image/test/gtest/Common.h
author Andrew Osmond <aosmond@mozilla.com>
Fri, 02 Nov 2018 15:28:17 -0400
changeset 500768 5fb87d2312ea4881026ecaac6488fbdc2e4a7725
parent 500481 5223058ac4fffd00aad34eeb29998c3264b250e8
child 501284 1262664295ff6c471a0515b64a57b56d3c57b6ee
permissions -rw-r--r--
Bug 1504237 - Ensure partial animated frames always use BGRA instead of BGRX. r=tnikkel For decoders which produce unpaletted partial frames (APNG, WebP), the surface format should always be BGRA. These frames while partial, are the same size as the output size of the animated image. When FrameAnimator performs the blend with the compositing frame, it expects all pixels we don't care about to be set to fully transparent. If it is BGRX, they will be set to solid white instead. Differential Revision: https://phabricator.services.mozilla.com/D10753

/* -*- Mode: C++; tab-width: 2; 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/. */

#ifndef mozilla_image_test_gtest_Common_h
#define mozilla_image_test_gtest_Common_h

#include <vector>

#include "gtest/gtest.h"

#include "mozilla/Attributes.h"
#include "mozilla/Maybe.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/gfx/2D.h"
#include "Decoder.h"
#include "gfxColor.h"
#include "imgITools.h"
#include "nsCOMPtr.h"
#include "SurfacePipe.h"
#include "SurfacePipeFactory.h"

class nsIInputStream;

namespace mozilla {
namespace image {

///////////////////////////////////////////////////////////////////////////////
// Types
///////////////////////////////////////////////////////////////////////////////

enum TestCaseFlags
{
  TEST_CASE_DEFAULT_FLAGS   = 0,
  TEST_CASE_IS_FUZZY        = 1 << 0,
  TEST_CASE_HAS_ERROR       = 1 << 1,
  TEST_CASE_IS_TRANSPARENT  = 1 << 2,
  TEST_CASE_IS_ANIMATED     = 1 << 3,
  TEST_CASE_IGNORE_OUTPUT   = 1 << 4,
};

struct ImageTestCase
{
  ImageTestCase(const char* aPath,
                const char* aMimeType,
                gfx::IntSize aSize,
                uint32_t aFlags = TEST_CASE_DEFAULT_FLAGS)
    : mPath(aPath)
    , mMimeType(aMimeType)
    , mSize(aSize)
    , mOutputSize(aSize)
    , mFlags(aFlags)
  { }

  ImageTestCase(const char* aPath,
                const char* aMimeType,
                gfx::IntSize aSize,
                gfx::IntSize aOutputSize,
                uint32_t aFlags = TEST_CASE_DEFAULT_FLAGS)
    : mPath(aPath)
    , mMimeType(aMimeType)
    , mSize(aSize)
    , mOutputSize(aOutputSize)
    , mFlags(aFlags)
  { }

  const char* mPath;
  const char* mMimeType;
  gfx::IntSize mSize;
  gfx::IntSize mOutputSize;
  uint32_t mFlags;
};

struct BGRAColor
{
  BGRAColor() : BGRAColor(0, 0, 0, 0) { }

  BGRAColor(uint8_t aBlue, uint8_t aGreen, uint8_t aRed, uint8_t aAlpha, bool aPremultiplied = false)
    : mBlue(aBlue)
    , mGreen(aGreen)
    , mRed(aRed)
    , mAlpha(aAlpha)
    , mPremultiplied(aPremultiplied)
  { }

  static BGRAColor Green() { return BGRAColor(0x00, 0xFF, 0x00, 0xFF); }
  static BGRAColor Red()   { return BGRAColor(0x00, 0x00, 0xFF, 0xFF); }
  static BGRAColor Blue()   { return BGRAColor(0xFF, 0x00, 0x00, 0xFF); }
  static BGRAColor Transparent() { return BGRAColor(0x00, 0x00, 0x00, 0x00); }

  BGRAColor Premultiply() const
  {
    if (!mPremultiplied) {
      return BGRAColor(gfxPreMultiply(mBlue, mAlpha),
                       gfxPreMultiply(mGreen, mAlpha),
                       gfxPreMultiply(mRed, mAlpha),
                       mAlpha,
                       true);
    }
    return *this;
  }

  uint32_t AsPixel() const {
    if (!mPremultiplied) {
      return gfxPackedPixel(mAlpha, mRed, mGreen, mBlue);
    }
    return gfxPackedPixelNoPreMultiply(mAlpha, mRed, mGreen, mBlue);
  }

  uint8_t mBlue;
  uint8_t mGreen;
  uint8_t mRed;
  uint8_t mAlpha;
  bool mPremultiplied;
};


///////////////////////////////////////////////////////////////////////////////
// General Helpers
///////////////////////////////////////////////////////////////////////////////

/**
 * A RAII class that ensure that ImageLib services are available. Any tests that
 * require ImageLib to be initialized (for example, any test that uses the
 * SurfaceCache; see image::EnsureModuleInitialized() for the full list) can
 * use this class to ensure that ImageLib services are available. Failure to do
 * so can result in strange, non-deterministic failures.
 */
class AutoInitializeImageLib
{
public:
  AutoInitializeImageLib();
};

/// Spins on the main thread to process any pending events.
void SpinPendingEvents();

/// Loads a file from the current directory. @return an nsIInputStream for it.
already_AddRefed<nsIInputStream> LoadFile(const char* aRelativePath);

/**
 * @returns true if every pixel of @aSurface is @aColor.
 *
 * If @aFuzz is nonzero, a tolerance of @aFuzz is allowed in each color
 * component. This may be necessary for tests that involve JPEG images or
 * downscaling.
 */
bool IsSolidColor(gfx::SourceSurface* aSurface,
                  BGRAColor aColor,
                  uint8_t aFuzz = 0);

/**
 * @returns true if every pixel of @aDecoder's surface has the palette index
 * specified by @aColor.
 */
bool IsSolidPalettedColor(Decoder* aDecoder, uint8_t aColor);

/**
 * @returns true if every pixel in the range of rows specified by @aStartRow and
 * @aRowCount of @aSurface is @aColor.
 *
 * If @aFuzz is nonzero, a tolerance of @aFuzz is allowed in each color
 * component. This may be necessary for tests that involve JPEG images or
 * downscaling.
 */
bool RowsAreSolidColor(gfx::SourceSurface* aSurface,
                       int32_t aStartRow,
                       int32_t aRowCount,
                       BGRAColor aColor,
                       uint8_t aFuzz = 0);

/**
 * @returns true if every pixel in the range of rows specified by @aStartRow and
 * @aRowCount of @aDecoder's surface has the palette index specified by @aColor.
 */
bool PalettedRowsAreSolidColor(Decoder* aDecoder,
                               int32_t aStartRow,
                               int32_t aRowCount,
                               uint8_t aColor);

/**
 * @returns true if every pixel in the rect specified by @aRect is @aColor.
 *
 * If @aFuzz is nonzero, a tolerance of @aFuzz is allowed in each color
 * component. This may be necessary for tests that involve JPEG images or
 * downscaling.
 */
bool RectIsSolidColor(gfx::SourceSurface* aSurface,
                      const gfx::IntRect& aRect,
                      BGRAColor aColor,
                      uint8_t aFuzz = 0);

/**
 * @returns true if every pixel in the rect specified by @aRect has the palette
 * index specified by @aColor.
 */
bool PalettedRectIsSolidColor(Decoder* aDecoder,
                              const gfx::IntRect& aRect,
                              uint8_t aColor);

/**
 * @returns true if the pixels in @aRow of @aSurface match the pixels given in
 * @aPixels.
 */
bool RowHasPixels(gfx::SourceSurface* aSurface,
                  int32_t aRow,
                  const std::vector<BGRAColor>& aPixels);

// ExpectNoResume is an IResumable implementation for use by tests that expect
// Resume() to never get called.
class ExpectNoResume final : public IResumable
{
public:
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ExpectNoResume, override)

  void Resume() override { FAIL() << "Resume() should not get called"; }

private:
  ~ExpectNoResume() override { }
};

// CountResumes is an IResumable implementation for use by tests that expect
// Resume() to get called a certain number of times.
class CountResumes : public IResumable
{
public:
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CountResumes, override)

  CountResumes() : mCount(0) { }

  void Resume() override { mCount++; }
  uint32_t Count() const { return mCount; }

private:
  ~CountResumes() override { }

  uint32_t mCount;
};


///////////////////////////////////////////////////////////////////////////////
// SurfacePipe Helpers
///////////////////////////////////////////////////////////////////////////////

/**
 * Creates a decoder with no data associated with, suitable for testing code
 * that requires a decoder to initialize or to allocate surfaces but doesn't
 * actually need the decoder to do any decoding.
 *
 * XXX(seth): We only need this because SurfaceSink and PalettedSurfaceSink
 * defer to the decoder for surface allocation. Once all decoders use
 * SurfacePipe we won't need to do that anymore and we can remove this function.
 */
already_AddRefed<Decoder> CreateTrivialDecoder();

/**
 * Creates a pipeline of SurfaceFilters from a list of Config structs and passes
 * it to the provided lambda @aFunc. Assertions that the pipeline is constructly
 * correctly and cleanup of any allocated surfaces is handled automatically.
 *
 * @param aDecoder The decoder to use for allocating surfaces.
 * @param aFunc The lambda function to pass the filter pipeline to.
 * @param aConfigs The configuration for the pipeline.
 */
template <typename Func, typename... Configs>
void WithFilterPipeline(Decoder* aDecoder, Func aFunc, bool aFinish, const Configs&... aConfigs)
{
  auto pipe = MakeUnique<typename detail::FilterPipeline<Configs...>::Type>();
  nsresult rv = pipe->Configure(aConfigs...);
  ASSERT_TRUE(NS_SUCCEEDED(rv));

  aFunc(aDecoder, pipe.get());

  if (aFinish) {
    RawAccessFrameRef currentFrame = aDecoder->GetCurrentFrameRef();
    if (currentFrame) {
      currentFrame->Finish();
    }
  }
}

template <typename Func, typename... Configs>
void WithFilterPipeline(Decoder* aDecoder, Func aFunc, const Configs&... aConfigs)
{
  WithFilterPipeline(aDecoder, aFunc, true, aConfigs...);
}

/**
 * Creates a pipeline of SurfaceFilters from a list of Config structs and
 * asserts that configuring it fails. Cleanup of any allocated surfaces is
 * handled automatically.
 *
 * @param aDecoder The decoder to use for allocating surfaces.
 * @param aConfigs The configuration for the pipeline.
 */
template <typename... Configs>
void AssertConfiguringPipelineFails(Decoder* aDecoder, const Configs&... aConfigs)
{
  auto pipe = MakeUnique<typename detail::FilterPipeline<Configs...>::Type>();
  nsresult rv = pipe->Configure(aConfigs...);

  // Callers expect configuring the pipeline to fail.
  ASSERT_TRUE(NS_FAILED(rv));

  RawAccessFrameRef currentFrame = aDecoder->GetCurrentFrameRef();
  if (currentFrame) {
    currentFrame->Finish();
  }
}

/**
 * Asserts that the provided filter pipeline is in the correct final state,
 * which is to say, the entire surface has been written to (IsSurfaceFinished()
 * returns true) and the invalid rects are as expected.
 *
 * @param aFilter The filter pipeline to check.
 * @param aInputSpaceRect The expect invalid rect, in input space.
 * @param aoutputSpaceRect The expect invalid rect, in output space.
 */
void AssertCorrectPipelineFinalState(SurfaceFilter* aFilter,
                                     const gfx::IntRect& aInputSpaceRect,
                                     const gfx::IntRect& aOutputSpaceRect);

/**
 * Checks a generated image for correctness. Reports any unexpected deviation
 * from the expected image as GTest failures.
 *
 * @param aDecoder The decoder which contains the image. The decoder's current
 *                 frame will be checked.
 * @param aRect The region in the space of the output surface that the filter
 *              pipeline will actually write to. It's expected that pixels in
 *              this region are green, while pixels outside this region are
 *              transparent.
 * @param aFuzz The amount of fuzz to use in pixel comparisons.
 */
void CheckGeneratedImage(Decoder* aDecoder,
                         const gfx::IntRect& aRect,
                         uint8_t aFuzz = 0);

/**
 * Checks a generated surface for correctness. Reports any unexpected deviation
 * from the expected image as GTest failures.
 *
 * @param aSurface The surface to check.
 * @param aRect The region in the space of the output surface that the filter
 *              pipeline will actually write to.
 * @param aInnerColor Check that pixels inside of aRect are this color.
 * @param aOuterColor Check that pixels outside of aRect are this color.
 * @param aFuzz The amount of fuzz to use in pixel comparisons.
 */
void CheckGeneratedSurface(gfx::SourceSurface* aSurface,
                           const gfx::IntRect& aRect,
                           const BGRAColor& aInnerColor,
                           const BGRAColor& aOuterColor,
                           uint8_t aFuzz = 0);

/**
 * Checks a generated paletted image for correctness. Reports any unexpected
 * deviation from the expected image as GTest failures.
 *
 * @param aDecoder The decoder which contains the image. The decoder's current
 *                 frame will be checked.
 * @param aRect The region in the space of the output surface that the filter
 *              pipeline will actually write to. It's expected that pixels in
 *              this region have a palette index of 255, while pixels outside
 *              this region have a palette index of 0.
 */
void CheckGeneratedPalettedImage(Decoder* aDecoder, const gfx::IntRect& aRect);

/**
 * Tests the result of calling WritePixels() using the provided SurfaceFilter
 * pipeline. The pipeline must be a normal (i.e., non-paletted) pipeline.
 *
 * The arguments are specified in the an order intended to minimize the number
 * of arguments that most test cases need to pass.
 *
 * @param aDecoder The decoder whose current frame will be written to.
 * @param aFilter The SurfaceFilter pipeline to use.
 * @param aOutputRect The region in the space of the output surface that will be
 *                    invalidated by the filter pipeline. Defaults to
 *                    (0, 0, 100, 100).
 * @param aInputRect The region in the space of the input image that will be
 *                   invalidated by the filter pipeline. Defaults to
 *                   (0, 0, 100, 100).
 * @param aInputWriteRect The region in the space of the input image that the
 *                        filter pipeline will allow writes to. Note the
 *                        difference from @aInputRect: @aInputRect is the actual
 *                        region invalidated, while @aInputWriteRect is the
 *                        region that is written to. These can differ in cases
 *                        where the input is not clipped to the size of the image.
 *                        Defaults to the entire input rect.
 * @param aOutputWriteRect The region in the space of the output surface that
 *                         the filter pipeline will actually write to. It's
 *                         expected that pixels in this region are green, while
 *                         pixels outside this region are transparent. Defaults
 *                         to the entire output rect.
 */
void CheckWritePixels(Decoder* aDecoder,
                      SurfaceFilter* aFilter,
                      const Maybe<gfx::IntRect>& aOutputRect = Nothing(),
                      const Maybe<gfx::IntRect>& aInputRect = Nothing(),
                      const Maybe<gfx::IntRect>& aInputWriteRect = Nothing(),
                      const Maybe<gfx::IntRect>& aOutputWriteRect = Nothing(),
                      uint8_t aFuzz = 0);

/**
 * Tests the result of calling WritePixels() using the provided SurfaceFilter
 * pipeline. The pipeline must be a paletted pipeline.
 * @see CheckWritePixels() for documentation of the arguments.
 */
void CheckPalettedWritePixels(Decoder* aDecoder,
                              SurfaceFilter* aFilter,
                              const Maybe<gfx::IntRect>& aOutputRect = Nothing(),
                              const Maybe<gfx::IntRect>& aInputRect = Nothing(),
                              const Maybe<gfx::IntRect>& aInputWriteRect = Nothing(),
                              const Maybe<gfx::IntRect>& aOutputWriteRect = Nothing(),
                              uint8_t aFuzz = 0);

///////////////////////////////////////////////////////////////////////////////
// Decoder Helpers
///////////////////////////////////////////////////////////////////////////////

// Friend class of Decoder to access internals for tests.
class MOZ_STACK_CLASS DecoderTestHelper final
{
public:
  explicit DecoderTestHelper(Decoder* aDecoder)
    : mDecoder(aDecoder)
  { }

  void PostIsAnimated(FrameTimeout aTimeout)
  {
    mDecoder->PostIsAnimated(aTimeout);
  }

  void PostFrameStop(Opacity aOpacity)
  {
    mDecoder->PostFrameStop(aOpacity);
  }

private:
  Decoder* mDecoder;
};

///////////////////////////////////////////////////////////////////////////////
// Test Data
///////////////////////////////////////////////////////////////////////////////

ImageTestCase GreenPNGTestCase();
ImageTestCase GreenGIFTestCase();
ImageTestCase GreenJPGTestCase();
ImageTestCase GreenBMPTestCase();
ImageTestCase GreenICOTestCase();
ImageTestCase GreenIconTestCase();
ImageTestCase GreenWebPTestCase();

ImageTestCase GreenWebPIccSrgbTestCase();

ImageTestCase GreenFirstFrameAnimatedGIFTestCase();
ImageTestCase GreenFirstFrameAnimatedPNGTestCase();
ImageTestCase GreenFirstFrameAnimatedWebPTestCase();

ImageTestCase BlendAnimatedGIFTestCase();
ImageTestCase BlendAnimatedPNGTestCase();
ImageTestCase BlendAnimatedWebPTestCase();

ImageTestCase CorruptTestCase();
ImageTestCase CorruptBMPWithTruncatedHeader();
ImageTestCase CorruptICOWithBadBMPWidthTestCase();
ImageTestCase CorruptICOWithBadBMPHeightTestCase();
ImageTestCase CorruptICOWithBadBppTestCase();

ImageTestCase TransparentPNGTestCase();
ImageTestCase TransparentGIFTestCase();
ImageTestCase FirstFramePaddingGIFTestCase();
ImageTestCase TransparentIfWithinICOBMPTestCase(TestCaseFlags aFlags);
ImageTestCase NoFrameDelayGIFTestCase();
ImageTestCase ExtraImageSubBlocksAnimatedGIFTestCase();

ImageTestCase TransparentBMPWhenBMPAlphaEnabledTestCase();
ImageTestCase RLE4BMPTestCase();
ImageTestCase RLE8BMPTestCase();

ImageTestCase DownscaledPNGTestCase();
ImageTestCase DownscaledGIFTestCase();
ImageTestCase DownscaledJPGTestCase();
ImageTestCase DownscaledBMPTestCase();
ImageTestCase DownscaledICOTestCase();
ImageTestCase DownscaledIconTestCase();
ImageTestCase DownscaledWebPTestCase();
ImageTestCase DownscaledTransparentICOWithANDMaskTestCase();

ImageTestCase TruncatedSmallGIFTestCase();

ImageTestCase LargeICOWithBMPTestCase();
ImageTestCase LargeICOWithPNGTestCase();
ImageTestCase GreenMultipleSizesICOTestCase();

} // namespace image
} // namespace mozilla

#endif // mozilla_image_test_gtest_Common_h