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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
3 files changed, 881 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
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