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Jakub Melka 2019-05-07 18:21:22 +02:00
parent 0447b9e3a1
commit 3358d49240
29 changed files with 4648 additions and 4 deletions
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OpenJPEG/include/openjpeg-2.3/openjpeg.h Normal file
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OpenJPEG/include/openjpeg-2.3/opj_config.h Normal file
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@ -0,0 +1,10 @@
/* create opj_config.h for CMake */
#define OPJ_HAVE_STDINT_H 1
/*--------------------------------------------------------------------------*/
/* OpenJPEG Versioning */
/* Version number. */
#define OPJ_VERSION_MAJOR 2
#define OPJ_VERSION_MINOR 3
#define OPJ_VERSION_BUILD 1

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OpenJPEG/include/openjpeg-2.3/opj_stdint.h Normal file
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@ -0,0 +1,52 @@
/*
* The copyright in this software is being made available under the 2-clauses
* BSD License, included below. This software may be subject to other third
* party and contributor rights, including patent rights, and no such rights
* are granted under this license.
*
* Copyright (c) 2012, Mathieu Malaterre <mathieu.malaterre@gmail.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef OPJ_STDINT_H
#define OPJ_STDINT_H
#include "opj_config.h"
#ifdef OPJ_HAVE_STDINT_H
#include <stdint.h>
#else
#if defined(_WIN32)
typedef signed __int8 int8_t;
typedef unsigned __int8 uint8_t;
typedef signed __int16 int16_t;
typedef unsigned __int16 uint16_t;
typedef signed __int32 int32_t;
typedef unsigned __int32 uint32_t;
typedef signed __int64 int64_t;
typedef unsigned __int64 uint64_t;
#else
#error unsupported platform
#endif
#endif
#endif /* OPJ_STDINT_H */

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OpenJPEG/lib/openjpeg-2.3/OpenJPEGConfig.cmake Normal file
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@ -0,0 +1,53 @@
#-----------------------------------------------------------------------------
#
# OPENJPEGConfig.cmake - CMake configuration file for external projects.
#
# This file is configured by OPENJPEG and used by the UseOPENJPEG.cmake
# module to load OPENJPEG's settings for an external project.
# The OPENJPEG version number.
set(OPENJPEG_MAJOR_VERSION "2")
set(OPENJPEG_MINOR_VERSION "3")
set(OPENJPEG_BUILD_VERSION "1")
# The libraries.
set(OPENJPEG_LIBRARIES "openjp2")
# The CMake macros dir.
set(OPENJPEG_CMAKE_DIR "lib/openjpeg-2.3")
# The configuration options.
set(OPENJPEG_BUILD_SHARED_LIBS "ON")
# The "use" file.
set(OPENJPEG_USE_FILE "")
get_filename_component(SELF_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
if(EXISTS ${SELF_DIR}/OpenJPEGTargets.cmake)
# This is an install tree
include(${SELF_DIR}/OpenJPEGTargets.cmake)
# We find a relative path from the PKG directory to header files.
set(PKG_DIR "C:/Program Files/OPENJPEG/lib/openjpeg-2.3")
set(INC_DIR "C:/Program Files/OPENJPEG/include/openjpeg-2.3")
file(RELATIVE_PATH PKG_TO_INC_RPATH "${PKG_DIR}" "${INC_DIR}")
get_filename_component(OPENJPEG_INCLUDE_DIRS "${SELF_DIR}/${PKG_TO_INC_RPATH}" ABSOLUTE)
else()
if(EXISTS ${SELF_DIR}/OpenJPEGExports.cmake)
# This is a build tree
set( OPENJPEG_INCLUDE_DIRS )
include(${SELF_DIR}/OpenJPEGExports.cmake)
else()
message(FATAL_ERROR "ooops")
endif()
endif()
set(OPENJPEG_USE_FILE ${SELF_DIR}/UseOPENJPEG.cmake)
# Backward compatible part:
set(OPENJPEG_FOUND TRUE)

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OpenJPEG/lib/openjpeg-2.3/OpenJPEGTargets-release.cmake Normal file
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@ -0,0 +1,46 @@
#----------------------------------------------------------------
# Generated CMake target import file for configuration "Release".
#----------------------------------------------------------------
# Commands may need to know the format version.
set(CMAKE_IMPORT_FILE_VERSION 1)
# Import target "openjp2" for configuration "Release"
set_property(TARGET openjp2 APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(openjp2 PROPERTIES
IMPORTED_IMPLIB_RELEASE "${_IMPORT_PREFIX}/lib/openjp2.lib"
IMPORTED_LOCATION_RELEASE "${_IMPORT_PREFIX}/bin/openjp2.dll"
)
list(APPEND _IMPORT_CHECK_TARGETS openjp2 )
list(APPEND _IMPORT_CHECK_FILES_FOR_openjp2 "${_IMPORT_PREFIX}/lib/openjp2.lib" "${_IMPORT_PREFIX}/bin/openjp2.dll" )
# Import target "opj_decompress" for configuration "Release"
set_property(TARGET opj_decompress APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(opj_decompress PROPERTIES
IMPORTED_LOCATION_RELEASE "${_IMPORT_PREFIX}/bin/opj_decompress.exe"
)
list(APPEND _IMPORT_CHECK_TARGETS opj_decompress )
list(APPEND _IMPORT_CHECK_FILES_FOR_opj_decompress "${_IMPORT_PREFIX}/bin/opj_decompress.exe" )
# Import target "opj_compress" for configuration "Release"
set_property(TARGET opj_compress APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(opj_compress PROPERTIES
IMPORTED_LOCATION_RELEASE "${_IMPORT_PREFIX}/bin/opj_compress.exe"
)
list(APPEND _IMPORT_CHECK_TARGETS opj_compress )
list(APPEND _IMPORT_CHECK_FILES_FOR_opj_compress "${_IMPORT_PREFIX}/bin/opj_compress.exe" )
# Import target "opj_dump" for configuration "Release"
set_property(TARGET opj_dump APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(opj_dump PROPERTIES
IMPORTED_LOCATION_RELEASE "${_IMPORT_PREFIX}/bin/opj_dump.exe"
)
list(APPEND _IMPORT_CHECK_TARGETS opj_dump )
list(APPEND _IMPORT_CHECK_FILES_FOR_opj_dump "${_IMPORT_PREFIX}/bin/opj_dump.exe" )
# Commands beyond this point should not need to know the version.
set(CMAKE_IMPORT_FILE_VERSION)

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OpenJPEG/lib/openjpeg-2.3/OpenJPEGTargets.cmake Normal file
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@ -0,0 +1,98 @@
# Generated by CMake
if("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" LESS 2.5)
message(FATAL_ERROR "CMake >= 2.6.0 required")
endif()
cmake_policy(PUSH)
cmake_policy(VERSION 2.6)
#----------------------------------------------------------------
# Generated CMake target import file.
#----------------------------------------------------------------
# Commands may need to know the format version.
set(CMAKE_IMPORT_FILE_VERSION 1)
# Protect against multiple inclusion, which would fail when already imported targets are added once more.
set(_targetsDefined)
set(_targetsNotDefined)
set(_expectedTargets)
foreach(_expectedTarget openjp2 opj_decompress opj_compress opj_dump)
list(APPEND _expectedTargets ${_expectedTarget})
if(NOT TARGET ${_expectedTarget})
list(APPEND _targetsNotDefined ${_expectedTarget})
endif()
if(TARGET ${_expectedTarget})
list(APPEND _targetsDefined ${_expectedTarget})
endif()
endforeach()
if("${_targetsDefined}" STREQUAL "${_expectedTargets}")
unset(_targetsDefined)
unset(_targetsNotDefined)
unset(_expectedTargets)
set(CMAKE_IMPORT_FILE_VERSION)
cmake_policy(POP)
return()
endif()
if(NOT "${_targetsDefined}" STREQUAL "")
message(FATAL_ERROR "Some (but not all) targets in this export set were already defined.\nTargets Defined: ${_targetsDefined}\nTargets not yet defined: ${_targetsNotDefined}\n")
endif()
unset(_targetsDefined)
unset(_targetsNotDefined)
unset(_expectedTargets)
# Compute the installation prefix relative to this file.
get_filename_component(_IMPORT_PREFIX "${CMAKE_CURRENT_LIST_FILE}" PATH)
get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
if(_IMPORT_PREFIX STREQUAL "/")
set(_IMPORT_PREFIX "")
endif()
# Create imported target openjp2
add_library(openjp2 SHARED IMPORTED)
# Create imported target opj_decompress
add_executable(opj_decompress IMPORTED)
# Create imported target opj_compress
add_executable(opj_compress IMPORTED)
# Create imported target opj_dump
add_executable(opj_dump IMPORTED)
# Load information for each installed configuration.
get_filename_component(_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
file(GLOB CONFIG_FILES "${_DIR}/OpenJPEGTargets-*.cmake")
foreach(f ${CONFIG_FILES})
include(${f})
endforeach()
# Cleanup temporary variables.
set(_IMPORT_PREFIX)
# Loop over all imported files and verify that they actually exist
foreach(target ${_IMPORT_CHECK_TARGETS} )
foreach(file ${_IMPORT_CHECK_FILES_FOR_${target}} )
if(NOT EXISTS "${file}" )
message(FATAL_ERROR "The imported target \"${target}\" references the file
\"${file}\"
but this file does not exist. Possible reasons include:
* The file was deleted, renamed, or moved to another location.
* An install or uninstall procedure did not complete successfully.
* The installation package was faulty and contained
\"${CMAKE_CURRENT_LIST_FILE}\"
but not all the files it references.
")
endif()
endforeach()
unset(_IMPORT_CHECK_FILES_FOR_${target})
endforeach()
unset(_IMPORT_CHECK_TARGETS)
# This file does not depend on other imported targets which have
# been exported from the same project but in a separate export set.
# Commands beyond this point should not need to know the version.
set(CMAKE_IMPORT_FILE_VERSION)
cmake_policy(POP)

21
PdfForQtLib/PdfForQtLib.pro
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@ -55,7 +55,8 @@ SOURCES += \
sources/pdfrenderingerrorswidget.cpp \
sources/pdffunction.cpp \
sources/pdfnametounicode.cpp \
sources/pdffont.cpp
sources/pdffont.cpp \
sources/pdfimage.cpp
HEADERS += \
sources/pdfobject.h \
@ -84,7 +85,8 @@ HEADERS += \
sources/pdffunction.h \
sources/pdfnametounicode.h \
sources/pdffont.h \
sources/pdfexception.h
sources/pdfexception.h \
sources/pdfimage.h
FORMS += \
sources/pdfrenderingerrorswidget.ui
@ -99,6 +101,21 @@ freetype_lib.files = $$PWD/../FreeType/freetype.dll
freetype_lib.path = $$DESTDIR
INSTALLS += freetype_lib
# Link to OpenJPEG library
LIBS += -L$$PWD/../OpenJPEG/lib/ -lopenjp2
INCLUDEPATH += $$PWD/../OpenJPEG/include/openjpeg-2.3
DEPENDPATH += $$PWD/../OpenJPEG/include/openjpeg-2.3
# Add OpenJPEG to installations
openjpeg_lib.files = $$PWD/../OpenJPEG/openjp2.dll
openjpeg_lib.path = $$DESTDIR
INSTALLS += openjpeg_lib
# Link to Independent JPEG Groups libjpeg
LIBS += -L$$PWD/../libjpeg/bin/ -ljpeg
INCLUDEPATH += $$PWD/../libjpeg/include
DEPENDPATH += $$PWD/../libjpeg/include
# ensure debug info even for RELEASE build
CONFIG += force_debug_info

56
PdfForQtLib/sources/pdfcolorspaces.cpp
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@ -85,6 +85,54 @@ size_t PDFDeviceCMYKColorSpace::getColorComponentCount() const
return 4;
}
QImage PDFAbstractColorSpace::getImage(const PDFImageData& imageData) const
{
if (imageData.isValid())
{
QImage image(imageData.getWidth(), imageData.getHeight(), QImage::Format_RGB888);
image.fill(QColor(Qt::white));
// TODO: Implement images with bits different than 8
Q_ASSERT(imageData.getBitsPerComponent() == 8);
unsigned int componentCount = imageData.getComponents();
if (componentCount != getColorComponentCount())
{
throw PDFParserException(PDFTranslationContext::tr("Invalid colors for color space. Color space has %1 colors. Provided color count is %4.").arg(getColorComponentCount()).arg(componentCount));
}
PDFColor color;
color.resize(componentCount);
for (unsigned int i = 0, rowCount = imageData.getHeight(); i < rowCount; ++i)
{
const unsigned char* rowData = imageData.getRow(i);
unsigned char* outputLine = image.scanLine(i);
for (unsigned int j = 0; j < imageData.getWidth(); ++j)
{
const unsigned char* currentData = rowData + (j * componentCount);
for (unsigned int k = 0; k < componentCount; ++k)
{
constexpr const double COEFFICIENT = 1.0 / 255.0;
color[k] = currentData[k] * COEFFICIENT;
}
QColor transformedColor = getColor(color);
QRgb rgb = transformedColor.rgb();
*outputLine++ = qRed(rgb);
*outputLine++ = qGreen(rgb);
*outputLine++ = qBlue(rgb);
}
}
return image;
}
return QImage();
}
PDFColorSpacePointer PDFAbstractColorSpace::createColorSpace(const PDFDictionary* colorSpaceDictionary,
const PDFDocument* document,
const PDFObject& colorSpace)
@ -708,4 +756,12 @@ PDFColorSpacePointer PDFSeparationColorSpace::createSeparationColorSpace(const P
return PDFColorSpacePointer(new PDFSeparationColorSpace(qMove(colorName), qMove(alternateColorSpace), qMove(tintTransform)));
}
const unsigned char* PDFImageData::getRow(unsigned int rowIndex) const
{
const unsigned char* data = reinterpret_cast<const unsigned char*>(m_data.constData());
Q_ASSERT(rowIndex < m_height);
return data + (rowIndex * m_stride);
}
} // namespace pdf

55
PdfForQtLib/sources/pdfcolorspaces.h
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@ -1,4 +1,4 @@
// Copyright (C) 2019 Jakub Melka
// Copyright (C) 2019 Jakub Melka
//
// This file is part of PdfForQt.
//
@ -22,6 +22,7 @@
#include "pdffunction.h"
#include <QColor>
#include <QImage>
#include <QSharedPointer>
namespace pdf
@ -70,6 +71,57 @@ static constexpr const char* ICCBASED_ALTERNATE = "Alternate";
static constexpr const char* ICCBASED_N = "N";
static constexpr const char* ICCBASED_RANGE = "Range";
/// Image raw data - containing data for image. Image data are row-ordered, and by components.
/// So the row can be for 3-components RGB like 'RGBRGBRGB...RGB', where size of row in bytes is 3 * width of image.
class PDFImageData
{
public:
explicit PDFImageData() :
m_components(0),
m_bitsPerComponent(0),
m_width(0),
m_height(0),
m_stride(0)
{
}
explicit inline PDFImageData(unsigned int components,
unsigned int bitsPerComponent,
unsigned int width,
unsigned int height,
unsigned int stride,
QByteArray data) :
m_components(components),
m_bitsPerComponent(bitsPerComponent),
m_width(width),
m_height(height),
m_stride(stride),
m_data(qMove(data))
{
}
unsigned int getComponents() const { return m_components; }
unsigned int getBitsPerComponent() const { return m_bitsPerComponent; }
unsigned int getWidth() const { return m_width; }
unsigned int getHeight() const { return m_height; }
unsigned int getStride() const { return m_stride; }
bool isValid() const { return m_width && m_height && m_components && m_bitsPerComponent; }
const unsigned char* getRow(unsigned int rowIndex) const;
private:
unsigned int m_components;
unsigned int m_bitsPerComponent;
unsigned int m_width;
unsigned int m_height;
unsigned int m_stride;
QByteArray m_data;
};
using PDFColor3 = std::array<PDFColorComponent, 3>;
/// Matrix for color component multiplication (for example, conversion between some color spaces)
@ -117,6 +169,7 @@ public:
virtual QColor getDefaultColor() const = 0;
virtual QColor getColor(const PDFColor& color) const = 0;
virtual size_t getColorComponentCount() const = 0;
virtual QImage getImage(const PDFImageData& imageData) const;
/// Parses the desired color space. If desired color space is not found, then exception is thrown.
/// If everything is OK, then shared pointer to the new color space is returned.

2
PdfForQtLib/sources/pdffont.cpp
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@ -430,7 +430,7 @@ void PDFRealizedFontImpl::fillTextSequence(const QByteArray& byteArray, TextSequ
if (!glyphIndex)
{
// Try to obtain glyph index from unicode
if (m_face->charmap->encoding == FT_ENCODING_UNICODE)
if (m_face->charmap && m_face->charmap->encoding == FT_ENCODING_UNICODE)
{
glyphIndex = FT_Get_Char_Index(m_face, (*encoding)[static_cast<uint8_t>(byteArray[i])].unicode());
}

356
PdfForQtLib/sources/pdfimage.cpp Normal file
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@ -0,0 +1,356 @@
// Copyright (C) 2019 Jakub Melka
//
// This file is part of PdfForQt.
//
// PdfForQt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// PdfForQt is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
#include "pdfimage.h"
#include "pdfdocument.h"
#include "pdfconstants.h"
#include "pdfexception.h"
#include <openjpeg.h>
#include <jpeglib.h>
namespace pdf
{
struct PDFJPEG2000ImageData
{
const QByteArray* byteArray = nullptr;
OPJ_SIZE_T position = 0;
static OPJ_SIZE_T read(void* p_buffer, OPJ_SIZE_T p_nb_bytes, void* p_user_data);
static OPJ_BOOL seek(OPJ_OFF_T p_nb_bytes, void* p_user_data);
static OPJ_OFF_T skip(OPJ_OFF_T p_nb_bytes, void* p_user_data);
};
struct PDFJPEGDCTSource
{
jpeg_source_mgr sourceManager;
const QByteArray* buffer = nullptr;
};
PDFImage PDFImage::createImage(const PDFDocument* document, const PDFStream* stream, PDFColorSpacePointer colorSpace)
{
PDFImage image;
image.m_colorSpace = colorSpace;
// TODO: Implement ImageMask
// TODO: Implement Mask
// TODO: Implement Decode
// TODO: Implement SMask
// TODO: Implement SMaskInData
const PDFDictionary* dictionary = stream->getDictionary();
QByteArray content = document->getDecodedStream(stream);
PDFDocumentDataLoaderDecorator loader(document);
if (content.isEmpty())
{
throw PDFParserException(PDFTranslationContext::tr("Image has not data."));
}
// Retrieve filters
PDFObject filters;
if (dictionary->hasKey(PDF_STREAM_DICT_FILTER))
{
filters = document->getObject(dictionary->get(PDF_STREAM_DICT_FILTER));
}
else if (dictionary->hasKey(PDF_STREAM_DICT_FILE_FILTER))
{
filters = document->getObject(dictionary->get(PDF_STREAM_DICT_FILE_FILTER));
}
// Retrieve filter parameters
PDFObject filterParameters;
if (dictionary->hasKey(PDF_STREAM_DICT_DECODE_PARMS))
{
filterParameters = document->getObject(dictionary->get(PDF_STREAM_DICT_DECODE_PARMS));
}
else if (dictionary->hasKey(PDF_STREAM_DICT_FDECODE_PARMS))
{
filterParameters = document->getObject(dictionary->get(PDF_STREAM_DICT_FDECODE_PARMS));
}
QByteArray imageFilterName;
if (filters.isName())
{
imageFilterName = filters.getString();
}
else if (filters.isArray())
{
const PDFArray* filterArray = filters.getArray();
const size_t filterCount = filterArray->getCount();
if (filterCount)
{
const PDFObject& object = document->getObject(filterArray->getItem(filterCount - 1));
if (object.isName())
{
imageFilterName = object.getString();
}
}
}
if (imageFilterName == "DCTDecode" || imageFilterName == "DCT")
{
// TODO: Check, if mutex is needed
// Used library is not thread safe. We must use a mutex!
static QMutex mutex;
QMutexLocker lock(&mutex);
int colorTransform = loader.readIntegerFromDictionary(dictionary, "ColorTransform", -1);
jpeg_decompress_struct codec;
jpeg_error_mgr errorManager;
std::memset(&codec, 0, sizeof(jpeg_decompress_struct));
std::memset(&errorManager, 0, sizeof(errorManager));
PDFJPEGDCTSource source;
source.buffer = &content;
std::memset(&source.sourceManager, 0, sizeof(jpeg_source_mgr));
auto errorMethod = [](j_common_ptr ptr)
{
char buffer[JMSG_LENGTH_MAX] = { };
(ptr->err->format_message)(ptr, buffer);
jpeg_destroy(ptr);
throw PDFParserException(PDFTranslationContext::tr("Error reading JPEG (DCT) image: %1.").arg(QString::fromLatin1(buffer)));
};
auto fillInputBufferMethod = [](j_decompress_ptr decompress) -> boolean
{
PDFJPEGDCTSource* source = reinterpret_cast<PDFJPEGDCTSource*>(decompress->src);
if (!source->sourceManager.next_input_byte)
{
const QByteArray* buffer = source->buffer;
source->sourceManager.next_input_byte = reinterpret_cast<const JOCTET*>(buffer->constData());
source->sourceManager.bytes_in_buffer = buffer->size();
return TRUE;
}
return FALSE;
};
auto skipInputDataMethod = [](j_decompress_ptr decompress, long num_bytes)
{
PDFJPEGDCTSource* source = reinterpret_cast<PDFJPEGDCTSource*>(decompress->src);
const size_t skippedBytes = qMin(source->sourceManager.bytes_in_buffer, static_cast<size_t>(num_bytes));
source->sourceManager.next_input_byte += skippedBytes;
source->sourceManager.bytes_in_buffer -= skippedBytes;
};
source.sourceManager.bytes_in_buffer = 0;
source.sourceManager.next_input_byte = nullptr;
source.sourceManager.init_source = [](j_decompress_ptr) { };
source.sourceManager.fill_input_buffer = fillInputBufferMethod;
source.sourceManager.skip_input_data = skipInputDataMethod;
source.sourceManager.resync_to_restart = jpeg_resync_to_restart;
source.sourceManager.term_source = [](j_decompress_ptr) { };
jpeg_std_error(&errorManager);
errorManager.error_exit = errorMethod;
codec.err = &errorManager;
jpeg_create_decompress(&codec);
codec.src = reinterpret_cast<jpeg_source_mgr*>(&source);
if (jpeg_read_header(&codec, TRUE) == JPEG_HEADER_OK)
{
// Determine color transform
if (colorTransform == -1 && codec.saw_Adobe_marker)
{
colorTransform = codec.Adobe_transform;
}
// Set the input transform
if (colorTransform > -1)
{
switch (codec.num_components)
{
case 3:
{
codec.jpeg_color_space = colorTransform ? JCS_YCbCr : JCS_RGB;
break;
}
case 4:
{
codec.jpeg_color_space = colorTransform ? JCS_YCCK : JCS_CMYK;
break;
}
default:
break;
}
}
jpeg_start_decompress(&codec);
const JDIMENSION rowStride = codec.output_width * codec.output_components;
JSAMPARRAY samples = codec.mem->alloc_sarray(reinterpret_cast<j_common_ptr>(&codec), JPOOL_IMAGE, rowStride, 1);
JDIMENSION scanLineCount = codec.output_height;
const unsigned int width = codec.output_width;
const unsigned int height = codec.output_height;
const unsigned int components = codec.output_components;
const unsigned int bitsPerComponent = 8;
QByteArray buffer(rowStride * height, 0);
JSAMPROW rowData = reinterpret_cast<JSAMPROW>(buffer.data());
while (scanLineCount)
{
JDIMENSION readCount = jpeg_read_scanlines(&codec, samples, 1);
std::memcpy(rowData, samples[0], rowStride);
scanLineCount -= readCount;
rowData += rowStride;
}
jpeg_finish_decompress(&codec);
image.m_imageData = PDFImageData(components, bitsPerComponent, width, height, rowStride, qMove(buffer));
}
jpeg_destroy_decompress(&codec);
}
else if (imageFilterName == "JPXDecode")
{
PDFJPEG2000ImageData imageData;
imageData.byteArray = &content;
imageData.position = 0;
opj_stream_t* stream = opj_stream_default_create(OPJ_TRUE);
opj_stream_set_user_data(stream, &imageData, nullptr);
opj_stream_set_user_data_length(stream, sizeof(PDFJPEG2000ImageData));
opj_stream_set_read_function(stream, &PDFJPEG2000ImageData::read);
opj_stream_set_seek_function(stream, &PDFJPEG2000ImageData::seek);
opj_stream_set_skip_function(stream, &PDFJPEG2000ImageData::skip);
opj_dparameters_t decompressParameters;
opj_set_default_decoder_parameters(&decompressParameters);
CODEC_FORMAT formats[] = { OPJ_CODEC_J2K, OPJ_CODEC_JPT, OPJ_CODEC_JP2, OPJ_CODEC_JPP, OPJ_CODEC_JPX };
for (CODEC_FORMAT format : formats)
{
opj_codec_t* codec = opj_create_decompress(format);
if (!codec)
{
// Codec is not present
continue;
}
// Setup the decoder
opj_setup_decoder(codec, &decompressParameters);
// Try to read the header
opj_image_t* image = nullptr;
if (opj_read_header(stream, codec, &image))
{
if (opj_set_decode_area(codec, image, decompressParameters.DA_x0, decompressParameters.DA_y0, decompressParameters.DA_x1, decompressParameters.DA_y1))
{
if (opj_decode(codec, stream, image))
{
if (opj_end_decompress(codec, stream))
{
}
}
}
}
opj_destroy_codec(codec);
}
opj_stream_destroy(stream);
stream = nullptr;
}
return image;
}
QImage PDFImage::getImage() const
{
if (m_colorSpace)
{
return m_colorSpace->getImage(m_imageData);
}
return QImage();
}
OPJ_SIZE_T PDFJPEG2000ImageData::read(void* p_buffer, OPJ_SIZE_T p_nb_bytes, void* p_user_data)
{
PDFJPEG2000ImageData* data = reinterpret_cast<PDFJPEG2000ImageData*>(p_user_data);
// Remaining length
OPJ_OFF_T length = static_cast<OPJ_OFF_T>(data->byteArray->size()) - data->position;
if (length < 0)
{
length = 0;
}
if (length > static_cast<OPJ_OFF_T>(p_nb_bytes))
{
length = static_cast<OPJ_OFF_T>(p_nb_bytes);
}
if (length > 0)
{
std::memcpy(p_buffer, data->byteArray->constData() + data->position, length);
data->position += length;
}
return length;
}
OPJ_BOOL PDFJPEG2000ImageData::seek(OPJ_OFF_T p_nb_bytes, void* p_user_data)
{
PDFJPEG2000ImageData* data = reinterpret_cast<PDFJPEG2000ImageData*>(p_user_data);
if (p_nb_bytes >= data->byteArray->size())
{
return OPJ_FALSE;
}
data->position = p_nb_bytes;
return OPJ_TRUE;
}
OPJ_OFF_T PDFJPEG2000ImageData::skip(OPJ_OFF_T p_nb_bytes, void* p_user_data)
{
PDFJPEG2000ImageData* data = reinterpret_cast<PDFJPEG2000ImageData*>(p_user_data);
// Remaining length
OPJ_OFF_T length = static_cast<OPJ_OFF_T>(data->byteArray->size()) - data->position;
if (length < 0)
{
length = 0;
}
if (length > static_cast<OPJ_OFF_T>(p_nb_bytes))
{
length = static_cast<OPJ_OFF_T>(p_nb_bytes);
}
data->position += length;
return length;
}
} // namespace pdf

54
PdfForQtLib/sources/pdfimage.h Normal file
View File

@ -0,0 +1,54 @@
// Copyright (C) 2019 Jakub Melka
//
// This file is part of PdfForQt.
//
// PdfForQt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// PdfForQt is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
#ifndef PDFIMAGE_H
#define PDFIMAGE_H
#include "pdfcolorspaces.h"
#include <QByteArray>
class QByteArray;
namespace pdf
{
class PDFStream;
class PDFDocument;
class PDFImage
{
public:
/// Creates image from the content and the dictionary. If image can't be created, then exception is thrown.
/// \param document Document
/// \param stream Stream with image
/// \param colorSpace Color space of the image
static PDFImage createImage(const PDFDocument* document, const PDFStream* stream, PDFColorSpacePointer colorSpace);
/// Returns image transformed from image data and color space
QImage getImage() const;
private:
PDFImage() = default;
PDFImageData m_imageData;
PDFColorSpacePointer m_colorSpace;
};
} // namespace pdf
#endif // PDFIMAGE_H

73
PdfForQtLib/sources/pdfpagecontentprocessor.cpp
View File

@ -18,6 +18,7 @@
#include "pdfpagecontentprocessor.h"
#include "pdfdocument.h"
#include "pdfexception.h"
#include "pdfimage.h"
namespace pdf
{
@ -156,6 +157,7 @@ PDFPageContentProcessor::PDFPageContentProcessor(const PDFPage* page, const PDFD
m_fontCache(fontCache),
m_colorSpaceDictionary(nullptr),
m_fontDictionary(nullptr),
m_xobjectDictionary(nullptr),
m_textBeginEndState(0)
{
Q_ASSERT(page);
@ -178,6 +180,7 @@ PDFPageContentProcessor::PDFPageContentProcessor(const PDFPage* page, const PDFD
m_colorSpaceDictionary = getDictionary(COLOR_SPACE_DICTIONARY);
m_fontDictionary = getDictionary("Font");
m_xobjectDictionary = getDictionary("XObject");
}
PDFPageContentProcessor::~PDFPageContentProcessor()
@ -277,6 +280,11 @@ void PDFPageContentProcessor::performClipping(const QPainterPath& path, Qt::Fill
Q_UNUSED(fillRule);
}
void PDFPageContentProcessor::performImagePainting(const QImage& image)
{
Q_UNUSED(image);
}
void PDFPageContentProcessor::performUpdateGraphicsState(const PDFPageContentProcessorState& state)
{
if (state.getStateFlags().testFlag(PDFPageContentProcessorState::StateTextFont) ||
@ -738,6 +746,13 @@ void PDFPageContentProcessor::processCommand(const QByteArray& command)
break;
}
case Operator::PaintXObject:
{
// Do, paint the X Object (image, form, ...)
invokeOperator(&PDFPageContentProcessor::operatorPaintXObject);
break;
}
case Operator::Invalid:
{
m_errorList.append(PDFRenderError(RenderErrorType::Error, PDFTranslationContext::tr("Unknown operator '%1'.").arg(QString::fromLatin1(command))));
@ -1752,6 +1767,64 @@ void PDFPageContentProcessor::operatorTextSetSpacingAndShowText(PDFReal t_w, PDF
operatorTextNextLineShowText(qMove(text));
}
void PDFPageContentProcessor::operatorPaintXObject(PDFPageContentProcessor::PDFOperandName name)
{
if (m_xobjectDictionary)
{
const PDFObject& object = m_document->getObject(m_xobjectDictionary->get(name.name));
if (object.isStream())
{
const PDFStream* stream = object.getStream();
const PDFDictionary* streamDictionary = stream->getDictionary();
PDFDocumentDataLoaderDecorator loader(m_document);
QByteArray subtype = loader.readNameFromDictionary(streamDictionary, "Subtype");
if (subtype == "Image")
{
PDFColorSpacePointer colorSpace;
if (streamDictionary->hasKey("ColorSpace"))
{
const PDFObject& colorSpaceObject = m_document->getObject(streamDictionary->get("ColorSpace"));
if (colorSpaceObject.isName() || colorSpaceObject.isArray())
{
colorSpace = PDFAbstractColorSpace::createColorSpace(m_colorSpaceDictionary, m_document, colorSpaceObject);
}
else if (!colorSpaceObject.isNull())
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Invalid color space of the image."));
}
}
PDFImage pdfImage = PDFImage::createImage(m_document, stream, qMove(colorSpace));
QImage image = pdfImage.getImage();
if (!image.isNull())
{
performImagePainting(image);
}
else
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Can't decode the image."));
}
}
else
{
// TODO: Handle another XObjects
throw PDFRendererException(RenderErrorType::NotImplemented, PDFTranslationContext::tr("Unknown XObject type '%1'.").arg(QString::fromLatin1(subtype)));
}
}
else
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("Invalid format of XObject. Dictionary expected."));
}
}
else
{
throw PDFRendererException(RenderErrorType::Error, PDFTranslationContext::tr("XObject resource dictionary not found."));
}
}
void PDFPageContentProcessor::drawText(const TextSequence& textSequence)
{
if (textSequence.items.empty())

9
PdfForQtLib/sources/pdfpagecontentprocessor.h
View File

@ -355,6 +355,11 @@ protected:
/// clip along the path (intersect with current clipping path).
virtual void performClipping(const QPainterPath& path, Qt::FillRule fillRule);
/// This function has to be implemented in the client drawing implementation, it should
/// draw the image.
/// \param image Image to be painted
virtual void performImagePainting(const QImage& image);
/// This function has to be implemented in the client drawing implementation, it should
/// update the device according to the graphic state change. The flags are set when
/// the value differs from the previous graphic state.
@ -554,6 +559,9 @@ private:
void operatorTextNextLineShowText(PDFOperandString text); ///< ', move to the next line and show text ("string '" is equivalent to "T* string Tj")
void operatorTextSetSpacingAndShowText(PDFReal t_w, PDFReal t_c, PDFOperandString text); ///< ", move to the next line, set spacing and show text (equivalent to sequence "w1 Tw w2 Tc string '")
// XObject: Do
void operatorPaintXObject(PDFOperandName name); ///< Do, paint the X Object (image, form, ...)
// Draws the text using the text sequence
void drawText(const TextSequence& textSequence);
@ -574,6 +582,7 @@ private:
const PDFFontCache* m_fontCache;
const PDFDictionary* m_colorSpaceDictionary;
const PDFDictionary* m_fontDictionary;
const PDFDictionary* m_xobjectDictionary;
// Default color spaces
PDFColorSpacePointer m_deviceGrayColorSpace;

19
PdfForQtLib/sources/pdfpainter.cpp
View File

@ -82,6 +82,25 @@ void PDFPainter::performClipping(const QPainterPath& path, Qt::FillRule fillRule
m_painter->setClipPath(path, Qt::IntersectClip);
}
void PDFPainter::performImagePainting(const QImage& image)
{
m_painter->save();
// TODO: Draw smooth images
QMatrix imageTransform(1.0 / image.width(), 0, 0, 1.0 / image.height(), 0, 0);
QMatrix worldMatrix = imageTransform * m_painter->worldMatrix();
// Because Qt uses opposite axis direction than PDF, then we must transform the y-axis
// to the opposite (so the image is then unchanged)
worldMatrix.translate(0, image.height());
worldMatrix.scale(1, -1);
m_painter->setWorldMatrix(worldMatrix);
m_painter->drawImage(0, 0, image);
m_painter->restore();
}
void PDFPainter::performUpdateGraphicsState(const PDFPageContentProcessorState& state)
{
const PDFPageContentProcessorState::StateFlags flags = state.getStateFlags();

1
PdfForQtLib/sources/pdfpainter.h
View File

@ -51,6 +51,7 @@ public:
protected:
virtual void performPathPainting(const QPainterPath& path, bool stroke, bool fill, bool text, Qt::FillRule fillRule) override;
virtual void performClipping(const QPainterPath& path, Qt::FillRule fillRule) override;
virtual void performImagePainting(const QImage& image);
virtual void performUpdateGraphicsState(const PDFPageContentProcessorState& state) override;
virtual void performSaveGraphicState(ProcessOrder order) override;
virtual void performRestoreGraphicState(ProcessOrder order) override;

378
libjpeg/README Normal file
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@ -0,0 +1,378 @@
The Independent JPEG Group's JPEG software
==========================================
README for release 9c of 14-Jan-2018
====================================
This distribution contains the ninth public release of the Independent JPEG
Group's free JPEG software. You are welcome to redistribute this software and
to use it for any purpose, subject to the conditions under LEGAL ISSUES, below.
This software is the work of Tom Lane, Guido Vollbeding, Philip Gladstone,
Bill Allombert, Jim Boucher, Lee Crocker, Bob Friesenhahn, Ben Jackson,
Julian Minguillon, Luis Ortiz, George Phillips, Davide Rossi, Ge' Weijers,
and other members of the Independent JPEG Group.
IJG is not affiliated with the ISO/IEC JTC1/SC29/WG1 standards committee
(previously known as JPEG, together with ITU-T SG16).
DOCUMENTATION ROADMAP
=====================
This file contains the following sections:
OVERVIEW General description of JPEG and the IJG software.
LEGAL ISSUES Copyright, lack of warranty, terms of distribution.
REFERENCES Where to learn more about JPEG.
ARCHIVE LOCATIONS Where to find newer versions of this software.
ACKNOWLEDGMENTS Special thanks.
FILE FORMAT WARS Software *not* to get.
TO DO Plans for future IJG releases.
Other documentation files in the distribution are:
User documentation:
install.txt How to configure and install the IJG software.
usage.txt Usage instructions for cjpeg, djpeg, jpegtran,
rdjpgcom, and wrjpgcom.
*.1 Unix-style man pages for programs (same info as usage.txt).
wizard.txt Advanced usage instructions for JPEG wizards only.
change.log Version-to-version change highlights.
Programmer and internal documentation:
libjpeg.txt How to use the JPEG library in your own programs.
example.c Sample code for calling the JPEG library.
structure.txt Overview of the JPEG library's internal structure.
filelist.txt Road map of IJG files.
coderules.txt Coding style rules --- please read if you contribute code.
Please read at least the files install.txt and usage.txt. Some information
can also be found in the JPEG FAQ (Frequently Asked Questions) article. See
ARCHIVE LOCATIONS below to find out where to obtain the FAQ article.
If you want to understand how the JPEG code works, we suggest reading one or
more of the REFERENCES, then looking at the documentation files (in roughly
the order listed) before diving into the code.
OVERVIEW
========
This package contains C software to implement JPEG image encoding, decoding,
and transcoding. JPEG (pronounced "jay-peg") is a standardized compression
method for full-color and grayscale images.
This software implements JPEG baseline, extended-sequential, and progressive
compression processes. Provision is made for supporting all variants of these
processes, although some uncommon parameter settings aren't implemented yet.
We have made no provision for supporting the hierarchical or lossless
processes defined in the standard.
We provide a set of library routines for reading and writing JPEG image files,
plus two sample applications "cjpeg" and "djpeg", which use the library to
perform conversion between JPEG and some other popular image file formats.
The library is intended to be reused in other applications.
In order to support file conversion and viewing software, we have included
considerable functionality beyond the bare JPEG coding/decoding capability;
for example, the color quantization modules are not strictly part of JPEG
decoding, but they are essential for output to colormapped file formats or
colormapped displays. These extra functions can be compiled out of the
library if not required for a particular application.
We have also included "jpegtran", a utility for lossless transcoding between
different JPEG processes, and "rdjpgcom" and "wrjpgcom", two simple
applications for inserting and extracting textual comments in JFIF files.
The emphasis in designing this software has been on achieving portability and
flexibility, while also making it fast enough to be useful. In particular,
the software is not intended to be read as a tutorial on JPEG. (See the
REFERENCES section for introductory material.) Rather, it is intended to
be reliable, portable, industrial-strength code. We do not claim to have
achieved that goal in every aspect of the software, but we strive for it.
We welcome the use of this software as a component of commercial products.
No royalty is required, but we do ask for an acknowledgement in product
documentation, as described under LEGAL ISSUES.
LEGAL ISSUES
============
In plain English:
1. We don't promise that this software works. (But if you find any bugs,
please let us know!)
2. You can use this software for whatever you want. You don't have to pay us.
3. You may not pretend that you wrote this software. If you use it in a
program, you must acknowledge somewhere in your documentation that
you've used the IJG code.
In legalese:
The authors make NO WARRANTY or representation, either express or implied,
with respect to this software, its quality, accuracy, merchantability, or
fitness for a particular purpose. This software is provided "AS IS", and you,
its user, assume the entire risk as to its quality and accuracy.
This software is copyright (C) 1991-2018, Thomas G. Lane, Guido Vollbeding.
All Rights Reserved except as specified below.
Permission is hereby granted to use, copy, modify, and distribute this
software (or portions thereof) for any purpose, without fee, subject to these
conditions:
(1) If any part of the source code for this software is distributed, then this
README file must be included, with this copyright and no-warranty notice
unaltered; and any additions, deletions, or changes to the original files
must be clearly indicated in accompanying documentation.
(2) If only executable code is distributed, then the accompanying
documentation must state that "this software is based in part on the work of
the Independent JPEG Group".
(3) Permission for use of this software is granted only if the user accepts
full responsibility for any undesirable consequences; the authors accept
NO LIABILITY for damages of any kind.
These conditions apply to any software derived from or based on the IJG code,
not just to the unmodified library. If you use our work, you ought to
acknowledge us.
Permission is NOT granted for the use of any IJG author's name or company name
in advertising or publicity relating to this software or products derived from
it. This software may be referred to only as "the Independent JPEG Group's
software".
We specifically permit and encourage the use of this software as the basis of
commercial products, provided that all warranty or liability claims are
assumed by the product vendor.
The Unix configuration script "configure" was produced with GNU Autoconf.
It is copyright by the Free Software Foundation but is freely distributable.
The same holds for its supporting scripts (config.guess, config.sub,
ltmain.sh). Another support script, install-sh, is copyright by X Consortium
but is also freely distributable.
The IJG distribution formerly included code to read and write GIF files.
To avoid entanglement with the Unisys LZW patent (now expired), GIF reading
support has been removed altogether, and the GIF writer has been simplified
to produce "uncompressed GIFs". This technique does not use the LZW
algorithm; the resulting GIF files are larger than usual, but are readable
by all standard GIF decoders.
REFERENCES
==========
We recommend reading one or more of these references before trying to
understand the innards of the JPEG software.
The best short technical introduction to the JPEG compression algorithm is
Wallace, Gregory K. "The JPEG Still Picture Compression Standard",
Communications of the ACM, April 1991 (vol. 34 no. 4), pp. 30-44.
(Adjacent articles in that issue discuss MPEG motion picture compression,
applications of JPEG, and related topics.) If you don't have the CACM issue
handy, a PDF file containing a revised version of Wallace's article is
available at http://www.ijg.org/files/Wallace.JPEG.pdf. The file (actually
a preprint for an article that appeared in IEEE Trans. Consumer Electronics)
omits the sample images that appeared in CACM, but it includes corrections
and some added material. Note: the Wallace article is copyright ACM and IEEE,
and it may not be used for commercial purposes.
A somewhat less technical, more leisurely introduction to JPEG can be found in
"The Data Compression Book" by Mark Nelson and Jean-loup Gailly, published by
M&T Books (New York), 2nd ed. 1996, ISBN 1-55851-434-1. This book provides
good explanations and example C code for a multitude of compression methods
including JPEG. It is an excellent source if you are comfortable reading C
code but don't know much about data compression in general. The book's JPEG
sample code is far from industrial-strength, but when you are ready to look
at a full implementation, you've got one here...
The best currently available description of JPEG is the textbook "JPEG Still
Image Data Compression Standard" by William B. Pennebaker and Joan L.
Mitchell, published by Van Nostrand Reinhold, 1993, ISBN 0-442-01272-1.
Price US$59.95, 638 pp. The book includes the complete text of the ISO JPEG
standards (DIS 10918-1 and draft DIS 10918-2).
Although this is by far the most detailed and comprehensive exposition of
JPEG publicly available, we point out that it is still missing an explanation
of the most essential properties and algorithms of the underlying DCT
technology.
If you think that you know about DCT-based JPEG after reading this book,
then you are in delusion. The real fundamentals and corresponding potential
of DCT-based JPEG are not publicly known so far, and that is the reason for
all the mistaken developments taking place in the image coding domain.
The original JPEG standard is divided into two parts, Part 1 being the actual
specification, while Part 2 covers compliance testing methods. Part 1 is
titled "Digital Compression and Coding of Continuous-tone Still Images,
Part 1: Requirements and guidelines" and has document numbers ISO/IEC IS
10918-1, ITU-T T.81. Part 2 is titled "Digital Compression and Coding of
Continuous-tone Still Images, Part 2: Compliance testing" and has document
numbers ISO/IEC IS 10918-2, ITU-T T.83.
IJG JPEG 8 introduced an implementation of the JPEG SmartScale extension
which is specified in two documents: A contributed document at ITU and ISO
with title "ITU-T JPEG-Plus Proposal for Extending ITU-T T.81 for Advanced
Image Coding", April 2006, Geneva, Switzerland. The latest version of this
document is Revision 3. And a contributed document ISO/IEC JTC1/SC29/WG1 N
5799 with title "Evolution of JPEG", June/July 2011, Berlin, Germany.
IJG JPEG 9 introduces a reversible color transform for improved lossless
compression which is described in a contributed document ISO/IEC JTC1/SC29/
WG1 N 6080 with title "JPEG 9 Lossless Coding", June/July 2012, Paris,
France.
The JPEG standard does not specify all details of an interchangeable file
format. For the omitted details we follow the "JFIF" conventions, version 2.
JFIF version 1 has been adopted as Recommendation ITU-T T.871 (05/2011) :
Information technology - Digital compression and coding of continuous-tone
still images: JPEG File Interchange Format (JFIF). It is available as a
free download in PDF file format from http://www.itu.int/rec/T-REC-T.871.
A PDF file of the older JFIF document is available at
http://www.w3.org/Graphics/JPEG/jfif3.pdf.
The TIFF 6.0 file format specification can be obtained by FTP from
ftp://ftp.sgi.com/graphics/tiff/TIFF6.ps.gz. The JPEG incorporation scheme
found in the TIFF 6.0 spec of 3-June-92 has a number of serious problems.
IJG does not recommend use of the TIFF 6.0 design (TIFF Compression tag 6).
Instead, we recommend the JPEG design proposed by TIFF Technical Note #2
(Compression tag 7). Copies of this Note can be obtained from
http://www.ijg.org/files/. It is expected that the next revision
of the TIFF spec will replace the 6.0 JPEG design with the Note's design.
Although IJG's own code does not support TIFF/JPEG, the free libtiff library
uses our library to implement TIFF/JPEG per the Note.
ARCHIVE LOCATIONS
=================
The "official" archive site for this software is www.ijg.org.
The most recent released version can always be found there in
directory "files". This particular version will be archived as
http://www.ijg.org/files/jpegsrc.v9c.tar.gz, and in Windows-compatible
"zip" archive format as http://www.ijg.org/files/jpegsr9c.zip.
The JPEG FAQ (Frequently Asked Questions) article is a source of some
general information about JPEG.
It is available on the World Wide Web at http://www.faqs.org/faqs/jpeg-faq/
and other news.answers archive sites, including the official news.answers
archive at rtfm.mit.edu: ftp://rtfm.mit.edu/pub/usenet/news.answers/jpeg-faq/.
If you don't have Web or FTP access, send e-mail to mail-server@rtfm.mit.edu
with body
send usenet/news.answers/jpeg-faq/part1
send usenet/news.answers/jpeg-faq/part2
ACKNOWLEDGMENTS
===============
Thank to Juergen Bruder for providing me with a copy of the common DCT
algorithm article, only to find out that I had come to the same result
in a more direct and comprehensible way with a more generative approach.
Thank to Istvan Sebestyen and Joan L. Mitchell for inviting me to the
ITU JPEG (Study Group 16) meeting in Geneva, Switzerland.
Thank to Thomas Wiegand and Gary Sullivan for inviting me to the
Joint Video Team (MPEG & ITU) meeting in Geneva, Switzerland.
Thank to Thomas Richter and Daniel Lee for inviting me to the
ISO/IEC JTC1/SC29/WG1 (previously known as JPEG, together with ITU-T SG16)
meeting in Berlin, Germany.
Thank to John Korejwa and Massimo Ballerini for inviting me to
fruitful consultations in Boston, MA and Milan, Italy.
Thank to Hendrik Elstner, Roland Fassauer, Simone Zuck, Guenther
Maier-Gerber, Walter Stoeber, Fred Schmitz, and Norbert Braunagel
for corresponding business development.
Thank to Nico Zschach and Dirk Stelling of the technical support team
at the Digital Images company in Halle for providing me with extra
equipment for configuration tests.
Thank to Richard F. Lyon (then of Foveon Inc.) for fruitful
communication about JPEG configuration in Sigma Photo Pro software.
Thank to Andrew Finkenstadt for hosting the ijg.org site.
Thank to Thomas G. Lane for the original design and development of
this singular software package.
Thank to Lars Goehler, Andreas Heinecke, Sebastian Fuss, Yvonne Roebert,
Andrej Werner, and Ulf-Dietrich Braumann for support and public relations.
FILE FORMAT WARS
================
The ISO/IEC JTC1/SC29/WG1 standards committee (previously known as JPEG,
together with ITU-T SG16) currently promotes different formats containing
the name "JPEG" which is misleading because these formats are incompatible
with original DCT-based JPEG and are based on faulty technologies.
IJG therefore does not and will not support such momentary mistakes
(see REFERENCES).
There exist also distributions under the name "OpenJPEG" promoting such
kind of formats which is misleading because they don't support original
JPEG images.
We have no sympathy for the promotion of inferior formats. Indeed, one of
the original reasons for developing this free software was to help force
convergence on common, interoperable format standards for JPEG files.
Don't use an incompatible file format!
(In any case, our decoder will remain capable of reading existing JPEG
image files indefinitely.)
The ISO committee pretends to be "responsible for the popular JPEG" in their
public reports which is not true because they don't respond to actual
requirements for the maintenance of the original JPEG specification.
Furthermore, the ISO committee pretends to "ensure interoperability" with
their standards which is not true because their "standards" support only
application-specific and proprietary use cases and contain mathematically
incorrect code.
There are currently different distributions in circulation containing the
name "libjpeg" which is misleading because they don't have the features and
are incompatible with formats supported by actual IJG libjpeg distributions.
One of those fakes is released by members of the ISO committee and just uses
the name of libjpeg for misdirection of people, similar to the abuse of the
name JPEG as described above, while having nothing in common with actual IJG
libjpeg distributions and containing mathematically incorrect code.
The other one claims to be a "derivative" or "fork" of the original libjpeg,
but violates the license conditions as described under LEGAL ISSUES above
and violates basic C programming properties.
We have no sympathy for the release of misleading, incorrect and illegal
distributions derived from obsolete code bases.
Don't use an obsolete code base!
According to the UCC (Uniform Commercial Code) law, IJG has the lawful and
legal right to foreclose on certain standardization bodies and other
institutions or corporations that knowingly perform substantial and
systematic deceptive acts and practices, fraud, theft, and damaging of the
value of the people of this planet without their knowing, willing and
intentional consent.
The titles, ownership, and rights of these institutions and all their assets
are now duly secured and held in trust for the free people of this planet.
People of the planet, on every country, may have a financial interest in
the assets of these former principals, agents, and beneficiaries of the
foreclosed institutions and corporations.
IJG asserts what is: that each man, woman, and child has unalienable value
and rights granted and deposited in them by the Creator and not any one of
the people is subordinate to any artificial principality, corporate fiction
or the special interest of another without their appropriate knowing,
willing and intentional consent made by contract or accommodation agreement.
IJG expresses that which already was.
The people have already determined and demanded that public administration
entities, national governments, and their supporting judicial systems must
be fully transparent, accountable, and liable.
IJG has secured the value for all concerned free people of the planet.
A partial list of foreclosed institutions and corporations ("Hall of Shame")
is currently prepared and will be published later.
TO DO
=====
Version 9 is the second release of a new generation JPEG standard
to overcome the limitations of the original JPEG specification,
and is the first true source reference JPEG codec.
More features are being prepared for coming releases...
Please send bug reports, offers of help, etc. to jpeg-info@jpegclub.org.

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/* jconfig.vc --- jconfig.h for Microsoft Visual C++ on Windows 9x or NT. */
/* This file also works for Borland C++ 32-bit (bcc32) on Windows 9x or NT. */
/* see jconfig.txt for explanations */
#define HAVE_PROTOTYPES
#define HAVE_UNSIGNED_CHAR
#define HAVE_UNSIGNED_SHORT
/* #define void char */
/* #define const */
#undef CHAR_IS_UNSIGNED
#define HAVE_STDDEF_H
#define HAVE_STDLIB_H
#undef NEED_BSD_STRINGS
#undef NEED_SYS_TYPES_H
#undef NEED_FAR_POINTERS /* we presume a 32-bit flat memory model */
#undef NEED_SHORT_EXTERNAL_NAMES
#undef INCOMPLETE_TYPES_BROKEN
/* Define "boolean" as unsigned char, not enum, per Windows custom */
#ifndef __RPCNDR_H__ /* don't conflict if rpcndr.h already read */
typedef unsigned char boolean;
#endif
#ifndef FALSE /* in case these macros already exist */
#define FALSE 0 /* values of boolean */
#endif
#ifndef TRUE
#define TRUE 1
#endif
#define HAVE_BOOLEAN /* prevent jmorecfg.h from redefining it */
#ifdef JPEG_INTERNALS
#undef RIGHT_SHIFT_IS_UNSIGNED
#endif /* JPEG_INTERNALS */
#ifdef JPEG_CJPEG_DJPEG
#define BMP_SUPPORTED /* BMP image file format */
#define GIF_SUPPORTED /* GIF image file format */
#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */
#undef RLE_SUPPORTED /* Utah RLE image file format */
#define TARGA_SUPPORTED /* Targa image file format */
#define TWO_FILE_COMMANDLINE /* optional */
#define USE_SETMODE /* Microsoft has setmode() */
#undef NEED_SIGNAL_CATCHER
#undef DONT_USE_B_MODE
#undef PROGRESS_REPORT /* optional */
#endif /* JPEG_CJPEG_DJPEG */

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/*
* jmorecfg.h
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 1997-2013 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains additional configuration options that customize the
* JPEG software for special applications or support machine-dependent
* optimizations. Most users will not need to touch this file.
*/
/*
* Define BITS_IN_JSAMPLE as either
* 8 for 8-bit sample values (the usual setting)
* 9 for 9-bit sample values
* 10 for 10-bit sample values
* 11 for 11-bit sample values
* 12 for 12-bit sample values
* Only 8, 9, 10, 11, and 12 bits sample data precision are supported for
* full-feature DCT processing. Further depths up to 16-bit may be added
* later for the lossless modes of operation.
* Run-time selection and conversion of data precision will be added later
* and are currently not supported, sorry.
* Exception: The transcoding part (jpegtran) supports all settings in a
* single instance, since it operates on the level of DCT coefficients and
* not sample values. The DCT coefficients are of the same type (16 bits)
* in all cases (see below).
*/
#define BITS_IN_JSAMPLE 8 /* use 8, 9, 10, 11, or 12 */
/*
* Maximum number of components (color channels) allowed in JPEG image.
* To meet the letter of the JPEG spec, set this to 255. However, darn
* few applications need more than 4 channels (maybe 5 for CMYK + alpha
* mask). We recommend 10 as a reasonable compromise; use 4 if you are
* really short on memory. (Each allowed component costs a hundred or so
* bytes of storage, whether actually used in an image or not.)
*/
#define MAX_COMPONENTS 10 /* maximum number of image components */
/*
* Basic data types.
* You may need to change these if you have a machine with unusual data
* type sizes; for example, "char" not 8 bits, "short" not 16 bits,
* or "long" not 32 bits. We don't care whether "int" is 16 or 32 bits,
* but it had better be at least 16.
*/
/* Representation of a single sample (pixel element value).
* We frequently allocate large arrays of these, so it's important to keep
* them small. But if you have memory to burn and access to char or short
* arrays is very slow on your hardware, you might want to change these.
*/
#if BITS_IN_JSAMPLE == 8
/* JSAMPLE should be the smallest type that will hold the values 0..255.
* You can use a signed char by having GETJSAMPLE mask it with 0xFF.
*/
#ifdef HAVE_UNSIGNED_CHAR
typedef unsigned char JSAMPLE;
#define GETJSAMPLE(value) ((int) (value))
#else /* not HAVE_UNSIGNED_CHAR */
typedef char JSAMPLE;
#ifdef CHAR_IS_UNSIGNED
#define GETJSAMPLE(value) ((int) (value))
#else
#define GETJSAMPLE(value) ((int) (value) & 0xFF)
#endif /* CHAR_IS_UNSIGNED */
#endif /* HAVE_UNSIGNED_CHAR */
#define MAXJSAMPLE 255
#define CENTERJSAMPLE 128
#endif /* BITS_IN_JSAMPLE == 8 */
#if BITS_IN_JSAMPLE == 9
/* JSAMPLE should be the smallest type that will hold the values 0..511.
* On nearly all machines "short" will do nicely.
*/
typedef short JSAMPLE;
#define GETJSAMPLE(value) ((int) (value))
#define MAXJSAMPLE 511
#define CENTERJSAMPLE 256
#endif /* BITS_IN_JSAMPLE == 9 */
#if BITS_IN_JSAMPLE == 10
/* JSAMPLE should be the smallest type that will hold the values 0..1023.
* On nearly all machines "short" will do nicely.
*/
typedef short JSAMPLE;
#define GETJSAMPLE(value) ((int) (value))
#define MAXJSAMPLE 1023
#define CENTERJSAMPLE 512
#endif /* BITS_IN_JSAMPLE == 10 */
#if BITS_IN_JSAMPLE == 11
/* JSAMPLE should be the smallest type that will hold the values 0..2047.
* On nearly all machines "short" will do nicely.
*/
typedef short JSAMPLE;
#define GETJSAMPLE(value) ((int) (value))
#define MAXJSAMPLE 2047
#define CENTERJSAMPLE 1024
#endif /* BITS_IN_JSAMPLE == 11 */
#if BITS_IN_JSAMPLE == 12
/* JSAMPLE should be the smallest type that will hold the values 0..4095.
* On nearly all machines "short" will do nicely.
*/
typedef short JSAMPLE;
#define GETJSAMPLE(value) ((int) (value))
#define MAXJSAMPLE 4095
#define CENTERJSAMPLE 2048
#endif /* BITS_IN_JSAMPLE == 12 */
/* Representation of a DCT frequency coefficient.
* This should be a signed value of at least 16 bits; "short" is usually OK.
* Again, we allocate large arrays of these, but you can change to int
* if you have memory to burn and "short" is really slow.
*/
typedef short JCOEF;
/* Compressed datastreams are represented as arrays of JOCTET.
* These must be EXACTLY 8 bits wide, at least once they are written to
* external storage. Note that when using the stdio data source/destination
* managers, this is also the data type passed to fread/fwrite.
*/
#ifdef HAVE_UNSIGNED_CHAR
typedef unsigned char JOCTET;
#define GETJOCTET(value) (value)
#else /* not HAVE_UNSIGNED_CHAR */
typedef char JOCTET;
#ifdef CHAR_IS_UNSIGNED
#define GETJOCTET(value) (value)
#else
#define GETJOCTET(value) ((value) & 0xFF)
#endif /* CHAR_IS_UNSIGNED */
#endif /* HAVE_UNSIGNED_CHAR */
/* These typedefs are used for various table entries and so forth.
* They must be at least as wide as specified; but making them too big
* won't cost a huge amount of memory, so we don't provide special
* extraction code like we did for JSAMPLE. (In other words, these
* typedefs live at a different point on the speed/space tradeoff curve.)
*/
/* UINT8 must hold at least the values 0..255. */
#ifdef HAVE_UNSIGNED_CHAR
typedef unsigned char UINT8;
#else /* not HAVE_UNSIGNED_CHAR */
#ifdef CHAR_IS_UNSIGNED
typedef char UINT8;
#else /* not CHAR_IS_UNSIGNED */
typedef short UINT8;
#endif /* CHAR_IS_UNSIGNED */
#endif /* HAVE_UNSIGNED_CHAR */
/* UINT16 must hold at least the values 0..65535. */
#ifdef HAVE_UNSIGNED_SHORT
typedef unsigned short UINT16;
#else /* not HAVE_UNSIGNED_SHORT */
typedef unsigned int UINT16;
#endif /* HAVE_UNSIGNED_SHORT */
/* INT16 must hold at least the values -32768..32767. */
#ifndef XMD_H /* X11/xmd.h correctly defines INT16 */
typedef short INT16;
#endif
/* INT32 must hold at least signed 32-bit values. */
#ifndef XMD_H /* X11/xmd.h correctly defines INT32 */
#ifndef _BASETSD_H_ /* Microsoft defines it in basetsd.h */
#ifndef _BASETSD_H /* MinGW is slightly different */
#ifndef QGLOBAL_H /* Qt defines it in qglobal.h */
typedef long INT32;
#endif
#endif
#endif
#endif
/* Datatype used for image dimensions. The JPEG standard only supports
* images up to 64K*64K due to 16-bit fields in SOF markers. Therefore
* "unsigned int" is sufficient on all machines. However, if you need to
* handle larger images and you don't mind deviating from the spec, you
* can change this datatype.
*/
typedef unsigned int JDIMENSION;
#define JPEG_MAX_DIMENSION 65500L /* a tad under 64K to prevent overflows */
/* These macros are used in all function definitions and extern declarations.
* You could modify them if you need to change function linkage conventions;
* in particular, you'll need to do that to make the library a Windows DLL.
* Another application is to make all functions global for use with debuggers
* or code profilers that require it.
*/
/* a function called through method pointers: */
#define METHODDEF(type) static type
/* a function used only in its module: */
#define LOCAL(type) static type
/* a function referenced thru EXTERNs: */
#define GLOBAL(type) type
/* a reference to a GLOBAL function: */
#define EXTERN(type) extern type
/* This macro is used to declare a "method", that is, a function pointer.
* We want to supply prototype parameters if the compiler can cope.
* Note that the arglist parameter must be parenthesized!
* Again, you can customize this if you need special linkage keywords.
*/
#ifdef HAVE_PROTOTYPES
#define JMETHOD(type,methodname,arglist) type (*methodname) arglist
#else
#define JMETHOD(type,methodname,arglist) type (*methodname) ()
#endif
/* The noreturn type identifier is used to declare functions
* which cannot return.
* Compilers can thus create more optimized code and perform
* better checks for warnings and errors.
* Static analyzer tools can make improved inferences about
* execution paths and are prevented from giving false alerts.
*
* Unfortunately, the proposed specifications of corresponding
* extensions in the Dec 2011 ISO C standard revision (C11),
* GCC, MSVC, etc. are not viable.
* Thus we introduce a user defined type to declare noreturn
* functions at least for clarity. A proper compiler would
* have a suitable noreturn type to match in place of void.
*/
#ifndef HAVE_NORETURN_T
typedef void noreturn_t;
#endif
/* Here is the pseudo-keyword for declaring pointers that must be "far"
* on 80x86 machines. Most of the specialized coding for 80x86 is handled
* by just saying "FAR *" where such a pointer is needed. In a few places
* explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
*/
#ifndef FAR
#ifdef NEED_FAR_POINTERS
#define FAR far
#else
#define FAR
#endif
#endif
/*
* On a few systems, type boolean and/or its values FALSE, TRUE may appear
* in standard header files. Or you may have conflicts with application-
* specific header files that you want to include together with these files.
* Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
*/
#ifndef HAVE_BOOLEAN
#if defined FALSE || defined TRUE || defined QGLOBAL_H
/* Qt3 defines FALSE and TRUE as "const" variables in qglobal.h */
typedef int boolean;
#ifndef FALSE /* in case these macros already exist */
#define FALSE 0 /* values of boolean */
#endif
#ifndef TRUE
#define TRUE 1
#endif
#else
typedef enum { FALSE = 0, TRUE = 1 } boolean;
#endif
#endif
/*
* The remaining options affect code selection within the JPEG library,
* but they don't need to be visible to most applications using the library.
* To minimize application namespace pollution, the symbols won't be
* defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
*/
#ifdef JPEG_INTERNALS
#define JPEG_INTERNAL_OPTIONS
#endif
#ifdef JPEG_INTERNAL_OPTIONS
/*
* These defines indicate whether to include various optional functions.
* Undefining some of these symbols will produce a smaller but less capable
* library. Note that you can leave certain source files out of the
* compilation/linking process if you've #undef'd the corresponding symbols.
* (You may HAVE to do that if your compiler doesn't like null source files.)
*/
/* Capability options common to encoder and decoder: */
#define DCT_ISLOW_SUPPORTED /* slow but accurate integer algorithm */
#define DCT_IFAST_SUPPORTED /* faster, less accurate integer method */
#define DCT_FLOAT_SUPPORTED /* floating-point: accurate, fast on fast HW */
/* Encoder capability options: */
#define C_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
#define C_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
#define DCT_SCALING_SUPPORTED /* Input rescaling via DCT? (Requires DCT_ISLOW)*/
#define ENTROPY_OPT_SUPPORTED /* Optimization of entropy coding parms? */
/* Note: if you selected more than 8-bit data precision, it is dangerous to
* turn off ENTROPY_OPT_SUPPORTED. The standard Huffman tables are only
* good for 8-bit precision, so arithmetic coding is recommended for higher
* precision. The Huffman encoder normally uses entropy optimization to
* compute usable tables for higher precision. Otherwise, you'll have to
* supply different default Huffman tables.
* The exact same statements apply for progressive JPEG: the default tables
* don't work for progressive mode. (This may get fixed, however.)
*/
#define INPUT_SMOOTHING_SUPPORTED /* Input image smoothing option? */
/* Decoder capability options: */
#define D_ARITH_CODING_SUPPORTED /* Arithmetic coding back end? */
#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
#define D_PROGRESSIVE_SUPPORTED /* Progressive JPEG? (Requires MULTISCAN)*/
#define IDCT_SCALING_SUPPORTED /* Output rescaling via IDCT? (Requires DCT_ISLOW)*/
#define SAVE_MARKERS_SUPPORTED /* jpeg_save_markers() needed? */
#define BLOCK_SMOOTHING_SUPPORTED /* Block smoothing? (Progressive only) */
#undef UPSAMPLE_SCALING_SUPPORTED /* Output rescaling at upsample stage? */
#define UPSAMPLE_MERGING_SUPPORTED /* Fast path for sloppy upsampling? */
#define QUANT_1PASS_SUPPORTED /* 1-pass color quantization? */
#define QUANT_2PASS_SUPPORTED /* 2-pass color quantization? */
/* more capability options later, no doubt */
/*
* Ordering of RGB data in scanlines passed to or from the application.
* If your application wants to deal with data in the order B,G,R, just
* change these macros. You can also deal with formats such as R,G,B,X
* (one extra byte per pixel) by changing RGB_PIXELSIZE. Note that changing
* the offsets will also change the order in which colormap data is organized.
* RESTRICTIONS:
* 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
* 2. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
* is not 3 (they don't understand about dummy color components!). So you
* can't use color quantization if you change that value.
*/
#define RGB_RED 0 /* Offset of Red in an RGB scanline element */
#define RGB_GREEN 1 /* Offset of Green */
#define RGB_BLUE 2 /* Offset of Blue */
#define RGB_PIXELSIZE 3 /* JSAMPLEs per RGB scanline element */
/* Definitions for speed-related optimizations. */
/* If your compiler supports inline functions, define INLINE
* as the inline keyword; otherwise define it as empty.
*/
#ifndef INLINE
#ifdef __GNUC__ /* for instance, GNU C knows about inline */
#define INLINE __inline__
#endif
#ifndef INLINE
#define INLINE /* default is to define it as empty */
#endif
#endif
/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
* two 16-bit shorts is faster than multiplying two ints. Define MULTIPLIER
* as short on such a machine. MULTIPLIER must be at least 16 bits wide.
*/
#ifndef MULTIPLIER
#define MULTIPLIER int /* type for fastest integer multiply */
#endif
/* FAST_FLOAT should be either float or double, whichever is done faster
* by your compiler. (Note that this type is only used in the floating point
* DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
* Typically, float is faster in ANSI C compilers, while double is faster in
* pre-ANSI compilers (because they insist on converting to double anyway).
* The code below therefore chooses float if we have ANSI-style prototypes.
*/
#ifndef FAST_FLOAT
#ifdef HAVE_PROTOTYPES
#define FAST_FLOAT float
#else
#define FAST_FLOAT double
#endif
#endif
#endif /* JPEG_INTERNAL_OPTIONS */

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