diff options
Diffstat (limited to 'image/encoders/bmp')
| -rw-r--r-- | image/encoders/bmp/moz.build | 15 | ||||
| -rw-r--r-- | image/encoders/bmp/nsBMPEncoder.cpp | 764 | ||||
| -rw-r--r-- | image/encoders/bmp/nsBMPEncoder.h | 157 |
3 files changed, 936 insertions, 0 deletions
diff --git a/image/encoders/bmp/moz.build b/image/encoders/bmp/moz.build new file mode 100644 index 000000000..f061d067a --- /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 000000000..af959a46e --- /dev/null +++ b/image/encoders/bmp/nsBMPEncoder.cpp @@ -0,0 +1,764 @@ +/* -*- 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 "prprf.h" +#include "nsString.h" +#include "nsStreamUtils.h" +#include "nsTArray.h" +#include "mozilla/CheckedInt.h" + +using namespace mozilla; +using namespace mozilla::image; +using namespace mozilla::image::bmp; + +NS_IMPL_ISUPPORTS(nsBMPEncoder, imgIEncoder, nsIInputStream, + nsIAsyncInputStream) + +nsBMPEncoder::nsBMPEncoder() : mImageBufferStart(nullptr), + mImageBufferCurr(0), + mImageBufferSize(0), + mImageBufferReadPoint(0), + mFinished(false), + mCallback(nullptr), + mCallbackTarget(nullptr), + mNotifyThreshold(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 { + NS_NOTREACHED("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; + if (!ParseString(NS_ConvertUTF16toUTF8(aOptions), ';', nameValuePairs)) { + return NS_ERROR_INVALID_ARG; + } + + // 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; + if (!ParseString(nameValuePairs[i], '=', nameValuePair)) { + return NS_ERROR_INVALID_ARG; + } + 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; +} + +// [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(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 infor 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 000000000..b90af4d19 --- /dev/null +++ b/image/encoders/bmp/nsBMPEncoder.h @@ -0,0 +1,157 @@ +/* -*- 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 "BMPHeaders.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 |