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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkBBoxRecord_DEFINED
#define SkBBoxRecord_DEFINED
#include "SkPictureRecord.h"
#include "SkTDArray.h"
/**
* This is an abstract SkPictureRecord subclass that intercepts draw calls and computes an
* axis-aligned bounding box for each draw that it sees, subclasses implement handleBBox()
* which will be called every time we get a new bounding box.
*/
class SkBBoxRecord : public SkPictureRecord {
public:
SkBBoxRecord(const SkISize& size, uint32_t recordFlags)
: INHERITED(size, recordFlags) {
}
virtual ~SkBBoxRecord();
/**
* This is called each time we get a bounding box, it will be axis-aligned,
* in device coordinates, and expanded to include stroking, shadows, etc.
*/
virtual void handleBBox(const SkRect& bbox) = 0;
virtual void drawOval(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE;
virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE;
virtual void drawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE;
virtual void drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE;
virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
const SkPaint& paint) SK_OVERRIDE;
virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE;
virtual void clear(SkColor) SK_OVERRIDE;
virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
const SkPaint* paint = NULL) SK_OVERRIDE;
virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
const SkRect& dst, const SkPaint* paint,
DrawBitmapRectFlags flags) SK_OVERRIDE;
virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& mat,
const SkPaint* paint) SK_OVERRIDE;
virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint* paint) SK_OVERRIDE;
virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
const SkPaint* paint) SK_OVERRIDE;
virtual void drawVertices(VertexMode mode, int vertexCount,
const SkPoint vertices[], const SkPoint texs[],
const SkColor colors[], SkXfermode* xfer,
const uint16_t indices[], int indexCount,
const SkPaint& paint) SK_OVERRIDE;
protected:
virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE;
virtual void onDrawText(const void* text, size_t byteLength, SkScalar x, SkScalar y,
const SkPaint&) SK_OVERRIDE;
virtual void onDrawPosText(const void* text, size_t byteLength, const SkPoint pos[],
const SkPaint&) SK_OVERRIDE;
virtual void onDrawPosTextH(const void* text, size_t byteLength, const SkScalar xpos[],
SkScalar constY, const SkPaint&) SK_OVERRIDE;
virtual void onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path,
const SkMatrix* matrix, const SkPaint&) SK_OVERRIDE;
virtual void onDrawPatch(const SkPoint cubics[12], const SkColor colors[4],
const SkPoint texCoords[4], SkXfermode* xmode,
const SkPaint& paint) SK_OVERRIDE;
virtual void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) SK_OVERRIDE;
virtual void willSave() SK_OVERRIDE;
virtual SaveLayerStrategy willSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK_OVERRIDE;
virtual void willRestore() SK_OVERRIDE;
private:
/**
* Takes a bounding box in current canvas view space, accounts for stroking and effects, and
* computes an axis-aligned bounding box in device coordinates, then passes it to handleBBox()
* returns false if the draw is completely clipped out, and may safely be ignored.
**/
bool transformBounds(const SkRect& bounds, const SkPaint* paint);
/**
* Paints from currently-active saveLayers that need to be applied to bounding boxes of all
* primitives drawn inside them. We own these pointers.
**/
SkTDArray<const SkPaint*> fSaveStack;
typedef SkPictureRecord INHERITED;
};
#endif
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