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gfx/skia/trunk/src/effects/gradients/SkTwoPointConicalGradient.h@b8a032363ba2 (annotated)

gfx/skia/trunk/src/effects/gradients/SkTwoPointConicalGradient.h

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0	1
michael@0	2	/*
michael@0	3	* Copyright 2012 Google Inc.
michael@0	4	*
michael@0	5	* Use of this source code is governed by a BSD-style license that can be
michael@0	6	* found in the LICENSE file.
michael@0	7	*/
michael@0	8
michael@0	9	#ifndef SkTwoPointConicalGradient_DEFINED
michael@0	10	#define SkTwoPointConicalGradient_DEFINED
michael@0	11
michael@0	12	#include "SkGradientShaderPriv.h"
michael@0	13
michael@0	14	struct TwoPtRadial {
michael@0	15	enum {
michael@0	16	kDontDrawT = 0x80000000
michael@0	17	};
michael@0	18
michael@0	19	float fCenterX, fCenterY;
michael@0	20	float fDCenterX, fDCenterY;
michael@0	21	float fRadius;
michael@0	22	float fDRadius;
michael@0	23	float fA;
michael@0	24	float fRadius2;
michael@0	25	float fRDR;
michael@0	26
michael@0	27	void init(const SkPoint& center0, SkScalar rad0,
michael@0	28	const SkPoint& center1, SkScalar rad1);
michael@0	29
michael@0	30	// used by setup and nextT
michael@0	31	float fRelX, fRelY, fIncX, fIncY;
michael@0	32	float fB, fDB;
michael@0	33
michael@0	34	void setup(SkScalar fx, SkScalar fy, SkScalar dfx, SkScalar dfy);
michael@0	35	SkFixed nextT();
michael@0	36
michael@0	37	static bool DontDrawT(SkFixed t) {
michael@0	38	return kDontDrawT == (uint32_t)t;
michael@0	39	}
michael@0	40	};
michael@0	41
michael@0	42
michael@0	43	class SkTwoPointConicalGradient : public SkGradientShaderBase {
michael@0	44	TwoPtRadial fRec;
michael@0	45	void init();
michael@0	46
michael@0	47	public:
michael@0	48	SkTwoPointConicalGradient(const SkPoint& start, SkScalar startRadius,
michael@0	49	const SkPoint& end, SkScalar endRadius,
michael@0	50	const Descriptor&);
michael@0	51
michael@0	52	virtual void shadeSpan(int x, int y, SkPMColor* dstCParam,
michael@0	53	int count) SK_OVERRIDE;
michael@0	54	virtual bool setContext(const SkBitmap& device,
michael@0	55	const SkPaint& paint,
michael@0	56	const SkMatrix& matrix) SK_OVERRIDE;
michael@0	57
michael@0	58	virtual BitmapType asABitmap(SkBitmap* bitmap,
michael@0	59	SkMatrix* matrix,
michael@0	60	TileMode* xy) const;
michael@0	61	virtual SkShader::GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
michael@0	62	virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint& paint) const SK_OVERRIDE;
michael@0	63	virtual bool isOpaque() const SK_OVERRIDE;
michael@0	64
michael@0	65	SkScalar getCenterX1() const { return SkPoint::Distance(fCenter1, fCenter2); }
michael@0	66	SkScalar getStartRadius() const { return fRadius1; }
michael@0	67	SkScalar getDiffRadius() const { return fRadius2 - fRadius1; }
michael@0	68
michael@0	69	SK_TO_STRING_OVERRIDE()
michael@0	70	SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)
michael@0	71
michael@0	72	protected:
michael@0	73	SkTwoPointConicalGradient(SkReadBuffer& buffer);
michael@0	74	virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
michael@0	75
michael@0	76	private:
michael@0	77	typedef SkGradientShaderBase INHERITED;
michael@0	78	const SkPoint fCenter1;
michael@0	79	const SkPoint fCenter2;
michael@0	80	const SkScalar fRadius1;
michael@0	81	const SkScalar fRadius2;
michael@0	82	};
michael@0	83
michael@0	84	#endif