deferred canvas

src/utils/SkDeferredCanvas.h

 
 /*
- * Copyright 2011 Google Inc.
+ * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#ifndef SkNWayCanvas_DEFINED
-#define SkNWayCanvas_DEFINED
+#ifndef SkDeferredCanvas_DEFINED
+#define SkDeferredCanvas_DEFINED
 
 #include "../private/SkTDArray.h"
 #include "SkCanvas.h"
 
-class SK_API SkNWayCanvas : public SkCanvas {
+class SK_API SkDeferredCanvas : public SkCanvas {
 public:
-    SkNWayCanvas(int width, int height);
-    virtual ~SkNWayCanvas();
-
-    virtual void addCanvas(SkCanvas*);
-    virtual void removeCanvas(SkCanvas*);
-    virtual void removeAll();
-
-    ///////////////////////////////////////////////////////////////////////////
-    // These are forwarded to the N canvases we're referencing
+    SkDeferredCanvas(SkCanvas*);
+    ~SkDeferredCanvas() override;
 
 #ifdef SK_SUPPORT_LEGACY_DRAWFILTER
     SkDrawFilter* setDrawFilter(SkDrawFilter*) override;
 #endif
 
 protected:
-    SkTDArray<SkCanvas*> fList;
+    sk_sp<SkSurface> onNewSurface(const SkImageInfo&, const SkSurfaceProps&) override;
+    SkISize getBaseLayerSize() const override;
+    bool getClipBounds(SkRect* bounds) const override;
+    bool getClipDeviceBounds(SkIRect* bounds) const override;
+    bool isClipEmpty() const override;
+    bool isClipRect() const override;
+    bool onPeekPixels(SkPixmap*) override;
+    bool onAccessTopLayerPixels(SkPixmap*) override;
+    SkImageInfo onImageInfo() const override;
+    bool onGetProps(SkSurfaceProps*) const override;
+    void onFlush() override;
+//    SkCanvas* canvasForDrawIter() override;
 
     void willSave() override;
     SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec&) override;
     void willRestore() override;
 
     void didConcat(const SkMatrix&) override;
     void didSetMatrix(const SkMatrix&) override;
 
     void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) override;
     virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
@@ skipping 17 matching lines @@
     void onDrawRRect(const SkRRect&, const SkPaint&) override;
     void onDrawPath(const SkPath&, const SkPaint&) override;
     void onDrawBitmap(const SkBitmap&, SkScalar left, SkScalar top, const SkPaint*) override;
     void onDrawBitmapRect(const SkBitmap&, const SkRect* src, const SkRect& dst, const SkPaint*,
                           SrcRectConstraint) override;
     void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*) override;
     void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
                          const SkPaint*, SrcRectConstraint) override;
     void onDrawBitmapNine(const SkBitmap&, const SkIRect& center, const SkRect& dst,
                           const SkPaint*) override;
+    void onDrawImageNine(const SkImage* image, const SkIRect& center,
+                         const SkRect& dst, const SkPaint*) override;
     void onDrawVertices(VertexMode vmode, int vertexCount,
                               const SkPoint vertices[], const SkPoint texs[],
                               const SkColor colors[], SkXfermode* xmode,
                               const uint16_t indices[], int indexCount,
                               const SkPaint&) override;
+    void onDrawAtlas(const SkImage* image, const SkRSXform xform[],
+                     const SkRect rects[], const SkColor colors[],
+                     int count, SkXfermode::Mode mode,
+                     const SkRect* cull, const SkPaint* paint) override;
 
     void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) override;
     void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) override;
     void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) override;
     void onClipRegion(const SkRegion&, SkRegion::Op) override;
 
+    void onDrawDrawable(SkDrawable*, const SkMatrix*) override;
     void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) override;
     void onDrawAnnotation(const SkRect&, const char[], SkData*) override;
 
     class Iter;
 
 private:
+    SkCanvas* fCanvas;
+
+    enum Type {
+        kSave_Type,
+        kClipRect_Type,
+        kTrans_Type,
+        kScaleTrans_Type,
+    };
+    struct Rec {
+        Type    fType;
+        union {
+            int         fSaveCount;
+            SkRect      fBounds;
+            SkVector    fTranslate;
+            struct {
+                SkVector    fScale;
+                SkVector    fTrans; // post translate
+            } fScaleTrans;
+        } fData;
+
+        bool isConcat(SkMatrix*) const;
+        void getConcat(SkMatrix* mat) const {
+            SkDEBUGCODE(bool isconcat = ) this->isConcat(mat);
+            SkASSERT(isconcat);

[f(malita), 2016/07/07 15:24:07]

Nit: SkAssertResult?

+        }
+        void setConcat(const SkMatrix&);
+    };
+    SkTDArray<Rec>  fRecs;
+    int             fSaveCount;
+
+    void push_save();
+    void push_cliprect(const SkRect&);
+    bool push_concat(const SkMatrix&);
+    
+    void emit(const Rec& rec);
+
+    void flush_all();
+    void flush_before_saves();
+    void flush_le(int index);
+    void flush_translate(SkScalar* x, SkScalar* y, const SkPaint&);
+    void flush_translate(SkScalar* x, SkScalar* y, const SkRect& bounds, const SkPaint* = nullptr);
+    void flush_check(SkRect* bounds, const SkPaint*, unsigned flags = 0);
+
+    void internal_flush_translate(SkScalar* x, SkScalar* y, const SkRect* boundsOrNull);
+
     typedef SkCanvas INHERITED;
 };
 
 
 #endif