image/ImageOps.cpp
author Nathan Froyd <froydnj@mozilla.com>
Wed, 07 Oct 2015 16:50:25 -0400
changeset 266617 91d4539e00cecb658604e021675a923c60ef3235
parent 266613 1f51d1614b9a58e41dd3a1bf2dc6aad34dbb2170
child 266639 41dea9df27ed995f8315ab4318c187a617937664
permissions -rw-r--r--
Bug 1207245 - part 6 - rename nsRefPtr<T> to RefPtr<T>; r=ehsan; a=Tomcat The bulk of this commit was generated with a script, executed at the top level of a typical source code checkout. The only non-machine-generated part was modifying MFBT's moz.build to reflect the new naming. # The main substitution. find . -name '*.cpp' -o -name '*.cc' -o -name '*.h' -o -name '*.mm' -o -name '*.idl'| \ xargs perl -p -i -e ' s/nsRefPtr\.h/RefPtr\.h/g; # handle includes s/nsRefPtr ?</RefPtr</g; # handle declarations and variables ' # Handle a special friend declaration in gfx/layers/AtomicRefCountedWithFinalize.h. perl -p -i -e 's/::nsRefPtr;/::RefPtr;/' gfx/layers/AtomicRefCountedWithFinalize.h # Handle nsRefPtr.h itself, a couple places that define constructors # from nsRefPtr, and code generators specially. We do this here, rather # than indiscriminantly s/nsRefPtr/RefPtr/, because that would rename # things like nsRefPtrHashtable. perl -p -i -e 's/nsRefPtr/RefPtr/g' \ mfbt/nsRefPtr.h \ xpcom/glue/nsCOMPtr.h \ xpcom/base/OwningNonNull.h \ ipc/ipdl/ipdl/lower.py \ ipc/ipdl/ipdl/builtin.py \ dom/bindings/Codegen.py \ python/lldbutils/lldbutils/utils.py # In our indiscriminate substitution above, we renamed # nsRefPtrGetterAddRefs, the class behind getter_AddRefs. Fix that up. find . -name '*.cpp' -o -name '*.h' -o -name '*.idl' | \ xargs perl -p -i -e 's/nsRefPtrGetterAddRefs/RefPtrGetterAddRefs/g' if [ -d .git ]; then git mv mfbt/nsRefPtr.h mfbt/RefPtr.h else hg mv mfbt/nsRefPtr.h mfbt/RefPtr.h fi

/* -*- 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 "ImageOps.h"

#include "ClippedImage.h"
#include "DecodePool.h"
#include "Decoder.h"
#include "DecoderFactory.h"
#include "DynamicImage.h"
#include "FrozenImage.h"
#include "Image.h"
#include "imgIContainer.h"
#include "mozilla/gfx/2D.h"
#include "nsStreamUtils.h"
#include "OrientedImage.h"
#include "SourceBuffer.h"

using namespace mozilla::gfx;

namespace mozilla {
namespace image {

/* static */ already_AddRefed<Image>
ImageOps::Freeze(Image* aImage)
{
  RefPtr<Image> frozenImage = new FrozenImage(aImage);
  return frozenImage.forget();
}

/* static */ already_AddRefed<imgIContainer>
ImageOps::Freeze(imgIContainer* aImage)
{
  nsCOMPtr<imgIContainer> frozenImage =
    new FrozenImage(static_cast<Image*>(aImage));
  return frozenImage.forget();
}

/* static */ already_AddRefed<Image>
ImageOps::Clip(Image* aImage, nsIntRect aClip)
{
  RefPtr<Image> clippedImage = new ClippedImage(aImage, aClip);
  return clippedImage.forget();
}

/* static */ already_AddRefed<imgIContainer>
ImageOps::Clip(imgIContainer* aImage, nsIntRect aClip)
{
  nsCOMPtr<imgIContainer> clippedImage =
    new ClippedImage(static_cast<Image*>(aImage), aClip);
  return clippedImage.forget();
}

/* static */ already_AddRefed<Image>
ImageOps::Orient(Image* aImage, Orientation aOrientation)
{
  RefPtr<Image> orientedImage = new OrientedImage(aImage, aOrientation);
  return orientedImage.forget();
}

/* static */ already_AddRefed<imgIContainer>
ImageOps::Orient(imgIContainer* aImage, Orientation aOrientation)
{
  nsCOMPtr<imgIContainer> orientedImage =
    new OrientedImage(static_cast<Image*>(aImage), aOrientation);
  return orientedImage.forget();
}

/* static */ already_AddRefed<imgIContainer>
ImageOps::CreateFromDrawable(gfxDrawable* aDrawable)
{
  nsCOMPtr<imgIContainer> drawableImage = new DynamicImage(aDrawable);
  return drawableImage.forget();
}

/* static */ already_AddRefed<gfx::SourceSurface>
ImageOps::DecodeToSurface(nsIInputStream* aInputStream,
                          const nsACString& aMimeType,
                          uint32_t aFlags)
{
  MOZ_ASSERT(aInputStream);

  nsresult rv;

  // Prepare the input stream.
  nsCOMPtr<nsIInputStream> inputStream = aInputStream;
  if (!NS_InputStreamIsBuffered(aInputStream)) {
    nsCOMPtr<nsIInputStream> bufStream;
    rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream),
                                   aInputStream, 1024);
    if (NS_SUCCEEDED(rv)) {
      inputStream = bufStream;
    }
  }

  // Figure out how much data we've been passed.
  uint64_t length;
  rv = inputStream->Available(&length);
  if (NS_FAILED(rv) || length > UINT32_MAX) {
    return nullptr;
  }

  // Write the data into a SourceBuffer.
  RefPtr<SourceBuffer> sourceBuffer = new SourceBuffer();
  sourceBuffer->ExpectLength(length);
  rv = sourceBuffer->AppendFromInputStream(inputStream, length);
  if (NS_FAILED(rv)) {
    return nullptr;
  }
  sourceBuffer->Complete(NS_OK);

  // Create a decoder.
  DecoderType decoderType =
    DecoderFactory::GetDecoderType(PromiseFlatCString(aMimeType).get());
  RefPtr<Decoder> decoder =
    DecoderFactory::CreateAnonymousDecoder(decoderType,
                                           sourceBuffer,
                                           ToSurfaceFlags(aFlags));
  if (!decoder) {
    return nullptr;
  }

  // Run the decoder synchronously.
  decoder->Decode();
  if (!decoder->GetDecodeDone() || decoder->HasError()) {
    return nullptr;
  }

  // Pull out the surface.
  RawAccessFrameRef frame = decoder->GetCurrentFrameRef();
  if (!frame) {
    return nullptr;
  }

  RefPtr<SourceSurface> surface = frame->GetSurface();
  if (!surface) {
    return nullptr;
  }

  return surface.forget();
}

} // namespace image
} // namespace mozilla