From b7636d3fadeceb803de58441bffb0448fba69fda Mon Sep 17 00:00:00 2001 From: "robertphillips@google.com" Date: Thu, 21 Mar 2013 21:22:03 +0000 Subject: Reverting 8313 (SVG turbulence) due to Ubuntu failures git-svn-id: http://skia.googlecode.com/svn/trunk@8316 2bbb7eff-a529-9590-31e7-b0007b416f81 --- include/effects/SkPerlinNoiseShader.h | 111 ---------------------------------- 1 file changed, 111 deletions(-) delete mode 100644 include/effects/SkPerlinNoiseShader.h (limited to 'include') diff --git a/include/effects/SkPerlinNoiseShader.h b/include/effects/SkPerlinNoiseShader.h deleted file mode 100644 index d7c52c7324..0000000000 --- a/include/effects/SkPerlinNoiseShader.h +++ /dev/null @@ -1,111 +0,0 @@ -/* - * 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 SkPerlinNoiseShader_DEFINED -#define SkPerlinNoiseShader_DEFINED - -#include "SkShader.h" - -/** \class SkPerlinNoiseShader - - SkPerlinNoiseShader creates an image using the Perlin turbulence function. - - It can produce tileable noise if asked to stitch tiles and provided a tile size. - In order to fill a large area with repeating noise, set the stitchTiles flag to - true, and render exactly a single tile of noise. Without this flag, the result - will contain visible seams between tiles. - - The algorithm used is described here : - http://www.w3.org/TR/SVG/filters.html#feTurbulenceElement -*/ -class SkPerlinNoiseShader : public SkShader { - struct PaintingData; -public: - struct StitchData; - - /** - * About the noise types : the difference between the 2 is just minor tweaks to the algorithm, - * they're not 2 entirely different noises. The output looks different, but once the noise is - * generated in the [1, -1] range, the output is brought back in the [0, 1] range by doing : - * kFractalNoise_Type : noise * 0.5 + 0.5 - * kTurbulence_Type : abs(noise) - * Very little differences between the 2 types, although you can tell the difference visually. - */ - enum Type { - kFractalNoise_Type, - kTurbulence_Type, - kFirstType = kFractalNoise_Type, - kLastType = kTurbulence_Type - }; - /** - * This will construct Perlin noise of the given type (Fractal Noise or Turbulence). - * - * Both base frequencies (X and Y) have a usual range of (0..1). - * - * The number of octaves provided should be fairly small, although no limit is enforced. - * Each octave doubles the frequency, so 10 octaves would produce noise from - * baseFrequency * 1, * 2, * 4, ..., * 512, which quickly yields insignificantly small - * periods and resembles regular unstructured noise rather than Perlin noise. - * - * If tileSize isn't NULL or an empty size, the tileSize parameter will be used to modify - * the frequencies so that the noise will be tileable for the given tile size. If tileSize - * is NULL or an empty size, the frequencies will be used as is without modification. - */ - static SkShader* CreateFractalNoise(SkScalar baseFrequencyX, SkScalar baseFrequencyY, - int numOctaves, SkScalar seed, - const SkISize* tileSize = NULL); - static SkShader* CreateTubulence(SkScalar baseFrequencyX, SkScalar baseFrequencyY, - int numOctaves, SkScalar seed, - const SkISize* tileSize = NULL); - - virtual bool setContext(const SkBitmap& device, const SkPaint& paint, - const SkMatrix& matrix); - virtual void shadeSpan(int x, int y, SkPMColor[], int count) SK_OVERRIDE; - virtual void shadeSpan16(int x, int y, uint16_t[], int count) SK_OVERRIDE; - - virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint&) const SK_OVERRIDE; - - SK_DEVELOPER_TO_STRING() - SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPerlinNoiseShader) - -protected: - SkPerlinNoiseShader(SkFlattenableReadBuffer&); - virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; - -private: - SkPerlinNoiseShader(SkPerlinNoiseShader::Type type, SkScalar baseFrequencyX, - SkScalar baseFrequencyY, int numOctaves, SkScalar seed, - const SkISize* tileSize = NULL); - virtual ~SkPerlinNoiseShader(); - - void setTileSize(const SkISize&); - - void initPaint(PaintingData& paintingData); - - SkScalar noise2D(int channel, const PaintingData& paintingData, - const StitchData& stitchData, const SkPoint& noiseVector); - - SkScalar calculateTurbulenceValueForPoint(int channel, const PaintingData& paintingData, - StitchData& stitchData, const SkPoint& point); - - SkPMColor shade(const SkPoint& point, StitchData& stitchData); - - SkPerlinNoiseShader::Type fType; - SkScalar fBaseFrequencyX; - SkScalar fBaseFrequencyY; - int fNumOctaves; - SkScalar fSeed; - SkISize fTileSize; - bool fStitchTiles; - SkMatrix fMatrix; - - PaintingData* fPaintingData; - - typedef SkShader INHERITED; -}; - -#endif -- cgit v1.2.3