image/DynamicImage.cpp
author cku <cku@mozilla.com>
Thu, 18 May 2017 22:03:41 +0200
changeset 359088 bbf16eb4f821b2d535826141f9f33f3eb49a54c6
parent 354579 a06749566178c2018473e7b863e48e0eee31be96
child 366474 9b91d24a1e30af6b9d6781c0af3c2cc3f330a96f
permissions -rw-r--r--
Bug 1351440 - Part 2. Encapsulate DrawResult and imgIContainer::FLAG_* into imgDrawingParams, and pass it to PaintSVG. r=jwatt The DrawResult return was not in fact anything to do with the success or failure of that method, but was actually passing out a very specific piece of information about the success or failure of any imagelib drawing that may not have occurred under the various PaintSVG calls. The signature of PaintSVG is changed from DrawResult PaintSVG(...., uint32 flags); to void PaintSVG(...., imgDrawingParams& aPackage); imgDrawingParams wraps DrawResult and imgIContainer::FLAG_* as a pack, pass through PaintSVG to imagelib draw calls under beneath. MozReview-Commit-ID: IOq2evUAOQF

/* -*- 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/. */

#include "DynamicImage.h"
#include "gfxPlatform.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/RefPtr.h"
#include "ImageRegion.h"
#include "Orientation.h"
#include "SVGImageContext.h"

#include "mozilla/MemoryReporting.h"

using namespace mozilla;
using namespace mozilla::gfx;
using mozilla::layers::LayerManager;
using mozilla::layers::ImageContainer;

namespace mozilla {
namespace image {

// Inherited methods from Image.

already_AddRefed<ProgressTracker>
DynamicImage::GetProgressTracker()
{
  return nullptr;
}

size_t
DynamicImage::SizeOfSourceWithComputedFallback(MallocSizeOf aMallocSizeOf) const
{
  return 0;
}

void
DynamicImage::CollectSizeOfSurfaces(nsTArray<SurfaceMemoryCounter>& aCounters,
                                    MallocSizeOf aMallocSizeOf) const
{
  // We can't report anything useful because gfxDrawable doesn't expose this
  // information.
}

void
DynamicImage::IncrementAnimationConsumers()
{ }

void
DynamicImage::DecrementAnimationConsumers()
{ }

#ifdef DEBUG
uint32_t
DynamicImage::GetAnimationConsumers()
{
  return 0;
}
#endif

nsresult
DynamicImage::OnImageDataAvailable(nsIRequest* aRequest,
                                   nsISupports* aContext,
                                   nsIInputStream* aInStr,
                                   uint64_t aSourceOffset,
                                   uint32_t aCount)
{
  return NS_OK;
}

nsresult
DynamicImage::OnImageDataComplete(nsIRequest* aRequest,
                                  nsISupports* aContext,
                                  nsresult aStatus,
                                  bool aLastPart)
{
  return NS_OK;
}

void
DynamicImage::OnSurfaceDiscarded(const SurfaceKey& aSurfaceKey)
{ }

void
DynamicImage::SetInnerWindowID(uint64_t aInnerWindowId)
{ }

uint64_t
DynamicImage::InnerWindowID() const
{
  return 0;
}

bool
DynamicImage::HasError()
{
  return !mDrawable;
}

void
DynamicImage::SetHasError()
{ }

ImageURL*
DynamicImage::GetURI()
{
  return nullptr;
}

// Methods inherited from XPCOM interfaces.

NS_IMPL_ISUPPORTS(DynamicImage, imgIContainer)

NS_IMETHODIMP
DynamicImage::GetWidth(int32_t* aWidth)
{
  *aWidth = mDrawable->Size().width;
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::GetHeight(int32_t* aHeight)
{
  *aHeight = mDrawable->Size().height;
  return NS_OK;
}

nsresult
DynamicImage::GetNativeSizes(nsTArray<IntSize>& aNativeSizes) const
{
  return NS_ERROR_NOT_IMPLEMENTED;
}

NS_IMETHODIMP
DynamicImage::GetIntrinsicSize(nsSize* aSize)
{
  IntSize intSize(mDrawable->Size());
  *aSize = nsSize(intSize.width, intSize.height);
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::GetIntrinsicRatio(nsSize* aSize)
{
  IntSize intSize(mDrawable->Size());
  *aSize = nsSize(intSize.width, intSize.height);
  return NS_OK;
}

NS_IMETHODIMP_(Orientation)
DynamicImage::GetOrientation()
{
  return Orientation();
}

NS_IMETHODIMP
DynamicImage::GetType(uint16_t* aType)
{
  *aType = imgIContainer::TYPE_RASTER;
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::GetAnimated(bool* aAnimated)
{
  *aAnimated = false;
  return NS_OK;
}

NS_IMETHODIMP_(already_AddRefed<SourceSurface>)
DynamicImage::GetFrame(uint32_t aWhichFrame,
                       uint32_t aFlags)
{
  IntSize size(mDrawable->Size());
  return GetFrameAtSize(IntSize(size.width, size.height),
                        aWhichFrame,
                        aFlags);
}

NS_IMETHODIMP_(already_AddRefed<SourceSurface>)
DynamicImage::GetFrameAtSize(const IntSize& aSize,
                             uint32_t aWhichFrame,
                             uint32_t aFlags)
{
  RefPtr<DrawTarget> dt = gfxPlatform::GetPlatform()->
    CreateOffscreenContentDrawTarget(aSize, SurfaceFormat::B8G8R8A8);
  if (!dt || !dt->IsValid()) {
    gfxWarning() <<
      "DynamicImage::GetFrame failed in CreateOffscreenContentDrawTarget";
    return nullptr;
  }
  RefPtr<gfxContext> context = gfxContext::CreateOrNull(dt);
  MOZ_ASSERT(context); // already checked the draw target above

  auto result = Draw(context, aSize, ImageRegion::Create(aSize),
                     aWhichFrame, SamplingFilter::POINT, Nothing(), aFlags,
                     1.0);

  return result == DrawResult::SUCCESS ? dt->Snapshot() : nullptr;
}

NS_IMETHODIMP_(bool)
DynamicImage::WillDrawOpaqueNow()
{
  return false;
}

NS_IMETHODIMP_(bool)
DynamicImage::IsImageContainerAvailable(LayerManager* aManager, uint32_t aFlags)
{
  return false;
}

NS_IMETHODIMP_(already_AddRefed<ImageContainer>)
DynamicImage::GetImageContainer(LayerManager* aManager, uint32_t aFlags)
{
  return nullptr;
}

NS_IMETHODIMP_(DrawResult)
DynamicImage::Draw(gfxContext* aContext,
                   const nsIntSize& aSize,
                   const ImageRegion& aRegion,
                   uint32_t aWhichFrame,
                   SamplingFilter aSamplingFilter,
                   const Maybe<SVGImageContext>& aSVGContext,
                   uint32_t aFlags,
                   float aOpacity)
{
  MOZ_ASSERT(!aSize.IsEmpty(), "Unexpected empty size");

  IntSize drawableSize(mDrawable->Size());

  if (aSize == drawableSize) {
    gfxUtils::DrawPixelSnapped(aContext, mDrawable, drawableSize, aRegion,
                               SurfaceFormat::B8G8R8A8, aSamplingFilter,
                               aOpacity);
    return DrawResult::SUCCESS;
  }

  gfxSize scale(double(aSize.width) / drawableSize.width,
                double(aSize.height) / drawableSize.height);

  ImageRegion region(aRegion);
  region.Scale(1.0 / scale.width, 1.0 / scale.height);

  gfxContextMatrixAutoSaveRestore saveMatrix(aContext);
  aContext->Multiply(gfxMatrix::Scaling(scale.width, scale.height));

  gfxUtils::DrawPixelSnapped(aContext, mDrawable, drawableSize, region,
                             SurfaceFormat::B8G8R8A8, aSamplingFilter,
                             aOpacity);
  return DrawResult::SUCCESS;
}

NS_IMETHODIMP
DynamicImage::StartDecoding(uint32_t aFlags)
{
  return NS_OK;
}

bool
DynamicImage::StartDecodingWithResult(uint32_t aFlags)
{
  return true;
}

NS_IMETHODIMP
DynamicImage::RequestDecodeForSize(const nsIntSize& aSize, uint32_t aFlags)
{
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::LockImage()
{
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::UnlockImage()
{
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::RequestDiscard()
{
  return NS_OK;
}

NS_IMETHODIMP_(void)
DynamicImage::RequestRefresh(const mozilla::TimeStamp& aTime)
{ }

NS_IMETHODIMP
DynamicImage::GetAnimationMode(uint16_t* aAnimationMode)
{
  *aAnimationMode = kNormalAnimMode;
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::SetAnimationMode(uint16_t aAnimationMode)
{
  return NS_OK;
}

NS_IMETHODIMP
DynamicImage::ResetAnimation()
{
  return NS_OK;
}

NS_IMETHODIMP_(float)
DynamicImage::GetFrameIndex(uint32_t aWhichFrame)
{
  return 0;
}

NS_IMETHODIMP_(int32_t)
DynamicImage::GetFirstFrameDelay()
{
  return 0;
}

NS_IMETHODIMP_(void)
DynamicImage::SetAnimationStartTime(const mozilla::TimeStamp& aTime)
{ }

nsIntSize
DynamicImage::OptimalImageSizeForDest(const gfxSize& aDest,
                                      uint32_t aWhichFrame,
                                      SamplingFilter aSamplingFilter,
                                      uint32_t aFlags)
{
  IntSize size(mDrawable->Size());
  return nsIntSize(size.width, size.height);
}

NS_IMETHODIMP_(nsIntRect)
DynamicImage::GetImageSpaceInvalidationRect(const nsIntRect& aRect)
{
  return aRect;
}

already_AddRefed<imgIContainer>
DynamicImage::Unwrap()
{
  nsCOMPtr<imgIContainer> self(this);
  return self.forget();
}

void
DynamicImage::PropagateUseCounters(nsIDocument*)
{
  // No use counters.
}

} // namespace image
} // namespace mozilla