| /* |
| * 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 "SkRecordDraw.h" |
| |
| namespace { |
| |
| // This is an SkRecord visitor that will draw that SkRecord to an SkCanvas. |
| class Draw : SkNoncopyable { |
| public: |
| explicit Draw(SkCanvas* canvas) : fCanvas(canvas), fIndex(0), fClipEmpty(false) {} |
| |
| unsigned index() const { return fIndex; } |
| void next() { ++fIndex; } |
| |
| // No base case, so we'll be compile-time checked that we implemented all possibilities below. |
| template <typename T> void operator()(const T&); |
| |
| private: |
| // Must be called after any potential clip change. |
| void updateClip() { fClipEmpty = fCanvas->isClipEmpty(); } |
| |
| SkCanvas* fCanvas; |
| unsigned fIndex; |
| bool fClipEmpty; |
| }; |
| |
| template <> void Draw::operator()(const SkRecords::PushCull& r) { |
| if (r.popOffset != SkRecords::kUnsetPopOffset && |
| fCanvas->quickReject(r.rect)) { |
| // We skip to the popCull, then the loop moves us just beyond it. |
| fIndex += r.popOffset; |
| } else { |
| fCanvas->pushCull(r.rect); |
| } |
| } |
| |
| // These commands might change the clip. |
| #define CASE(T, call) \ |
| template <> void Draw::operator()(const SkRecords::T& r) { fCanvas->call; this->updateClip(); } |
| CASE(Restore, restore()); |
| CASE(SaveLayer, saveLayer(r.bounds, r.paint, r.flags)); |
| #undef CASE |
| |
| // These certainly do change the clip, |
| // but we can skip them if they're intersecting with a clip that's already empty. |
| #define CASE(T, call) template <> void Draw::operator()(const SkRecords::T& r) { \ |
| if (!(fClipEmpty && SkRegion::kIntersect_Op == r.op)) { fCanvas->call; this->updateClip(); } \ |
| } |
| CASE(ClipPath, clipPath(r.path, r.op, r.doAA)); |
| CASE(ClipRRect, clipRRect(r.rrect, r.op, r.doAA)); |
| CASE(ClipRect, clipRect(r.rect, r.op, r.doAA)); |
| CASE(ClipRegion, clipRegion(r.region, r.op)); |
| #undef CASE |
| |
| // Commands which must run regardless of the clip, but don't change it themselves. |
| #define CASE(T, call) \ |
| template <> void Draw::operator()(const SkRecords::T& r) { fCanvas->call; } |
| CASE(Save, save(r.flags)); |
| CASE(Clear, clear(r.color)); |
| CASE(PopCull, popCull()); |
| #undef CASE |
| |
| // Nothing fancy below here. These commands respect and don't change the clip. |
| #define CASE(T, call) \ |
| template <> void Draw::operator()(const SkRecords::T& r) { if (!fClipEmpty) fCanvas->call; } |
| CASE(Concat, concat(r.matrix)); |
| CASE(SetMatrix, setMatrix(r.matrix)); |
| |
| CASE(DrawBitmap, drawBitmap(r.bitmap, r.left, r.top, r.paint)); |
| CASE(DrawBitmapMatrix, drawBitmapMatrix(r.bitmap, r.matrix, r.paint)); |
| CASE(DrawBitmapNine, drawBitmapNine(r.bitmap, r.center, r.dst, r.paint)); |
| CASE(DrawBitmapRectToRect, drawBitmapRectToRect(r.bitmap, r.src, r.dst, r.paint, r.flags)); |
| CASE(DrawDRRect, drawDRRect(r.outer, r.inner, r.paint)); |
| CASE(DrawOval, drawOval(r.oval, r.paint)); |
| CASE(DrawPaint, drawPaint(r.paint)); |
| CASE(DrawPath, drawPath(r.path, r.paint)); |
| CASE(DrawPoints, drawPoints(r.mode, r.count, r.pts, r.paint)); |
| CASE(DrawPosText, drawPosText(r.text, r.byteLength, r.pos, r.paint)); |
| CASE(DrawPosTextH, drawPosTextH(r.text, r.byteLength, r.xpos, r.y, r.paint)); |
| CASE(DrawRRect, drawRRect(r.rrect, r.paint)); |
| CASE(DrawRect, drawRect(r.rect, r.paint)); |
| CASE(DrawSprite, drawSprite(r.bitmap, r.left, r.top, r.paint)); |
| CASE(DrawText, drawText(r.text, r.byteLength, r.x, r.y, r.paint)); |
| CASE(DrawTextOnPath, drawTextOnPath(r.text, r.byteLength, r.path, r.matrix, r.paint)); |
| CASE(DrawVertices, drawVertices(r.vmode, r.vertexCount, r.vertices, r.texs, r.colors, |
| r.xmode.get(), r.indices, r.indexCount, r.paint)); |
| #undef CASE |
| |
| } // namespace |
| |
| void SkRecordDraw(const SkRecord& record, SkCanvas* canvas) { |
| for (Draw draw(canvas); draw.index() < record.count(); draw.next()) { |
| record.visit(draw.index(), draw); |
| } |
| } |