diff options
| -rw-r--r-- | gm/perlinnoise.cpp | 115 | ||||
| -rw-r--r-- | gyp/effects.gypi | 2 | ||||
| -rw-r--r-- | gyp/gmslides.gypi | 1 | ||||
| -rw-r--r-- | include/effects/SkPerlinNoiseShader.h | 111 | ||||
| -rw-r--r-- | src/effects/SkPerlinNoiseShader.cpp | 998 |
5 files changed, 0 insertions, 1227 deletions
diff --git a/gm/perlinnoise.cpp b/gm/perlinnoise.cpp deleted file mode 100644 index fe4647fb43..0000000000 --- a/gm/perlinnoise.cpp +++ /dev/null @@ -1,115 +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. - */ - -#include "gm.h" -#include "SkBitmapSource.h" -#include "SkRectShaderImageFilter.h" -#include "SkPerlinNoiseShader.h" - -namespace skiagm { - -class PerlinNoiseGM : public GM { -public: - PerlinNoiseGM() { - this->setBGColor(0xFF000000); - fSize = SkISize::Make(80, 80); - } - -protected: - virtual SkString onShortName() { - return SkString("perlinnoise"); - } - - virtual SkISize onISize() { - return make_isize(500, 400); - } - - void drawClippedRect(SkCanvas* canvas, int x, int y, const SkPaint& paint) { - canvas->save(); - canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), - SkIntToScalar(fSize.width()), SkIntToScalar(fSize.height()))); - SkRect r = SkRect::MakeXYWH(x, y, SkIntToScalar(fSize.width()), - SkIntToScalar(fSize.height())); - canvas->drawRect(r, paint); - canvas->restore(); - } - - void test(SkCanvas* canvas, int x, int y, SkPerlinNoiseShader::Type type, - float baseFrequencyX, float baseFrequencyY, int numOctaves, float seed, - bool stitchTiles) - { - SkShader* shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ? - SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves, - seed, stitchTiles ? &fSize : NULL) : - SkPerlinNoiseShader::CreateTubulence(baseFrequencyX, baseFrequencyY, numOctaves, - seed, stitchTiles ? &fSize : NULL); - SkPaint paint; - paint.setShader(shader)->unref(); - drawClippedRect(canvas, x, y, paint); - } - - virtual void onDraw(SkCanvas* canvas) { - canvas->clear(0x00000000); - - test(canvas, 0, 0, SkPerlinNoiseShader::kFractalNoise_Type, - 0.1f, 0.1f, 2, 0, false); - test(canvas, 100, 0, SkPerlinNoiseShader::kFractalNoise_Type, - 0.4f, 0.2f, 3, 0, true); - test(canvas, 200, 0, SkPerlinNoiseShader::kFractalNoise_Type, - 0.3f, 0.6f, 4, 0, false); - test(canvas, 300, 0, SkPerlinNoiseShader::kFractalNoise_Type, - 0.2f, 0.4f, 5, 0, true); - test(canvas, 400, 0, SkPerlinNoiseShader::kFractalNoise_Type, - 0.5f, 0.8f, 6, 0, false); - - test(canvas, 0, 100, SkPerlinNoiseShader::kTurbulence_Type, - 0.1f, 0.1f, 2, 0, true); - test(canvas, 100, 100, SkPerlinNoiseShader::kTurbulence_Type, - 0.4f, 0.2f, 3, 0, false); - test(canvas, 200, 100, SkPerlinNoiseShader::kTurbulence_Type, - 0.3f, 0.6f, 4, 0, true); - test(canvas, 300, 100, SkPerlinNoiseShader::kTurbulence_Type, - 0.2f, 0.4f, 5, 0, false); - test(canvas, 400, 100, SkPerlinNoiseShader::kTurbulence_Type, - 0.5f, 0.8f, 6, 0, true); - - test(canvas, 0, 200, SkPerlinNoiseShader::kFractalNoise_Type, - 0.1f, 0.1f, 3, 1, false); - test(canvas, 100, 200, SkPerlinNoiseShader::kFractalNoise_Type, - 0.1f, 0.1f, 3, 2, false); - test(canvas, 200, 200, SkPerlinNoiseShader::kFractalNoise_Type, - 0.1f, 0.1f, 3, 3, false); - test(canvas, 300, 200, SkPerlinNoiseShader::kFractalNoise_Type, - 0.1f, 0.1f, 3, 4, false); - test(canvas, 400, 200, SkPerlinNoiseShader::kFractalNoise_Type, - 0.1f, 0.1f, 3, 5, false); - - canvas->scale(SkFloatToScalar(0.75f), SkFloatToScalar(1.0f)); - - test(canvas, 0, 300, SkPerlinNoiseShader::kFractalNoise_Type, - 0.1f, 0.1f, 2, 0, false); - test(canvas, 100, 300, SkPerlinNoiseShader::kFractalNoise_Type, - 0.4f, 0.2f, 3, 0, true); - test(canvas, 200, 300, SkPerlinNoiseShader::kFractalNoise_Type, - 0.3f, 0.6f, 4, 0, false); - test(canvas, 300, 300, SkPerlinNoiseShader::kFractalNoise_Type, - 0.2f, 0.4f, 5, 0, true); - test(canvas, 400, 300, SkPerlinNoiseShader::kFractalNoise_Type, - 0.5f, 0.8f, 6, 0, false); - } - -private: - typedef GM INHERITED; - SkISize fSize; -}; - -////////////////////////////////////////////////////////////////////////////// - -static GM* MyFactory(void*) { return new PerlinNoiseGM; } -static GMRegistry reg(MyFactory); - -} diff --git a/gyp/effects.gypi b/gyp/effects.gypi index e3f4bf5089..7dede6e441 100644 --- a/gyp/effects.gypi +++ b/gyp/effects.gypi @@ -41,7 +41,6 @@ '<(skia_src_path)/effects/SkMorphologyImageFilter.cpp', '<(skia_src_path)/effects/SkOffsetImageFilter.cpp', '<(skia_src_path)/effects/SkPaintFlagsDrawFilter.cpp', - '<(skia_src_path)/effects/SkPerlinNoiseShader.cpp', '<(skia_src_path)/effects/SkPixelXorXfermode.cpp', '<(skia_src_path)/effects/SkPorterDuff.cpp', '<(skia_src_path)/effects/SkRectShaderImageFilter.cpp', @@ -97,7 +96,6 @@ '<(skia_include_path)/effects/SkOffsetImageFilter.h', '<(skia_include_path)/effects/SkMorphologyImageFilter.h', '<(skia_include_path)/effects/SkPaintFlagsDrawFilter.h', - '<(skia_include_path)/effects/SkPerlinNoiseShader.h', '<(skia_include_path)/effects/SkPixelXorXfermode.h', '<(skia_include_path)/effects/SkPorterDuff.h', '<(skia_include_path)/effects/SkRectShaderImageFilter.h', diff --git a/gyp/gmslides.gypi b/gyp/gmslides.gypi index 2ea056c5b3..826bac894d 100644 --- a/gyp/gmslides.gypi +++ b/gyp/gmslides.gypi @@ -62,7 +62,6 @@ '../gm/pathfill.cpp', '../gm/pathinterior.cpp', '../gm/pathreverse.cpp', - '../gm/perlinnoise.cpp', '../gm/points.cpp', '../gm/poly2poly.cpp', '../gm/quadpaths.cpp', 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 diff --git a/src/effects/SkPerlinNoiseShader.cpp b/src/effects/SkPerlinNoiseShader.cpp deleted file mode 100644 index 66b1f982a6..0000000000 --- a/src/effects/SkPerlinNoiseShader.cpp +++ /dev/null @@ -1,998 +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. - */ - -#include "SkDither.h" -#include "SkPerlinNoiseShader.h" -#include "SkFlattenableBuffers.h" -#include "SkShader.h" -#include "SkUnPreMultiply.h" -#include "SkString.h" - -#if SK_SUPPORT_GPU -#include "GrContext.h" -#include "gl/GrGLEffect.h" -#include "gl/GrGLEffectMatrix.h" -#include "GrTBackendEffectFactory.h" -#include "SkGr.h" -#endif - -static const int kBlockSize = 256; -static const int kBlockMask = kBlockSize - 1; -static const int kPerlinNoise = 4096; -static const int kRandMaximum = SK_MaxS32; // 2**31 - 1 - -namespace { - -// noiseValue is the color component's value (or color) -// limitValue is the maximum perlin noise array index value allowed -// newValue is the current noise dimension (either width or height) -inline int checkNoise(int noiseValue, int limitValue, int newValue) { - // If the noise value would bring us out of bounds of the current noise array while we are - // stiching noise tiles together, wrap the noise around the current dimension of the noise to - // stay within the array bounds in a continuous fashion (so that tiling lines are not visible) - if (noiseValue >= limitValue) { - noiseValue -= newValue; - } - if (noiseValue >= limitValue - 1) { - noiseValue -= newValue - 1; - } - return noiseValue; -} - -inline SkScalar smoothCurve(SkScalar t) { - static const SkScalar SK_Scalar3 = SkFloatToScalar(3.0f); - - // returns t * t * (3 - 2 * t) - return SkScalarMul(SkScalarSquare(t), SK_Scalar3 - 2 * t); -} - -} // end namespace - -struct SkPerlinNoiseShader::StitchData { - StitchData() - : fWidth(0) - , fWrapX(0) - , fHeight(0) - , fWrapY(0) - {} - - bool operator==(const StitchData& other) const { - return fWidth == other.fWidth && - fWrapX == other.fWrapX && - fHeight == other.fHeight && - fWrapY == other.fWrapY; - } - - int fWidth; // How much to subtract to wrap for stitching. - int fWrapX; // Minimum value to wrap. - int fHeight; - int fWrapY; -}; - -struct SkPerlinNoiseShader::PaintingData { - PaintingData(int paintingSeed, const SkISize& tileSize) - : fSeed(paintingSeed) - , fTileSize(tileSize) - , fPermutationsBitmap(NULL) - , fNoiseBitmap(NULL) - {} - - ~PaintingData() - { - SkDELETE(fPermutationsBitmap); - SkDELETE(fNoiseBitmap); - } - - int fSeed; - uint8_t fLatticeSelector[kBlockSize]; - uint16_t fNoise[4][kBlockSize][2]; - SkPoint fGradient[4][kBlockSize]; - SkISize fTileSize; - SkVector fBaseFrequency; - StitchData fStitchDataInit; - -private: - - SkBitmap* fPermutationsBitmap; - SkBitmap* fNoiseBitmap; - -public: - - inline int random() { - static const int gRandAmplitude = 16807; // 7**5; primitive root of m - static const int gRandQ = 127773; // m / a - static const int gRandR = 2836; // m % a - - int result = gRandAmplitude * (fSeed % gRandQ) - gRandR * (fSeed / gRandQ); - if (result <= 0) - result += kRandMaximum; - fSeed = result; - return result; - } - - void init() - { - static const SkScalar gInvBlockSizef = SkScalarInvert(SkIntToScalar(kBlockSize)); - - // The seed value clamp to the range [1, kRandMaximum - 1]. - if (fSeed <= 0) { - fSeed = -(fSeed % (kRandMaximum - 1)) + 1; - } - if (fSeed > kRandMaximum - 1) { - fSeed = kRandMaximum - 1; - } - for (int channel = 0; channel < 4; ++channel) { - for (int i = 0; i < kBlockSize; ++i) { - fLatticeSelector[i] = i; - fNoise[channel][i][0] = (random() % (2 * kBlockSize)); - fNoise[channel][i][1] = (random() % (2 * kBlockSize)); - } - } - for (int i = kBlockSize - 1; i > 0; --i) { - int k = fLatticeSelector[i]; - int j = random() % kBlockSize; - SkASSERT(j >= 0); - SkASSERT(j < kBlockSize); - fLatticeSelector[i] = fLatticeSelector[j]; - fLatticeSelector[j] = k; - } - - // Perform the permutations now - { - // Copy noise data - uint16_t noise[4][kBlockSize][2]; - for (int i = 0; i < kBlockSize; ++i) { - for (int channel = 0; channel < 4; ++channel) { - for (int j = 0; j < 2; ++j) { - noise[channel][i][j] = fNoise[channel][i][j]; - } - } - } - // Do permutations on noise data - for (int i = 0; i < kBlockSize; ++i) { - for (int channel = 0; channel < 4; ++channel) { - for (int j = 0; j < 2; ++j) { - fNoise[channel][i][j] = noise[channel][fLatticeSelector[i]][j]; - } - } - } - } - - // Half of the largest possible value for 16 bit unsigned int - static const SkScalar halfMax16bits = SkFloatToScalar(32767.5f); - - // Compute gradients from permutated noise data - for (int channel = 0; channel < 4; ++channel) { - for (int i = 0; i < kBlockSize; ++i) { - fGradient[channel][i] = SkPoint::Make( - SkScalarMul(SkIntToScalar(fNoise[channel][i][0] - kBlockSize), - gInvBlockSizef), - SkScalarMul(SkIntToScalar(fNoise[channel][i][1] - kBlockSize), - gInvBlockSizef)); - fGradient[channel][i].normalize(); - // Put the normalized gradient back into the noise data - fNoise[channel][i][0] = SkScalarRoundToInt(SkScalarMul( - fGradient[channel][i].fX + SK_Scalar1, halfMax16bits)); - fNoise[channel][i][1] = SkScalarRoundToInt(SkScalarMul( - fGradient[channel][i].fY + SK_Scalar1, halfMax16bits)); - } - } - - // Invalidate bitmaps - SkDELETE(fPermutationsBitmap); - fPermutationsBitmap = NULL; - SkDELETE(fNoiseBitmap); - fNoiseBitmap = NULL; - } - - void stitch() { - SkScalar tileWidth = SkIntToScalar(fTileSize.width()); - SkScalar tileHeight = SkIntToScalar(fTileSize.height()); - SkASSERT(tileWidth > 0 && tileHeight > 0); - // When stitching tiled turbulence, the frequencies must be adjusted - // so that the tile borders will be continuous. - if (fBaseFrequency.fX) { - SkScalar lowFrequencx = SkScalarDiv( - SkScalarMulFloor(tileWidth, fBaseFrequency.fX), tileWidth); - SkScalar highFrequencx = SkScalarDiv( - SkScalarMulCeil(tileWidth, fBaseFrequency.fX), tileWidth); - // BaseFrequency should be non-negative according to the standard. - if (SkScalarDiv(fBaseFrequency.fX, lowFrequencx) < - SkScalarDiv(highFrequencx, fBaseFrequency.fX)) { - fBaseFrequency.fX = lowFrequencx; - } else { - fBaseFrequency.fX = highFrequencx; - } - } - if (fBaseFrequency.fY) { - SkScalar lowFrequency = SkScalarDiv( - SkScalarMulFloor(tileHeight, fBaseFrequency.fY), tileHeight); - SkScalar highFrequency = SkScalarDiv( - SkScalarMulCeil(tileHeight, fBaseFrequency.fY), tileHeight); - if (SkScalarDiv(fBaseFrequency.fY, lowFrequency) < - SkScalarDiv(highFrequency, fBaseFrequency.fY)) { - fBaseFrequency.fY = lowFrequency; - } else { - fBaseFrequency.fY = highFrequency; - } - } - // Set up TurbulenceInitial stitch values. - fStitchDataInit.fWidth = - SkScalarMulRound(tileWidth, fBaseFrequency.fX); - fStitchDataInit.fWrapX = kPerlinNoise + fStitchDataInit.fWidth; - fStitchDataInit.fHeight = - SkScalarMulRound(tileHeight, fBaseFrequency.fY); - fStitchDataInit.fWrapY = kPerlinNoise + fStitchDataInit.fHeight; - } - - SkBitmap* getPermutationsBitmap() - { - if (!fPermutationsBitmap) { - fPermutationsBitmap = SkNEW(SkBitmap); - fPermutationsBitmap->setConfig(SkBitmap::kA8_Config, kBlockSize, 1); - fPermutationsBitmap->allocPixels(); - uint8_t* bitmapPixels = fPermutationsBitmap->getAddr8(0, 0); - memcpy(bitmapPixels, fLatticeSelector, sizeof(uint8_t) * kBlockSize); - } - return fPermutationsBitmap; - } - - SkBitmap* getNoiseBitmap() - { - if (!fNoiseBitmap) { - fNoiseBitmap = SkNEW(SkBitmap); - fNoiseBitmap->setConfig(SkBitmap::kARGB_8888_Config, kBlockSize, 4); - fNoiseBitmap->allocPixels(); - uint32_t* bitmapPixels = fNoiseBitmap->getAddr32(0, 0); - memcpy(bitmapPixels, fNoise[0][0], sizeof(uint16_t) * kBlockSize * 4 * 2); - } - return fNoiseBitmap; - } -}; - -SkShader* SkPerlinNoiseShader::CreateFractalNoise(SkScalar baseFrequencyX, SkScalar baseFrequencyY, - int numOctaves, SkScalar seed, - const SkISize* tileSize) { - return SkNEW_ARGS(SkPerlinNoiseShader, (kFractalNoise_Type, baseFrequencyX, baseFrequencyY, - numOctaves, seed, tileSize)); -} - -SkShader* SkPerlinNoiseShader::CreateTubulence(SkScalar baseFrequencyX, SkScalar baseFrequencyY, - int numOctaves, SkScalar seed, - const SkISize* tileSize) { - return SkNEW_ARGS(SkPerlinNoiseShader, (kTurbulence_Type, baseFrequencyX, baseFrequencyY, - numOctaves, seed, tileSize)); -} - -SkPerlinNoiseShader::SkPerlinNoiseShader(SkPerlinNoiseShader::Type type, - SkScalar baseFrequencyX, - SkScalar baseFrequencyY, - int numOctaves, - SkScalar seed, - const SkISize* tileSize) - : fType(type) - , fBaseFrequencyX(baseFrequencyX) - , fBaseFrequencyY(baseFrequencyY) - , fNumOctaves(numOctaves) - , fSeed(seed) - , fStitchTiles((tileSize != NULL) && !tileSize->isEmpty()) - , fPaintingData(NULL) -{ - setTileSize(fStitchTiles ? *tileSize : SkISize::Make(0,0)); - fMatrix.reset(); -} - -SkPerlinNoiseShader::SkPerlinNoiseShader(SkFlattenableReadBuffer& buffer) : - INHERITED(buffer), fPaintingData(NULL) { - fType = (SkPerlinNoiseShader::Type) buffer.readInt(); - fBaseFrequencyX = buffer.readScalar(); - fBaseFrequencyY = buffer.readScalar(); - fNumOctaves = buffer.readInt(); - fSeed = buffer.readScalar(); - fStitchTiles = buffer.readBool(); - fTileSize.fWidth = buffer.readInt(); - fTileSize.fHeight = buffer.readInt(); - setTileSize(fTileSize); - fMatrix.reset(); -} - -SkPerlinNoiseShader::~SkPerlinNoiseShader() { - // Safety, should have been done in endContext() - SkDELETE(fPaintingData); -} - -void SkPerlinNoiseShader::flatten(SkFlattenableWriteBuffer& buffer) const { - this->INHERITED::flatten(buffer); - buffer.writeInt((int) fType); - buffer.writeScalar(fBaseFrequencyX); - buffer.writeScalar(fBaseFrequencyY); - buffer.writeInt(fNumOctaves); - buffer.writeScalar(fSeed); - buffer.writeBool(fStitchTiles); - buffer.writeInt(fTileSize.fWidth); - buffer.writeInt(fTileSize.fHeight); -} - -void SkPerlinNoiseShader::initPaint(PaintingData& paintingData) -{ - paintingData.init(); - - // Set frequencies to original values - paintingData.fBaseFrequency.set(fBaseFrequencyX, fBaseFrequencyY); - // Adjust frequecies based on size if stitching is enabled - if (fStitchTiles) { - paintingData.stitch(); - } -} - -void SkPerlinNoiseShader::setTileSize(const SkISize& tileSize) { - fTileSize = tileSize; - - if (NULL == fPaintingData) { - fPaintingData = SkNEW_ARGS(PaintingData, (SkScalarRoundToInt(fSeed), fTileSize)); - initPaint(*fPaintingData); - } else { - // Set Size - fPaintingData->fTileSize = fTileSize; - // Set frequencies to original values - fPaintingData->fBaseFrequency.set(fBaseFrequencyX, fBaseFrequencyY); - // Adjust frequecies based on size if stitching is enabled - if (fStitchTiles) { - fPaintingData->stitch(); - } - } -} - -SkScalar SkPerlinNoiseShader::noise2D(int channel, const PaintingData& paintingData, - const StitchData& stitchData, const SkPoint& noiseVector) -{ - struct Noise { - int noisePositionIntegerValue; - SkScalar noisePositionFractionValue; - Noise(SkScalar component) - { - SkScalar position = component + kPerlinNoise; - noisePositionIntegerValue = SkScalarFloorToInt(position); - noisePositionFractionValue = position - SkIntToScalar(noisePositionIntegerValue); - } - }; - Noise noiseX(noiseVector.x()); - Noise noiseY(noiseVector.y()); - SkScalar u, v; - // If stitching, adjust lattice points accordingly. - if (fStitchTiles) { - noiseX.noisePositionIntegerValue = - checkNoise(noiseX.noisePositionIntegerValue, stitchData.fWrapX, stitchData.fWidth); - noiseY.noisePositionIntegerValue = - checkNoise(noiseY.noisePositionIntegerValue, stitchData.fWrapY, stitchData.fHeight); - } - noiseX.noisePositionIntegerValue &= kBlockMask; - noiseY.noisePositionIntegerValue &= kBlockMask; - int latticeIndex = - paintingData.fLatticeSelector[noiseX.noisePositionIntegerValue] + - noiseY.noisePositionIntegerValue; - int nextLatticeIndex = - paintingData.fLatticeSelector[(noiseX.noisePositionIntegerValue + 1) & kBlockMask] + - noiseY.noisePositionIntegerValue; - SkScalar sx = smoothCurve(noiseX.noisePositionFractionValue); - SkScalar sy = smoothCurve(noiseY.noisePositionFractionValue); - // This is taken 1:1 from SVG spec: http://www.w3.org/TR/SVG11/filters.html#feTurbulenceElement - SkPoint fractionValue = SkPoint::Make(noiseX.noisePositionFractionValue, - noiseY.noisePositionFractionValue); // Offset (0,0) - u = paintingData.fGradient[channel][latticeIndex & kBlockMask].dot(fractionValue); - fractionValue.fX -= SK_Scalar1; // Offset (-1,0) - v = paintingData.fGradient[channel][nextLatticeIndex & kBlockMask].dot(fractionValue); - SkScalar a = SkScalarInterp(u, v, sx); - fractionValue.fY -= SK_Scalar1; // Offset (-1,-1) - v = paintingData.fGradient[channel][(nextLatticeIndex + 1) & kBlockMask].dot(fractionValue); - fractionValue.fX = noiseX.noisePositionFractionValue; // Offset (0,-1) - u = paintingData.fGradient[channel][(latticeIndex + 1) & kBlockMask].dot(fractionValue); - SkScalar b = SkScalarInterp(u, v, sx); - return SkScalarInterp(a, b, sy); -} - -SkScalar SkPerlinNoiseShader::calculateTurbulenceValueForPoint( - int channel, const PaintingData& paintingData, StitchData& stitchData, const SkPoint& point) -{ - if (fStitchTiles) { - // Set up TurbulenceInitial stitch values. - stitchData = paintingData.fStitchDataInit; - } - SkScalar turbulenceFunctionResult = 0; - SkPoint noiseVector(SkPoint::Make(SkScalarMul(point.x(), paintingData.fBaseFrequency.fX), - SkScalarMul(point.y(), paintingData.fBaseFrequency.fY))); - SkScalar ratio = SK_Scalar1; - for (int octave = 0; octave < fNumOctaves; ++octave) { - SkScalar noise = noise2D(channel, paintingData, stitchData, noiseVector); - turbulenceFunctionResult += SkScalarDiv( - (fType == kFractalNoise_Type) ? noise : SkScalarAbs(noise), ratio); - noiseVector.fX *= 2; - noiseVector.fY *= 2; - ratio *= 2; - if (fStitchTiles) { - // Update stitch values - stitchData.fWidth *= 2; - stitchData.fWrapX = stitchData.fWidth + kPerlinNoise; - stitchData.fHeight *= 2; - stitchData.fWrapY = stitchData.fHeight + kPerlinNoise; - } - } - - // The value of turbulenceFunctionResult comes from ((turbulenceFunctionResult) + 1) / 2 - // by fractalNoise and (turbulenceFunctionResult) by turbulence. - if (fType == kFractalNoise_Type) { - turbulenceFunctionResult = - SkScalarMul(turbulenceFunctionResult, SK_ScalarHalf) + SK_ScalarHalf; - } - - if (channel == 3) { // Scale alpha by paint value - turbulenceFunctionResult = SkScalarMul(turbulenceFunctionResult, - SkScalarDiv(SkIntToScalar(getPaintAlpha()), SkIntToScalar(255))); - } - - // Clamp result - return SkScalarPin(turbulenceFunctionResult, 0, SK_Scalar1); -} - -SkPMColor SkPerlinNoiseShader::shade(const SkPoint& point, StitchData& stitchData) { - SkMatrix matrix = fMatrix; - SkMatrix invMatrix; - if (!matrix.invert(&invMatrix)) { - invMatrix.reset(); - } else { - invMatrix.postConcat(invMatrix); // Square the matrix - } - // This (1,1) translation is due to WebKit's 1 based coordinates for the noise - // (as opposed to 0 based, usually). The same adjustment is in the setData() function. - matrix.postTranslate(SK_Scalar1, SK_Scalar1); - SkPoint newPoint; - matrix.mapPoints(&newPoint, &point, 1); - invMatrix.mapPoints(&newPoint, &newPoint, 1); - newPoint.fX = SkScalarRoundToScalar(newPoint.fX); - newPoint.fY = SkScalarRoundToScalar(newPoint.fY); - - U8CPU rgba[4]; - for (int channel = 3; channel >= 0; --channel) { - rgba[channel] = SkScalarFloorToInt(255 * - calculateTurbulenceValueForPoint(channel, *fPaintingData, stitchData, newPoint)); - } - return SkPreMultiplyARGB(rgba[3], rgba[0], rgba[1], rgba[2]); -} - -bool SkPerlinNoiseShader::setContext(const SkBitmap& device, const SkPaint& paint, - const SkMatrix& matrix) { - fMatrix = matrix; - return INHERITED::setContext(device, paint, matrix); -} - -void SkPerlinNoiseShader::shadeSpan(int x, int y, SkPMColor result[], int count) { - SkPoint point = SkPoint::Make(SkIntToScalar(x), SkIntToScalar(y)); - StitchData stitchData; - for (int i = 0; i < count; ++i) { - result[i] = shade(point, stitchData); - point.fX += SK_Scalar1; - } -} - -void SkPerlinNoiseShader::shadeSpan16(int x, int y, uint16_t result[], int count) { - SkPoint point = SkPoint::Make(SkIntToScalar(x), SkIntToScalar(y)); - StitchData stitchData; - DITHER_565_SCAN(y); - for (int i = 0; i < count; ++i) { - unsigned dither = DITHER_VALUE(x); - result[i] = SkDitherRGB32To565(shade(point, stitchData), dither); - DITHER_INC_X(x); - point.fX += SK_Scalar1; - } -} - -///////////////////////////////////////////////////////////////////// - -#if SK_SUPPORT_GPU - -#include "GrTBackendEffectFactory.h" - -class GrGLPerlinNoise : public GrGLEffect { -public: - - GrGLPerlinNoise(const GrBackendEffectFactory& factory, - const GrDrawEffect& drawEffect); - virtual ~GrGLPerlinNoise() { } - - virtual void emitCode(GrGLShaderBuilder*, - const GrDrawEffect&, - EffectKey, - const char* outputColor, - const char* inputColor, - const TextureSamplerArray&) SK_OVERRIDE; - - static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&); - - virtual void setData(const GrGLUniformManager&, const GrDrawEffect&); - -private: - SkPerlinNoiseShader::Type fType; - bool fStitchTiles; - GrGLUniformManager::UniformHandle fBaseFrequencyUni; - GrGLUniformManager::UniformHandle fNumOctavesUni; - GrGLUniformManager::UniformHandle fStitchDataUni; - GrGLUniformManager::UniformHandle fAlphaUni; - GrGLUniformManager::UniformHandle fInvMatrixUni; - GrGLEffectMatrix fEffectMatrix; - - typedef GrGLEffect INHERITED; -}; - -///////////////////////////////////////////////////////////////////// - -class GrPerlinNoiseEffect : public GrEffect { -public: - static GrEffectRef* Create(SkPerlinNoiseShader::Type type, const SkVector& baseFrequency, - SkScalar numOctaves, bool stitchTiles, - const SkPerlinNoiseShader::StitchData& stitchData, - GrTexture* permutationsTexture, GrTexture* noiseTexture, - const SkMatrix& matrix, uint8_t alpha) { - AutoEffectUnref effect(SkNEW_ARGS(GrPerlinNoiseEffect, (type, baseFrequency, numOctaves, - stitchTiles, stitchData, permutationsTexture, noiseTexture, matrix, alpha))); - return CreateEffectRef(effect); - } - - virtual ~GrPerlinNoiseEffect() { } - - static const char* Name() { return "PerlinNoise"; } - virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE { - return GrTBackendEffectFactory<GrPerlinNoiseEffect>::getInstance(); - } - SkPerlinNoiseShader::Type type() const { return fType; } - bool stitchTiles() const { return fStitchTiles; } - const SkVector& baseFrequency() const { return fBaseFrequency; } - SkScalar numOctaves() const { return fNumOctaves; } - const SkPerlinNoiseShader::StitchData& stitchData() const { return fStitchData; } - const SkMatrix& matrix() const { return fMatrix; } - uint8_t alpha() const { return fAlpha; } - GrGLEffectMatrix::CoordsType coordsType() const { return GrEffect::kLocal_CoordsType; } - - typedef GrGLPerlinNoise GLEffect; - - void getConstantColorComponents(GrColor*, uint32_t* validFlags) const SK_OVERRIDE { - *validFlags = 0; // This is noise. Nothing is constant. - } - -private: - virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE { - const GrPerlinNoiseEffect& s = CastEffect<GrPerlinNoiseEffect>(sBase); - return fPermutationsAccess.getTexture() == s.fPermutationsAccess.getTexture() && - fNoiseAccess.getTexture() == s.fNoiseAccess.getTexture() && - fType == s.fType && - fBaseFrequency == s.fBaseFrequency && - fStitchTiles == s.fStitchTiles && - fStitchData == s.fStitchData && - fMatrix == s.fMatrix && - fAlpha == s.fAlpha; - } - - GrPerlinNoiseEffect(SkPerlinNoiseShader::Type type, const SkVector& baseFrequency, - SkScalar numOctaves, bool stitchTiles, - const SkPerlinNoiseShader::StitchData& stitchData, - GrTexture* permutationsTexture, GrTexture* noiseTexture, - const SkMatrix& matrix, uint8_t alpha) - : fPermutationsAccess(permutationsTexture) - , fNoiseAccess(noiseTexture) - , fType(type) - , fBaseFrequency(baseFrequency) - , fNumOctaves(numOctaves) - , fStitchTiles(stitchTiles) - , fStitchData(stitchData) - , fMatrix(matrix) - , fAlpha(alpha) - { - this->addTextureAccess(&fPermutationsAccess); - this->addTextureAccess(&fNoiseAccess); - } - - GR_DECLARE_EFFECT_TEST; - - GrTextureAccess fPermutationsAccess; - GrTextureAccess fNoiseAccess; - SkPerlinNoiseShader::Type fType; - SkVector fBaseFrequency; - SkScalar fNumOctaves; - bool fStitchTiles; - SkPerlinNoiseShader::StitchData fStitchData; - SkMatrix fMatrix; - uint8_t fAlpha; - - typedef GrEffect INHERITED; -}; - -///////////////////////////////////////////////////////////////////// - -GR_DEFINE_EFFECT_TEST(GrPerlinNoiseEffect); - -GrEffectRef* GrPerlinNoiseEffect::TestCreate(SkMWCRandom* random, - GrContext* context, - GrTexture**) { - int numOctaves = random->nextRangeU(2, 10); - bool stitchTiles = random->nextBool(); - SkScalar seed = SkIntToScalar(random->nextU()); - SkISize tileSize = SkISize::Make(random->nextRangeU(4, 4096), random->nextRangeU(4, 4096)); - SkScalar baseFrequencyX = random->nextRangeScalar(SkFloatToScalar(0.01f), - SkFloatToScalar(0.99f)); - SkScalar baseFrequencyY = random->nextRangeScalar(SkFloatToScalar(0.01f), - SkFloatToScalar(0.99f)); - - SkShader* shader = random->nextBool() ? - SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves, seed, - stitchTiles ? &tileSize : NULL) : - SkPerlinNoiseShader::CreateTubulence(baseFrequencyX, baseFrequencyY, numOctaves, seed, - stitchTiles ? &tileSize : NULL); - - SkPaint paint; - GrEffectRef* effect = shader->asNewEffect(context, paint); - - SkDELETE(shader); - - return effect; -} - -///////////////////////////////////////////////////////////////////// - -void GrGLPerlinNoise::emitCode(GrGLShaderBuilder* builder, - const GrDrawEffect&, - EffectKey key, - const char* outputColor, - const char* inputColor, - const TextureSamplerArray& samplers) { - sk_ignore_unused_variable(inputColor); - - const char* vCoords; - fEffectMatrix.emitCodeMakeFSCoords2D(builder, key, &vCoords); - - fInvMatrixUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, - kMat33f_GrSLType, "invMatrix"); - const char* invMatrixUni = builder->getUniformCStr(fInvMatrixUni); - fBaseFrequencyUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, - kVec2f_GrSLType, "baseFrequency"); - const char* baseFrequencyUni = builder->getUniformCStr(fBaseFrequencyUni); - fNumOctavesUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, - kFloat_GrSLType, "numOctaves"); - const char* numOctavesUni = builder->getUniformCStr(fNumOctavesUni); - fAlphaUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, - kFloat_GrSLType, "alpha"); - const char* alphaUni = builder->getUniformCStr(fAlphaUni); - - const char* stitchDataUni = NULL; - if (fStitchTiles) { - fStitchDataUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, - kVec4f_GrSLType, "stitchData"); - stitchDataUni = builder->getUniformCStr(fStitchDataUni); - } - - const char* chanCoords = "chanCoords"; - const char* stitchData = "stitchData"; - const char* ratio = "ratio"; - const char* noise = "noise"; - const char* noiseXY = "noiseXY"; - const char* noiseVec = "noiseVec"; - const char* noiseVecIni = "noiseVecIni"; - const char* noiseSmooth = "noiseSmooth"; - const char* fractVal = "fractVal"; - const char* uv = "uv"; - const char* ab = "ab"; - const char* latticeIdx = "latticeIdx"; - const char* lattice = "lattice"; - const char* perlinNoise = "4096.0"; - const char* inc8bit = "0.00390625"; // 1.0 / 256.0 - // This is the math to convert the two 16bit integer packed into rgba 8 bit input into a - // [-1,1] vector and perform a dot product between that vector and the provided vector. - const char* dotLattice = "dot(((%s.ga + %s.rb * vec2(%s)) * vec2(2.0) - vec2(1.0)), %s);"; - - // There are 4 lines, so the center of each line is 1/8, 3/8, 5/8 and 7/8 - builder->fsCodeAppendf("\t\tconst vec4 %s = vec4(0.125, 0.375, 0.625, 0.875);", chanCoords); - - // There are rounding errors if the floor operation is not performed here - builder->fsCodeAppendf("\t\tvec2 %s = floor((%s*vec3(%s, 1.0)).xy) * %s;", - noiseVecIni, invMatrixUni, vCoords, baseFrequencyUni); - - // Loop over the 4 channels - builder->fsCodeAppend("\t\tfor (int channel = 3; channel >= 0; --channel) {"); - - if (fStitchTiles) { - // Set up TurbulenceInitial stitch values. - builder->fsCodeAppendf("\t\tvec4 %s = %s;", stitchData, stitchDataUni); - } - - builder->fsCodeAppendf("\t\t%s[channel] = 0.0;", outputColor); - - builder->fsCodeAppendf("\t\tfloat %s = 1.0;", ratio); - builder->fsCodeAppendf("\t\tvec2 %s = %s;", noiseVec, noiseVecIni); - - // Loop over all octaves - builder->fsCodeAppendf("\t\tfor (int octave = 0; octave < %s; ++octave) {", numOctavesUni); - - builder->fsCodeAppendf("\t\tvec4 %s = vec4(floor(%s) + vec2(%s), fract(%s));", - noiseXY, noiseVec, perlinNoise, noiseVec); - - // smooth curve : t * t * (3 - 2 * t) - builder->fsCodeAppendf("\t\tvec2 %s = %s.zw * %s.zw * (vec2(3.0) - vec2(2.0) * %s.zw);", - noiseSmooth, noiseXY, noiseXY, noiseXY); - - // Adjust frequencies if we're stitching tiles - if (fStitchTiles) { - builder->fsCodeAppendf("\t\tif(%s.x >= %s.y) { %s.x -= %s.x; }", - noiseXY, stitchData, noiseXY, stitchData); - builder->fsCodeAppendf("\t\tif(%s.x >= (%s.y - 1.0)) { %s.x -= (%s.x - 1.0); }", - noiseXY, stitchData, noiseXY, stitchData); - builder->fsCodeAppendf("\t\tif(%s.y >= %s.w) { %s.y -= %s.z; }", - noiseXY, stitchData, noiseXY, stitchData); - builder->fsCodeAppendf("\t\tif(%s.y >= (%s.w - 1.0)) { %s.y -= (%s.z - 1.0); }", - noiseXY, stitchData, noiseXY, stitchData); - } - - // Get texture coordinates and normalize - builder->fsCodeAppendf("\t\t%s.xy = fract(floor(mod(%s.xy, 256.0)) / vec2(256.0));", - noiseXY, noiseXY); - - // Get permutation for x - { - SkString xCoords(""); - xCoords.appendf("vec2(%s.x, 0.5)", noiseXY); - - builder->fsCodeAppendf("\t\tvec2 %s;\t\t%s.x = ", latticeIdx, latticeIdx); - builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, - samplers[0], xCoords.c_str(), kVec2f_GrSLType); - builder->fsCodeAppend(".r;\n"); - } - - // Get permutation for x + 1 - { - SkString xCoords(""); - xCoords.appendf("vec2(fract(%s.x + %s), 0.5)", noiseXY, inc8bit); - - builder->fsCodeAppendf("\t\t%s.y = ", latticeIdx); - builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, - samplers[0], xCoords.c_str(), kVec2f_GrSLType); - builder->fsCodeAppend(".r;\n"); - } - - // Get (x,y) coordinates with the permutated x - builder->fsCodeAppendf("\t\t%s = fract(%s + %s.yy);", latticeIdx, latticeIdx, noiseXY); - - builder->fsCodeAppendf("\t\tvec2 %s = %s.zw;", fractVal, noiseXY); - - builder->fsCodeAppendf("\t\tvec2 %s;", uv); - // Compute u, at offset (0,0) - { - SkString latticeCoords(""); - latticeCoords.appendf("vec2(%s.x, %s[channel])", latticeIdx, chanCoords); - builder->fsCodeAppendf("vec4 %s = ", lattice); - builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, - samplers[1], latticeCoords.c_str(), kVec2f_GrSLType); - builder->fsCodeAppendf(".bgra;\n\t\t%s.x = ", uv); - builder->fsCodeAppendf(dotLattice, lattice, lattice, inc8bit, fractVal); - } - - builder->fsCodeAppendf("\t\t%s.x -= 1.0;", fractVal); - // Compute v, at offset (-1,0) - { - SkString latticeCoords(""); - latticeCoords.appendf("vec2(%s.y, %s[channel])", latticeIdx, chanCoords); - builder->fsCodeAppend("lattice = "); - builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, - samplers[1], latticeCoords.c_str(), kVec2f_GrSLType); - builder->fsCodeAppendf(".bgra;\n\t\t%s.y = ", uv); - builder->fsCodeAppendf(dotLattice, lattice, lattice, inc8bit, fractVal); - } - - // Compute 'a' as a linear interpolation of 'u' and 'v' - builder->fsCodeAppendf("\t\tvec2 %s;", ab); - builder->fsCodeAppendf("\t\t%s.x = mix(%s.x, %s.y, %s.x);", ab, uv, uv, noiseSmooth); - - builder->fsCodeAppendf("\t\t%s.y -= 1.0;", fractVal); - // Compute v, at offset (-1,-1) - { - SkString latticeCoords(""); - latticeCoords.appendf("vec2(fract(%s.y + %s), %s[channel])", - latticeIdx, inc8bit, chanCoords); - builder->fsCodeAppend("lattice = "); - builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, - samplers[1], latticeCoords.c_str(), kVec2f_GrSLType); - builder->fsCodeAppendf(".bgra;\n\t\t%s.y = ", uv); - builder->fsCodeAppendf(dotLattice, lattice, lattice, inc8bit, fractVal); - } - - builder->fsCodeAppendf("\t\t%s.x += 1.0;", fractVal); - // Compute u, at offset (0,-1) - { - SkString latticeCoords(""); - latticeCoords.appendf("vec2(fract(%s.x + %s), %s[channel])", - latticeIdx, inc8bit, chanCoords); - builder->fsCodeAppend("lattice = "); - builder->appendTextureLookup(GrGLShaderBuilder::kFragment_ShaderType, - samplers[1], latticeCoords.c_str(), kVec2f_GrSLType); - builder->fsCodeAppendf(".bgra;\n\t\t%s.x = ", uv); - builder->fsCodeAppendf(dotLattice, lattice, lattice, inc8bit, fractVal); - } - - // Compute 'b' as a linear interpolation of 'u' and 'v' - builder->fsCodeAppendf("\t\t%s.y = mix(%s.x, %s.y, %s.x);", ab, uv, uv, noiseSmooth); - // Compute the noise as a linear interpolation of 'a' and 'b' - builder->fsCodeAppendf("\t\tfloat %s = mix(%s.x, %s.y, %s.y);", noise, ab, ab, noiseSmooth); - - builder->fsCodeAppendf("\t\t%s[channel] += ", outputColor); - builder->fsCodeAppendf((fType == SkPerlinNoiseShader::kFractalNoise_Type) ? - "%s / %s;" : "abs(%s) / %s;", noise, ratio); - - builder->fsCodeAppendf("\t\t%s *= vec2(2.0);", noiseVec); - builder->fsCodeAppendf("\t\t%s *= 2.0;", ratio); - - if (fStitchTiles) { - builder->fsCodeAppendf("\t\t%s.xz *= vec2(2.0);", stitchData); - builder->fsCodeAppendf("\t\t%s.yw = %s.xz + vec2(%s);", stitchData, stitchData, perlinNoise); - } - builder->fsCodeAppend("\t\t}"); // end of the for loop on octaves - - builder->fsCodeAppend("\t\t}"); // end of the for loop on channels - - if (fType == SkPerlinNoiseShader::kFractalNoise_Type) { - // The value of turbulenceFunctionResult comes from ((turbulenceFunctionResult) + 1) / 2 - // by fractalNoise and (turbulenceFunctionResult) by turbulence. - builder->fsCodeAppendf("\t\t%s = %s * vec4(0.5) + vec4(0.5);", outputColor, outputColor); - } - - builder->fsCodeAppendf("\t\t%s.a *= %s;", outputColor, alphaUni); - - // Clamp values - builder->fsCodeAppendf("\t\t%s = clamp(%s, 0.0, 1.0);", outputColor, outputColor); - - // Pre-multiply the result - builder->fsCodeAppendf("\t\t%s = vec4(%s.rgb * %s.aaa, %s.a);\n", - outputColor, outputColor, outputColor, outputColor); -} - -GrGLPerlinNoise::GrGLPerlinNoise(const GrBackendEffectFactory& factory, - const GrDrawEffect& drawEffect) - : INHERITED (factory) - , fType(drawEffect.castEffect<GrPerlinNoiseEffect>().type()) - , fStitchTiles(drawEffect.castEffect<GrPerlinNoiseEffect>().stitchTiles()) - , fEffectMatrix(drawEffect.castEffect<GrPerlinNoiseEffect>().coordsType()) { -} - -GrGLEffect::EffectKey GrGLPerlinNoise::GenKey(const GrDrawEffect& drawEffect, const GrGLCaps&) { - const GrPerlinNoiseEffect& turbulence = drawEffect.castEffect<GrPerlinNoiseEffect>(); - - EffectKey key = 0; - - switch (turbulence.type()) { - case SkPerlinNoiseShader::kFractalNoise_Type: - key = 0x1; - break; - case SkPerlinNoiseShader::kTurbulence_Type: - key = 0x2; - break; - default: - // leave key at 0 - break; - } - - if (turbulence.stitchTiles()) { - key |= 0x4; // Flip the 3rd bit if tile stitching is on - } - - key = key << GrGLEffectMatrix::kKeyBits; - - SkMatrix m = turbulence.matrix(); - m.postTranslate(SK_Scalar1, SK_Scalar1); - return key | GrGLEffectMatrix::GenKey(m, drawEffect, - drawEffect.castEffect<GrPerlinNoiseEffect>().coordsType(), NULL); -} - -void GrGLPerlinNoise::setData(const GrGLUniformManager& uman, const GrDrawEffect& drawEffect) { - const GrPerlinNoiseEffect& turbulence = drawEffect.castEffect<GrPerlinNoiseEffect>(); - - const SkVector& baseFrequency = turbulence.baseFrequency(); - uman.set2f(fBaseFrequencyUni, baseFrequency.fX, baseFrequency.fY); - uman.set1f(fNumOctavesUni, turbulence.numOctaves()); - if (turbulence.stitchTiles()) { - const SkPerlinNoiseShader::StitchData& stitchData = turbulence.stitchData(); - uman.set4f(fStitchDataUni, SkIntToScalar(stitchData.fWidth), - SkIntToScalar(stitchData.fWrapX), - SkIntToScalar(stitchData.fHeight), - SkIntToScalar(stitchData.fWrapY)); - } - - uman.set1f(fAlphaUni, SkScalarDiv(SkIntToScalar(turbulence.alpha()), SkIntToScalar(255))); - - SkMatrix m = turbulence.matrix(); - SkMatrix invM; - if (!m.invert(&invM)) { - invM.reset(); - } else { - invM.postConcat(invM); // Square the matrix - } - uman.setSkMatrix(fInvMatrixUni, invM); - - // This (1,1) translation is due to WebKit's 1 based coordinates for the noise - // (as opposed to 0 based, usually). The same adjustment is in the shadeSpan() functions. - m.postTranslate(SK_Scalar1, SK_Scalar1); - fEffectMatrix.setData(uman, m, drawEffect, NULL); -} - -///////////////////////////////////////////////////////////////////// - -GrEffectRef* SkPerlinNoiseShader::asNewEffect(GrContext* context, const SkPaint& paint) const { - SkASSERT(NULL != context); - - // Either we don't stitch tiles, either we have a valid tile size - SkASSERT(!fStitchTiles || !fTileSize.isEmpty()); - - GrTexture* permutationsTexture = GrLockAndRefCachedBitmapTexture( - context, *fPaintingData->getPermutationsBitmap(), NULL); - GrTexture* noiseTexture = GrLockAndRefCachedBitmapTexture( - context, *fPaintingData->getNoiseBitmap(), NULL); - - GrEffectRef* effect = (NULL != permutationsTexture) && (NULL != noiseTexture) ? - GrPerlinNoiseEffect::Create(fType, fPaintingData->fBaseFrequency, fNumOctaves, - fStitchTiles, fPaintingData->fStitchDataInit, - permutationsTexture, noiseTexture, - this->getLocalMatrix(), paint.getAlpha()) : - NULL; - - // Unlock immediately, this is not great, but we don't have a way of - // knowing when else to unlock it currently. TODO: Remove this when - // unref becomes the unlock replacement for all types of textures. - if (NULL != permutationsTexture) { - GrUnlockAndUnrefCachedBitmapTexture(permutationsTexture); - } - if (NULL != noiseTexture) { - GrUnlockAndUnrefCachedBitmapTexture(noiseTexture); - } - - return effect; -} - -#else - -GrEffectRef* SkPerlinNoiseShader::asNewEffect(GrContext*, const SkPaint&) const { - SkDEBUGFAIL("Should not call in GPU-less build"); - return NULL; -} - -#endif - -#ifdef SK_DEVELOPER -void SkPerlinNoiseShader::toString(SkString* str) const { - str->append("SkPerlinNoiseShader: ("); - - str->append("type: "); - switch (fType) { - case kFractalNoise_Type: - str->append("\"fractal noise\""); - break; - case kTurbulence_Type: - str->append("\"turbulence\""); - break; - default: - str->append("\"unknown\""); - break; - } - str->append(" base frequency: ("); - str->appendScalar(fBaseFrequencyX); - str->append(", "); - str->appendScalar(fBaseFrequencyY); - str->append(") number of octaves: "); - str->appendS32(fNumOctaves); - str->append(" seed: "); - str->appendScalar(fSeed); - str->append(" stitch tiles: "); - str->append(fStitchTiles ? "true " : "false "); - - this->INHERITED::toString(str); - - str->append(")"); -} -#endif |