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-rw-r--r--image/encoders/bmp/moz.build15
-rw-r--r--image/encoders/bmp/nsBMPEncoder.cpp716
-rw-r--r--image/encoders/bmp/nsBMPEncoder.h150
-rw-r--r--image/encoders/ico/moz.build20
-rw-r--r--image/encoders/ico/nsICOEncoder.cpp499
-rw-r--r--image/encoders/ico/nsICOEncoder.h95
-rw-r--r--image/encoders/jpeg/moz.build11
-rw-r--r--image/encoders/jpeg/nsJPEGEncoder.cpp519
-rw-r--r--image/encoders/jpeg/nsJPEGEncoder.h74
-rw-r--r--image/encoders/moz.build13
-rw-r--r--image/encoders/png/moz.build17
-rw-r--r--image/encoders/png/nsPNGEncoder.cpp820
-rw-r--r--image/encoders/png/nsPNGEncoder.h79
-rw-r--r--image/encoders/webp/moz.build15
-rw-r--r--image/encoders/webp/nsWebPEncoder.cpp342
-rw-r--r--image/encoders/webp/nsWebPEncoder.h63
16 files changed, 3448 insertions, 0 deletions
diff --git a/image/encoders/bmp/moz.build b/image/encoders/bmp/moz.build
new file mode 100644
index 0000000000..783fd37005
--- /dev/null
+++ b/image/encoders/bmp/moz.build
@@ -0,0 +1,15 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+ "nsBMPEncoder.cpp",
+]
+
+LOCAL_INCLUDES += [
+ "/image",
+]
+
+FINAL_LIBRARY = "xul"
diff --git a/image/encoders/bmp/nsBMPEncoder.cpp b/image/encoders/bmp/nsBMPEncoder.cpp
new file mode 100644
index 0000000000..697950d7af
--- /dev/null
+++ b/image/encoders/bmp/nsBMPEncoder.cpp
@@ -0,0 +1,716 @@
+/* -*- 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 "nsCRT.h"
+#include "mozilla/EndianUtils.h"
+#include "mozilla/UniquePtrExtensions.h"
+#include "nsBMPEncoder.h"
+#include "nsString.h"
+#include "nsStreamUtils.h"
+#include "nsTArray.h"
+#include "mozilla/CheckedInt.h"
+#include "BMPHeaders.h"
+
+using namespace mozilla;
+using namespace mozilla::image;
+using namespace mozilla::image::bmp;
+
+NS_IMPL_ISUPPORTS(nsBMPEncoder, imgIEncoder, nsIInputStream,
+ nsIAsyncInputStream)
+
+nsBMPEncoder::nsBMPEncoder()
+ : mBMPInfoHeader{},
+ mImageBufferStart(nullptr),
+ mImageBufferCurr(0),
+ mImageBufferSize(0),
+ mImageBufferReadPoint(0),
+ mFinished(false),
+ mCallback(nullptr),
+ mCallbackTarget(nullptr),
+ mNotifyThreshold(0) {
+ this->mBMPFileHeader.filesize = 0;
+ this->mBMPFileHeader.reserved = 0;
+ this->mBMPFileHeader.dataoffset = 0;
+}
+
+nsBMPEncoder::~nsBMPEncoder() {
+ if (mImageBufferStart) {
+ free(mImageBufferStart);
+ mImageBufferStart = nullptr;
+ mImageBufferCurr = nullptr;
+ }
+}
+
+// nsBMPEncoder::InitFromData
+//
+// One output option is supported: bpp=<bpp_value>
+// bpp specifies the bits per pixel to use where bpp_value can be 24 or 32
+NS_IMETHODIMP
+nsBMPEncoder::InitFromData(const uint8_t* aData,
+ uint32_t aLength, // (unused, req'd by JS)
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ CheckedInt32 check = CheckedInt32(aWidth) * 4;
+ if (MOZ_UNLIKELY(!check.isValid())) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // Stride is the padded width of each row, so it better be longer
+ if ((aInputFormat == INPUT_FORMAT_RGB && aStride < aWidth * 3) ||
+ ((aInputFormat == INPUT_FORMAT_RGBA ||
+ aInputFormat == INPUT_FORMAT_HOSTARGB) &&
+ aStride < aWidth * 4)) {
+ NS_WARNING("Invalid stride for InitFromData");
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ nsresult rv;
+ rv = StartImageEncode(aWidth, aHeight, aInputFormat, aOutputOptions);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ rv = AddImageFrame(aData, aLength, aWidth, aHeight, aStride, aInputFormat,
+ aOutputOptions);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ rv = EndImageEncode();
+ return rv;
+}
+
+// Just a helper method to make it explicit in calculations that we are dealing
+// with bytes and not bits
+static inline uint16_t BytesPerPixel(uint16_t aBPP) { return aBPP / 8; }
+
+// Calculates the number of padding bytes that are needed per row of image data
+static inline uint32_t PaddingBytes(uint16_t aBPP, uint32_t aWidth) {
+ uint32_t rowSize = aWidth * BytesPerPixel(aBPP);
+ uint8_t paddingSize = 0;
+ if (rowSize % 4) {
+ paddingSize = (4 - (rowSize % 4));
+ }
+ return paddingSize;
+}
+
+// See ::InitFromData for other info.
+NS_IMETHODIMP
+nsBMPEncoder::StartImageEncode(uint32_t aWidth, uint32_t aHeight,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ // can't initialize more than once
+ if (mImageBufferStart || mImageBufferCurr) {
+ return NS_ERROR_ALREADY_INITIALIZED;
+ }
+
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // parse and check any provided output options
+ Version version;
+ uint16_t bpp;
+ nsresult rv = ParseOptions(aOutputOptions, version, bpp);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ MOZ_ASSERT(bpp <= 32);
+
+ rv = InitFileHeader(version, bpp, aWidth, aHeight);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ rv = InitInfoHeader(version, bpp, aWidth, aHeight);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ mImageBufferSize = mBMPFileHeader.filesize;
+ mImageBufferStart = static_cast<uint8_t*>(malloc(mImageBufferSize));
+ if (!mImageBufferStart) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ mImageBufferCurr = mImageBufferStart;
+
+ EncodeFileHeader();
+ EncodeInfoHeader();
+
+ return NS_OK;
+}
+
+// Returns the number of bytes in the image buffer used.
+// For a BMP file, this is all bytes in the buffer.
+NS_IMETHODIMP
+nsBMPEncoder::GetImageBufferUsed(uint32_t* aOutputSize) {
+ NS_ENSURE_ARG_POINTER(aOutputSize);
+ *aOutputSize = mImageBufferSize;
+ return NS_OK;
+}
+
+// Returns a pointer to the start of the image buffer
+NS_IMETHODIMP
+nsBMPEncoder::GetImageBuffer(char** aOutputBuffer) {
+ NS_ENSURE_ARG_POINTER(aOutputBuffer);
+ *aOutputBuffer = reinterpret_cast<char*>(mImageBufferStart);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBMPEncoder::AddImageFrame(const uint8_t* aData,
+ uint32_t aLength, // (unused, req'd by JS)
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aFrameOptions) {
+ // must be initialized
+ if (!mImageBufferStart || !mImageBufferCurr) {
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (mBMPInfoHeader.width < 0) {
+ return NS_ERROR_ILLEGAL_VALUE;
+ }
+
+ CheckedUint32 size = CheckedUint32(mBMPInfoHeader.width) *
+ CheckedUint32(BytesPerPixel(mBMPInfoHeader.bpp));
+ if (MOZ_UNLIKELY(!size.isValid())) {
+ return NS_ERROR_FAILURE;
+ }
+
+ auto row = MakeUniqueFallible<uint8_t[]>(size.value());
+ if (!row) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ CheckedUint32 check = CheckedUint32(mBMPInfoHeader.height) * aStride;
+ if (MOZ_UNLIKELY(!check.isValid())) {
+ return NS_ERROR_FAILURE;
+ }
+
+ // write each row: if we add more input formats, we may want to
+ // generalize the conversions
+ if (aInputFormat == INPUT_FORMAT_HOSTARGB) {
+ // BMP requires RGBA with post-multiplied alpha, so we need to convert
+ for (int32_t y = mBMPInfoHeader.height - 1; y >= 0; y--) {
+ ConvertHostARGBRow(&aData[y * aStride], row, mBMPInfoHeader.width);
+ if (mBMPInfoHeader.bpp == 24) {
+ EncodeImageDataRow24(row.get());
+ } else {
+ EncodeImageDataRow32(row.get());
+ }
+ }
+ } else if (aInputFormat == INPUT_FORMAT_RGBA) {
+ // simple RGBA, no conversion needed
+ for (int32_t y = 0; y < mBMPInfoHeader.height; y++) {
+ if (mBMPInfoHeader.bpp == 24) {
+ EncodeImageDataRow24(row.get());
+ } else {
+ EncodeImageDataRow32(row.get());
+ }
+ }
+ } else if (aInputFormat == INPUT_FORMAT_RGB) {
+ // simple RGB, no conversion needed
+ for (int32_t y = 0; y < mBMPInfoHeader.height; y++) {
+ if (mBMPInfoHeader.bpp == 24) {
+ EncodeImageDataRow24(&aData[y * aStride]);
+ } else {
+ EncodeImageDataRow32(&aData[y * aStride]);
+ }
+ }
+ } else {
+ MOZ_ASSERT_UNREACHABLE("Bad format type");
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBMPEncoder::EndImageEncode() {
+ // must be initialized
+ if (!mImageBufferStart || !mImageBufferCurr) {
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ mFinished = true;
+ NotifyListener();
+
+ // if output callback can't get enough memory, it will free our buffer
+ if (!mImageBufferStart || !mImageBufferCurr) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ return NS_OK;
+}
+
+// Parses the encoder options and sets the bits per pixel to use
+// See InitFromData for a description of the parse options
+nsresult nsBMPEncoder::ParseOptions(const nsAString& aOptions,
+ Version& aVersionOut, uint16_t& aBppOut) {
+ aVersionOut = VERSION_3;
+ aBppOut = 24;
+
+ // Parse the input string into a set of name/value pairs.
+ // From a format like: name=value;bpp=<bpp_value>;name=value
+ // to format: [0] = name=value, [1] = bpp=<bpp_value>, [2] = name=value
+ nsTArray<nsCString> nameValuePairs;
+ ParseString(NS_ConvertUTF16toUTF8(aOptions), ';', nameValuePairs);
+
+ // For each name/value pair in the set
+ for (uint32_t i = 0; i < nameValuePairs.Length(); ++i) {
+ // Split the name value pair [0] = name, [1] = value
+ nsTArray<nsCString> nameValuePair;
+ ParseString(nameValuePairs[i], '=', nameValuePair);
+ if (nameValuePair.Length() != 2) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // Parse the bpp portion of the string name=value;version=<version_value>;
+ // name=value
+ if (nameValuePair[0].Equals("version",
+ nsCaseInsensitiveCStringComparator)) {
+ if (nameValuePair[1].EqualsLiteral("3")) {
+ aVersionOut = VERSION_3;
+ } else if (nameValuePair[1].EqualsLiteral("5")) {
+ aVersionOut = VERSION_5;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+ }
+
+ // Parse the bpp portion of the string name=value;bpp=<bpp_value>;name=value
+ if (nameValuePair[0].Equals("bpp", nsCaseInsensitiveCStringComparator)) {
+ if (nameValuePair[1].EqualsLiteral("24")) {
+ aBppOut = 24;
+ } else if (nameValuePair[1].EqualsLiteral("32")) {
+ aBppOut = 32;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+ }
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBMPEncoder::Close() {
+ if (mImageBufferStart) {
+ free(mImageBufferStart);
+ mImageBufferStart = nullptr;
+ mImageBufferSize = 0;
+ mImageBufferReadPoint = 0;
+ mImageBufferCurr = nullptr;
+ }
+
+ return NS_OK;
+}
+
+// Obtains the available bytes to read
+NS_IMETHODIMP
+nsBMPEncoder::Available(uint64_t* _retval) {
+ if (!mImageBufferStart || !mImageBufferCurr) {
+ return NS_BASE_STREAM_CLOSED;
+ }
+
+ *_retval = GetCurrentImageBufferOffset() - mImageBufferReadPoint;
+ return NS_OK;
+}
+
+// Obtains the stream's status
+NS_IMETHODIMP
+nsBMPEncoder::StreamStatus() {
+ return mImageBufferStart && mImageBufferCurr ? NS_OK : NS_BASE_STREAM_CLOSED;
+}
+
+// [noscript] Reads bytes which are available
+NS_IMETHODIMP
+nsBMPEncoder::Read(char* aBuf, uint32_t aCount, uint32_t* _retval) {
+ return ReadSegments(NS_CopySegmentToBuffer, aBuf, aCount, _retval);
+}
+
+// [noscript] Reads segments
+NS_IMETHODIMP
+nsBMPEncoder::ReadSegments(nsWriteSegmentFun aWriter, void* aClosure,
+ uint32_t aCount, uint32_t* _retval) {
+ uint32_t maxCount = GetCurrentImageBufferOffset() - mImageBufferReadPoint;
+ if (maxCount == 0) {
+ *_retval = 0;
+ return mFinished ? NS_OK : NS_BASE_STREAM_WOULD_BLOCK;
+ }
+
+ if (aCount > maxCount) {
+ aCount = maxCount;
+ }
+ nsresult rv = aWriter(
+ this, aClosure,
+ reinterpret_cast<const char*>(mImageBufferStart + mImageBufferReadPoint),
+ 0, aCount, _retval);
+ if (NS_SUCCEEDED(rv)) {
+ NS_ASSERTION(*_retval <= aCount, "bad write count");
+ mImageBufferReadPoint += *_retval;
+ }
+ // errors returned from the writer end here!
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBMPEncoder::IsNonBlocking(bool* _retval) {
+ *_retval = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBMPEncoder::AsyncWait(nsIInputStreamCallback* aCallback, uint32_t aFlags,
+ uint32_t aRequestedCount, nsIEventTarget* aTarget) {
+ if (aFlags != 0) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+ }
+
+ if (mCallback || mCallbackTarget) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ mCallbackTarget = aTarget;
+ // 0 means "any number of bytes except 0"
+ mNotifyThreshold = aRequestedCount;
+ if (!aRequestedCount) {
+ mNotifyThreshold = 1024; // We don't want to notify incessantly
+ }
+
+ // We set the callback absolutely last, because NotifyListener uses it to
+ // determine if someone needs to be notified. If we don't set it last,
+ // NotifyListener might try to fire off a notification to a null target
+ // which will generally cause non-threadsafe objects to be used off the
+ // main thread
+ mCallback = aCallback;
+
+ // What we are being asked for may be present already
+ NotifyListener();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsBMPEncoder::CloseWithStatus(nsresult aStatus) { return Close(); }
+
+// nsBMPEncoder::ConvertHostARGBRow
+//
+// Our colors are stored with premultiplied alphas, but we need
+// an output with no alpha in machine-independent byte order.
+//
+void nsBMPEncoder::ConvertHostARGBRow(const uint8_t* aSrc,
+ const UniquePtr<uint8_t[]>& aDest,
+ uint32_t aPixelWidth) {
+ uint16_t bytes = BytesPerPixel(mBMPInfoHeader.bpp);
+
+ if (mBMPInfoHeader.bpp == 32) {
+ for (uint32_t x = 0; x < aPixelWidth; x++) {
+ const uint32_t& pixelIn = ((const uint32_t*)(aSrc))[x];
+ uint8_t* pixelOut = &aDest[x * bytes];
+
+ pixelOut[0] = (pixelIn & 0x00ff0000) >> 16;
+ pixelOut[1] = (pixelIn & 0x0000ff00) >> 8;
+ pixelOut[2] = (pixelIn & 0x000000ff) >> 0;
+ pixelOut[3] = (pixelIn & 0xff000000) >> 24;
+ }
+ } else {
+ for (uint32_t x = 0; x < aPixelWidth; x++) {
+ const uint32_t& pixelIn = ((const uint32_t*)(aSrc))[x];
+ uint8_t* pixelOut = &aDest[x * bytes];
+
+ pixelOut[0] = (pixelIn & 0xff0000) >> 16;
+ pixelOut[1] = (pixelIn & 0x00ff00) >> 8;
+ pixelOut[2] = (pixelIn & 0x0000ff) >> 0;
+ }
+ }
+}
+
+void nsBMPEncoder::NotifyListener() {
+ if (mCallback && (GetCurrentImageBufferOffset() - mImageBufferReadPoint >=
+ mNotifyThreshold ||
+ mFinished)) {
+ nsCOMPtr<nsIInputStreamCallback> callback;
+ if (mCallbackTarget) {
+ callback = NS_NewInputStreamReadyEvent("nsBMPEncoder::NotifyListener",
+ mCallback, mCallbackTarget);
+ } else {
+ callback = mCallback;
+ }
+
+ NS_ASSERTION(callback, "Shouldn't fail to make the callback");
+ // Null the callback first because OnInputStreamReady could
+ // reenter AsyncWait
+ mCallback = nullptr;
+ mCallbackTarget = nullptr;
+ mNotifyThreshold = 0;
+
+ callback->OnInputStreamReady(this);
+ }
+}
+
+// Initializes the BMP file header mBMPFileHeader to the passed in values
+nsresult nsBMPEncoder::InitFileHeader(Version aVersion, uint16_t aBPP,
+ uint32_t aWidth, uint32_t aHeight) {
+ memset(&mBMPFileHeader, 0, sizeof(mBMPFileHeader));
+ mBMPFileHeader.signature[0] = 'B';
+ mBMPFileHeader.signature[1] = 'M';
+
+ if (aVersion == VERSION_3) {
+ mBMPFileHeader.dataoffset = FILE_HEADER_LENGTH + InfoHeaderLength::WIN_V3;
+ } else { // aVersion == 5
+ mBMPFileHeader.dataoffset = FILE_HEADER_LENGTH + InfoHeaderLength::WIN_V5;
+ }
+
+ // The color table is present only if BPP is <= 8
+ if (aBPP <= 8) {
+ uint32_t numColors = 1 << aBPP;
+ mBMPFileHeader.dataoffset += 4 * numColors;
+ CheckedUint32 filesize = CheckedUint32(mBMPFileHeader.dataoffset) +
+ CheckedUint32(aWidth) * aHeight;
+ if (MOZ_UNLIKELY(!filesize.isValid())) {
+ return NS_ERROR_INVALID_ARG;
+ }
+ mBMPFileHeader.filesize = filesize.value();
+ } else {
+ CheckedUint32 filesize = CheckedUint32(mBMPFileHeader.dataoffset) +
+ (CheckedUint32(aWidth) * BytesPerPixel(aBPP) +
+ PaddingBytes(aBPP, aWidth)) *
+ aHeight;
+ if (MOZ_UNLIKELY(!filesize.isValid())) {
+ return NS_ERROR_INVALID_ARG;
+ }
+ mBMPFileHeader.filesize = filesize.value();
+ }
+
+ mBMPFileHeader.reserved = 0;
+
+ return NS_OK;
+}
+
+#define ENCODE(pImageBufferCurr, value) \
+ memcpy(*pImageBufferCurr, &value, sizeof value); \
+ *pImageBufferCurr += sizeof value;
+
+// Initializes the bitmap info header mBMPInfoHeader to the passed in values
+nsresult nsBMPEncoder::InitInfoHeader(Version aVersion, uint16_t aBPP,
+ uint32_t aWidth, uint32_t aHeight) {
+ memset(&mBMPInfoHeader, 0, sizeof(mBMPInfoHeader));
+ if (aVersion == VERSION_3) {
+ mBMPInfoHeader.bihsize = InfoHeaderLength::WIN_V3;
+ } else {
+ MOZ_ASSERT(aVersion == VERSION_5);
+ mBMPInfoHeader.bihsize = InfoHeaderLength::WIN_V5;
+ }
+
+ CheckedInt32 width(aWidth);
+ CheckedInt32 height(aHeight);
+ if (MOZ_UNLIKELY(!width.isValid() || !height.isValid())) {
+ return NS_ERROR_INVALID_ARG;
+ }
+ mBMPInfoHeader.width = width.value();
+ mBMPInfoHeader.height = height.value();
+
+ mBMPInfoHeader.planes = 1;
+ mBMPInfoHeader.bpp = aBPP;
+ mBMPInfoHeader.compression = 0;
+ mBMPInfoHeader.colors = 0;
+ mBMPInfoHeader.important_colors = 0;
+
+ CheckedUint32 check = CheckedUint32(aWidth) * BytesPerPixel(aBPP);
+ if (MOZ_UNLIKELY(!check.isValid())) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (aBPP <= 8) {
+ CheckedUint32 imagesize = CheckedUint32(aWidth) * aHeight;
+ if (MOZ_UNLIKELY(!imagesize.isValid())) {
+ return NS_ERROR_INVALID_ARG;
+ }
+ mBMPInfoHeader.image_size = imagesize.value();
+ } else {
+ CheckedUint32 imagesize = (CheckedUint32(aWidth) * BytesPerPixel(aBPP) +
+ PaddingBytes(aBPP, aWidth)) *
+ CheckedUint32(aHeight);
+ if (MOZ_UNLIKELY(!imagesize.isValid())) {
+ return NS_ERROR_INVALID_ARG;
+ }
+ mBMPInfoHeader.image_size = imagesize.value();
+ }
+ mBMPInfoHeader.xppm = 0;
+ mBMPInfoHeader.yppm = 0;
+ if (aVersion >= VERSION_5) {
+ mBMPInfoHeader.red_mask = 0x000000FF;
+ mBMPInfoHeader.green_mask = 0x0000FF00;
+ mBMPInfoHeader.blue_mask = 0x00FF0000;
+ mBMPInfoHeader.alpha_mask = 0xFF000000;
+ mBMPInfoHeader.color_space = V5InfoHeader::COLOR_SPACE_LCS_SRGB;
+ mBMPInfoHeader.white_point.r.x = 0;
+ mBMPInfoHeader.white_point.r.y = 0;
+ mBMPInfoHeader.white_point.r.z = 0;
+ mBMPInfoHeader.white_point.g.x = 0;
+ mBMPInfoHeader.white_point.g.y = 0;
+ mBMPInfoHeader.white_point.g.z = 0;
+ mBMPInfoHeader.white_point.b.x = 0;
+ mBMPInfoHeader.white_point.b.y = 0;
+ mBMPInfoHeader.white_point.b.z = 0;
+ mBMPInfoHeader.gamma_red = 0;
+ mBMPInfoHeader.gamma_green = 0;
+ mBMPInfoHeader.gamma_blue = 0;
+ mBMPInfoHeader.intent = 0;
+ mBMPInfoHeader.profile_offset = 0;
+ mBMPInfoHeader.profile_size = 0;
+ mBMPInfoHeader.reserved = 0;
+ }
+
+ return NS_OK;
+}
+
+// Encodes the BMP file header mBMPFileHeader
+void nsBMPEncoder::EncodeFileHeader() {
+ FileHeader littleEndianBFH = mBMPFileHeader;
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianBFH.filesize, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianBFH.reserved, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianBFH.dataoffset, 1);
+
+ ENCODE(&mImageBufferCurr, littleEndianBFH.signature);
+ ENCODE(&mImageBufferCurr, littleEndianBFH.filesize);
+ ENCODE(&mImageBufferCurr, littleEndianBFH.reserved);
+ ENCODE(&mImageBufferCurr, littleEndianBFH.dataoffset);
+}
+
+// Encodes the BMP info header mBMPInfoHeader
+void nsBMPEncoder::EncodeInfoHeader() {
+ V5InfoHeader littleEndianmBIH = mBMPInfoHeader;
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.bihsize, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.width, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.height, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.planes, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.bpp, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.compression, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.image_size, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.xppm, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.yppm, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.colors, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.important_colors,
+ 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.red_mask, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.green_mask, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.blue_mask, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.alpha_mask, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.color_space, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.r.x, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.r.y, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.r.z, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.g.x, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.g.y, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.g.z, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.b.x, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.b.y, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.white_point.b.z, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.gamma_red, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.gamma_green, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.gamma_blue, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.intent, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.profile_offset, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmBIH.profile_size, 1);
+
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.bihsize);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.width);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.height);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.planes);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.bpp);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.compression);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.image_size);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.xppm);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.yppm);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.colors);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.important_colors);
+
+ if (mBMPInfoHeader.bihsize > InfoHeaderLength::WIN_V3) {
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.red_mask);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.green_mask);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.blue_mask);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.alpha_mask);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.color_space);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.r.x);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.r.y);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.r.z);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.g.x);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.g.y);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.g.z);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.b.x);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.b.y);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.white_point.b.z);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.gamma_red);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.gamma_green);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.gamma_blue);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.intent);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.profile_offset);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.profile_size);
+ ENCODE(&mImageBufferCurr, littleEndianmBIH.reserved);
+ }
+}
+
+// Sets a pixel in the image buffer that doesn't have alpha data
+static inline void SetPixel24(uint8_t*& imageBufferCurr, uint8_t aRed,
+ uint8_t aGreen, uint8_t aBlue) {
+ *imageBufferCurr = aBlue;
+ *(imageBufferCurr + 1) = aGreen;
+ *(imageBufferCurr + 2) = aRed;
+}
+
+// Sets a pixel in the image buffer with alpha data
+static inline void SetPixel32(uint8_t*& imageBufferCurr, uint8_t aRed,
+ uint8_t aGreen, uint8_t aBlue,
+ uint8_t aAlpha = 0xFF) {
+ *imageBufferCurr = aBlue;
+ *(imageBufferCurr + 1) = aGreen;
+ *(imageBufferCurr + 2) = aRed;
+ *(imageBufferCurr + 3) = aAlpha;
+}
+
+// Encodes a row of image data which does not have alpha data
+void nsBMPEncoder::EncodeImageDataRow24(const uint8_t* aData) {
+ for (int32_t x = 0; x < mBMPInfoHeader.width; x++) {
+ uint32_t pos = x * BytesPerPixel(mBMPInfoHeader.bpp);
+ SetPixel24(mImageBufferCurr, aData[pos], aData[pos + 1], aData[pos + 2]);
+ mImageBufferCurr += BytesPerPixel(mBMPInfoHeader.bpp);
+ }
+
+ for (uint32_t x = 0;
+ x < PaddingBytes(mBMPInfoHeader.bpp, mBMPInfoHeader.width); x++) {
+ *mImageBufferCurr++ = 0;
+ }
+}
+
+// Encodes a row of image data which does have alpha data
+void nsBMPEncoder::EncodeImageDataRow32(const uint8_t* aData) {
+ for (int32_t x = 0; x < mBMPInfoHeader.width; x++) {
+ uint32_t pos = x * BytesPerPixel(mBMPInfoHeader.bpp);
+ SetPixel32(mImageBufferCurr, aData[pos], aData[pos + 1], aData[pos + 2],
+ aData[pos + 3]);
+ mImageBufferCurr += 4;
+ }
+
+ for (uint32_t x = 0;
+ x < PaddingBytes(mBMPInfoHeader.bpp, mBMPInfoHeader.width); x++) {
+ *mImageBufferCurr++ = 0;
+ }
+}
diff --git a/image/encoders/bmp/nsBMPEncoder.h b/image/encoders/bmp/nsBMPEncoder.h
new file mode 100644
index 0000000000..1f40d9df34
--- /dev/null
+++ b/image/encoders/bmp/nsBMPEncoder.h
@@ -0,0 +1,150 @@
+/* -*- 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/. */
+
+#ifndef mozilla_image_encoders_bmp_nsBMPEncoder_h
+#define mozilla_image_encoders_bmp_nsBMPEncoder_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ReentrantMonitor.h"
+#include "mozilla/UniquePtr.h"
+
+#include "imgIEncoder.h"
+
+#include "nsCOMPtr.h"
+
+#define NS_BMPENCODER_CID \
+ { /* 13a5320c-4c91-4FA4-bd16-b081a3ba8c0b */ \
+ 0x13a5320c, 0x4c91, 0x4fa4, { \
+ 0xbd, 0x16, 0xb0, 0x81, 0xa3, 0Xba, 0x8c, 0x0b \
+ } \
+ }
+
+namespace mozilla {
+namespace image {
+namespace bmp {
+
+struct FileHeader {
+ char signature[2]; // String "BM".
+ uint32_t filesize; // File size.
+ int32_t reserved; // Zero.
+ uint32_t dataoffset; // Offset to raster data.
+};
+
+struct XYZ {
+ int32_t x, y, z;
+};
+
+struct XYZTriple {
+ XYZ r, g, b;
+};
+
+struct V5InfoHeader {
+ uint32_t bihsize; // Header size
+ int32_t width; // Uint16 in OS/2 BMPs
+ int32_t height; // Uint16 in OS/2 BMPs
+ uint16_t planes; // =1
+ uint16_t bpp; // Bits per pixel.
+ uint32_t compression; // See Compression for valid values
+ uint32_t image_size; // (compressed) image size. Can be 0 if
+ // compression==0
+ uint32_t xppm; // Pixels per meter, horizontal
+ uint32_t yppm; // Pixels per meter, vertical
+ uint32_t colors; // Used Colors
+ uint32_t important_colors; // Number of important colors. 0=all
+ // The rest of the header is not available in WIN_V3 BMP Files
+ uint32_t red_mask; // Bits used for red component
+ uint32_t green_mask; // Bits used for green component
+ uint32_t blue_mask; // Bits used for blue component
+ uint32_t alpha_mask; // Bits used for alpha component
+ uint32_t color_space; // 0x73524742=LCS_sRGB ...
+ // These members are unused unless color_space == LCS_CALIBRATED_RGB
+ XYZTriple white_point; // Logical white point
+ uint32_t gamma_red; // Red gamma component
+ uint32_t gamma_green; // Green gamma component
+ uint32_t gamma_blue; // Blue gamma component
+ uint32_t intent; // Rendering intent
+ // These members are unused unless color_space == LCS_PROFILE_*
+ uint32_t profile_offset; // Offset to profile data in bytes
+ uint32_t profile_size; // Size of profile data in bytes
+ uint32_t reserved; // =0
+
+ static const uint32_t COLOR_SPACE_LCS_SRGB = 0x73524742;
+};
+
+} // namespace bmp
+} // namespace image
+} // namespace mozilla
+
+// Provides BMP encoding functionality. Use InitFromData() to do the
+// encoding. See that function definition for encoding options.
+
+class nsBMPEncoder final : public imgIEncoder {
+ typedef mozilla::ReentrantMonitor ReentrantMonitor;
+
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_IMGIENCODER
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ nsBMPEncoder();
+
+ protected:
+ ~nsBMPEncoder();
+
+ enum Version { VERSION_3 = 3, VERSION_5 = 5 };
+
+ // See InitData in the cpp for valid parse options
+ nsresult ParseOptions(const nsAString& aOptions, Version& aVersionOut,
+ uint16_t& aBppOut);
+ // Obtains data with no alpha in machine-independent byte order
+ void ConvertHostARGBRow(const uint8_t* aSrc,
+ const mozilla::UniquePtr<uint8_t[]>& aDest,
+ uint32_t aPixelWidth);
+ // Thread safe notify listener
+ void NotifyListener();
+
+ // Initializes the bitmap file header member mBMPFileHeader
+ nsresult InitFileHeader(Version aVersion, uint16_t aBPP, uint32_t aWidth,
+ uint32_t aHeight);
+ // Initializes the bitmap info header member mBMPInfoHeader
+ nsresult InitInfoHeader(Version aVersion, uint16_t aBPP, uint32_t aWidth,
+ uint32_t aHeight);
+
+ // Encodes the bitmap file header member mBMPFileHeader
+ void EncodeFileHeader();
+ // Encodes the bitmap info header member mBMPInfoHeader
+ void EncodeInfoHeader();
+ // Encodes a row of image data which does not have alpha data
+ void EncodeImageDataRow24(const uint8_t* aData);
+ // Encodes a row of image data which does have alpha data
+ void EncodeImageDataRow32(const uint8_t* aData);
+ // Obtains the current offset filled up to for the image buffer
+ inline int32_t GetCurrentImageBufferOffset() {
+ return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart);
+ }
+
+ // These headers will always contain endian independent stuff
+ // They store the BMP headers which will be encoded
+ mozilla::image::bmp::FileHeader mBMPFileHeader;
+ mozilla::image::bmp::V5InfoHeader mBMPInfoHeader;
+
+ // Keeps track of the start of the image buffer
+ uint8_t* mImageBufferStart;
+ // Keeps track of the current position in the image buffer
+ uint8_t* mImageBufferCurr;
+ // Keeps track of the image buffer size
+ uint32_t mImageBufferSize;
+ // Keeps track of the number of bytes in the image buffer which are read
+ uint32_t mImageBufferReadPoint;
+ // Stores true if the image is done being encoded
+ bool mFinished;
+
+ nsCOMPtr<nsIInputStreamCallback> mCallback;
+ nsCOMPtr<nsIEventTarget> mCallbackTarget;
+ uint32_t mNotifyThreshold;
+};
+
+#endif // mozilla_image_encoders_bmp_nsBMPEncoder_h
diff --git a/image/encoders/ico/moz.build b/image/encoders/ico/moz.build
new file mode 100644
index 0000000000..27e41489fd
--- /dev/null
+++ b/image/encoders/ico/moz.build
@@ -0,0 +1,20 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+ "nsICOEncoder.cpp",
+]
+
+# Decoders need RasterImage.h
+LOCAL_INCLUDES += [
+ "/image",
+ "/image/encoders/bmp",
+ "/image/encoders/png",
+]
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+FINAL_LIBRARY = "xul"
diff --git a/image/encoders/ico/nsICOEncoder.cpp b/image/encoders/ico/nsICOEncoder.cpp
new file mode 100644
index 0000000000..518acc9a0b
--- /dev/null
+++ b/image/encoders/ico/nsICOEncoder.cpp
@@ -0,0 +1,499 @@
+/* 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 "nsCRT.h"
+#include "mozilla/EndianUtils.h"
+#include "nsBMPEncoder.h"
+#include "BMPHeaders.h"
+#include "nsPNGEncoder.h"
+#include "nsICOEncoder.h"
+#include "nsString.h"
+#include "nsStreamUtils.h"
+#include "nsTArray.h"
+
+using namespace mozilla;
+using namespace mozilla::image;
+
+NS_IMPL_ISUPPORTS(nsICOEncoder, imgIEncoder, nsIInputStream,
+ nsIAsyncInputStream)
+
+nsICOEncoder::nsICOEncoder()
+ : mICOFileHeader{},
+ mICODirEntry{},
+ mImageBufferStart(nullptr),
+ mImageBufferCurr(0),
+ mImageBufferSize(0),
+ mImageBufferReadPoint(0),
+ mFinished(false),
+ mUsePNG(true),
+ mNotifyThreshold(0) {}
+
+nsICOEncoder::~nsICOEncoder() {
+ if (mImageBufferStart) {
+ free(mImageBufferStart);
+ mImageBufferStart = nullptr;
+ mImageBufferCurr = nullptr;
+ }
+}
+
+// nsICOEncoder::InitFromData
+// Two output options are supported: format=<png|bmp>;bpp=<bpp_value>
+// format specifies whether to use png or bitmap format
+// bpp specifies the bits per pixel to use where bpp_value can be 24 or 32
+NS_IMETHODIMP
+nsICOEncoder::InitFromData(const uint8_t* aData, uint32_t aLength,
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // Stride is the padded width of each row, so it better be longer
+ if ((aInputFormat == INPUT_FORMAT_RGB && aStride < aWidth * 3) ||
+ ((aInputFormat == INPUT_FORMAT_RGBA ||
+ aInputFormat == INPUT_FORMAT_HOSTARGB) &&
+ aStride < aWidth * 4)) {
+ NS_WARNING("Invalid stride for InitFromData");
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ nsresult rv;
+ rv = StartImageEncode(aWidth, aHeight, aInputFormat, aOutputOptions);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = AddImageFrame(aData, aLength, aWidth, aHeight, aStride, aInputFormat,
+ aOutputOptions);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = EndImageEncode();
+ return rv;
+}
+
+// Returns the number of bytes in the image buffer used
+// For an ICO file, this is all bytes in the buffer.
+NS_IMETHODIMP
+nsICOEncoder::GetImageBufferUsed(uint32_t* aOutputSize) {
+ NS_ENSURE_ARG_POINTER(aOutputSize);
+ *aOutputSize = mImageBufferSize;
+ return NS_OK;
+}
+
+// Returns a pointer to the start of the image buffer
+NS_IMETHODIMP
+nsICOEncoder::GetImageBuffer(char** aOutputBuffer) {
+ NS_ENSURE_ARG_POINTER(aOutputBuffer);
+ *aOutputBuffer = reinterpret_cast<char*>(mImageBufferStart);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsICOEncoder::AddImageFrame(const uint8_t* aData, uint32_t aLength,
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aFrameOptions) {
+ if (mUsePNG) {
+ mContainedEncoder = new nsPNGEncoder();
+ nsresult rv;
+ nsAutoString noParams;
+ rv = mContainedEncoder->InitFromData(aData, aLength, aWidth, aHeight,
+ aStride, aInputFormat, noParams);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ uint32_t PNGImageBufferSize;
+ mContainedEncoder->GetImageBufferUsed(&PNGImageBufferSize);
+ mImageBufferSize =
+ ICONFILEHEADERSIZE + ICODIRENTRYSIZE + PNGImageBufferSize;
+ mImageBufferStart = static_cast<uint8_t*>(malloc(mImageBufferSize));
+ if (!mImageBufferStart) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ mImageBufferCurr = mImageBufferStart;
+ mICODirEntry.mBytesInRes = PNGImageBufferSize;
+
+ EncodeFileHeader();
+ EncodeInfoHeader();
+
+ char* imageBuffer;
+ rv = mContainedEncoder->GetImageBuffer(&imageBuffer);
+ NS_ENSURE_SUCCESS(rv, rv);
+ memcpy(mImageBufferCurr, imageBuffer, PNGImageBufferSize);
+ mImageBufferCurr += PNGImageBufferSize;
+ } else {
+ mContainedEncoder = new nsBMPEncoder();
+ nsresult rv;
+
+ nsAutoString params;
+ params.AppendLiteral("bpp=");
+ params.AppendInt(mICODirEntry.mBitCount);
+
+ rv = mContainedEncoder->InitFromData(aData, aLength, aWidth, aHeight,
+ aStride, aInputFormat, params);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ uint32_t andMaskSize = ((GetRealWidth() + 31) / 32) * 4 * // row AND mask
+ GetRealHeight(); // num rows
+
+ uint32_t BMPImageBufferSize;
+ mContainedEncoder->GetImageBufferUsed(&BMPImageBufferSize);
+ mImageBufferSize =
+ ICONFILEHEADERSIZE + ICODIRENTRYSIZE + BMPImageBufferSize + andMaskSize;
+ mImageBufferStart = static_cast<uint8_t*>(malloc(mImageBufferSize));
+ if (!mImageBufferStart) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ mImageBufferCurr = mImageBufferStart;
+
+ // Icon files that wrap a BMP file must not include the BITMAPFILEHEADER
+ // section at the beginning of the encoded BMP data, so we must skip over
+ // bmp::FILE_HEADER_LENGTH bytes when adding the BMP content to the icon
+ // file.
+ mICODirEntry.mBytesInRes =
+ BMPImageBufferSize - bmp::FILE_HEADER_LENGTH + andMaskSize;
+
+ // Encode the icon headers
+ EncodeFileHeader();
+ EncodeInfoHeader();
+
+ char* imageBuffer;
+ rv = mContainedEncoder->GetImageBuffer(&imageBuffer);
+ NS_ENSURE_SUCCESS(rv, rv);
+ memcpy(mImageBufferCurr, imageBuffer + bmp::FILE_HEADER_LENGTH,
+ BMPImageBufferSize - bmp::FILE_HEADER_LENGTH);
+ // We need to fix the BMP height to be *2 for the AND mask
+ uint32_t fixedHeight = GetRealHeight() * 2;
+ NativeEndian::swapToLittleEndianInPlace(&fixedHeight, 1);
+ // The height is stored at an offset of 8 from the DIB header
+ memcpy(mImageBufferCurr + 8, &fixedHeight, sizeof(fixedHeight));
+ mImageBufferCurr += BMPImageBufferSize - bmp::FILE_HEADER_LENGTH;
+
+ // Calculate rowsize in DWORD's
+ uint32_t rowSize = ((GetRealWidth() + 31) / 32) * 4; // + 31 to round up
+ int32_t currentLine = GetRealHeight();
+
+ // Write out the AND mask
+ while (currentLine > 0) {
+ currentLine--;
+ uint8_t* encoded = mImageBufferCurr + currentLine * rowSize;
+ uint8_t* encodedEnd = encoded + rowSize;
+ while (encoded != encodedEnd) {
+ *encoded = 0; // make everything visible
+ encoded++;
+ }
+ }
+
+ mImageBufferCurr += andMaskSize;
+ }
+
+ return NS_OK;
+}
+
+// See ::InitFromData for other info.
+NS_IMETHODIMP
+nsICOEncoder::StartImageEncode(uint32_t aWidth, uint32_t aHeight,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ // can't initialize more than once
+ if (mImageBufferStart || mImageBufferCurr) {
+ return NS_ERROR_ALREADY_INITIALIZED;
+ }
+
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // Icons are only 1 byte, so make sure our bitmap is in range
+ if (aWidth > 256 || aHeight > 256) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // parse and check any provided output options
+ uint16_t bpp = 24;
+ bool usePNG = true;
+ nsresult rv = ParseOptions(aOutputOptions, bpp, usePNG);
+ NS_ENSURE_SUCCESS(rv, rv);
+ MOZ_ASSERT(bpp <= 32);
+
+ mUsePNG = usePNG;
+
+ InitFileHeader();
+ // The width and height are stored as 0 when we have a value of 256
+ InitInfoHeader(bpp, aWidth == 256 ? 0 : (uint8_t)aWidth,
+ aHeight == 256 ? 0 : (uint8_t)aHeight);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsICOEncoder::EndImageEncode() {
+ // must be initialized
+ if (!mImageBufferStart || !mImageBufferCurr) {
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ mFinished = true;
+ NotifyListener();
+
+ // if output callback can't get enough memory, it will free our buffer
+ if (!mImageBufferStart || !mImageBufferCurr) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ return NS_OK;
+}
+
+// Parses the encoder options and sets the bits per pixel to use and PNG or BMP
+// See InitFromData for a description of the parse options
+nsresult nsICOEncoder::ParseOptions(const nsAString& aOptions,
+ uint16_t& aBppOut, bool& aUsePNGOut) {
+ // If no parsing options just use the default of 24BPP and PNG yes
+ if (aOptions.Length() == 0) {
+ aUsePNGOut = true;
+ aBppOut = 24;
+ }
+
+ // Parse the input string into a set of name/value pairs.
+ // From format: format=<png|bmp>;bpp=<bpp_value>
+ // to format: [0] = format=<png|bmp>, [1] = bpp=<bpp_value>
+ nsTArray<nsCString> nameValuePairs;
+ ParseString(NS_ConvertUTF16toUTF8(aOptions), ';', nameValuePairs);
+
+ // For each name/value pair in the set
+ for (unsigned i = 0; i < nameValuePairs.Length(); ++i) {
+ // Split the name value pair [0] = name, [1] = value
+ nsTArray<nsCString> nameValuePair;
+ ParseString(nameValuePairs[i], '=', nameValuePair);
+ if (nameValuePair.Length() != 2) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // Parse the format portion of the string format=<png|bmp>;bpp=<bpp_value>
+ if (nameValuePair[0].Equals("format", nsCaseInsensitiveCStringComparator)) {
+ if (nameValuePair[1].Equals("png", nsCaseInsensitiveCStringComparator)) {
+ aUsePNGOut = true;
+ } else if (nameValuePair[1].Equals("bmp",
+ nsCaseInsensitiveCStringComparator)) {
+ aUsePNGOut = false;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+ }
+
+ // Parse the bpp portion of the string format=<png|bmp>;bpp=<bpp_value>
+ if (nameValuePair[0].Equals("bpp", nsCaseInsensitiveCStringComparator)) {
+ if (nameValuePair[1].EqualsLiteral("24")) {
+ aBppOut = 24;
+ } else if (nameValuePair[1].EqualsLiteral("32")) {
+ aBppOut = 32;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+ }
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsICOEncoder::Close() {
+ if (mImageBufferStart) {
+ free(mImageBufferStart);
+ mImageBufferStart = nullptr;
+ mImageBufferSize = 0;
+ mImageBufferReadPoint = 0;
+ mImageBufferCurr = nullptr;
+ }
+
+ return NS_OK;
+}
+
+// Obtains the available bytes to read
+NS_IMETHODIMP
+nsICOEncoder::Available(uint64_t* _retval) {
+ if (!mImageBufferStart || !mImageBufferCurr) {
+ return NS_BASE_STREAM_CLOSED;
+ }
+
+ *_retval = GetCurrentImageBufferOffset() - mImageBufferReadPoint;
+ return NS_OK;
+}
+
+// Obtains the stream's status
+NS_IMETHODIMP
+nsICOEncoder::StreamStatus() {
+ return mImageBufferStart && mImageBufferCurr ? NS_OK : NS_BASE_STREAM_CLOSED;
+}
+
+// [noscript] Reads bytes which are available
+NS_IMETHODIMP
+nsICOEncoder::Read(char* aBuf, uint32_t aCount, uint32_t* _retval) {
+ return ReadSegments(NS_CopySegmentToBuffer, aBuf, aCount, _retval);
+}
+
+// [noscript] Reads segments
+NS_IMETHODIMP
+nsICOEncoder::ReadSegments(nsWriteSegmentFun aWriter, void* aClosure,
+ uint32_t aCount, uint32_t* _retval) {
+ uint32_t maxCount = GetCurrentImageBufferOffset() - mImageBufferReadPoint;
+ if (maxCount == 0) {
+ *_retval = 0;
+ return mFinished ? NS_OK : NS_BASE_STREAM_WOULD_BLOCK;
+ }
+
+ if (aCount > maxCount) {
+ aCount = maxCount;
+ }
+
+ nsresult rv = aWriter(
+ this, aClosure,
+ reinterpret_cast<const char*>(mImageBufferStart + mImageBufferReadPoint),
+ 0, aCount, _retval);
+ if (NS_SUCCEEDED(rv)) {
+ NS_ASSERTION(*_retval <= aCount, "bad write count");
+ mImageBufferReadPoint += *_retval;
+ }
+ // errors returned from the writer end here!
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsICOEncoder::IsNonBlocking(bool* _retval) {
+ *_retval = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsICOEncoder::AsyncWait(nsIInputStreamCallback* aCallback, uint32_t aFlags,
+ uint32_t aRequestedCount, nsIEventTarget* aTarget) {
+ if (aFlags != 0) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+ }
+
+ if (mCallback || mCallbackTarget) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ mCallbackTarget = aTarget;
+ // 0 means "any number of bytes except 0"
+ mNotifyThreshold = aRequestedCount;
+ if (!aRequestedCount) {
+ mNotifyThreshold = 1024; // We don't want to notify incessantly
+ }
+
+ // We set the callback absolutely last, because NotifyListener uses it to
+ // determine if someone needs to be notified. If we don't set it last,
+ // NotifyListener might try to fire off a notification to a null target
+ // which will generally cause non-threadsafe objects to be used off the
+ // main thread
+ mCallback = aCallback;
+
+ // What we are being asked for may be present already
+ NotifyListener();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsICOEncoder::CloseWithStatus(nsresult aStatus) { return Close(); }
+
+void nsICOEncoder::NotifyListener() {
+ if (mCallback && (GetCurrentImageBufferOffset() - mImageBufferReadPoint >=
+ mNotifyThreshold ||
+ mFinished)) {
+ nsCOMPtr<nsIInputStreamCallback> callback;
+ if (mCallbackTarget) {
+ callback = NS_NewInputStreamReadyEvent("nsICOEncoder::NotifyListener",
+ mCallback, mCallbackTarget);
+ } else {
+ callback = mCallback;
+ }
+
+ NS_ASSERTION(callback, "Shouldn't fail to make the callback");
+ // Null the callback first because OnInputStreamReady could reenter
+ // AsyncWait
+ mCallback = nullptr;
+ mCallbackTarget = nullptr;
+ mNotifyThreshold = 0;
+
+ callback->OnInputStreamReady(this);
+ }
+}
+
+// Initializes the icon file header mICOFileHeader
+void nsICOEncoder::InitFileHeader() {
+ memset(&mICOFileHeader, 0, sizeof(mICOFileHeader));
+ mICOFileHeader.mReserved = 0;
+ mICOFileHeader.mType = 1;
+ mICOFileHeader.mCount = 1;
+}
+
+// Initializes the icon directory info header mICODirEntry
+void nsICOEncoder::InitInfoHeader(uint16_t aBPP, uint8_t aWidth,
+ uint8_t aHeight) {
+ memset(&mICODirEntry, 0, sizeof(mICODirEntry));
+ mICODirEntry.mBitCount = aBPP;
+ mICODirEntry.mBytesInRes = 0;
+ mICODirEntry.mColorCount = 0;
+ mICODirEntry.mWidth = aWidth;
+ mICODirEntry.mHeight = aHeight;
+ mICODirEntry.mImageOffset = ICONFILEHEADERSIZE + ICODIRENTRYSIZE;
+ mICODirEntry.mPlanes = 1;
+ mICODirEntry.mReserved = 0;
+}
+
+// Encodes the icon file header mICOFileHeader
+void nsICOEncoder::EncodeFileHeader() {
+ IconFileHeader littleEndianIFH = mICOFileHeader;
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianIFH.mReserved, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianIFH.mType, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianIFH.mCount, 1);
+
+ memcpy(mImageBufferCurr, &littleEndianIFH.mReserved,
+ sizeof(littleEndianIFH.mReserved));
+ mImageBufferCurr += sizeof(littleEndianIFH.mReserved);
+ memcpy(mImageBufferCurr, &littleEndianIFH.mType,
+ sizeof(littleEndianIFH.mType));
+ mImageBufferCurr += sizeof(littleEndianIFH.mType);
+ memcpy(mImageBufferCurr, &littleEndianIFH.mCount,
+ sizeof(littleEndianIFH.mCount));
+ mImageBufferCurr += sizeof(littleEndianIFH.mCount);
+}
+
+// Encodes the icon directory info header mICODirEntry
+void nsICOEncoder::EncodeInfoHeader() {
+ IconDirEntry littleEndianmIDE = mICODirEntry;
+
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmIDE.mPlanes, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmIDE.mBitCount, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmIDE.mBytesInRes, 1);
+ NativeEndian::swapToLittleEndianInPlace(&littleEndianmIDE.mImageOffset, 1);
+
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mWidth,
+ sizeof(littleEndianmIDE.mWidth));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mWidth);
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mHeight,
+ sizeof(littleEndianmIDE.mHeight));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mHeight);
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mColorCount,
+ sizeof(littleEndianmIDE.mColorCount));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mColorCount);
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mReserved,
+ sizeof(littleEndianmIDE.mReserved));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mReserved);
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mPlanes,
+ sizeof(littleEndianmIDE.mPlanes));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mPlanes);
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mBitCount,
+ sizeof(littleEndianmIDE.mBitCount));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mBitCount);
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mBytesInRes,
+ sizeof(littleEndianmIDE.mBytesInRes));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mBytesInRes);
+ memcpy(mImageBufferCurr, &littleEndianmIDE.mImageOffset,
+ sizeof(littleEndianmIDE.mImageOffset));
+ mImageBufferCurr += sizeof(littleEndianmIDE.mImageOffset);
+}
diff --git a/image/encoders/ico/nsICOEncoder.h b/image/encoders/ico/nsICOEncoder.h
new file mode 100644
index 0000000000..ef601ba97e
--- /dev/null
+++ b/image/encoders/ico/nsICOEncoder.h
@@ -0,0 +1,95 @@
+/* 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/. */
+
+#ifndef mozilla_image_encoders_ico_nsICOEncoder_h
+#define mozilla_image_encoders_ico_nsICOEncoder_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ReentrantMonitor.h"
+#include "mozilla/image/ICOFileHeaders.h"
+
+#include "imgIEncoder.h"
+
+#include "nsCOMPtr.h"
+
+#define NS_ICOENCODER_CID \
+ { /*92AE3AB2-8968-41B1-8709-B6123BCEAF21 */ \
+ 0x92ae3ab2, 0x8968, 0x41b1, { \
+ 0x87, 0x09, 0xb6, 0x12, 0x3b, 0Xce, 0xaf, 0x21 \
+ } \
+ }
+
+// Provides ICO encoding functionality. Use InitFromData() to do the
+// encoding. See that function definition for encoding options.
+
+class nsICOEncoder final : public imgIEncoder {
+ typedef mozilla::ReentrantMonitor ReentrantMonitor;
+
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_IMGIENCODER
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ nsICOEncoder();
+
+ // Obtains the width of the icon directory entry
+ uint32_t GetRealWidth() const {
+ return mICODirEntry.mWidth == 0 ? 256 : mICODirEntry.mWidth;
+ }
+
+ // Obtains the height of the icon directory entry
+ uint32_t GetRealHeight() const {
+ return mICODirEntry.mHeight == 0 ? 256 : mICODirEntry.mHeight;
+ }
+
+ protected:
+ ~nsICOEncoder();
+
+ nsresult ParseOptions(const nsAString& aOptions, uint16_t& aBppOut,
+ bool& aUsePNGOut);
+ void NotifyListener();
+
+ // Initializes the icon file header mICOFileHeader
+ void InitFileHeader();
+ // Initializes the icon directory info header mICODirEntry
+ void InitInfoHeader(uint16_t aBPP, uint8_t aWidth, uint8_t aHeight);
+ // Encodes the icon file header mICOFileHeader
+ void EncodeFileHeader();
+ // Encodes the icon directory info header mICODirEntry
+ void EncodeInfoHeader();
+ // Obtains the current offset filled up to for the image buffer
+ inline int32_t GetCurrentImageBufferOffset() {
+ return static_cast<int32_t>(mImageBufferCurr - mImageBufferStart);
+ }
+
+ // Holds either a PNG or a BMP depending on the encoding options specified
+ // or if no encoding options specified will use the default (PNG)
+ nsCOMPtr<imgIEncoder> mContainedEncoder;
+
+ // These headers will always contain endian independent stuff.
+ // Don't trust the width and height of mICODirEntry directly,
+ // instead use the accessors GetRealWidth() and GetRealHeight().
+ mozilla::image::IconFileHeader mICOFileHeader;
+ mozilla::image::IconDirEntry mICODirEntry;
+
+ // Keeps track of the start of the image buffer
+ uint8_t* mImageBufferStart;
+ // Keeps track of the current position in the image buffer
+ uint8_t* mImageBufferCurr;
+ // Keeps track of the image buffer size
+ uint32_t mImageBufferSize;
+ // Keeps track of the number of bytes in the image buffer which are read
+ uint32_t mImageBufferReadPoint;
+ // Stores true if the image is done being encoded
+ bool mFinished;
+ // Stores true if the contained image is a PNG
+ bool mUsePNG;
+
+ nsCOMPtr<nsIInputStreamCallback> mCallback;
+ nsCOMPtr<nsIEventTarget> mCallbackTarget;
+ uint32_t mNotifyThreshold;
+};
+
+#endif // mozilla_image_encoders_ico_nsICOEncoder_h
diff --git a/image/encoders/jpeg/moz.build b/image/encoders/jpeg/moz.build
new file mode 100644
index 0000000000..6952fc1b9f
--- /dev/null
+++ b/image/encoders/jpeg/moz.build
@@ -0,0 +1,11 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+ "nsJPEGEncoder.cpp",
+]
+
+FINAL_LIBRARY = "xul"
diff --git a/image/encoders/jpeg/nsJPEGEncoder.cpp b/image/encoders/jpeg/nsJPEGEncoder.cpp
new file mode 100644
index 0000000000..2975532b58
--- /dev/null
+++ b/image/encoders/jpeg/nsJPEGEncoder.cpp
@@ -0,0 +1,519 @@
+/* -*- 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 "nsJPEGEncoder.h"
+#include "prprf.h"
+#include "nsString.h"
+#include "nsStreamUtils.h"
+#include "gfxColor.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/UniquePtrExtensions.h"
+
+extern "C" {
+#include "jpeglib.h"
+}
+
+#include <setjmp.h>
+#include "jerror.h"
+
+using namespace mozilla;
+
+NS_IMPL_ISUPPORTS(nsJPEGEncoder, imgIEncoder, nsIInputStream,
+ nsIAsyncInputStream)
+
+class nsJPEGEncoderInternal {
+ friend class nsJPEGEncoder;
+
+ protected:
+ /**
+ * Initialize destination. This is called by jpeg_start_compress() before
+ * any data is actually written. It must initialize next_output_byte and
+ * free_in_buffer. free_in_buffer must be initialized to a positive value.
+ */
+ static void initDestination(jpeg_compress_struct* cinfo);
+
+ /**
+ * This is called whenever the buffer has filled (free_in_buffer reaches
+ * zero). In typical applications, it should write out the *entire* buffer
+ * (use the saved start address and buffer length; ignore the current state
+ * of next_output_byte and free_in_buffer). Then reset the pointer & count
+ * to the start of the buffer, and return TRUE indicating that the buffer
+ * has been dumped. free_in_buffer must be set to a positive value when
+ * TRUE is returned. A FALSE return should only be used when I/O suspension
+ * is desired (this operating mode is discussed in the next section).
+ */
+ static boolean emptyOutputBuffer(jpeg_compress_struct* cinfo);
+
+ /**
+ * Terminate destination --- called by jpeg_finish_compress() after all data
+ * has been written. In most applications, this must flush any data
+ * remaining in the buffer. Use either next_output_byte or free_in_buffer
+ * to determine how much data is in the buffer.
+ */
+ static void termDestination(jpeg_compress_struct* cinfo);
+
+ /**
+ * Override the standard error method in the IJG JPEG decoder code. This
+ * was mostly copied from nsJPEGDecoder.cpp
+ */
+ static void errorExit(jpeg_common_struct* cinfo);
+};
+
+// used to pass error info through the JPEG library
+struct encoder_error_mgr {
+ jpeg_error_mgr pub;
+ jmp_buf setjmp_buffer;
+};
+
+nsJPEGEncoder::nsJPEGEncoder()
+ : mFinished(false),
+ mImageBuffer(nullptr),
+ mImageBufferSize(0),
+ mImageBufferUsed(0),
+ mImageBufferReadPoint(0),
+ mCallback(nullptr),
+ mCallbackTarget(nullptr),
+ mNotifyThreshold(0),
+ mReentrantMonitor("nsJPEGEncoder.mReentrantMonitor") {}
+
+nsJPEGEncoder::~nsJPEGEncoder() {
+ if (mImageBuffer) {
+ free(mImageBuffer);
+ mImageBuffer = nullptr;
+ }
+}
+
+// nsJPEGEncoder::InitFromData
+//
+// One output option is supported: "quality=X" where X is an integer in the
+// range 0-100. Higher values for X give better quality.
+//
+// Transparency is always discarded.
+
+NS_IMETHODIMP
+nsJPEGEncoder::InitFromData(const uint8_t* aData,
+ uint32_t aLength, // (unused, req'd by JS)
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ NS_ENSURE_ARG(aData);
+
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB)
+ return NS_ERROR_INVALID_ARG;
+
+ // Stride is the padded width of each row, so it better be longer (I'm afraid
+ // people will not understand what stride means, so check it well)
+ if ((aInputFormat == INPUT_FORMAT_RGB && aStride < aWidth * 3) ||
+ ((aInputFormat == INPUT_FORMAT_RGBA ||
+ aInputFormat == INPUT_FORMAT_HOSTARGB) &&
+ aStride < aWidth * 4)) {
+ NS_WARNING("Invalid stride for InitFromData");
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // can't initialize more than once
+ if (mImageBuffer != nullptr) {
+ return NS_ERROR_ALREADY_INITIALIZED;
+ }
+
+ // options: we only have one option so this is easy
+ int quality = 92;
+ if (aOutputOptions.Length() > 0) {
+ // have options string
+ const nsString qualityPrefix(u"quality="_ns);
+ if (aOutputOptions.Length() > qualityPrefix.Length() &&
+ StringBeginsWith(aOutputOptions, qualityPrefix)) {
+ // have quality string
+ nsCString value = NS_ConvertUTF16toUTF8(
+ Substring(aOutputOptions, qualityPrefix.Length()));
+ int newquality = -1;
+ if (PR_sscanf(value.get(), "%d", &newquality) == 1) {
+ if (newquality >= 0 && newquality <= 100) {
+ quality = newquality;
+ } else {
+ NS_WARNING(
+ "Quality value out of range, should be 0-100,"
+ " using default");
+ }
+ } else {
+ NS_WARNING(
+ "Quality value invalid, should be integer 0-100,"
+ " using default");
+ }
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+ }
+
+ UniquePtr<uint8_t[]> rowptr;
+ if (aInputFormat == INPUT_FORMAT_RGBA ||
+ aInputFormat == INPUT_FORMAT_HOSTARGB) {
+ rowptr = MakeUniqueFallible<uint8_t[]>(aWidth * 3);
+ if (NS_WARN_IF(!rowptr)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ }
+
+ jpeg_compress_struct cinfo;
+
+ // We set up the normal JPEG error routines, then override error_exit.
+ // This must be done before the call to create_compress
+ encoder_error_mgr errmgr;
+ cinfo.err = jpeg_std_error(&errmgr.pub);
+ errmgr.pub.error_exit = nsJPEGEncoderInternal::errorExit;
+ // Establish the setjmp return context for my_error_exit to use.
+ if (setjmp(errmgr.setjmp_buffer)) {
+ // If we get here, the JPEG code has signaled an error.
+ // We need to clean up the JPEG object, close the input file, and return.
+ return NS_ERROR_FAILURE;
+ }
+
+ jpeg_create_compress(&cinfo);
+ cinfo.image_width = aWidth;
+ cinfo.image_height = aHeight;
+ cinfo.input_components = 3;
+ cinfo.in_color_space = JCS_RGB;
+ cinfo.data_precision = 8;
+
+ jpeg_set_defaults(&cinfo);
+ jpeg_set_quality(&cinfo, quality, 1); // quality here is 0-100
+ if (quality >= 90) {
+ int i;
+ for (i = 0; i < MAX_COMPONENTS; i++) {
+ cinfo.comp_info[i].h_samp_factor = 1;
+ cinfo.comp_info[i].v_samp_factor = 1;
+ }
+ }
+
+ // set up the destination manager
+ jpeg_destination_mgr destmgr;
+ destmgr.init_destination = nsJPEGEncoderInternal::initDestination;
+ destmgr.empty_output_buffer = nsJPEGEncoderInternal::emptyOutputBuffer;
+ destmgr.term_destination = nsJPEGEncoderInternal::termDestination;
+ cinfo.dest = &destmgr;
+ cinfo.client_data = this;
+
+ jpeg_start_compress(&cinfo, 1);
+
+ // feed it the rows
+ if (aInputFormat == INPUT_FORMAT_RGB) {
+ while (cinfo.next_scanline < cinfo.image_height) {
+ const uint8_t* row = &aData[cinfo.next_scanline * aStride];
+ jpeg_write_scanlines(&cinfo, const_cast<uint8_t**>(&row), 1);
+ }
+ } else if (aInputFormat == INPUT_FORMAT_RGBA) {
+ MOZ_ASSERT(rowptr);
+ uint8_t* row = rowptr.get();
+ while (cinfo.next_scanline < cinfo.image_height) {
+ ConvertRGBARow(&aData[cinfo.next_scanline * aStride], row, aWidth);
+ jpeg_write_scanlines(&cinfo, &row, 1);
+ }
+ } else if (aInputFormat == INPUT_FORMAT_HOSTARGB) {
+ MOZ_ASSERT(rowptr);
+ uint8_t* row = rowptr.get();
+ while (cinfo.next_scanline < cinfo.image_height) {
+ ConvertHostARGBRow(&aData[cinfo.next_scanline * aStride], row, aWidth);
+ jpeg_write_scanlines(&cinfo, &row, 1);
+ }
+ }
+
+ jpeg_finish_compress(&cinfo);
+ jpeg_destroy_compress(&cinfo);
+
+ mFinished = true;
+ NotifyListener();
+
+ // if output callback can't get enough memory, it will free our buffer
+ if (!mImageBuffer) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::StartImageEncode(uint32_t aWidth, uint32_t aHeight,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+// Returns the number of bytes in the image buffer used.
+NS_IMETHODIMP
+nsJPEGEncoder::GetImageBufferUsed(uint32_t* aOutputSize) {
+ NS_ENSURE_ARG_POINTER(aOutputSize);
+ *aOutputSize = mImageBufferUsed;
+ return NS_OK;
+}
+
+// Returns a pointer to the start of the image buffer
+NS_IMETHODIMP
+nsJPEGEncoder::GetImageBuffer(char** aOutputBuffer) {
+ NS_ENSURE_ARG_POINTER(aOutputBuffer);
+ *aOutputBuffer = reinterpret_cast<char*>(mImageBuffer);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::AddImageFrame(const uint8_t* aData, uint32_t aLength,
+ uint32_t aWidth, uint32_t aHeight,
+ uint32_t aStride, uint32_t aFrameFormat,
+ const nsAString& aFrameOptions) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::EndImageEncode() { return NS_ERROR_NOT_IMPLEMENTED; }
+
+NS_IMETHODIMP
+nsJPEGEncoder::Close() {
+ if (mImageBuffer != nullptr) {
+ free(mImageBuffer);
+ mImageBuffer = nullptr;
+ mImageBufferSize = 0;
+ mImageBufferUsed = 0;
+ mImageBufferReadPoint = 0;
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::Available(uint64_t* _retval) {
+ if (!mImageBuffer) {
+ return NS_BASE_STREAM_CLOSED;
+ }
+
+ *_retval = mImageBufferUsed - mImageBufferReadPoint;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::StreamStatus() {
+ return mImageBuffer ? NS_OK : NS_BASE_STREAM_CLOSED;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::Read(char* aBuf, uint32_t aCount, uint32_t* _retval) {
+ return ReadSegments(NS_CopySegmentToBuffer, aBuf, aCount, _retval);
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::ReadSegments(nsWriteSegmentFun aWriter, void* aClosure,
+ uint32_t aCount, uint32_t* _retval) {
+ // Avoid another thread reallocing the buffer underneath us
+ ReentrantMonitorAutoEnter autoEnter(mReentrantMonitor);
+
+ uint32_t maxCount = mImageBufferUsed - mImageBufferReadPoint;
+ if (maxCount == 0) {
+ *_retval = 0;
+ return mFinished ? NS_OK : NS_BASE_STREAM_WOULD_BLOCK;
+ }
+
+ if (aCount > maxCount) {
+ aCount = maxCount;
+ }
+ nsresult rv = aWriter(
+ this, aClosure,
+ reinterpret_cast<const char*>(mImageBuffer + mImageBufferReadPoint), 0,
+ aCount, _retval);
+ if (NS_SUCCEEDED(rv)) {
+ NS_ASSERTION(*_retval <= aCount, "bad write count");
+ mImageBufferReadPoint += *_retval;
+ }
+
+ // errors returned from the writer end here!
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::IsNonBlocking(bool* _retval) {
+ *_retval = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::AsyncWait(nsIInputStreamCallback* aCallback, uint32_t aFlags,
+ uint32_t aRequestedCount, nsIEventTarget* aTarget) {
+ if (aFlags != 0) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+ }
+
+ if (mCallback || mCallbackTarget) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ mCallbackTarget = aTarget;
+ // 0 means "any number of bytes except 0"
+ mNotifyThreshold = aRequestedCount;
+ if (!aRequestedCount) {
+ mNotifyThreshold = 1024; // 1 KB seems good. We don't want to
+ // notify incessantly
+ }
+
+ // We set the callback absolutely last, because NotifyListener uses it to
+ // determine if someone needs to be notified. If we don't set it last,
+ // NotifyListener might try to fire off a notification to a null target
+ // which will generally cause non-threadsafe objects to be used off the
+ // main thread
+ mCallback = aCallback;
+
+ // What we are being asked for may be present already
+ NotifyListener();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsJPEGEncoder::CloseWithStatus(nsresult aStatus) { return Close(); }
+
+// nsJPEGEncoder::ConvertHostARGBRow
+//
+// Our colors are stored with premultiplied alphas, but we need
+// an output with no alpha in machine-independent byte order.
+//
+// See gfx/cairo/cairo/src/cairo-png.c
+void nsJPEGEncoder::ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth) {
+ for (uint32_t x = 0; x < aPixelWidth; x++) {
+ const uint32_t& pixelIn = ((const uint32_t*)(aSrc))[x];
+ uint8_t* pixelOut = &aDest[x * 3];
+
+ pixelOut[0] = (pixelIn & 0xff0000) >> 16;
+ pixelOut[1] = (pixelIn & 0x00ff00) >> 8;
+ pixelOut[2] = (pixelIn & 0x0000ff) >> 0;
+ }
+}
+
+/**
+ * nsJPEGEncoder::ConvertRGBARow
+ *
+ * Input is RGBA, output is RGB, so we should alpha-premultiply.
+ */
+void nsJPEGEncoder::ConvertRGBARow(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth) {
+ for (uint32_t x = 0; x < aPixelWidth; x++) {
+ const uint8_t* pixelIn = &aSrc[x * 4];
+ uint8_t* pixelOut = &aDest[x * 3];
+
+ uint8_t alpha = pixelIn[3];
+ pixelOut[0] = gfxPreMultiply(pixelIn[0], alpha);
+ pixelOut[1] = gfxPreMultiply(pixelIn[1], alpha);
+ pixelOut[2] = gfxPreMultiply(pixelIn[2], alpha);
+ }
+}
+
+void nsJPEGEncoder::NotifyListener() {
+ // We might call this function on multiple threads (any threads that call
+ // AsyncWait and any that do encoding) so we lock to avoid notifying the
+ // listener twice about the same data (which generally leads to a truncated
+ // image).
+ ReentrantMonitorAutoEnter autoEnter(mReentrantMonitor);
+
+ if (mCallback &&
+ (mImageBufferUsed - mImageBufferReadPoint >= mNotifyThreshold ||
+ mFinished)) {
+ nsCOMPtr<nsIInputStreamCallback> callback;
+ if (mCallbackTarget) {
+ callback = NS_NewInputStreamReadyEvent("nsJPEGEncoder::NotifyListener",
+ mCallback, mCallbackTarget);
+ } else {
+ callback = mCallback;
+ }
+
+ NS_ASSERTION(callback, "Shouldn't fail to make the callback");
+ // Null the callback first because OnInputStreamReady could reenter
+ // AsyncWait
+ mCallback = nullptr;
+ mCallbackTarget = nullptr;
+ mNotifyThreshold = 0;
+
+ callback->OnInputStreamReady(this);
+ }
+}
+
+/* static */
+void nsJPEGEncoderInternal::initDestination(jpeg_compress_struct* cinfo) {
+ nsJPEGEncoder* that = static_cast<nsJPEGEncoder*>(cinfo->client_data);
+ NS_ASSERTION(!that->mImageBuffer, "Image buffer already initialized");
+
+ that->mImageBufferSize = 8192;
+ that->mImageBuffer = (uint8_t*)malloc(that->mImageBufferSize);
+ that->mImageBufferUsed = 0;
+
+ cinfo->dest->next_output_byte = that->mImageBuffer;
+ cinfo->dest->free_in_buffer = that->mImageBufferSize;
+}
+
+/* static */
+boolean nsJPEGEncoderInternal::emptyOutputBuffer(jpeg_compress_struct* cinfo) {
+ nsJPEGEncoder* that = static_cast<nsJPEGEncoder*>(cinfo->client_data);
+ NS_ASSERTION(that->mImageBuffer, "No buffer to empty!");
+
+ // When we're reallocing the buffer we need to take the lock to ensure
+ // that nobody is trying to read from the buffer we are destroying
+ ReentrantMonitorAutoEnter autoEnter(that->mReentrantMonitor);
+
+ that->mImageBufferUsed = that->mImageBufferSize;
+
+ // expand buffer, just double size each time
+ uint8_t* newBuf = nullptr;
+ CheckedInt<uint32_t> bufSize =
+ CheckedInt<uint32_t>(that->mImageBufferSize) * 2;
+ if (bufSize.isValid()) {
+ that->mImageBufferSize = bufSize.value();
+ newBuf = (uint8_t*)realloc(that->mImageBuffer, that->mImageBufferSize);
+ }
+
+ if (!newBuf) {
+ // can't resize, just zero (this will keep us from writing more)
+ free(that->mImageBuffer);
+ that->mImageBuffer = nullptr;
+ that->mImageBufferSize = 0;
+ that->mImageBufferUsed = 0;
+
+ // This seems to be the only way to do errors through the JPEG library. We
+ // pass an nsresult masquerading as an int, which works because the
+ // setjmp() caller casts it back.
+ longjmp(((encoder_error_mgr*)(cinfo->err))->setjmp_buffer,
+ static_cast<int>(NS_ERROR_OUT_OF_MEMORY));
+ }
+ that->mImageBuffer = newBuf;
+
+ cinfo->dest->next_output_byte = &that->mImageBuffer[that->mImageBufferUsed];
+ cinfo->dest->free_in_buffer = that->mImageBufferSize - that->mImageBufferUsed;
+ return 1;
+}
+
+/* static */
+void nsJPEGEncoderInternal::termDestination(jpeg_compress_struct* cinfo) {
+ nsJPEGEncoder* that = static_cast<nsJPEGEncoder*>(cinfo->client_data);
+ if (!that->mImageBuffer) {
+ return;
+ }
+ that->mImageBufferUsed = cinfo->dest->next_output_byte - that->mImageBuffer;
+ NS_ASSERTION(that->mImageBufferUsed < that->mImageBufferSize,
+ "JPEG library busted, got a bad image buffer size");
+ that->NotifyListener();
+}
+
+/* static */
+void nsJPEGEncoderInternal::errorExit(jpeg_common_struct* cinfo) {
+ nsresult error_code;
+ encoder_error_mgr* err = (encoder_error_mgr*)cinfo->err;
+
+ // Convert error to a browser error code
+ switch (cinfo->err->msg_code) {
+ case JERR_OUT_OF_MEMORY:
+ error_code = NS_ERROR_OUT_OF_MEMORY;
+ break;
+ default:
+ error_code = NS_ERROR_FAILURE;
+ }
+
+ // Return control to the setjmp point. We pass an nsresult masquerading as
+ // an int, which works because the setjmp() caller casts it back.
+ longjmp(err->setjmp_buffer, static_cast<int>(error_code));
+}
diff --git a/image/encoders/jpeg/nsJPEGEncoder.h b/image/encoders/jpeg/nsJPEGEncoder.h
new file mode 100644
index 0000000000..df543d957b
--- /dev/null
+++ b/image/encoders/jpeg/nsJPEGEncoder.h
@@ -0,0 +1,74 @@
+/* -*- 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/. */
+
+#ifndef mozilla_image_encoders_jpeg_nsJPEGEncoder_h
+#define mozilla_image_encoders_jpeg_nsJPEGEncoder_h
+
+#include "imgIEncoder.h"
+
+#include "mozilla/ReentrantMonitor.h"
+#include "mozilla/Attributes.h"
+
+#include "nsCOMPtr.h"
+
+struct jpeg_compress_struct;
+struct jpeg_common_struct;
+
+#define NS_JPEGENCODER_CID \
+ { \
+ /* ac2bb8fe-eeeb-4572-b40f-be03932b56e0 */ \
+ 0xac2bb8fe, 0xeeeb, 0x4572, { \
+ 0xb4, 0x0f, 0xbe, 0x03, 0x93, 0x2b, 0x56, 0xe0 \
+ } \
+ }
+
+// Provides JPEG encoding functionality. Use InitFromData() to do the
+// encoding. See that function definition for encoding options.
+class nsJPEGEncoderInternal;
+
+class nsJPEGEncoder final : public imgIEncoder {
+ friend class nsJPEGEncoderInternal;
+ typedef mozilla::ReentrantMonitor ReentrantMonitor;
+
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_IMGIENCODER
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ nsJPEGEncoder();
+
+ private:
+ ~nsJPEGEncoder();
+
+ protected:
+ void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth);
+ void ConvertRGBARow(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth);
+
+ void NotifyListener();
+
+ bool mFinished;
+
+ // image buffer
+ uint8_t* mImageBuffer;
+ uint32_t mImageBufferSize;
+ uint32_t mImageBufferUsed;
+
+ uint32_t mImageBufferReadPoint;
+
+ nsCOMPtr<nsIInputStreamCallback> mCallback;
+ nsCOMPtr<nsIEventTarget> mCallbackTarget;
+ uint32_t mNotifyThreshold;
+
+ // nsJPEGEncoder is designed to allow one thread to pump data into it while
+ // another reads from it. We lock to ensure that the buffer remains
+ // append-only while we read from it (that it is not realloced) and to ensure
+ // that only one thread dispatches a callback for each call to AsyncWait.
+ ReentrantMonitor mReentrantMonitor MOZ_UNANNOTATED;
+};
+
+#endif // mozilla_image_encoders_jpeg_nsJPEGEncoder_h
diff --git a/image/encoders/moz.build b/image/encoders/moz.build
new file mode 100644
index 0000000000..ecb2aa44e0
--- /dev/null
+++ b/image/encoders/moz.build
@@ -0,0 +1,13 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+DIRS += [
+ "ico",
+ "png",
+ "jpeg",
+ "bmp",
+ "webp",
+]
diff --git a/image/encoders/png/moz.build b/image/encoders/png/moz.build
new file mode 100644
index 0000000000..fe26a2368e
--- /dev/null
+++ b/image/encoders/png/moz.build
@@ -0,0 +1,17 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+ "nsPNGEncoder.cpp",
+]
+
+LOCAL_INCLUDES += [
+ "/image",
+]
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+FINAL_LIBRARY = "xul"
diff --git a/image/encoders/png/nsPNGEncoder.cpp b/image/encoders/png/nsPNGEncoder.cpp
new file mode 100644
index 0000000000..f21bab67a6
--- /dev/null
+++ b/image/encoders/png/nsPNGEncoder.cpp
@@ -0,0 +1,820 @@
+/* -*- 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 "ImageLogging.h"
+#include "nsCRT.h"
+#include "nsPNGEncoder.h"
+#include "nsStreamUtils.h"
+#include "nsString.h"
+#include "prprf.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/UniquePtrExtensions.h"
+
+using namespace mozilla;
+
+static LazyLogModule sPNGEncoderLog("PNGEncoder");
+
+NS_IMPL_ISUPPORTS(nsPNGEncoder, imgIEncoder, nsIInputStream,
+ nsIAsyncInputStream)
+
+#define DEFAULT_ZLIB_LEVEL 3
+#define DEFAULT_FILTERS PNG_FILTER_SUB
+
+nsPNGEncoder::nsPNGEncoder()
+ : mPNG(nullptr),
+ mPNGinfo(nullptr),
+ mIsAnimation(false),
+ mFinished(false),
+ mImageBuffer(nullptr),
+ mImageBufferSize(0),
+ mImageBufferUsed(0),
+ mImageBufferReadPoint(0),
+ mCallback(nullptr),
+ mCallbackTarget(nullptr),
+ mNotifyThreshold(0),
+ mReentrantMonitor("nsPNGEncoder.mReentrantMonitor") {}
+
+nsPNGEncoder::~nsPNGEncoder() {
+ if (mImageBuffer) {
+ free(mImageBuffer);
+ mImageBuffer = nullptr;
+ }
+ // don't leak if EndImageEncode wasn't called
+ if (mPNG) {
+ png_destroy_write_struct(&mPNG, &mPNGinfo);
+ }
+}
+
+// nsPNGEncoder::InitFromData
+//
+// One output option is supported: "transparency=none" means that the
+// output PNG will not have an alpha channel, even if the input does.
+//
+// Based partially on gfx/cairo/cairo/src/cairo-png.c
+// See also media/libpng/libpng-manual.txt
+
+NS_IMETHODIMP
+nsPNGEncoder::InitFromData(const uint8_t* aData,
+ uint32_t aLength, // (unused, req'd by JS)
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ NS_ENSURE_ARG(aData);
+ nsresult rv;
+
+ rv = StartImageEncode(aWidth, aHeight, aInputFormat, aOutputOptions);
+ if (!NS_SUCCEEDED(rv)) {
+ return rv;
+ }
+
+ rv = AddImageFrame(aData, aLength, aWidth, aHeight, aStride, aInputFormat,
+ aOutputOptions);
+ if (!NS_SUCCEEDED(rv)) {
+ return rv;
+ }
+
+ rv = EndImageEncode();
+
+ return rv;
+}
+
+// nsPNGEncoder::StartImageEncode
+//
+//
+// See ::InitFromData for other info.
+NS_IMETHODIMP
+nsPNGEncoder::StartImageEncode(uint32_t aWidth, uint32_t aHeight,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ bool useTransparency = true, skipFirstFrame = false;
+ uint32_t numFrames = 1;
+ uint32_t numPlays = 0; // For animations, 0 == forever
+ int zlibLevel = DEFAULT_ZLIB_LEVEL;
+ int filters = DEFAULT_FILTERS;
+
+ // can't initialize more than once
+ if (mImageBuffer != nullptr) {
+ return NS_ERROR_ALREADY_INITIALIZED;
+ }
+
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB)
+ return NS_ERROR_INVALID_ARG;
+
+ // parse and check any provided output options
+ nsresult rv = ParseOptions(aOutputOptions, &useTransparency, &skipFirstFrame,
+ &numFrames, &numPlays, &zlibLevel, &filters,
+ nullptr, nullptr, nullptr, nullptr, nullptr);
+ if (rv != NS_OK) {
+ return rv;
+ }
+
+#ifdef PNG_APNG_SUPPORTED
+ if (numFrames > 1) {
+ mIsAnimation = true;
+ }
+
+#endif
+
+ // initialize
+ mPNG = png_create_write_struct(PNG_LIBPNG_VER_STRING, nullptr, ErrorCallback,
+ WarningCallback);
+ if (!mPNG) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ mPNGinfo = png_create_info_struct(mPNG);
+ if (!mPNGinfo) {
+ png_destroy_write_struct(&mPNG, nullptr);
+ return NS_ERROR_FAILURE;
+ }
+
+ // libpng's error handler jumps back here upon an error.
+ // Note: It's important that all png_* callers do this, or errors
+ // will result in a corrupt time-warped stack.
+ if (setjmp(png_jmpbuf(mPNG))) {
+ png_destroy_write_struct(&mPNG, &mPNGinfo);
+ return NS_ERROR_FAILURE;
+ }
+
+#ifdef PNG_WRITE_CUSTOMIZE_COMPRESSION_SUPPORTED
+ png_set_compression_level(mPNG, zlibLevel);
+#endif
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ png_set_filter(mPNG, PNG_FILTER_TYPE_BASE, filters);
+#endif
+
+ // Set up to read the data into our image buffer, start out with an 8K
+ // estimated size. Note: we don't have to worry about freeing this data
+ // in this function. It will be freed on object destruction.
+ mImageBufferSize = 8192;
+ mImageBuffer = (uint8_t*)malloc(mImageBufferSize);
+ if (!mImageBuffer) {
+ png_destroy_write_struct(&mPNG, &mPNGinfo);
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ mImageBufferUsed = 0;
+
+ // set our callback for libpng to give us the data
+ png_set_write_fn(mPNG, this, WriteCallback, nullptr);
+
+ // include alpha?
+ int colorType;
+ if ((aInputFormat == INPUT_FORMAT_HOSTARGB ||
+ aInputFormat == INPUT_FORMAT_RGBA) &&
+ useTransparency)
+ colorType = PNG_COLOR_TYPE_RGB_ALPHA;
+ else
+ colorType = PNG_COLOR_TYPE_RGB;
+
+ png_set_IHDR(mPNG, mPNGinfo, aWidth, aHeight, 8, colorType,
+ PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
+ PNG_FILTER_TYPE_DEFAULT);
+
+#ifdef PNG_APNG_SUPPORTED
+ if (mIsAnimation) {
+ png_set_first_frame_is_hidden(mPNG, mPNGinfo, skipFirstFrame);
+ png_set_acTL(mPNG, mPNGinfo, numFrames, numPlays);
+ }
+#endif
+
+ // XXX: support PLTE, gAMA, tRNS, bKGD?
+
+ png_write_info(mPNG, mPNGinfo);
+
+ return NS_OK;
+}
+
+// Returns the number of bytes in the image buffer used.
+NS_IMETHODIMP
+nsPNGEncoder::GetImageBufferUsed(uint32_t* aOutputSize) {
+ NS_ENSURE_ARG_POINTER(aOutputSize);
+ *aOutputSize = mImageBufferUsed;
+ return NS_OK;
+}
+
+// Returns a pointer to the start of the image buffer
+NS_IMETHODIMP
+nsPNGEncoder::GetImageBuffer(char** aOutputBuffer) {
+ NS_ENSURE_ARG_POINTER(aOutputBuffer);
+ *aOutputBuffer = reinterpret_cast<char*>(mImageBuffer);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::AddImageFrame(const uint8_t* aData,
+ uint32_t aLength, // (unused, req'd by JS)
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aFrameOptions) {
+ bool useTransparency = true;
+ int filters = DEFAULT_FILTERS;
+ uint32_t delay_ms = 500;
+#ifdef PNG_APNG_SUPPORTED
+ uint32_t dispose_op = PNG_DISPOSE_OP_NONE;
+ uint32_t blend_op = PNG_BLEND_OP_SOURCE;
+#else
+ uint32_t dispose_op;
+ uint32_t blend_op;
+#endif
+ uint32_t x_offset = 0, y_offset = 0;
+
+ // must be initialized
+ if (mImageBuffer == nullptr) {
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ // EndImageEncode was done, or some error occurred earlier
+ if (!mPNG) {
+ return NS_BASE_STREAM_CLOSED;
+ }
+
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB)
+ return NS_ERROR_INVALID_ARG;
+
+ // libpng's error handler jumps back here upon an error.
+ if (setjmp(png_jmpbuf(mPNG))) {
+ png_destroy_write_struct(&mPNG, &mPNGinfo);
+ return NS_ERROR_FAILURE;
+ }
+
+ // parse and check any provided output options
+ nsresult rv = ParseOptions(aFrameOptions, &useTransparency, nullptr, nullptr,
+ nullptr, nullptr, &filters, &dispose_op, &blend_op,
+ &delay_ms, &x_offset, &y_offset);
+ if (rv != NS_OK) {
+ return rv;
+ }
+
+#ifdef PNG_APNG_SUPPORTED
+ if (mIsAnimation) {
+ // XXX the row pointers arg (#3) is unused, can it be removed?
+ png_write_frame_head(mPNG, mPNGinfo, nullptr, aWidth, aHeight, x_offset,
+ y_offset, delay_ms, 1000, dispose_op, blend_op);
+ }
+#endif
+
+ // Stride is the padded width of each row, so it better be longer
+ // (I'm afraid people will not understand what stride means, so
+ // check it well)
+ if ((aInputFormat == INPUT_FORMAT_RGB && aStride < aWidth * 3) ||
+ ((aInputFormat == INPUT_FORMAT_RGBA ||
+ aInputFormat == INPUT_FORMAT_HOSTARGB) &&
+ aStride < aWidth * 4)) {
+ NS_WARNING("Invalid stride for InitFromData/AddImageFrame");
+ return NS_ERROR_INVALID_ARG;
+ }
+
+#ifdef PNG_WRITE_FILTER_SUPPORTED
+ png_set_filter(mPNG, PNG_FILTER_TYPE_BASE, filters);
+#endif
+
+ // write each row: if we add more input formats, we may want to
+ // generalize the conversions
+ if (aInputFormat == INPUT_FORMAT_HOSTARGB) {
+ // PNG requires RGBA with post-multiplied alpha, so we need to
+ // convert
+ UniquePtr<uint8_t[]> row = MakeUniqueFallible<uint8_t[]>(aWidth * 4);
+ if (NS_WARN_IF(!row)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ for (uint32_t y = 0; y < aHeight; y++) {
+ ConvertHostARGBRow(&aData[y * aStride], row.get(), aWidth,
+ useTransparency);
+ png_write_row(mPNG, row.get());
+ }
+ } else if (aInputFormat == INPUT_FORMAT_RGBA && !useTransparency) {
+ // RBGA, but we need to strip the alpha
+ UniquePtr<uint8_t[]> row = MakeUniqueFallible<uint8_t[]>(aWidth * 4);
+ if (NS_WARN_IF(!row)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ for (uint32_t y = 0; y < aHeight; y++) {
+ StripAlpha(&aData[y * aStride], row.get(), aWidth);
+ png_write_row(mPNG, row.get());
+ }
+ } else if (aInputFormat == INPUT_FORMAT_RGB ||
+ aInputFormat == INPUT_FORMAT_RGBA) {
+ // simple RBG(A), no conversion needed
+ for (uint32_t y = 0; y < aHeight; y++) {
+ png_write_row(mPNG, (uint8_t*)&aData[y * aStride]);
+ }
+
+ } else {
+ MOZ_ASSERT_UNREACHABLE("Bad format type");
+ return NS_ERROR_INVALID_ARG;
+ }
+
+#ifdef PNG_APNG_SUPPORTED
+ if (mIsAnimation) {
+ png_write_frame_tail(mPNG, mPNGinfo);
+ }
+#endif
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::EndImageEncode() {
+ // must be initialized
+ if (mImageBuffer == nullptr) {
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ // EndImageEncode has already been called, or some error
+ // occurred earlier
+ if (!mPNG) {
+ return NS_BASE_STREAM_CLOSED;
+ }
+
+ // libpng's error handler jumps back here upon an error.
+ if (setjmp(png_jmpbuf(mPNG))) {
+ png_destroy_write_struct(&mPNG, &mPNGinfo);
+ return NS_ERROR_FAILURE;
+ }
+
+ png_write_end(mPNG, mPNGinfo);
+ png_destroy_write_struct(&mPNG, &mPNGinfo);
+
+ mFinished = true;
+ NotifyListener();
+
+ // if output callback can't get enough memory, it will free our buffer
+ if (!mImageBuffer) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ return NS_OK;
+}
+
+nsresult nsPNGEncoder::ParseOptions(const nsAString& aOptions,
+ bool* useTransparency, bool* skipFirstFrame,
+ uint32_t* numFrames, uint32_t* numPlays,
+ int* zlibLevel, int* filters,
+ uint32_t* frameDispose,
+ uint32_t* frameBlend, uint32_t* frameDelay,
+ uint32_t* offsetX, uint32_t* offsetY) {
+#ifdef PNG_APNG_SUPPORTED
+ // Make a copy of aOptions, because strtok() will modify it.
+ nsAutoCString optionsCopy;
+ optionsCopy.Assign(NS_ConvertUTF16toUTF8(aOptions));
+ char* options = optionsCopy.BeginWriting();
+
+ while (char* token = nsCRT::strtok(options, ";", &options)) {
+ // If there's an '=' character, split the token around it.
+ char* equals = token;
+ char* value = nullptr;
+ while (*equals != '=' && *equals) {
+ ++equals;
+ }
+ if (*equals == '=') {
+ value = equals + 1;
+ }
+
+ if (value) {
+ *equals = '\0'; // temporary null
+ }
+
+ // transparency=[yes|no|none]
+ if (nsCRT::strcmp(token, "transparency") == 0 && useTransparency) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (nsCRT::strcmp(value, "none") == 0 ||
+ nsCRT::strcmp(value, "no") == 0) {
+ *useTransparency = false;
+ } else if (nsCRT::strcmp(value, "yes") == 0) {
+ *useTransparency = true;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // skipfirstframe=[yes|no]
+ } else if (nsCRT::strcmp(token, "skipfirstframe") == 0 && skipFirstFrame) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (nsCRT::strcmp(value, "no") == 0) {
+ *skipFirstFrame = false;
+ } else if (nsCRT::strcmp(value, "yes") == 0) {
+ *skipFirstFrame = true;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // frames=#
+ } else if (nsCRT::strcmp(token, "frames") == 0 && numFrames) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (PR_sscanf(value, "%u", numFrames) != 1) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // frames=0 is nonsense.
+ if (*numFrames == 0) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // plays=#
+ } else if (nsCRT::strcmp(token, "plays") == 0 && numPlays) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // plays=0 to loop forever, otherwise play sequence specified
+ // number of times
+ if (PR_sscanf(value, "%u", numPlays) != 1) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // png-zlib-level=#
+ } else if (nsCRT::strcmp(token, "png-zlib-level") == 0) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ int localZlibLevel = DEFAULT_ZLIB_LEVEL;
+ if (PR_sscanf(value, "%d", &localZlibLevel) != 1) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // zlib-level 0-9 are the only valid values
+ if (localZlibLevel < 0 || localZlibLevel > 9) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (zlibLevel) {
+ *zlibLevel = localZlibLevel;
+ }
+
+ // png-filter=[no_filters|none|sub|up|avg|paeth|fast|all]
+ } else if (nsCRT::strcmp(token, "png-filter") == 0) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (nsCRT::strcmp(value, "no_filters") == 0) {
+ if (filters) {
+ *filters = PNG_NO_FILTERS;
+ }
+ } else if (nsCRT::strcmp(value, "none") == 0) {
+ if (filters) {
+ *filters = PNG_FILTER_NONE;
+ }
+ } else if (nsCRT::strcmp(value, "sub") == 0) {
+ if (filters) {
+ *filters = PNG_FILTER_SUB;
+ }
+ } else if (nsCRT::strcmp(value, "up") == 0) {
+ if (filters) {
+ *filters = PNG_FILTER_UP;
+ }
+ } else if (nsCRT::strcmp(value, "avg") == 0) {
+ if (filters) {
+ *filters = PNG_FILTER_AVG;
+ }
+ } else if (nsCRT::strcmp(value, "paeth") == 0) {
+ if (filters) {
+ *filters = PNG_FILTER_PAETH;
+ }
+ } else if (nsCRT::strcmp(value, "fast") == 0) {
+ if (filters) {
+ *filters = PNG_FAST_FILTERS;
+ }
+ } else if (nsCRT::strcmp(value, "all") == 0) {
+ if (filters) {
+ *filters = PNG_ALL_FILTERS;
+ }
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // dispose=[none|background|previous]
+ } else if (nsCRT::strcmp(token, "dispose") == 0 && frameDispose) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (nsCRT::strcmp(value, "none") == 0) {
+ *frameDispose = PNG_DISPOSE_OP_NONE;
+ } else if (nsCRT::strcmp(value, "background") == 0) {
+ *frameDispose = PNG_DISPOSE_OP_BACKGROUND;
+ } else if (nsCRT::strcmp(value, "previous") == 0) {
+ *frameDispose = PNG_DISPOSE_OP_PREVIOUS;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // blend=[source|over]
+ } else if (nsCRT::strcmp(token, "blend") == 0 && frameBlend) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (nsCRT::strcmp(value, "source") == 0) {
+ *frameBlend = PNG_BLEND_OP_SOURCE;
+ } else if (nsCRT::strcmp(value, "over") == 0) {
+ *frameBlend = PNG_BLEND_OP_OVER;
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // delay=# (in ms)
+ } else if (nsCRT::strcmp(token, "delay") == 0 && frameDelay) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (PR_sscanf(value, "%u", frameDelay) != 1) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // xoffset=#
+ } else if (nsCRT::strcmp(token, "xoffset") == 0 && offsetX) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (PR_sscanf(value, "%u", offsetX) != 1) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // yoffset=#
+ } else if (nsCRT::strcmp(token, "yoffset") == 0 && offsetY) {
+ if (!value) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (PR_sscanf(value, "%u", offsetY) != 1) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // unknown token name
+ } else
+ return NS_ERROR_INVALID_ARG;
+
+ if (value) {
+ *equals = '='; // restore '=' so strtok doesn't get lost
+ }
+ }
+
+#endif
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::Close() {
+ if (mImageBuffer != nullptr) {
+ free(mImageBuffer);
+ mImageBuffer = nullptr;
+ mImageBufferSize = 0;
+ mImageBufferUsed = 0;
+ mImageBufferReadPoint = 0;
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::Available(uint64_t* _retval) {
+ if (!mImageBuffer) {
+ return NS_BASE_STREAM_CLOSED;
+ }
+
+ *_retval = mImageBufferUsed - mImageBufferReadPoint;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::StreamStatus() {
+ return mImageBuffer ? NS_OK : NS_BASE_STREAM_CLOSED;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::Read(char* aBuf, uint32_t aCount, uint32_t* _retval) {
+ return ReadSegments(NS_CopySegmentToBuffer, aBuf, aCount, _retval);
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::ReadSegments(nsWriteSegmentFun aWriter, void* aClosure,
+ uint32_t aCount, uint32_t* _retval) {
+ // Avoid another thread reallocing the buffer underneath us
+ ReentrantMonitorAutoEnter autoEnter(mReentrantMonitor);
+
+ uint32_t maxCount = mImageBufferUsed - mImageBufferReadPoint;
+ if (maxCount == 0) {
+ *_retval = 0;
+ return mFinished ? NS_OK : NS_BASE_STREAM_WOULD_BLOCK;
+ }
+
+ if (aCount > maxCount) {
+ aCount = maxCount;
+ }
+
+ nsresult rv = aWriter(
+ this, aClosure,
+ reinterpret_cast<const char*>(mImageBuffer + mImageBufferReadPoint), 0,
+ aCount, _retval);
+ if (NS_SUCCEEDED(rv)) {
+ NS_ASSERTION(*_retval <= aCount, "bad write count");
+ mImageBufferReadPoint += *_retval;
+ }
+
+ // errors returned from the writer end here!
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::IsNonBlocking(bool* _retval) {
+ *_retval = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::AsyncWait(nsIInputStreamCallback* aCallback, uint32_t aFlags,
+ uint32_t aRequestedCount, nsIEventTarget* aTarget) {
+ if (aFlags != 0) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+ }
+
+ if (mCallback || mCallbackTarget) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ mCallbackTarget = aTarget;
+ // 0 means "any number of bytes except 0"
+ mNotifyThreshold = aRequestedCount;
+ if (!aRequestedCount) {
+ mNotifyThreshold = 1024; // We don't want to notify incessantly
+ }
+
+ // We set the callback absolutely last, because NotifyListener uses it to
+ // determine if someone needs to be notified. If we don't set it last,
+ // NotifyListener might try to fire off a notification to a null target
+ // which will generally cause non-threadsafe objects to be used off the main
+ // thread
+ mCallback = aCallback;
+
+ // What we are being asked for may be present already
+ NotifyListener();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsPNGEncoder::CloseWithStatus(nsresult aStatus) { return Close(); }
+
+// nsPNGEncoder::ConvertHostARGBRow
+//
+// Our colors are stored with premultiplied alphas, but PNGs use
+// post-multiplied alpha. This swaps to PNG-style alpha.
+//
+// Copied from gfx/cairo/cairo/src/cairo-png.c
+
+void nsPNGEncoder::ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth,
+ bool aUseTransparency) {
+ uint32_t pixelStride = aUseTransparency ? 4 : 3;
+ for (uint32_t x = 0; x < aPixelWidth; x++) {
+ const uint32_t& pixelIn = ((const uint32_t*)(aSrc))[x];
+ uint8_t* pixelOut = &aDest[x * pixelStride];
+
+ uint8_t alpha = (pixelIn & 0xff000000) >> 24;
+ pixelOut[pixelStride - 1] = alpha; // overwritten below if pixelStride == 3
+ if (alpha == 255) {
+ pixelOut[0] = (pixelIn & 0xff0000) >> 16;
+ pixelOut[1] = (pixelIn & 0x00ff00) >> 8;
+ pixelOut[2] = (pixelIn & 0x0000ff);
+ } else if (alpha == 0) {
+ pixelOut[0] = pixelOut[1] = pixelOut[2] = 0;
+ } else {
+ pixelOut[0] = (((pixelIn & 0xff0000) >> 16) * 255 + alpha / 2) / alpha;
+ pixelOut[1] = (((pixelIn & 0x00ff00) >> 8) * 255 + alpha / 2) / alpha;
+ pixelOut[2] = (((pixelIn & 0x0000ff)) * 255 + alpha / 2) / alpha;
+ }
+ }
+}
+
+// nsPNGEncoder::StripAlpha
+//
+// Input is RGBA, output is RGB
+
+void nsPNGEncoder::StripAlpha(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth) {
+ for (uint32_t x = 0; x < aPixelWidth; x++) {
+ const uint8_t* pixelIn = &aSrc[x * 4];
+ uint8_t* pixelOut = &aDest[x * 3];
+ pixelOut[0] = pixelIn[0];
+ pixelOut[1] = pixelIn[1];
+ pixelOut[2] = pixelIn[2];
+ }
+}
+
+// nsPNGEncoder::WarningCallback
+
+void nsPNGEncoder::WarningCallback(png_structp png_ptr,
+ png_const_charp warning_msg) {
+ MOZ_LOG(sPNGEncoderLog, LogLevel::Warning,
+ ("libpng warning: %s\n", warning_msg));
+}
+
+// nsPNGEncoder::ErrorCallback
+
+void nsPNGEncoder::ErrorCallback(png_structp png_ptr,
+ png_const_charp error_msg) {
+ MOZ_LOG(sPNGEncoderLog, LogLevel::Error, ("libpng error: %s\n", error_msg));
+ png_longjmp(png_ptr, 1);
+}
+
+// nsPNGEncoder::WriteCallback
+
+void // static
+nsPNGEncoder::WriteCallback(png_structp png, png_bytep data, png_size_t size) {
+ nsPNGEncoder* that = static_cast<nsPNGEncoder*>(png_get_io_ptr(png));
+ if (!that->mImageBuffer) {
+ return;
+ }
+
+ CheckedUint32 sizeNeeded = CheckedUint32(that->mImageBufferUsed) + size;
+ if (!sizeNeeded.isValid()) {
+ // Take the lock to ensure that nobody is trying to read from the buffer
+ // we are destroying
+ ReentrantMonitorAutoEnter autoEnter(that->mReentrantMonitor);
+
+ that->NullOutImageBuffer();
+ return;
+ }
+
+ if (sizeNeeded.value() > that->mImageBufferSize) {
+ // When we're reallocing the buffer we need to take the lock to ensure
+ // that nobody is trying to read from the buffer we are destroying
+ ReentrantMonitorAutoEnter autoEnter(that->mReentrantMonitor);
+
+ while (sizeNeeded.value() > that->mImageBufferSize) {
+ // expand buffer, just double each time
+ CheckedUint32 bufferSize = CheckedUint32(that->mImageBufferSize) * 2;
+ if (!bufferSize.isValid()) {
+ that->NullOutImageBuffer();
+ return;
+ }
+ that->mImageBufferSize *= 2;
+ uint8_t* newBuf =
+ (uint8_t*)realloc(that->mImageBuffer, that->mImageBufferSize);
+ if (!newBuf) {
+ // can't resize, just zero (this will keep us from writing more)
+ that->NullOutImageBuffer();
+ return;
+ }
+ that->mImageBuffer = newBuf;
+ }
+ }
+
+ memcpy(&that->mImageBuffer[that->mImageBufferUsed], data, size);
+ that->mImageBufferUsed += size;
+ that->NotifyListener();
+}
+
+void nsPNGEncoder::NullOutImageBuffer() {
+ mReentrantMonitor.AssertCurrentThreadIn();
+
+ free(mImageBuffer);
+ mImageBuffer = nullptr;
+ mImageBufferSize = 0;
+ mImageBufferUsed = 0;
+}
+
+void nsPNGEncoder::NotifyListener() {
+ // We might call this function on multiple threads (any threads that call
+ // AsyncWait and any that do encoding) so we lock to avoid notifying the
+ // listener twice about the same data (which generally leads to a truncated
+ // image).
+ ReentrantMonitorAutoEnter autoEnter(mReentrantMonitor);
+
+ if (mCallback &&
+ (mImageBufferUsed - mImageBufferReadPoint >= mNotifyThreshold ||
+ mFinished)) {
+ nsCOMPtr<nsIInputStreamCallback> callback;
+ if (mCallbackTarget) {
+ callback = NS_NewInputStreamReadyEvent("nsPNGEncoder::NotifyListener",
+ mCallback, mCallbackTarget);
+ } else {
+ callback = mCallback;
+ }
+
+ NS_ASSERTION(callback, "Shouldn't fail to make the callback");
+ // Null the callback first because OnInputStreamReady could reenter
+ // AsyncWait
+ mCallback = nullptr;
+ mCallbackTarget = nullptr;
+ mNotifyThreshold = 0;
+
+ callback->OnInputStreamReady(this);
+ }
+}
diff --git a/image/encoders/png/nsPNGEncoder.h b/image/encoders/png/nsPNGEncoder.h
new file mode 100644
index 0000000000..76d695ccfa
--- /dev/null
+++ b/image/encoders/png/nsPNGEncoder.h
@@ -0,0 +1,79 @@
+/* -*- 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/. */
+
+#ifndef mozilla_image_encoders_png_nsPNGEncoder_h
+#define mozilla_image_encoders_png_nsPNGEncoder_h
+
+#include <png.h>
+
+#include "imgIEncoder.h"
+#include "nsCOMPtr.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ReentrantMonitor.h"
+
+#define NS_PNGENCODER_CID \
+ { /* 38d1592e-b81e-432b-86f8-471878bbfe07 */ \
+ 0x38d1592e, 0xb81e, 0x432b, { \
+ 0x86, 0xf8, 0x47, 0x18, 0x78, 0xbb, 0xfe, 0x07 \
+ } \
+ }
+
+// Provides PNG encoding functionality. Use InitFromData() to do the
+// encoding. See that function definition for encoding options.
+
+class nsPNGEncoder final : public imgIEncoder {
+ typedef mozilla::ReentrantMonitor ReentrantMonitor;
+
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_IMGIENCODER
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ nsPNGEncoder();
+
+ protected:
+ ~nsPNGEncoder();
+ nsresult ParseOptions(const nsAString& aOptions, bool* useTransparency,
+ bool* skipFirstFrame, uint32_t* numAnimatedFrames,
+ uint32_t* numIterations, int* zlibLevel, int* filters,
+ uint32_t* frameDispose, uint32_t* frameBlend,
+ uint32_t* frameDelay, uint32_t* offsetX,
+ uint32_t* offsetY);
+ void ConvertHostARGBRow(const uint8_t* aSrc, uint8_t* aDest,
+ uint32_t aPixelWidth, bool aUseTransparency);
+ void StripAlpha(const uint8_t* aSrc, uint8_t* aDest, uint32_t aPixelWidth);
+ static void WarningCallback(png_structp png_ptr, png_const_charp warning_msg);
+ static void ErrorCallback(png_structp png_ptr, png_const_charp error_msg);
+ static void WriteCallback(png_structp png, png_bytep data, png_size_t size);
+ void NullOutImageBuffer();
+ void NotifyListener();
+
+ png_struct* mPNG;
+ png_info* mPNGinfo;
+
+ bool mIsAnimation;
+ bool mFinished;
+
+ // image buffer
+ uint8_t* mImageBuffer;
+ uint32_t mImageBufferSize;
+ uint32_t mImageBufferUsed;
+
+ uint32_t mImageBufferReadPoint;
+
+ nsCOMPtr<nsIInputStreamCallback> mCallback;
+ nsCOMPtr<nsIEventTarget> mCallbackTarget;
+ uint32_t mNotifyThreshold;
+
+ // nsPNGEncoder is designed to allow one thread to pump data into it while
+ // another reads from it. We lock to ensure that the buffer remains
+ // append-only while we read from it (that it is not realloced) and to
+ // ensure that only one thread dispatches a callback for each call to
+ // AsyncWait.
+ ReentrantMonitor mReentrantMonitor MOZ_UNANNOTATED;
+};
+#endif // mozilla_image_encoders_png_nsPNGEncoder_h
diff --git a/image/encoders/webp/moz.build b/image/encoders/webp/moz.build
new file mode 100644
index 0000000000..4363caa79f
--- /dev/null
+++ b/image/encoders/webp/moz.build
@@ -0,0 +1,15 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+ "nsWebPEncoder.cpp",
+]
+
+LOCAL_INCLUDES += [
+ "/image",
+]
+
+FINAL_LIBRARY = "xul"
diff --git a/image/encoders/webp/nsWebPEncoder.cpp b/image/encoders/webp/nsWebPEncoder.cpp
new file mode 100644
index 0000000000..72ac1388e9
--- /dev/null
+++ b/image/encoders/webp/nsWebPEncoder.cpp
@@ -0,0 +1,342 @@
+/* -*- 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 "ImageLogging.h"
+#include "nsCRT.h"
+#include "nsWebPEncoder.h"
+#include "nsStreamUtils.h"
+#include "nsString.h"
+#include "prprf.h"
+#include "mozilla/CheckedInt.h"
+#include "mozilla/UniquePtrExtensions.h"
+
+using namespace mozilla;
+
+// static LazyLogModule sWEBPEncoderLog("WEBPEncoder");
+
+NS_IMPL_ISUPPORTS(nsWebPEncoder, imgIEncoder, nsIInputStream,
+ nsIAsyncInputStream)
+
+nsWebPEncoder::nsWebPEncoder()
+ : mFinished(false),
+ mImageBuffer(nullptr),
+ mImageBufferSize(0),
+ mImageBufferUsed(0),
+ mImageBufferReadPoint(0),
+ mCallback(nullptr),
+ mCallbackTarget(nullptr),
+ mNotifyThreshold(0),
+ mReentrantMonitor("nsWebPEncoder.mReentrantMonitor") {}
+
+nsWebPEncoder::~nsWebPEncoder() {
+ if (mImageBuffer) {
+ WebPFree(mImageBuffer);
+ mImageBuffer = nullptr;
+ mImageBufferSize = 0;
+ mImageBufferUsed = 0;
+ mImageBufferReadPoint = 0;
+ }
+}
+
+// nsWebPEncoder::InitFromData
+//
+// One output option is supported: "quality=X" where X is an integer in the
+// range 0-100. Higher values for X give better quality.
+
+NS_IMETHODIMP
+nsWebPEncoder::InitFromData(const uint8_t* aData,
+ uint32_t aLength, // (unused, req'd by JS)
+ uint32_t aWidth, uint32_t aHeight, uint32_t aStride,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ NS_ENSURE_ARG(aData);
+
+ // validate input format
+ if (aInputFormat != INPUT_FORMAT_RGB && aInputFormat != INPUT_FORMAT_RGBA &&
+ aInputFormat != INPUT_FORMAT_HOSTARGB)
+ return NS_ERROR_INVALID_ARG;
+
+ // Stride is the padded width of each row, so it better be longer (I'm afraid
+ // people will not understand what stride means, so check it well)
+ if ((aInputFormat == INPUT_FORMAT_RGB && aStride < aWidth * 3) ||
+ ((aInputFormat == INPUT_FORMAT_RGBA ||
+ aInputFormat == INPUT_FORMAT_HOSTARGB) &&
+ aStride < aWidth * 4)) {
+ NS_WARNING("Invalid stride for InitFromData");
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ // can't initialize more than once
+ if (mImageBuffer != nullptr) {
+ return NS_ERROR_ALREADY_INITIALIZED;
+ }
+
+ // options: we only have one option so this is easy
+ int quality = 92;
+ if (aOutputOptions.Length() > 0) {
+ // have options string
+ const nsString qualityPrefix(u"quality="_ns);
+ if (aOutputOptions.Length() > qualityPrefix.Length() &&
+ StringBeginsWith(aOutputOptions, qualityPrefix)) {
+ // have quality string
+ nsCString value = NS_ConvertUTF16toUTF8(
+ Substring(aOutputOptions, qualityPrefix.Length()));
+ int newquality = -1;
+ if (PR_sscanf(value.get(), "%d", &newquality) == 1) {
+ if (newquality >= 0 && newquality <= 100) {
+ quality = newquality;
+ } else {
+ NS_WARNING(
+ "Quality value out of range, should be 0-100,"
+ " using default");
+ }
+ } else {
+ NS_WARNING(
+ "Quality value invalid, should be integer 0-100,"
+ " using default");
+ }
+ } else {
+ return NS_ERROR_INVALID_ARG;
+ }
+ }
+
+ size_t size = 0;
+
+ CheckedInt32 width = CheckedInt32(aWidth);
+ CheckedInt32 height = CheckedInt32(aHeight);
+ CheckedInt32 stride = CheckedInt32(aStride);
+ if (!width.isValid() || !height.isValid() || !stride.isValid() ||
+ !(CheckedUint32(aStride) * CheckedUint32(aHeight)).isValid()) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ if (aInputFormat == INPUT_FORMAT_RGB) {
+ size = quality == 100
+ ? WebPEncodeLosslessRGB(aData, width.value(), height.value(),
+ stride.value(), &mImageBuffer)
+ : WebPEncodeRGB(aData, width.value(), height.value(),
+ stride.value(), quality, &mImageBuffer);
+ } else if (aInputFormat == INPUT_FORMAT_RGBA) {
+ size = quality == 100
+ ? WebPEncodeLosslessRGBA(aData, width.value(), height.value(),
+ stride.value(), &mImageBuffer)
+ : WebPEncodeRGBA(aData, width.value(), height.value(),
+ stride.value(), quality, &mImageBuffer);
+ } else if (aInputFormat == INPUT_FORMAT_HOSTARGB) {
+ UniquePtr<uint8_t[]> aDest =
+ MakeUniqueFallible<uint8_t[]>(aStride * aHeight);
+ if (NS_WARN_IF(!aDest)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ for (uint32_t y = 0; y < aHeight; y++) {
+ for (uint32_t x = 0; x < aWidth; x++) {
+ const uint32_t& pixelIn =
+ ((const uint32_t*)(aData))[y * aStride / 4 + x];
+ uint8_t* pixelOut = &aDest[y * aStride + x * 4];
+
+ uint8_t alpha = (pixelIn & 0xff000000) >> 24;
+ pixelOut[3] = alpha;
+ if (alpha == 255) {
+ pixelOut[0] = (pixelIn & 0xff0000) >> 16;
+ pixelOut[1] = (pixelIn & 0x00ff00) >> 8;
+ pixelOut[2] = (pixelIn & 0x0000ff);
+ } else if (alpha == 0) {
+ pixelOut[0] = pixelOut[1] = pixelOut[2] = 0;
+ } else {
+ pixelOut[0] =
+ (((pixelIn & 0xff0000) >> 16) * 255 + alpha / 2) / alpha;
+ pixelOut[1] = (((pixelIn & 0x00ff00) >> 8) * 255 + alpha / 2) / alpha;
+ pixelOut[2] = (((pixelIn & 0x0000ff)) * 255 + alpha / 2) / alpha;
+ }
+ }
+ }
+
+ size =
+ quality == 100
+ ? WebPEncodeLosslessRGBA(aDest.get(), width.value(), height.value(),
+ stride.value(), &mImageBuffer)
+ : WebPEncodeRGBA(aDest.get(), width.value(), height.value(),
+ stride.value(), quality, &mImageBuffer);
+ }
+
+ mFinished = true;
+
+ if (size == 0) {
+ return NS_ERROR_FAILURE;
+ }
+
+ mImageBufferUsed = size;
+
+ return NS_OK;
+}
+
+// nsWebPEncoder::StartImageEncode
+//
+//
+// See ::InitFromData for other info.
+NS_IMETHODIMP
+nsWebPEncoder::StartImageEncode(uint32_t aWidth, uint32_t aHeight,
+ uint32_t aInputFormat,
+ const nsAString& aOutputOptions) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+// Returns the number of bytes in the image buffer used.
+NS_IMETHODIMP
+nsWebPEncoder::GetImageBufferUsed(uint32_t* aOutputSize) {
+ NS_ENSURE_ARG_POINTER(aOutputSize);
+ *aOutputSize = mImageBufferUsed;
+ return NS_OK;
+}
+
+// Returns a pointer to the start of the image buffer
+NS_IMETHODIMP
+nsWebPEncoder::GetImageBuffer(char** aOutputBuffer) {
+ NS_ENSURE_ARG_POINTER(aOutputBuffer);
+ *aOutputBuffer = reinterpret_cast<char*>(mImageBuffer);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::AddImageFrame(const uint8_t* aData,
+ uint32_t aLength, // (unused, req'd by JS)
+ uint32_t aWidth, uint32_t aHeight,
+ uint32_t aStride, uint32_t aInputFormat,
+ const nsAString& aFrameOptions) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::EndImageEncode() { return NS_ERROR_NOT_IMPLEMENTED; }
+
+NS_IMETHODIMP
+nsWebPEncoder::Close() {
+ if (mImageBuffer) {
+ WebPFree(mImageBuffer);
+ mImageBuffer = nullptr;
+ mImageBufferSize = 0;
+ mImageBufferUsed = 0;
+ mImageBufferReadPoint = 0;
+ }
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::Available(uint64_t* _retval) {
+ if (!mImageBuffer) {
+ return NS_BASE_STREAM_CLOSED;
+ }
+
+ *_retval = mImageBufferUsed - mImageBufferReadPoint;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::StreamStatus() {
+ return mImageBuffer ? NS_OK : NS_BASE_STREAM_CLOSED;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::Read(char* aBuf, uint32_t aCount, uint32_t* _retval) {
+ return ReadSegments(NS_CopySegmentToBuffer, aBuf, aCount, _retval);
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::ReadSegments(nsWriteSegmentFun aWriter, void* aClosure,
+ uint32_t aCount, uint32_t* _retval) {
+ // Avoid another thread reallocing the buffer underneath us
+ ReentrantMonitorAutoEnter autoEnter(mReentrantMonitor);
+
+ uint32_t maxCount = mImageBufferUsed - mImageBufferReadPoint;
+ if (maxCount == 0) {
+ *_retval = 0;
+ return mFinished ? NS_OK : NS_BASE_STREAM_WOULD_BLOCK;
+ }
+
+ if (aCount > maxCount) {
+ aCount = maxCount;
+ }
+ nsresult rv = aWriter(
+ this, aClosure,
+ reinterpret_cast<const char*>(mImageBuffer + mImageBufferReadPoint), 0,
+ aCount, _retval);
+ if (NS_SUCCEEDED(rv)) {
+ NS_ASSERTION(*_retval <= aCount, "bad write count");
+ mImageBufferReadPoint += *_retval;
+ }
+
+ // errors returned from the writer end here!
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::IsNonBlocking(bool* _retval) {
+ *_retval = true;
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::AsyncWait(nsIInputStreamCallback* aCallback, uint32_t aFlags,
+ uint32_t aRequestedCount, nsIEventTarget* aTarget) {
+ if (aFlags != 0) {
+ return NS_ERROR_NOT_IMPLEMENTED;
+ }
+
+ if (mCallback || mCallbackTarget) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ mCallbackTarget = aTarget;
+ // 0 means "any number of bytes except 0"
+ mNotifyThreshold = aRequestedCount;
+ if (!aRequestedCount) {
+ mNotifyThreshold = 1024; // 1 KB seems good. We don't want to
+ // notify incessantly
+ }
+
+ // We set the callback absolutely last, because NotifyListener uses it to
+ // determine if someone needs to be notified. If we don't set it last,
+ // NotifyListener might try to fire off a notification to a null target
+ // which will generally cause non-threadsafe objects to be used off the
+ // main thread
+ mCallback = aCallback;
+
+ // What we are being asked for may be present already
+ NotifyListener();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsWebPEncoder::CloseWithStatus(nsresult aStatus) { return Close(); }
+
+void nsWebPEncoder::NotifyListener() {
+ // We might call this function on multiple threads (any threads that call
+ // AsyncWait and any that do encoding) so we lock to avoid notifying the
+ // listener twice about the same data (which generally leads to a truncated
+ // image).
+ ReentrantMonitorAutoEnter autoEnter(mReentrantMonitor);
+
+ if (mCallback &&
+ (mImageBufferUsed - mImageBufferReadPoint >= mNotifyThreshold ||
+ mFinished)) {
+ nsCOMPtr<nsIInputStreamCallback> callback;
+ if (mCallbackTarget) {
+ callback = NS_NewInputStreamReadyEvent("nsWebPEncoder::NotifyListener",
+ mCallback, mCallbackTarget);
+ } else {
+ callback = mCallback;
+ }
+
+ NS_ASSERTION(callback, "Shouldn't fail to make the callback");
+ // Null the callback first because OnInputStreamReady could reenter
+ // AsyncWait
+ mCallback = nullptr;
+ mCallbackTarget = nullptr;
+ mNotifyThreshold = 0;
+
+ callback->OnInputStreamReady(this);
+ }
+}
diff --git a/image/encoders/webp/nsWebPEncoder.h b/image/encoders/webp/nsWebPEncoder.h
new file mode 100644
index 0000000000..8628d12388
--- /dev/null
+++ b/image/encoders/webp/nsWebPEncoder.h
@@ -0,0 +1,63 @@
+/* -*- 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/. */
+
+#ifndef mozilla_image_encoders_webp_nsWebPEncoder_h
+#define mozilla_image_encoders_webp_nsWebPEncoder_h
+
+#include "webp/encode.h"
+
+#include "imgIEncoder.h"
+#include "nsCOMPtr.h"
+
+#include "mozilla/Attributes.h"
+#include "mozilla/ReentrantMonitor.h"
+
+#define NS_WEBPENCODER_CID \
+ { /* a8e5a8e5-bebf-4512-9f50-e41e4748ce28 */ \
+ 0xa8e5a8e5, 0xbebf, 0x4512, { \
+ 0x9f, 0x50, 0xe4, 0x1e, 0x47, 0x48, 0xce, 0x28 \
+ } \
+ }
+
+// Provides WEBP encoding functionality. Use InitFromData() to do the
+// encoding. See that function definition for encoding options.
+
+class nsWebPEncoder final : public imgIEncoder {
+ typedef mozilla::ReentrantMonitor ReentrantMonitor;
+
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_IMGIENCODER
+ NS_DECL_NSIINPUTSTREAM
+ NS_DECL_NSIASYNCINPUTSTREAM
+
+ nsWebPEncoder();
+
+ protected:
+ ~nsWebPEncoder();
+
+ void NotifyListener();
+
+ bool mFinished;
+
+ // image buffer
+ uint8_t* mImageBuffer;
+ uint32_t mImageBufferSize;
+ uint32_t mImageBufferUsed;
+
+ uint32_t mImageBufferReadPoint;
+
+ nsCOMPtr<nsIInputStreamCallback> mCallback;
+ nsCOMPtr<nsIEventTarget> mCallbackTarget;
+ uint32_t mNotifyThreshold;
+
+ // nsWebPEncoder is designed to allow one thread to pump data into it while
+ // another reads from it. We lock to ensure that the buffer remains
+ // append-only while we read from it (that it is not realloced) and to
+ // ensure that only one thread dispatches a callback for each call to
+ // AsyncWait.
+ ReentrantMonitor mReentrantMonitor MOZ_UNANNOTATED;
+};
+#endif // mozilla_image_encoders_webp_nsWebPEncoder_h
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