| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkBitmapDevice.h" |
| #include "SkDraw.h" |
| #include "SkGlyphRun.h" |
| #include "SkImageFilter.h" |
| #include "SkImageFilterCache.h" |
| #include "SkMakeUnique.h" |
| #include "SkMatrix.h" |
| #include "SkPaint.h" |
| #include "SkPath.h" |
| #include "SkPixmap.h" |
| #include "SkRasterClip.h" |
| #include "SkRasterHandleAllocator.h" |
| #include "SkShader.h" |
| #include "SkSpecialImage.h" |
| #include "SkStrikeCache.h" |
| #include "SkSurface.h" |
| #include "SkTLazy.h" |
| #include "SkVertices.h" |
| |
| struct Bounder { |
| SkRect fBounds; |
| bool fHasBounds; |
| |
| Bounder(const SkRect& r, const SkPaint& paint) { |
| if ((fHasBounds = paint.canComputeFastBounds())) { |
| fBounds = paint.computeFastBounds(r, &fBounds); |
| } |
| } |
| |
| bool hasBounds() const { return fHasBounds; } |
| const SkRect* bounds() const { return fHasBounds ? &fBounds : nullptr; } |
| operator const SkRect* () const { return this->bounds(); } |
| }; |
| |
| class SkDrawTiler { |
| enum { |
| // 8K is 1 too big, since 8K << supersample == 32768 which is too big for SkFixed |
| kMaxDim = 8192 - 1 |
| }; |
| |
| SkBitmapDevice* fDevice; |
| SkPixmap fRootPixmap; |
| SkIRect fSrcBounds; |
| |
| // Used for tiling and non-tiling |
| SkDraw fDraw; |
| |
| // fCurr... are only used if fNeedTiling |
| SkMatrix fTileMatrix; |
| SkRasterClip fTileRC; |
| SkIPoint fOrigin; |
| |
| bool fDone, fNeedsTiling; |
| |
| public: |
| static bool NeedsTiling(SkBitmapDevice* dev) { |
| return dev->width() > kMaxDim || dev->height() > kMaxDim; |
| } |
| |
| SkDrawTiler(SkBitmapDevice* dev, const SkRect* bounds) : fDevice(dev) { |
| fDone = false; |
| |
| // we need fDst to be set, and if we're actually drawing, to dirty the genID |
| if (!dev->accessPixels(&fRootPixmap)) { |
| // NoDrawDevice uses us (why?) so we have to catch this case w/ no pixels |
| fRootPixmap.reset(dev->imageInfo(), nullptr, 0); |
| } |
| |
| // do a quick check, so we don't even have to process "bounds" if there is no need |
| const SkIRect clipR = dev->fRCStack.rc().getBounds(); |
| fNeedsTiling = clipR.right() > kMaxDim || clipR.bottom() > kMaxDim; |
| if (fNeedsTiling) { |
| if (bounds) { |
| // Make sure we round first, and then intersect. We can't rely on promoting the |
| // clipR to floats (and then intersecting with devBounds) since promoting |
| // int --> float can make the float larger than the int. |
| // rounding(out) first runs the risk of clamping if the float is larger an intmax |
| // but our roundOut() is saturating, which is fine for this use case |
| // |
| // e.g. the older version of this code did this: |
| // devBounds = mapRect(bounds); |
| // if (devBounds.intersect(SkRect::Make(clipR))) { |
| // fSrcBounds = devBounds.roundOut(); |
| // The problem being that the promotion of clipR to SkRect was unreliable |
| // |
| fSrcBounds = dev->ctm().mapRect(*bounds).roundOut(); |
| if (fSrcBounds.intersect(clipR)) { |
| // Check again, now that we have computed srcbounds. |
| fNeedsTiling = fSrcBounds.right() > kMaxDim || fSrcBounds.bottom() > kMaxDim; |
| } else { |
| fNeedsTiling = false; |
| fDone = true; |
| } |
| } else { |
| fSrcBounds = clipR; |
| } |
| } |
| |
| if (fNeedsTiling) { |
| // fDraw.fDst is reset each time in setupTileDraw() |
| fDraw.fMatrix = &fTileMatrix; |
| fDraw.fRC = &fTileRC; |
| // we'll step/increase it before using it |
| fOrigin.set(fSrcBounds.fLeft - kMaxDim, fSrcBounds.fTop); |
| } else { |
| // don't reference fSrcBounds, as it may not have been set |
| fDraw.fDst = fRootPixmap; |
| fDraw.fMatrix = &dev->ctm(); |
| fDraw.fRC = &dev->fRCStack.rc(); |
| fOrigin.set(0, 0); |
| |
| fDraw.fCoverage = dev->accessCoverage(); |
| } |
| } |
| |
| bool needsTiling() const { return fNeedsTiling; } |
| |
| const SkDraw* next() { |
| if (fDone) { |
| return nullptr; |
| } |
| if (fNeedsTiling) { |
| do { |
| this->stepAndSetupTileDraw(); // might set the clip to empty and fDone to true |
| } while (!fDone && fTileRC.isEmpty()); |
| // if we exit the loop and we're still empty, we're (past) done |
| if (fTileRC.isEmpty()) { |
| SkASSERT(fDone); |
| return nullptr; |
| } |
| SkASSERT(!fTileRC.isEmpty()); |
| } else { |
| fDone = true; // only draw untiled once |
| } |
| return &fDraw; |
| } |
| |
| private: |
| void stepAndSetupTileDraw() { |
| SkASSERT(!fDone); |
| SkASSERT(fNeedsTiling); |
| |
| // We do fRootPixmap.width() - kMaxDim instead of fOrigin.fX + kMaxDim to avoid overflow. |
| if (fOrigin.fX >= fSrcBounds.fRight - kMaxDim) { // too far |
| fOrigin.fX = fSrcBounds.fLeft; |
| fOrigin.fY += kMaxDim; |
| } else { |
| fOrigin.fX += kMaxDim; |
| } |
| // fDone = next origin will be invalid. |
| fDone = fOrigin.fX >= fSrcBounds.fRight - kMaxDim && |
| fOrigin.fY >= fSrcBounds.fBottom - kMaxDim; |
| |
| SkIRect bounds = SkIRect::MakeXYWH(fOrigin.x(), fOrigin.y(), kMaxDim, kMaxDim); |
| SkASSERT(!bounds.isEmpty()); |
| bool success = fRootPixmap.extractSubset(&fDraw.fDst, bounds); |
| SkASSERT_RELEASE(success); |
| // now don't use bounds, since fDst has the clipped dimensions. |
| |
| fTileMatrix = fDevice->ctm(); |
| fTileMatrix.postTranslate(SkIntToScalar(-fOrigin.x()), SkIntToScalar(-fOrigin.y())); |
| fDevice->fRCStack.rc().translate(-fOrigin.x(), -fOrigin.y(), &fTileRC); |
| fTileRC.op(SkIRect::MakeWH(fDraw.fDst.width(), fDraw.fDst.height()), |
| SkRegion::kIntersect_Op); |
| } |
| }; |
| |
| // Passing a bounds allows the tiler to only visit the dst-tiles that might intersect the |
| // drawing. If null is passed, the tiler has to visit everywhere. The bounds is expected to be |
| // in local coordinates, as the tiler itself will transform that into device coordinates. |
| // |
| #define LOOP_TILER(code, boundsPtr) \ |
| SkDrawTiler priv_tiler(this, boundsPtr); \ |
| while (const SkDraw* priv_draw = priv_tiler.next()) { \ |
| priv_draw->code; \ |
| } |
| |
| // Helper to create an SkDraw from a device |
| class SkBitmapDevice::BDDraw : public SkDraw { |
| public: |
| BDDraw(SkBitmapDevice* dev) { |
| // we need fDst to be set, and if we're actually drawing, to dirty the genID |
| if (!dev->accessPixels(&fDst)) { |
| // NoDrawDevice uses us (why?) so we have to catch this case w/ no pixels |
| fDst.reset(dev->imageInfo(), nullptr, 0); |
| } |
| fMatrix = &dev->ctm(); |
| fRC = &dev->fRCStack.rc(); |
| fCoverage = dev->accessCoverage(); |
| } |
| }; |
| |
| static bool valid_for_bitmap_device(const SkImageInfo& info, |
| SkAlphaType* newAlphaType) { |
| if (info.width() < 0 || info.height() < 0 || kUnknown_SkColorType == info.colorType()) { |
| return false; |
| } |
| |
| if (newAlphaType) { |
| *newAlphaType = SkColorTypeIsAlwaysOpaque(info.colorType()) ? kOpaque_SkAlphaType |
| : info.alphaType(); |
| } |
| |
| return true; |
| } |
| |
| SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap) |
| : INHERITED(bitmap.info(), SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType)) |
| , fBitmap(bitmap) |
| , fRCStack(bitmap.width(), bitmap.height()) |
| , fGlyphPainter(this->surfaceProps(), |
| bitmap.colorType(), |
| bitmap.colorSpace(), |
| SkStrikeCache::GlobalStrikeCache()) { |
| SkASSERT(valid_for_bitmap_device(bitmap.info(), nullptr)); |
| } |
| |
| SkBitmapDevice* SkBitmapDevice::Create(const SkImageInfo& info) { |
| return Create(info, SkSurfaceProps(SkSurfaceProps::kLegacyFontHost_InitType)); |
| } |
| |
| SkBitmapDevice::SkBitmapDevice(const SkBitmap& bitmap, const SkSurfaceProps& surfaceProps, |
| SkRasterHandleAllocator::Handle hndl, const SkBitmap* coverage) |
| : INHERITED(bitmap.info(), surfaceProps) |
| , fBitmap(bitmap) |
| , fRasterHandle(hndl) |
| , fRCStack(bitmap.width(), bitmap.height()) |
| , fGlyphPainter(this->surfaceProps(), |
| bitmap.colorType(), |
| bitmap.colorSpace(), |
| SkStrikeCache::GlobalStrikeCache()) { |
| SkASSERT(valid_for_bitmap_device(bitmap.info(), nullptr)); |
| |
| if (coverage) { |
| SkASSERT(coverage->width() == bitmap.width()); |
| SkASSERT(coverage->height() == bitmap.height()); |
| fCoverage = skstd::make_unique<SkBitmap>(*coverage); |
| } |
| } |
| |
| SkBitmapDevice* SkBitmapDevice::Create(const SkImageInfo& origInfo, |
| const SkSurfaceProps& surfaceProps, |
| bool trackCoverage, |
| SkRasterHandleAllocator* allocator) { |
| SkAlphaType newAT = origInfo.alphaType(); |
| if (!valid_for_bitmap_device(origInfo, &newAT)) { |
| return nullptr; |
| } |
| |
| SkRasterHandleAllocator::Handle hndl = nullptr; |
| const SkImageInfo info = origInfo.makeAlphaType(newAT); |
| SkBitmap bitmap; |
| |
| if (kUnknown_SkColorType == info.colorType()) { |
| if (!bitmap.setInfo(info)) { |
| return nullptr; |
| } |
| } else if (allocator) { |
| hndl = allocator->allocBitmap(info, &bitmap); |
| if (!hndl) { |
| return nullptr; |
| } |
| } else if (info.isOpaque()) { |
| // If this bitmap is opaque, we don't have any sensible default color, |
| // so we just return uninitialized pixels. |
| if (!bitmap.tryAllocPixels(info)) { |
| return nullptr; |
| } |
| } else { |
| // This bitmap has transparency, so we'll zero the pixels (to transparent). |
| // We use the flag as a faster alloc-then-eraseColor(SK_ColorTRANSPARENT). |
| if (!bitmap.tryAllocPixelsFlags(info, SkBitmap::kZeroPixels_AllocFlag)) { |
| return nullptr; |
| } |
| } |
| |
| SkBitmap coverage; |
| if (trackCoverage) { |
| SkImageInfo ci = SkImageInfo::Make(info.width(), info.height(), kAlpha_8_SkColorType, |
| kPremul_SkAlphaType); |
| if (!coverage.tryAllocPixelsFlags(ci, SkBitmap::kZeroPixels_AllocFlag)) { |
| return nullptr; |
| } |
| } |
| |
| return new SkBitmapDevice(bitmap, surfaceProps, hndl, trackCoverage ? &coverage : nullptr); |
| } |
| |
| void SkBitmapDevice::replaceBitmapBackendForRasterSurface(const SkBitmap& bm) { |
| SkASSERT(bm.width() == fBitmap.width()); |
| SkASSERT(bm.height() == fBitmap.height()); |
| fBitmap = bm; // intent is to use bm's pixelRef (and rowbytes/config) |
| this->privateResize(fBitmap.info().width(), fBitmap.info().height()); |
| } |
| |
| SkBaseDevice* SkBitmapDevice::onCreateDevice(const CreateInfo& cinfo, const SkPaint*) { |
| const SkSurfaceProps surfaceProps(this->surfaceProps().flags(), cinfo.fPixelGeometry); |
| return SkBitmapDevice::Create(cinfo.fInfo, surfaceProps, cinfo.fTrackCoverage, |
| cinfo.fAllocator); |
| } |
| |
| bool SkBitmapDevice::onAccessPixels(SkPixmap* pmap) { |
| if (this->onPeekPixels(pmap)) { |
| fBitmap.notifyPixelsChanged(); |
| return true; |
| } |
| return false; |
| } |
| |
| bool SkBitmapDevice::onPeekPixels(SkPixmap* pmap) { |
| const SkImageInfo info = fBitmap.info(); |
| if (fBitmap.getPixels() && (kUnknown_SkColorType != info.colorType())) { |
| pmap->reset(fBitmap.info(), fBitmap.getPixels(), fBitmap.rowBytes()); |
| return true; |
| } |
| return false; |
| } |
| |
| bool SkBitmapDevice::onWritePixels(const SkPixmap& pm, int x, int y) { |
| // since we don't stop creating un-pixeled devices yet, check for no pixels here |
| if (nullptr == fBitmap.getPixels()) { |
| return false; |
| } |
| |
| if (fBitmap.writePixels(pm, x, y)) { |
| fBitmap.notifyPixelsChanged(); |
| return true; |
| } |
| return false; |
| } |
| |
| bool SkBitmapDevice::onReadPixels(const SkPixmap& pm, int x, int y) { |
| return fBitmap.readPixels(pm, x, y); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| void SkBitmapDevice::drawPaint(const SkPaint& paint) { |
| BDDraw(this).drawPaint(paint); |
| } |
| |
| void SkBitmapDevice::drawPoints(SkCanvas::PointMode mode, size_t count, |
| const SkPoint pts[], const SkPaint& paint) { |
| LOOP_TILER( drawPoints(mode, count, pts, paint, nullptr), nullptr) |
| } |
| |
| void SkBitmapDevice::drawRect(const SkRect& r, const SkPaint& paint) { |
| LOOP_TILER( drawRect(r, paint), Bounder(r, paint)) |
| } |
| |
| void SkBitmapDevice::drawOval(const SkRect& oval, const SkPaint& paint) { |
| SkPath path; |
| path.addOval(oval); |
| // call the VIRTUAL version, so any subclasses who do handle drawPath aren't |
| // required to override drawOval. |
| this->drawPath(path, paint, true); |
| } |
| |
| void SkBitmapDevice::drawRRect(const SkRRect& rrect, const SkPaint& paint) { |
| #ifdef SK_IGNORE_BLURRED_RRECT_OPT |
| SkPath path; |
| |
| path.addRRect(rrect); |
| // call the VIRTUAL version, so any subclasses who do handle drawPath aren't |
| // required to override drawRRect. |
| this->drawPath(path, paint, true); |
| #else |
| LOOP_TILER( drawRRect(rrect, paint), Bounder(rrect.getBounds(), paint)) |
| #endif |
| } |
| |
| void SkBitmapDevice::drawPath(const SkPath& path, |
| const SkPaint& paint, |
| bool pathIsMutable) { |
| const SkRect* bounds = nullptr; |
| if (SkDrawTiler::NeedsTiling(this) && !path.isInverseFillType()) { |
| bounds = &path.getBounds(); |
| } |
| SkDrawTiler tiler(this, bounds ? Bounder(*bounds, paint).bounds() : nullptr); |
| if (tiler.needsTiling()) { |
| pathIsMutable = false; |
| } |
| while (const SkDraw* draw = tiler.next()) { |
| draw->drawPath(path, paint, nullptr, pathIsMutable); |
| } |
| } |
| |
| void SkBitmapDevice::drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix, |
| const SkRect* dstOrNull, const SkPaint& paint) { |
| const SkRect* bounds = dstOrNull; |
| SkRect storage; |
| if (!bounds && SkDrawTiler::NeedsTiling(this)) { |
| matrix.mapRect(&storage, SkRect::MakeIWH(bitmap.width(), bitmap.height())); |
| Bounder b(storage, paint); |
| if (b.hasBounds()) { |
| storage = *b.bounds(); |
| bounds = &storage; |
| } |
| } |
| LOOP_TILER(drawBitmap(bitmap, matrix, dstOrNull, paint), bounds) |
| } |
| |
| static inline bool CanApplyDstMatrixAsCTM(const SkMatrix& m, const SkPaint& paint) { |
| if (!paint.getMaskFilter()) { |
| return true; |
| } |
| |
| // Some mask filters parameters (sigma) depend on the CTM/scale. |
| return m.getType() <= SkMatrix::kTranslate_Mask; |
| } |
| |
| void SkBitmapDevice::drawBitmapRect(const SkBitmap& bitmap, |
| const SkRect* src, const SkRect& dst, |
| const SkPaint& paint, SkCanvas::SrcRectConstraint constraint) { |
| SkASSERT(dst.isFinite()); |
| SkASSERT(dst.isSorted()); |
| |
| SkMatrix matrix; |
| SkRect bitmapBounds, tmpSrc, tmpDst; |
| SkBitmap tmpBitmap; |
| |
| bitmapBounds.isetWH(bitmap.width(), bitmap.height()); |
| |
| // Compute matrix from the two rectangles |
| if (src) { |
| tmpSrc = *src; |
| } else { |
| tmpSrc = bitmapBounds; |
| } |
| matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit); |
| |
| LogDrawScaleFactor(this->ctm(), matrix, paint.getFilterQuality()); |
| |
| const SkRect* dstPtr = &dst; |
| const SkBitmap* bitmapPtr = &bitmap; |
| |
| // clip the tmpSrc to the bounds of the bitmap, and recompute dstRect if |
| // needed (if the src was clipped). No check needed if src==null. |
| if (src) { |
| if (!bitmapBounds.contains(*src)) { |
| if (!tmpSrc.intersect(bitmapBounds)) { |
| return; // nothing to draw |
| } |
| // recompute dst, based on the smaller tmpSrc |
| matrix.mapRect(&tmpDst, tmpSrc); |
| if (!tmpDst.isFinite()) { |
| return; |
| } |
| dstPtr = &tmpDst; |
| } |
| } |
| |
| if (src && !src->contains(bitmapBounds) && |
| SkCanvas::kFast_SrcRectConstraint == constraint && |
| paint.getFilterQuality() != kNone_SkFilterQuality) { |
| // src is smaller than the bounds of the bitmap, and we are filtering, so we don't know |
| // how much more of the bitmap we need, so we can't use extractSubset or drawBitmap, |
| // but we must use a shader w/ dst bounds (which can access all of the bitmap needed). |
| goto USE_SHADER; |
| } |
| |
| if (src) { |
| // since we may need to clamp to the borders of the src rect within |
| // the bitmap, we extract a subset. |
| const SkIRect srcIR = tmpSrc.roundOut(); |
| if (!bitmap.extractSubset(&tmpBitmap, srcIR)) { |
| return; |
| } |
| bitmapPtr = &tmpBitmap; |
| |
| // Since we did an extract, we need to adjust the matrix accordingly |
| SkScalar dx = 0, dy = 0; |
| if (srcIR.fLeft > 0) { |
| dx = SkIntToScalar(srcIR.fLeft); |
| } |
| if (srcIR.fTop > 0) { |
| dy = SkIntToScalar(srcIR.fTop); |
| } |
| if (dx || dy) { |
| matrix.preTranslate(dx, dy); |
| } |
| |
| #ifdef SK_DRAWBITMAPRECT_FAST_OFFSET |
| SkRect extractedBitmapBounds = SkRect::MakeXYWH(dx, dy, |
| SkIntToScalar(bitmapPtr->width()), |
| SkIntToScalar(bitmapPtr->height())); |
| #else |
| SkRect extractedBitmapBounds; |
| extractedBitmapBounds.isetWH(bitmapPtr->width(), bitmapPtr->height()); |
| #endif |
| if (extractedBitmapBounds == tmpSrc) { |
| // no fractional part in src, we can just call drawBitmap |
| goto USE_DRAWBITMAP; |
| } |
| } else { |
| USE_DRAWBITMAP: |
| // We can go faster by just calling drawBitmap, which will concat the |
| // matrix with the CTM, and try to call drawSprite if it can. If not, |
| // it will make a shader and call drawRect, as we do below. |
| if (CanApplyDstMatrixAsCTM(matrix, paint)) { |
| this->drawBitmap(*bitmapPtr, matrix, dstPtr, paint); |
| return; |
| } |
| } |
| |
| USE_SHADER: |
| |
| // TODO(herb): Move this over to SkArenaAlloc when arena alloc has a facility to return sk_sps. |
| // Since the shader need only live for our stack-frame, pass in a custom allocator. This |
| // can save malloc calls, and signals to SkMakeBitmapShader to not try to copy the bitmap |
| // if its mutable, since that precaution is not needed (give the short lifetime of the shader). |
| |
| // construct a shader, so we can call drawRect with the dst |
| auto s = SkMakeBitmapShaderForPaint(paint, *bitmapPtr, SkTileMode::kClamp, |
| SkTileMode::kClamp, &matrix, kNever_SkCopyPixelsMode); |
| if (!s) { |
| return; |
| } |
| |
| SkPaint paintWithShader(paint); |
| paintWithShader.setStyle(SkPaint::kFill_Style); |
| paintWithShader.setShader(std::move(s)); |
| |
| // Call ourself, in case the subclass wanted to share this setup code |
| // but handle the drawRect code themselves. |
| this->drawRect(*dstPtr, paintWithShader); |
| } |
| |
| void SkBitmapDevice::drawSprite(const SkBitmap& bitmap, int x, int y, const SkPaint& paint) { |
| BDDraw(this).drawSprite(bitmap, x, y, paint); |
| } |
| |
| void SkBitmapDevice::drawGlyphRunList(const SkGlyphRunList& glyphRunList) { |
| LOOP_TILER( drawGlyphRunList(glyphRunList, &fGlyphPainter), nullptr ) |
| } |
| |
| void SkBitmapDevice::drawVertices(const SkVertices* vertices, const SkVertices::Bone bones[], |
| int boneCount, SkBlendMode bmode, const SkPaint& paint) { |
| BDDraw(this).drawVertices(vertices->mode(), vertices->vertexCount(), vertices->positions(), |
| vertices->texCoords(), vertices->colors(), vertices->boneIndices(), |
| vertices->boneWeights(), bmode, vertices->indices(), |
| vertices->indexCount(), paint, bones, boneCount); |
| } |
| |
| void SkBitmapDevice::drawDevice(SkBaseDevice* device, int x, int y, const SkPaint& origPaint) { |
| SkASSERT(!origPaint.getImageFilter()); |
| |
| // todo: can we unify with similar adjustment in SkGpuDevice? |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| if (paint->getMaskFilter()) { |
| paint.writable()->setMaskFilter(paint->getMaskFilter()->makeWithMatrix(this->ctm())); |
| } |
| |
| // hack to test coverage |
| SkBitmapDevice* src = static_cast<SkBitmapDevice*>(device); |
| if (src->fCoverage) { |
| SkDraw draw; |
| draw.fDst = fBitmap.pixmap(); |
| draw.fMatrix = &SkMatrix::I(); |
| draw.fRC = &fRCStack.rc(); |
| SkPaint paint(origPaint); |
| paint.setShader(src->fBitmap.makeShader()); |
| draw.drawBitmap(*src->fCoverage.get(), |
| SkMatrix::MakeTrans(SkIntToScalar(x),SkIntToScalar(y)), nullptr, paint); |
| } else { |
| this->drawSprite(src->fBitmap, x, y, *paint); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| namespace { |
| |
| class SkAutoDeviceClipRestore { |
| public: |
| SkAutoDeviceClipRestore(SkBaseDevice* device, const SkIRect& clip) |
| : fDevice(device) |
| , fPrevCTM(device->ctm()) { |
| fDevice->save(); |
| fDevice->setCTM(SkMatrix::I()); |
| fDevice->clipRect(SkRect::Make(clip), SkClipOp::kIntersect, false); |
| fDevice->setCTM(fPrevCTM); |
| } |
| |
| ~SkAutoDeviceClipRestore() { |
| fDevice->restore(fPrevCTM); |
| } |
| |
| private: |
| SkBaseDevice* fDevice; |
| const SkMatrix fPrevCTM; |
| }; |
| |
| } // anonymous ns |
| |
| void SkBitmapDevice::drawSpecial(SkSpecialImage* src, int x, int y, const SkPaint& origPaint, |
| SkImage* clipImage, const SkMatrix& clipMatrix) { |
| SkASSERT(!src->isTextureBacked()); |
| |
| sk_sp<SkSpecialImage> filteredImage; |
| SkTCopyOnFirstWrite<SkPaint> paint(origPaint); |
| |
| if (SkImageFilter* filter = paint->getImageFilter()) { |
| SkIPoint offset = SkIPoint::Make(0, 0); |
| const SkMatrix matrix = SkMatrix::Concat( |
| SkMatrix::MakeTrans(SkIntToScalar(-x), SkIntToScalar(-y)), this->ctm()); |
| const SkIRect clipBounds = fRCStack.rc().getBounds().makeOffset(-x, -y); |
| sk_sp<SkImageFilterCache> cache(this->getImageFilterCache()); |
| SkImageFilter::OutputProperties outputProperties(fBitmap.colorType(), fBitmap.colorSpace()); |
| SkImageFilter::Context ctx(matrix, clipBounds, cache.get(), outputProperties); |
| |
| filteredImage = filter->filterImage(src, ctx, &offset); |
| if (!filteredImage) { |
| return; |
| } |
| |
| src = filteredImage.get(); |
| paint.writable()->setImageFilter(nullptr); |
| x += offset.x(); |
| y += offset.y(); |
| } |
| |
| if (paint->getMaskFilter()) { |
| paint.writable()->setMaskFilter(paint->getMaskFilter()->makeWithMatrix(this->ctm())); |
| } |
| |
| if (!clipImage) { |
| SkBitmap resultBM; |
| if (src->getROPixels(&resultBM)) { |
| this->drawSprite(resultBM, x, y, *paint); |
| } |
| return; |
| } |
| |
| // Clip image case. |
| sk_sp<SkImage> srcImage(src->asImage()); |
| if (!srcImage) { |
| return; |
| } |
| |
| const SkMatrix totalMatrix = SkMatrix::Concat(this->ctm(), clipMatrix); |
| SkRect clipBounds; |
| totalMatrix.mapRect(&clipBounds, SkRect::Make(clipImage->bounds())); |
| const SkIRect srcBounds = srcImage->bounds().makeOffset(x, y); |
| |
| SkIRect maskBounds = fRCStack.rc().getBounds(); |
| if (!maskBounds.intersect(clipBounds.roundOut()) || !maskBounds.intersect(srcBounds)) { |
| return; |
| } |
| |
| sk_sp<SkImage> mask; |
| SkMatrix maskMatrix, shaderMatrix; |
| SkTLazy<SkAutoDeviceClipRestore> autoClipRestore; |
| |
| SkMatrix totalInverse; |
| if (clipImage->isAlphaOnly() && totalMatrix.invert(&totalInverse)) { |
| // If the mask is already in A8 format, we can draw it directly |
| // (while compensating in the shader matrix). |
| mask = sk_ref_sp(clipImage); |
| maskMatrix = totalMatrix; |
| shaderMatrix = SkMatrix::Concat(totalInverse, SkMatrix::MakeTrans(x, y)); |
| |
| // If the mask is not fully contained within the src layer, we must clip. |
| if (!srcBounds.contains(clipBounds)) { |
| autoClipRestore.init(this, srcBounds); |
| } |
| |
| maskBounds.offsetTo(0, 0); |
| } else { |
| // Otherwise, we convert the mask to A8 explicitly. |
| sk_sp<SkSurface> surf = SkSurface::MakeRaster(SkImageInfo::MakeA8(maskBounds.width(), |
| maskBounds.height())); |
| SkCanvas* canvas = surf->getCanvas(); |
| canvas->translate(-maskBounds.x(), -maskBounds.y()); |
| canvas->concat(totalMatrix); |
| canvas->drawImage(clipImage, 0, 0); |
| |
| mask = surf->makeImageSnapshot(); |
| maskMatrix = SkMatrix::I(); |
| shaderMatrix = SkMatrix::MakeTrans(x - maskBounds.x(), y - maskBounds.y()); |
| } |
| |
| SkAutoDeviceCTMRestore adctmr(this, maskMatrix); |
| paint.writable()->setShader(srcImage->makeShader(&shaderMatrix)); |
| this->drawImageRect(mask.get(), nullptr, |
| SkRect::MakeXYWH(maskBounds.x(), maskBounds.y(), |
| mask->width(), mask->height()), |
| *paint, SkCanvas::kFast_SrcRectConstraint); |
| } |
| |
| sk_sp<SkSpecialImage> SkBitmapDevice::makeSpecial(const SkBitmap& bitmap) { |
| return SkSpecialImage::MakeFromRaster(bitmap.bounds(), bitmap); |
| } |
| |
| sk_sp<SkSpecialImage> SkBitmapDevice::makeSpecial(const SkImage* image) { |
| return SkSpecialImage::MakeFromImage(nullptr, SkIRect::MakeWH(image->width(), image->height()), |
| image->makeNonTextureImage()); |
| } |
| |
| sk_sp<SkSpecialImage> SkBitmapDevice::snapSpecial() { |
| return this->makeSpecial(fBitmap); |
| } |
| |
| sk_sp<SkSpecialImage> SkBitmapDevice::snapBackImage(const SkIRect& bounds) { |
| return SkSpecialImage::CopyFromRaster(bounds, fBitmap, &this->surfaceProps()); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| sk_sp<SkSurface> SkBitmapDevice::makeSurface(const SkImageInfo& info, const SkSurfaceProps& props) { |
| return SkSurface::MakeRaster(info, &props); |
| } |
| |
| SkImageFilterCache* SkBitmapDevice::getImageFilterCache() { |
| SkImageFilterCache* cache = SkImageFilterCache::Get(); |
| cache->ref(); |
| return cache; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| void SkBitmapDevice::onSave() { |
| fRCStack.save(); |
| } |
| |
| void SkBitmapDevice::onRestore() { |
| fRCStack.restore(); |
| } |
| |
| void SkBitmapDevice::onClipRect(const SkRect& rect, SkClipOp op, bool aa) { |
| fRCStack.clipRect(this->ctm(), rect, op, aa); |
| } |
| |
| void SkBitmapDevice::onClipRRect(const SkRRect& rrect, SkClipOp op, bool aa) { |
| fRCStack.clipRRect(this->ctm(), rrect, op, aa); |
| } |
| |
| void SkBitmapDevice::onClipPath(const SkPath& path, SkClipOp op, bool aa) { |
| fRCStack.clipPath(this->ctm(), path, op, aa); |
| } |
| |
| void SkBitmapDevice::onClipRegion(const SkRegion& rgn, SkClipOp op) { |
| SkIPoint origin = this->getOrigin(); |
| SkRegion tmp; |
| const SkRegion* ptr = &rgn; |
| if (origin.fX | origin.fY) { |
| // translate from "global/canvas" coordinates to relative to this device |
| rgn.translate(-origin.fX, -origin.fY, &tmp); |
| ptr = &tmp; |
| } |
| fRCStack.clipRegion(*ptr, op); |
| } |
| |
| void SkBitmapDevice::onSetDeviceClipRestriction(SkIRect* mutableClipRestriction) { |
| fRCStack.setDeviceClipRestriction(mutableClipRestriction); |
| if (!mutableClipRestriction->isEmpty()) { |
| SkRegion rgn(*mutableClipRestriction); |
| fRCStack.clipRegion(rgn, SkClipOp::kIntersect); |
| } |
| } |
| |
| bool SkBitmapDevice::onClipIsAA() const { |
| const SkRasterClip& rc = fRCStack.rc(); |
| return !rc.isEmpty() && rc.isAA(); |
| } |
| |
| void SkBitmapDevice::onAsRgnClip(SkRegion* rgn) const { |
| const SkRasterClip& rc = fRCStack.rc(); |
| if (rc.isAA()) { |
| rgn->setRect(rc.getBounds()); |
| } else { |
| *rgn = rc.bwRgn(); |
| } |
| } |
| |
| void SkBitmapDevice::validateDevBounds(const SkIRect& drawClipBounds) { |
| #ifdef SK_DEBUG |
| const SkIRect& stackBounds = fRCStack.rc().getBounds(); |
| SkASSERT(drawClipBounds == stackBounds); |
| #endif |
| } |
| |
| SkBaseDevice::ClipType SkBitmapDevice::onGetClipType() const { |
| const SkRasterClip& rc = fRCStack.rc(); |
| if (rc.isEmpty()) { |
| return kEmpty_ClipType; |
| } else if (rc.isRect()) { |
| return kRect_ClipType; |
| } else { |
| return kComplex_ClipType; |
| } |
| } |
