/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkLayerInfo.h"
#include "SkRecordDraw.h"
#include "SkPatchUtils.h"
void SkRecordDraw(const SkRecord& record,
SkCanvas* canvas,
SkPicture const* const drawablePicts[],
SkDrawable* const drawables[],
int drawableCount,
const SkBBoxHierarchy* bbh,
SkPicture::AbortCallback* callback) {
SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/);
if (bbh) {
// Draw only ops that affect pixels in the canvas's current clip.
// The SkRecord and BBH were recorded in identity space. This canvas
// is not necessarily in that same space. getClipBounds() returns us
// this canvas' clip bounds transformed back into identity space, which
// lets us query the BBH.
SkRect query;
if (!canvas->getClipBounds(&query)) {
query.setEmpty();
}
SkTDArray<unsigned> ops;
bbh->search(query, &ops);
SkRecords::Draw draw(canvas, drawablePicts, drawables, drawableCount);
for (int i = 0; i < ops.count(); i++) {
if (callback && callback->abort()) {
return;
}
// This visit call uses the SkRecords::Draw::operator() to call
// methods on the |canvas|, wrapped by methods defined with the
// DRAW() macro.
record.visit<void>(ops[i], draw);
}
} else {
// Draw all ops.
SkRecords::Draw draw(canvas, drawablePicts, drawables, drawableCount);
for (unsigned i = 0; i < record.count(); i++) {
if (callback && callback->abort()) {
return;
}
// This visit call uses the SkRecords::Draw::operator() to call
// methods on the |canvas|, wrapped by methods defined with the
// DRAW() macro.
record.visit<void>(i, draw);
}
}
}
void SkRecordPartialDraw(const SkRecord& record, SkCanvas* canvas,
SkPicture const* const drawablePicts[], int drawableCount,
unsigned start, unsigned stop,
const SkMatrix& initialCTM) {
SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/);
stop = SkTMin(stop, record.count());
SkRecords::Draw draw(canvas, drawablePicts, NULL, drawableCount, &initialCTM);
for (unsigned i = start; i < stop; i++) {
record.visit<void>(i, draw);
}
}
namespace SkRecords {
// NoOps draw nothing.
template <> void Draw::draw(const NoOp&) {}
#define DRAW(T, call) template <> void Draw::draw(const T& r) { fCanvas->call; }
DRAW(Restore, restore());
DRAW(Save, save());
DRAW(SaveLayer, saveLayer(r.bounds, r.paint, r.flags));
DRAW(SetMatrix, setMatrix(SkMatrix::Concat(fInitialCTM, r.matrix)));
DRAW(ClipPath, clipPath(r.path, r.opAA.op, r.opAA.aa));
DRAW(ClipRRect, clipRRect(r.rrect, r.opAA.op, r.opAA.aa));
DRAW(ClipRect, clipRect(r.rect, r.opAA.op, r.opAA.aa));
DRAW(ClipRegion, clipRegion(r.region, r.op));
DRAW(BeginCommentGroup, beginCommentGroup(r.description));
DRAW(AddComment, addComment(r.key, r.value));
DRAW(EndCommentGroup, endCommentGroup());
DRAW(DrawBitmap, drawBitmap(r.bitmap.shallowCopy(), r.left, r.top, r.paint));
DRAW(DrawBitmapNine, drawBitmapNine(r.bitmap.shallowCopy(), r.center, r.dst, r.paint));
DRAW(DrawBitmapRectToRect,
drawBitmapRectToRect(r.bitmap.shallowCopy(), r.src, r.dst, r.paint,
SkCanvas::kNone_DrawBitmapRectFlag));
DRAW(DrawBitmapRectToRectBleed,
drawBitmapRectToRect(r.bitmap.shallowCopy(), r.src, r.dst, r.paint,
SkCanvas::kBleed_DrawBitmapRectFlag));
DRAW(DrawDRRect, drawDRRect(r.outer, r.inner, r.paint));
DRAW(DrawImage, drawImage(r.image, r.left, r.top, r.paint));
DRAW(DrawImageRect, drawImageRect(r.image, r.src, r.dst, r.paint));
DRAW(DrawOval, drawOval(r.oval, r.paint));
DRAW(DrawPaint, drawPaint(r.paint));
DRAW(DrawPath, drawPath(r.path, r.paint));
DRAW(DrawPatch, drawPatch(r.cubics, r.colors, r.texCoords, r.xmode, r.paint));
DRAW(DrawPicture, drawPicture(r.picture, &r.matrix, r.paint));
DRAW(DrawPoints, drawPoints(r.mode, r.count, r.pts, r.paint));
DRAW(DrawPosText, drawPosText(r.text, r.byteLength, r.pos, r.paint));
DRAW(DrawPosTextH, drawPosTextH(r.text, r.byteLength, r.xpos, r.y, r.paint));
DRAW(DrawRRect, drawRRect(r.rrect, r.paint));
DRAW(DrawRect, drawRect(r.rect, r.paint));
DRAW(DrawSprite, drawSprite(r.bitmap.shallowCopy(), r.left, r.top, r.paint));
DRAW(DrawText, drawText(r.text, r.byteLength, r.x, r.y, r.paint));
DRAW(DrawTextBlob, drawTextBlob(r.blob, r.x, r.y, r.paint));
DRAW(DrawTextOnPath, drawTextOnPath(r.text, r.byteLength, r.path, &r.matrix, r.paint));
DRAW(DrawVertices, drawVertices(r.vmode, r.vertexCount, r.vertices, r.texs, r.colors,
r.xmode.get(), r.indices, r.indexCount, r.paint));
#undef DRAW
template <> void Draw::draw(const DrawDrawable& r) {
SkASSERT(r.index >= 0);
SkASSERT(r.index < fDrawableCount);
if (fDrawables) {
SkASSERT(NULL == fDrawablePicts);
fCanvas->drawDrawable(fDrawables[r.index]);
} else {
fCanvas->drawPicture(fDrawablePicts[r.index]);
}
}
// This is an SkRecord visitor that fills an SkBBoxHierarchy.
//
// The interesting part here is how to calculate bounds for ops which don't
// have intrinsic bounds. What is the bounds of a Save or a Translate?
//
// We answer this by thinking about a particular definition of bounds: if I
// don't execute this op, pixels in this rectangle might draw incorrectly. So
// the bounds of a Save, a Translate, a Restore, etc. are the union of the
// bounds of Draw* ops that they might have an effect on. For any given
// Save/Restore block, the bounds of the Save, the Restore, and any other
// non-drawing ("control") ops inside are exactly the union of the bounds of
// the drawing ops inside that block.
//
// To implement this, we keep a stack of active Save blocks. As we consume ops
// inside the Save/Restore block, drawing ops are unioned with the bounds of
// the block, and control ops are stashed away for later. When we finish the
// block with a Restore, our bounds are complete, and we go back and fill them
// in for all the control ops we stashed away.
class FillBounds : SkNoncopyable {
public:
FillBounds(const SkRect& cullRect, const SkRecord& record)
: fNumRecords(record.count())
, fCullRect(cullRect)
, fBounds(record.count())
{
// Calculate bounds for all ops. This won't go quite in order, so we'll need
// to store the bounds separately then feed them in to the BBH later in order.
fCTM = &SkMatrix::I();
fCurrentClipBounds = fCullRect;
}
void setCurrentOp(unsigned currentOp) { fCurrentOp = currentOp; }
void cleanUp(SkBBoxHierarchy* bbh) {
// If we have any lingering unpaired Saves, simulate restores to make
// sure all ops in those Save blocks have their bounds calculated.
while (!fSaveStack.isEmpty()) {
this->popSaveBlock();
}
// Any control ops not part of any Save/Restore block draw everywhere.
while (!fControlIndices.isEmpty()) {
this->popControl(fCullRect);
}
// Finally feed all stored bounds into the BBH. They'll be returned in this order.
if (bbh) {
bbh->insert(fBounds.get(), fNumRecords);
}
}
template <typename T> void operator()(const T& op) {
this->updateCTM(op);
this->updateClipBounds(op);
this->trackBounds(op);
}
// In this file, SkRect are in local coordinates, Bounds are translated back to identity space.
typedef SkRect Bounds;
unsigned currentOp() const { return fCurrentOp; }
const SkMatrix& ctm() const { return *fCTM; }
const Bounds& getBounds(unsigned index) const { return fBounds[index]; }
// Adjust rect for all paints that may affect its geometry, then map it to identity space.
Bounds adjustAndMap(SkRect rect, const SkPaint* paint) const {
// Inverted rectangles really confuse our BBHs.
rect.sort();
// Adjust the rect for its own paint.
if (!AdjustForPaint(paint, &rect)) {
// The paint could do anything to our bounds. The only safe answer is the current clip.
return fCurrentClipBounds;
}
// Adjust rect for all the paints from the SaveLayers we're inside.
if (!this->adjustForSaveLayerPaints(&rect)) {
// Same deal as above.
return fCurrentClipBounds;
}
// Map the rect back to identity space.
fCTM->mapRect(&rect);
// Nothing can draw outside the current clip.
if (!rect.intersect(fCurrentClipBounds)) {
return Bounds::MakeEmpty();
}
return rect;
}
private:
struct SaveBounds {
int controlOps; // Number of control ops in this Save block, including the Save.
Bounds bounds; // Bounds of everything in the block.
const SkPaint* paint; // Unowned. If set, adjusts the bounds of all ops in this block.
};
// Only Restore and SetMatrix change the CTM.
template <typename T> void updateCTM(const T&) {}
void updateCTM(const Restore& op) { fCTM = &op.matrix; }
void updateCTM(const SetMatrix& op) { fCTM = &op.matrix; }
// Most ops don't change the clip.
template <typename T> void updateClipBounds(const T&) {}
// Clip{Path,RRect,Rect,Region} obviously change the clip. They all know their bounds already.
void updateClipBounds(const ClipPath& op) { this->updateClipBoundsForClipOp(op.devBounds); }
void updateClipBounds(const ClipRRect& op) { this->updateClipBoundsForClipOp(op.devBounds); }
void updateClipBounds(const ClipRect& op) { this->updateClipBoundsForClipOp(op.devBounds); }
void updateClipBounds(const ClipRegion& op) { this->updateClipBoundsForClipOp(op.devBounds); }
// The bounds of clip ops need to be adjusted for the paints of saveLayers they're inside.
void updateClipBoundsForClipOp(const SkIRect& devBounds) {
Bounds clip = SkRect::Make(devBounds);
// We don't call adjustAndMap() because as its last step it would intersect the adjusted
// clip bounds with the previous clip, exactly what we can't do when the clip grows.
if (this->adjustForSaveLayerPaints(&clip)) {
fCurrentClipBounds = clip.intersect(fCullRect) ? clip : Bounds::MakeEmpty();
} else {
fCurrentClipBounds = fCullRect;
}
}
// Restore holds the devBounds for the clip after the {save,saveLayer}/restore block completes.
void updateClipBounds(const Restore& op) {
// This is just like the clip ops above, but we need to skip the effects (if any) of our
// paired saveLayer (if it is one); it has not yet been popped off the save stack. Our
// devBounds reflect the state of the world after the saveLayer/restore block is done,
// so they are not affected by the saveLayer's paint.
const int kSavesToIgnore = 1;
Bounds clip = SkRect::Make(op.devBounds);
if (this->adjustForSaveLayerPaints(&clip, kSavesToIgnore)) {
fCurrentClipBounds = clip.intersect(fCullRect) ? clip : Bounds::MakeEmpty();
} else {
fCurrentClipBounds = fCullRect;
}
}
// We also take advantage of SaveLayer bounds when present to further cut the clip down.
void updateClipBounds(const SaveLayer& op) {
if (op.bounds) {
// adjustAndMap() intersects these layer bounds with the previous clip for us.
fCurrentClipBounds = this->adjustAndMap(*op.bounds, op.paint);
}
}
// The bounds of these ops must be calculated when we hit the Restore
// from the bounds of the ops in the same Save block.
void trackBounds(const Save&) { this->pushSaveBlock(NULL); }
void trackBounds(const SaveLayer& op) { this->pushSaveBlock(op.paint); }
void trackBounds(const Restore&) { fBounds[fCurrentOp] = this->popSaveBlock(); }
void trackBounds(const SetMatrix&) { this->pushControl(); }
void trackBounds(const ClipRect&) { this->pushControl(); }
void trackBounds(const ClipRRect&) { this->pushControl(); }
void trackBounds(const ClipPath&) { this->pushControl(); }
void trackBounds(const ClipRegion&) { this->pushControl(); }
void trackBounds(const BeginCommentGroup&) { this->pushControl(); }
void trackBounds(const AddComment&) { this->pushControl(); }
void trackBounds(const EndCommentGroup&) { this->pushControl(); }
// For all other ops, we can calculate and store the bounds directly now.
template <typename T> void trackBounds(const T& op) {
fBounds[fCurrentOp] = this->bounds(op);
this->updateSaveBounds(fBounds[fCurrentOp]);
}
void pushSaveBlock(const SkPaint* paint) {
// Starting a new Save block. Push a new entry to represent that.
SaveBounds sb;
sb.controlOps = 0;
// If the paint affects transparent black, the bound shouldn't be smaller
// than the current clip bounds.
sb.bounds =
PaintMayAffectTransparentBlack(paint) ? fCurrentClipBounds : Bounds::MakeEmpty();
sb.paint = paint;
fSaveStack.push(sb);
this->pushControl();
}
static bool PaintMayAffectTransparentBlack(const SkPaint* paint) {
if (paint) {
// FIXME: this is very conservative
if (paint->getImageFilter() || paint->getColorFilter()) {
return true;
}
// Unusual Xfermodes require us to process a saved layer
// even with operations outisde the clip.
// For example, DstIn is used by masking layers.
// https://code.google.com/p/skia/issues/detail?id=1291
// https://crbug.com/401593
SkXfermode* xfermode = paint->getXfermode();
SkXfermode::Mode mode;
// SrcOver is ok, and is also the common case with a NULL xfermode.
// So we should make that the fast path and bypass the mode extraction
// and test.
if (xfermode && xfermode->asMode(&mode)) {
switch (mode) {
// For each of the following transfer modes, if the source
// alpha is zero (our transparent black), the resulting
// blended alpha is not necessarily equal to the original
// destination alpha.
case SkXfermode::kClear_Mode:
case SkXfermode::kSrc_Mode:
case SkXfermode::kSrcIn_Mode:
case SkXfermode::kDstIn_Mode:
case SkXfermode::kSrcOut_Mode:
case SkXfermode::kDstATop_Mode:
case SkXfermode::kModulate_Mode:
return true;
break;
default:
break;
}
}
}
return false;
}
Bounds popSaveBlock() {
// We're done the Save block. Apply the block's bounds to all control ops inside it.
SaveBounds sb;
fSaveStack.pop(&sb);
while (sb.controlOps --> 0) {
this->popControl(sb.bounds);
}
// This whole Save block may be part another Save block.
this->updateSaveBounds(sb.bounds);
// If called from a real Restore (not a phony one for balance), it'll need the bounds.
return sb.bounds;
}
void pushControl() {
fControlIndices.push(fCurrentOp);
if (!fSaveStack.isEmpty()) {
fSaveStack.top().controlOps++;
}
}
void popControl(const Bounds& bounds) {
fBounds[fControlIndices.top()] = bounds;
fControlIndices.pop();
}
void updateSaveBounds(const Bounds& bounds) {
// If we're in a Save block, expand its bounds to cover these bounds too.
if (!fSaveStack.isEmpty()) {
fSaveStack.top().bounds.join(bounds);
}
}
// FIXME: this method could use better bounds
Bounds bounds(const DrawText&) const { return fCurrentClipBounds; }
Bounds bounds(const DrawPaint&) const { return fCurrentClipBounds; }
Bounds bounds(const NoOp&) const { return Bounds::MakeEmpty(); } // NoOps don't draw.
Bounds bounds(const DrawSprite& op) const { // Ignores the matrix, but respects the clip.
SkRect rect = Bounds::MakeXYWH(op.left, op.top, op.bitmap.width(), op.bitmap.height());
if (!rect.intersect(fCurrentClipBounds)) {
return Bounds::MakeEmpty();
}
return rect;
}
Bounds bounds(const DrawRect& op) const { return this->adjustAndMap(op.rect, &op.paint); }
Bounds bounds(const DrawOval& op) const { return this->adjustAndMap(op.oval, &op.paint); }
Bounds bounds(const DrawRRect& op) const {
return this->adjustAndMap(op.rrect.rect(), &op.paint);
}
Bounds bounds(const DrawDRRect& op) const {
return this->adjustAndMap(op.outer.rect(), &op.paint);
}
Bounds bounds(const DrawImage& op) const {
const SkImage* image = op.image;
SkRect rect = SkRect::MakeXYWH(op.left, op.top, image->width(), image->height());
return this->adjustAndMap(rect, op.paint);
}
Bounds bounds(const DrawImageRect& op) const {
return this->adjustAndMap(op.dst, op.paint);
}
Bounds bounds(const DrawBitmapRectToRect& op) const {
return this->adjustAndMap(op.dst, op.paint);
}
Bounds bounds(const DrawBitmapRectToRectBleed& op) const {
return this->adjustAndMap(op.dst, op.paint);
}
Bounds bounds(const DrawBitmapNine& op) const {
return this->adjustAndMap(op.dst, op.paint);
}
Bounds bounds(const DrawBitmap& op) const {
return this->adjustAndMap(
SkRect::MakeXYWH(op.left, op.top, op.bitmap.width(), op.bitmap.height()),
op.paint);
}
Bounds bounds(const DrawPath& op) const {
return op.path.isInverseFillType() ? fCurrentClipBounds
: this->adjustAndMap(op.path.getBounds(), &op.paint);
}
Bounds bounds(const DrawPoints& op) const {
SkRect dst;
dst.set(op.pts, op.count);
// Pad the bounding box a little to make sure hairline points' bounds aren't empty.
SkScalar stroke = SkMaxScalar(op.paint.getStrokeWidth(), 0.01f);
dst.outset(stroke/2, stroke/2);
return this->adjustAndMap(dst, &op.paint);
}
Bounds bounds(const DrawPatch& op) const {
SkRect dst;
dst.set(op.cubics, SkPatchUtils::kNumCtrlPts);
return this->adjustAndMap(dst, &op.paint);
}
Bounds bounds(const DrawVertices& op) const {
SkRect dst;
dst.set(op.vertices, op.vertexCount);
return this->adjustAndMap(dst, &op.paint);
}
Bounds bounds(const DrawPicture& op) const {
SkRect dst = op.picture->cullRect();
op.matrix.mapRect(&dst);
return this->adjustAndMap(dst, op.paint);
}
Bounds bounds(const DrawPosText& op) const {
const int N = op.paint.countText(op.text, op.byteLength);
if (N == 0) {
return Bounds::MakeEmpty();
}
SkRect dst;
dst.set(op.pos, N);
AdjustTextForFontMetrics(&dst, op.paint);
return this->adjustAndMap(dst, &op.paint);
}
Bounds bounds(const DrawPosTextH& op) const {
const int N = op.paint.countText(op.text, op.byteLength);
if (N == 0) {
return Bounds::MakeEmpty();
}
SkScalar left = op.xpos[0], right = op.xpos[0];
for (int i = 1; i < N; i++) {
left = SkMinScalar(left, op.xpos[i]);
right = SkMaxScalar(right, op.xpos[i]);
}
SkRect dst = { left, op.y, right, op.y };
AdjustTextForFontMetrics(&dst, op.paint);
return this->adjustAndMap(dst, &op.paint);
}
Bounds bounds(const DrawTextOnPath& op) const {
SkRect dst = op.path.getBounds();
// Pad all sides by the maximum padding in any direction we'd normally apply.
SkRect pad = { 0, 0, 0, 0};
AdjustTextForFontMetrics(&pad, op.paint);
// That maximum padding happens to always be the right pad today.
SkASSERT(pad.fLeft == -pad.fRight);
SkASSERT(pad.fTop == -pad.fBottom);
SkASSERT(pad.fRight > pad.fBottom);
dst.outset(pad.fRight, pad.fRight);
return this->adjustAndMap(dst, &op.paint);
}
Bounds bounds(const DrawTextBlob& op) const {
SkRect dst = op.blob->bounds();
dst.offset(op.x, op.y);
return this->adjustAndMap(dst, &op.paint);
}
Bounds bounds(const DrawDrawable& op) const {
return this->adjustAndMap(op.worstCaseBounds, NULL);
}
static void AdjustTextForFontMetrics(SkRect* rect, const SkPaint& paint) {
#ifdef SK_DEBUG
SkRect correct = *rect;
#endif
// crbug.com/373785 ~~> xPad = 4x yPad
// crbug.com/424824 ~~> bump yPad from 2x text size to 2.5x
const SkScalar yPad = 2.5f * paint.getTextSize(),
xPad = 4.0f * yPad;
rect->outset(xPad, yPad);
#ifdef SK_DEBUG
SkPaint::FontMetrics metrics;
paint.getFontMetrics(&metrics);
correct.fLeft += metrics.fXMin;
correct.fTop += metrics.fTop;
correct.fRight += metrics.fXMax;
correct.fBottom += metrics.fBottom;
// See skia:2862 for why we ignore small text sizes.
SkASSERTF(paint.getTextSize() < 0.001f || rect->contains(correct),
"%f %f %f %f vs. %f %f %f %f\n",
-xPad, -yPad, +xPad, +yPad,
metrics.fXMin, metrics.fTop, metrics.fXMax, metrics.fBottom);
#endif
}
// Returns true if rect was meaningfully adjusted for the effects of paint,
// false if the paint could affect the rect in unknown ways.
static bool AdjustForPaint(const SkPaint* paint, SkRect* rect) {
if (paint) {
if (paint->canComputeFastBounds()) {
*rect = paint->computeFastBounds(*rect, rect);
return true;
}
return false;
}
return true;
}
bool adjustForSaveLayerPaints(SkRect* rect, int savesToIgnore = 0) const {
for (int i = fSaveStack.count() - 1 - savesToIgnore; i >= 0; i--) {
if (!AdjustForPaint(fSaveStack[i].paint, rect)) {
return false;
}
}
return true;
}
const unsigned fNumRecords;
// We do not guarantee anything for operations outside of the cull rect
const SkRect fCullRect;
// Conservative identity-space bounds for each op in the SkRecord.
SkAutoTMalloc<Bounds> fBounds;
// We walk fCurrentOp through the SkRecord, as we go using updateCTM()
// and updateClipBounds() to maintain the exact CTM (fCTM) and conservative
// identity-space bounds of the current clip (fCurrentClipBounds).
unsigned fCurrentOp;
const SkMatrix* fCTM;
Bounds fCurrentClipBounds;
// Used to track the bounds of Save/Restore blocks and the control ops inside them.
SkTDArray<SaveBounds> fSaveStack;
SkTDArray<unsigned> fControlIndices;
};
// SkRecord visitor to gather saveLayer/restore information.
class CollectLayers : SkNoncopyable {
public:
CollectLayers(const SkRect& cullRect, const SkRecord& record,
const SkPicture::SnapshotArray* pictList, SkLayerInfo* accelData)
: fSaveLayersInStack(0)
, fAccelData(accelData)
, fPictList(pictList)
, fFillBounds(cullRect, record)
{}
void setCurrentOp(unsigned currentOp) { fFillBounds.setCurrentOp(currentOp); }
void cleanUp(SkBBoxHierarchy* bbh) {
// fFillBounds must perform its cleanUp first so that all the bounding
// boxes associated with unbalanced restores are updated (prior to
// fetching their bound in popSaveLayerInfo).
fFillBounds.cleanUp(bbh);
while (!fSaveLayerStack.isEmpty()) {
this->popSaveLayerInfo();
}
}
template <typename T> void operator()(const T& op) {
fFillBounds(op);
this->trackSaveLayers(op);
}
private:
struct SaveLayerInfo {
SaveLayerInfo() { }
SaveLayerInfo(int opIndex, bool isSaveLayer, const SkRect* bounds, const SkPaint* paint)
: fStartIndex(opIndex)
, fIsSaveLayer(isSaveLayer)
, fHasNestedSaveLayer(false)
, fBounds(bounds ? *bounds : SkRect::MakeEmpty())
, fPaint(paint) {
}
int fStartIndex;
bool fIsSaveLayer;
bool fHasNestedSaveLayer;
SkRect fBounds;
const SkPaint* fPaint;
};
template <typename T> void trackSaveLayers(const T& op) {
/* most ops aren't involved in saveLayers */
}
void trackSaveLayers(const Save& s) { this->pushSaveLayerInfo(false, NULL, NULL); }
void trackSaveLayers(const SaveLayer& sl) { this->pushSaveLayerInfo(true, sl.bounds, sl.paint); }
void trackSaveLayers(const Restore& r) { this->popSaveLayerInfo(); }
void trackSaveLayersForPicture(const SkPicture* picture, const SkPaint* paint) {
// For sub-pictures, we wrap their layer information within the parent
// picture's rendering hierarchy
SkPicture::AccelData::Key key = SkLayerInfo::ComputeKey();
const SkLayerInfo* childData =
static_cast<const SkLayerInfo*>(picture->EXPERIMENTAL_getAccelData(key));
if (!childData) {
// If the child layer hasn't been generated with saveLayer data we
// assume the worst (i.e., that it does contain layers which nest
// inside existing layers). Layers within sub-pictures that don't
// have saveLayer data cannot be hoisted.
// TODO: could the analysis data be use to fine tune this?
this->updateStackForSaveLayer();
return;
}
for (int i = 0; i < childData->numBlocks(); ++i) {
const SkLayerInfo::BlockInfo& src = childData->block(i);
FillBounds::Bounds newBound = fFillBounds.adjustAndMap(src.fBounds, paint);
if (newBound.isEmpty()) {
continue;
}
this->updateStackForSaveLayer();
SkLayerInfo::BlockInfo& dst = fAccelData->addBlock();
// If src.fPicture is NULL the layer is in dp.picture; otherwise
// it belongs to a sub-picture.
dst.fPicture = src.fPicture ? src.fPicture : picture;
dst.fPicture->ref();
dst.fBounds = newBound;
dst.fSrcBounds = src.fSrcBounds;
dst.fLocalMat = src.fLocalMat;
dst.fPreMat = src.fPreMat;
dst.fPreMat.postConcat(fFillBounds.ctm());
if (src.fPaint) {
dst.fPaint = SkNEW_ARGS(SkPaint, (*src.fPaint));
}
dst.fSaveLayerOpID = src.fSaveLayerOpID;
dst.fRestoreOpID = src.fRestoreOpID;
dst.fHasNestedLayers = src.fHasNestedLayers;
dst.fIsNested = fSaveLayersInStack > 0 || src.fIsNested;
// Store 'saveLayer ops from enclosing picture' + drawPict op + 'ops from sub-picture'
dst.fKeySize = fSaveLayerOpStack.count() + src.fKeySize + 1;
dst.fKey = SkNEW_ARRAY(unsigned, dst.fKeySize);
memcpy(dst.fKey, fSaveLayerOpStack.begin(), fSaveLayerOpStack.count() * sizeof(unsigned));
dst.fKey[fSaveLayerOpStack.count()] = fFillBounds.currentOp();
memcpy(&dst.fKey[fSaveLayerOpStack.count()+1], src.fKey, src.fKeySize * sizeof(unsigned));
}
}
void trackSaveLayers(const DrawPicture& dp) {
this->trackSaveLayersForPicture(dp.picture, dp.paint);
}
void trackSaveLayers(const DrawDrawable& dp) {
SkASSERT(fPictList);
SkASSERT(dp.index >= 0 && dp.index < fPictList->count());
const SkPaint* paint = NULL; // drawables don't get a side-car paint
this->trackSaveLayersForPicture(fPictList->begin()[dp.index], paint);
}
// Inform all the saveLayers already on the stack that they now have a
// nested saveLayer inside them
void updateStackForSaveLayer() {
for (int index = fSaveLayerStack.count() - 1; index >= 0; --index) {
if (fSaveLayerStack[index].fHasNestedSaveLayer) {
break;
}
fSaveLayerStack[index].fHasNestedSaveLayer = true;
if (fSaveLayerStack[index].fIsSaveLayer) {
break;
}
}
}
void pushSaveLayerInfo(bool isSaveLayer, const SkRect* bounds, const SkPaint* paint) {
if (isSaveLayer) {
this->updateStackForSaveLayer();
++fSaveLayersInStack;
fSaveLayerOpStack.push(fFillBounds.currentOp());
}
fSaveLayerStack.push(SaveLayerInfo(fFillBounds.currentOp(), isSaveLayer, bounds, paint));
}
void popSaveLayerInfo() {
if (fSaveLayerStack.count() <= 0) {
SkASSERT(false);
return;
}
SkASSERT(fSaveLayersInStack == fSaveLayerOpStack.count());
SaveLayerInfo sli;
fSaveLayerStack.pop(&sli);
if (!sli.fIsSaveLayer) {
return;
}
--fSaveLayersInStack;
SkLayerInfo::BlockInfo& block = fAccelData->addBlock();
SkASSERT(NULL == block.fPicture); // This layer is in the top-most picture
block.fBounds = fFillBounds.getBounds(sli.fStartIndex);
block.fLocalMat = fFillBounds.ctm();
block.fPreMat = SkMatrix::I();
if (sli.fPaint) {
block.fPaint = SkNEW_ARGS(SkPaint, (*sli.fPaint));
}
block.fSrcBounds = sli.fBounds;
block.fSaveLayerOpID = sli.fStartIndex;
block.fRestoreOpID = fFillBounds.currentOp();
block.fHasNestedLayers = sli.fHasNestedSaveLayer;
block.fIsNested = fSaveLayersInStack > 0;
block.fKeySize = fSaveLayerOpStack.count();
block.fKey = SkNEW_ARRAY(unsigned, block.fKeySize);
memcpy(block.fKey, fSaveLayerOpStack.begin(), block.fKeySize * sizeof(unsigned));
fSaveLayerOpStack.pop();
}
// Used to collect saveLayer information for layer hoisting
int fSaveLayersInStack;
SkTDArray<SaveLayerInfo> fSaveLayerStack;
// The op code indices of all the currently active saveLayers
SkTDArray<unsigned> fSaveLayerOpStack;
SkLayerInfo* fAccelData;
const SkPicture::SnapshotArray* fPictList;
SkRecords::FillBounds fFillBounds;
};
} // namespace SkRecords
void SkRecordFillBounds(const SkRect& cullRect, const SkRecord& record, SkBBoxHierarchy* bbh) {
SkRecords::FillBounds visitor(cullRect, record);
for (unsigned curOp = 0; curOp < record.count(); curOp++) {
visitor.setCurrentOp(curOp);
record.visit<void>(curOp, visitor);
}
visitor.cleanUp(bbh);
}
void SkRecordComputeLayers(const SkRect& cullRect, const SkRecord& record,
const SkPicture::SnapshotArray* pictList, SkBBoxHierarchy* bbh,
SkLayerInfo* data) {
SkRecords::CollectLayers visitor(cullRect, record, pictList, data);
for (unsigned curOp = 0; curOp < record.count(); curOp++) {
visitor.setCurrentOp(curOp);
record.visit<void>(curOp, visitor);
}
visitor.cleanUp(bbh);
}