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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) SK_OVERRIDE {return 0;}
virtual int saveLayer(const SkRect* bounds, const SkPaint* paint,
SaveFlags flags = kARGB_ClipLayer_SaveFlag) SK_OVERRIDE {return 0;}
int saveLayerAlpha(const SkRect* bounds, U8CPU alpha,
SaveFlags flags = kARGB_ClipLayer_SaveFlag) {return 0;}
virtual void restore() SK_OVERRIDE {}
int getSaveCount() const {return 0;}
virtual bool isDrawingToLayer() const SK_OVERRIDE {return false;}
virtual bool translate(SkScalar dx, SkScalar dy) SK_OVERRIDE {return true;}
virtual bool scale(SkScalar sx, SkScalar sy) SK_OVERRIDE {return true;}
virtual bool rotate(SkScalar degrees) SK_OVERRIDE {return true;}
virtual bool skew(SkScalar sx, SkScalar sy) SK_OVERRIDE {return true;}
virtual bool concat(const SkMatrix& matrix) SK_OVERRIDE {return true;}
virtual void setMatrix(const SkMatrix& matrix) SK_OVERRIDE {}
virtual void clear(SkColor) SK_OVERRIDE {}
virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE {}
virtual void drawPoints(PointMode mode, size_t count, const SkPoint pts[],
const SkPaint& paint) SK_OVERRIDE {}
virtual void drawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE {}
virtual void drawOval(const SkRect& oval, const SkPaint&) SK_OVERRIDE {}
virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE {}
virtual void drawPath(const SkPath& path, const SkPaint& paint) 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& m,
const SkPaint* paint = NULL) SK_OVERRIDE {}
virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint* paint = NULL) SK_OVERRIDE {}
virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
const SkPaint* paint = NULL) SK_OVERRIDE {}
virtual void drawText(const void* text, size_t byteLength, SkScalar x,
SkScalar y, const SkPaint& paint) SK_OVERRIDE {}
virtual void drawPosText(const void* text, size_t byteLength,
const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE {}
virtual void drawPosTextH(const void* text, size_t byteLength,
const SkScalar xpos[], SkScalar constY,
const SkPaint& paint) SK_OVERRIDE {}
virtual void drawTextOnPath(const void* text, size_t byteLength,
const SkPath& path, const SkMatrix* matrix,
const SkPaint& paint) SK_OVERRIDE {}
virtual void drawPicture(SkPicture& picture) SK_OVERRIDE {}
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) SK_OVERRIDE {}
virtual void drawData(const void* data, size_t length) SK_OVERRIDE {}
virtual void beginCommentGroup(const char* description) SK_OVERRIDE {}
virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE {}
virtual void endCommentGroup() SK_OVERRIDE {}
virtual SkBounder* setBounder(SkBounder* bounder) SK_OVERRIDE {return NULL;}
virtual SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE {return NULL;}
virtual bool isClipEmpty() const SK_OVERRIDE { return false; }
virtual ClipType getClipType() const SK_OVERRIDE { return kRect_ClipType; }
virtual bool getClipBounds(SkRect* bounds) const SK_OVERRIDE {
if (NULL != bounds) {
bounds->setXYWH(0, 0,
SkIntToScalar(this->imageInfo().fWidth),
SkIntToScalar(this->imageInfo().fHeight));
}
return true;
}
virtual bool getClipDeviceBounds(SkIRect* bounds) const SK_OVERRIDE {
if (NULL != bounds) {
bounds->setLargest();
}
return true;
}
protected:
virtual SkCanvas* canvasForDrawIter() {return NULL;}
virtual SkBaseDevice* setDevice(SkBaseDevice* device) {return NULL;}
virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
virtual void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE {}
private:
typedef SkCanvas INHERITED;
};
#endif // SkNulCanvas_DEFINED
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