| /* |
| * 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 "GrContext.h" |
| #include "GrLayerCache.h" |
| #include "GrRecordReplaceDraw.h" |
| #include "SkBigPicture.h" |
| #include "SkCanvasPriv.h" |
| #include "SkGr.h" |
| #include "SkImage.h" |
| #include "SkRecordDraw.h" |
| #include "SkRecords.h" |
| |
| |
| static inline void draw_replacement_bitmap(GrCachedLayer* layer, SkCanvas* canvas) { |
| |
| // Some image filter can totally filter away a layer (e.g., SkPictureImageFilter's with |
| // no picture). |
| if (!layer->texture()) { |
| return; |
| } |
| |
| SkBitmap bm; |
| GrWrapTextureInBitmap(layer->texture(), |
| !layer->isAtlased() ? layer->rect().width() : layer->texture()->width(), |
| !layer->isAtlased() ? layer->rect().height() : layer->texture()->height(), |
| false, |
| &bm); |
| |
| canvas->save(); |
| canvas->setMatrix(SkMatrix::I()); |
| if (layer->isAtlased()) { |
| const SkRect src = SkRect::Make(layer->rect()); |
| const SkRect dst = SkRect::Make(layer->srcIR()); |
| |
| SkASSERT(layer->offset().isZero()); |
| |
| canvas->drawBitmapRect(bm, src, dst, layer->paint(), SkCanvas::kStrict_SrcRectConstraint); |
| } else { |
| canvas->drawBitmap(bm, |
| SkIntToScalar(layer->srcIR().fLeft + layer->offset().fX), |
| SkIntToScalar(layer->srcIR().fTop + layer->offset().fY), |
| layer->paint()); |
| } |
| canvas->restore(); |
| } |
| |
| // Used by GrRecordReplaceDraw. It intercepts nested drawPicture calls and |
| // also draws them with replaced layers. |
| class ReplaceDraw : public SkRecords::Draw { |
| public: |
| ReplaceDraw(SkCanvas* canvas, GrLayerCache* layerCache, |
| SkPicture const* const drawablePicts[], int drawableCount, |
| const SkPicture* topLevelPicture, |
| const SkBigPicture* picture, |
| const SkMatrix& initialMatrix, |
| SkPicture::AbortCallback* callback, |
| const int* opIndices, int numIndices) |
| : INHERITED(canvas, drawablePicts, nullptr, drawableCount) |
| , fCanvas(canvas) |
| , fLayerCache(layerCache) |
| , fTopLevelPicture(topLevelPicture) |
| , fPicture(picture) |
| , fInitialMatrix(initialMatrix) |
| , fCallback(callback) |
| , fIndex(0) |
| , fNumReplaced(0) { |
| fOpIndexStack.append(numIndices, opIndices); |
| } |
| |
| int draw() { |
| const SkBBoxHierarchy* bbh = fPicture->bbh(); |
| const SkRecord* record = fPicture->record(); |
| if (nullptr == record) { |
| return 0; |
| } |
| |
| fNumReplaced = 0; |
| |
| fOps.rewind(); |
| |
| 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 = { 0, 0, 0, 0 }; |
| (void)fCanvas->getClipBounds(&query); |
| |
| bbh->search(query, &fOps); |
| |
| for (fIndex = 0; fIndex < fOps.count(); ++fIndex) { |
| if (fCallback && fCallback->abort()) { |
| return fNumReplaced; |
| } |
| |
| record->visit<void>(fOps[fIndex], *this); |
| } |
| |
| } else { |
| for (fIndex = 0; fIndex < (int) record->count(); ++fIndex) { |
| if (fCallback && fCallback->abort()) { |
| return fNumReplaced; |
| } |
| |
| record->visit<void>(fIndex, *this); |
| } |
| } |
| |
| return fNumReplaced; |
| } |
| |
| // Same as Draw for all ops except DrawPicture and SaveLayer. |
| template <typename T> void operator()(const T& r) { |
| this->INHERITED::operator()(r); |
| } |
| void operator()(const SkRecords::DrawPicture& dp) { |
| |
| int drawPictureOffset; |
| if (fOps.count()) { |
| drawPictureOffset = fOps[fIndex]; |
| } else { |
| drawPictureOffset = fIndex; |
| } |
| |
| fOpIndexStack.push(drawPictureOffset); |
| |
| SkAutoCanvasMatrixPaint acmp(fCanvas, &dp.matrix, dp.paint, dp.picture->cullRect()); |
| |
| if (const SkBigPicture* bp = dp.picture->asSkBigPicture()) { |
| // Draw sub-pictures with the same replacement list but a different picture |
| ReplaceDraw draw(fCanvas, fLayerCache, |
| this->drawablePicts(), this->drawableCount(), |
| fTopLevelPicture, bp, fInitialMatrix, fCallback, |
| fOpIndexStack.begin(), fOpIndexStack.count()); |
| fNumReplaced += draw.draw(); |
| } else { |
| // TODO: can we assume / assert this doesn't happen? |
| dp.picture->playback(fCanvas, fCallback); |
| } |
| |
| fOpIndexStack.pop(); |
| } |
| void operator()(const SkRecords::SaveLayer& sl) { |
| |
| // For a saveLayer command, check if it can be replaced by a drawBitmap |
| // call and, if so, draw it and then update the current op index accordingly. |
| int startOffset; |
| if (fOps.count()) { |
| startOffset = fOps[fIndex]; |
| } else { |
| startOffset = fIndex; |
| } |
| |
| fOpIndexStack.push(startOffset); |
| |
| GrCachedLayer* layer = fLayerCache->findLayer(fTopLevelPicture->uniqueID(), |
| fInitialMatrix, |
| fOpIndexStack.begin(), |
| fOpIndexStack.count()); |
| |
| if (layer) { |
| fNumReplaced++; |
| |
| draw_replacement_bitmap(layer, fCanvas); |
| |
| if (fPicture->bbh()) { |
| while (fOps[fIndex] < layer->stop()) { |
| ++fIndex; |
| } |
| SkASSERT(fOps[fIndex] == layer->stop()); |
| } else { |
| fIndex = layer->stop(); |
| } |
| fOpIndexStack.pop(); |
| return; |
| } |
| |
| // This is a fail for layer hoisting |
| this->INHERITED::operator()(sl); |
| |
| fOpIndexStack.pop(); |
| } |
| |
| private: |
| SkCanvas* fCanvas; |
| GrLayerCache* fLayerCache; |
| const SkPicture* fTopLevelPicture; |
| const SkBigPicture* fPicture; |
| const SkMatrix fInitialMatrix; |
| SkPicture::AbortCallback* fCallback; |
| |
| SkTDArray<int> fOps; |
| int fIndex; |
| int fNumReplaced; |
| |
| // The op code indices of all the enclosing drawPicture and saveLayer calls |
| SkTDArray<int> fOpIndexStack; |
| |
| typedef Draw INHERITED; |
| }; |
| |
| int GrRecordReplaceDraw(const SkPicture* picture, |
| SkCanvas* canvas, |
| GrLayerCache* layerCache, |
| const SkMatrix& initialMatrix, |
| SkPicture::AbortCallback* callback) { |
| SkAutoCanvasRestore saveRestore(canvas, true /*save now, restore at exit*/); |
| |
| if (const SkBigPicture* bp = picture->asSkBigPicture()) { |
| // TODO: drawablePicts? |
| ReplaceDraw draw(canvas, layerCache, nullptr, 0, |
| bp, bp, |
| initialMatrix, callback, nullptr, 0); |
| return draw.draw(); |
| } else { |
| // TODO: can we assume / assert this doesn't happen? |
| picture->playback(canvas, callback); |
| return 0; |
| } |
| } |