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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkNulCanvas_DEFINED
#define SkNulCanvas_DEFINED
#include "SkCanvas.h"
/** \class SkNulCanvas
*
* Nul Canvas is a canvas that does nothing. It is used to measure the perf of just parsing
* a pdf, without actually rendering anything.
*
*/
class SK_API SkNulCanvas : public SkCanvas {
public:
SK_DECLARE_INST_COUNT(SkNulCanvas);
SkNulCanvas() {}
explicit SkNulCanvas(SkBaseDevice* device) : SkCanvas(device) {}
explicit SkNulCanvas(const SkBitmap& bitmap) : SkCanvas(bitmap) {}
virtual ~SkNulCanvas() {}
virtual int save(SaveFlags flags = kMatrixClip_SaveFlag) {return 0;}
virtual int saveLayer(const SkRect* bounds, const SkPaint* paint,
SaveFlags flags = kARGB_ClipLayer_SaveFlag) {return 0;}
int saveLayerAlpha(const SkRect* bounds, U8CPU alpha,
SaveFlags flags = kARGB_ClipLayer_SaveFlag) {return 0;}
virtual void restore() {}
int getSaveCount() const {return 0;}
virtual bool isDrawingToLayer() const {return false;}
virtual bool translate(SkScalar dx, SkScalar dy) {return true;}
virtual bool scale(SkScalar sx, SkScalar sy) {return true;}
virtual bool rotate(SkScalar degrees) {return true;}
virtual bool skew(SkScalar sx, SkScalar sy) {return true;}
virtual bool concat(const SkMatrix& matrix) {return true;}
virtual void setMatrix(const SkMatrix& matrix) {}
virtual bool clipRect(const SkRect& rect,
SkRegion::Op op = SkRegion::kIntersect_Op,
bool doAntiAlias = false) {return true;}
virtual bool clipRRect(const SkRRect& rrect,
SkRegion::Op op = SkRegion::kIntersect_Op,
bool doAntiAlias = false) {return true;}
virtual bool clipPath(const SkPath& path,
SkRegion::Op op = SkRegion::kIntersect_Op,
bool doAntiAlias = false) {return true;}
virtual bool clipRegion(const SkRegion& deviceRgn,
SkRegion::Op op = SkRegion::kIntersect_Op) {return true;}
virtual void clear(SkColor) {}
virtual void drawPaint(const SkPaint& paint) {}
virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
const SkPaint& paint) {}
virtual void drawRect(const SkRect& rect, const SkPaint& paint) {}
virtual void drawOval(const SkRect& oval, const SkPaint&) {}
virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) {}
virtual void drawPath(const SkPath& path, const SkPaint& paint) {}
virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
const SkPaint* paint = NULL) {}
virtual void drawBitmapRectToRect(const SkBitmap& bitmap, const SkRect* src,
const SkRect& dst,
const SkPaint* paint,
DrawBitmapRectFlags flags) {}
virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m,
const SkPaint* paint = NULL) {}
virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint* paint = NULL) {}
virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
const SkPaint* paint = NULL) {}
virtual void drawText(const void* text, size_t byteLength, SkScalar x,
SkScalar y, const SkPaint& paint) {}
virtual void drawPosText(const void* text, size_t byteLength,
const SkPoint pos[], const SkPaint& paint) {}
virtual void drawPosTextH(const void* text, size_t byteLength,
const SkScalar xpos[], SkScalar constY,
const SkPaint& paint) {}
virtual void drawTextOnPath(const void* text, size_t byteLength,
const SkPath& path, const SkMatrix* matrix,
const SkPaint& paint) {}
virtual void drawPicture(SkPicture& picture) {}
virtual void drawVertices(VertexMode vmode, int vertexCount,
const SkPoint vertices[], const SkPoint texs[],
const SkColor colors[], SkXfermode* xmode,
const uint16_t indices[], int indexCount,
const SkPaint& paint) {}
virtual void drawData(const void* data, size_t length) {}
virtual void beginCommentGroup(const char* description) {}
virtual void addComment(const char* kywd, const char* value) {}
virtual void endCommentGroup() {}
virtual SkBounder* setBounder(SkBounder* bounder) {return NULL;}
virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) {return NULL;}
protected:
virtual SkCanvas* canvasForDrawIter() {return NULL;}
virtual SkBaseDevice* setDevice(SkBaseDevice* device) {return NULL;}
private:
typedef SkCanvas INHERITED;
};
#endif // SkNulCanvas_DEFINED
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