1 /* 2 * Copyright 2019 Google LLC 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 #ifndef SkImageFilters_DEFINED 9 #define SkImageFilters_DEFINED 10 11 #include "include/core/SkBlendMode.h" 12 #include "include/core/SkColor.h" 13 #include "include/core/SkImage.h" 14 #include "include/core/SkImageFilter.h" 15 #include "include/core/SkPicture.h" 16 #include "include/core/SkRect.h" 17 #include "include/core/SkTileMode.h" 18 19 #include <cstddef> 20 21 class SkColorFilter; 22 class SkPaint; 23 class SkRegion; 24 25 namespace skif { 26 static constexpr SkRect kNoCropRect = {SK_ScalarNegativeInfinity, SK_ScalarNegativeInfinity, 27 SK_ScalarInfinity, SK_ScalarInfinity}; 28 } 29 30 // A set of factory functions providing useful SkImageFilter effects. For image filters that take an 31 // input filter, providing nullptr means it will automatically use the dynamic source image. This 32 // source depends on how the filter is applied, but is either the contents of a saved layer when 33 // drawing with SkCanvas, or an explicit SkImage if using SkImage::makeWithFilter. 34 class SK_API SkImageFilters { 35 public: 36 // This is just a convenience type to allow passing SkIRects, SkRects, and optional pointers 37 // to those types as a crop rect for the image filter factories. It's not intended to be used 38 // directly. 39 struct CropRect { CropRectCropRect40 CropRect() : fCropRect(skif::kNoCropRect) {} 41 // Intentionally not explicit so callers don't have to use this type but can use SkIRect or 42 // SkRect as desired. CropRectCropRect43 CropRect(std::nullptr_t) : fCropRect(skif::kNoCropRect) {} CropRectCropRect44 CropRect(const SkIRect& crop) : fCropRect(SkRect::Make(crop)) {} CropRectCropRect45 CropRect(const SkRect& crop) : fCropRect(crop) {} CropRectCropRect46 CropRect(const SkIRect* optionalCrop) : fCropRect(optionalCrop ? SkRect::Make(*optionalCrop) 47 : skif::kNoCropRect) {} CropRectCropRect48 CropRect(const SkRect* optionalCrop) : fCropRect(optionalCrop ? *optionalCrop 49 : skif::kNoCropRect) {} 50 51 operator const SkRect*() const { return fCropRect == skif::kNoCropRect ? nullptr : &fCropRect; } 52 53 SkRect fCropRect; 54 }; 55 56 /** 57 * Create a filter that updates the alpha of the image based on 'region'. Pixels inside the 58 * region are made more opaque and pixels outside are made more transparent. 59 * 60 * Specifically, if a pixel is inside the region, its alpha will be set to 61 * max(innerMin, pixel's alpha). If a pixel is outside the region, its alpha will be updated to 62 * min(outerMax, pixel's alpha). 63 * @param region The geometric region controlling the inner and outer alpha thresholds. 64 * @param innerMin The minimum alpha value for pixels inside 'region'. 65 * @param outerMax The maximum alpha value for pixels outside of 'region'. 66 * @param input The input filter, or uses the source bitmap if this is null. 67 * @param cropRect Optional rectangle that crops the input and output. 68 */ 69 static sk_sp<SkImageFilter> AlphaThreshold(const SkRegion& region, SkScalar innerMin, 70 SkScalar outerMax, sk_sp<SkImageFilter> input, 71 const CropRect& cropRect = {}); 72 73 /** 74 * Create a filter that implements a custom blend mode. Each output pixel is the result of 75 * combining the corresponding background and foreground pixels using the 4 coefficients: 76 * k1 * foreground * background + k2 * foreground + k3 * background + k4 77 * @param k1, k2, k3, k4 The four coefficients used to combine the foreground and background. 78 * @param enforcePMColor If true, the RGB channels will be clamped to the calculated alpha. 79 * @param background The background content, using the source bitmap when this is null. 80 * @param foreground The foreground content, using the source bitmap when this is null. 81 * @param cropRect Optional rectangle that crops the inputs and output. 82 */ 83 static sk_sp<SkImageFilter> Arithmetic(SkScalar k1, SkScalar k2, SkScalar k3, SkScalar k4, 84 bool enforcePMColor, sk_sp<SkImageFilter> background, 85 sk_sp<SkImageFilter> foreground, 86 const CropRect& cropRect = {}); 87 88 /** 89 * This filter takes an SkBlendMode and uses it to composite the two filters together. 90 * @param mode The blend mode that defines the compositing operation 91 * @param background The Dst pixels used in blending, if null the source bitmap is used. 92 * @param foreground The Src pixels used in blending, if null the source bitmap is used. 93 * @cropRect Optional rectangle to crop input and output. 94 */ 95 static sk_sp<SkImageFilter> Blend(SkBlendMode mode, sk_sp<SkImageFilter> background, 96 sk_sp<SkImageFilter> foreground = nullptr, 97 const CropRect& cropRect = {}); 98 99 /** 100 * Create a filter that blurs its input by the separate X and Y sigmas. The provided tile mode 101 * is used when the blur kernel goes outside the input image. 102 * @param sigmaX The Gaussian sigma value for blurring along the X axis. 103 * @param sigmaY The Gaussian sigma value for blurring along the Y axis. 104 * @param tileMode The tile mode applied at edges . 105 * TODO (michaelludwig) - kMirror is not supported yet 106 * @param input The input filter that is blurred, uses source bitmap if this is null. 107 * @param cropRect Optional rectangle that crops the input and output. 108 */ 109 static sk_sp<SkImageFilter> Blur(SkScalar sigmaX, SkScalar sigmaY, SkTileMode tileMode, 110 sk_sp<SkImageFilter> input, const CropRect& cropRect = {}); 111 // As above, but defaults to the decal tile mode. 112 static sk_sp<SkImageFilter> Blur(SkScalar sigmaX, SkScalar sigmaY, sk_sp<SkImageFilter> input, 113 const CropRect& cropRect = {}) { 114 return Blur(sigmaX, sigmaY, SkTileMode::kDecal, std::move(input), cropRect); 115 } 116 117 /** 118 * Create a filter that applies the color filter to the input filter results. 119 * @param cf The color filter that transforms the input image. 120 * @param input The input filter, or uses the source bitmap if this is null. 121 * @param cropRect Optional rectangle that crops the input and output. 122 */ 123 static sk_sp<SkImageFilter> ColorFilter(sk_sp<SkColorFilter> cf, sk_sp<SkImageFilter> input, 124 const CropRect& cropRect = {}); 125 126 /** 127 * Create a filter that composes 'inner' with 'outer', such that the results of 'inner' are 128 * treated as the source bitmap passed to 'outer', i.e. result = outer(inner(source)). 129 * @param outer The outer filter that evaluates the results of inner. 130 * @param inner The inner filter that produces the input to outer. 131 */ 132 static sk_sp<SkImageFilter> Compose(sk_sp<SkImageFilter> outer, sk_sp<SkImageFilter> inner); 133 134 /** 135 * Create a filter that moves each pixel in its color input based on an (x,y) vector encoded 136 * in its displacement input filter. Two color components of the displacement image are 137 * mapped into a vector as scale * (color[xChannel], color[yChannel]), where the channel 138 * selectors are one of R, G, B, or A. 139 * @param xChannelSelector RGBA channel that encodes the x displacement per pixel. 140 * @param yChannelSelector RGBA channel that encodes the y displacement per pixel. 141 * @param scale Scale applied to displacement extracted from image. 142 * @param displacement The filter defining the displacement image, or null to use source. 143 * @param color The filter providing the color pixels to be displaced. 144 * @param cropRect Optional rectangle that crops the color input and output. 145 */ 146 static sk_sp<SkImageFilter> DisplacementMap(SkColorChannel xChannelSelector, 147 SkColorChannel yChannelSelector, 148 SkScalar scale, sk_sp<SkImageFilter> displacement, 149 sk_sp<SkImageFilter> color, 150 const CropRect& cropRect = {}); 151 152 /** 153 * Create a filter that draws a drop shadow under the input content. This filter produces an 154 * image that includes the inputs' content. 155 * @param dx The X offset of the shadow. 156 * @param dy The Y offset of the shadow. 157 * @param sigmaX The blur radius for the shadow, along the X axis. 158 * @param sigmaY The blur radius for the shadow, along the Y axis. 159 * @param color The color of the drop shadow. 160 * @param input The input filter, or will use the source bitmap if this is null. 161 * @param cropRect Optional rectangle that crops the input and output. 162 */ 163 static sk_sp<SkImageFilter> DropShadow(SkScalar dx, SkScalar dy, 164 SkScalar sigmaX, SkScalar sigmaY, 165 SkColor color, sk_sp<SkImageFilter> input, 166 const CropRect& cropRect = {}); 167 /** 168 * Create a filter that renders a drop shadow, in exactly the same manner as ::DropShadow, 169 * except that the resulting image does not include the input content. This allows the shadow 170 * and input to be composed by a filter DAG in a more flexible manner. 171 * @param dx The X offset of the shadow. 172 * @param dy The Y offset of the shadow. 173 * @param sigmaX The blur radius for the shadow, along the X axis. 174 * @param sigmaY The blur radius for the shadow, along the Y axis. 175 * @param color The color of the drop shadow. 176 * @param input The input filter, or will use the source bitmap if this is null. 177 * @param cropRect Optional rectangle that crops the input and output. 178 */ 179 static sk_sp<SkImageFilter> DropShadowOnly(SkScalar dx, SkScalar dy, 180 SkScalar sigmaX, SkScalar sigmaY, 181 SkColor color, sk_sp<SkImageFilter> input, 182 const CropRect& cropRect = {}); 183 184 /** 185 * Create a filter that draws the 'srcRect' portion of image into 'dstRect' using the given 186 * filter quality. Similar to SkCanvas::drawImageRect. Returns null if 'image' is null. 187 * @param image The image that is output by the filter, subset by 'srcRect'. 188 * @param srcRect The source pixels sampled into 'dstRect' 189 * @param dstRect The local rectangle to draw the image into. 190 * @param sampling The sampling to use when drawing the image. 191 */ 192 static sk_sp<SkImageFilter> Image(sk_sp<SkImage> image, const SkRect& srcRect, 193 const SkRect& dstRect, const SkSamplingOptions& sampling); 194 195 /** 196 * Create a filter that draws the image using the given sampling. 197 * Similar to SkCanvas::drawImage. Returns null if 'image' is null. 198 * @param image The image that is output by the filter. 199 * @param sampling The sampling to use when drawing the image. 200 */ Image(sk_sp<SkImage> image,const SkSamplingOptions & sampling)201 static sk_sp<SkImageFilter> Image(sk_sp<SkImage> image, const SkSamplingOptions& sampling) { 202 if (image) { 203 SkRect r = SkRect::Make(image->bounds()); 204 return Image(std::move(image), r, r, sampling); 205 } else { 206 return nullptr; 207 } 208 } 209 210 /** 211 * Create a filter that draws the image using Mitchel cubic resampling. 212 * @param image The image that is output by the filter. 213 */ Image(sk_sp<SkImage> image)214 static sk_sp<SkImageFilter> Image(sk_sp<SkImage> image) { 215 return Image(std::move(image), SkSamplingOptions({1/3.0f, 1/3.0f})); 216 } 217 218 /** 219 * Create a filter that mimics a zoom/magnifying lens effect. 220 * @param srcRect 221 * @param inset 222 * @param input The input filter that is magnified, if null the source bitmap is used. 223 * @param cropRect Optional rectangle that crops the input and output. 224 */ 225 static sk_sp<SkImageFilter> Magnifier(const SkRect& srcRect, SkScalar inset, 226 sk_sp<SkImageFilter> input, 227 const CropRect& cropRect = {}); 228 229 /** 230 * Create a filter that applies an NxM image processing kernel to the input image. This can be 231 * used to produce effects such as sharpening, blurring, edge detection, etc. 232 * @param kernelSize The kernel size in pixels, in each dimension (N by M). 233 * @param kernel The image processing kernel. Must contain N * M elements, in row order. 234 * @param gain A scale factor applied to each pixel after convolution. This can be 235 * used to normalize the kernel, if it does not already sum to 1. 236 * @param bias A bias factor added to each pixel after convolution. 237 * @param kernelOffset An offset applied to each pixel coordinate before convolution. 238 * This can be used to center the kernel over the image 239 * (e.g., a 3x3 kernel should have an offset of {1, 1}). 240 * @param tileMode How accesses outside the image are treated. 241 * TODO (michaelludwig) - kMirror is not supported yet 242 * @param convolveAlpha If true, all channels are convolved. If false, only the RGB channels 243 * are convolved, and alpha is copied from the source image. 244 * @param input The input image filter, if null the source bitmap is used instead. 245 * @param cropRect Optional rectangle to which the output processing will be limited. 246 */ 247 static sk_sp<SkImageFilter> MatrixConvolution(const SkISize& kernelSize, 248 const SkScalar kernel[], SkScalar gain, 249 SkScalar bias, const SkIPoint& kernelOffset, 250 SkTileMode tileMode, bool convolveAlpha, 251 sk_sp<SkImageFilter> input, 252 const CropRect& cropRect = {}); 253 254 /** 255 * Create a filter that transforms the input image by 'matrix'. This matrix transforms the 256 * local space, which means it effectively happens prior to any transformation coming from the 257 * SkCanvas initiating the filtering. 258 * @param matrix The matrix to apply to the original content. 259 * @param sampling How the image will be sampled when it is transformed 260 * @param input The image filter to transform, or null to use the source image. 261 */ 262 static sk_sp<SkImageFilter> MatrixTransform(const SkMatrix& matrix, 263 const SkSamplingOptions& sampling, 264 sk_sp<SkImageFilter> input); 265 266 /** 267 * Create a filter that merges the 'count' filters together by drawing their results in order 268 * with src-over blending. 269 * @param filters The input filter array to merge, which must have 'count' elements. Any null 270 * filter pointers will use the source bitmap instead. 271 * @param count The number of input filters to be merged. 272 * @param cropRect Optional rectangle that crops all input filters and the output. 273 */ 274 static sk_sp<SkImageFilter> Merge(sk_sp<SkImageFilter>* const filters, int count, 275 const CropRect& cropRect = {}); 276 /** 277 * Create a filter that merges the results of the two filters together with src-over blending. 278 * @param first The first input filter, or the source bitmap if this is null. 279 * @param second The second input filter, or the source bitmap if this null. 280 * @param cropRect Optional rectangle that crops the inputs and output. 281 */ 282 static sk_sp<SkImageFilter> Merge(sk_sp<SkImageFilter> first, sk_sp<SkImageFilter> second, 283 const CropRect& cropRect = {}) { 284 sk_sp<SkImageFilter> array[] = { std::move(first), std::move(second) }; 285 return Merge(array, 2, cropRect); 286 } 287 288 /** 289 * Create a filter that offsets the input filter by the given vector. 290 * @param dx The x offset in local space that the image is shifted. 291 * @param dy The y offset in local space that the image is shifted. 292 * @param input The input that will be moved, if null the source bitmap is used instead. 293 * @param cropRect Optional rectangle to crop the input and output. 294 */ 295 static sk_sp<SkImageFilter> Offset(SkScalar dx, SkScalar dy, sk_sp<SkImageFilter> input, 296 const CropRect& cropRect = {}); 297 298 /** 299 * Create a filter that fills the output with the given paint. 300 * @param paint The paint to fill 301 * @param cropRect Optional rectangle that will be filled. If null, the source bitmap's bounds 302 * are filled even though the source bitmap itself is not used. 303 * 304 * DEPRECATED: Use Shader() instead, since many features of SkPaint are ignored when filling 305 * the target output, and paint color/alpha can be emulated with SkShaders::Color(). 306 */ 307 static sk_sp<SkImageFilter> Paint(const SkPaint& paint, const CropRect& cropRect = {}); 308 309 /** 310 * Create a filter that produces the SkPicture as its output, drawn into targetRect. Note that 311 * the targetRect is not the same as the SkIRect cropRect that many filters accept. Returns 312 * null if 'pic' is null. 313 * @param pic The picture that is drawn for the filter output. 314 * @param targetRect The drawing region for the picture. 315 */ 316 static sk_sp<SkImageFilter> Picture(sk_sp<SkPicture> pic, const SkRect& targetRect); 317 // As above, but uses SkPicture::cullRect for the drawing region. Picture(sk_sp<SkPicture> pic)318 static sk_sp<SkImageFilter> Picture(sk_sp<SkPicture> pic) { 319 SkRect target = pic ? pic->cullRect() : SkRect::MakeEmpty(); 320 return Picture(std::move(pic), target); 321 } 322 323 enum class Dither : bool { 324 kNo = false, 325 kYes = true 326 }; 327 328 /** 329 * Create a filter that fills the output with the per-pixel evaluation of the SkShader. The 330 * shader is defined in the image filter's local coordinate system, so will automatically 331 * be affected by SkCanvas' transform. 332 * 333 * Like Image() and Picture(), this is a leaf filter that can be used to introduce inputs to 334 * a complex filter graph, but should generally be combined with a filter that as at least 335 * one null input to use the implicit source image. 336 * @param shader The shader that fills the result image 337 */ 338 static sk_sp<SkImageFilter> Shader(sk_sp<SkShader> shader, const CropRect& cropRect = {}) { 339 return Shader(std::move(shader), Dither::kNo, cropRect); 340 } 341 static sk_sp<SkImageFilter> Shader(sk_sp<SkShader> shader, Dither dither, 342 const CropRect& cropRect = {}); 343 344 /** 345 * Create a tile image filter. 346 * @param src Defines the pixels to tile 347 * @param dst Defines the pixel region that the tiles will be drawn to 348 * @param input The input that will be tiled, if null the source bitmap is used instead. 349 */ 350 static sk_sp<SkImageFilter> Tile(const SkRect& src, const SkRect& dst, 351 sk_sp<SkImageFilter> input); 352 353 // Morphology filter effects 354 355 /** 356 * Create a filter that dilates each input pixel's channel values to the max value within the 357 * given radii along the x and y axes. 358 * @param radiusX The distance to dilate along the x axis to either side of each pixel. 359 * @param radiusY The distance to dilate along the y axis to either side of each pixel. 360 * @param input The image filter that is dilated, using source bitmap if this is null. 361 * @param cropRect Optional rectangle that crops the input and output. 362 */ 363 static sk_sp<SkImageFilter> Dilate(SkScalar radiusX, SkScalar radiusY, 364 sk_sp<SkImageFilter> input, 365 const CropRect& cropRect = {}); 366 367 /** 368 * Create a filter that erodes each input pixel's channel values to the minimum channel value 369 * within the given radii along the x and y axes. 370 * @param radiusX The distance to erode along the x axis to either side of each pixel. 371 * @param radiusY The distance to erode along the y axis to either side of each pixel. 372 * @param input The image filter that is eroded, using source bitmap if this is null. 373 * @param cropRect Optional rectangle that crops the input and output. 374 */ 375 static sk_sp<SkImageFilter> Erode(SkScalar radiusX, SkScalar radiusY, 376 sk_sp<SkImageFilter> input, 377 const CropRect& cropRect = {}); 378 379 // Lighting filter effects 380 381 /** 382 * Create a filter that calculates the diffuse illumination from a distant light source, 383 * interpreting the alpha channel of the input as the height profile of the surface (to 384 * approximate normal vectors). 385 * @param direction The direction to the distance light. 386 * @param lightColor The color of the diffuse light source. 387 * @param surfaceScale Scale factor to transform from alpha values to physical height. 388 * @param kd Diffuse reflectance coefficient. 389 * @param input The input filter that defines surface normals (as alpha), or uses the 390 * source bitmap when null. 391 * @param cropRect Optional rectangle that crops the input and output. 392 */ 393 static sk_sp<SkImageFilter> DistantLitDiffuse(const SkPoint3& direction, SkColor lightColor, 394 SkScalar surfaceScale, SkScalar kd, 395 sk_sp<SkImageFilter> input, 396 const CropRect& cropRect = {}); 397 /** 398 * Create a filter that calculates the diffuse illumination from a point light source, using 399 * alpha channel of the input as the height profile of the surface (to approximate normal 400 * vectors). 401 * @param location The location of the point light. 402 * @param lightColor The color of the diffuse light source. 403 * @param surfaceScale Scale factor to transform from alpha values to physical height. 404 * @param kd Diffuse reflectance coefficient. 405 * @param input The input filter that defines surface normals (as alpha), or uses the 406 * source bitmap when null. 407 * @param cropRect Optional rectangle that crops the input and output. 408 */ 409 static sk_sp<SkImageFilter> PointLitDiffuse(const SkPoint3& location, SkColor lightColor, 410 SkScalar surfaceScale, SkScalar kd, 411 sk_sp<SkImageFilter> input, 412 const CropRect& cropRect = {}); 413 /** 414 * Create a filter that calculates the diffuse illumination from a spot light source, using 415 * alpha channel of the input as the height profile of the surface (to approximate normal 416 * vectors). The spot light is restricted to be within 'cutoffAngle' of the vector between 417 * the location and target. 418 * @param location The location of the spot light. 419 * @param target The location that the spot light is point towards 420 * @param falloffExponent Exponential falloff parameter for illumination outside of cutoffAngle 421 * @param cutoffAngle Maximum angle from lighting direction that receives full light 422 * @param lightColor The color of the diffuse light source. 423 * @param surfaceScale Scale factor to transform from alpha values to physical height. 424 * @param kd Diffuse reflectance coefficient. 425 * @param input The input filter that defines surface normals (as alpha), or uses the 426 * source bitmap when null. 427 * @param cropRect Optional rectangle that crops the input and output. 428 */ 429 static sk_sp<SkImageFilter> SpotLitDiffuse(const SkPoint3& location, const SkPoint3& target, 430 SkScalar falloffExponent, SkScalar cutoffAngle, 431 SkColor lightColor, SkScalar surfaceScale, 432 SkScalar kd, sk_sp<SkImageFilter> input, 433 const CropRect& cropRect = {}); 434 435 /** 436 * Create a filter that calculates the specular illumination from a distant light source, 437 * interpreting the alpha channel of the input as the height profile of the surface (to 438 * approximate normal vectors). 439 * @param direction The direction to the distance light. 440 * @param lightColor The color of the specular light source. 441 * @param surfaceScale Scale factor to transform from alpha values to physical height. 442 * @param ks Specular reflectance coefficient. 443 * @param shininess The specular exponent determining how shiny the surface is. 444 * @param input The input filter that defines surface normals (as alpha), or uses the 445 * source bitmap when null. 446 * @param cropRect Optional rectangle that crops the input and output. 447 */ 448 static sk_sp<SkImageFilter> DistantLitSpecular(const SkPoint3& direction, SkColor lightColor, 449 SkScalar surfaceScale, SkScalar ks, 450 SkScalar shininess, sk_sp<SkImageFilter> input, 451 const CropRect& cropRect = {}); 452 /** 453 * Create a filter that calculates the specular illumination from a point light source, using 454 * alpha channel of the input as the height profile of the surface (to approximate normal 455 * vectors). 456 * @param location The location of the point light. 457 * @param lightColor The color of the specular light source. 458 * @param surfaceScale Scale factor to transform from alpha values to physical height. 459 * @param ks Specular reflectance coefficient. 460 * @param shininess The specular exponent determining how shiny the surface is. 461 * @param input The input filter that defines surface normals (as alpha), or uses the 462 * source bitmap when null. 463 * @param cropRect Optional rectangle that crops the input and output. 464 */ 465 static sk_sp<SkImageFilter> PointLitSpecular(const SkPoint3& location, SkColor lightColor, 466 SkScalar surfaceScale, SkScalar ks, 467 SkScalar shininess, sk_sp<SkImageFilter> input, 468 const CropRect& cropRect = {}); 469 /** 470 * Create a filter that calculates the specular illumination from a spot light source, using 471 * alpha channel of the input as the height profile of the surface (to approximate normal 472 * vectors). The spot light is restricted to be within 'cutoffAngle' of the vector between 473 * the location and target. 474 * @param location The location of the spot light. 475 * @param target The location that the spot light is point towards 476 * @param falloffExponent Exponential falloff parameter for illumination outside of cutoffAngle 477 * @param cutoffAngle Maximum angle from lighting direction that receives full light 478 * @param lightColor The color of the specular light source. 479 * @param surfaceScale Scale factor to transform from alpha values to physical height. 480 * @param ks Specular reflectance coefficient. 481 * @param shininess The specular exponent determining how shiny the surface is. 482 * @param input The input filter that defines surface normals (as alpha), or uses the 483 * source bitmap when null. 484 * @param cropRect Optional rectangle that crops the input and output. 485 */ 486 static sk_sp<SkImageFilter> SpotLitSpecular(const SkPoint3& location, const SkPoint3& target, 487 SkScalar falloffExponent, SkScalar cutoffAngle, 488 SkColor lightColor, SkScalar surfaceScale, 489 SkScalar ks, SkScalar shininess, 490 sk_sp<SkImageFilter> input, 491 const CropRect& cropRect = {}); 492 493 private: 494 SkImageFilters() = delete; 495 }; 496 497 #endif // SkImageFilters_DEFINED 498