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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() {}
void beginCommentGroup(const char* description) SK_OVERRIDE {}
void addComment(const char* kywd, const char* value) SK_OVERRIDE {}
void endCommentGroup() SK_OVERRIDE {}
SkDrawFilter* setDrawFilter(SkDrawFilter* filter) SK_OVERRIDE {return NULL;}
bool isClipEmpty() const SK_OVERRIDE { return false; }
bool getClipBounds(SkRect* bounds) const SK_OVERRIDE {
if (NULL != bounds) {
bounds->setXYWH(0, 0,
SkIntToScalar(this->imageInfo().width()),
SkIntToScalar(this->imageInfo().height()));
}
return true;
}
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 SaveLayerStrategy willSaveLayer(const SkRect* bounds, const SkPaint* paint,
SaveFlags flags) SK_OVERRIDE {
this->INHERITED::willSaveLayer(bounds, paint, flags);
return kNoLayer_SaveLayerStrategy;
}
virtual void onDrawText(const void* text, size_t byteLength, SkScalar x,
SkScalar y, const SkPaint& paint) SK_OVERRIDE {}
virtual void onDrawPosText(const void* text, size_t byteLength,
const SkPoint pos[], const SkPaint& paint) SK_OVERRIDE {}
virtual void onDrawPosTextH(const void* text, size_t byteLength,
const SkScalar xpos[], SkScalar constY,
const SkPaint& paint) SK_OVERRIDE {}
virtual void onDrawTextOnPath(const void* text, size_t byteLength,
const SkPath& path, const SkMatrix* matrix,
const SkPaint& paint) SK_OVERRIDE {}
void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE {}
void onClipRegion(const SkRegion&, SkRegion::Op) SK_OVERRIDE {}
void onDrawPicture(const SkPicture*, const SkMatrix*, const SkPaint*) SK_OVERRIDE {}
void onDrawPaint(const SkPaint& paint) SK_OVERRIDE {}
void onDrawPoints(PointMode mode, size_t count, const SkPoint pts[],
const SkPaint& paint) SK_OVERRIDE {}
void onDrawRect(const SkRect& rect, const SkPaint& paint) SK_OVERRIDE {}
void onDrawOval(const SkRect& oval, const SkPaint&) SK_OVERRIDE {}
void onDrawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE {}
void onDrawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE {}
void onDrawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
const SkPaint* paint = NULL) SK_OVERRIDE {}
void onDrawBitmapRect(const SkBitmap& bitmap, const SkRect* src,
const SkRect& dst,
const SkPaint* paint,
DrawBitmapRectFlags flags) SK_OVERRIDE {}
void onDrawImage(const SkImage*, SkScalar left, SkScalar top, const SkPaint*) SK_OVERRIDE {}
void onDrawImageRect(const SkImage*, const SkRect* src, const SkRect& dst,
const SkPaint*) SK_OVERRIDE{}
void onDrawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
const SkRect& dst, const SkPaint* paint = NULL) SK_OVERRIDE {}
void onDrawSprite(const SkBitmap& bitmap, int left, int top,
const SkPaint* paint = NULL) SK_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& paint) SK_OVERRIDE {}
private:
typedef SkCanvas INHERITED;
};
#endif // SkNulCanvas_DEFINED
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