namespace SkRecords {
bool Draw::skip(const PairedPushCull& r) {
if (fCanvas->quickReject(r.base->rect)) {
fIndex += r.skip;
return true;
}
return false;
}
bool Draw::skip(const BoundedDrawPosTextH& r) {
return fCanvas->quickRejectY(r.minY, r.maxY);
}
// 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(r.flags));
DRAW(SaveLayer, saveLayer(r.bounds, r.paint, r.flags));
DRAW(PopCull, popCull());
DRAW(PushCull, pushCull(r.rect));
DRAW(Clear, clear(r.color));
DRAW(Concat, concat(r.matrix));
DRAW(SetMatrix, setMatrix(SkMatrix::Concat(fInitialCTM, r.matrix)));
DRAW(ClipPath, clipPath(r.path, r.op, r.doAA));
DRAW(ClipRRect, clipRRect(r.rrect, r.op, r.doAA));
DRAW(ClipRect, clipRect(r.rect, r.op, r.doAA));
DRAW(ClipRegion, clipRegion(r.region, r.op));
DRAW(DrawBitmap, drawBitmap(r.bitmap, r.left, r.top, r.paint));
DRAW(DrawBitmapMatrix, drawBitmapMatrix(r.bitmap, r.matrix, r.paint));
DRAW(DrawBitmapNine, drawBitmapNine(r.bitmap, r.center, r.dst, r.paint));
DRAW(DrawBitmapRectToRect, drawBitmapRectToRect(r.bitmap, r.src, r.dst, r.paint, r.flags));
DRAW(DrawDRRect, drawDRRect(r.outer, r.inner, r.paint));
DRAW(DrawOval, drawOval(r.oval, r.paint));
DRAW(DrawPaint, drawPaint(r.paint));
DRAW(DrawPath, drawPath(r.path, 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, r.left, r.top, r.paint));
DRAW(DrawText, drawText(r.text, r.byteLength, 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 PairedPushCull& r) { this->draw(*r.base); }
template <> void Draw::draw(const BoundedDrawPosTextH& r) { this->draw(*r.base); }
} // namespace SkRecords
namespace SkRecords {
// FIXME: SkBitmaps are stateful, so we need to copy them to play back in multiple threads.
static SkBitmap shallow_copy(const SkBitmap& bitmap) {
return bitmap;
}
// 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(PopCull, popCull());
DRAW(PushCull, pushCull(r.rect));
DRAW(Clear, clear(r.color));
DRAW(Concat, concat(r.matrix));
DRAW(SetMatrix, setMatrix(SkMatrix::Concat(fInitialCTM, r.matrix)));
DRAW(ClipPath, clipPath(r.path, r.op, r.doAA));
DRAW(ClipRRect, clipRRect(r.rrect, r.op, r.doAA));
DRAW(ClipRect, clipRect(r.rect, r.op, r.doAA));
DRAW(ClipRegion, clipRegion(r.region, r.op));
DRAW(DrawBitmap, drawBitmap(shallow_copy(r.bitmap), r.left, r.top, r.paint));
DRAW(DrawBitmapMatrix, drawBitmapMatrix(shallow_copy(r.bitmap), r.matrix, r.paint));
DRAW(DrawBitmapNine, drawBitmapNine(shallow_copy(r.bitmap), r.center, r.dst, r.paint));
DRAW(DrawBitmapRectToRect,
drawBitmapRectToRect(shallow_copy(r.bitmap), r.src, r.dst, r.paint, r.flags));
DRAW(DrawDRRect, drawDRRect(r.outer, r.inner, 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.get(), 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(shallow_copy(r.bitmap), r.left, r.top, r.paint));
DRAW(DrawText, drawText(r.text, r.byteLength, 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
// 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 SkRecord& record, SkBBoxHierarchy* bbh) : 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.setIdentity();
for (fCurrentOp = 0; fCurrentOp < record.count(); fCurrentOp++) {
record.visit<void>(fCurrentOp, *this);
}
// 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(SkIRect::MakeLargest());
}
// Finally feed all stored bounds into the BBH. They'll be returned in this order.
SkASSERT(NULL != bbh);
for (uintptr_t i = 0; i < record.count(); i++) {
if (!fBounds[i].isEmpty()) {
bbh->insert((void*)i, fBounds[i], true/*ok to defer*/);
}
}
bbh->flushDeferredInserts();
}
template <typename T> void operator()(const T& r) {
this->updateCTM(r);
this->trackBounds(r);
}
private:
struct SaveBounds {
int controlOps; // Number of control ops in this Save block, including the Save.
SkIRect bounds; // Bounds of everything in the block.
};
template <typename T> void updateCTM(const T&) { /* most ops don't change the CTM */ }
void updateCTM(const Restore& r) { fCTM = r.matrix; }
void updateCTM(const SetMatrix& r) { fCTM = r.matrix; }
void updateCTM(const Concat& r) { fCTM.preConcat(r.matrix); }
// 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(); }
// TODO: bounds of SaveLayer may be more complicated?
void trackBounds(const SaveLayer&) { this->pushSaveBlock(); }
void trackBounds(const Restore&) { fBounds[fCurrentOp] = this->popSaveBlock(); }
void trackBounds(const Concat&) { this->pushControl(); }
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(); }
// 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]);
}
// TODO: remove this trivially-safe default when done bounding all ops
template <typename T> SkIRect bounds(const T&) { return SkIRect::MakeLargest(); }
void pushSaveBlock() {
// Starting a new Save block. Push a new entry to represent that.
SaveBounds sb = { 0, SkIRect::MakeEmpty() };
fSaveStack.push(sb);
this->pushControl();
}
SkIRect 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 SkIRect& bounds) {
fBounds[fControlIndices.top()] = bounds;
fControlIndices.pop();
}
void updateSaveBounds(const SkIRect& bounds) {
// If we're in a Save block, expand its bounds to cover these bounds too.
if (!fSaveStack.isEmpty()) {
fSaveStack.top().bounds.join(bounds);
}
}
SkIRect bounds(const NoOp&) { return SkIRect::MakeEmpty(); } // NoOps don't draw anywhere.
SkAutoTMalloc<SkIRect> fBounds; // One for each op in the record.
SkMatrix fCTM;
unsigned fCurrentOp;
SkTDArray<SaveBounds> fSaveStack;
SkTDArray<unsigned> fControlIndices;
};
} // namespace SkRecords
namespace SkRecords {
// FIXME: SkBitmaps are stateful, so we need to copy them to play back in multiple threads.
static SkBitmap shallow_copy(const SkBitmap& bitmap) {
return bitmap;
}
// 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(PopCull, popCull());
DRAW(PushCull, pushCull(r.rect));
DRAW(Clear, clear(r.color));
DRAW(SetMatrix, setMatrix(SkMatrix::Concat(fInitialCTM, r.matrix)));
DRAW(ClipPath, clipPath(r.path, r.op, r.doAA));
DRAW(ClipRRect, clipRRect(r.rrect, r.op, r.doAA));
DRAW(ClipRect, clipRect(r.rect, r.op, r.doAA));
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(shallow_copy(r.bitmap), r.left, r.top, r.paint));
DRAW(DrawBitmapMatrix, drawBitmapMatrix(shallow_copy(r.bitmap), r.matrix, r.paint));
DRAW(DrawBitmapNine, drawBitmapNine(shallow_copy(r.bitmap), r.center, r.dst, r.paint));
DRAW(DrawBitmapRectToRect,
drawBitmapRectToRect(shallow_copy(r.bitmap), r.src, r.dst, r.paint, r.flags));
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(shallow_copy(r.bitmap), 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));
DRAW(DrawData, drawData(r.data, r.length));
#undef DRAW
// 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, SkBBoxHierarchy* bbh)
: 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;
for (fCurrentOp = 0; fCurrentOp < record.count(); fCurrentOp++) {
record.visit<void>(fCurrentOp, *this);
}
// 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.
SkASSERT(bbh);
bbh->insert(&fBounds, record.count());
}
template <typename T> void operator()(const T& op) {
this->updateCTM(op);
this->updateClipBounds(op);
this->trackBounds(op);
}
private:
// In this file, SkRect are in local coordinates, Bounds are translated back to identity space.
typedef SkRect Bounds;
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.
fCurrentClipBounds = this->adjustForSaveLayerPaints(&clip) ? clip : 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);
fCurrentClipBounds =
this->adjustForSaveLayerPaints(&clip, kSavesToIgnore) ? clip : 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 PushCull&) { this->pushControl(); }
void trackBounds(const PopCull&) { this->pushControl(); }
void trackBounds(const BeginCommentGroup&) { this->pushControl(); }
void trackBounds(const AddComment&) { this->pushControl(); }
void trackBounds(const EndCommentGroup&) { this->pushControl(); }
void trackBounds(const DrawData&) { 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 Clear&) const { return fCullRect; } // Ignores the clip.
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 {
const SkBitmap& bm = op.bitmap;
return Bounds::MakeXYWH(op.left, op.top, bm.width(), bm.height()); // Ignores the matrix.
}
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 DrawBitmapNine& op) const {
return this->adjustAndMap(op.dst, op.paint);
}
Bounds bounds(const DrawBitmap& op) const {
const SkBitmap& bm = op.bitmap;
return this->adjustAndMap(SkRect::MakeXYWH(op.left, op.top, bm.width(), bm.height()),
op.paint);
}
Bounds bounds(const DrawBitmapMatrix& op) const {
const SkBitmap& bm = op.bitmap;
SkRect dst = SkRect::MakeWH(bm.width(), bm.height());
op.matrix.mapRect(&dst);
return this->adjustAndMap(dst, 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();
if (op.matrix) {
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);
}
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;
}
// 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.
// (Only bounded ops call into this method, so oddballs like Clear don't matter here.)
rect.intersect(fCurrentClipBounds);
return rect;
}
// 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;
};
} // namespace SkRecords