| /* |
| * 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[], |
| SkCanvasDrawable* const drawables[], |
| int drawableCount, |
| const SkBBoxHierarchy* bbh, |
| SkDrawPictureCallback* 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)) { |
| // We want to make sure our query rectangle is never totally empty. |
| // Clear ignores the clip, so it must draw even if the clip is logically empty. |
| query = SkRect::MakeWH(SK_ScalarNearlyZero, SK_ScalarNearlyZero); |
| } |
| |
| 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->abortDrawing()) { |
| 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->abortDrawing()) { |
| 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(Clear, clear(r.color)); |
| 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)); |
| DRAW(DrawData, drawData(r.data, r.length)); |
| #undef DRAW |
| |
| template <> void Draw::draw(const DrawDrawable& r) { |
| SkASSERT(r.index >= 0); |
| SkASSERT(r.index < fDrawableCount); |
| if (fDrawables) { |
| SkASSERT(NULL == fDrawablePicts); |
| fCanvas->EXPERIMENTAL_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, 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. |
| // (Only bounded ops call into this method, so oddballs like Clear don't matter here.) |
| rect.intersect(fCurrentClipBounds); |
| 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. |
| 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 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 { // Ignores the matrix. |
| return Bounds::MakeXYWH(op.left, op.top, op.bitmap.width(), op.bitmap.height()); |
| } |
| |
| 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 SkPaint* paint) |
| : fStartIndex(opIndex) |
| , fIsSaveLayer(isSaveLayer) |
| , fHasNestedSaveLayer(false) |
| , fPaint(paint) { |
| } |
| |
| int fStartIndex; |
| bool fIsSaveLayer; |
| bool fHasNestedSaveLayer; |
| 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); } |
| void trackSaveLayers(const SaveLayer& sl) { this->pushSaveLayerInfo(true, 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.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 SkPaint* paint) { |
| if (isSaveLayer) { |
| this->updateStackForSaveLayer(); |
| ++fSaveLayersInStack; |
| fSaveLayerOpStack.push(fFillBounds.currentOp()); |
| } |
| |
| fSaveLayerStack.push(SaveLayerInfo(fFillBounds.currentOp(), isSaveLayer, 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.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); |
| } |
| |