/src/mozilla-central/gfx/2d/Tools.h

Source (jump to first uncovered line)
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 MOZILLA_GFX_TOOLS_H_
#define MOZILLA_GFX_TOOLS_H_

#include "mozilla/CheckedInt.h"
#include "mozilla/MemoryReporting.h" // for MallocSizeOf
#include "mozilla/Move.h"
#include "mozilla/TypeTraits.h"
#include "Types.h"
#include "Point.h"
#include <math.h>

namespace mozilla {
namespace gfx {

static inline bool
IsOperatorBoundByMask(CompositionOp aOp) {
  switch (aOp) {
  case CompositionOp::OP_IN:
  case CompositionOp::OP_OUT:
  case CompositionOp::OP_DEST_IN:
  case CompositionOp::OP_DEST_ATOP:
  case CompositionOp::OP_SOURCE:
    return false;
  default:
    return true;
  }
}

template <class T>
struct ClassStorage
{
  char bytes[sizeof(T)];

  const T *addr() const { return (const T *)bytes; }
  T *addr() { return (T *)(void *)bytes; }
};

static inline bool
FuzzyEqual(Float aA, Float aB, Float aErr)
{
  if ((aA + aErr >= aB) && (aA - aErr <= aB)) {
    return true;
  }
  return false;
}

static inline void
NudgeToInteger(float *aVal)
{
  float r = floorf(*aVal + 0.5f);
  // The error threshold should be proportional to the rounded value. This
  // bounds the relative error introduced by the nudge operation. However,
  // when the rounded value is 0, the error threshold can't be proportional
  // to the rounded value (we'd never round), so we just choose the same
  // threshold as for a rounded value of 1.
  if (FuzzyEqual(r, *aVal, r == 0.0f ? 1e-6f : fabs(r*1e-6f))) {
    *aVal = r;
  }
}

static inline void
NudgeToInteger(float *aVal, float aErr)
{
  float r = floorf(*aVal + 0.5f);
  if (FuzzyEqual(r, *aVal, aErr)) {
    *aVal = r;
  }
}

static inline void
NudgeToInteger(double *aVal)
{
  float f = float(*aVal);
  NudgeToInteger(&f);
  *aVal = f;
}

static inline Float
Distance(Point aA, Point aB)
{
  return hypotf(aB.x - aA.x, aB.y - aA.y);
}

static inline int
BytesPerPixel(SurfaceFormat aFormat)
{
  switch (aFormat) {
  case SurfaceFormat::A8:
    return 1;
  case SurfaceFormat::R5G6B5_UINT16:
  case SurfaceFormat::A16:
    return 2;
  case SurfaceFormat::R8G8B8:
  case SurfaceFormat::B8G8R8:
    return 3;
  case SurfaceFormat::HSV:
  case SurfaceFormat::Lab:
    return 3 * sizeof(float);
  case SurfaceFormat::Depth:
    return sizeof(uint16_t);
  default:
    return 4;
  }
}

static inline SurfaceFormat
SurfaceFormatForAlphaBitDepth(uint32_t aBitDepth)
{
  if (aBitDepth == 8) {
    return SurfaceFormat::A8;
  } else if (aBitDepth == 10 ||
             aBitDepth == 12) {
    return SurfaceFormat::A16;
  }
  MOZ_ASSERT_UNREACHABLE("Unsupported alpha bit depth");
  return SurfaceFormat::UNKNOWN;
}

static inline bool
IsOpaqueFormat(SurfaceFormat aFormat) {
  switch (aFormat) {
    case SurfaceFormat::B8G8R8X8:
    case SurfaceFormat::R8G8B8X8:
    case SurfaceFormat::X8R8G8B8:
    case SurfaceFormat::YUV:
    case SurfaceFormat::NV12:
    case SurfaceFormat::YUV422:
    case SurfaceFormat::R5G6B5_UINT16:
      return true;
    default:
      return false;
  }
}

template<typename T, int alignment = 16>
struct AlignedArray
{
  typedef T value_type;

  AlignedArray()
    : mPtr(nullptr)
    , mStorage(nullptr)
    , mCount(0)
  {
  }

  explicit MOZ_ALWAYS_INLINE AlignedArray(size_t aCount, bool aZero = false)
    : mPtr(nullptr)
    , mStorage(nullptr)
    , mCount(0)
  {
    Realloc(aCount, aZero);
  }

  MOZ_ALWAYS_INLINE ~AlignedArray()
  {
    Dealloc();
  }

  void Dealloc()
  {
    // If we fail this assert we'll need to uncomment the loop below to make
    // sure dtors are properly invoked. If we do that, we should check that the
    // comment about compiler dead code elimination is in fact true for all the
    // compilers that we care about.
    static_assert(mozilla::IsPod<T>::value,
                  "Destructors must be invoked for this type");
#if 0
    for (size_t i = 0; i < mCount; ++i) {
      // Since we used the placement |operator new| function to construct the
      // elements of this array we need to invoke their destructors manually.
      // For types where the destructor does nothing the compiler's dead code
      // elimination step should optimize this loop away.
      mPtr[i].~T();
    }
#endif

    free(mStorage);
    mStorage = nullptr;
    mPtr = nullptr;
  }

  MOZ_ALWAYS_INLINE void Realloc(size_t aCount, bool aZero = false)
  {
    free(mStorage);
    CheckedInt32 storageByteCount =
      CheckedInt32(sizeof(T)) * aCount + (alignment - 1);
    if (!storageByteCount.isValid()) {
      mStorage = nullptr;
      mPtr = nullptr;
      mCount = 0;
      return;
    }
    // We don't create an array of T here, since we don't want ctors to be
    // invoked at the wrong places if we realign below.
    if (aZero) {
      // calloc can be more efficient than new[] for large chunks,
      // so we use calloc/malloc/free for everything.
      mStorage = static_cast<uint8_t *>(calloc(1, storageByteCount.value()));
    } else {
      mStorage = static_cast<uint8_t *>(malloc(storageByteCount.value()));
    }
    if (!mStorage) {
      mStorage = nullptr;
      mPtr = nullptr;
      mCount = 0;
      return;
    }
    if (uintptr_t(mStorage) % alignment) {
      // Our storage does not start at a <alignment>-byte boundary. Make sure mPtr does!
      mPtr = (T*)(uintptr_t(mStorage) + alignment - (uintptr_t(mStorage) % alignment));
    } else {
      mPtr = (T*)(mStorage);
    }
    // Now that mPtr is pointing to the aligned position we can use placement
    // |operator new| to invoke any ctors at the correct positions. For types
    // that have a no-op default constructor the compiler's dead code
    // elimination step should optimize this away.
    mPtr = new (mPtr) T[aCount];
    mCount = aCount;
  }

  void Swap(AlignedArray<T, alignment>& aOther)
  {
    mozilla::Swap(mPtr, aOther.mPtr);
    mozilla::Swap(mStorage, aOther.mStorage);
    mozilla::Swap(mCount, aOther.mCount);
  }

  size_t
  HeapSizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
  {
    return aMallocSizeOf(mStorage);
  }

  MOZ_ALWAYS_INLINE operator T*()
  {
    return mPtr;
  }

  T *mPtr;

private:
  uint8_t *mStorage;
  size_t mCount;
};

/**
 * Returns aWidth * aBytesPerPixel increased, if necessary, so that it divides
 * exactly into |alignment|.
 *
 * Note that currently |alignment| must be a power-of-2. If for some reason we
 * want to support NPOT alignment we can revert back to this functions old
 * implementation.
 */
template<int alignment>
int32_t GetAlignedStride(int32_t aWidth, int32_t aBytesPerPixel)
{
  static_assert(alignment > 0 && (alignment & (alignment-1)) == 0,
                "This implementation currently require power-of-two alignment");
  const int32_t mask = alignment - 1;
  CheckedInt32 stride = CheckedInt32(aWidth) * CheckedInt32(aBytesPerPixel) + CheckedInt32(mask);
  if (stride.isValid()) {
    return stride.value() & ~mask;
  }
  return 0;
}

} // namespace gfx
} // namespace mozilla

#endif /* MOZILLA_GFX_TOOLS_H_ */

Coverage Report

Created: 2018-09-25 14:53

Line	Count	Source (jump to first uncovered line)
1		/* -- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -- */
2		/* vim: set ts=8 sts=2 et sw=2 tw=80: */
3		/* This Source Code Form is subject to the terms of the Mozilla Public
4		* License, v. 2.0. If a copy of the MPL was not distributed with this
5		* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7		#ifndef MOZILLA_GFX_TOOLS_H_
8		#define MOZILLA_GFX_TOOLS_H_
9
10		#include "mozilla/CheckedInt.h"
11		#include "mozilla/MemoryReporting.h" // for MallocSizeOf
12		#include "mozilla/Move.h"
13		#include "mozilla/TypeTraits.h"
14		#include "Types.h"
15		#include "Point.h"
16		#include <math.h>
17
18		namespace mozilla {
19		namespace gfx {
20
21		static inline bool
22	0	IsOperatorBoundByMask(CompositionOp aOp) {
23	0	switch (aOp) {
24	0	case CompositionOp::OP_IN:
25	0	case CompositionOp::OP_OUT:
26	0	case CompositionOp::OP_DEST_IN:
27	0	case CompositionOp::OP_DEST_ATOP:
28	0	case CompositionOp::OP_SOURCE:
29	0	return false;
30	0	default:
31	0	return true;
32	0	}
33	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: Factory.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::IsOperatorBoundByMask(mozilla::gfx::CompositionOp)
34
35		template <class T>
36		struct ClassStorage
37		{
38		char bytes[sizeof(T)];
39
40		const T addr() const { return (const T )bytes; }
41	0	T addr() { return (T )(void *)bytes; }
42		};
43
44		static inline bool
45		FuzzyEqual(Float aA, Float aB, Float aErr)
46	0	{
47	0	if ((aA + aErr >= aB) && (aA - aErr <= aB)) {
48	0	return true;
49	0	}
50	0	return false;
51	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: Factory.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: Unified_cpp_gfx_2d0.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::FuzzyEqual(float, float, float) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::FuzzyEqual(float, float, float)
52
53		static inline void
54		NudgeToInteger(float *aVal)
55	0	{
56	0	float r = floorf(*aVal + 0.5f);
57	0	// The error threshold should be proportional to the rounded value. This
58	0	// bounds the relative error introduced by the nudge operation. However,
59	0	// when the rounded value is 0, the error threshold can't be proportional
60	0	// to the rounded value (we'd never round), so we just choose the same
61	0	// threshold as for a rounded value of 1.
62	0	if (FuzzyEqual(r, aVal, r == 0.0f ? 1e-6f : fabs(r1e-6f))) {
63	0	*aVal = r;
64	0	}
65	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: Factory.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: Unified_cpp_gfx_2d0.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::NudgeToInteger(float) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::NudgeToInteger(float*)
66
67		static inline void
68		NudgeToInteger(float *aVal, float aErr)
69	0	{
70	0	float r = floorf(*aVal + 0.5f);
71	0	if (FuzzyEqual(r, *aVal, aErr)) {
72	0	*aVal = r;
73	0	}
74	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: Factory.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: Unified_cpp_gfx_2d0.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::NudgeToInteger(float, float) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::NudgeToInteger(float*, float)
75
76		static inline void
77		NudgeToInteger(double *aVal)
78	0	{
79	0	float f = float(*aVal);
80	0	NudgeToInteger(&f);
81	0	*aVal = f;
82	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: Factory.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: Unified_cpp_gfx_2d0.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::NudgeToInteger(double) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::NudgeToInteger(double*)
83
84		static inline Float
85		Distance(Point aA, Point aB)
86	0	{
87	0	return hypotf(aB.x - aA.x, aB.y - aA.y);
88	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: Factory.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: Unified_cpp_gfx_2d0.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::Distance(mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>, mozilla::gfx::PointTyped<mozilla::gfx::UnknownUnits, float>)
89
90		static inline int
91		BytesPerPixel(SurfaceFormat aFormat)
92	0	{
93	0	switch (aFormat) {
94	0	case SurfaceFormat::A8:
95	0	return 1;
96	0	case SurfaceFormat::R5G6B5_UINT16:
97	0	case SurfaceFormat::A16:
98	0	return 2;
99	0	case SurfaceFormat::R8G8B8:
100	0	case SurfaceFormat::B8G8R8:
101	0	return 3;
102	0	case SurfaceFormat::HSV:
103	0	case SurfaceFormat::Lab:
104	0	return 3 * sizeof(float);
105	0	case SurfaceFormat::Depth:
106	0	return sizeof(uint16_t);
107	0	default:
108	0	return 4;
109	0	}
110	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::BytesPerPixel(mozilla::gfx::SurfaceFormat)
111
112		static inline SurfaceFormat
113		SurfaceFormatForAlphaBitDepth(uint32_t aBitDepth)
114	0	{
115	0	if (aBitDepth == 8) {
116	0	return SurfaceFormat::A8;
117	0	} else if (aBitDepth == 10 \|\|
118	0	aBitDepth == 12) {
119	0	return SurfaceFormat::A16;
120	0	}
121	0	MOZ_ASSERT_UNREACHABLE("Unsupported alpha bit depth");
122	0	return SurfaceFormat::UNKNOWN;
123	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: Factory.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: Unified_cpp_gfx_2d0.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::SurfaceFormatForAlphaBitDepth(unsigned int)
124
125		static inline bool
126	0	IsOpaqueFormat(SurfaceFormat aFormat) {
127	0	switch (aFormat) {
128	0	case SurfaceFormat::B8G8R8X8:
129	0	case SurfaceFormat::R8G8B8X8:
130	0	case SurfaceFormat::X8R8G8B8:
131	0	case SurfaceFormat::YUV:
132	0	case SurfaceFormat::NV12:
133	0	case SurfaceFormat::YUV422:
134	0	case SurfaceFormat::R5G6B5_UINT16:
135	0	return true;
136	0	default:
137	0	return false;
138	0	}
139	0	} Unexecuted instantiation: ConvolutionFilter.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: DrawTargetSkia.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: Factory.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: FilterProcessingSSE2.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: InlineTranslator.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: NativeFontResourceFreeType.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: PathSkia.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: SourceSurfaceSkia.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: UnscaledFontFreeType.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: Unified_cpp_gfx_2d0.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: Unified_cpp_gfx_2d1.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: Unified_cpp_gfx_2d2.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat) Unexecuted instantiation: Unified_cpp_dom_ipc0.cpp:mozilla::gfx::IsOpaqueFormat(mozilla::gfx::SurfaceFormat)
140
141		template<typename T, int alignment = 16>
142		struct AlignedArray
143		{
144		typedef T value_type;
145
146		AlignedArray()
147		: mPtr(nullptr)
148		, mStorage(nullptr)
149		, mCount(0)
150	0	{
151	0	}
152
153		explicit MOZ_ALWAYS_INLINE AlignedArray(size_t aCount, bool aZero = false)
154		: mPtr(nullptr)
155		, mStorage(nullptr)
156		, mCount(0)
157	0	{
158	0	Realloc(aCount, aZero);
159	0	}
160
161		MOZ_ALWAYS_INLINE ~AlignedArray()
162	0	{
163	0	Dealloc();
164	0	} Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned int, 16>::~AlignedArray() Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned char, 16>::~AlignedArray()
165
166		void Dealloc()
167	0	{
168	0	// If we fail this assert we'll need to uncomment the loop below to make
169	0	// sure dtors are properly invoked. If we do that, we should check that the
170	0	// comment about compiler dead code elimination is in fact true for all the
171	0	// compilers that we care about.
172	0	static_assert(mozilla::IsPod<T>::value,
173	0	"Destructors must be invoked for this type");
174		#if 0
175		for (size_t i = 0; i < mCount; ++i) {
176		// Since we used the placement \|operator new\| function to construct the
177		// elements of this array we need to invoke their destructors manually.
178		// For types where the destructor does nothing the compiler's dead code
179		// elimination step should optimize this loop away.
180		mPtr[i].~T();
181		}
182		#endif
183
184	0	free(mStorage);
185	0	mStorage = nullptr;
186	0	mPtr = nullptr;
187	0	} Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned char, 16>::Dealloc() Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned int, 16>::Dealloc()
188
189		MOZ_ALWAYS_INLINE void Realloc(size_t aCount, bool aZero = false)
190	0	{
191	0	free(mStorage);
192	0	CheckedInt32 storageByteCount =
193	0	CheckedInt32(sizeof(T)) * aCount + (alignment - 1);
194	0	if (!storageByteCount.isValid()) {
195	0	mStorage = nullptr;
196	0	mPtr = nullptr;
197	0	mCount = 0;
198	0	return;
199	0	}
200	0	// We don't create an array of T here, since we don't want ctors to be
201	0	// invoked at the wrong places if we realign below.
202	0	if (aZero) {
203	0	// calloc can be more efficient than new[] for large chunks,
204	0	// so we use calloc/malloc/free for everything.
205	0	mStorage = static_cast<uint8_t *>(calloc(1, storageByteCount.value()));
206	0	} else {
207	0	mStorage = static_cast<uint8_t *>(malloc(storageByteCount.value()));
208	0	}
209	0	if (!mStorage) {
210	0	mStorage = nullptr;
211	0	mPtr = nullptr;
212	0	mCount = 0;
213	0	return;
214	0	}
215	0	if (uintptr_t(mStorage) % alignment) {
216	0	// Our storage does not start at a <alignment>-byte boundary. Make sure mPtr does!
217	0	mPtr = (T*)(uintptr_t(mStorage) + alignment - (uintptr_t(mStorage) % alignment));
218	0	} else {
219	0	mPtr = (T*)(mStorage);
220	0	}
221	0	// Now that mPtr is pointing to the aligned position we can use placement
222	0	// \|operator new\| to invoke any ctors at the correct positions. For types
223	0	// that have a no-op default constructor the compiler's dead code
224	0	// elimination step should optimize this away.
225	0	mPtr = new (mPtr) T[aCount];
226	0	mCount = aCount;
227	0	} Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned int, 16>::Realloc(unsigned long, bool) Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned char, 16>::Realloc(unsigned long, bool)
228
229		void Swap(AlignedArray<T, alignment>& aOther)
230		{
231		mozilla::Swap(mPtr, aOther.mPtr);
232		mozilla::Swap(mStorage, aOther.mStorage);
233		mozilla::Swap(mCount, aOther.mCount);
234		}
235
236		size_t
237		HeapSizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
238	0	{
239	0	return aMallocSizeOf(mStorage);
240	0	}
241
242		MOZ_ALWAYS_INLINE operator T*()
243	0	{
244	0	return mPtr;
245	0	} Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned char, 16>::operator unsigned char() Unexecuted instantiation: mozilla::gfx::AlignedArray<unsigned int, 16>::operator unsigned int()
246
247		T *mPtr;
248
249		private:
250		uint8_t *mStorage;
251		size_t mCount;
252		};
253
254		/**
255		* Returns aWidth * aBytesPerPixel increased, if necessary, so that it divides
256		* exactly into \|alignment\|.
257		*
258		* Note that currently \|alignment\| must be a power-of-2. If for some reason we
259		* want to support NPOT alignment we can revert back to this functions old
260		* implementation.
261		*/
262		template<int alignment>
263		int32_t GetAlignedStride(int32_t aWidth, int32_t aBytesPerPixel)
264	0	{
265	0	static_assert(alignment > 0 && (alignment & (alignment-1)) == 0,
266	0	"This implementation currently require power-of-two alignment");
267	0	const int32_t mask = alignment - 1;
268	0	CheckedInt32 stride = CheckedInt32(aWidth) * CheckedInt32(aBytesPerPixel) + CheckedInt32(mask);
269	0	if (stride.isValid()) {
270	0	return stride.value() & ~mask;
271	0	}
272	0	return 0;
273	0	}
274
275		} // namespace gfx
276		} // namespace mozilla
277
278		#endif /* MOZILLA_GFX_TOOLS_H_ */