bounds, so just use the clip |
| ir = clipBounds; |
| } |
| |
| if (bounds_affects_clip(flags)) { |
| fClipStack.clipDevRect(ir, op); |
| // early exit if the clip is now empty |
| if (!fMCRec->fRasterClip->op(ir, op)) { |
| return false; |
| } |
| } |
| |
| if (intersection) { |
| *intersection = ir; |
| } |
| return true; |
| } |
| |
| SkCanvas::SaveLayerStrategy SkCanvas::willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) { |
| |
| // Do nothing. Subclasses may do something. |
| return kFullLayer_SaveLayerStrategy; |
| } |
| |
| int SkCanvas::saveLayer(const SkRect* bounds, const SkPaint* paint, |
| SaveFlags flags) { |
| // Overriding classes may return false to signal that we don't need to create a layer. |
| SaveLayerStrategy strategy = this->willSaveLayer(bounds, paint, flags); |
| return this->internalSaveLayer(bounds, paint, flags, false, strategy); |
| } |
| |
| static SkBaseDevice* create_compatible_device(SkCanvas* canvas, |
| const SkImageInfo& info) { |
| SkBaseDevice* device = canvas->getDevice(); |
| return device ? device->createCompatibleDevice(info) : NULL; |
| } |
| |
| int SkCanvas::internalSaveLayer(const SkRect* bounds, const SkPaint* paint, SaveFlags flags, |
| bool justForImageFilter, SaveLayerStrategy strategy) { |
| #ifndef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG |
| flags = (SaveFlags)(flags | kClipToLayer_SaveFlag); |
| #endif |
| |
| // do this before we create the layer. We don't call the public save() since |
| // that would invoke a possibly overridden virtual |
| int count = this->internalSave(flags); |
| |
| fDeviceCMDirty = true; |
| |
| SkIRect ir; |
| if (!this->clipRectBounds(bounds, flags, &ir, paint ? paint->getImageFilter() : NULL)) { |
| return count; |
| } |
| |
| // FIXME: do willSaveLayer() overriders returning kNoLayer_SaveLayerStrategy really care about |
| // the clipRectBounds() call above? |
| if (kNoLayer_SaveLayerStrategy == strategy) { |
| return count; |
| } |
| |
| // Kill the imagefilter if our device doesn't allow it |
| SkLazyPaint lazyP; |
| if (paint && paint->getImageFilter()) { |
| if (!this->getTopDevice()->allowImageFilter(paint->getImageFilter())) { |
| if (justForImageFilter) { |
| // early exit if the layer was just for the imageFilter |
| return count; |
| } |
| SkPaint* p = lazyP.set(*paint); |
| p->setImageFilter(NULL); |
| paint = p; |
| } |
| } |
| |
| bool isOpaque = !SkToBool(flags & kHasAlphaLayer_SaveFlag); |
| SkImageInfo info = SkImageInfo::MakeN32(ir.width(), ir.height(), |
| isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType); |
| |
| SkBaseDevice* device; |
| if (paint && paint->getImageFilter()) { |
| device = create_compatible_device(this, info); |
| } else { |
| device = this->createLayerDevice(info); |
| } |
| if (NULL == device) { |
| SkDebugf("Unable to create device for layer."); |
| return count; |
| } |
| |
| device->setOrigin(ir.fLeft, ir.fTop); |
| DeviceCM* layer = SkNEW_ARGS(DeviceCM, (device, ir.fLeft, ir.fTop, paint, this)); |
| device->unref(); |
| |
| layer->fNext = fMCRec->fTopLayer; |
| fMCRec->fLayer = layer; |
| fMCRec->fTopLayer = layer; // this field is NOT an owner of layer |
| |
| fSaveLayerCount += 1; |
| return count; |
| } |
| |
| int SkCanvas::saveLayerAlpha(const SkRect* bounds, U8CPU alpha, |
| SaveFlags flags) { |
| if (0xFF == alpha) { |
| return this->saveLayer(bounds, NULL, flags); |
| } else { |
| SkPaint tmpPaint; |
| tmpPaint.setAlpha(alpha); |
| return this->saveLayer(bounds, &tmpPaint, flags); |
| } |
| } |
| |
| void SkCanvas::willRestore() { |
| // Do nothing. Subclasses may do something. |
| } |
| |
| void SkCanvas::restore() { |
| // check for underflow |
| if (fMCStack.count() > 1) { |
| this->willRestore(); |
| this->internalRestore(); |
| } |
| } |
| |
| void SkCanvas::internalRestore() { |
| SkASSERT(fMCStack.count() != 0); |
| |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| |
| if (SkCanvas::kClip_SaveFlag & fMCRec->fFlags) { |
| fClipStack.restore(); |
| } |
| |
| // reserve our layer (if any) |
| DeviceCM* layer = fMCRec->fLayer; // may be null |
| // now detach it from fMCRec so we can pop(). Gets freed after its drawn |
| fMCRec->fLayer = NULL; |
| |
| // now do the normal restore() |
| fMCRec->~MCRec(); // balanced in save() |
| fMCStack.pop_back(); |
| fMCRec = (MCRec*)fMCStack.back(); |
| |
| /* Time to draw the layer's offscreen. We can't call the public drawSprite, |
| since if we're being recorded, we don't want to record this (the |
| recorder will have already recorded the restore). |
| */ |
| if (NULL != layer) { |
| if (layer->fNext) { |
| const SkIPoint& origin = layer->fDevice->getOrigin(); |
| this->internalDrawDevice(layer->fDevice, origin.x(), origin.y(), |
| layer->fPaint); |
| // reset this, since internalDrawDevice will have set it to true |
| fDeviceCMDirty = true; |
| |
| SkASSERT(fSaveLayerCount > 0); |
| fSaveLayerCount -= 1; |
| } |
| SkDELETE(layer); |
| } |
| } |
| |
| int SkCanvas::getSaveCount() const { |
| return fMCStack.count(); |
| } |
| |
| void SkCanvas::restoreToCount(int count) { |
| // sanity check |
| if (count < 1) { |
| count = 1; |
| } |
| |
| int n = this->getSaveCount() - count; |
| for (int i = 0; i < n; ++i) { |
| this->restore(); |
| } |
| } |
| |
| bool SkCanvas::isDrawingToLayer() const { |
| return fSaveLayerCount > 0; |
| } |
| |
| SkSurface* SkCanvas::newSurface(const SkImageInfo& info) { |
| return this->onNewSurface(info); |
| } |
| |
| SkSurface* SkCanvas::onNewSurface(const SkImageInfo& info) { |
| SkBaseDevice* dev = this->getDevice(); |
| return dev ? dev->newSurface(info) : NULL; |
| } |
| |
| SkImageInfo SkCanvas::imageInfo() const { |
| SkBaseDevice* dev = this->getDevice(); |
| if (dev) { |
| return dev->imageInfo(); |
| } else { |
| return SkImageInfo::MakeUnknown(0, 0); |
| } |
| } |
| |
| const void* SkCanvas::peekPixels(SkImageInfo* info, size_t* rowBytes) { |
| return this->onPeekPixels(info, rowBytes); |
| } |
| |
| const void* SkCanvas::onPeekPixels(SkImageInfo* info, size_t* rowBytes) { |
| SkBaseDevice* dev = this->getDevice(); |
| return dev ? dev->peekPixels(info, rowBytes) : NULL; |
| } |
| |
| void* SkCanvas::accessTopLayerPixels(SkImageInfo* info, size_t* rowBytes, SkIPoint* origin) { |
| void* pixels = this->onAccessTopLayerPixels(info, rowBytes); |
| if (pixels && origin) { |
| *origin = this->getTopDevice(false)->getOrigin(); |
| } |
| return pixels; |
| } |
| |
| void* SkCanvas::onAccessTopLayerPixels(SkImageInfo* info, size_t* rowBytes) { |
| SkBaseDevice* dev = this->getTopDevice(); |
| return dev ? dev->accessPixels(info, rowBytes) : NULL; |
| } |
| |
| SkAutoROCanvasPixels::SkAutoROCanvasPixels(SkCanvas* canvas) { |
| fAddr = canvas->peekPixels(&fInfo, &fRowBytes); |
| if (NULL == fAddr) { |
| fInfo = canvas->imageInfo(); |
| if (kUnknown_SkColorType == fInfo.colorType() || !fBitmap.allocPixels(fInfo)) { |
| return; // failure, fAddr is NULL |
| } |
| if (!canvas->readPixels(&fBitmap, 0, 0)) { |
| return; // failure, fAddr is NULL |
| } |
| fAddr = fBitmap.getPixels(); |
| fRowBytes = fBitmap.rowBytes(); |
| } |
| SkASSERT(fAddr); // success |
| } |
| |
| bool SkAutoROCanvasPixels::asROBitmap(SkBitmap* bitmap) const { |
| if (fAddr) { |
| return bitmap->installPixels(fInfo, const_cast<void*>(fAddr), fRowBytes, |
| NULL, NULL); |
| } else { |
| bitmap->reset(); |
| return false; |
| } |
| } |
| |
| void SkCanvas::onPushCull(const SkRect& cullRect) { |
| // do nothing. Subclasses may do something |
| } |
| |
| void SkCanvas::onPopCull() { |
| // do nothing. Subclasses may do something |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| #ifdef SK_DEBUG |
| // Ensure that cull rects are monotonically nested in device space. |
| void SkCanvas::validateCull(const SkIRect& devCull) { |
| if (fCullStack.isEmpty() |
| || devCull.isEmpty() |
| || fCullStack.top().contains(devCull)) { |
| return; |
| } |
| |
| SkDEBUGF(("Invalid cull: [%d %d %d %d] (previous cull: [%d %d %d %d])\n", |
| devCull.x(), devCull.y(), devCull.right(), devCull.bottom(), |
| fCullStack.top().x(), fCullStack.top().y(), |
| fCullStack.top().right(), fCullStack.top().bottom())); |
| |
| #ifdef ASSERT_NESTED_CULLING |
| SkDEBUGFAIL("Invalid cull."); |
| #endif |
| } |
| #endif |
| |
| void SkCanvas::pushCull(const SkRect& cullRect) { |
| ++fCullCount; |
| this->onPushCull(cullRect); |
| |
| #ifdef SK_DEBUG |
| // Map the cull rect into device space. |
| SkRect mappedCull; |
| this->getTotalMatrix().mapRect(&mappedCull, cullRect); |
| |
| // Take clipping into account. |
| SkIRect devClip, devCull; |
| mappedCull.roundOut(&devCull); |
| this->getClipDeviceBounds(&devClip); |
| if (!devCull.intersect(devClip)) { |
| devCull.setEmpty(); |
| } |
| |
| this->validateCull(devCull); |
| fCullStack.push(devCull); // balanced in popCull |
| #endif |
| } |
| |
| void SkCanvas::popCull() { |
| SkASSERT(fCullStack.count() == fCullCount); |
| |
| if (fCullCount > 0) { |
| --fCullCount; |
| this->onPopCull(); |
| |
| SkDEBUGCODE(fCullStack.pop()); |
| } |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap, |
| const SkMatrix& matrix, const SkPaint* paint) { |
| if (bitmap.drawsNothing()) { |
| return; |
| } |
| |
| SkLazyPaint lazy; |
| if (NULL == paint) { |
| paint = lazy.init(); |
| } |
| |
| SkDEBUGCODE(bitmap.validate();) |
| CHECK_LOCKCOUNT_BALANCE(bitmap); |
| |
| SkRect storage; |
| const SkRect* bounds = NULL; |
| if (paint && paint->canComputeFastBounds()) { |
| bitmap.getBounds(&storage); |
| matrix.mapRect(&storage); |
| bounds = &paint->computeFastBounds(storage, &storage); |
| } |
| |
| LOOPER_BEGIN(*paint, SkDrawFilter::kBitmap_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawBitmap(iter, bitmap, matrix, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::internalDrawDevice(SkBaseDevice* srcDev, int x, int y, |
| const SkPaint* paint) { |
| SkPaint tmp; |
| if (NULL == paint) { |
| tmp.setDither(true); |
| paint = &tmp; |
| } |
| |
| LOOPER_BEGIN_DRAWDEVICE(*paint, SkDrawFilter::kBitmap_Type) |
| while (iter.next()) { |
| SkBaseDevice* dstDev = iter.fDevice; |
| paint = &looper.paint(); |
| SkImageFilter* filter = paint->getImageFilter(); |
| SkIPoint pos = { x - iter.getX(), y - iter.getY() }; |
| if (filter && !dstDev->canHandleImageFilter(filter)) { |
| SkDeviceImageFilterProxy proxy(dstDev); |
| SkBitmap dst; |
| SkIPoint offset = SkIPoint::Make(0, 0); |
| const SkBitmap& src = srcDev->accessBitmap(false); |
| SkMatrix matrix = *iter.fMatrix; |
| matrix.postTranslate(SkIntToScalar(-pos.x()), SkIntToScalar(-pos.y())); |
| SkIRect clipBounds = SkIRect::MakeWH(srcDev->width(), srcDev->height()); |
| SkImageFilter::Cache* cache = SkImageFilter::GetExternalCache(); |
| SkAutoUnref aur(NULL); |
| if (!cache) { |
| cache = SkImageFilter::Cache::Create(); |
| aur.reset(cache); |
| } |
| SkImageFilter::Context ctx(matrix, clipBounds, cache); |
| if (filter->filterImage(&proxy, src, ctx, &dst, &offset)) { |
| SkPaint tmpUnfiltered(*paint); |
| tmpUnfiltered.setImageFilter(NULL); |
| dstDev->drawSprite(iter, dst, pos.x() + offset.x(), pos.y() + offset.y(), |
| tmpUnfiltered); |
| } |
| } else { |
| dstDev->drawDevice(iter, srcDev, pos.x(), pos.y(), *paint); |
| } |
| } |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawSprite(const SkBitmap& bitmap, int x, int y, |
| const SkPaint* paint) { |
| if (bitmap.drawsNothing()) { |
| return; |
| } |
| SkDEBUGCODE(bitmap.validate();) |
| CHECK_LOCKCOUNT_BALANCE(bitmap); |
| |
| SkPaint tmp; |
| if (NULL == paint) { |
| paint = &tmp; |
| } |
| |
| LOOPER_BEGIN_DRAWDEVICE(*paint, SkDrawFilter::kBitmap_Type) |
| |
| while (iter.next()) { |
| paint = &looper.paint(); |
| SkImageFilter* filter = paint->getImageFilter(); |
| SkIPoint pos = { x - iter.getX(), y - iter.getY() }; |
| if (filter && !iter.fDevice->canHandleImageFilter(filter)) { |
| SkDeviceImageFilterProxy proxy(iter.fDevice); |
| SkBitmap dst; |
| SkIPoint offset = SkIPoint::Make(0, 0); |
| SkMatrix matrix = *iter.fMatrix; |
| matrix.postTranslate(SkIntToScalar(-pos.x()), SkIntToScalar(-pos.y())); |
| SkIRect clipBounds = SkIRect::MakeWH(bitmap.width(), bitmap.height()); |
| SkImageFilter::Cache* cache = SkImageFilter::GetExternalCache(); |
| SkAutoUnref aur(NULL); |
| if (!cache) { |
| cache = SkImageFilter::Cache::Create(); |
| aur.reset(cache); |
| } |
| SkImageFilter::Context ctx(matrix, clipBounds, cache); |
| if (filter->filterImage(&proxy, bitmap, ctx, &dst, &offset)) { |
| SkPaint tmpUnfiltered(*paint); |
| tmpUnfiltered.setImageFilter(NULL); |
| iter.fDevice->drawSprite(iter, dst, pos.x() + offset.x(), pos.y() + offset.y(), |
| tmpUnfiltered); |
| } |
| } else { |
| iter.fDevice->drawSprite(iter, bitmap, pos.x(), pos.y(), *paint); |
| } |
| } |
| LOOPER_END |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| void SkCanvas::translate(SkScalar dx, SkScalar dy) { |
| SkMatrix m; |
| m.setTranslate(dx, dy); |
| this->concat(m); |
| } |
| |
| void SkCanvas::scale(SkScalar sx, SkScalar sy) { |
| SkMatrix m; |
| m.setScale(sx, sy); |
| this->concat(m); |
| } |
| |
| void SkCanvas::rotate(SkScalar degrees) { |
| SkMatrix m; |
| m.setRotate(degrees); |
| this->concat(m); |
| } |
| |
| void SkCanvas::skew(SkScalar sx, SkScalar sy) { |
| SkMatrix m; |
| m.setSkew(sx, sy); |
| this->concat(m); |
| } |
| |
| void SkCanvas::didConcat(const SkMatrix&) { |
| // Do nothing. Subclasses may do something. |
| } |
| |
| void SkCanvas::concat(const SkMatrix& matrix) { |
| if (matrix.isIdentity()) { |
| return; |
| } |
| |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| fMCRec->fMatrix->preConcat(matrix); |
| |
| this->didConcat(matrix); |
| } |
| |
| void SkCanvas::didSetMatrix(const SkMatrix&) { |
| // Do nothing. Subclasses may do something. |
| } |
| |
| void SkCanvas::setMatrix(const SkMatrix& matrix) { |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| *fMCRec->fMatrix = matrix; |
| this->didSetMatrix(matrix); |
| } |
| |
| void SkCanvas::resetMatrix() { |
| SkMatrix matrix; |
| |
| matrix.reset(); |
| this->setMatrix(matrix); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::clipRect(const SkRect& rect, SkRegion::Op op, bool doAA) { |
| ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; |
| this->onClipRect(rect, op, edgeStyle); |
| } |
| |
| void SkCanvas::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { |
| #ifdef SK_ENABLE_CLIP_QUICKREJECT |
| if (SkRegion::kIntersect_Op == op) { |
| if (fMCRec->fRasterClip->isEmpty()) { |
| return false; |
| } |
| |
| if (this->quickReject(rect)) { |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| |
| fClipStack.clipEmpty(); |
| return fMCRec->fRasterClip->setEmpty(); |
| } |
| } |
| #endif |
| |
| AutoValidateClip avc(this); |
| |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| if (!fAllowSoftClip) { |
| edgeStyle = kHard_ClipEdgeStyle; |
| } |
| |
| if (fMCRec->fMatrix->rectStaysRect()) { |
| // for these simpler matrices, we can stay a rect even after applying |
| // the matrix. This means we don't have to a) make a path, and b) tell |
| // the region code to scan-convert the path, only to discover that it |
| // is really just a rect. |
| SkRect r; |
| |
| fMCRec->fMatrix->mapRect(&r, rect); |
| fClipStack.clipDevRect(r, op, kSoft_ClipEdgeStyle == edgeStyle); |
| fMCRec->fRasterClip->op(r, op, kSoft_ClipEdgeStyle == edgeStyle); |
| } else { |
| // since we're rotated or some such thing, we convert the rect to a path |
| // and clip against that, since it can handle any matrix. However, to |
| // avoid recursion in the case where we are subclassed (e.g. Pictures) |
| // we explicitly call "our" version of clipPath. |
| SkPath path; |
| |
| path.addRect(rect); |
| this->SkCanvas::onClipPath(path, op, edgeStyle); |
| } |
| } |
| |
| static void clip_path_helper(const SkCanvas* canvas, SkRasterClip* currClip, |
| const SkPath& devPath, SkRegion::Op op, bool doAA) { |
| // base is used to limit the size (and therefore memory allocation) of the |
| // region that results from scan converting devPath. |
| SkRegion base; |
| |
| if (SkRegion::kIntersect_Op == op) { |
| // since we are intersect, we can do better (tighter) with currRgn's |
| // bounds, than just using the device. However, if currRgn is complex, |
| // our region blitter may hork, so we do that case in two steps. |
| if (currClip->isRect()) { |
| // FIXME: we should also be able to do this when currClip->isBW(), |
| // but relaxing the test above triggers GM asserts in |
| // SkRgnBuilder::blitH(). We need to investigate what's going on. |
| currClip->setPath(devPath, currClip->bwRgn(), doAA); |
| } else { |
| base.setRect(currClip->getBounds()); |
| SkRasterClip clip; |
| clip.setPath(devPath, base, doAA); |
| currClip->op(clip, op); |
| } |
| } else { |
| const SkBaseDevice* device = canvas->getDevice(); |
| if (!device) { |
| currClip->setEmpty(); |
| return; |
| } |
| |
| base.setRect(0, 0, device->width(), device->height()); |
| |
| if (SkRegion::kReplace_Op == op) { |
| currClip->setPath(devPath, base, doAA); |
| } else { |
| SkRasterClip clip; |
| clip.setPath(devPath, base, doAA); |
| currClip->op(clip, op); |
| } |
| } |
| } |
| |
| void SkCanvas::clipRRect(const SkRRect& rrect, SkRegion::Op op, bool doAA) { |
| ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; |
| if (rrect.isRect()) { |
| this->onClipRect(rrect.getBounds(), op, edgeStyle); |
| } else { |
| this->onClipRRect(rrect, op, edgeStyle); |
| } |
| } |
| |
| void SkCanvas::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { |
| SkRRect transformedRRect; |
| if (rrect.transform(*fMCRec->fMatrix, &transformedRRect)) { |
| AutoValidateClip avc(this); |
| |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| if (!fAllowSoftClip) { |
| edgeStyle = kHard_ClipEdgeStyle; |
| } |
| |
| fClipStack.clipDevRRect(transformedRRect, op, kSoft_ClipEdgeStyle == edgeStyle); |
| |
| SkPath devPath; |
| devPath.addRRect(transformedRRect); |
| |
| clip_path_helper(this, fMCRec->fRasterClip, devPath, op, kSoft_ClipEdgeStyle == edgeStyle); |
| return; |
| } |
| |
| SkPath path; |
| path.addRRect(rrect); |
| // call the non-virtual version |
| this->SkCanvas::onClipPath(path, op, edgeStyle); |
| } |
| |
| void SkCanvas::clipPath(const SkPath& path, SkRegion::Op op, bool doAA) { |
| ClipEdgeStyle edgeStyle = doAA ? kSoft_ClipEdgeStyle : kHard_ClipEdgeStyle; |
| SkRect r; |
| if (!path.isInverseFillType() && path.isRect(&r)) { |
| this->onClipRect(r, op, edgeStyle); |
| } else { |
| this->onClipPath(path, op, edgeStyle); |
| } |
| } |
| |
| void SkCanvas::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) { |
| #ifdef SK_ENABLE_CLIP_QUICKREJECT |
| if (SkRegion::kIntersect_Op == op && !path.isInverseFillType()) { |
| if (fMCRec->fRasterClip->isEmpty()) { |
| return false; |
| } |
| |
| if (this->quickReject(path.getBounds())) { |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| |
| fClipStack.clipEmpty(); |
| return fMCRec->fRasterClip->setEmpty(); |
| } |
| } |
| #endif |
| |
| AutoValidateClip avc(this); |
| |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| if (!fAllowSoftClip) { |
| edgeStyle = kHard_ClipEdgeStyle; |
| } |
| |
| SkPath devPath; |
| path.transform(*fMCRec->fMatrix, &devPath); |
| |
| // Check if the transfomation, or the original path itself |
| // made us empty. Note this can also happen if we contained NaN |
| // values. computing the bounds detects this, and will set our |
| // bounds to empty if that is the case. (see SkRect::set(pts, count)) |
| if (devPath.getBounds().isEmpty()) { |
| // resetting the path will remove any NaN or other wanky values |
| // that might upset our scan converter. |
| devPath.reset(); |
| } |
| |
| // if we called path.swap() we could avoid a deep copy of this path |
| fClipStack.clipDevPath(devPath, op, kSoft_ClipEdgeStyle == edgeStyle); |
| |
| if (fAllowSimplifyClip) { |
| devPath.reset(); |
| devPath.setFillType(SkPath::kInverseEvenOdd_FillType); |
| const SkClipStack* clipStack = getClipStack(); |
| SkClipStack::Iter iter(*clipStack, SkClipStack::Iter::kBottom_IterStart); |
| const SkClipStack::Element* element; |
| while ((element = iter.next())) { |
| SkClipStack::Element::Type type = element->getType(); |
| if (type == SkClipStack::Element::kEmpty_Type) { |
| continue; |
| } |
| SkPath operand; |
| element->asPath(&operand); |
| SkRegion::Op elementOp = element->getOp(); |
| if (elementOp == SkRegion::kReplace_Op) { |
| devPath = operand; |
| } else { |
| Op(devPath, operand, (SkPathOp) elementOp, &devPath); |
| } |
| // if the prev and curr clips disagree about aa -vs- not, favor the aa request. |
| // perhaps we need an API change to avoid this sort of mixed-signals about |
| // clipping. |
| if (element->isAA()) { |
| edgeStyle = kSoft_ClipEdgeStyle; |
| } |
| } |
| op = SkRegion::kReplace_Op; |
| } |
| |
| clip_path_helper(this, fMCRec->fRasterClip, devPath, op, edgeStyle); |
| } |
| |
| void SkCanvas::updateClipConservativelyUsingBounds(const SkRect& bounds, SkRegion::Op op, |
| bool inverseFilled) { |
| // This is for updating the clip conservatively using only bounds |
| // information. |
| // Contract: |
| // The current clip must contain the true clip. The true |
| // clip is the clip that would have normally been computed |
| // by calls to clipPath and clipRRect |
| // Objective: |
| // Keep the current clip as small as possible without |
| // breaking the contract, using only clip bounding rectangles |
| // (for performance). |
| |
| // N.B.: This *never* calls back through a virtual on canvas, so subclasses |
| // don't have to worry about getting caught in a loop. Thus anywhere |
| // we call a virtual method, we explicitly prefix it with |
| // SkCanvas:: to be sure to call the base-class. |
| |
| if (inverseFilled) { |
| switch (op) { |
| case SkRegion::kIntersect_Op: |
| case SkRegion::kDifference_Op: |
| // These ops can only shrink the current clip. So leaving |
| // the clip unchanged conservatively respects the contract. |
| break; |
| case SkRegion::kUnion_Op: |
| case SkRegion::kReplace_Op: |
| case SkRegion::kReverseDifference_Op: |
| case SkRegion::kXOR_Op: { |
| // These ops can grow the current clip up to the extents of |
| // the input clip, which is inverse filled, so we just set |
| // the current clip to the device bounds. |
| SkRect deviceBounds; |
| SkIRect deviceIBounds; |
| this->getDevice()->getGlobalBounds(&deviceIBounds); |
| deviceBounds = SkRect::Make(deviceIBounds); |
| |
| // set the clip in device space |
| SkMatrix savedMatrix = this->getTotalMatrix(); |
| this->SkCanvas::setMatrix(SkMatrix::I()); |
| this->SkCanvas::onClipRect(deviceBounds, SkRegion::kReplace_Op, |
| kHard_ClipEdgeStyle); |
| this->setMatrix(savedMatrix); |
| break; |
| } |
| default: |
| SkASSERT(0); // unhandled op? |
| } |
| } else { |
| // Not inverse filled |
| switch (op) { |
| case SkRegion::kIntersect_Op: |
| case SkRegion::kUnion_Op: |
| case SkRegion::kReplace_Op: |
| this->SkCanvas::onClipRect(bounds, op, kHard_ClipEdgeStyle); |
| break; |
| case SkRegion::kDifference_Op: |
| // Difference can only shrink the current clip. |
| // Leaving clip unchanged conservatively fullfills the contract. |
| break; |
| case SkRegion::kReverseDifference_Op: |
| // To reverse, we swap in the bounds with a replace op. |
| // As with difference, leave it unchanged. |
| this->SkCanvas::onClipRect(bounds, SkRegion::kReplace_Op, kHard_ClipEdgeStyle); |
| break; |
| case SkRegion::kXOR_Op: |
| // Be conservative, based on (A XOR B) always included in (A union B), |
| // which is always included in (bounds(A) union bounds(B)) |
| this->SkCanvas::onClipRect(bounds, SkRegion::kUnion_Op, kHard_ClipEdgeStyle); |
| break; |
| default: |
| SkASSERT(0); // unhandled op? |
| } |
| } |
| } |
| |
| void SkCanvas::clipRegion(const SkRegion& rgn, SkRegion::Op op) { |
| this->onClipRegion(rgn, op); |
| } |
| |
| void SkCanvas::onClipRegion(const SkRegion& rgn, SkRegion::Op op) { |
| AutoValidateClip avc(this); |
| |
| fDeviceCMDirty = true; |
| fCachedLocalClipBoundsDirty = true; |
| |
| // todo: signal fClipStack that we have a region, and therefore (I guess) |
| // we have to ignore it, and use the region directly? |
| fClipStack.clipDevRect(rgn.getBounds(), op); |
| |
| fMCRec->fRasterClip->op(rgn, op); |
| } |
| |
| #ifdef SK_DEBUG |
| void SkCanvas::validateClip() const { |
| // construct clipRgn from the clipstack |
| const SkBaseDevice* device = this->getDevice(); |
| if (!device) { |
| SkASSERT(this->isClipEmpty()); |
| return; |
| } |
| |
| SkIRect ir; |
| ir.set(0, 0, device->width(), device->height()); |
| SkRasterClip tmpClip(ir); |
| |
| SkClipStack::B2TIter iter(fClipStack); |
| const SkClipStack::Element* element; |
| while ((element = iter.next()) != NULL) { |
| switch (element->getType()) { |
| case SkClipStack::Element::kRect_Type: |
| element->getRect().round(&ir); |
| tmpClip.op(ir, element->getOp()); |
| break; |
| case SkClipStack::Element::kEmpty_Type: |
| tmpClip.setEmpty(); |
| break; |
| default: { |
| SkPath path; |
| element->asPath(&path); |
| clip_path_helper(this, &tmpClip, path, element->getOp(), element->isAA()); |
| break; |
| } |
| } |
| } |
| } |
| #endif |
| |
| void SkCanvas::replayClips(ClipVisitor* visitor) const { |
| SkClipStack::B2TIter iter(fClipStack); |
| const SkClipStack::Element* element; |
| |
| static const SkRect kEmpty = { 0, 0, 0, 0 }; |
| while ((element = iter.next()) != NULL) { |
| switch (element->getType()) { |
| case SkClipStack::Element::kPath_Type: |
| visitor->clipPath(element->getPath(), element->getOp(), element->isAA()); |
| break; |
| case SkClipStack::Element::kRRect_Type: |
| visitor->clipRRect(element->getRRect(), element->getOp(), element->isAA()); |
| break; |
| case SkClipStack::Element::kRect_Type: |
| visitor->clipRect(element->getRect(), element->getOp(), element->isAA()); |
| break; |
| case SkClipStack::Element::kEmpty_Type: |
| visitor->clipRect(kEmpty, SkRegion::kIntersect_Op, false); |
| break; |
| } |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkCanvas::isClipEmpty() const { |
| return fMCRec->fRasterClip->isEmpty(); |
| } |
| |
| bool SkCanvas::isClipRect() const { |
| return fMCRec->fRasterClip->isRect(); |
| } |
| |
| bool SkCanvas::quickReject(const SkRect& rect) const { |
| |
| if (!rect.isFinite()) |
| return true; |
| |
| if (fMCRec->fRasterClip->isEmpty()) { |
| return true; |
| } |
| |
| if (fMCRec->fMatrix->hasPerspective()) { |
| SkRect dst; |
| fMCRec->fMatrix->mapRect(&dst, rect); |
| SkIRect idst; |
| dst.roundOut(&idst); |
| return !SkIRect::Intersects(idst, fMCRec->fRasterClip->getBounds()); |
| } else { |
| const SkRect& clipR = this->getLocalClipBounds(); |
| |
| // for speed, do the most likely reject compares first |
| // TODO: should we use | instead, or compare all 4 at once? |
| if (rect.fTop >= clipR.fBottom || rect.fBottom <= clipR.fTop) { |
| return true; |
| } |
| if (rect.fLeft >= clipR.fRight || rect.fRight <= clipR.fLeft) { |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| bool SkCanvas::quickReject(const SkPath& path) const { |
| return path.isEmpty() || this->quickReject(path.getBounds()); |
| } |
| |
| bool SkCanvas::getClipBounds(SkRect* bounds) const { |
| SkIRect ibounds; |
| if (!this->getClipDeviceBounds(&ibounds)) { |
| return false; |
| } |
| |
| SkMatrix inverse; |
| // if we can't invert the CTM, we can't return local clip bounds |
| if (!fMCRec->fMatrix->invert(&inverse)) { |
| if (bounds) { |
| bounds->setEmpty(); |
| } |
| return false; |
| } |
| |
| if (NULL != bounds) { |
| SkRect r; |
| // adjust it outwards in case we are antialiasing |
| const int inset = 1; |
| |
| r.iset(ibounds.fLeft - inset, ibounds.fTop - inset, |
| ibounds.fRight + inset, ibounds.fBottom + inset); |
| inverse.mapRect(bounds, r); |
| } |
| return true; |
| } |
| |
| bool SkCanvas::getClipDeviceBounds(SkIRect* bounds) const { |
| const SkRasterClip& clip = *fMCRec->fRasterClip; |
| if (clip.isEmpty()) { |
| if (bounds) { |
| bounds->setEmpty(); |
| } |
| return false; |
| } |
| |
| if (NULL != bounds) { |
| *bounds = clip.getBounds(); |
| } |
| return true; |
| } |
| |
| const SkMatrix& SkCanvas::getTotalMatrix() const { |
| return *fMCRec->fMatrix; |
| } |
| |
| #ifdef SK_SUPPORT_LEGACY_GETCLIPTYPE |
| SkCanvas::ClipType SkCanvas::getClipType() const { |
| if (fMCRec->fRasterClip->isEmpty()) { |
| return kEmpty_ClipType; |
| } |
| if (fMCRec->fRasterClip->isRect()) { |
| return kRect_ClipType; |
| } |
| return kComplex_ClipType; |
| } |
| #endif |
| |
| #ifdef SK_SUPPORT_LEGACY_GETTOTALCLIP |
| const SkRegion& SkCanvas::getTotalClip() const { |
| return fMCRec->fRasterClip->forceGetBW(); |
| } |
| #endif |
| |
| const SkRegion& SkCanvas::internal_private_getTotalClip() const { |
| return fMCRec->fRasterClip->forceGetBW(); |
| } |
| |
| void SkCanvas::internal_private_getTotalClipAsPath(SkPath* path) const { |
| path->reset(); |
| |
| const SkRegion& rgn = fMCRec->fRasterClip->forceGetBW(); |
| if (rgn.isEmpty()) { |
| return; |
| } |
| (void)rgn.getBoundaryPath(path); |
| } |
| |
| GrRenderTarget* SkCanvas::internal_private_accessTopLayerRenderTarget() { |
| SkBaseDevice* dev = this->getTopDevice(); |
| return dev ? dev->accessRenderTarget() : NULL; |
| } |
| |
| SkBaseDevice* SkCanvas::createLayerDevice(const SkImageInfo& info) { |
| SkBaseDevice* device = this->getTopDevice(); |
| return device ? device->createCompatibleDeviceForSaveLayer(info) : NULL; |
| } |
| |
| GrContext* SkCanvas::getGrContext() { |
| #if SK_SUPPORT_GPU |
| SkBaseDevice* device = this->getTopDevice(); |
| if (NULL != device) { |
| GrRenderTarget* renderTarget = device->accessRenderTarget(); |
| if (NULL != renderTarget) { |
| return renderTarget->getContext(); |
| } |
| } |
| #endif |
| |
| return NULL; |
| |
| } |
| |
| void SkCanvas::drawDRRect(const SkRRect& outer, const SkRRect& inner, |
| const SkPaint& paint) { |
| if (outer.isEmpty()) { |
| return; |
| } |
| if (inner.isEmpty()) { |
| this->drawRRect(outer, paint); |
| return; |
| } |
| |
| // We don't have this method (yet), but technically this is what we should |
| // be able to assert... |
| // SkASSERT(outer.contains(inner)); |
| // |
| // For now at least check for containment of bounds |
| SkASSERT(outer.getBounds().contains(inner.getBounds())); |
| |
| this->onDrawDRRect(outer, inner, paint); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // These are the virtual drawing methods |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::clear(SkColor color) { |
| SkDrawIter iter(this); |
| this->predrawNotify(); |
| while (iter.next()) { |
| iter.fDevice->clear(color); |
| } |
| } |
| |
| void SkCanvas::onDiscard() { |
| if (NULL != fSurfaceBase) { |
| fSurfaceBase->aboutToDraw(SkSurface::kDiscard_ContentChangeMode); |
| } |
| } |
| |
| void SkCanvas::drawPaint(const SkPaint& paint) { |
| this->internalDrawPaint(paint); |
| } |
| |
| void SkCanvas::internalDrawPaint(const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kPaint_Type, NULL) |
| |
| while (iter.next()) { |
| iter.fDevice->drawPaint(iter, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawPoints(PointMode mode, size_t count, const SkPoint pts[], |
| const SkPaint& paint) { |
| if ((long)count <= 0) { |
| return; |
| } |
| |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| SkRect r, storage; |
| const SkRect* bounds = NULL; |
| if (paint.canComputeFastBounds()) { |
| // special-case 2 points (common for drawing a single line) |
| if (2 == count) { |
| r.set(pts[0], pts[1]); |
| } else { |
| r.set(pts, SkToInt(count)); |
| } |
| bounds = &paint.computeFastStrokeBounds(r, &storage); |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| SkASSERT(pts != NULL); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kPoint_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawPoints(iter, mode, count, pts, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawRect(const SkRect& r, const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| SkRect storage; |
| const SkRect* bounds = NULL; |
| if (paint.canComputeFastBounds()) { |
| bounds = &paint.computeFastBounds(r, &storage); |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kRect_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawRect(iter, r, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawOval(const SkRect& oval, const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| SkRect storage; |
| const SkRect* bounds = NULL; |
| if (paint.canComputeFastBounds()) { |
| bounds = &paint.computeFastBounds(oval, &storage); |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kOval_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawOval(iter, oval, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawRRect(const SkRRect& rrect, const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| SkRect storage; |
| const SkRect* bounds = NULL; |
| if (paint.canComputeFastBounds()) { |
| bounds = &paint.computeFastBounds(rrect.getBounds(), &storage); |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| if (rrect.isRect()) { |
| // call the non-virtual version |
| this->SkCanvas::drawRect(rrect.getBounds(), paint); |
| return; |
| } else if (rrect.isOval()) { |
| // call the non-virtual version |
| this->SkCanvas::drawOval(rrect.getBounds(), paint); |
| return; |
| } |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kRRect_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawRRect(iter, rrect, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, |
| const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| SkRect storage; |
| const SkRect* bounds = NULL; |
| if (paint.canComputeFastBounds()) { |
| bounds = &paint.computeFastBounds(outer.getBounds(), &storage); |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kRRect_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawDRRect(iter, outer, inner, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawPath(const SkPath& path, const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| if (!path.isFinite()) { |
| return; |
| } |
| |
| SkRect storage; |
| const SkRect* bounds = NULL; |
| if (!path.isInverseFillType() && paint.canComputeFastBounds()) { |
| const SkRect& pathBounds = path.getBounds(); |
| bounds = &paint.computeFastBounds(pathBounds, &storage); |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| const SkRect& r = path.getBounds(); |
| if (r.width() <= 0 && r.height() <= 0) { |
| if (path.isInverseFillType()) { |
| this->internalDrawPaint(paint); |
| } |
| return; |
| } |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kPath_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawPath(iter, path, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y, |
| const SkPaint* paint) { |
| SkDEBUGCODE(bitmap.validate();) |
| |
| if (NULL == paint || paint->canComputeFastBounds()) { |
| SkRect bounds = { |
| x, y, |
| x + SkIntToScalar(bitmap.width()), |
| y + SkIntToScalar(bitmap.height()) |
| }; |
| if (paint) { |
| (void)paint->computeFastBounds(bounds, &bounds); |
| } |
| if (this->quickReject(bounds)) { |
| return; |
| } |
| } |
| |
| SkMatrix matrix; |
| matrix.setTranslate(x, y); |
| this->internalDrawBitmap(bitmap, matrix, paint); |
| } |
| |
| // this one is non-virtual, so it can be called safely by other canvas apis |
| void SkCanvas::internalDrawBitmapRect(const SkBitmap& bitmap, const SkRect* src, |
| const SkRect& dst, const SkPaint* paint, |
| DrawBitmapRectFlags flags) { |
| if (bitmap.drawsNothing() || dst.isEmpty()) { |
| return; |
| } |
| |
| CHECK_LOCKCOUNT_BALANCE(bitmap); |
| |
| SkRect storage; |
| const SkRect* bounds = &dst; |
| if (NULL == paint || paint->canComputeFastBounds()) { |
| if (paint) { |
| bounds = &paint->computeFastBounds(dst, &storage); |
| } |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| SkLazyPaint lazy; |
| if (NULL == paint) { |
| paint = lazy.init(); |
| } |
| |
| LOOPER_BEGIN(*paint, SkDrawFilter::kBitmap_Type, bounds) |
| |
| while (iter.next()) { |
| iter.fDevice->drawBitmapRect(iter, bitmap, src, dst, looper.paint(), flags); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src, |
| const SkRect& dst, const SkPaint* paint, |
| DrawBitmapRectFlags flags) { |
| SkDEBUGCODE(bitmap.validate();) |
| this->internalDrawBitmapRect(bitmap, src, dst, paint, flags); |
| } |
| |
| void SkCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& matrix, |
| const SkPaint* paint) { |
| SkDEBUGCODE(bitmap.validate();) |
| this->internalDrawBitmap(bitmap, matrix, paint); |
| } |
| |
| void SkCanvas::internalDrawBitmapNine(const SkBitmap& bitmap, |
| const SkIRect& center, const SkRect& dst, |
| const SkPaint* paint) { |
| if (bitmap.drawsNothing()) { |
| return; |
| } |
| if (NULL == paint || paint->canComputeFastBounds()) { |
| SkRect storage; |
| const SkRect* bounds = &dst; |
| if (paint) { |
| bounds = &paint->computeFastBounds(dst, &storage); |
| } |
| if (this->quickReject(*bounds)) { |
| return; |
| } |
| } |
| |
| const int32_t w = bitmap.width(); |
| const int32_t h = bitmap.height(); |
| |
| SkIRect c = center; |
| // pin center to the bounds of the bitmap |
| c.fLeft = SkMax32(0, center.fLeft); |
| c.fTop = SkMax32(0, center.fTop); |
| c.fRight = SkPin32(center.fRight, c.fLeft, w); |
| c.fBottom = SkPin32(center.fBottom, c.fTop, h); |
| |
| const SkScalar srcX[4] = { |
| 0, SkIntToScalar(c.fLeft), SkIntToScalar(c.fRight), SkIntToScalar(w) |
| }; |
| const SkScalar srcY[4] = { |
| 0, SkIntToScalar(c.fTop), SkIntToScalar(c.fBottom), SkIntToScalar(h) |
| }; |
| SkScalar dstX[4] = { |
| dst.fLeft, dst.fLeft + SkIntToScalar(c.fLeft), |
| dst.fRight - SkIntToScalar(w - c.fRight), dst.fRight |
| }; |
| SkScalar dstY[4] = { |
| dst.fTop, dst.fTop + SkIntToScalar(c.fTop), |
| dst.fBottom - SkIntToScalar(h - c.fBottom), dst.fBottom |
| }; |
| |
| if (dstX[1] > dstX[2]) { |
| dstX[1] = dstX[0] + (dstX[3] - dstX[0]) * c.fLeft / (w - c.width()); |
| dstX[2] = dstX[1]; |
| } |
| |
| if (dstY[1] > dstY[2]) { |
| dstY[1] = dstY[0] + (dstY[3] - dstY[0]) * c.fTop / (h - c.height()); |
| dstY[2] = dstY[1]; |
| } |
| |
| for (int y = 0; y < 3; y++) { |
| SkRect s, d; |
| |
| s.fTop = srcY[y]; |
| s.fBottom = srcY[y+1]; |
| d.fTop = dstY[y]; |
| d.fBottom = dstY[y+1]; |
| for (int x = 0; x < 3; x++) { |
| s.fLeft = srcX[x]; |
| s.fRight = srcX[x+1]; |
| d.fLeft = dstX[x]; |
| d.fRight = dstX[x+1]; |
| this->internalDrawBitmapRect(bitmap, &s, d, paint, |
| kNone_DrawBitmapRectFlag); |
| } |
| } |
| } |
| |
| void SkCanvas::drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center, |
| const SkRect& dst, const SkPaint* paint) { |
| SkDEBUGCODE(bitmap.validate();) |
| |
| // Need a device entry-point, so gpu can use a mesh |
| this->internalDrawBitmapNine(bitmap, center, dst, paint); |
| } |
| |
| class SkDeviceFilteredPaint { |
| public: |
| SkDeviceFilteredPaint(SkBaseDevice* device, const SkPaint& paint) { |
| SkBaseDevice::TextFlags flags; |
| if (device->filterTextFlags(paint, &flags)) { |
| SkPaint* newPaint = fLazy.set(paint); |
| newPaint->setFlags(flags.fFlags); |
| newPaint->setHinting(flags.fHinting); |
| fPaint = newPaint; |
| } else { |
| fPaint = &paint; |
| } |
| } |
| |
| const SkPaint& paint() const { return *fPaint; } |
| |
| private: |
| const SkPaint* fPaint; |
| SkLazyPaint fLazy; |
| }; |
| |
| void SkCanvas::DrawRect(const SkDraw& draw, const SkPaint& paint, |
| const SkRect& r, SkScalar textSize) { |
| if (paint.getStyle() == SkPaint::kFill_Style) { |
| draw.fDevice->drawRect(draw, r, paint); |
| } else { |
| SkPaint p(paint); |
| p.setStrokeWidth(SkScalarMul(textSize, paint.getStrokeWidth())); |
| draw.fDevice->drawRect(draw, r, p); |
| } |
| } |
| |
| void SkCanvas::DrawTextDecorations(const SkDraw& draw, const SkPaint& paint, |
| const char text[], size_t byteLength, |
| SkScalar x, SkScalar y) { |
| SkASSERT(byteLength == 0 || text != NULL); |
| |
| // nothing to draw |
| if (text == NULL || byteLength == 0 || |
| draw.fClip->isEmpty() || |
| (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| return; |
| } |
| |
| SkScalar width = 0; |
| SkPoint start; |
| |
| start.set(0, 0); // to avoid warning |
| if (paint.getFlags() & (SkPaint::kUnderlineText_Flag | |
| SkPaint::kStrikeThruText_Flag)) { |
| width = paint.measureText(text, byteLength); |
| |
| SkScalar offsetX = 0; |
| if (paint.getTextAlign() == SkPaint::kCenter_Align) { |
| offsetX = SkScalarHalf(width); |
| } else if (paint.getTextAlign() == SkPaint::kRight_Align) { |
| offsetX = width; |
| } |
| start.set(x - offsetX, y); |
| } |
| |
| if (0 == width) { |
| return; |
| } |
| |
| uint32_t flags = paint.getFlags(); |
| |
| if (flags & (SkPaint::kUnderlineText_Flag | |
| SkPaint::kStrikeThruText_Flag)) { |
| SkScalar textSize = paint.getTextSize(); |
| SkScalar height = SkScalarMul(textSize, kStdUnderline_Thickness); |
| SkRect r; |
| |
| r.fLeft = start.fX; |
| r.fRight = start.fX + width; |
| |
| if (flags & SkPaint::kUnderlineText_Flag) { |
| SkScalar offset = SkScalarMulAdd(textSize, kStdUnderline_Offset, |
| start.fY); |
| r.fTop = offset; |
| r.fBottom = offset + height; |
| DrawRect(draw, paint, r, textSize); |
| } |
| if (flags & SkPaint::kStrikeThruText_Flag) { |
| SkScalar offset = SkScalarMulAdd(textSize, kStdStrikeThru_Offset, |
| start.fY); |
| r.fTop = offset; |
| r.fBottom = offset + height; |
| DrawRect(draw, paint, r, textSize); |
| } |
| } |
| } |
| |
| void SkCanvas::drawText(const void* text, size_t byteLength, |
| SkScalar x, SkScalar y, const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) |
| |
| while (iter.next()) { |
| SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint()); |
| iter.fDevice->drawText(iter, text, byteLength, x, y, dfp.paint()); |
| DrawTextDecorations(iter, dfp.paint(), |
| static_cast<const char*>(text), byteLength, x, y); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawPosText(const void* text, size_t byteLength, |
| const SkPoint pos[], const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) |
| |
| while (iter.next()) { |
| SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint()); |
| iter.fDevice->drawPosText(iter, text, byteLength, &pos->fX, 0, 2, |
| dfp.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawPosTextH(const void* text, size_t byteLength, |
| const SkScalar xpos[], SkScalar constY, |
| const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) |
| |
| while (iter.next()) { |
| SkDeviceFilteredPaint dfp(iter.fDevice, looper.paint()); |
| iter.fDevice->drawPosText(iter, text, byteLength, xpos, constY, 1, |
| dfp.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawTextOnPath(const void* text, size_t byteLength, |
| const SkPath& path, const SkMatrix* matrix, |
| const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type, NULL) |
| |
| while (iter.next()) { |
| iter.fDevice->drawTextOnPath(iter, text, byteLength, path, |
| matrix, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawVertices(VertexMode vmode, int vertexCount, |
| const SkPoint verts[], const SkPoint texs[], |
| const SkColor colors[], SkXfermode* xmode, |
| const uint16_t indices[], int indexCount, |
| const SkPaint& paint) { |
| CHECK_SHADER_NOSETCONTEXT(paint); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kPath_Type, NULL) |
| |
| while (iter.next()) { |
| iter.fDevice->drawVertices(iter, vmode, vertexCount, verts, texs, |
| colors, xmode, indices, indexCount, |
| looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // These methods are NOT virtual, and therefore must call back into virtual |
| // methods, rather than actually drawing themselves. |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::drawARGB(U8CPU a, U8CPU r, U8CPU g, U8CPU b, |
| SkXfermode::Mode mode) { |
| SkPaint paint; |
| |
| paint.setARGB(a, r, g, b); |
| if (SkXfermode::kSrcOver_Mode != mode) { |
| paint.setXfermodeMode(mode); |
| } |
| this->drawPaint(paint); |
| } |
| |
| void SkCanvas::drawColor(SkColor c, SkXfermode::Mode mode) { |
| SkPaint paint; |
| |
| paint.setColor(c); |
| if (SkXfermode::kSrcOver_Mode != mode) { |
| paint.setXfermodeMode(mode); |
| } |
| this->drawPaint(paint); |
| } |
| |
| void SkCanvas::drawPoint(SkScalar x, SkScalar y, const SkPaint& paint) { |
| SkPoint pt; |
| |
| pt.set(x, y); |
| this->drawPoints(kPoints_PointMode, 1, &pt, paint); |
| } |
| |
| void SkCanvas::drawPoint(SkScalar x, SkScalar y, SkColor color) { |
| SkPoint pt; |
| SkPaint paint; |
| |
| pt.set(x, y); |
| paint.setColor(color); |
| this->drawPoints(kPoints_PointMode, 1, &pt, paint); |
| } |
| |
| void SkCanvas::drawLine(SkScalar x0, SkScalar y0, SkScalar x1, SkScalar y1, |
| const SkPaint& paint) { |
| SkPoint pts[2]; |
| |
| pts[0].set(x0, y0); |
| pts[1].set(x1, y1); |
| this->drawPoints(kLines_PointMode, 2, pts, paint); |
| } |
| |
| void SkCanvas::drawRectCoords(SkScalar left, SkScalar top, |
| SkScalar right, SkScalar bottom, |
| const SkPaint& paint) { |
| SkRect r; |
| |
| r.set(left, top, right, bottom); |
| this->drawRect(r, paint); |
| } |
| |
| void SkCanvas::drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, |
| const SkPaint& paint) { |
| if (radius < 0) { |
| radius = 0; |
| } |
| |
| SkRect r; |
| r.set(cx - radius, cy - radius, cx + radius, cy + radius); |
| this->drawOval(r, paint); |
| } |
| |
| void SkCanvas::drawRoundRect(const SkRect& r, SkScalar rx, SkScalar ry, |
| const SkPaint& paint) { |
| if (rx > 0 && ry > 0) { |
| if (paint.canComputeFastBounds()) { |
| SkRect storage; |
| if (this->quickReject(paint.computeFastBounds(r, &storage))) { |
| return; |
| } |
| } |
| SkRRect rrect; |
| rrect.setRectXY(r, rx, ry); |
| this->drawRRect(rrect, paint); |
| } else { |
| this->drawRect(r, paint); |
| } |
| } |
| |
| void SkCanvas::drawArc(const SkRect& oval, SkScalar startAngle, |
| SkScalar sweepAngle, bool useCenter, |
| const SkPaint& paint) { |
| if (SkScalarAbs(sweepAngle) >= SkIntToScalar(360)) { |
| this->drawOval(oval, paint); |
| } else { |
| SkPath path; |
| if (useCenter) { |
| path.moveTo(oval.centerX(), oval.centerY()); |
| } |
| path.arcTo(oval, startAngle, sweepAngle, !useCenter); |
| if (useCenter) { |
| path.close(); |
| } |
| this->drawPath(path, paint); |
| } |
| } |
| |
| void SkCanvas::drawTextOnPathHV(const void* text, size_t byteLength, |
| const SkPath& path, SkScalar hOffset, |
| SkScalar vOffset, const SkPaint& paint) { |
| SkMatrix matrix; |
| |
| matrix.setTranslate(hOffset, vOffset); |
| this->drawTextOnPath(text, byteLength, path, &matrix, paint); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| void SkCanvas::EXPERIMENTAL_optimize(SkPicture* picture) { |
| SkBaseDevice* device = this->getDevice(); |
| if (NULL != device) { |
| device->EXPERIMENTAL_optimize(picture); |
| } |
| } |
| |
| void SkCanvas::EXPERIMENTAL_purge(SkPicture* picture) { |
| SkBaseDevice* device = this->getTopDevice(); |
| if (NULL != device) { |
| device->EXPERIMENTAL_purge(picture); |
| } |
| } |
| |
| void SkCanvas::drawPicture(SkPicture& picture) { |
| SkBaseDevice* device = this->getTopDevice(); |
| if (NULL != device) { |
| // Canvas has to first give the device the opportunity to render |
| // the picture itself. |
| if (device->EXPERIMENTAL_drawPicture(this, &picture)) { |
| return; // the device has rendered the entire picture |
| } |
| } |
| |
| picture.draw(this); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkCanvas::LayerIter::LayerIter(SkCanvas* canvas, bool skipEmptyClips) { |
| SK_COMPILE_ASSERT(sizeof(fStorage) >= sizeof(SkDrawIter), fStorage_too_small); |
| |
| SkASSERT(canvas); |
| |
| fImpl = new (fStorage) SkDrawIter(canvas, skipEmptyClips); |
| fDone = !fImpl->next(); |
| } |
| |
| SkCanvas::LayerIter::~LayerIter() { |
| fImpl->~SkDrawIter(); |
| } |
| |
| void SkCanvas::LayerIter::next() { |
| fDone = !fImpl->next(); |
| } |
| |
| SkBaseDevice* SkCanvas::LayerIter::device() const { |
| return fImpl->getDevice(); |
| } |
| |
| const SkMatrix& SkCanvas::LayerIter::matrix() const { |
| return fImpl->getMatrix(); |
| } |
| |
| const SkPaint& SkCanvas::LayerIter::paint() const { |
| const SkPaint* paint = fImpl->getPaint(); |
| if (NULL == paint) { |
| paint = &fDefaultPaint; |
| } |
| return *paint; |
| } |
| |
| const SkRegion& SkCanvas::LayerIter::clip() const { return fImpl->getClip(); } |
| int SkCanvas::LayerIter::x() const { return fImpl->getX(); } |
| int SkCanvas::LayerIter::y() const { return fImpl->getY(); } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkCanvas::ClipVisitor::~ClipVisitor() { } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static bool supported_for_raster_canvas(const SkImageInfo& info) { |
| switch (info.alphaType()) { |
| case kPremul_SkAlphaType: |
| case kOpaque_SkAlphaType: |
| break; |
| default: |
| return false; |
| } |
| |
| switch (info.colorType()) { |
| case kAlpha_8_SkColorType: |
| case kRGB_565_SkColorType: |
| case kN32_SkColorType: |
| break; |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| SkCanvas* SkCanvas::NewRaster(const SkImageInfo& info) { |
| if (!supported_for_raster_canvas(info)) { |
| return NULL; |
| } |
| |
| SkBitmap bitmap; |
| if (!bitmap.allocPixels(info)) { |
| return NULL; |
| } |
| |
| // should this functionality be moved into allocPixels()? |
| if (!bitmap.info().isOpaque()) { |
| bitmap.eraseColor(0); |
| } |
| return SkNEW_ARGS(SkCanvas, (bitmap)); |
| } |
| |
| SkCanvas* SkCanvas::NewRasterDirect(const SkImageInfo& info, void* pixels, size_t rowBytes) { |
| if (!supported_for_raster_canvas(info)) { |
| return NULL; |
| } |
| |
| SkBitmap bitmap; |
| if (!bitmap.installPixels(info, pixels, rowBytes)) { |
| return NULL; |
| } |
| return SkNEW_ARGS(SkCanvas, (bitmap)); |
| } |