gecko-dev/image/ImageFactory.cpp

290 строки
8.0 KiB
C++
Исходник Обычный вид История

/* -*- 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 "ImageFactory.h"
#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 "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);
#ifdef DEBUG
// Record the image load for startup performance testing.
if (NS_IsMainThread()) {
nsCOMPtr<nsIObserverService> obs = services::GetObserverService();
NS_WARNING_ASSERTION(obs, "Can't get an observer service handle");
if (obs) {
nsAutoCString spec;
aURI->GetSpec(spec);
obs->NotifyObservers(nullptr, "image-loading", NS_ConvertUTF8toUTF16(spec).get());
}
}
#endif
// 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>
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 08:24:48 +03:00
BadImage(const char* aMessage, RefPtr<T>& aImage)
{
aImage->SetHasError();
return aImage.forget();
}
static void
SetSourceSizeHint(RasterImage* aImage, uint32_t aSize)
{
// Pass anything usable on so that the RasterImage can preallocate
// its source buffer.
if (aSize == 0) {
return;
}
// Bound by something reasonable
uint32_t sizeHint = std::min<uint32_t>(aSize, 20000000);
nsresult rv = aImage->SetSourceSizeHint(sizeHint);
if (NS_FAILED(rv)) {
// Flush memory, try to get some back, and try again.
rv = nsMemory::HeapMinimize(true);
nsresult rv2 = aImage->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!");
}
}
}
/* static */ already_AddRefed<Image>
ImageFactory::CreateAnonymousImage(const nsCString& aMimeType,
uint32_t aSizeHint /* = 0 */)
{
nsresult rv;
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 08:24:48 +03:00
RefPtr<RasterImage> newImage = new RasterImage();
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 08:24:48 +03:00
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);
}
SetSourceSizeHint(newImage, aSizeHint);
return newImage.forget();
}
/* static */ already_AddRefed<MultipartImage>
ImageFactory::CreateMultipartImage(Image* aFirstPart,
ProgressTracker* aProgressTracker)
{
MOZ_ASSERT(aFirstPart);
MOZ_ASSERT(aProgressTracker);
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 08:24:48 +03:00
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;
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 08:24:48 +03:00
RefPtr<RasterImage> newImage = new RasterImage(aURI);
aProgressTracker->SetImage(newImage);
newImage->SetProgressTracker(aProgressTracker);
rv = newImage->Init(aMimeType.get(), aImageFlags);
if (NS_FAILED(rv)) {
return BadImage("RasterImage::Init failed", newImage);
}
newImage->SetInnerWindowID(aInnerWindowId);
SetSourceSizeHint(newImage, GetContentSize(aRequest));
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