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tenfourfox/image/imgTools.cpp

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/* -*- 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 "imgTools.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/RefPtr.h"
#include "nsCOMPtr.h"
#include "nsIDocument.h"
#include "nsIDOMDocument.h"
#include "nsError.h"
#include "imgLoader.h"
#include "imgICache.h"
#include "imgIContainer.h"
#include "imgIEncoder.h"
#include "nsStreamUtils.h"
#include "nsContentUtils.h"
#include "ImageFactory.h"
#include "Image.h"
#include "ScriptedNotificationObserver.h"
#include "imgIScriptedNotificationObserver.h"
#include "gfxPlatform.h"
using namespace mozilla::gfx;
namespace mozilla {
namespace image {
/* ========== imgITools implementation ========== */
NS_IMPL_ISUPPORTS(imgTools, imgITools)
imgTools::imgTools()
{
/* member initializers and constructor code */
}
imgTools::~imgTools()
{
/* destructor code */
}
NS_IMETHODIMP
imgTools::DecodeImageData(nsIInputStream* aInStr,
const nsACString& aMimeType,
imgIContainer** aContainer)
{
MOZ_ASSERT(*aContainer == nullptr,
"Cannot provide an existing image container to DecodeImageData");
return DecodeImage(aInStr, aMimeType, aContainer);
}
NS_IMETHODIMP
imgTools::DecodeImage(nsIInputStream* aInStr,
const nsACString& aMimeType,
imgIContainer** aContainer)
{
MOZ_ASSERT(NS_IsMainThread());
nsresult rv;
NS_ENSURE_ARG_POINTER(aInStr);
// Create a new image container to hold the decoded data.
nsAutoCString mimeType(aMimeType);
RefPtr<image::Image> image = ImageFactory::CreateAnonymousImage(mimeType);
RefPtr<ProgressTracker> tracker = image->GetProgressTracker();
if (image->HasError()) {
return NS_ERROR_FAILURE;
}
// Prepare the input stream.
nsCOMPtr<nsIInputStream> inStream = aInStr;
if (!NS_InputStreamIsBuffered(aInStr)) {
nsCOMPtr<nsIInputStream> bufStream;
rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream), aInStr, 1024);
if (NS_SUCCEEDED(rv)) {
inStream = bufStream;
}
}
// Figure out how much data we've been passed.
uint64_t length;
rv = inStream->Available(&length);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(length <= UINT32_MAX, NS_ERROR_FILE_TOO_BIG);
// Send the source data to the Image.
rv = image->OnImageDataAvailable(nullptr, nullptr, inStream, 0,
uint32_t(length));
NS_ENSURE_SUCCESS(rv, rv);
// Let the Image know we've sent all the data.
rv = image->OnImageDataComplete(nullptr, nullptr, NS_OK, true);
tracker->SyncNotifyProgress(FLAG_LOAD_COMPLETE);
NS_ENSURE_SUCCESS(rv, rv);
// All done.
NS_ADDREF(*aContainer = image.get());
return NS_OK;
}
/**
* This takes a DataSourceSurface rather than a SourceSurface because some
* of the callers have a DataSourceSurface and we don't want to call
* GetDataSurface on such surfaces since that may incure a conversion to
* SurfaceType::DATA which we don't need.
*/
static nsresult
EncodeImageData(DataSourceSurface* aDataSurface,
const nsACString& aMimeType,
const nsAString& aOutputOptions,
nsIInputStream** aStream)
{
MOZ_ASSERT(aDataSurface->GetFormat() == SurfaceFormat::B8G8R8A8,
"We're assuming B8G8R8A8");
// Get an image encoder for the media type
nsAutoCString encoderCID(
NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type=") + aMimeType);
nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get());
if (!encoder) {
return NS_IMAGELIB_ERROR_NO_ENCODER;
}
DataSourceSurface::MappedSurface map;
if (!aDataSurface->Map(DataSourceSurface::MapType::READ, &map)) {
return NS_ERROR_FAILURE;
}
IntSize size = aDataSurface->GetSize();
uint32_t dataLength = map.mStride * size.height;
// Encode the bitmap
nsresult rv = encoder->InitFromData(map.mData,
dataLength,
size.width,
size.height,
map.mStride,
imgIEncoder::INPUT_FORMAT_HOSTARGB,
aOutputOptions);
aDataSurface->Unmap();
NS_ENSURE_SUCCESS(rv, rv);
encoder.forget(aStream);
return NS_OK;
}
NS_IMETHODIMP
imgTools::EncodeImage(imgIContainer* aContainer,
const nsACString& aMimeType,
const nsAString& aOutputOptions,
nsIInputStream** aStream)
{
// Use frame 0 from the image container.
RefPtr<SourceSurface> frame =
aContainer->GetFrame(imgIContainer::FRAME_FIRST,
imgIContainer::FLAG_SYNC_DECODE);
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
RefPtr<DataSourceSurface> dataSurface;
if (frame->GetFormat() == SurfaceFormat::B8G8R8A8) {
dataSurface = frame->GetDataSurface();
} else {
// Convert format to SurfaceFormat::B8G8R8A8
dataSurface = gfxUtils::
CopySurfaceToDataSourceSurfaceWithFormat(frame,
SurfaceFormat::B8G8R8A8);
}
NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
}
NS_IMETHODIMP
imgTools::EncodeScaledImage(imgIContainer* aContainer,
const nsACString& aMimeType,
int32_t aScaledWidth,
int32_t aScaledHeight,
const nsAString& aOutputOptions,
nsIInputStream** aStream)
{
NS_ENSURE_ARG(aScaledWidth >= 0 && aScaledHeight >= 0);
// If no scaled size is specified, we'll just encode the image at its
// original size (no scaling).
if (aScaledWidth == 0 && aScaledHeight == 0) {
return EncodeImage(aContainer, aMimeType, aOutputOptions, aStream);
}
// Retrieve the image's size.
int32_t imageWidth = 0;
int32_t imageHeight = 0;
aContainer->GetWidth(&imageWidth);
aContainer->GetHeight(&imageHeight);
// If the given width or height is zero we'll replace it with the image's
// original dimensions.
IntSize scaledSize(aScaledWidth == 0 ? imageWidth : aScaledWidth,
aScaledHeight == 0 ? imageHeight : aScaledHeight);
// Use frame 0 from the image container.
RefPtr<SourceSurface> frame =
aContainer->GetFrameAtSize(scaledSize,
imgIContainer::FRAME_FIRST,
imgIContainer::FLAG_HIGH_QUALITY_SCALING |
imgIContainer::FLAG_SYNC_DECODE);
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
RefPtr<DataSourceSurface> dataSurface =
Factory::CreateDataSourceSurface(scaledSize, SurfaceFormat::B8G8R8A8);
if (NS_WARN_IF(!dataSurface)) {
return NS_ERROR_FAILURE;
}
DataSourceSurface::MappedSurface map;
if (!dataSurface->Map(DataSourceSurface::MapType::WRITE, &map)) {
return NS_ERROR_FAILURE;
}
RefPtr<DrawTarget> dt =
Factory::CreateDrawTargetForData(BackendType::CAIRO,
map.mData,
dataSurface->GetSize(),
map.mStride,
SurfaceFormat::B8G8R8A8);
if (!dt) {
gfxWarning() << "imgTools::EncodeImage failed in CreateDrawTargetForData";
return NS_ERROR_OUT_OF_MEMORY;
}
IntSize frameSize = frame->GetSize();
dt->DrawSurface(frame,
Rect(0, 0, scaledSize.width, scaledSize.height),
Rect(0, 0, frameSize.width, frameSize.height),
DrawSurfaceOptions(),
DrawOptions(1.0f, CompositionOp::OP_SOURCE));
dataSurface->Unmap();
return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
}
NS_IMETHODIMP
imgTools::EncodeCroppedImage(imgIContainer* aContainer,
const nsACString& aMimeType,
int32_t aOffsetX,
int32_t aOffsetY,
int32_t aWidth,
int32_t aHeight,
const nsAString& aOutputOptions,
nsIInputStream** aStream)
{
NS_ENSURE_ARG(aOffsetX >= 0 && aOffsetY >= 0 && aWidth >= 0 && aHeight >= 0);
// Offsets must be zero when no width and height are given or else we're out
// of bounds.
NS_ENSURE_ARG(aWidth + aHeight > 0 || aOffsetX + aOffsetY == 0);
// If no size is specified then we'll preserve the image's original dimensions
// and don't need to crop.
if (aWidth == 0 && aHeight == 0) {
return EncodeImage(aContainer, aMimeType, aOutputOptions, aStream);
}
// Use frame 0 from the image container.
RefPtr<SourceSurface> frame =
aContainer->GetFrame(imgIContainer::FRAME_FIRST,
imgIContainer::FLAG_SYNC_DECODE);
NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
int32_t frameWidth = frame->GetSize().width;
int32_t frameHeight = frame->GetSize().height;
// If the given width or height is zero we'll replace it with the image's
// original dimensions.
if (aWidth == 0) {
aWidth = frameWidth;
} else if (aHeight == 0) {
aHeight = frameHeight;
}
// Check that the given crop rectangle is within image bounds.
NS_ENSURE_ARG(frameWidth >= aOffsetX + aWidth &&
frameHeight >= aOffsetY + aHeight);
RefPtr<DataSourceSurface> dataSurface =
Factory::CreateDataSourceSurface(IntSize(aWidth, aHeight),
SurfaceFormat::B8G8R8A8,
/* aZero = */ true);
if (NS_WARN_IF(!dataSurface)) {
return NS_ERROR_FAILURE;
}
DataSourceSurface::MappedSurface map;
if (!dataSurface->Map(DataSourceSurface::MapType::WRITE, &map)) {
return NS_ERROR_FAILURE;
}
RefPtr<DrawTarget> dt =
Factory::CreateDrawTargetForData(BackendType::CAIRO,
map.mData,
dataSurface->GetSize(),
map.mStride,
SurfaceFormat::B8G8R8A8);
if (!dt) {
gfxWarning() <<
"imgTools::EncodeCroppedImage failed in CreateDrawTargetForData";
return NS_ERROR_OUT_OF_MEMORY;
}
dt->CopySurface(frame,
IntRect(aOffsetX, aOffsetY, aWidth, aHeight),
IntPoint(0, 0));
dataSurface->Unmap();
return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
}
NS_IMETHODIMP
imgTools::CreateScriptedObserver(imgIScriptedNotificationObserver* aInner,
imgINotificationObserver** aObserver)
{
NS_ADDREF(*aObserver = new ScriptedNotificationObserver(aInner));
return NS_OK;
}
NS_IMETHODIMP
imgTools::GetImgLoaderForDocument(nsIDOMDocument* aDoc, imgILoader** aLoader)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
NS_IF_ADDREF(*aLoader = nsContentUtils::GetImgLoaderForDocument(doc));
return NS_OK;
}
NS_IMETHODIMP
imgTools::GetImgCacheForDocument(nsIDOMDocument* aDoc, imgICache** aCache)
{
nsCOMPtr<imgILoader> loader;
nsresult rv = GetImgLoaderForDocument(aDoc, getter_AddRefs(loader));
NS_ENSURE_SUCCESS(rv, rv);
return CallQueryInterface(loader, aCache);
}
} // namespace image
} // namespace mozilla
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