Add m-esr52 at 52.6.0

1 files changed, 360 insertions, 0 deletions

diff --git a/gfx/2d/SVGTurbulenceRenderer-inl.h b/gfx/2d/SVGTurbulenceRenderer-inl.h
new file mode 100644
index 000000000..7b18903e8
--- /dev/null
+++ b/gfx/2d/SVGTurbulenceRenderer-inl.h
@@ -0,0 +1,360 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * 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/. */
+
+#include "2D.h"
+#include "Filters.h"
+#include "SIMD.h"
+
+namespace mozilla {
+namespace gfx {
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+class SVGTurbulenceRenderer
+{
+public:
+  SVGTurbulenceRenderer(const Size &aBaseFrequency, int32_t aSeed,
+                        int aNumOctaves, const Rect &aTileRect);
+
+  already_AddRefed<DataSourceSurface> Render(const IntSize &aSize, const Point &aOffset) const;
+
+private:
+  /* The turbulence calculation code is an adapted version of what
+     appears in the SVG 1.1 specification:
+         http://www.w3.org/TR/SVG11/filters.html#feTurbulence
+  */
+
+  struct StitchInfo {
+    int32_t width;     // How much to subtract to wrap for stitching.
+    int32_t height;
+    int32_t wrapX;     // Minimum value to wrap.
+    int32_t wrapY;
+  };
+
+  const static int sBSize = 0x100;
+  const static int sBM = 0xff;
+  void InitFromSeed(int32_t aSeed);
+  void AdjustBaseFrequencyForStitch(const Rect &aTileRect);
+  IntPoint AdjustForStitch(IntPoint aLatticePoint, const StitchInfo& aStitchInfo) const;
+  StitchInfo CreateStitchInfo(const Rect &aTileRect) const;
+  f32x4_t Noise2(Point aVec, const StitchInfo& aStitchInfo) const;
+  i32x4_t Turbulence(const Point &aPoint) const;
+  Point EquivalentNonNegativeOffset(const Point &aOffset) const;
+
+  Size mBaseFrequency;
+  int32_t mNumOctaves;
+  StitchInfo mStitchInfo;
+  bool mStitchable;
+  TurbulenceType mType;
+  uint8_t mLatticeSelector[sBSize];
+  f32x4_t mGradient[sBSize][2];
+};
+
+namespace {
+
+struct RandomNumberSource
+{
+  explicit RandomNumberSource(int32_t aSeed) : mLast(SetupSeed(aSeed)) {}
+  int32_t Next() { mLast = Random(mLast); return mLast; }
+
+private:
+  static const int32_t RAND_M = 2147483647; /* 2**31 - 1 */
+  static const int32_t RAND_A = 16807;      /* 7**5; primitive root of m */
+  static const int32_t RAND_Q = 127773;     /* m / a */
+  static const int32_t RAND_R = 2836;       /* m % a */
+
+  /* Produces results in the range [1, 2**31 - 2].
+     Algorithm is: r = (a * r) mod m
+     where a = 16807 and m = 2**31 - 1 = 2147483647
+     See [Park & Miller], CACM vol. 31 no. 10 p. 1195, Oct. 1988
+     To test: the algorithm should produce the result 1043618065
+     as the 10,000th generated number if the original seed is 1.
+  */
+
+  static int32_t
+  SetupSeed(int32_t aSeed) {
+    if (aSeed <= 0)
+      aSeed = -(aSeed % (RAND_M - 1)) + 1;
+    if (aSeed > RAND_M - 1)
+      aSeed = RAND_M - 1;
+    return aSeed;
+  }
+
+  static int32_t
+  Random(int32_t aSeed)
+  {
+    int32_t result = RAND_A * (aSeed % RAND_Q) - RAND_R * (aSeed / RAND_Q);
+    if (result <= 0)
+      result += RAND_M;
+    return result;
+  }
+
+  int32_t mLast;
+};
+
+} // unnamed namespace
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::SVGTurbulenceRenderer(const Size &aBaseFrequency, int32_t aSeed,
+                                                            int aNumOctaves, const Rect &aTileRect)
+ : mBaseFrequency(aBaseFrequency)
+ , mNumOctaves(aNumOctaves)
+{
+  InitFromSeed(aSeed);
+  if (Stitch) {
+    AdjustBaseFrequencyForStitch(aTileRect);
+    mStitchInfo = CreateStitchInfo(aTileRect);
+  }
+}
+
+template<typename T>
+static void
+Swap(T& a, T& b) {
+  T c = a;
+  a = b;
+  b = c;
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+void
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::InitFromSeed(int32_t aSeed)
+{
+  RandomNumberSource rand(aSeed);
+
+  float gradient[4][sBSize][2];
+  for (int32_t k = 0; k < 4; k++) {
+    for (int32_t i = 0; i < sBSize; i++) {
+      float a, b;
+      do {
+        a = float((rand.Next() % (sBSize + sBSize)) - sBSize) / sBSize;
+        b = float((rand.Next() % (sBSize + sBSize)) - sBSize) / sBSize;
+      } while (a == 0 && b == 0);
+      float s = sqrt(a * a + b * b);
+      gradient[k][i][0] = a / s;
+      gradient[k][i][1] = b / s;
+    }
+  }
+
+  for (int32_t i = 0; i < sBSize; i++) {
+    mLatticeSelector[i] = i;
+  }
+  for (int32_t i1 = sBSize - 1; i1 > 0; i1--) {
+    int32_t i2 = rand.Next() % sBSize;
+    Swap(mLatticeSelector[i1], mLatticeSelector[i2]);
+  }
+
+  for (int32_t i = 0; i < sBSize; i++) {
+    // Contrary to the code in the spec, we build the first lattice selector
+    // lookup into mGradient so that we don't need to do it again for every
+    // pixel.
+    // We also change the order of the gradient indexing so that we can process
+    // all four color channels at the same time.
+    uint8_t j = mLatticeSelector[i];
+    mGradient[i][0] = simd::FromF32<f32x4_t>(gradient[2][j][0], gradient[1][j][0],
+                                             gradient[0][j][0], gradient[3][j][0]);
+    mGradient[i][1] = simd::FromF32<f32x4_t>(gradient[2][j][1], gradient[1][j][1],
+                                             gradient[0][j][1], gradient[3][j][1]);
+  }
+}
+
+// Adjust aFreq such that aLength * AdjustForLength(aFreq, aLength) is integer
+// and as close to aLength * aFreq as possible.
+static inline float
+AdjustForLength(float aFreq, float aLength)
+{
+  float lowFreq = floor(aLength * aFreq) / aLength;
+  float hiFreq = ceil(aLength * aFreq) / aLength;
+  if (aFreq / lowFreq < hiFreq / aFreq) {
+    return lowFreq;
+  }
+  return hiFreq;
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+void
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::AdjustBaseFrequencyForStitch(const Rect &aTileRect)
+{
+  mBaseFrequency = Size(AdjustForLength(mBaseFrequency.width, aTileRect.width),
+                        AdjustForLength(mBaseFrequency.height, aTileRect.height));
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+typename SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::StitchInfo
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::CreateStitchInfo(const Rect &aTileRect) const
+{
+  StitchInfo stitch;
+  stitch.width = int32_t(floorf(aTileRect.width * mBaseFrequency.width + 0.5f));
+  stitch.height = int32_t(floorf(aTileRect.height * mBaseFrequency.height + 0.5f));
+  stitch.wrapX = int32_t(aTileRect.x * mBaseFrequency.width) + stitch.width;
+  stitch.wrapY = int32_t(aTileRect.y * mBaseFrequency.height) + stitch.height;
+  return stitch;
+}
+
+static MOZ_ALWAYS_INLINE Float
+SCurve(Float t)
+{
+  return t * t * (3 - 2 * t);
+}
+
+static MOZ_ALWAYS_INLINE Point
+SCurve(Point t)
+{
+  return Point(SCurve(t.x), SCurve(t.y));
+}
+
+template<typename f32x4_t>
+static MOZ_ALWAYS_INLINE f32x4_t
+BiMix(const f32x4_t& aa, const f32x4_t& ab,
+      const f32x4_t& ba, const f32x4_t& bb, Point s)
+{
+  return simd::MixF32(simd::MixF32(aa, ab, s.x),
+                      simd::MixF32(ba, bb, s.x), s.y);
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+IntPoint
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::AdjustForStitch(IntPoint aLatticePoint,
+                                                      const StitchInfo& aStitchInfo) const
+{
+  if (Stitch) {
+    if (aLatticePoint.x >= aStitchInfo.wrapX) {
+      aLatticePoint.x -= aStitchInfo.width;
+    }
+    if (aLatticePoint.y >= aStitchInfo.wrapY) {
+      aLatticePoint.y -= aStitchInfo.height;
+    }
+  }
+  return aLatticePoint;
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+f32x4_t
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::Noise2(Point aVec, const StitchInfo& aStitchInfo) const
+{
+  // aVec is guaranteed to be non-negative, so casting to int32_t always
+  // rounds towards negative infinity.
+  IntPoint topLeftLatticePoint(int32_t(aVec.x), int32_t(aVec.y));
+  Point r = aVec - topLeftLatticePoint; // fractional offset
+
+  IntPoint b0 = AdjustForStitch(topLeftLatticePoint, aStitchInfo);
+  IntPoint b1 = AdjustForStitch(b0 + IntPoint(1, 1), aStitchInfo);
+
+  uint8_t i = mLatticeSelector[b0.x & sBM];
+  uint8_t j = mLatticeSelector[b1.x & sBM];
+
+  const f32x4_t* qua = mGradient[(i + b0.y) & sBM];
+  const f32x4_t* qub = mGradient[(i + b1.y) & sBM];
+  const f32x4_t* qva = mGradient[(j + b0.y) & sBM];
+  const f32x4_t* qvb = mGradient[(j + b1.y) & sBM];
+
+  return BiMix(simd::WSumF32(qua[0], qua[1], r.x, r.y),
+               simd::WSumF32(qva[0], qva[1], r.x - 1.f, r.y),
+               simd::WSumF32(qub[0], qub[1], r.x, r.y - 1.f),
+               simd::WSumF32(qvb[0], qvb[1], r.x - 1.f, r.y - 1.f),
+               SCurve(r));
+}
+
+template<typename f32x4_t, typename i32x4_t, typename u8x16_t>
+static inline i32x4_t
+ColorToBGRA(f32x4_t aUnscaledUnpreFloat)
+{
+  // Color is an unpremultiplied float vector where 1.0f means white. We will
+  // convert it into an integer vector where 255 means white.
+  f32x4_t alpha = simd::SplatF32<3>(aUnscaledUnpreFloat);
+  f32x4_t scaledUnpreFloat = simd::MulF32(aUnscaledUnpreFloat, simd::FromF32<f32x4_t>(255));
+  i32x4_t scaledUnpreInt = simd::F32ToI32(scaledUnpreFloat);
+
+  // Multiply all channels with alpha.
+  i32x4_t scaledPreInt = simd::F32ToI32(simd::MulF32(scaledUnpreFloat, alpha));
+
+  // Use the premultiplied color channels and the unpremultiplied alpha channel.
+  i32x4_t alphaMask = simd::From32<i32x4_t>(0, 0, 0, -1);
+  return simd::Pick(alphaMask, scaledPreInt, scaledUnpreInt);
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+i32x4_t
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::Turbulence(const Point &aPoint) const
+{
+  StitchInfo stitchInfo = mStitchInfo;
+  f32x4_t sum = simd::FromF32<f32x4_t>(0);
+  Point vec(aPoint.x * mBaseFrequency.width, aPoint.y * mBaseFrequency.height);
+  f32x4_t ratio = simd::FromF32<f32x4_t>(1);
+
+  for (int octave = 0; octave < mNumOctaves; octave++) {
+    f32x4_t thisOctave = Noise2(vec, stitchInfo);
+    if (Type == TURBULENCE_TYPE_TURBULENCE) {
+      thisOctave = simd::AbsF32(thisOctave);
+    }
+    sum = simd::AddF32(sum, simd::DivF32(thisOctave, ratio));
+    vec = vec * 2;
+    ratio = simd::MulF32(ratio, simd::FromF32<f32x4_t>(2));
+
+    if (Stitch) {
+      stitchInfo.width *= 2;
+      stitchInfo.wrapX *= 2;
+      stitchInfo.height *= 2;
+      stitchInfo.wrapY *= 2;
+    }
+  }
+
+  if (Type == TURBULENCE_TYPE_FRACTAL_NOISE) {
+    sum = simd::DivF32(simd::AddF32(sum, simd::FromF32<f32x4_t>(1)), simd::FromF32<f32x4_t>(2));
+  }
+  return ColorToBGRA<f32x4_t,i32x4_t,u8x16_t>(sum);
+}
+
+static inline Float
+MakeNonNegative(Float aValue, Float aIncrementSize)
+{
+  if (aValue >= 0) {
+    return aValue;
+  }
+  return aValue + ceilf(-aValue / aIncrementSize) * aIncrementSize;
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+Point
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::EquivalentNonNegativeOffset(const Point &aOffset) const
+{
+  Size basePeriod = Stitch ? Size(mStitchInfo.width, mStitchInfo.height) :
+                             Size(sBSize, sBSize);
+  Size repeatingSize(basePeriod.width / mBaseFrequency.width,
+                     basePeriod.height / mBaseFrequency.height);
+  return Point(MakeNonNegative(aOffset.x, repeatingSize.width),
+               MakeNonNegative(aOffset.y, repeatingSize.height));
+}
+
+template<TurbulenceType Type, bool Stitch, typename f32x4_t, typename i32x4_t, typename u8x16_t>
+already_AddRefed<DataSourceSurface>
+SVGTurbulenceRenderer<Type,Stitch,f32x4_t,i32x4_t,u8x16_t>::Render(const IntSize &aSize, const Point &aOffset) const
+{
+  RefPtr<DataSourceSurface> target =
+    Factory::CreateDataSourceSurface(aSize, SurfaceFormat::B8G8R8A8);
+  if (!target) {
+    return nullptr;
+  }
+
+  uint8_t* targetData = target->GetData();
+  uint32_t stride = target->Stride();
+
+  Point startOffset = EquivalentNonNegativeOffset(aOffset);
+
+  for (int32_t y = 0; y < aSize.height; y++) {
+    for (int32_t x = 0; x < aSize.width; x += 4) {
+      int32_t targIndex = y * stride + x * 4;
+      i32x4_t a = Turbulence(startOffset + Point(x, y));
+      i32x4_t b = Turbulence(startOffset + Point(x + 1, y));
+      i32x4_t c = Turbulence(startOffset + Point(x + 2, y));
+      i32x4_t d = Turbulence(startOffset + Point(x + 3, y));
+      u8x16_t result1234 = simd::PackAndSaturate32To8(a, b, c, d);
+      simd::Store8(&targetData[targIndex], result1234);
+    }
+  }
+
+  return target.forget();
+}
+
+} // namespace gfx
+} // namespace mozilla