DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (d38398e5144e)

VCS Links

AlphaModel

AttributeMap

AttributeName

AttributeType

ColorModel

ColorSpace

FilterDescription

FilterPrimitiveDescription

FilterSupport

PrimitiveType

Macros

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef __FilterSupport_h
#define __FilterSupport_h

#include "mozilla/Attributes.h"
#include "mozilla/RefPtr.h"
#include "mozilla/gfx/Rect.h"
#include "mozilla/gfx/Matrix.h"
#include "mozilla/gfx/2D.h"
#include "nsClassHashtable.h"
#include "nsTArray.h"
#include "nsRegion.h"

namespace mozilla {
namespace gfx {

// Morphology Operators
const unsigned short SVG_OPERATOR_UNKNOWN = 0;
const unsigned short SVG_OPERATOR_ERODE = 1;
const unsigned short SVG_OPERATOR_DILATE = 2;

// ColorMatrix types
const unsigned short SVG_FECOLORMATRIX_TYPE_UNKNOWN = 0;
const unsigned short SVG_FECOLORMATRIX_TYPE_MATRIX = 1;
const unsigned short SVG_FECOLORMATRIX_TYPE_SATURATE = 2;
const unsigned short SVG_FECOLORMATRIX_TYPE_HUE_ROTATE = 3;
const unsigned short SVG_FECOLORMATRIX_TYPE_LUMINANCE_TO_ALPHA = 4;
// ColorMatrix types for CSS filters
const unsigned short SVG_FECOLORMATRIX_TYPE_SEPIA = 5;

// ComponentTransfer types
const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_UNKNOWN  = 0;
const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_IDENTITY = 1;
const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_TABLE    = 2;
const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_DISCRETE = 3;
const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_LINEAR   = 4;
const unsigned short SVG_FECOMPONENTTRANSFER_TYPE_GAMMA    = 5;

// Blend Mode Values
const unsigned short SVG_FEBLEND_MODE_UNKNOWN = 0;
const unsigned short SVG_FEBLEND_MODE_NORMAL = 1;
const unsigned short SVG_FEBLEND_MODE_MULTIPLY = 2;
const unsigned short SVG_FEBLEND_MODE_SCREEN = 3;
const unsigned short SVG_FEBLEND_MODE_DARKEN = 4;
const unsigned short SVG_FEBLEND_MODE_LIGHTEN = 5;
const unsigned short SVG_FEBLEND_MODE_OVERLAY = 6;
const unsigned short SVG_FEBLEND_MODE_COLOR_DODGE = 7;
const unsigned short SVG_FEBLEND_MODE_COLOR_BURN = 8;
const unsigned short SVG_FEBLEND_MODE_HARD_LIGHT = 9;
const unsigned short SVG_FEBLEND_MODE_SOFT_LIGHT = 10;
const unsigned short SVG_FEBLEND_MODE_DIFFERENCE = 11;
const unsigned short SVG_FEBLEND_MODE_EXCLUSION = 12;
const unsigned short SVG_FEBLEND_MODE_HUE = 13;
const unsigned short SVG_FEBLEND_MODE_SATURATION = 14;
const unsigned short SVG_FEBLEND_MODE_COLOR = 15;
const unsigned short SVG_FEBLEND_MODE_LUMINOSITY = 16;

// Edge Mode Values
const unsigned short SVG_EDGEMODE_UNKNOWN = 0;
const unsigned short SVG_EDGEMODE_DUPLICATE = 1;
const unsigned short SVG_EDGEMODE_WRAP = 2;
const unsigned short SVG_EDGEMODE_NONE = 3;

// Channel Selectors
const unsigned short SVG_CHANNEL_UNKNOWN = 0;
const unsigned short SVG_CHANNEL_R = 1;
const unsigned short SVG_CHANNEL_G = 2;
const unsigned short SVG_CHANNEL_B = 3;
const unsigned short SVG_CHANNEL_A = 4;

// Turbulence Types
const unsigned short SVG_TURBULENCE_TYPE_UNKNOWN = 0;
const unsigned short SVG_TURBULENCE_TYPE_FRACTALNOISE = 1;
const unsigned short SVG_TURBULENCE_TYPE_TURBULENCE = 2;

// Composite Operators
const unsigned short SVG_FECOMPOSITE_OPERATOR_UNKNOWN = 0;
const unsigned short SVG_FECOMPOSITE_OPERATOR_OVER = 1;
const unsigned short SVG_FECOMPOSITE_OPERATOR_IN = 2;
const unsigned short SVG_FECOMPOSITE_OPERATOR_OUT = 3;
const unsigned short SVG_FECOMPOSITE_OPERATOR_ATOP = 4;
const unsigned short SVG_FECOMPOSITE_OPERATOR_XOR = 5;
const unsigned short SVG_FECOMPOSITE_OPERATOR_ARITHMETIC = 6;

enum AttributeName {
  eBlendBlendmode = 0,
  eMorphologyRadii,
  eMorphologyOperator,
  eColorMatrixType,
  eColorMatrixValues,
  eFloodColor,
  eTileSourceRect,
  eComponentTransferFunctionR,
  eComponentTransferFunctionG,
  eComponentTransferFunctionB,
  eComponentTransferFunctionA,
  eComponentTransferFunctionType,
  eComponentTransferFunctionTableValues,
  eComponentTransferFunctionSlope,
  eComponentTransferFunctionIntercept,
  eComponentTransferFunctionAmplitude,
  eComponentTransferFunctionExponent,
  eComponentTransferFunctionOffset,
  eConvolveMatrixKernelSize,
  eConvolveMatrixKernelMatrix,
  eConvolveMatrixDivisor,
  eConvolveMatrixBias,
  eConvolveMatrixTarget,
  eConvolveMatrixEdgeMode,
  eConvolveMatrixKernelUnitLength,
  eConvolveMatrixPreserveAlpha,
  eOffsetOffset,
  eDropShadowStdDeviation,
  eDropShadowOffset,
  eDropShadowColor,
  eDisplacementMapScale,
  eDisplacementMapXChannel,
  eDisplacementMapYChannel,
  eTurbulenceOffset,
  eTurbulenceBaseFrequency,
  eTurbulenceNumOctaves,
  eTurbulenceSeed,
  eTurbulenceStitchable,
  eTurbulenceType,
  eCompositeOperator,
  eCompositeCoefficients,
  eGaussianBlurStdDeviation,
  eLightingLight,
  eLightingSurfaceScale,
  eLightingKernelUnitLength,
  eLightingColor,
  eDiffuseLightingDiffuseConstant,
  eSpecularLightingSpecularConstant,
  eSpecularLightingSpecularExponent,
  eLightType,
  eLightTypeNone,
  eLightTypePoint,
  eLightTypeSpot,
  eLightTypeDistant,
  ePointLightPosition,
  eSpotLightPosition,
  eSpotLightPointsAt,
  eSpotLightFocus,
  eSpotLightLimitingConeAngle,
  eDistantLightAzimuth,
  eDistantLightElevation,
  eImageInputIndex,
  eImageFilter,
  eImageNativeSize,
  eImageSubregion,
  eImageTransform,
  eLastAttributeName
};

class DrawTarget;
class SourceSurface;
struct FilterAttribute;

enum class AttributeType {
  eBool,
  eUint,
  eFloat,
  eSize,
  eIntSize,
  eIntPoint,
  eMatrix,
  eMatrix5x4,
  ePoint3D,
  eColor,
  eAttributeMap,
  eFloats,
  Max
};

// Limits
const float kMaxStdDeviation = 500;

// A class that stores values of different types, keyed by an attribute name.
// The Get*() methods assert that they're called for the same type that the
// attribute was Set() with.
// AttributeMaps can be nested because AttributeMap is a valid attribute type.
class AttributeMap final {
public:
  AttributeMap();
  AttributeMap(const AttributeMap& aOther);
  AttributeMap& operator=(const AttributeMap& aOther);
  bool operator==(const AttributeMap& aOther) const;
  bool operator!=(const AttributeMap& aOther) const
  {
    return !(*this == aOther);
  }
  ~AttributeMap();

  void Set(AttributeName aName, bool aValue);
  void Set(AttributeName aName, uint32_t aValue);
  void Set(AttributeName aName, float aValue);
  void Set(AttributeName aName, const Size& aValue);
  void Set(AttributeName aName, const IntSize& aValue);
  void Set(AttributeName aName, const IntPoint& aValue);
  void Set(AttributeName aName, const Matrix& aValue);
  void Set(AttributeName aName, const Matrix5x4& aValue);
  void Set(AttributeName aName, const Point3D& aValue);
  void Set(AttributeName aName, const Color& aValue);
  void Set(AttributeName aName, const AttributeMap& aValue);
  void Set(AttributeName aName, const float* aValues, int32_t aLength);

  bool GetBool(AttributeName aName) const;
  uint32_t GetUint(AttributeName aName) const;
  float GetFloat(AttributeName aName) const;
  Size GetSize(AttributeName aName) const;
  IntSize GetIntSize(AttributeName aName) const;
  IntPoint GetIntPoint(AttributeName aName) const;
  Matrix GetMatrix(AttributeName aName) const;
  Matrix5x4 GetMatrix5x4(AttributeName aName) const;
  Point3D GetPoint3D(AttributeName aName) const;
  Color GetColor(AttributeName aName) const;
  AttributeMap GetAttributeMap(AttributeName aName) const;
  const nsTArray<float>& GetFloats(AttributeName aName) const;

  uint32_t Count() const;

  nsClassHashtable<nsUint32HashKey, FilterAttribute>::Iterator ConstIter() const;

  static AttributeType GetType(FilterAttribute* aAttribute);

private:
  mutable nsClassHashtable<nsUint32HashKey, FilterAttribute>  mMap;
};

enum class ColorSpace {
  SRGB,
  LinearRGB,
  Max
};

enum class AlphaModel {
  Unpremultiplied,
  Premultiplied
};

class ColorModel {
public:
  static ColorModel PremulSRGB()
  {
    return ColorModel(ColorSpace::SRGB, AlphaModel::Premultiplied);
  }

  ColorModel(ColorSpace aColorSpace, AlphaModel aAlphaModel) :
    mColorSpace(aColorSpace), mAlphaModel(aAlphaModel) {}
  ColorModel() :
    mColorSpace(ColorSpace::SRGB), mAlphaModel(AlphaModel::Premultiplied) {}
  bool operator==(const ColorModel& aOther) const {
    return mColorSpace == aOther.mColorSpace &&
           mAlphaModel == aOther.mAlphaModel;
  }

  // Used to index FilterCachedColorModels::mFilterForColorModel.
  uint8_t ToIndex() const
  {
    return (uint8_t(mColorSpace) << 1) + uint8_t(mAlphaModel);
  }

  ColorSpace mColorSpace;
  AlphaModel mAlphaModel;
};

enum class PrimitiveType {
  Empty = 0,
  Blend,
  Morphology,
  ColorMatrix,
  Flood,
  Tile,
  ComponentTransfer,
  ConvolveMatrix,
  Offset,
  DisplacementMap,
  Turbulence,
  Composite,
  Merge,
  Image,
  GaussianBlur,
  DropShadow,
  DiffuseLighting,
  SpecularLighting,
  ToAlpha,
  Max
};

/**
 * A data structure to carry attributes for a given primitive that's part of a
 * filter. Will be serializable via IPDL, so it must not contain complex
 * functionality.
 * Used as part of a FilterDescription.
 */
class FilterPrimitiveDescription final {
public:
  enum {
    kPrimitiveIndexSourceGraphic = -1,
    kPrimitiveIndexSourceAlpha = -2,
    kPrimitiveIndexFillPaint = -3,
    kPrimitiveIndexStrokePaint = -4
  };

  FilterPrimitiveDescription();
  explicit FilterPrimitiveDescription(PrimitiveType aType);
  FilterPrimitiveDescription(const FilterPrimitiveDescription& aOther);
  FilterPrimitiveDescription& operator=(const FilterPrimitiveDescription& aOther);

  PrimitiveType Type() const { return mType; }
  void SetType(PrimitiveType aType) { mType = aType; }
  const AttributeMap& Attributes() const { return mAttributes; }
  AttributeMap& Attributes() { return mAttributes; }

  IntRect PrimitiveSubregion() const { return mFilterPrimitiveSubregion; }
  IntRect FilterSpaceBounds() const { return mFilterSpaceBounds; }
  bool IsTainted() const { return mIsTainted; }

  size_t NumberOfInputs() const { return mInputPrimitives.Length(); }
  int32_t InputPrimitiveIndex(size_t aInputIndex) const
  {
    return aInputIndex < mInputPrimitives.Length() ?
      mInputPrimitives[aInputIndex] : 0;
  }

  ColorSpace InputColorSpace(size_t aInputIndex) const
  {
    return aInputIndex < mInputColorSpaces.Length() ?
      mInputColorSpaces[aInputIndex] : ColorSpace();
  }

  ColorSpace OutputColorSpace() const { return mOutputColorSpace; }

  void SetPrimitiveSubregion(const IntRect& aRect)
  {
    mFilterPrimitiveSubregion = aRect;
  }

  void SetFilterSpaceBounds(const IntRect& aRect)
  {
    mFilterSpaceBounds = aRect;
  }

  void SetIsTainted(bool aIsTainted)
  {
    mIsTainted = aIsTainted;
  }

  void SetInputPrimitive(size_t aInputIndex, int32_t aInputPrimitiveIndex)
  {
    mInputPrimitives.EnsureLengthAtLeast(aInputIndex + 1);
    mInputPrimitives[aInputIndex] = aInputPrimitiveIndex;
  }

  void SetInputColorSpace(size_t aInputIndex, ColorSpace aColorSpace)
  {
    mInputColorSpaces.EnsureLengthAtLeast(aInputIndex + 1);
    mInputColorSpaces[aInputIndex] = aColorSpace;
  }

  void SetOutputColorSpace(const ColorSpace& aColorSpace)
  {
    mOutputColorSpace = aColorSpace;
  }

  bool operator==(const FilterPrimitiveDescription& aOther) const;
  bool operator!=(const FilterPrimitiveDescription& aOther) const
  {
    return !(*this == aOther);
  }

private:
  PrimitiveType mType;
  AttributeMap mAttributes;
  nsTArray<int32_t> mInputPrimitives;
  IntRect mFilterPrimitiveSubregion;
  IntRect mFilterSpaceBounds;
  nsTArray<ColorSpace> mInputColorSpaces;
  ColorSpace mOutputColorSpace;
  bool mIsTainted;
};

/**
 * A data structure that contains one or more FilterPrimitiveDescriptions.
 * Designed to be serializable via IPDL, so it must not contain complex
 * functionality.
 */
struct FilterDescription final {
  FilterDescription() {}
  explicit FilterDescription(const nsTArray<FilterPrimitiveDescription>& aPrimitives)
   : mPrimitives(aPrimitives)
  {}

  bool operator==(const FilterDescription& aOther) const;
  bool operator!=(const FilterDescription& aOther) const
  {
    return !(*this == aOther);
  }

  nsTArray<FilterPrimitiveDescription> mPrimitives;
};

/**
 * The methods of this class are not on FilterDescription because
 * FilterDescription is designed as a simple value holder that can be used
 * on any thread.
 */
class FilterSupport {
public:

  /**
   * Draw the filter described by aFilter. All rect parameters are in filter
   * space coordinates. aRenderRect specifies the part of the filter output
   * that will be drawn at (0, 0) into the draw target aDT, subject to the
   * current transform on aDT but with no additional scaling.
   * The source surfaces must match their corresponding rect in size.
   * aAdditionalImages carries the images that are referenced by the
   * eImageInputIndex attribute on any image primitives in the filter.
   */
  static void
  RenderFilterDescription(DrawTarget* aDT,
                          const FilterDescription& aFilter,
                          const Rect& aRenderRect,
                          SourceSurface* aSourceGraphic,
                          const IntRect& aSourceGraphicRect,
                          SourceSurface* aFillPaint,
                          const IntRect& aFillPaintRect,
                          SourceSurface* aStrokePaint,
                          const IntRect& aStrokePaintRect,
                          nsTArray<RefPtr<SourceSurface>>& aAdditionalImages,
                          const Point& aDestPoint,
                          const DrawOptions& aOptions = DrawOptions());

  /**
   * Computes the region that changes in the filter output due to a change in
   * input.  This is primarily needed when an individual piece of content inside
   * a filtered container element changes.
   */
  static nsIntRegion
  ComputeResultChangeRegion(const FilterDescription& aFilter,
                            const nsIntRegion& aSourceGraphicChange,
                            const nsIntRegion& aFillPaintChange,
                            const nsIntRegion& aStrokePaintChange);

  /**
   * Computes the regions that need to be supplied in the filter inputs when
   * painting aResultNeededRegion of the filter output.
   */
  static void
  ComputeSourceNeededRegions(const FilterDescription& aFilter,
                             const nsIntRegion& aResultNeededRegion,
                             nsIntRegion& aSourceGraphicNeededRegion,
                             nsIntRegion& aFillPaintNeededRegion,
                             nsIntRegion& aStrokePaintNeededRegion);

  /**
   * Computes the size of the filter output.
   */
  static nsIntRegion
  ComputePostFilterExtents(const FilterDescription& aFilter,
                           const nsIntRegion& aSourceGraphicExtents);

  /**
   * Computes the size of a single FilterPrimitiveDescription's output given a
   * set of input extents.
   */
  static nsIntRegion
  PostFilterExtentsForPrimitive(const FilterPrimitiveDescription& aDescription,
                                const nsTArray<nsIntRegion>& aInputExtents);
};

} // namespace gfx
} // namespace mozilla

#endif // __FilterSupport_h