/*
* 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 = SkMakeBitmapShader(*bitmapPtr, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode,
&matrix, kNever_SkCopyPixelsMode);
if (!s) {
return;
}
SkPaint paintWithShader(paint);
paintWithShader.setStyle(SkPaint::kFill_Style);
paintWithShader.setShader(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(SkShader::MakeBitmapShader(src->fBitmap, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode, nullptr));
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;
}
}