skia2/include/utils/SkDumpCanvas.h
2012-01-28 01:45:11 +00:00

148 lines
5.3 KiB
C++

/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkDumpCanvas_DEFINED
#define SkDumpCanvas_DEFINED
#include "SkCanvas.h"
/** This class overrides all the draw methods on SkCanvas, and formats them
as text, and then sends that to a Dumper helper object.
Typical use might be to dump a display list to a log file to see what is
being drawn.
*/
class SkDumpCanvas : public SkCanvas {
public:
class Dumper;
explicit SkDumpCanvas(Dumper* = 0);
virtual ~SkDumpCanvas();
enum Verb {
kNULL_Verb,
kSave_Verb,
kRestore_Verb,
kMatrix_Verb,
kClip_Verb,
kDrawPaint_Verb,
kDrawPoints_Verb,
kDrawRect_Verb,
kDrawPath_Verb,
kDrawBitmap_Verb,
kDrawText_Verb,
kDrawPicture_Verb,
kDrawVertices_Verb,
kDrawData_Verb
};
/** Subclasses of this are installed on the DumpCanvas, and then called for
each drawing command.
*/
class Dumper : public SkRefCnt {
public:
virtual void dump(SkDumpCanvas*, SkDumpCanvas::Verb, const char str[],
const SkPaint*) = 0;
};
Dumper* getDumper() const { return fDumper; }
void setDumper(Dumper*);
int getNestLevel() const { return fNestLevel; }
virtual int save(SaveFlags) SK_OVERRIDE;
virtual int saveLayer(const SkRect* bounds, const SkPaint* paint,
SaveFlags) SK_OVERRIDE;
virtual void restore() SK_OVERRIDE;
virtual bool translate(SkScalar dx, SkScalar dy) SK_OVERRIDE;
virtual bool scale(SkScalar sx, SkScalar sy) SK_OVERRIDE;
virtual bool rotate(SkScalar degrees) SK_OVERRIDE;
virtual bool skew(SkScalar sx, SkScalar sy) SK_OVERRIDE;
virtual bool concat(const SkMatrix& matrix) SK_OVERRIDE;
virtual void setMatrix(const SkMatrix& matrix) SK_OVERRIDE;
virtual bool clipRect(const SkRect&, SkRegion::Op, bool) SK_OVERRIDE;
virtual bool clipPath(const SkPath&, SkRegion::Op, bool) SK_OVERRIDE;
virtual bool clipRegion(const SkRegion& deviceRgn,
SkRegion::Op) 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 drawPath(const SkPath& path, const SkPaint& paint) SK_OVERRIDE;
virtual void drawBitmap(const SkBitmap& bitmap, SkScalar left, SkScalar top,
const SkPaint* paint) SK_OVERRIDE;
virtual void drawBitmapRect(const SkBitmap& bitmap, const SkIRect* src,
const SkRect& dst, const SkPaint* paint) SK_OVERRIDE;
virtual void drawBitmapMatrix(const SkBitmap& bitmap, const SkMatrix& m,
const SkPaint* paint) SK_OVERRIDE;
virtual void drawSprite(const SkBitmap& bitmap, int left, int top,
const SkPaint* paint) 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&) 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*, size_t) SK_OVERRIDE;
private:
Dumper* fDumper;
int fNestLevel; // for nesting recursive elements like pictures
void dump(Verb, const SkPaint*, const char format[], ...);
typedef SkCanvas INHERITED;
};
/** Formats the draw commands, and send them to a function-pointer provided
by the caller.
*/
class SkFormatDumper : public SkDumpCanvas::Dumper {
public:
SkFormatDumper(void (*)(const char text[], void* refcon), void* refcon);
// override from baseclass that does the formatting, and in turn calls
// the function pointer that was passed to the constructor
virtual void dump(SkDumpCanvas*, SkDumpCanvas::Verb, const char str[],
const SkPaint*) SK_OVERRIDE;
private:
void (*fProc)(const char*, void*);
void* fRefcon;
typedef SkDumpCanvas::Dumper INHERITED;
};
/** Subclass of Dumper that dumps the drawing command to SkDebugf
*/
class SkDebugfDumper : public SkFormatDumper {
public:
SkDebugfDumper();
private:
typedef SkFormatDumper INHERITED;
};
#endif