senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2012 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "SkMatrixConvolutionImageFilter.h" |
| 9 | #include "SkBitmap.h" |
| 10 | #include "SkColorPriv.h" |
| 11 | #include "SkFlattenableBuffers.h" |
| 12 | #include "SkRect.h" |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 13 | #include "SkUnPreMultiply.h" |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 14 | |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 15 | #if SK_SUPPORT_GPU |
bsalomon@google.com | d698f77 | 2012-10-25 13:22:00 +0000 | [diff] [blame^] | 16 | #include "gl/GrGLEffect.h" |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 17 | #endif |
| 18 | |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 19 | SkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter(const SkISize& kernelSize, const SkScalar* kernel, SkScalar gain, SkScalar bias, const SkIPoint& target, TileMode tileMode, bool convolveAlpha, SkImageFilter* input) |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 20 | : INHERITED(input), |
| 21 | fKernelSize(kernelSize), |
| 22 | fGain(gain), |
| 23 | fBias(bias), |
| 24 | fTarget(target), |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 25 | fTileMode(tileMode), |
| 26 | fConvolveAlpha(convolveAlpha) { |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 27 | uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; |
| 28 | fKernel = SkNEW_ARRAY(SkScalar, size); |
| 29 | memcpy(fKernel, kernel, size * sizeof(SkScalar)); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 30 | SkASSERT(kernelSize.fWidth >= 1 && kernelSize.fHeight >= 1); |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 31 | SkASSERT(target.fX >= 0 && target.fX < kernelSize.fWidth); |
| 32 | SkASSERT(target.fY >= 0 && target.fY < kernelSize.fHeight); |
| 33 | } |
| 34 | |
| 35 | SkMatrixConvolutionImageFilter::SkMatrixConvolutionImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) { |
| 36 | fKernelSize.fWidth = buffer.readInt(); |
| 37 | fKernelSize.fHeight = buffer.readInt(); |
| 38 | uint32_t size = fKernelSize.fWidth * fKernelSize.fHeight; |
| 39 | fKernel = SkNEW_ARRAY(SkScalar, size); |
| 40 | uint32_t readSize = buffer.readScalarArray(fKernel); |
| 41 | SkASSERT(readSize == size); |
| 42 | fGain = buffer.readScalar(); |
| 43 | fBias = buffer.readScalar(); |
| 44 | fTarget.fX = buffer.readScalar(); |
| 45 | fTarget.fY = buffer.readScalar(); |
| 46 | fTileMode = (TileMode) buffer.readInt(); |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 47 | fConvolveAlpha = buffer.readBool(); |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 48 | } |
| 49 | |
| 50 | void SkMatrixConvolutionImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const { |
| 51 | this->INHERITED::flatten(buffer); |
| 52 | buffer.writeInt(fKernelSize.fWidth); |
| 53 | buffer.writeInt(fKernelSize.fHeight); |
| 54 | buffer.writeScalarArray(fKernel, fKernelSize.fWidth * fKernelSize.fHeight); |
| 55 | buffer.writeScalar(fGain); |
| 56 | buffer.writeScalar(fBias); |
| 57 | buffer.writeScalar(fTarget.fX); |
| 58 | buffer.writeScalar(fTarget.fY); |
| 59 | buffer.writeInt((int) fTileMode); |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 60 | buffer.writeBool(fConvolveAlpha); |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | SkMatrixConvolutionImageFilter::~SkMatrixConvolutionImageFilter() { |
| 64 | delete[] fKernel; |
| 65 | } |
| 66 | |
| 67 | class UncheckedPixelFetcher { |
| 68 | public: |
| 69 | static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { |
| 70 | return *src.getAddr32(x, y); |
| 71 | } |
| 72 | }; |
| 73 | |
| 74 | class ClampPixelFetcher { |
| 75 | public: |
| 76 | static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { |
| 77 | x = SkClampMax(x, src.width() - 1); |
| 78 | y = SkClampMax(y, src.height() - 1); |
| 79 | return *src.getAddr32(x, y); |
| 80 | } |
| 81 | }; |
| 82 | |
| 83 | class RepeatPixelFetcher { |
| 84 | public: |
| 85 | static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { |
| 86 | x %= src.width(); |
| 87 | y %= src.height(); |
| 88 | if (x < 0) { |
| 89 | x += src.width(); |
| 90 | } |
| 91 | if (y < 0) { |
| 92 | y += src.height(); |
| 93 | } |
| 94 | return *src.getAddr32(x, y); |
| 95 | } |
| 96 | }; |
| 97 | |
| 98 | class ClampToBlackPixelFetcher { |
| 99 | public: |
| 100 | static inline SkPMColor fetch(const SkBitmap& src, int x, int y) { |
| 101 | if (x < 0 || x >= src.width() || y < 0 || y >= src.height()) { |
| 102 | return 0; |
| 103 | } else { |
| 104 | return *src.getAddr32(x, y); |
| 105 | } |
| 106 | } |
| 107 | }; |
| 108 | |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 109 | template<class PixelFetcher, bool convolveAlpha> |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 110 | void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { |
| 111 | for (int y = rect.fTop; y < rect.fBottom; ++y) { |
| 112 | SkPMColor* dptr = result->getAddr32(rect.fLeft, y); |
| 113 | for (int x = rect.fLeft; x < rect.fRight; ++x) { |
| 114 | SkScalar sumA = 0, sumR = 0, sumG = 0, sumB = 0; |
| 115 | for (int cy = 0; cy < fKernelSize.fHeight; cy++) { |
| 116 | for (int cx = 0; cx < fKernelSize.fWidth; cx++) { |
| 117 | SkPMColor s = PixelFetcher::fetch(src, x + cx - fTarget.fX, y + cy - fTarget.fY); |
| 118 | SkScalar k = fKernel[cy * fKernelSize.fWidth + cx]; |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 119 | if (convolveAlpha) { |
| 120 | sumA += SkScalarMul(SkIntToScalar(SkGetPackedA32(s)), k); |
| 121 | } |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 122 | sumR += SkScalarMul(SkIntToScalar(SkGetPackedR32(s)), k); |
| 123 | sumG += SkScalarMul(SkIntToScalar(SkGetPackedG32(s)), k); |
| 124 | sumB += SkScalarMul(SkIntToScalar(SkGetPackedB32(s)), k); |
| 125 | } |
| 126 | } |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 127 | int a = convolveAlpha |
| 128 | ? SkClampMax(SkScalarFloorToInt(SkScalarMul(sumA, fGain) + fBias), 255) |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 129 | : 255; |
senorblanco@chromium.org | cc9471c | 2012-09-20 17:59:49 +0000 | [diff] [blame] | 130 | int r = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumR, fGain) + fBias), a); |
| 131 | int g = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumG, fGain) + fBias), a); |
| 132 | int b = SkClampMax(SkScalarFloorToInt(SkScalarMul(sumB, fGain) + fBias), a); |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 133 | if (!convolveAlpha) { |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 134 | a = SkGetPackedA32(PixelFetcher::fetch(src, x, y)); |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 135 | *dptr++ = SkPreMultiplyARGB(a, r, g, b); |
| 136 | } else { |
| 137 | *dptr++ = SkPackARGB32(a, r, g, b); |
| 138 | } |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 139 | } |
| 140 | } |
| 141 | } |
| 142 | |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 143 | template<class PixelFetcher> |
| 144 | void SkMatrixConvolutionImageFilter::filterPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { |
| 145 | if (fConvolveAlpha) { |
| 146 | filterPixels<PixelFetcher, true>(src, result, rect); |
| 147 | } else { |
| 148 | filterPixels<PixelFetcher, false>(src, result, rect); |
| 149 | } |
| 150 | } |
| 151 | |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 152 | void SkMatrixConvolutionImageFilter::filterInteriorPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { |
| 153 | filterPixels<UncheckedPixelFetcher>(src, result, rect); |
| 154 | } |
| 155 | |
| 156 | void SkMatrixConvolutionImageFilter::filterBorderPixels(const SkBitmap& src, SkBitmap* result, const SkIRect& rect) { |
| 157 | switch (fTileMode) { |
| 158 | case kClamp_TileMode: |
| 159 | filterPixels<ClampPixelFetcher>(src, result, rect); |
| 160 | break; |
| 161 | case kRepeat_TileMode: |
| 162 | filterPixels<RepeatPixelFetcher>(src, result, rect); |
| 163 | break; |
| 164 | case kClampToBlack_TileMode: |
| 165 | filterPixels<ClampToBlackPixelFetcher>(src, result, rect); |
| 166 | break; |
| 167 | } |
| 168 | } |
| 169 | |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 170 | // FIXME: This should be refactored to SkSingleInputImageFilter for |
| 171 | // use by other filters. For now, we assume the input is always |
| 172 | // premultiplied and unpremultiply it |
| 173 | static SkBitmap unpremultiplyBitmap(const SkBitmap& src) |
| 174 | { |
| 175 | SkAutoLockPixels alp(src); |
| 176 | if (!src.getPixels()) { |
| 177 | return SkBitmap(); |
| 178 | } |
| 179 | SkBitmap result; |
| 180 | result.setConfig(src.config(), src.width(), src.height()); |
| 181 | result.allocPixels(); |
| 182 | if (!result.getPixels()) { |
| 183 | return SkBitmap(); |
| 184 | } |
| 185 | for (int y = 0; y < src.height(); ++y) { |
| 186 | const uint32_t* srcRow = src.getAddr32(0, y); |
| 187 | uint32_t* dstRow = result.getAddr32(0, y); |
| 188 | for (int x = 0; x < src.width(); ++x) { |
| 189 | dstRow[x] = SkUnPreMultiply::PMColorToColor(srcRow[x]); |
| 190 | } |
| 191 | } |
| 192 | return result; |
| 193 | } |
| 194 | |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 195 | bool SkMatrixConvolutionImageFilter::onFilterImage(Proxy* proxy, |
| 196 | const SkBitmap& source, |
| 197 | const SkMatrix& matrix, |
| 198 | SkBitmap* result, |
| 199 | SkIPoint* loc) { |
| 200 | SkBitmap src = this->getInputResult(proxy, source, matrix, loc); |
| 201 | if (src.config() != SkBitmap::kARGB_8888_Config) { |
| 202 | return false; |
| 203 | } |
| 204 | |
senorblanco@chromium.org | 8640d50 | 2012-09-25 14:32:42 +0000 | [diff] [blame] | 205 | if (!fConvolveAlpha && !src.isOpaque()) { |
| 206 | src = unpremultiplyBitmap(src); |
| 207 | } |
| 208 | |
senorblanco@chromium.org | 5faa2dc | 2012-09-18 20:32:34 +0000 | [diff] [blame] | 209 | SkAutoLockPixels alp(src); |
| 210 | if (!src.getPixels()) { |
| 211 | return false; |
| 212 | } |
| 213 | |
| 214 | result->setConfig(src.config(), src.width(), src.height()); |
| 215 | result->allocPixels(); |
| 216 | |
| 217 | SkIRect interior = SkIRect::MakeXYWH(fTarget.fX, fTarget.fY, |
| 218 | src.width() - fKernelSize.fWidth + 1, |
| 219 | src.height() - fKernelSize.fHeight + 1); |
| 220 | SkIRect top = SkIRect::MakeWH(src.width(), fTarget.fY); |
| 221 | SkIRect bottom = SkIRect::MakeLTRB(0, interior.bottom(), |
| 222 | src.width(), src.height()); |
| 223 | SkIRect left = SkIRect::MakeXYWH(0, interior.top(), |
| 224 | fTarget.fX, interior.height()); |
| 225 | SkIRect right = SkIRect::MakeLTRB(interior.right(), interior.top(), |
| 226 | src.width(), interior.bottom()); |
| 227 | filterBorderPixels(src, result, top); |
| 228 | filterBorderPixels(src, result, left); |
| 229 | filterInteriorPixels(src, result, interior); |
| 230 | filterBorderPixels(src, result, right); |
| 231 | filterBorderPixels(src, result, bottom); |
| 232 | return true; |
| 233 | } |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 234 | |
| 235 | #if SK_SUPPORT_GPU |
| 236 | |
| 237 | /////////////////////////////////////////////////////////////////////////////// |
| 238 | |
| 239 | class GrGLMatrixConvolutionEffect; |
| 240 | |
| 241 | class GrMatrixConvolutionEffect : public GrSingleTextureEffect { |
| 242 | public: |
| 243 | typedef SkMatrixConvolutionImageFilter::TileMode TileMode; |
| 244 | GrMatrixConvolutionEffect(GrTexture*, |
| 245 | const SkISize& kernelSize, |
| 246 | const SkScalar* kernel, |
| 247 | SkScalar gain, |
| 248 | SkScalar bias, |
| 249 | const SkIPoint& target, |
| 250 | TileMode tileMode, |
| 251 | bool convolveAlpha); |
| 252 | virtual ~GrMatrixConvolutionEffect(); |
| 253 | |
| 254 | static const char* Name() { return "MatrixConvolution"; } |
| 255 | const SkISize& kernelSize() const { return fKernelSize; } |
| 256 | const float* target() const { return fTarget; } |
| 257 | const float* kernel() const { return fKernel; } |
| 258 | float gain() const { return fGain; } |
| 259 | float bias() const { return fBias; } |
| 260 | TileMode tileMode() const { return fTileMode; } |
| 261 | bool convolveAlpha() const { return fConvolveAlpha; } |
| 262 | |
| 263 | typedef GrGLMatrixConvolutionEffect GLProgramStage; |
| 264 | |
| 265 | virtual const GrProgramStageFactory& getFactory() const SK_OVERRIDE; |
bsalomon@google.com | a469c28 | 2012-10-24 18:28:34 +0000 | [diff] [blame] | 266 | virtual bool isEqual(const GrEffect&) const SK_OVERRIDE; |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 267 | |
| 268 | private: |
| 269 | SkISize fKernelSize; |
| 270 | float *fKernel; |
| 271 | float fGain; |
| 272 | float fBias; |
| 273 | float fTarget[2]; |
| 274 | TileMode fTileMode; |
| 275 | bool fConvolveAlpha; |
| 276 | |
bsalomon@google.com | f271cc7 | 2012-10-24 19:35:13 +0000 | [diff] [blame] | 277 | GR_DECLARE_EFFECT_TEST; |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 278 | |
| 279 | typedef GrSingleTextureEffect INHERITED; |
| 280 | }; |
| 281 | |
bsalomon@google.com | 374e759 | 2012-10-23 17:30:45 +0000 | [diff] [blame] | 282 | class GrGLMatrixConvolutionEffect : public GrGLLegacyProgramStage { |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 283 | public: |
| 284 | GrGLMatrixConvolutionEffect(const GrProgramStageFactory& factory, |
bsalomon@google.com | 021fc73 | 2012-10-25 12:47:42 +0000 | [diff] [blame] | 285 | const GrEffect& effect); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 286 | virtual void setupVariables(GrGLShaderBuilder* builder) SK_OVERRIDE; |
| 287 | virtual void emitVS(GrGLShaderBuilder* state, |
| 288 | const char* vertexCoords) SK_OVERRIDE {} |
| 289 | virtual void emitFS(GrGLShaderBuilder* state, |
| 290 | const char* outputColor, |
| 291 | const char* inputColor, |
| 292 | const TextureSamplerArray&) SK_OVERRIDE; |
| 293 | |
bsalomon@google.com | a469c28 | 2012-10-24 18:28:34 +0000 | [diff] [blame] | 294 | static inline StageKey GenKey(const GrEffect& s, const GrGLCaps& caps); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 295 | |
bsalomon@google.com | a469c28 | 2012-10-24 18:28:34 +0000 | [diff] [blame] | 296 | virtual void setData(const GrGLUniformManager&, const GrEffect&) SK_OVERRIDE; |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 297 | |
| 298 | private: |
| 299 | typedef GrGLUniformManager::UniformHandle UniformHandle; |
| 300 | typedef SkMatrixConvolutionImageFilter::TileMode TileMode; |
| 301 | SkISize fKernelSize; |
| 302 | TileMode fTileMode; |
| 303 | bool fConvolveAlpha; |
| 304 | |
| 305 | UniformHandle fKernelUni; |
| 306 | UniformHandle fImageIncrementUni; |
| 307 | UniformHandle fTargetUni; |
| 308 | UniformHandle fGainUni; |
| 309 | UniformHandle fBiasUni; |
bsalomon@google.com | 374e759 | 2012-10-23 17:30:45 +0000 | [diff] [blame] | 310 | |
| 311 | typedef GrGLLegacyProgramStage INHERITED; |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 312 | }; |
| 313 | |
| 314 | GrGLMatrixConvolutionEffect::GrGLMatrixConvolutionEffect(const GrProgramStageFactory& factory, |
bsalomon@google.com | 021fc73 | 2012-10-25 12:47:42 +0000 | [diff] [blame] | 315 | const GrEffect& effect) |
bsalomon@google.com | 374e759 | 2012-10-23 17:30:45 +0000 | [diff] [blame] | 316 | : INHERITED(factory) |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 317 | , fKernelUni(GrGLUniformManager::kInvalidUniformHandle) |
| 318 | , fImageIncrementUni(GrGLUniformManager::kInvalidUniformHandle) |
| 319 | , fTargetUni(GrGLUniformManager::kInvalidUniformHandle) |
| 320 | , fGainUni(GrGLUniformManager::kInvalidUniformHandle) |
| 321 | , fBiasUni(GrGLUniformManager::kInvalidUniformHandle) { |
bsalomon@google.com | 021fc73 | 2012-10-25 12:47:42 +0000 | [diff] [blame] | 322 | const GrMatrixConvolutionEffect& m = static_cast<const GrMatrixConvolutionEffect&>(effect); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 323 | fKernelSize = m.kernelSize(); |
| 324 | fTileMode = m.tileMode(); |
| 325 | fConvolveAlpha = m.convolveAlpha(); |
| 326 | } |
| 327 | |
| 328 | void GrGLMatrixConvolutionEffect::setupVariables(GrGLShaderBuilder* builder) { |
| 329 | fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| 330 | kVec2f_GrSLType, "ImageIncrement"); |
| 331 | fKernelUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_ShaderType, |
| 332 | kFloat_GrSLType, "Kernel", fKernelSize.width() * fKernelSize.height()); |
| 333 | fTargetUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| 334 | kVec2f_GrSLType, "Target"); |
| 335 | fGainUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| 336 | kFloat_GrSLType, "Gain"); |
| 337 | fBiasUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType, |
| 338 | kFloat_GrSLType, "Bias"); |
| 339 | } |
| 340 | |
| 341 | static void appendTextureLookup(GrGLShaderBuilder* builder, |
| 342 | const GrGLShaderBuilder::TextureSampler& sampler, |
| 343 | const char* coord, |
| 344 | SkMatrixConvolutionImageFilter::TileMode tileMode) { |
| 345 | SkString* code = &builder->fFSCode; |
| 346 | SkString clampedCoord; |
| 347 | switch (tileMode) { |
| 348 | case SkMatrixConvolutionImageFilter::kClamp_TileMode: |
| 349 | clampedCoord.printf("clamp(%s, 0.0, 1.0)", coord); |
| 350 | coord = clampedCoord.c_str(); |
| 351 | break; |
| 352 | case SkMatrixConvolutionImageFilter::kRepeat_TileMode: |
| 353 | clampedCoord.printf("fract(%s)", coord); |
| 354 | coord = clampedCoord.c_str(); |
| 355 | break; |
| 356 | case SkMatrixConvolutionImageFilter::kClampToBlack_TileMode: |
| 357 | code->appendf("clamp(%s, 0.0, 1.0) != %s ? vec4(0, 0, 0, 0) : ", coord, coord); |
| 358 | break; |
| 359 | } |
| 360 | builder->appendTextureLookup(code, sampler, coord); |
| 361 | } |
| 362 | |
| 363 | void GrGLMatrixConvolutionEffect::emitFS(GrGLShaderBuilder* builder, |
| 364 | const char* outputColor, |
| 365 | const char* inputColor, |
| 366 | const TextureSamplerArray& samplers) { |
| 367 | SkString* code = &builder->fFSCode; |
| 368 | |
| 369 | const char* target = builder->getUniformCStr(fTargetUni); |
| 370 | const char* imgInc = builder->getUniformCStr(fImageIncrementUni); |
| 371 | const char* kernel = builder->getUniformCStr(fKernelUni); |
| 372 | const char* gain = builder->getUniformCStr(fGainUni); |
| 373 | const char* bias = builder->getUniformCStr(fBiasUni); |
| 374 | int kWidth = fKernelSize.width(); |
| 375 | int kHeight = fKernelSize.height(); |
| 376 | |
| 377 | code->appendf("\t\tvec4 sum = vec4(0, 0, 0, 0);\n"); |
| 378 | code->appendf("\t\tvec2 coord = %s - %s * %s;\n", |
| 379 | builder->defaultTexCoordsName(), target, imgInc); |
| 380 | code->appendf("\t\tfor (int y = 0; y < %d; y++) {\n", kHeight); |
| 381 | code->appendf("\t\t\tfor (int x = 0; x < %d; x++) {\n", kWidth); |
| 382 | code->appendf("\t\t\t\tfloat k = %s[y * %d + x];\n", kernel, kWidth); |
| 383 | code->appendf("\t\t\t\tvec2 coord2 = coord + vec2(x, y) * %s;\n", imgInc); |
| 384 | code->appendf("\t\t\t\tvec4 c = "); |
| 385 | appendTextureLookup(builder, samplers[0], "coord2", fTileMode); |
| 386 | code->appendf(";\n"); |
| 387 | if (!fConvolveAlpha) { |
| 388 | code->appendf("\t\t\t\tc.rgb /= c.a;\n"); |
| 389 | } |
| 390 | code->appendf("\t\t\t\tsum += c * k;\n"); |
| 391 | code->appendf("\t\t\t}\n"); |
| 392 | code->appendf("\t\t}\n"); |
| 393 | if (fConvolveAlpha) { |
| 394 | code->appendf("\t\t%s = sum * %s + %s;\n", outputColor, gain, bias); |
| 395 | code->appendf("\t\t%s.rgb = clamp(%s.rgb, 0.0, %s.a);\n", outputColor, outputColor, outputColor); |
| 396 | } else { |
senorblanco@chromium.org | 9f7827f | 2012-10-04 18:15:15 +0000 | [diff] [blame] | 397 | code->appendf("\t\tvec4 c = "); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 398 | appendTextureLookup(builder, samplers[0], builder->defaultTexCoordsName(), fTileMode); |
senorblanco@chromium.org | 9f7827f | 2012-10-04 18:15:15 +0000 | [diff] [blame] | 399 | code->appendf(";\n"); |
| 400 | code->appendf("\t\t%s.a = c.a;\n", outputColor); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 401 | code->appendf("\t\t%s.rgb = sum.rgb * %s + %s;\n", outputColor, gain, bias); |
| 402 | code->appendf("\t\t%s.rgb *= %s.a;\n", outputColor, outputColor); |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | namespace { |
| 407 | |
| 408 | int encodeXY(int x, int y) { |
| 409 | SkASSERT(x >= 1 && y >= 1 && x * y <= 32); |
| 410 | if (y < x) |
| 411 | return 0x40 | encodeXY(y, x); |
skia.committer@gmail.com | dda28c9 | 2012-10-05 02:01:40 +0000 | [diff] [blame] | 412 | else |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 413 | return (0x40 >> x) | (y - x); |
| 414 | } |
| 415 | |
| 416 | }; |
| 417 | |
bsalomon@google.com | d698f77 | 2012-10-25 13:22:00 +0000 | [diff] [blame^] | 418 | GrGLEffect::StageKey GrGLMatrixConvolutionEffect::GenKey(const GrEffect& s, |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 419 | const GrGLCaps& caps) { |
| 420 | const GrMatrixConvolutionEffect& m = static_cast<const GrMatrixConvolutionEffect&>(s); |
| 421 | StageKey key = encodeXY(m.kernelSize().width(), m.kernelSize().height()); |
| 422 | key |= m.tileMode() << 7; |
| 423 | key |= m.convolveAlpha() ? 1 << 9 : 0; |
| 424 | return key; |
| 425 | } |
| 426 | |
| 427 | void GrGLMatrixConvolutionEffect::setData(const GrGLUniformManager& uman, |
bsalomon@google.com | a469c28 | 2012-10-24 18:28:34 +0000 | [diff] [blame] | 428 | const GrEffect& data) { |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 429 | const GrMatrixConvolutionEffect& effect = |
| 430 | static_cast<const GrMatrixConvolutionEffect&>(data); |
| 431 | GrGLTexture& texture = |
| 432 | *static_cast<GrGLTexture*>(data.texture(0)); |
| 433 | // the code we generated was for a specific kernel size |
| 434 | GrAssert(effect.kernelSize() == fKernelSize); |
| 435 | GrAssert(effect.tileMode() == fTileMode); |
| 436 | float imageIncrement[2]; |
| 437 | imageIncrement[0] = 1.0f / texture.width(); |
| 438 | imageIncrement[1] = 1.0f / texture.height(); |
| 439 | uman.set2fv(fImageIncrementUni, 0, 1, imageIncrement); |
| 440 | uman.set2fv(fTargetUni, 0, 1, effect.target()); |
| 441 | uman.set1fv(fKernelUni, 0, fKernelSize.width() * fKernelSize.height(), effect.kernel()); |
| 442 | uman.set1f(fGainUni, effect.gain()); |
| 443 | uman.set1f(fBiasUni, effect.bias()); |
| 444 | } |
| 445 | |
| 446 | GrMatrixConvolutionEffect::GrMatrixConvolutionEffect(GrTexture* texture, |
| 447 | const SkISize& kernelSize, |
| 448 | const SkScalar* kernel, |
| 449 | SkScalar gain, |
| 450 | SkScalar bias, |
| 451 | const SkIPoint& target, |
| 452 | TileMode tileMode, |
| 453 | bool convolveAlpha) |
| 454 | : INHERITED(texture), |
| 455 | fKernelSize(kernelSize), |
| 456 | fGain(SkScalarToFloat(gain)), |
| 457 | fBias(SkScalarToFloat(bias) / 255.0f), |
| 458 | fTileMode(tileMode), |
| 459 | fConvolveAlpha(convolveAlpha) { |
| 460 | fKernel = new float[kernelSize.width() * kernelSize.height()]; |
| 461 | for (int i = 0; i < kernelSize.width() * kernelSize.height(); i++) { |
| 462 | fKernel[i] = SkScalarToFloat(kernel[i]); |
| 463 | } |
| 464 | fTarget[0] = target.x(); |
| 465 | fTarget[1] = target.y(); |
| 466 | } |
| 467 | |
| 468 | GrMatrixConvolutionEffect::~GrMatrixConvolutionEffect() { |
| 469 | delete[] fKernel; |
| 470 | } |
| 471 | |
| 472 | const GrProgramStageFactory& GrMatrixConvolutionEffect::getFactory() const { |
| 473 | return GrTProgramStageFactory<GrMatrixConvolutionEffect>::getInstance(); |
| 474 | } |
| 475 | |
bsalomon@google.com | a469c28 | 2012-10-24 18:28:34 +0000 | [diff] [blame] | 476 | bool GrMatrixConvolutionEffect::isEqual(const GrEffect& sBase) const { |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 477 | const GrMatrixConvolutionEffect& s = |
| 478 | static_cast<const GrMatrixConvolutionEffect&>(sBase); |
| 479 | return INHERITED::isEqual(sBase) && |
| 480 | fKernelSize == s.kernelSize() && |
| 481 | !memcmp(fKernel, s.kernel(), fKernelSize.width() * fKernelSize.height() * sizeof(float)) && |
| 482 | fGain == s.gain() && |
| 483 | fBias == s.bias() && |
| 484 | fTarget == s.target() && |
| 485 | fTileMode == s.tileMode() && |
| 486 | fConvolveAlpha == s.convolveAlpha(); |
| 487 | } |
| 488 | |
bsalomon@google.com | f271cc7 | 2012-10-24 19:35:13 +0000 | [diff] [blame] | 489 | GR_DEFINE_EFFECT_TEST(GrMatrixConvolutionEffect); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 490 | |
skia.committer@gmail.com | dda28c9 | 2012-10-05 02:01:40 +0000 | [diff] [blame] | 491 | // A little bit less than the minimum # uniforms required by DX9SM2 (32). |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 492 | // Allows for a 5x5 kernel (or 25x1, for that matter). |
| 493 | #define MAX_KERNEL_SIZE 25 |
| 494 | |
bsalomon@google.com | a469c28 | 2012-10-24 18:28:34 +0000 | [diff] [blame] | 495 | GrEffect* GrMatrixConvolutionEffect::TestCreate(SkRandom* random, |
| 496 | GrContext* context, |
| 497 | GrTexture* textures[]) { |
bsalomon@google.com | 6f261be | 2012-10-24 19:07:10 +0000 | [diff] [blame] | 498 | int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx : |
| 499 | GrEffectUnitTest::kAlphaTextureIdx; |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 500 | int width = random->nextRangeU(1, MAX_KERNEL_SIZE); |
| 501 | int height = random->nextRangeU(1, MAX_KERNEL_SIZE / width); |
| 502 | SkISize kernelSize = SkISize::Make(width, height); |
| 503 | SkScalar* kernel = new SkScalar[width * height]; |
| 504 | for (int i = 0; i < width * height; i++) { |
| 505 | kernel[i] = random->nextSScalar1(); |
| 506 | } |
| 507 | SkScalar gain = random->nextSScalar1(); |
| 508 | SkScalar bias = random->nextSScalar1(); |
| 509 | SkIPoint target = SkIPoint::Make(random->nextRangeU(0, kernelSize.width()), |
| 510 | random->nextRangeU(0, kernelSize.height())); |
| 511 | TileMode tileMode = static_cast<TileMode>(random->nextRangeU(0, 2)); |
| 512 | bool convolveAlpha = random->nextBool(); |
| 513 | return SkNEW_ARGS(GrMatrixConvolutionEffect, (textures[texIdx], |
| 514 | kernelSize, |
| 515 | kernel, |
| 516 | gain, |
| 517 | bias, |
| 518 | target, |
| 519 | tileMode, |
| 520 | convolveAlpha)); |
| 521 | |
| 522 | } |
| 523 | |
bsalomon@google.com | 021fc73 | 2012-10-25 12:47:42 +0000 | [diff] [blame] | 524 | bool SkMatrixConvolutionImageFilter::asNewEffect(GrEffect** effect, |
bsalomon@google.com | 8ea78d8 | 2012-10-24 20:11:30 +0000 | [diff] [blame] | 525 | GrTexture* texture) const { |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 526 | bool ok = fKernelSize.width() * fKernelSize.height() <= MAX_KERNEL_SIZE; |
bsalomon@google.com | 021fc73 | 2012-10-25 12:47:42 +0000 | [diff] [blame] | 527 | if (ok && effect) { |
| 528 | *effect = SkNEW_ARGS(GrMatrixConvolutionEffect, (texture, |
| 529 | fKernelSize, |
| 530 | fKernel, |
| 531 | fGain, |
| 532 | fBias, |
| 533 | fTarget, |
| 534 | fTileMode, |
| 535 | fConvolveAlpha)); |
senorblanco@chromium.org | 3bc16c8 | 2012-10-04 17:18:20 +0000 | [diff] [blame] | 536 | } |
| 537 | return ok; |
| 538 | } |
| 539 | |
| 540 | /////////////////////////////////////////////////////////////////////////////// |
| 541 | |
| 542 | #endif |