gecko-dev/image/ImageFactory.cpp
Nathan Froyd 01583602a9 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.

CLOSED TREE makes big refactorings like this a piece of cake.

 # 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

--HG--
rename : mfbt/nsRefPtr.h => mfbt/RefPtr.h
2015-10-18 01:24:48 -04:00

289 lines
8.1 KiB
C++

/* -*- 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 <algorithm>
#include "mozilla/Likely.h"
#include "nsIHttpChannel.h"
#include "nsIFileChannel.h"
#include "nsIFile.h"
#include "nsMimeTypes.h"
#include "nsIRequest.h"
#include "MultipartImage.h"
#include "RasterImage.h"
#include "VectorImage.h"
#include "Image.h"
#include "nsMediaFragmentURIParser.h"
#include "nsContentUtils.h"
#include "nsIScriptSecurityManager.h"
#include "ImageFactory.h"
#include "gfxPrefs.h"
namespace mozilla {
namespace image {
/*static*/ void
ImageFactory::Initialize()
{ }
static uint32_t
ComputeImageFlags(ImageURL* uri, const nsCString& aMimeType, bool isMultiPart)
{
nsresult rv;
// We default to the static globals.
bool isDiscardable = gfxPrefs::ImageMemDiscardable();
bool doDecodeImmediately = gfxPrefs::ImageDecodeImmediatelyEnabled();
// We want UI to be as snappy as possible and not to flicker. Disable
// discarding for chrome URLS.
bool isChrome = false;
rv = uri->SchemeIs("chrome", &isChrome);
if (NS_SUCCEEDED(rv) && isChrome) {
isDiscardable = false;
}
// We don't want resources like the "loading" icon to be discardable either.
bool isResource = false;
rv = uri->SchemeIs("resource", &isResource);
if (NS_SUCCEEDED(rv) && isResource) {
isDiscardable = false;
}
// For multipart/x-mixed-replace, we basically want a direct channel to the
// decoder. Disable everything for this case.
if (isMultiPart) {
isDiscardable = false;
}
// We have all the information we need.
uint32_t imageFlags = Image::INIT_FLAG_NONE;
if (isDiscardable) {
imageFlags |= Image::INIT_FLAG_DISCARDABLE;
}
if (doDecodeImmediately) {
imageFlags |= Image::INIT_FLAG_DECODE_IMMEDIATELY;
}
if (isMultiPart) {
imageFlags |= Image::INIT_FLAG_TRANSIENT;
}
return imageFlags;
}
/* static */ already_AddRefed<Image>
ImageFactory::CreateImage(nsIRequest* aRequest,
ProgressTracker* aProgressTracker,
const nsCString& aMimeType,
ImageURL* aURI,
bool aIsMultiPart,
uint32_t aInnerWindowId)
{
MOZ_ASSERT(gfxPrefs::SingletonExists(),
"Pref observers should have been initialized already");
// Compute the image's initialization flags.
uint32_t imageFlags = ComputeImageFlags(aURI, aMimeType, aIsMultiPart);
// Select the type of image to create based on MIME type.
if (aMimeType.EqualsLiteral(IMAGE_SVG_XML)) {
return CreateVectorImage(aRequest, aProgressTracker, aMimeType,
aURI, imageFlags, aInnerWindowId);
} else {
return CreateRasterImage(aRequest, aProgressTracker, aMimeType,
aURI, imageFlags, aInnerWindowId);
}
}
// Marks an image as having an error before returning it.
template <typename T>
static already_AddRefed<Image>
BadImage(const char* aMessage, RefPtr<T>& aImage)
{
NS_WARNING(aMessage);
aImage->SetHasError();
return aImage.forget();
}
/* static */ already_AddRefed<Image>
ImageFactory::CreateAnonymousImage(const nsCString& aMimeType)
{
nsresult rv;
RefPtr<RasterImage> newImage = new RasterImage();
RefPtr<ProgressTracker> newTracker = new ProgressTracker();
newTracker->SetImage(newImage);
newImage->SetProgressTracker(newTracker);
rv = newImage->Init(aMimeType.get(), Image::INIT_FLAG_SYNC_LOAD);
if (NS_FAILED(rv)) {
return BadImage("RasterImage::Init failed", newImage);
}
return newImage.forget();
}
/* static */ already_AddRefed<MultipartImage>
ImageFactory::CreateMultipartImage(Image* aFirstPart,
ProgressTracker* aProgressTracker)
{
MOZ_ASSERT(aFirstPart);
MOZ_ASSERT(aProgressTracker);
RefPtr<MultipartImage> newImage = new MultipartImage(aFirstPart);
aProgressTracker->SetImage(newImage);
newImage->SetProgressTracker(aProgressTracker);
newImage->Init();
return newImage.forget();
}
int32_t
SaturateToInt32(int64_t val)
{
if (val > INT_MAX) {
return INT_MAX;
}
if (val < INT_MIN) {
return INT_MIN;
}
return static_cast<int32_t>(val);
}
uint32_t
GetContentSize(nsIRequest* aRequest)
{
nsCOMPtr<nsIChannel> channel(do_QueryInterface(aRequest));
if (channel) {
int64_t size;
nsresult rv = channel->GetContentLength(&size);
if (NS_SUCCEEDED(rv)) {
return std::max(SaturateToInt32(size), 0);
}
}
// Use the file size as a size hint for file channels.
nsCOMPtr<nsIFileChannel> fileChannel(do_QueryInterface(aRequest));
if (fileChannel) {
nsCOMPtr<nsIFile> file;
nsresult rv = fileChannel->GetFile(getter_AddRefs(file));
if (NS_SUCCEEDED(rv)) {
int64_t filesize;
rv = file->GetFileSize(&filesize);
if (NS_SUCCEEDED(rv)) {
return std::max(SaturateToInt32(filesize), 0);
}
}
}
// Fallback - neither http nor file. We'll use dynamic allocation.
return 0;
}
/* static */ already_AddRefed<Image>
ImageFactory::CreateRasterImage(nsIRequest* aRequest,
ProgressTracker* aProgressTracker,
const nsCString& aMimeType,
ImageURL* aURI,
uint32_t aImageFlags,
uint32_t aInnerWindowId)
{
MOZ_ASSERT(aProgressTracker);
nsresult rv;
RefPtr<RasterImage> newImage = new RasterImage(aURI);
aProgressTracker->SetImage(newImage);
newImage->SetProgressTracker(aProgressTracker);
nsAutoCString ref;
aURI->GetRef(ref);
net::nsMediaFragmentURIParser parser(ref);
if (parser.HasSampleSize()) {
/* Get our principal */
nsCOMPtr<nsIChannel> chan(do_QueryInterface(aRequest));
nsCOMPtr<nsIPrincipal> principal;
if (chan) {
nsContentUtils::GetSecurityManager()
->GetChannelResultPrincipal(chan, getter_AddRefs(principal));
}
if ((principal &&
principal->GetAppStatus() == nsIPrincipal::APP_STATUS_CERTIFIED) ||
gfxPrefs::ImageMozSampleSizeEnabled()) {
newImage->SetRequestedSampleSize(parser.GetSampleSize());
}
}
rv = newImage->Init(aMimeType.get(), aImageFlags);
if (NS_FAILED(rv)) {
return BadImage("RasterImage::Init failed", newImage);
}
newImage->SetInnerWindowID(aInnerWindowId);
uint32_t len = GetContentSize(aRequest);
// Pass anything usable on so that the RasterImage can preallocate
// its source buffer.
if (len > 0) {
// Bound by something reasonable
uint32_t sizeHint = std::min<uint32_t>(len, 20000000);
rv = newImage->SetSourceSizeHint(sizeHint);
if (NS_FAILED(rv)) {
// Flush memory, try to get some back, and try again.
rv = nsMemory::HeapMinimize(true);
nsresult rv2 = newImage->SetSourceSizeHint(sizeHint);
// If we've still failed at this point, things are going downhill.
if (NS_FAILED(rv) || NS_FAILED(rv2)) {
NS_WARNING("About to hit OOM in imagelib!");
}
}
}
return newImage.forget();
}
/* static */ already_AddRefed<Image>
ImageFactory::CreateVectorImage(nsIRequest* aRequest,
ProgressTracker* aProgressTracker,
const nsCString& aMimeType,
ImageURL* aURI,
uint32_t aImageFlags,
uint32_t aInnerWindowId)
{
MOZ_ASSERT(aProgressTracker);
nsresult rv;
RefPtr<VectorImage> newImage = new VectorImage(aURI);
aProgressTracker->SetImage(newImage);
newImage->SetProgressTracker(aProgressTracker);
rv = newImage->Init(aMimeType.get(), aImageFlags);
if (NS_FAILED(rv)) {
return BadImage("VectorImage::Init failed", newImage);
}
newImage->SetInnerWindowID(aInnerWindowId);
rv = newImage->OnStartRequest(aRequest, nullptr);
if (NS_FAILED(rv)) {
return BadImage("VectorImage::OnStartRequest failed", newImage);
}
return newImage.forget();
}
} // namespace image
} // namespace mozilla