1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/image/src/imgTools.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,316 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
1.5 + *
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "imgTools.h"
1.11 +
1.12 +#include "gfxUtils.h"
1.13 +#include "mozilla/gfx/2D.h"
1.14 +#include "mozilla/RefPtr.h"
1.15 +#include "nsCOMPtr.h"
1.16 +#include "nsIDocument.h"
1.17 +#include "nsIDOMDocument.h"
1.18 +#include "nsError.h"
1.19 +#include "imgLoader.h"
1.20 +#include "imgICache.h"
1.21 +#include "imgIContainer.h"
1.22 +#include "imgIEncoder.h"
1.23 +#include "nsStreamUtils.h"
1.24 +#include "nsContentUtils.h"
1.25 +#include "ImageFactory.h"
1.26 +#include "Image.h"
1.27 +#include "ScriptedNotificationObserver.h"
1.28 +#include "imgIScriptedNotificationObserver.h"
1.29 +#include "gfxPlatform.h"
1.30 +
1.31 +using namespace mozilla;
1.32 +using namespace mozilla::image;
1.33 +using namespace mozilla::gfx;
1.34 +
1.35 +/* ========== imgITools implementation ========== */
1.36 +
1.37 +
1.38 +
1.39 +NS_IMPL_ISUPPORTS(imgTools, imgITools)
1.40 +
1.41 +imgTools::imgTools()
1.42 +{
1.43 + /* member initializers and constructor code */
1.44 +}
1.45 +
1.46 +imgTools::~imgTools()
1.47 +{
1.48 + /* destructor code */
1.49 +}
1.50 +
1.51 +NS_IMETHODIMP imgTools::DecodeImageData(nsIInputStream* aInStr,
1.52 + const nsACString& aMimeType,
1.53 + imgIContainer **aContainer)
1.54 +{
1.55 + NS_ABORT_IF_FALSE(*aContainer == nullptr,
1.56 + "Cannot provide an existing image container to DecodeImageData");
1.57 +
1.58 + return DecodeImage(aInStr, aMimeType, aContainer);
1.59 +}
1.60 +
1.61 +NS_IMETHODIMP imgTools::DecodeImage(nsIInputStream* aInStr,
1.62 + const nsACString& aMimeType,
1.63 + imgIContainer **aContainer)
1.64 +{
1.65 + nsresult rv;
1.66 + nsRefPtr<Image> image;
1.67 +
1.68 + NS_ENSURE_ARG_POINTER(aInStr);
1.69 +
1.70 + // Create a new image container to hold the decoded data.
1.71 + nsAutoCString mimeType(aMimeType);
1.72 + image = ImageFactory::CreateAnonymousImage(mimeType);
1.73 +
1.74 + if (image->HasError())
1.75 + return NS_ERROR_FAILURE;
1.76 +
1.77 + // Prepare the input stream.
1.78 + nsCOMPtr<nsIInputStream> inStream = aInStr;
1.79 + if (!NS_InputStreamIsBuffered(aInStr)) {
1.80 + nsCOMPtr<nsIInputStream> bufStream;
1.81 + rv = NS_NewBufferedInputStream(getter_AddRefs(bufStream), aInStr, 1024);
1.82 + if (NS_SUCCEEDED(rv))
1.83 + inStream = bufStream;
1.84 + }
1.85 +
1.86 + // Figure out how much data we've been passed.
1.87 + uint64_t length;
1.88 + rv = inStream->Available(&length);
1.89 + NS_ENSURE_SUCCESS(rv, rv);
1.90 + NS_ENSURE_TRUE(length <= UINT32_MAX, NS_ERROR_FILE_TOO_BIG);
1.91 +
1.92 + // Send the source data to the Image.
1.93 + rv = image->OnImageDataAvailable(nullptr, nullptr, inStream, 0, uint32_t(length));
1.94 + NS_ENSURE_SUCCESS(rv, rv);
1.95 + // Let the Image know we've sent all the data.
1.96 + rv = image->OnImageDataComplete(nullptr, nullptr, NS_OK, true);
1.97 + NS_ENSURE_SUCCESS(rv, rv);
1.98 +
1.99 + // All done.
1.100 + NS_ADDREF(*aContainer = image.get());
1.101 + return NS_OK;
1.102 +}
1.103 +
1.104 +/**
1.105 + * This takes a DataSourceSurface rather than a SourceSurface because some
1.106 + * of the callers have a DataSourceSurface and we don't want to call
1.107 + * GetDataSurface on such surfaces since that may incure a conversion to
1.108 + * SurfaceType::DATA which we don't need.
1.109 + */
1.110 +static nsresult EncodeImageData(DataSourceSurface* aDataSurface,
1.111 + const nsACString& aMimeType,
1.112 + const nsAString& aOutputOptions,
1.113 + nsIInputStream **aStream)
1.114 +{
1.115 + MOZ_ASSERT(aDataSurface->GetFormat() == SurfaceFormat::B8G8R8A8,
1.116 + "We're assuming B8G8R8A8");
1.117 +
1.118 + // Get an image encoder for the media type
1.119 + nsAutoCString encoderCID(
1.120 + NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type=") + aMimeType);
1.121 +
1.122 + nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get());
1.123 + if (!encoder)
1.124 + return NS_IMAGELIB_ERROR_NO_ENCODER;
1.125 +
1.126 + DataSourceSurface::MappedSurface map;
1.127 + if (!aDataSurface->Map(DataSourceSurface::MapType::READ, &map)) {
1.128 + return NS_ERROR_FAILURE;
1.129 + }
1.130 +
1.131 + IntSize size = aDataSurface->GetSize();
1.132 + uint32_t dataLength = map.mStride * size.height;
1.133 +
1.134 + // Encode the bitmap
1.135 + nsresult rv = encoder->InitFromData(map.mData,
1.136 + dataLength,
1.137 + size.width,
1.138 + size.height,
1.139 + map.mStride,
1.140 + imgIEncoder::INPUT_FORMAT_HOSTARGB,
1.141 + aOutputOptions);
1.142 + aDataSurface->Unmap();
1.143 + NS_ENSURE_SUCCESS(rv, rv);
1.144 +
1.145 + return CallQueryInterface(encoder, aStream);
1.146 +}
1.147 +
1.148 +NS_IMETHODIMP imgTools::EncodeImage(imgIContainer *aContainer,
1.149 + const nsACString& aMimeType,
1.150 + const nsAString& aOutputOptions,
1.151 + nsIInputStream **aStream)
1.152 +{
1.153 + // Use frame 0 from the image container.
1.154 + RefPtr<SourceSurface> frame =
1.155 + aContainer->GetFrame(imgIContainer::FRAME_FIRST,
1.156 + imgIContainer::FLAG_SYNC_DECODE);
1.157 + NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
1.158 +
1.159 + RefPtr<DataSourceSurface> dataSurface;
1.160 +
1.161 + if (frame->GetFormat() == SurfaceFormat::B8G8R8A8) {
1.162 + dataSurface = frame->GetDataSurface();
1.163 + } else {
1.164 + // Convert format to SurfaceFormat::B8G8R8A8
1.165 + dataSurface = gfxUtils::
1.166 + CopySurfaceToDataSourceSurfaceWithFormat(frame,
1.167 + SurfaceFormat::B8G8R8A8);
1.168 + }
1.169 +
1.170 + NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE);
1.171 +
1.172 + return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
1.173 +}
1.174 +
1.175 +NS_IMETHODIMP imgTools::EncodeScaledImage(imgIContainer *aContainer,
1.176 + const nsACString& aMimeType,
1.177 + int32_t aScaledWidth,
1.178 + int32_t aScaledHeight,
1.179 + const nsAString& aOutputOptions,
1.180 + nsIInputStream **aStream)
1.181 +{
1.182 + NS_ENSURE_ARG(aScaledWidth >= 0 && aScaledHeight >= 0);
1.183 +
1.184 + // If no scaled size is specified, we'll just encode the image at its
1.185 + // original size (no scaling).
1.186 + if (aScaledWidth == 0 && aScaledHeight == 0) {
1.187 + return EncodeImage(aContainer, aMimeType, aOutputOptions, aStream);
1.188 + }
1.189 +
1.190 + // Use frame 0 from the image container.
1.191 + RefPtr<SourceSurface> frame =
1.192 + aContainer->GetFrame(imgIContainer::FRAME_FIRST,
1.193 + imgIContainer::FLAG_SYNC_DECODE);
1.194 + NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
1.195 +
1.196 + int32_t frameWidth = frame->GetSize().width;
1.197 + int32_t frameHeight = frame->GetSize().height;
1.198 +
1.199 + // If the given width or height is zero we'll replace it with the image's
1.200 + // original dimensions.
1.201 + if (aScaledWidth == 0) {
1.202 + aScaledWidth = frameWidth;
1.203 + } else if (aScaledHeight == 0) {
1.204 + aScaledHeight = frameHeight;
1.205 + }
1.206 +
1.207 + RefPtr<DataSourceSurface> dataSurface =
1.208 + Factory::CreateDataSourceSurface(IntSize(aScaledWidth, aScaledHeight),
1.209 + SurfaceFormat::B8G8R8A8);
1.210 + DataSourceSurface::MappedSurface map;
1.211 + if (!dataSurface->Map(DataSourceSurface::MapType::WRITE, &map)) {
1.212 + return NS_ERROR_FAILURE;
1.213 + }
1.214 +
1.215 + RefPtr<DrawTarget> dt =
1.216 + Factory::CreateDrawTargetForData(BackendType::CAIRO,
1.217 + map.mData,
1.218 + dataSurface->GetSize(),
1.219 + map.mStride,
1.220 + SurfaceFormat::B8G8R8A8);
1.221 + dt->DrawSurface(frame,
1.222 + Rect(0, 0, aScaledWidth, aScaledHeight),
1.223 + Rect(0, 0, frameWidth, frameHeight),
1.224 + DrawSurfaceOptions(),
1.225 + DrawOptions(1.0f, CompositionOp::OP_SOURCE));
1.226 +
1.227 + dataSurface->Unmap();
1.228 +
1.229 + return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
1.230 +}
1.231 +
1.232 +NS_IMETHODIMP imgTools::EncodeCroppedImage(imgIContainer *aContainer,
1.233 + const nsACString& aMimeType,
1.234 + int32_t aOffsetX,
1.235 + int32_t aOffsetY,
1.236 + int32_t aWidth,
1.237 + int32_t aHeight,
1.238 + const nsAString& aOutputOptions,
1.239 + nsIInputStream **aStream)
1.240 +{
1.241 + NS_ENSURE_ARG(aOffsetX >= 0 && aOffsetY >= 0 && aWidth >= 0 && aHeight >= 0);
1.242 +
1.243 + // Offsets must be zero when no width and height are given or else we're out
1.244 + // of bounds.
1.245 + NS_ENSURE_ARG(aWidth + aHeight > 0 || aOffsetX + aOffsetY == 0);
1.246 +
1.247 + // If no size is specified then we'll preserve the image's original dimensions
1.248 + // and don't need to crop.
1.249 + if (aWidth == 0 && aHeight == 0) {
1.250 + return EncodeImage(aContainer, aMimeType, aOutputOptions, aStream);
1.251 + }
1.252 +
1.253 + // Use frame 0 from the image container.
1.254 + RefPtr<SourceSurface> frame =
1.255 + aContainer->GetFrame(imgIContainer::FRAME_FIRST,
1.256 + imgIContainer::FLAG_SYNC_DECODE);
1.257 + NS_ENSURE_TRUE(frame, NS_ERROR_FAILURE);
1.258 +
1.259 + int32_t frameWidth = frame->GetSize().width;
1.260 + int32_t frameHeight = frame->GetSize().height;
1.261 +
1.262 + // If the given width or height is zero we'll replace it with the image's
1.263 + // original dimensions.
1.264 + if (aWidth == 0) {
1.265 + aWidth = frameWidth;
1.266 + } else if (aHeight == 0) {
1.267 + aHeight = frameHeight;
1.268 + }
1.269 +
1.270 + // Check that the given crop rectangle is within image bounds.
1.271 + NS_ENSURE_ARG(frameWidth >= aOffsetX + aWidth &&
1.272 + frameHeight >= aOffsetY + aHeight);
1.273 +
1.274 + RefPtr<DataSourceSurface> dataSurface =
1.275 + Factory::CreateDataSourceSurface(IntSize(aWidth, aHeight),
1.276 + SurfaceFormat::B8G8R8A8);
1.277 + DataSourceSurface::MappedSurface map;
1.278 + if (!dataSurface->Map(DataSourceSurface::MapType::WRITE, &map)) {
1.279 + return NS_ERROR_FAILURE;
1.280 + }
1.281 +
1.282 + RefPtr<DrawTarget> dt =
1.283 + Factory::CreateDrawTargetForData(BackendType::CAIRO,
1.284 + map.mData,
1.285 + dataSurface->GetSize(),
1.286 + map.mStride,
1.287 + SurfaceFormat::B8G8R8A8);
1.288 + dt->CopySurface(frame,
1.289 + IntRect(aOffsetX, aOffsetY, aWidth, aHeight),
1.290 + IntPoint(0, 0));
1.291 +
1.292 + dataSurface->Unmap();
1.293 +
1.294 + return EncodeImageData(dataSurface, aMimeType, aOutputOptions, aStream);
1.295 +}
1.296 +
1.297 +NS_IMETHODIMP imgTools::CreateScriptedObserver(imgIScriptedNotificationObserver* aInner,
1.298 + imgINotificationObserver** aObserver)
1.299 +{
1.300 + NS_ADDREF(*aObserver = new ScriptedNotificationObserver(aInner));
1.301 + return NS_OK;
1.302 +}
1.303 +
1.304 +NS_IMETHODIMP
1.305 +imgTools::GetImgLoaderForDocument(nsIDOMDocument* aDoc, imgILoader** aLoader)
1.306 +{
1.307 + nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
1.308 + NS_IF_ADDREF(*aLoader = nsContentUtils::GetImgLoaderForDocument(doc));
1.309 + return NS_OK;
1.310 +}
1.311 +
1.312 +NS_IMETHODIMP
1.313 +imgTools::GetImgCacheForDocument(nsIDOMDocument* aDoc, imgICache** aCache)
1.314 +{
1.315 + nsCOMPtr<imgILoader> loader;
1.316 + nsresult rv = GetImgLoaderForDocument(aDoc, getter_AddRefs(loader));
1.317 + NS_ENSURE_SUCCESS(rv, rv);
1.318 + return CallQueryInterface(loader, aCache);
1.319 +}
