| |
| /* |
| * 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 "SkBounder.h" |
| #include "SkDevice.h" |
| #include "SkDraw.h" |
| #include "SkDrawFilter.h" |
| #include "SkDrawLooper.h" |
| #include "SkPicture.h" |
| #include "SkRasterClip.h" |
| #include "SkScalarCompare.h" |
| #include "SkTemplates.h" |
| #include "SkTextFormatParams.h" |
| #include "SkTLazy.h" |
| #include "SkUtils.h" |
| |
| //#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 |
| |
| typedef SkTLazy<SkPaint> SkLazyPaint; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // Helpers for computing fast bounds for quickReject tests |
| |
| static SkCanvas::EdgeType paint2EdgeType(const SkPaint* paint) { |
| return paint != NULL && paint->isAntiAlias() ? |
| SkCanvas::kAA_EdgeType : SkCanvas::kBW_EdgeType; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| /* This is the record we keep for each SkDevice 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; |
| SkDevice* fDevice; |
| SkRasterClip fClip; |
| const SkMatrix* fMatrix; |
| SkPaint* fPaint; // may be null (in the future) |
| // optional, related to canvas' external matrix |
| const SkMatrix* fMVMatrix; |
| const SkMatrix* fExtMatrix; |
| |
| DeviceCM(SkDevice* device, int x, int y, const SkPaint* paint) |
| : fNext(NULL) { |
| if (NULL != device) { |
| device->ref(); |
| device->lockPixels(); |
| } |
| fDevice = device; |
| fPaint = paint ? SkNEW_ARGS(SkPaint, (*paint)) : NULL; |
| } |
| |
| ~DeviceCM() { |
| if (NULL != fDevice) { |
| fDevice->unlockPixels(); |
| 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 |
| // default is to assume no external matrix |
| fMVMatrix = NULL; |
| fExtMatrix = NULL; |
| } |
| |
| // can only be called after calling updateMC() |
| void updateExternalMatrix(const SkMatrix& extM, const SkMatrix& extI) { |
| fMVMatrixStorage.setConcat(extI, *fMatrix); |
| fMVMatrix = &fMVMatrixStorage; |
| fExtMatrix = &extM; // assumes extM has long life-time (owned by canvas) |
| } |
| |
| private: |
| SkMatrix fMatrixStorage, fMVMatrixStorage; |
| }; |
| |
| /* 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: |
| MCRec* fNext; |
| 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) { |
| 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->getTotalClipStack(); |
| 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; |
| fMVMatrix = rec->fMVMatrix; |
| fExtMatrix = rec->fExtMatrix; |
| SkDEBUGCODE(this->validate();) |
| |
| fCurrLayer = rec->fNext; |
| if (fBounder) { |
| fBounder->setClip(fClip); |
| } |
| // fCurrLayer may be NULL now |
| |
| fCanvas->prepareForDeviceDraw(fDevice, *fMatrix, *fClip, *fClipStack); |
| return true; |
| } |
| return false; |
| } |
| |
| SkDevice* 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) : fOrigPaint(paint) { |
| fCanvas = canvas; |
| fLooper = paint.getLooper(); |
| fFilter = canvas->getDrawFilter(); |
| fPaint = NULL; |
| fSaveCount = canvas->getSaveCount(); |
| fDone = false; |
| |
| if (fLooper) { |
| fLooper->init(canvas); |
| } |
| } |
| |
| ~AutoDrawLooper() { |
| SkASSERT(fCanvas->getSaveCount() == fSaveCount); |
| } |
| |
| const SkPaint& paint() const { |
| SkASSERT(fPaint); |
| return *fPaint; |
| } |
| |
| bool next(SkDrawFilter::Type drawType); |
| |
| private: |
| SkLazyPaint fLazyPaint; |
| SkCanvas* fCanvas; |
| const SkPaint& fOrigPaint; |
| SkDrawLooper* fLooper; |
| SkDrawFilter* fFilter; |
| const SkPaint* fPaint; |
| int fSaveCount; |
| bool fDone; |
| }; |
| |
| bool AutoDrawLooper::next(SkDrawFilter::Type drawType) { |
| fPaint = NULL; |
| if (fDone) { |
| return false; |
| } |
| |
| if (fLooper || fFilter) { |
| SkPaint* paint = fLazyPaint.set(fOrigPaint); |
| if (fLooper && !fLooper->next(fCanvas, paint)) { |
| fDone = true; |
| return false; |
| } |
| if (fFilter) { |
| fFilter->filter(paint, drawType); |
| if (NULL == fLooper) { |
| // no looper means we only draw once |
| fDone = true; |
| } |
| } |
| fPaint = paint; |
| } else { |
| fDone = true; |
| fPaint = &fOrigPaint; |
| } |
| |
| // 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; |
| }; |
| |
| #include "SkColorPriv.h" |
| |
| class AutoValidator { |
| public: |
| AutoValidator(SkDevice* device) : fDevice(device) {} |
| ~AutoValidator() { |
| #ifdef SK_DEBUG |
| const SkBitmap& bm = fDevice->accessBitmap(false); |
| if (bm.config() == SkBitmap::kARGB_4444_Config) { |
| for (int y = 0; y < bm.height(); y++) { |
| const SkPMColor16* p = bm.getAddr16(0, y); |
| for (int x = 0; x < bm.width(); x++) { |
| SkPMColor16 c = p[x]; |
| SkPMColor16Assert(c); |
| } |
| } |
| } |
| #endif |
| } |
| private: |
| SkDevice* fDevice; |
| }; |
| |
| ////////// macros to place around the internal draw calls ////////////////// |
| |
| #define LOOPER_BEGIN(paint, type) \ |
| /* AutoValidator validator(fMCRec->fTopLayer->fDevice); */ \ |
| AutoDrawLooper looper(this, paint); \ |
| while (looper.next(type)) { \ |
| SkAutoBounderCommit ac(fBounder); \ |
| SkDrawIter iter(this); |
| |
| #define LOOPER_END } |
| |
| //////////////////////////////////////////////////////////////////////////// |
| |
| SkDevice* SkCanvas::init(SkDevice* device) { |
| fBounder = NULL; |
| fLocalBoundsCompareType.setEmpty(); |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeBW.setEmpty(); |
| fLocalBoundsCompareTypeDirtyBW = true; |
| fLastDeviceToGainFocus = NULL; |
| fDeviceCMDirty = false; |
| fLayerCount = 0; |
| |
| fMCRec = (MCRec*)fMCStack.push_back(); |
| new (fMCRec) MCRec(NULL, 0); |
| |
| fMCRec->fLayer = SkNEW_ARGS(DeviceCM, (NULL, 0, 0, NULL)); |
| fMCRec->fTopLayer = fMCRec->fLayer; |
| fMCRec->fNext = NULL; |
| |
| fExternalMatrix.reset(); |
| fExternalInverse.reset(); |
| fUseExternalMatrix = false; |
| |
| return this->setDevice(device); |
| } |
| |
| SkCanvas::SkCanvas() |
| : fMCStack(sizeof(MCRec), fMCRecStorage, sizeof(fMCRecStorage)) { |
| inc_canvas(); |
| |
| SkBitmap bitmap; |
| this->init(SkNEW_ARGS(SkDevice, (bitmap)))->unref(); |
| } |
| |
| SkCanvas::SkCanvas(SkDevice* 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(SkDevice, (bitmap)))->unref(); |
| } |
| |
| SkCanvas::~SkCanvas() { |
| // free up the contents of our deque |
| this->restoreToCount(1); // restore everything but the last |
| SkASSERT(0 == fLayerCount); |
| |
| this->internalRestore(); // restore the last, since we're going away |
| |
| SkSafeUnref(fBounder); |
| |
| 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; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::flush() { |
| SkDevice* device = this->getDevice(); |
| if (device) { |
| device->flush(); |
| } |
| } |
| |
| SkISize SkCanvas::getDeviceSize() const { |
| SkDevice* d = this->getDevice(); |
| return d ? SkISize::Make(d->width(), d->height()) : SkISize::Make(0, 0); |
| } |
| |
| SkDevice* SkCanvas::getDevice() const { |
| // return root device |
| SkDeque::F2BIter iter(fMCStack); |
| MCRec* rec = (MCRec*)iter.next(); |
| SkASSERT(rec && rec->fLayer); |
| return rec->fLayer->fDevice; |
| } |
| |
| SkDevice* SkCanvas::getTopDevice() const { |
| return fMCRec->fTopLayer->fDevice; |
| } |
| |
| SkDevice* SkCanvas::setDevice(SkDevice* device) { |
| // return root device |
| SkDeque::F2BIter iter(fMCStack); |
| MCRec* rec = (MCRec*)iter.next(); |
| SkASSERT(rec && rec->fLayer); |
| SkDevice* rootDevice = rec->fLayer->fDevice; |
| |
| if (rootDevice == device) { |
| return device; |
| } |
| |
| /* Notify the devices that they are going in/out of scope, so they can do |
| things like lock/unlock their pixels, etc. |
| */ |
| if (device) { |
| device->lockPixels(); |
| } |
| if (rootDevice) { |
| rootDevice->unlockPixels(); |
| } |
| |
| 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. |
| */ |
| |
| if (NULL == device) { |
| rec->fRasterClip->setEmpty(); |
| while ((rec = (MCRec*)iter.next()) != NULL) { |
| (void)rec->fRasterClip->setEmpty(); |
| } |
| fClipStack.reset(); |
| } else { |
| // compute our total bounds for all devices |
| SkIRect bounds; |
| |
| bounds.set(0, 0, device->width(), device->height()); |
| |
| // 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; |
| } |
| |
| SkDevice* SkCanvas::setBitmapDevice(const SkBitmap& bitmap) { |
| SkDevice* device = this->setDevice(SkNEW_ARGS(SkDevice, (bitmap))); |
| device->unref(); |
| return device; |
| } |
| |
| bool SkCanvas::readPixels(SkBitmap* bitmap, |
| int x, int y, |
| Config8888 config8888) { |
| SkDevice* device = this->getDevice(); |
| if (!device) { |
| return false; |
| } |
| return device->readPixels(bitmap, x, y, config8888); |
| } |
| |
| bool SkCanvas::readPixels(const SkIRect& srcRect, SkBitmap* bitmap) { |
| SkDevice* device = this->getDevice(); |
| if (!device) { |
| return false; |
| } |
| |
| SkIRect bounds; |
| bounds.set(0, 0, device->width(), device->height()); |
| if (!bounds.intersect(srcRect)) { |
| return false; |
| } |
| |
| SkBitmap tmp; |
| tmp.setConfig(SkBitmap::kARGB_8888_Config, bounds.width(), |
| bounds.height()); |
| if (this->readPixels(&tmp, bounds.fLeft, bounds.fTop)) { |
| bitmap->swap(tmp); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| void SkCanvas::writePixels(const SkBitmap& bitmap, int x, int y, |
| Config8888 config8888) { |
| SkDevice* device = this->getDevice(); |
| if (device) { |
| device->writePixels(bitmap, x, y, config8888); |
| } |
| } |
| |
| 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); |
| if (fUseExternalMatrix) { |
| layer->updateExternalMatrix(fExternalMatrix, |
| fExternalInverse); |
| } |
| } else { |
| SkRasterClip clip(totalClip); |
| do { |
| layer->updateMC(totalMatrix, clip, fClipStack, &clip); |
| if (fUseExternalMatrix) { |
| layer->updateExternalMatrix(fExternalMatrix, |
| fExternalInverse); |
| } |
| } while ((layer = layer->fNext) != NULL); |
| } |
| fDeviceCMDirty = false; |
| } |
| } |
| |
| void SkCanvas::prepareForDeviceDraw(SkDevice* device, const SkMatrix& matrix, |
| const SkRegion& clip, |
| const SkClipStack& clipStack) { |
| SkASSERT(device); |
| if (fLastDeviceToGainFocus != device) { |
| device->gainFocus(this, matrix, clip, clipStack); |
| fLastDeviceToGainFocus = device; |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| 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() |
| |
| newTop->fNext = fMCRec; |
| fMCRec = newTop; |
| |
| fClipStack.save(); |
| SkASSERT(fClipStack.getSaveCount() == this->getSaveCount() - 1); |
| |
| return saveCount; |
| } |
| |
| int SkCanvas::save(SaveFlags flags) { |
| // call shared impl |
| return this->internalSave(flags); |
| } |
| |
| #define C32MASK (1 << SkBitmap::kARGB_8888_Config) |
| #define C16MASK (1 << SkBitmap::kRGB_565_Config) |
| #define C8MASK (1 << SkBitmap::kA8_Config) |
| |
| static SkBitmap::Config resolve_config(SkCanvas* canvas, |
| const SkIRect& bounds, |
| SkCanvas::SaveFlags flags, |
| bool* isOpaque) { |
| *isOpaque = (flags & SkCanvas::kHasAlphaLayer_SaveFlag) == 0; |
| |
| #if 0 |
| // loop through and union all the configs we may draw into |
| uint32_t configMask = 0; |
| for (int i = canvas->countLayerDevices() - 1; i >= 0; --i) |
| { |
| SkDevice* device = canvas->getLayerDevice(i); |
| if (device->intersects(bounds)) |
| configMask |= 1 << device->config(); |
| } |
| |
| // if the caller wants alpha or fullcolor, we can't return 565 |
| if (flags & (SkCanvas::kFullColorLayer_SaveFlag | |
| SkCanvas::kHasAlphaLayer_SaveFlag)) |
| configMask &= ~C16MASK; |
| |
| switch (configMask) { |
| case C8MASK: // if we only have A8, return that |
| return SkBitmap::kA8_Config; |
| |
| case C16MASK: // if we only have 565, return that |
| return SkBitmap::kRGB_565_Config; |
| |
| default: |
| return SkBitmap::kARGB_8888_Config; // default answer |
| } |
| #else |
| return SkBitmap::kARGB_8888_Config; // default answer |
| #endif |
| } |
| |
| static bool bounds_affects_clip(SkCanvas::SaveFlags flags) { |
| return (flags & SkCanvas::kClipToLayer_SaveFlag) != 0; |
| } |
| |
| bool SkCanvas::clipRectBounds(const SkRect* bounds, SaveFlags flags, |
| SkIRect* intersection) { |
| SkIRect clipBounds; |
| if (!this->getClipDeviceBounds(&clipBounds)) { |
| return false; |
| } |
| 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; |
| } |
| |
| fClipStack.clipDevRect(ir, SkRegion::kIntersect_Op); |
| |
| // early exit if the clip is now empty |
| if (bounds_affects_clip(flags) && |
| !fMCRec->fRasterClip->op(ir, SkRegion::kIntersect_Op)) { |
| return false; |
| } |
| |
| if (intersection) { |
| *intersection = ir; |
| } |
| return true; |
| } |
| |
| int SkCanvas::saveLayer(const SkRect* bounds, const SkPaint* paint, |
| SaveFlags flags) { |
| // 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)) { |
| return count; |
| } |
| |
| // Kill the imagefilter if our device doesn't allow it |
| SkLazyPaint lazyP; |
| if (paint && paint->getImageFilter()) { |
| if (!this->getTopDevice()->allowImageFilter(paint->getImageFilter())) { |
| SkPaint* p = lazyP.set(*paint); |
| p->setImageFilter(NULL); |
| paint = p; |
| } |
| } |
| |
| bool isOpaque; |
| SkBitmap::Config config = resolve_config(this, ir, flags, &isOpaque); |
| |
| SkDevice* device; |
| if (paint && paint->getImageFilter()) { |
| device = this->createCompatibleDevice(config, ir.width(), ir.height(), |
| isOpaque); |
| } else { |
| device = this->createLayerDevice(config, ir.width(), ir.height(), |
| isOpaque); |
| } |
| 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)); |
| device->unref(); |
| |
| layer->fNext = fMCRec->fTopLayer; |
| fMCRec->fLayer = layer; |
| fMCRec->fTopLayer = layer; // this field is NOT an owner of layer |
| |
| fLayerCount += 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::restore() { |
| // check for underflow |
| if (fMCStack.count() > 1) { |
| this->internalRestore(); |
| } |
| } |
| |
| void SkCanvas::internalRestore() { |
| SkASSERT(fMCStack.count() != 0); |
| |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| |
| 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->drawDevice(layer->fDevice, origin.x(), origin.y(), |
| layer->fPaint); |
| // reset this, since drawDevice will have set it to true |
| fDeviceCMDirty = true; |
| |
| SkASSERT(fLayerCount > 0); |
| fLayerCount -= 1; |
| } |
| SkDELETE(layer); |
| } |
| |
| SkASSERT(fClipStack.getSaveCount() == this->getSaveCount() - 1); |
| } |
| |
| 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 fLayerCount > 0; |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| // can't draw it if its empty, or its too big for a fixed-point width or height |
| static bool reject_bitmap(const SkBitmap& bitmap) { |
| return bitmap.width() <= 0 || bitmap.height() <= 0 |
| #ifndef SK_ALLOW_OVER_32K_BITMAPS |
| || bitmap.width() > 32767 || bitmap.height() > 32767 |
| #endif |
| ; |
| } |
| |
| void SkCanvas::internalDrawBitmap(const SkBitmap& bitmap, const SkIRect* srcRect, |
| const SkMatrix& matrix, const SkPaint* paint) { |
| if (reject_bitmap(bitmap)) { |
| return; |
| } |
| |
| SkLazyPaint lazy; |
| if (NULL == paint) { |
| paint = lazy.init(); |
| } |
| this->commonDrawBitmap(bitmap, srcRect, matrix, *paint); |
| } |
| |
| #include "SkImageFilter.h" |
| |
| class DeviceImageFilterProxy : public SkImageFilter::Proxy { |
| public: |
| DeviceImageFilterProxy(SkDevice* device) : fDevice(device) {} |
| |
| virtual SkDevice* createDevice(int w, int h) SK_OVERRIDE; |
| virtual bool filterImage(SkImageFilter*, const SkBitmap& src, |
| const SkMatrix& ctm, |
| SkBitmap* result, SkIPoint* offset) SK_OVERRIDE; |
| |
| private: |
| SkDevice* fDevice; |
| }; |
| |
| SkDevice* DeviceImageFilterProxy::createDevice(int w, int h) { |
| return fDevice->createCompatibleDevice(SkBitmap::kARGB_8888_Config, |
| w, h, false); |
| } |
| |
| bool DeviceImageFilterProxy::filterImage(SkImageFilter* filter, |
| const SkBitmap& src, |
| const SkMatrix& ctm, |
| SkBitmap* result, |
| SkIPoint* offset) { |
| return fDevice->filterImage(filter, src, ctm, result, offset); |
| } |
| |
| void SkCanvas::drawDevice(SkDevice* srcDev, int x, int y, |
| const SkPaint* paint) { |
| SkPaint tmp; |
| if (NULL == paint) { |
| tmp.setDither(true); |
| paint = &tmp; |
| } |
| |
| LOOPER_BEGIN(*paint, SkDrawFilter::kBitmap_Type) |
| while (iter.next()) { |
| SkDevice* dstDev = iter.fDevice; |
| paint = &looper.paint(); |
| SkImageFilter* filter = paint->getImageFilter(); |
| SkIPoint pos = { x - iter.getX(), y - iter.getY() }; |
| if (filter) { |
| DeviceImageFilterProxy proxy(dstDev); |
| SkBitmap dst; |
| const SkBitmap& src = srcDev->accessBitmap(false); |
| if (filter->filterImage(&proxy, src, *iter.fMatrix, &dst, &pos)) { |
| SkPaint tmp(*paint); |
| tmp.setImageFilter(NULL); |
| dstDev->drawSprite(iter, dst, pos.x(), pos.y(), tmp); |
| } |
| } else { |
| dstDev->drawDevice(iter, srcDev, pos.x(), pos.y(), *paint); |
| } |
| } |
| LOOPER_END |
| } |
| |
| ///////////////////////////////////////////////////////////////////////////// |
| |
| bool SkCanvas::translate(SkScalar dx, SkScalar dy) { |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| return fMCRec->fMatrix->preTranslate(dx, dy); |
| } |
| |
| bool SkCanvas::scale(SkScalar sx, SkScalar sy) { |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| return fMCRec->fMatrix->preScale(sx, sy); |
| } |
| |
| bool SkCanvas::rotate(SkScalar degrees) { |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| return fMCRec->fMatrix->preRotate(degrees); |
| } |
| |
| bool SkCanvas::skew(SkScalar sx, SkScalar sy) { |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| return fMCRec->fMatrix->preSkew(sx, sy); |
| } |
| |
| bool SkCanvas::concat(const SkMatrix& matrix) { |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| return fMCRec->fMatrix->preConcat(matrix); |
| } |
| |
| void SkCanvas::setMatrix(const SkMatrix& matrix) { |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| *fMCRec->fMatrix = matrix; |
| } |
| |
| // this is not virtual, so it must call a virtual method so that subclasses |
| // will see its action |
| void SkCanvas::resetMatrix() { |
| SkMatrix matrix; |
| |
| matrix.reset(); |
| this->setMatrix(matrix); |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| bool SkCanvas::clipRect(const SkRect& rect, SkRegion::Op op, bool doAA) { |
| AutoValidateClip avc(this); |
| |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| |
| if (fMCRec->fMatrix->rectStaysRect()) { |
| // for these simpler matrices, we can stay a rect ever 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, doAA); |
| return fMCRec->fRasterClip->op(r, op, doAA); |
| } else { |
| // since we're rotate 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); |
| return this->SkCanvas::clipPath(path, op, doAA); |
| } |
| } |
| |
| static bool clipPathHelper(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()) { |
| return currClip->setPath(devPath, *currClip, doAA); |
| } else { |
| base.setRect(currClip->getBounds()); |
| SkRasterClip clip; |
| clip.setPath(devPath, base, doAA); |
| return currClip->op(clip, op); |
| } |
| } else { |
| const SkDevice* device = canvas->getDevice(); |
| if (!device) { |
| return currClip->setEmpty(); |
| } |
| |
| base.setRect(0, 0, device->width(), device->height()); |
| |
| if (SkRegion::kReplace_Op == op) { |
| return currClip->setPath(devPath, base, doAA); |
| } else { |
| SkRasterClip clip; |
| clip.setPath(devPath, base, doAA); |
| return currClip->op(clip, op); |
| } |
| } |
| } |
| |
| bool SkCanvas::clipPath(const SkPath& path, SkRegion::Op op, bool doAA) { |
| AutoValidateClip avc(this); |
| |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = true; |
| |
| 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, doAA); |
| |
| return clipPathHelper(this, fMCRec->fRasterClip, devPath, op, doAA); |
| } |
| |
| bool SkCanvas::clipRegion(const SkRegion& rgn, SkRegion::Op op) { |
| AutoValidateClip avc(this); |
| |
| fDeviceCMDirty = true; |
| fLocalBoundsCompareTypeDirty = true; |
| fLocalBoundsCompareTypeDirtyBW = 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()); |
| |
| return fMCRec->fRasterClip->op(rgn, op); |
| } |
| |
| #ifdef SK_DEBUG |
| void SkCanvas::validateClip() const { |
| // construct clipRgn from the clipstack |
| const SkDevice* device = this->getDevice(); |
| if (!device) { |
| SkASSERT(this->getTotalClip().isEmpty()); |
| return; |
| } |
| |
| SkIRect ir; |
| ir.set(0, 0, device->width(), device->height()); |
| SkRasterClip tmpClip(ir); |
| |
| SkClipStack::B2FIter iter(fClipStack); |
| const SkClipStack::B2FIter::Clip* clip; |
| while ((clip = iter.next()) != NULL) { |
| if (clip->fPath) { |
| clipPathHelper(this, &tmpClip, *clip->fPath, clip->fOp, clip->fDoAA); |
| } else if (clip->fRect) { |
| clip->fRect->round(&ir); |
| tmpClip.op(ir, clip->fOp); |
| } else { |
| tmpClip.setEmpty(); |
| } |
| } |
| |
| #if 0 // enable this locally for testing |
| // now compare against the current rgn |
| const SkRegion& rgn = this->getTotalClip(); |
| SkASSERT(rgn == tmpClip); |
| #endif |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::computeLocalClipBoundsCompareType(EdgeType et) const { |
| SkRect r; |
| SkRectCompareType& rCompare = et == kAA_EdgeType ? fLocalBoundsCompareType : |
| fLocalBoundsCompareTypeBW; |
| |
| if (!this->getClipBounds(&r, et)) { |
| rCompare.setEmpty(); |
| } else { |
| rCompare.set(SkScalarToCompareType(r.fLeft), |
| SkScalarToCompareType(r.fTop), |
| SkScalarToCompareType(r.fRight), |
| SkScalarToCompareType(r.fBottom)); |
| } |
| } |
| |
| /* current impl ignores edgetype, and relies on |
| getLocalClipBoundsCompareType(), which always returns a value assuming |
| antialiasing (worst case) |
| */ |
| bool SkCanvas::quickReject(const SkRect& rect, EdgeType et) 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 SkRectCompareType& clipR = this->getLocalClipBoundsCompareType(et); |
| |
| // for speed, do the most likely reject compares first |
| SkScalarCompareType userT = SkScalarToCompareType(rect.fTop); |
| SkScalarCompareType userB = SkScalarToCompareType(rect.fBottom); |
| if (userT >= clipR.fBottom || userB <= clipR.fTop) { |
| return true; |
| } |
| SkScalarCompareType userL = SkScalarToCompareType(rect.fLeft); |
| SkScalarCompareType userR = SkScalarToCompareType(rect.fRight); |
| if (userL >= clipR.fRight || userR <= clipR.fLeft) { |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| bool SkCanvas::quickReject(const SkPath& path, EdgeType et) const { |
| return path.isEmpty() || this->quickReject(path.getBounds(), et); |
| } |
| |
| static inline int pinIntForScalar(int x) { |
| #ifdef SK_SCALAR_IS_FIXED |
| if (x < SK_MinS16) { |
| x = SK_MinS16; |
| } else if (x > SK_MaxS16) { |
| x = SK_MaxS16; |
| } |
| #endif |
| return x; |
| } |
| |
| bool SkCanvas::getClipBounds(SkRect* bounds, EdgeType et) const { |
| SkIRect ibounds; |
| if (!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 if we are antialiasing |
| int inset = (kAA_EdgeType == et); |
| |
| // SkRect::iset() will correctly assert if we pass a value out of range |
| // (when SkScalar==fixed), so we pin to legal values. This does not |
| // really returnt the correct answer, but its the best we can do given |
| // that we've promised to return SkRect (even though we support devices |
| // that can be larger than 32K in width or height). |
| r.iset(pinIntForScalar(ibounds.fLeft - inset), |
| pinIntForScalar(ibounds.fTop - inset), |
| pinIntForScalar(ibounds.fRight + inset), |
| pinIntForScalar(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; |
| } |
| |
| SkCanvas::ClipType SkCanvas::getClipType() const { |
| if (fMCRec->fRasterClip->isEmpty()) return kEmpty_ClipType; |
| if (fMCRec->fRasterClip->isRect()) return kRect_ClipType; |
| return kComplex_ClipType; |
| } |
| |
| const SkRegion& SkCanvas::getTotalClip() const { |
| return fMCRec->fRasterClip->forceGetBW(); |
| } |
| |
| const SkClipStack& SkCanvas::getTotalClipStack() const { |
| return fClipStack; |
| } |
| |
| void SkCanvas::setExternalMatrix(const SkMatrix* matrix) { |
| if (NULL == matrix || matrix->isIdentity()) { |
| if (fUseExternalMatrix) { |
| fDeviceCMDirty = true; |
| } |
| fUseExternalMatrix = false; |
| } else { |
| fUseExternalMatrix = true; |
| fDeviceCMDirty = true; // |= (fExternalMatrix != *matrix) |
| |
| fExternalMatrix = *matrix; |
| matrix->invert(&fExternalInverse); |
| } |
| } |
| |
| SkDevice* SkCanvas::createLayerDevice(SkBitmap::Config config, |
| int width, int height, |
| bool isOpaque) { |
| SkDevice* device = this->getTopDevice(); |
| if (device) { |
| return device->createCompatibleDeviceForSaveLayer(config, width, height, |
| isOpaque); |
| } else { |
| return NULL; |
| } |
| } |
| |
| SkDevice* SkCanvas::createCompatibleDevice(SkBitmap::Config config, |
| int width, int height, |
| bool isOpaque) { |
| SkDevice* device = this->getDevice(); |
| if (device) { |
| return device->createCompatibleDevice(config, width, height, isOpaque); |
| } else { |
| return NULL; |
| } |
| } |
| |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // These are the virtual drawing methods |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| void SkCanvas::clear(SkColor color) { |
| SkDrawIter iter(this); |
| |
| while (iter.next()) { |
| iter.fDevice->clear(color); |
| } |
| } |
| |
| void SkCanvas::drawPaint(const SkPaint& paint) { |
| this->internalDrawPaint(paint); |
| } |
| |
| void SkCanvas::internalDrawPaint(const SkPaint& paint) { |
| LOOPER_BEGIN(paint, SkDrawFilter::kPaint_Type) |
| |
| 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; |
| } |
| |
| SkASSERT(pts != NULL); |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kPoint_Type) |
| |
| while (iter.next()) { |
| iter.fDevice->drawPoints(iter, mode, count, pts, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawRect(const SkRect& r, const SkPaint& paint) { |
| if (paint.canComputeFastBounds()) { |
| SkRect storage; |
| if (this->quickReject(paint.computeFastBounds(r, &storage), |
| paint2EdgeType(&paint))) { |
| return; |
| } |
| } |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kRect_Type) |
| |
| while (iter.next()) { |
| iter.fDevice->drawRect(iter, r, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawPath(const SkPath& path, const SkPaint& paint) { |
| if (!path.isInverseFillType() && paint.canComputeFastBounds()) { |
| SkRect storage; |
| const SkRect& bounds = path.getBounds(); |
| if (this->quickReject(paint.computeFastBounds(bounds, &storage), |
| paint2EdgeType(&paint))) { |
| return; |
| } |
| } |
| if (path.isEmpty()) { |
| if (path.isInverseFillType()) { |
| this->internalDrawPaint(paint); |
| } |
| return; |
| } |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kPath_Type) |
| |
| 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, paint2EdgeType(paint))) { |
| return; |
| } |
| } |
| |
| SkMatrix matrix; |
| matrix.setTranslate(x, y); |
| this->internalDrawBitmap(bitmap, NULL, matrix, paint); |
| } |
| |
| // this one is non-virtual, so it can be called safely by other canvas apis |
| void SkCanvas::internalDrawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, |
| const SkRect& dst, const SkPaint* paint) { |
| if (bitmap.width() == 0 || bitmap.height() == 0 || dst.isEmpty()) { |
| return; |
| } |
| |
| // do this now, to avoid the cost of calling extract for RLE bitmaps |
| if (NULL == paint || paint->canComputeFastBounds()) { |
| SkRect storage; |
| const SkRect* bounds = &dst; |
| if (paint) { |
| bounds = &paint->computeFastBounds(dst, &storage); |
| } |
| if (this->quickReject(*bounds, paint2EdgeType(paint))) { |
| return; |
| } |
| } |
| |
| const SkBitmap* bitmapPtr = &bitmap; |
| |
| SkMatrix matrix; |
| SkRect tmpSrc; |
| if (src) { |
| tmpSrc.set(*src); |
| // if the extract process clipped off the top or left of the |
| // original, we adjust for that here to get the position right. |
| if (tmpSrc.fLeft > 0) { |
| tmpSrc.fRight -= tmpSrc.fLeft; |
| tmpSrc.fLeft = 0; |
| } |
| if (tmpSrc.fTop > 0) { |
| tmpSrc.fBottom -= tmpSrc.fTop; |
| tmpSrc.fTop = 0; |
| } |
| } else { |
| tmpSrc.set(0, 0, SkIntToScalar(bitmap.width()), |
| SkIntToScalar(bitmap.height())); |
| } |
| matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit); |
| |
| // ensure that src is "valid" before we pass it to our internal routines |
| // and to SkDevice. i.e. sure it is contained inside the original bitmap. |
| SkIRect tmpISrc; |
| if (src) { |
| tmpISrc.set(0, 0, bitmap.width(), bitmap.height()); |
| if (!tmpISrc.intersect(*src)) { |
| return; |
| } |
| src = &tmpISrc; |
| } |
| this->internalDrawBitmap(*bitmapPtr, src, matrix, paint); |
| } |
| |
| void SkCanvas::drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src, |
| const SkRect& dst, const SkPaint* paint) { |
| SkDEBUGCODE(bitmap.validate();) |
| this->internalDrawBitmapRect(bitmap, src, dst, paint); |
| } |
| |
| void SkCanvas::drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& matrix, |
| const SkPaint* paint) { |
| SkDEBUGCODE(bitmap.validate();) |
| this->internalDrawBitmap(bitmap, NULL, matrix, paint); |
| } |
| |
| void SkCanvas::commonDrawBitmap(const SkBitmap& bitmap, const SkIRect* srcRect, |
| const SkMatrix& matrix, const SkPaint& paint) { |
| SkDEBUGCODE(bitmap.validate();) |
| |
| LOOPER_BEGIN(paint, SkDrawFilter::kBitmap_Type) |
| |
| while (iter.next()) { |
| iter.fDevice->drawBitmap(iter, bitmap, srcRect, matrix, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::internalDrawBitmapNine(const SkBitmap& bitmap, |
| const SkIRect& center, const SkRect& dst, |
| const SkPaint* paint) { |
| if (NULL == paint || paint->canComputeFastBounds()) { |
| SkRect storage; |
| const SkRect* bounds = &dst; |
| if (paint) { |
| bounds = &paint->computeFastBounds(dst, &storage); |
| } |
| if (this->quickReject(*bounds, paint2EdgeType(paint))) { |
| 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 int32_t srcX[4] = { 0, c.fLeft, c.fRight, w }; |
| const int32_t srcY[4] = { 0, c.fTop, c.fBottom, 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]; |
| } |
| |
| SkIRect s; |
| SkRect d; |
| for (int y = 0; y < 3; y++) { |
| 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); |
| } |
| } |
| } |
| |
| 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); |
| } |
| |
| void SkCanvas::drawSprite(const SkBitmap& bitmap, int x, int y, |
| const SkPaint* paint) { |
| SkDEBUGCODE(bitmap.validate();) |
| |
| if (reject_bitmap(bitmap)) { |
| return; |
| } |
| |
| SkPaint tmp; |
| if (NULL == paint) { |
| paint = &tmp; |
| } |
| |
| LOOPER_BEGIN(*paint, SkDrawFilter::kBitmap_Type) |
| |
| while (iter.next()) { |
| iter.fDevice->drawSprite(iter, bitmap, x - iter.getX(), y - iter.getY(), |
| looper.paint()); |
| } |
| LOOPER_END |
| } |
| |
| class SkDeviceFilteredPaint { |
| public: |
| SkDeviceFilteredPaint(SkDevice* device, const SkPaint& paint) { |
| SkDevice::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) { |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type) |
| |
| 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) { |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type) |
| |
| 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) { |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type) |
| |
| 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) { |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type) |
| |
| while (iter.next()) { |
| iter.fDevice->drawTextOnPath(iter, text, byteLength, path, |
| matrix, looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| #ifdef SK_BUILD_FOR_ANDROID |
| void SkCanvas::drawPosTextOnPath(const void* text, size_t byteLength, |
| const SkPoint pos[], const SkPaint& paint, |
| const SkPath& path, const SkMatrix* matrix) { |
| LOOPER_BEGIN(paint, SkDrawFilter::kText_Type) |
| |
| while (iter.next()) { |
| iter.fDevice->drawPosTextOnPath(iter, text, byteLength, pos, |
| looper.paint(), path, matrix); |
| } |
| |
| LOOPER_END |
| } |
| #endif |
| |
| 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) { |
| LOOPER_BEGIN(paint, SkDrawFilter::kPath_Type) |
| |
| while (iter.next()) { |
| iter.fDevice->drawVertices(iter, vmode, vertexCount, verts, texs, |
| colors, xmode, indices, indexCount, |
| looper.paint()); |
| } |
| |
| LOOPER_END |
| } |
| |
| void SkCanvas::drawData(const void* data, size_t length) { |
| // do nothing. Subclasses may do something with the data |
| } |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // 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); |
| |
| if (paint.canComputeFastBounds()) { |
| SkRect storage; |
| if (this->quickReject(paint.computeFastBounds(r, &storage), |
| paint2EdgeType(&paint))) { |
| return; |
| } |
| } |
| |
| SkPath path; |
| path.addOval(r); |
| this->drawPath(path, 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), |
| paint2EdgeType(&paint))) { |
| return; |
| } |
| } |
| |
| SkPath path; |
| path.addRoundRect(r, rx, ry, SkPath::kCW_Direction); |
| this->drawPath(path, paint); |
| } else { |
| this->drawRect(r, paint); |
| } |
| } |
| |
| void SkCanvas::drawOval(const SkRect& oval, const SkPaint& paint) { |
| if (paint.canComputeFastBounds()) { |
| SkRect storage; |
| if (this->quickReject(paint.computeFastBounds(oval, &storage), |
| paint2EdgeType(&paint))) { |
| return; |
| } |
| } |
| |
| SkPath path; |
| path.addOval(oval); |
| this->drawPath(path, 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::drawPicture(SkPicture& picture) { |
| int saveCount = save(); |
| picture.draw(this); |
| restoreToCount(saveCount); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| 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(); |
| } |
| |
| SkDevice* 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(); } |
