/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkDeferredCanvas.h"
#include "SkDrawable.h"
#include "SkPath.h"
#include "SkRSXform.h"
#include "SkRRect.h"
#include "SkSurface.h"
#include "SkTextBlob.h"
#include "SkClipOpPriv.h"
bool SkDeferredCanvas::Rec::isConcat(SkMatrix* m) const {
switch (fType) {
case kTrans_Type:
m->setTranslate(fData.fTranslate.x(), fData.fTranslate.y());
return true;
case kScaleTrans_Type:
m->setScaleTranslate(fData.fScaleTrans.fScale.x(),
fData.fScaleTrans.fScale.y(),
fData.fScaleTrans.fTrans.x(),
fData.fScaleTrans.fTrans.y());
return true;
default:
break;
}
return false;
}
void SkDeferredCanvas::Rec::setConcat(const SkMatrix& m) {
SkASSERT(m.getType() <= (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask));
if (m.getType() <= SkMatrix::kTranslate_Mask) {
fType = kTrans_Type;
fData.fTranslate.set(m.getTranslateX(), m.getTranslateY());
} else {
fType = kScaleTrans_Type;
fData.fScaleTrans.fScale.set(m.getScaleX(), m.getScaleY());
fData.fScaleTrans.fTrans.set(m.getTranslateX(), m.getTranslateY());
}
}
///////////////////////////////////////////////////////////////////////////////////////////////////
SkDeferredCanvas::SkDeferredCanvas(SkCanvas* canvas, EvalType evalType)
: INHERITED(canvas->getBaseLayerSize().width(), canvas->getBaseLayerSize().height())
, fCanvas(nullptr) // must be here for reset to work.
, fEvalType(evalType)
{
this->reset(canvas);
}
SkDeferredCanvas::~SkDeferredCanvas() {}
void SkDeferredCanvas::reset(SkCanvas* canvas) {
if (fCanvas) {
this->flush();
fCanvas = nullptr;
}
fRecs.reset();
if (canvas) {
this->resetForNextPicture(SkIRect::MakeSize(canvas->getBaseLayerSize()));
fCanvas = canvas;
}
}
void SkDeferredCanvas::push_save() {
Rec* r = fRecs.append();
r->fType = kSave_Type;
}
void SkDeferredCanvas::push_cliprect(const SkRect& bounds) {
int index = fRecs.count() - 1;
if (index >= 0 && fRecs[index].fType == kClipRect_Type) {
if (!fRecs[index].fData.fBounds.intersect(bounds)) {
fRecs[index].fData.fBounds.setEmpty();
}
} else {
Rec* r = fRecs.append();
r->fType = kClipRect_Type;
r->fData.fBounds = bounds;
}
}
bool SkDeferredCanvas::push_concat(const SkMatrix& mat) {
if (mat.getType() > (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) {
return false;
}
// At the moment, we don't know which ops can scale and which can also flip, so
// we reject negative scales for now
if (mat.getScaleX() < 0 || mat.getScaleY() < 0) {
return false;
}
int index = fRecs.count() - 1;
SkMatrix m;
if (index >= 0 && fRecs[index].isConcat(&m)) {
m.preConcat(mat);
fRecs[index].setConcat(m);
} else {
fRecs.append()->setConcat(mat);
}
return true;
}
void SkDeferredCanvas::emit(const Rec& rec) {
switch (rec.fType) {
case kSave_Type:
fCanvas->save();
this->INHERITED::willSave();
break;
case kClipRect_Type:
fCanvas->clipRect(rec.fData.fBounds);
this->INHERITED::onClipRect(rec.fData.fBounds,
kIntersect_SkClipOp, kHard_ClipEdgeStyle);
break;
case kTrans_Type:
case kScaleTrans_Type: {
SkMatrix mat;
rec.getConcat(&mat);
fCanvas->concat(mat);
this->INHERITED::didConcat(mat);
} break;
}
}
void SkDeferredCanvas::flush_le(int index) {
SkASSERT(index >= -1 && index < fRecs.count());
int count = index + 1;
for (int i = 0; i < count; ++i) {
this->emit(fRecs[i]);
}
fRecs.remove(0, count);
}
void SkDeferredCanvas::flush_all() {
this->flush_le(fRecs.count() - 1);
}
void SkDeferredCanvas::flush_before_saves() {
int i;
for (i = fRecs.count() - 1; i >= 0; --i) {
if (kSave_Type != fRecs[i].fType) {
break;
}
}
this->flush_le(i);
}
enum Flags {
kNoTranslate_Flag = 1 << 0,
kNoClip_Flag = 1 << 1,
kNoCull_Flag = 1 << 2,
kNoScale_Flag = 1 << 3,
};
void SkDeferredCanvas::flush_check(SkRect* bounds, const SkPaint* paint, unsigned flags) {
if (paint) {
if (paint->getShader() || paint->getImageFilter()) {
flags |= kNoTranslate_Flag | kNoScale_Flag;
}
// TODO: replace these with code to enlarge the bounds conservatively?
if (paint->getStyle() != SkPaint::kFill_Style || paint->getMaskFilter() ||
paint->getImageFilter() || paint->getPathEffect())
{
flags |= kNoCull_Flag | kNoScale_Flag | kNoClip_Flag;
}
if (paint->getLooper()) {
// to be conservative, we disable both, since embedded layers could have shaders
// or strokes etc.
flags |= kNoTranslate_Flag | kNoCull_Flag | kNoScale_Flag;
}
}
bool canClip = !(flags & kNoClip_Flag);
bool canTranslate = !(flags & kNoTranslate_Flag);
bool canCull = !(flags & kNoCull_Flag);
bool canScale = !(flags & kNoScale_Flag);
int i;
for (i = fRecs.count() - 1; i >= 0; --i) {
const Rec& rec = fRecs[i];
switch (rec.fType) {
case kSave_Type:
// continue to the next rec
break;
case kClipRect_Type:
if (!canCull) {
goto STOP;
}
if (canClip) {
if (!bounds->intersect(rec.fData.fBounds)) {
bounds->setEmpty();
return;
}
// continue to the next rec
} else {
if (!rec.fData.fBounds.contains(*bounds)) {
goto STOP;
}
// continue to the next rec
}
break;
case kTrans_Type:
if (canTranslate) {
bounds->offset(rec.fData.fTranslate.x(), rec.fData.fTranslate.y());
// continue to the next rec
} else {
goto STOP;
}
break;
case kScaleTrans_Type:
if (canScale) {
SkMatrix m;
rec.getConcat(&m);
m.mapRectScaleTranslate(bounds, *bounds);
} else {
goto STOP;
}
break;
}
}
STOP:
this->flush_le(i);
}
void SkDeferredCanvas::flush_translate(SkScalar* x, SkScalar* y, const SkRect& bounds,
const SkPaint* paint) {
SkRect tmp = bounds;
this->flush_check(&tmp, paint, kNoClip_Flag | kNoScale_Flag);
*x += tmp.x() - bounds.x();
*y += tmp.y() - bounds.y();
}
void SkDeferredCanvas::flush_translate(SkScalar* x, SkScalar* y, const SkPaint& paint) {
SkRect tmp = SkRect::MakeXYWH(*x, *y, 1, 1);
this->flush_check(&tmp, &paint, kNoClip_Flag | kNoCull_Flag | kNoScale_Flag);
*x = tmp.x();
*y = tmp.y();
}
///////////////////////////////////////////////////////////////////////////////////////////////////
void SkDeferredCanvas::willSave() {
this->push_save();
}
SkCanvas::SaveLayerStrategy SkDeferredCanvas::getSaveLayerStrategy(const SaveLayerRec& rec) {
this->flush_all();
fCanvas->saveLayer(rec);
this->INHERITED::getSaveLayerStrategy(rec);
// No need for a layer.
return kNoLayer_SaveLayerStrategy;
}
void SkDeferredCanvas::willRestore() {
for (int i = fRecs.count() - 1; i >= 0; --i) {
if (kSave_Type == fRecs[i].fType) {
fRecs.setCount(i); // pop off everything here and later
return;
}
}
for (int i = 0; i < fRecs.count(); ++i) {
SkASSERT(kSave_Type != fRecs[i].fType);
}
fRecs.setCount(0);
fCanvas->restore();
this->INHERITED::willRestore();
}
void SkDeferredCanvas::didConcat(const SkMatrix& matrix) {
if (matrix.isIdentity()) {
return;
}
if (!this->push_concat(matrix)) {
this->flush_all();
fCanvas->concat(matrix);
this->INHERITED::didConcat(matrix);
}
}
void SkDeferredCanvas::didSetMatrix(const SkMatrix& matrix) {
this->flush_all();
fCanvas->setMatrix(matrix);
this->INHERITED::didSetMatrix(matrix);
}
void SkDeferredCanvas::onClipRect(const SkRect& rect, SkClipOp op, ClipEdgeStyle edgeStyle) {
if (kIntersect_SkClipOp == op) {
this->push_cliprect(rect);
} else {
this->flush_all();
fCanvas->clipRect(rect, op, kSoft_ClipEdgeStyle == edgeStyle);
this->INHERITED::onClipRect(rect, op, edgeStyle);
}
}
void SkDeferredCanvas::onClipRRect(const SkRRect& rrect, SkClipOp op, ClipEdgeStyle edgeStyle) {
this->flush_all();
fCanvas->clipRRect(rrect, op, kSoft_ClipEdgeStyle == edgeStyle);
this->INHERITED::onClipRRect(rrect, op, edgeStyle);
}
void SkDeferredCanvas::onClipPath(const SkPath& path, SkClipOp op, ClipEdgeStyle edgeStyle) {
this->flush_all();
fCanvas->clipPath(path, op, kSoft_ClipEdgeStyle == edgeStyle);
this->INHERITED::onClipPath(path, op, edgeStyle);
}
void SkDeferredCanvas::onClipRegion(const SkRegion& deviceRgn, SkClipOp op) {
this->flush_all();
fCanvas->clipRegion(deviceRgn, op);
this->INHERITED::onClipRegion(deviceRgn, op);
}
void SkDeferredCanvas::onDrawPaint(const SkPaint& paint) {
// TODO: Can we turn this into drawRect?
this->flush_all();
fCanvas->drawPaint(paint);
}
void SkDeferredCanvas::onDrawPoints(PointMode mode, size_t count, const SkPoint pts[],
const SkPaint& paint) {
this->flush_all();
fCanvas->drawPoints(mode, count, pts, paint);
}
void SkDeferredCanvas::onDrawRect(const SkRect& rect, const SkPaint& paint) {
SkRect modRect = rect;
this->flush_check(&modRect, &paint);
fCanvas->drawRect(modRect, paint);
}
void SkDeferredCanvas::onDrawRegion(const SkRegion& region, const SkPaint& paint) {
this->flush_all(); // can we do better?
fCanvas->drawRegion(region, paint);
}
void SkDeferredCanvas::onDrawOval(const SkRect& rect, const SkPaint& paint) {
SkRect modRect = rect;
this->flush_check(&modRect, &paint, kNoClip_Flag);
fCanvas->drawOval(modRect, paint);
}
void SkDeferredCanvas::onDrawArc(const SkRect& rect, SkScalar startAngle, SkScalar sweepAngle,
bool useCenter, const SkPaint& paint) {
SkRect modRect = rect;
this->flush_check(&modRect, &paint, kNoClip_Flag);
fCanvas->drawArc(modRect, startAngle, sweepAngle, useCenter, paint);
}
static SkRRect make_offset(const SkRRect& src, SkScalar dx, SkScalar dy) {
SkRRect dst = src;
dst.offset(dx, dy);
return dst;
}
void SkDeferredCanvas::onDrawRRect(const SkRRect& rrect, const SkPaint& paint) {
SkRect modRect = rrect.getBounds();
this->flush_check(&modRect, &paint, kNoClip_Flag);
fCanvas->drawRRect(make_offset(rrect,
modRect.x() - rrect.getBounds().x(),
modRect.y() - rrect.getBounds().y()), paint);
}
void SkDeferredCanvas::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) {
this->flush_all();
fCanvas->drawDRRect(outer, inner, paint);
}
void SkDeferredCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
if (path.isInverseFillType()) {
this->flush_before_saves();
} else {
SkRect modRect = path.getBounds();
this->flush_check(&modRect, &paint, kNoClip_Flag | kNoTranslate_Flag | kNoScale_Flag);
}
fCanvas->drawPath(path, paint);
}
void SkDeferredCanvas::onDrawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y,
const SkPaint* paint) {
const SkScalar w = SkIntToScalar(bitmap.width());
const SkScalar h = SkIntToScalar(bitmap.height());
SkRect bounds = SkRect::MakeXYWH(x, y, w, h);
this->flush_check(&bounds, paint, kNoClip_Flag);
if (bounds.width() == w && bounds.height() == h) {
fCanvas->drawBitmap(bitmap, bounds.x(), bounds.y(), paint);
} else {
fCanvas->drawBitmapRect(bitmap, bounds, paint);
}
}
void SkDeferredCanvas::onDrawBitmapRect(const SkBitmap& bitmap, const SkRect* src, const SkRect& dst,
const SkPaint* paint, SrcRectConstraint constraint) {
SkRect modRect = dst;
this->flush_check(&modRect, paint, kNoClip_Flag);
fCanvas->legacy_drawBitmapRect(bitmap, src, modRect, paint, constraint);
}
void SkDeferredCanvas::onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint* paint) {
SkRect modRect = dst;
this->flush_check(&modRect, paint, kNoClip_Flag);
fCanvas->drawBitmapNine(bitmap, center, modRect, paint);
}
void SkDeferredCanvas::onDrawBitmapLattice(const SkBitmap& bitmap, const Lattice& lattice,
const SkRect& dst, const SkPaint* paint) {
SkRect modRect = dst;
this->flush_check(&modRect, paint, kNoClip_Flag);
fCanvas->drawBitmapLattice(bitmap, lattice, modRect, paint);
}
void SkDeferredCanvas::onDrawImageNine(const SkImage* image, const SkIRect& center,
const SkRect& dst, const SkPaint* paint) {
SkRect modRect = dst;
this->flush_check(&modRect, paint, kNoClip_Flag);
fCanvas->drawImageNine(image, center, modRect, paint);
}
void SkDeferredCanvas::onDrawImage(const SkImage* image, SkScalar x, SkScalar y,
const SkPaint* paint) {
const SkScalar w = SkIntToScalar(image->width());
const SkScalar h = SkIntToScalar(image->height());
SkRect bounds = SkRect::MakeXYWH(x, y, w, h);
this->flush_check(&bounds, paint, kNoClip_Flag);
if (bounds.width() == w && bounds.height() == h) {
fCanvas->drawImage(image, bounds.x(), bounds.y(), paint);
} else {
fCanvas->drawImageRect(image, bounds, paint);
}
}
void SkDeferredCanvas::onDrawImageRect(const SkImage* image, const SkRect* src, const SkRect& dst,
const SkPaint* paint, SrcRectConstraint constraint) {
SkRect modRect = dst;
this->flush_check(&modRect, paint, kNoClip_Flag);
fCanvas->legacy_drawImageRect(image, src, modRect, paint, constraint);
}
void SkDeferredCanvas::onDrawImageLattice(const SkImage* image, const Lattice& lattice,
const SkRect& dst, const SkPaint* paint) {
SkRect modRect = dst;
this->flush_check(&modRect, paint, kNoClip_Flag);
fCanvas->drawImageLattice(image, lattice, modRect, paint);
}
void SkDeferredCanvas::onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
const SkPaint& paint) {
this->flush_translate(&x, &y, paint);
fCanvas->drawText(text, byteLength, x, y, paint);
}
void SkDeferredCanvas::onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
const SkPaint& paint) {
this->flush_before_saves();
fCanvas->drawPosText(text, byteLength, pos, paint);
}
void SkDeferredCanvas::onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
SkScalar constY, const SkPaint& paint) {
this->flush_before_saves();
fCanvas->drawPosTextH(text, byteLength, xpos, constY, paint);
}
void SkDeferredCanvas::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
const SkMatrix* matrix, const SkPaint& paint) {
this->flush_before_saves();
fCanvas->drawTextOnPath(text, byteLength, path, matrix, paint);
}
void SkDeferredCanvas::onDrawTextRSXform(const void* text, size_t byteLength,
const SkRSXform xform[], const SkRect* cullRect,
const SkPaint& paint) {
if (cullRect) {
SkRect modRect = *cullRect;
// only allow culling
this->flush_check(&modRect, &paint, kNoClip_Flag | kNoScale_Flag | kNoTranslate_Flag);
} else {
this->flush_before_saves();
}
fCanvas->drawTextRSXform(text, byteLength, xform, cullRect, paint);
}
void SkDeferredCanvas::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y,
const SkPaint &paint) {
this->flush_translate(&x, &y, blob->bounds(), &paint);
fCanvas->drawTextBlob(blob, x, y, paint);
}
#include "SkPicture.h"
#include "SkCanvasPriv.h"
void SkDeferredCanvas::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix,
const SkPaint* paint) {
if (kEager == fEvalType) {
SkAutoCanvasMatrixPaint acmp(this, matrix, paint, picture->cullRect());
picture->playback(this);
} else {
this->flush_before_saves();
fCanvas->drawPicture(picture, matrix, paint);
}
}
void SkDeferredCanvas::onDrawDrawable(SkDrawable* drawable, const SkMatrix* matrix) {
if (kEager == fEvalType) {
// TODO: investigate culling and applying concat to the matrix
drawable->draw(this, matrix);
} else {
this->flush_before_saves();
fCanvas->drawDrawable(drawable, matrix);
}
}
void SkDeferredCanvas::onDrawAtlas(const SkImage* image, const SkRSXform xform[],
const SkRect rects[], const SkColor colors[],
int count, SkBlendMode bmode,
const SkRect* cull, const SkPaint* paint) {
this->flush_before_saves();
fCanvas->drawAtlas(image, xform, rects, colors, count, bmode, cull, paint);
}
void SkDeferredCanvas::onDrawVerticesObject(const SkVertices* vertices, SkBlendMode bmode,
const SkPaint& paint) {
this->flush_before_saves();
fCanvas->drawVertices(vertices, bmode, paint);
}
void SkDeferredCanvas::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkBlendMode bmode,
const SkPaint& paint) {
this->flush_before_saves();
fCanvas->drawPatch(cubics, colors, texCoords, bmode, paint);
}
void SkDeferredCanvas::onDrawAnnotation(const SkRect& rect, const char key[], SkData* data) {
SkRect modRect = rect;
this->flush_check(&modRect, nullptr, kNoClip_Flag);
fCanvas->drawAnnotation(modRect, key, data);
}
#ifdef SK_SUPPORT_LEGACY_DRAWFILTER
SkDrawFilter* SkDeferredCanvas::setDrawFilter(SkDrawFilter* filter) {
fCanvas->setDrawFilter(filter);
return this->INHERITED::setDrawFilter(filter);
}
#endif
///////////////////////////////////////////////////////////////////////////////////////////////////
sk_sp<SkSurface> SkDeferredCanvas::onNewSurface(const SkImageInfo& info,
const SkSurfaceProps& props) {
return fCanvas->makeSurface(info, &props);
}
SkISize SkDeferredCanvas::getBaseLayerSize() const { return fCanvas->getBaseLayerSize(); }
SkRect SkDeferredCanvas::onGetLocalClipBounds() const {
return fCanvas->getLocalClipBounds();
}
SkIRect SkDeferredCanvas::onGetDeviceClipBounds() const {
return fCanvas->getDeviceClipBounds();
}
bool SkDeferredCanvas::isClipEmpty() const { return fCanvas->isClipEmpty(); }
bool SkDeferredCanvas::isClipRect() const { return fCanvas->isClipRect(); }
bool SkDeferredCanvas::onPeekPixels(SkPixmap* pixmap) { return fCanvas->peekPixels(pixmap); }
bool SkDeferredCanvas::onAccessTopLayerPixels(SkPixmap* pixmap) {
SkImageInfo info;
size_t rowBytes;
SkIPoint* origin = nullptr;
void* addr = fCanvas->accessTopLayerPixels(&info, &rowBytes, origin);
if (addr) {
*pixmap = SkPixmap(info, addr, rowBytes);
return true;
}
return false;
}
SkImageInfo SkDeferredCanvas::onImageInfo() const { return fCanvas->imageInfo(); }
bool SkDeferredCanvas::onGetProps(SkSurfaceProps* props) const { return fCanvas->getProps(props); }
void SkDeferredCanvas::onFlush() {
this->flush_all();
return fCanvas->flush();
}