2018-04-29  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* version.sh: Updates to prepare for the 1.3.29 release.

	* coders/pict.c (DecodeImage): Assure that scanline is initialized
	to avoid use of uninitialized data.  Fixes oss-fuzz 8063
	"graphicsmagick/coder_WPG_fuzzer: Use-of-uninitialized-value in
	ReadPICTImage". (Credit to OSS-Fuzz)

	* coders/dpx.c (ReadDPXImage): Assure that NULL pixels is not
	used.  Fixes oss-fuzz 8078 "graphicsmagick/coder_DPX_fuzzer:
	Null-dereference WRITE in ReadDPXImage". (Credit to OSS-Fuzz)

	* NEWS.txt: Update NEWS file with information about changes since
	last release.

2018-04-28  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dib.c (ReadDIBImage): Disable EOF tests for "ICODIB"
	subformat due to icon file provided by SourceForge issue #557
	"ErrorCorruptImage: Magick: Unexpected end-of-file ()" where an
	EOF error was reported due to no mask data being supplied.

	* coders/png.c (ReadOneJNGImage): The embedded JPEG image is
	required to have the same dimensions as the JNG image as provided
	by JHDR.  Fixes SourceForge bug 555 "heap-buffer-overflow in
	AcquireCacheNexus when processing jng file".  It is likely that
	this issue is precipitated by using 'montage' which seems to set a
	default non-zero image size.
	(ReadMNGImage): By default limit the maximum loops specifiable by
	the MNG LOOP chunk to 512 loops, but allow this to be modified by
	'-define mng:maximum-loops=value'.  Also assure that the value is
	in the range of 0-2147483647 as per the MNG specification.  This
	is to address the denial of service issue described by
	CVE-2018-10177.  This problem was reported to us by Petr Gajdos
	via email on Fri, 20 Apr 2018.

	* coders/dpx.c (ReadDPXImage): Move misplaced channel validation
	code.  Fixes oss-fuzz 8041 "graphicsmagick/coder_DPX_fuzzer:
	Use-of-uninitialized-value in WriteDPXImage" and oss-fuzz 8055
	"graphicsmagick/enhance_fuzzer: Use-of-uninitialized-value in
	EnhanceImage". (Credit to OSS-Fuzz)

2018-04-27  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/xpm.c (StringToListMod): Algorithm fixes to fix use of
	uninitialized data.  Fixes oss-fuzz 8046
	"graphicsmagick/coder_XPM_fuzzer: Use-of-uninitialized-value in
	StringToListMod". (Credit to OSS-Fuzz)

2018-04-26  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/xpm.c (ReadXPMImage): Reduce memory consumption further.
	Hopefully fixes oss-fuzz 8013 "graphicsmagick/coder_XPM_fuzzer:
	Out-of-memory in graphicsmagick_coder_XPM_fuzzer". (Credit to
	OSS-Fuzz)

	* magick/utility.c (StringToList): Only allocate the memory
	required when converting string to an ASCII list.  May or may not
	fix oss-fuzz 8013 "graphicsmagick/coder_XPM_fuzzer: Out-of-memory
	in graphicsmagick_coder_XPM_fuzzer". (Credit to OSS-Fuzz)

2018-04-24  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/bmp.c (ReadBMPImage): Fix benign use of uninitialized
	data when testing header magick.  Fixes oss-fuzz 7980
	"graphicsmagick/coder_BMP_fuzzer: Use-of-uninitialized-value in
	LocaleNCompare". (Credit to OSS-Fuzz)

	* coders/dpx.c (ReadDPXImage): ColorDifferenceCbCr does require
	even image width. Fixes oss-fuzz 7966
	"graphicsmagick/coder_DPX_fuzzer: Unknown signal in
	TentUpsampleChroma". (Credit to OSS-Fuzz)

2018-04-23  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadDPXImage): ColorDifferenceCbCr element
	requires two samples/pixel, not one. Fixes oss-fuzz 7951
	"graphicsmagick/coder_DPX_fuzzer: Heap-buffer-overflow in
	ReadDPXImage". (Credit to OSS-Fuzz)

2018-04-22  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pdb.c (ReadPDBImage): Assure that pixels buffer is
	initialized.  Fixes oss-fuzz 7937
	"graphicsmagick/coder_PDB_fuzzer: Use-of-uninitialized-value in
	ReadPDBImage". (Credit to OSS-Fuzz)

	* coders/mvg.c (ReadMVGImage): Assure that MVG viewbox parameters
	were supplied.  Fixes oss-fuzz 7936
	"graphicsmagick/coder_MVG_fuzzer: Use-of-uninitialized-value in
	ReadMVGImage". (Credit to OSS-Fuzz)

	* coders/dpx.c (ReadDPXImage): Element descriptors CbYCrY422 and
	CbYACrYA4224 require that the image width be evenly divisible by 2
	so enforce that.  Fixes oss-fuzz 7935
	"graphicsmagick/coder_DPX_fuzzer: Heap-buffer-overflow in
	ReadDPXImage". (Credit to OSS-Fuzz)

2018-04-21  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadDPXImage): Reject DPX files which claim to use
	signed data.  Fixes oss-fuzz 7758
	"graphicsmagick/coder_DPX_fuzzer: Use-of-uninitialized-value in
	WriteDPXImage". (Credit to OSS-Fuzz)
	(ReadDPXImage): Validate that the image elements do update all of
	the channels, including the alpha channel.  Now report an error if
	a color channel is missing.  Fixes oss-fuzz 7758
	"graphicsmagick/coder_DPX_fuzzer: Use-of-uninitialized-value in
	WriteDPXImage".

	* coders/gif.c (DecodeImage): Finally fix oss-fuzz 7732
	"graphicsmagick/coder_GIF_fuzzer: Heap-buffer-overflow in
	DecodeImage" which was not actually fixed with previous
	changes. (Credit to OSS-Fuzz)

2018-04-21  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/topol.c Emit error when tile storage overflows image data;
        fixes oss-fuzz 7769 thanks to oss-fuzz.

2018-04-20  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (ConvertPrimitiveToPath):  Fixed a bug
	in which SVG paths containing multiple open subpaths were
	not being processed correctly, resulting in incorrect
	output.  This fixes ticket #94.

2018-04-18  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/gif.c (DecodeImage): Fix use of uninitialized memory
	during error condition in decoder. Fixes oss-fuzz 7732
	"graphicsmagick/coder_GIF_fuzzer: Heap-buffer-overflow in
	DecodeImage". (Credit to OSS-Fuzz)

	* coders/txt.c (ReadTXTImage): Assure that all image pixels are
	initialized to black.

	* Magick++/demo/zoom.cpp (main): Add a -read-blob option to read
	input file into a Blob so that it is read by the Blob reader
	rather than the file reader.  Default the output Geometry to the
	input image geometry in case the user does not specify a resize
	resolution or geometry.

	* Magick++/tests/readWriteBlob.cpp (main): Improve the quality of
	code which reads a file into memory for Blob testing.

	* magick/blob.c (BlobToImage): Add exception reports for the cases
	where 'magick' was not set and the file format could not be
	deduced from its header.  Previously a null Image pointer was
	being returned without any exception being thrown.

2018-04-15  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadDPXImage): Assure that CbCr layer initializes
	all channels if it is the first element of a planar DPX.  Fixes
	oss-fuzz 7703 "graphicsmagick/coder_DPX_fuzzer:
	Use-of-uninitialized-value in WriteDPXImage". (Credit to OSS-Fuzz)

	* coders/pict.c (ReadPICTImage): Don't refer to filename member of
	ImageInfo which was just destroyed. Much thanks to Alex Gaynor for
	finding this.  Should fix oss-fuzz 6867
	"graphicsmagick/coder_PCT_fuzzer: Heap-use-after-free in
	GetLocaleExceptionMessage". (Credit to OSS-Fuzz).

2018-04-14  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/sgi.c (ReadSGIImage): Assure that iris pixels are fully
	initialized.  Fixes oss-fuzz 7543
	"graphicsmagick/coder_SGI_fuzzer: Use-of-uninitialized-value in
	SGIEncode". (Credit to OSS-Fuzz).

	* coders/xcf.c (ReadXCFImage): Restore SetImage() which was
	previously commented out.  This is needed to assure initialized
	pixels.  Fixes oss-fuzz 7430 "graphicsmagick/coder_XCF_fuzzer:
	Use-of-uninitialized-value in AlphaCompositePixel". (Credit to
	OSS-Fuzz).

	* coders/pict.c (ReadPICTImage): Properly initialize "black
	canvas" that tiles may be composed on.  Fixes oss-fuzz 7574
	"graphicsmagick/enhance_fuzzer: Use-of-uninitialized-value in
	EnhanceImage". (Credit to OSS-Fuzz).

	* coders/rle.c (ReadRLEImage): Check for EOF when reading comment.
	Fixes oss-fuzz 7667 "graphicsmagick/coder_RLE_fuzzer:
	Use-of-uninitialized-value in ReadRLEImage". (Credit to OSS-Fuzz).

	* coders/pdb.c (WritePDBImage): Avoid use of uninitialized
	bytes. Fixes oss-fuzz 7638 "graphicsmagick/coder_PDB_fuzzer:
	Use-of-uninitialized-value in WritePDBImage". (Credit to
	OSS-Fuzz).

	* coders/rla.c (ReadRLAImage): Add many more validations,
	including scanline offsets and number of channels.  Fixes oss-fuzz
	7653 "graphicsmagick/coder_RLA_fuzzer: Timeout in
	graphicsmagick_coder_RLA_fuzzer". (Credit to OSS-Fuzz).

	* coders/txt.c (ReadTXTImage): Implement missing subrange logic to
	read only the specified range of frames.  Limits frames read from
	oss-fuzz test case
	clusterfuzz-testcase-minimized-coder_TEXT_fuzzer-6061076048248832
	"graphicsmagick/coder_TEXT_fuzzer: Timeout in
	graphicsmagick_coder_TEXT_fuzzer". (Credit to OSS-Fuzz).

	* Magick++/lib/Image.cpp (read): Set subrange = 1 since this
	interface is intended to read just one frame from the input file.
	Use the STL-based interfaces to read multiple frames.

	* coders/fits.c (ReadFITSImage): Verify FITS header before reading
	further.  Rejects file from oss-fuzz 7650
	"graphicsmagick/coder_FITS_fuzzer: Out-of-memory in
	graphicsmagick_coder_FITS_fuzzer".  (Credit to OSS-Fuzz).

	* PerlMagick/Magick.xs (Get): Fix PerlMagick compilation problem
	due to rename/repurposing of image->clip_mask.

2018-04-13  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/image.c, magick/image.h:  In order to be able to
	support SVG masks, and to be able to further extend the
	Image data structure without changing its size, new data
	structure ImageExtra (struct _ImageExtra) has been added.
	Header file image.h contains only a forward declaration;
	the members of ImageExtra are defined in file image.c.
	Image member variable Image * clip_mask has been replaced
	by ImageExtra * extra, and function prototypes that enable
	access to ImageExtra have been added to image.h.  The
	clip_mask member variable now resides in ImageExtra.  All
	references to Image::clip_mask in the GraphicsMagick
	source code have either been replaced with direct references
	to ImageExtra::clip_mask (image.c), or have been replaced
	with calls to access function ImageGetClipMask().

	* magick/render.c, magick/render.h:  In order to be able to
	support SVG masks, and to be able to further extend the
	DrawInfo data structure without changing its size, new data
	structure DrawInfoExtra (struct _DrawInfoExtra) has been added.
	Header file render.h contains only a forward declaration;
	the members of DrawInfoExtra are defined in file render.c.
	DrawInfo member variable char * clip_path has been replaced by
	DrawInfoExtra * extra, and function prototypes that enable
	access to DrawInfoExtra have been added to render.h.  The
	clip_path member variable now resides in ImageExtra.  All
	references to DrawInfo::clip_path in the GraphicsMagick
	source code have either been replaced with direct references
	to DrawInfoExtra::clip_path (render.c), or have been
	replaced with calls to access function DrawInfoGetClipPath().

	* magick/image.c (new functions CompositePathImage,
	CompositeMaskImage, GetImageCompositeMask,
	SetImageCompositeMask):  Defined new data structure ImageExtra,
	added create/destroy logic, and implemented associated access
	functions.  Implemented SVG masks.

	* magick/render.c (DrawImage, new function DrawCompositeMask):
	Defined new data structure DrawInfoExtra, added create/destroy
	logic, and implemented associated access functions.  Impemented
	SVG masks.

	* magick/pixel_cache.c (SyncCacheNexus, new function
	CompositeCacheNexus):  Fixed references to Image::clip_mask.
	Implemented SVG masks.

	* coders/svg.c (SVGStartElement, SVGEndElement): Implemented
	SVG masks.

	* locale/c.mgk, magick/gm_messages.mc, magick/local_c.h:
	Added new error codes to support SVG masks.

	* coders/ps3.c, magick/enhance.c: Fixed references to
	Image::clip_mask.

	* magick/draw.c, wand/drawing_wand.c: Fixed references to
	DrawInfo::clip_path.

2018-04-13  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/wpg.c Crash on row overflow fixed oss-fuzz 7639 thanks to oss-fuzz.

2018-04-11  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadDPXImage): Add more header validations.
	Always assure that scanline is initialized for Luma channel. Fixes
	oss-fuzz 7544 "graphicsmagick/coder_DPX_fuzzer:
	Use-of-uninitialized-value in WriteDPXImage". (Credit to OSS-Fuzz)

	* coders/pdb.c (ReadPDBImage): Add more EOF checks to avoid benign
	use of uninitialized data.  Fixes oss-fuzz 7545
	"graphicsmagick/coder_PDB_fuzzer: Use-of-uninitialized-value in
	ReadPDBImage".

	* coders/wpg.c (InsertRow, UnpackWPGRaster): x & y should be
	'unsigned long' to match type used by pixel cache APIs and image
	rows/columns.

2018-04-08  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/wpg.c Stop reading when last row is reached.
	This should stop oss-fuzz 7528 thanks to oss-fuzz.


2018-04-10  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/xcf.c (ReadXCFImage): Fix use of uninitialized data in
	magick header string for runt file.  Fixes oss-fuzz 7521
	"graphicsmagick/coder_XCF_fuzzer: Use-of-uninitialized-value in
	LocaleNCompare". (Credit to OSS-Fuzz).

2018-04-09  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* OVERVIEW: Change set 9aaeeca0224c modified the drawing
	of clipping paths to conform to the SVG spec.  This change
	set restores the previous behavior for non-SVG clients of
	render.c, while still satisfying the SVG spec for SVG clients.

	* magick/render.h (DrawInfo): Added a bit field in member
	"flags" to indicate that drawing should be SVG compliant.

	* magick/render.c (DrawImage): Now recognizes keyword
	"svg-compliant", and tags DrawInfo accordingly.  This
	allows for existing features in render.c to be changed
	to comply with the SVG spec without impacting the previous
	behavior expected by non-SVG clients.

	* magick/render.c (DrawImage): Now uses DrawInfo "flags"
	bit for SVG compliance in conjunction with "flags" bit
	for "clipping path" to determine when to ignore changes
	to fill color, stroke color, etc.  This restores the
	previous behavior for clipping paths for non-SVG clients.

	* coders/svg.c (SVGStartElement): The initial set of
	MVG commands for rendering an SVG file now includes
	new keyword "svg-compliant" (to indicate that certain
	graphical elements should be drawn according to the
	SVG spec), and includes an intialization of the SVG
	"fill-rule" to "nonzero" (the SVG default) instead of
	the internally initialized value of "evenodd".

	* coders/wpg.c: Fixed C99 "//" comments.

2018-04-08  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pict.c (ReadPICTImage): Copy tile exception info to main
	image and don't composite tile if it has a problem.  Fixes
	oss-fuzz 7169 "graphicsmagick/enhance_fuzzer:
	Use-of-uninitialized-value in EnhanceImage". (Credit to OSS-Fuzz)

	* coders/dib.c (ReadDIBImage): Do not increase decode bits/pixel
	if compression=2, but use it to increase pixel packet size when
	estimating bytes per line for decode buffer.  Fixes oss-fuzz issue
	7324 "graphicsmagick/coder_WPG_fuzzer: Use-of-uninitialized-value
	in ReadDIBImage". (Credit to OSS-Fuzz)

	* coders/dpx.c (ReadDPXImage): When handling the first element of
	a planar DPX, assure that the other channels are
	initialized. Fixes oss-fuzz 7841 "graphicsmagick/coder_DPX_fuzzer:
	Use-of-uninitialized-value in WriteDPXImage". (Credit to OSS-Fuzz)

	* coders/tim.c (ReadTIMImage): Only 4 and 8 bit TIM requires a
	colormap. For other depths, force reading as DirectClass even if
	the TIM file provides a colormap.  Fixes oss-fuzz 7407
	"graphicsmagick/coder_TIM_fuzzer: Use-of-uninitialized-value in
	SyncImageCallBack". (Credit to OSS-Fuzz)

2018-04-08  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/mat.c The unread data contains crap in memory,
	erase current image data. This should mute oss-fuzz 6604.

	* coders/wpg.c - condition "if(y<1) continue;" is redundant
	and could be removed completely.
	Allow logging in MatlabV4 module.

	* coders/svg.c - Do not use C++ syntax in C code - removed.

2018-04-07  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/wpg.c (UnpackWPGRaster): Fix uninitialized row 0 when
	row-based RLE is used.  Fixes oss-fuzz 6603
	"graphicsmagick/enhance_fuzzer: Use-of-uninitialized-value in
	BlendCompositePixel". (Credit to OSS-Fuzz)

	* coders/pcd.c: Fix many issues, including oss-fuzz 6016
	"graphicsmagick/coder_PCD_fuzzer: Heap-double-free in
	MagickRealloc" and oss-fuzz 6108 "graphicsmagick/coder_PCD_fuzzer:
	Unknown signal in AllocateThreadViewDataSet". (Credit to OSS-Fuzz)

2018-04-06  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dcm.c (funcDCM_BitsStored): Limit DICOM significant bits
	to 16.  Otherwise rescale map code blows up.  Fixes oss-fuzz 7435
	"graphicsmagick/coder_DCM_fuzzer: Out-of-memory in
	graphicsmagick_coder_DCM_fuzzer". (Credit to OSS-Fuzz)

	* coders/pix.c (ReadPIXImage): Detect EOF.  Reject RLE lenth of
	zero.  Fixes oss-fuzz 7440 "graphicsmagick/coder_PIX_fuzzer:
	Out-of-memory in graphicsmagick_coder_PIX_fuzzer". (Credit to
	OSS-Fuzz)

2018-04-05  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadDPXImage): Insist on having an element
	descriptor we understand since otherwise we can not decode the
	image.  Fixes oss-fuzz 7410 "graphicsmagick/coder_DPX_fuzzer:
	Use-of-uninitialized-value in WriteDPXImage". (Credit to OSS-Fuzz)

	* coders/avs.c, etc... (WriteAVSImage): Cache image list length
	before writing image sequence so that progress monitor is
	scalable.  Helps with oss-fuzz 7404
	"graphicsmagick/coder_AVS_fuzzer: Timeout in
	graphicsmagick_coder_AVS_fuzzer". (Credit to OSS-Fuzz)

2018-04-05  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement, SVGEndElement),
	magick/render.c (DrawImage): The current text position
	is now maintained by DrawImage() instead of by
	SVGStartElement() and SVGEndElement().  This change was
	made to support the recently implmemented "use" and
	"class" elements, which may make changes to the font
	size that are not visible to the code in svg.c.

	* coders/svg.c (GetStyleTokens, SVGStartElement): The
	list of SVG attributes is now reordered so that
	"font-size", "class", and "style" are processed first.
	This ensures that a change to the font size will be
	processed before any dimensional attribute whose value
	may depend on the font size (e.g., a width value
	specified in "em" units).

	* coders/svg.c (ProcessStyleClassDefs): Fixed two memory
	leaks associated with making an early return when
	malformed input is detected.

	* magick/render.c (ExtractTokensBetweenPushPop): Fixed
	an uninitialized variable condition which can occur when
	malformed input is detected.

	* magick/render.h (DrawInfo), magick/render.c: DrawInfo
	member "unused1" has been renamed "flags".  It is now
	used to tag a DrawInfo as being a clipping path or a
	compositing mask.

2018-04-04  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pdb.c (ReadPDBImage): Update DirectClass pixels to avoid
	use of uninitialized memory for 2 bits/pixel.  Fixes oss-fuzz 7350
	"graphicsmagick/coder_PDB_fuzzer: Use-of-uninitialized-value in
	WritePDBImage".  (Credit to OSS-Fuzz)

	* coders/palm.c (ReadPALMImage): Fix use of uninitialized memory.
	Fixes oss-fuzz 7325 "graphicsmagick/coder_PALM_fuzzer:
	Use-of-uninitialized-value in TransparentImageCallBack". (Credit
	to OSS-Fuzz)

	* coders/dcm.c (DCM_ReadNonNativeImages): Break out of reading
	loop on EOF and properly report exception.  Fixes oss-fuzz 7349
	"graphicsmagick/coder_DCM_fuzzer: Timeout in
	graphicsmagick_coder_DCM_fuzzer". (Credit to OSS-Fuzz)

2018-04-03  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/xcf.c (ReadXCFImage): Require that XCF file offsets be in
	ascending order to avoid DOS.  Fixes oss-fuzz 7333
	"graphicsmagick/coder_XCF_fuzzer: Out-of-memory in
	graphicsmagick_coder_XCF_fuzzer". (Credit to OSS-Fuzz)

	* coders/wpg.c (UnpackWPGRaster): Fix memory leak in error return
	path. Fixes oss-fuzz 7338 "graphicsmagick/enhance_fuzzer:
	Direct-leak in UnpackWPGRaster". (Credit to OSS-Fuzz)

2018-04-03  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement): This changeset adds
	support for SVG geometric transforms specified using the
	style="transform: ..." syntax.  This syntax is sometimes
	used when exporting SVG files from Adobe Illustrator.

2018-04-02  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadDPXImage): Validate DPX packing method.  Fixes
	oss-fuzz 7296 "graphicsmagick/coder_DPX_fuzzer:
	Use-of-uninitialized-value in WriteDPXImage". (Credit to OSS-Fuzz)

2018-04-02  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement, SVGEndElement),
	magick/render.c (DrawImage): This changeset adds support for
	"class" styling attributes within a <style> section within
	the <defs> section, and the ability to reference them from
	other SVG elements by class="classname".  SVG files exported
	from Adobe Illustrator make extensive use of "class" definitions.

2018-04-01  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pict.c (ReadPICTImage): Fix leak of tile image on EOF.
	This is a recent regression.  Fixes oss-fuzz 7287
	"graphicsmagick/coder_PCT_fuzzer: Indirect-leak in
	CloneImage". (Credit to OSS-Fuzz)

	* magick/pixel_cache.c (OpenCache): Use image->scene rather than
	GetImageIndexInList(image) for scene-id part of cache info file
	name.

	* coders/txt.c (WriteTXTImage): Optimize the progress indicator
	since it is very inefficient with a large number of scenes and
	oss-fuzz 7090 "graphicsmagick/coder_TEXT_fuzzer: Timeout in
	graphicsmagick_coder_TEXT_fuzzer" consistently shows
	GetImageListLength() in its stack traces.

	* coders/dcm.c (ReadDCMImage): DICOM reader was no longer
	immediately quitting with excessive samples per pixel.  This
	caused spinning for a very long time when reading planar images
	with large samples per pixel.  This is a regression due to recent
	changes.  Fixes oss-fuzz 7269 "graphicsmagick/coder_DCM_fuzzer:
	Timeout in graphicsmagick_coder_DCM_fuzzer". (Credit to OSS-Fuzz)

	* coders/xcf.c (ReadXCFImage): Destroy layer info before returning
	due to exception.  This is a new regression due to adding more
	checks. Fixes oss-fuzz 7277 "graphicsmagick/coder_XCF_fuzzer:
	Direct-leak in ReadXCFImage". (Credit to OSS-Fuzz)

	* coders/pdb.c (ReadPDBImage): Assure that all bytes of scanline
	are initialized while decoding.  Fixes oss-fuzz 7051
	"graphicsmagick/coder_PDB_fuzzer: Use-of-uninitialized-value in
	WritePDBImage". (Credit to OSS-Fuzz)

2018-03-31  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pcx.c (ReadPCXImage): Assure that scanline is
	initialized.  Fixes oss-fuzz 6612
	"graphicsmagick/coder_PCX_fuzzer: Use-of-uninitialized-value in
	WriteRLEPixels". (Credit to OSS-Fuzz)

	* coders/wpg.c (ReadWPGImage): Detect unexpected EOF and avoid use
	of uninitialized data.  Fixes oss-fuzz 6601
	"graphicsmagick/enhance_fuzzer: Use-of-uninitialized-value in
	ImportIndexQuantumType". (Credit to OSS-Fuzz)

	* coders/sgi.c (ReadSGIImage): Assure that RLE decode buffer is
	initialized.  Fixes oss-fuzz 6599
	"graphicsmagick/coder_SGI_fuzzer: Use-of-uninitialized-value in
	SyncImageCallBack" and oss-fuzz 6600
	"graphicsmagick/coder_SGI_fuzzer: Use-of-uninitialized-value in
	SGIEncode". (Credit to OSS-Fuzz)

	* coders/viff.c (ReadVIFFImage): Fix blob I/O size validation to
	avoid use of uninitialized data. Fixes oss-fuzz 6597
	"graphicsmagick/coder_VIFF_fuzzer: Use-of-uninitialized-value in
	ThresholdImage". (Credit to OSS-Fuzz)
	(ReadVIFFImage): Don't execute SetImageType(image,BilevelType) on
	an image which has no pixels yet in order to avoid use of
	uninitialized data. Fixes oss-fuzz 6597.  (Credit to OSS-Fuzz)

	* coders/wbmp.c (ReadWBMPImage): Fix blob I/O size validation to
	avoid use of uninitialized data. Fixes oss-fuzz 7047
	"graphicsmagick/coder_WBMP_fuzzer: Use-of-uninitialized-value in
	ReadWBMPImage". (Credit to OSS-Fuzz)

	* coders/wpg.c (ExtractPostscript): Allow non-Postscript content
	but force reading using the magick we already detected.  Also log
	the format that we detected.

	* coders/xcf.c (ReadOneLayer): Reject layer size of 0x0.  Fixes
	oss-fuzz 6636 "graphicsmagick/coder_XCF_fuzzer: Direct-leak in
	MagickMallocAligned". (Credit to OSS-Fuzz)
	(ReadXCFImage): Verify that seek offsets are within the bounds of
	the file data. Fixes oss-fuzz 6682
	"graphicsmagick/coder_XCF_fuzzer: Out-of-memory in
	graphicsmagick_coder_XCF_fuzzer". (Credit to OSS-Fuzz)

	* magick/pixel_cache.c (ModifyCache): Destroy CacheInfo if
	OpenCache() fails so it is not leaked.

	* coders/wpg.c (ExtractPostscript): Enforce that embedded file is
	a Postscript file.  Fixes oss-fuzz 7235
	"graphicsmagick/coder_WPG_fuzzer: Indirect-leak in MagickRealloc".
	This is indicated to be a regression. (Credit to OSS-Fuzz)

2018-03-30  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pict.c (ReadPICTImage): Check image pixel limits before
	allocating memory for tile.  Fixes oss-fuzz 7217
	"graphicsmagick/coder_PICT_fuzzer: Out-of-memory in
	graphicsmagick_coder_PICT_fuzzer".

2018-03-29  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pcd.c (ReadPCDImage): Add checks for EOF. Fixes oss-fuzz
	issue 7180 "graphicsmagick/coder_PCDS_fuzzer: Timeout in
	graphicsmagick_coder_PCDS_fuzzer".  (Credit to OSS-Fuzz)

2018-03-29  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement, SVGEndElement),
	magick/render.c (DrawImage): This changeset implements the SVG
	"use" element.  Graphical elements (e.g., "rect", "text", etc.)
	can be tagged with an identifier using 'id="identifier"' when
	defined within the "defs" section.  They can then be referenced
	elsewhere in the SVG file using:

	<use xlink:href="#identifier" ... />

	When referencing a graphical element by its identifier, the
	following syntaxes are now treated as being the same:

	href="#identifier"
	href="url(#identifier)"
	xlink:href="#identifier"
	xlink:href="url(#identifier)"

2018-03-27  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/tim.c (ReadTIMImage): Reader was not observing subimage
	and subrange to quit after the specified frame range.  Inspired by
	oss-fuzz 7132 "graphicsmagick/coder_TIM_fuzzer: Timeout in
	graphicsmagick_coder_TIM_fuzzer" (Credit to OSS-Fuzz)

2018-03-27  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement): Enable setting the
	background color from the SVG file when the client
	specifies style="background:color" inside the <svg>
	... </svg> element.

2018-03-25  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/mtv.c (ReadMTVImage): Add some elementary tracing to MTV
	reader.

	* coders/png.c (ReadMNGImage): Fix SourceForge issue 554
	"Divide-by-zero in ReadMNGImage (coders/png.c)".  (Credit to Trace
	Probe)

	* coders/bmp.c (ReadBMPImage): Assure that start position always
	advances to avoid looping BMPs.  Fixes oss-fuzz 7045
	"graphicsmagick/coder_BMP_fuzzer: Timeout in
	graphicsmagick_coder_BMP_fuzzer". (Credit to OSS-Fuzz)

	* coders/pict.c (DecodeImage): Verify that sufficient backing data
	exists before allocating memory to read it.  Fixes oss-fuzz 6629
	"graphicsmagick/coder_PCT_fuzzer: Out-of-memory in
	graphicsmagick_coder_PCT_fuzzer".
	(ReadPICTImage): Destroy tile_image in ThrowPICTReaderException()
	macro to simplify logic.

2018-03-25  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/mat.c Check whether datablock is really read.
	Fixes oss-fuzz 7056 (Credit to OSS-Fuzz)

	* coders/txt.c Duplicate image check for data with fixed geometry
	previous check is skipped. Fixes oss-fuzz 7090.

2018-03-24  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dcm.c (ReadDCMImage): Validate that samples per pixel is
	in valid range.  Fixes oss-fuzz 6260
	"graphicsmagick/coder_DCM_fuzzer: Out-of-memory in
	graphicsmagick_coder_DCM_fuzzer". (Credit to OSS-Fuzz)

	* coders/meta.c (format8BIM): Allocate space for null termination
	and null terminate string.  Fixes oss-fuzz 5985
	"graphicsmagick/coder_8BIMTEXT_fuzzer: Heap-buffer-overflow in
	formatIPTCfromBuffer". (Credit to OSS-Fuzz)

	* coders/fits.c (ReadFITSImage): Include number of FITS scenes in
	file size validations.  Fixes oss-fuzz 6781
	"graphicsmagick/coder_FITS_fuzzer: Timeout in
	graphicsmagick_coder_FITS_fuzzer". (Credit to OSS-Fuzz)

2018-03-23  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/meta.c (format8BIM): Validate size request prior to
	allocation. Fixes oss-fuzz issue 5974
	"graphicsmagick/coder_8BIMTEXT_fuzzer: Out-of-memory in
	graphicsmagick_coder_8BIMTEXT_fuzzer". (Credit to OSS-Fuzz)

2018-03-23  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/mat.c Fix forged amount of frames 7076. (Credit to OSS-Fuzz)

        * coders/topol.c Check for forged image that overflows file size
        (fuzz 6836).

2018-03-23  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c, render.h (DrawInfo, CloneDrawInfo,
	DrawClipPath, DrawImage, GetDrawInfo): According to the SVG
	spec, a clipping path is defined only by the geometry of its
	constituent elements, and is not dependent on fill color/opacity,
	stroke color/opacity, or stroke width.  To ensure conformity
	with the spec, when a clipping path is created, these SVG
	elements are set to appropriate values, and any attempt to
	modify them is ignored.

	Also, whenever a clipping path is drawn, the associated image
	attributes are now updated from the parent image structure.
	This ensures that any added or modified attributes are up to
	date.

2018-03-22  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/topol.c Use rather MagickSwabArrayOfUInt32() to
        flip all array elements at once.

        * magick/annotate.c Compilation issue - using C++ syntax in C code.

2018-03-20  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadDPXImage): Validate header length and offset
	properties.  Fixes oss-fuzz "graphicsmagick/coder_DPX_fuzzer:
	Use-of-uninitialized-value in WriteDPXImage". (Credit to OSS-Fuzz)

2018-03-20  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/annotate.c (RenderType): According to the SVG
	spec, the 'font-family' element can be a comma-separated
	list of one or more font family names.  Function RenderType
	in file annotate.c has been modified to support multiple
	font family names as follows.  The comma-separated list is
	processed until the first available font family is found.
	If no font family is found, or if font substitution occurred,
	then the entire font family string is tested to see if it
	exactly matches a font name, or if the font family string
	with blanks changed to hypens exactly matches a font name.
	If a font name match is found, the matched font overrides
	the font substution.  The font name matching functionality
	is beyond what's in the SVG spec and is provided as a
	convenience to the user.

2018-03-20  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/mat.c Fix forged amount of frames 6755. (Credit to OSS-Fuzz)

2018-03-20  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/topol.c Redesign ReadBlobDwordLSB() to be more effective.

2018-03-19  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/xpm.c (ReadXPMImage): Reject XPM if its condensed version
	contains non-whitespace control characters.  Fixes oss-fuzz 7027
	"graphicsmagick/coder_XPM_fuzzer: Timeout in
	graphicsmagick_coder_XPM_fuzzer". (Credit to OSS-Fuzz)

2018-03-19  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/topol.c Fix tile index overflow fuzz 6634. (Credit to OSS-Fuzz)

2018-03-19  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dcm.c (DCM_ReadGrayscaleImage): Don't use rescale map if
	it was not allocated.  This issue was induced in this development
	cycle due to disabling generating the rescale map.  Fixes oss-fuzz
	7021 "graphicsmagick/coder_DCM_fuzzer: Null-dereference READ in
	DCM_ReadGrayscaleImage". (Credit to OSS-Fuzz)

2018-03-18  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/color_lookup.c (QueryColorDatabase): Defend against
	partial scanf() expression matching, resulting in use of
	uninitialized data.  Likely fixes oss-fuzz 6596
	"graphicsmagick/coder_XPM_fuzzer: Use-of-uninitialized-value in
	IsMonochromeImage". (Credit to OSS-Fuzz)

	* coders/rle.c (ReadRLEImage): Validate number of colormap bits to
	avoid undefined shift behavior.  Fixes oss-fuzz 6630
	"graphicsmagick/enhance_fuzzer: Undefined-shift in
	ReadRLEImage". (Credit to OSS-Fuzz)

	* coders/dcm.c (DCM_ReadRGBImage): Don't use rescale map if it was
	not allocated.  This issue was induced in this development cycle
	due to disabling generating the rescale map.  Fixes oss-fuzz 6995
	"graphicsmagick/coder_DCM_fuzzer: Null-dereference READ in
	DCM_ReadRGBImage". (Credit to OSS-Fuzz)

	* coders/dib.c (DecodeImage): Report failure to decode to expected
	amount of pixel data as an error.  Fixes oss-fuzz 7007
	"graphicsmagick/enhance_fuzzer: Use-of-uninitialized-value in
	EnhanceImage". (Credit to OSS-Fuzz)

	* coders/bmp.c (ReadBMPImage): Add file size and offset/seek
	validations.  Fixes oss-fuzz 6623
	"graphicsmagick/coder_BMP_fuzzer: Timeout in
	graphicsmagick_coder_BMP_fuzzer". (Credit to OSS-Fuzz)

2018-03-17  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* dcraw/dcraw.c Updated to version 9.27

2018-03-15  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/gif.c (ReadGIFImage): Fix botched fixes for use of
	uninitialized data when reading GIF extension blocks.  Hopefully
	ok now.

2018-03-13  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/gif.c (ReadGIFImage): Fix use of uninitialized data when
	reading GIF extension blocks.  Fixes oss-fuzz 6609
	"graphicsmagick/coder_GIF_fuzzer: Use-of-uninitialized-value in
	MagickArraySize". This seems to be a totally benign issue. (Credit
	to OSS-Fuzz)

	* magick/magick.c (MagickSignal): Use an alternate signal stack,
	if available.  This is required for Go lang C language extensions
	since Go lang requests an alternate signal sack, and uses small
	stacks for its threads.  If the library user has not allocated an
	alternate signal stack, then behavior should be just as before.
	Issue was originally reported by yzh杨振宏 on March 1, 2018 via
	the graphicsmagick-help SourceForge mailing list.

2018-02-28  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/pixel_cache.c (AcquireCacheNexus): Add a check that the
	pixel cache is compatible with the image dimensions.  Fixes
	oss-fuzz issues 5978 5988 5989 5990 5993 6016, and 6056, which are
	all related to the PICT writer. (Credit to OSS-Fuzz)

	* magick/draw.c (DrawGetStrokeDashArray): Check for failure to
	allocate memory.  Patch submited by Petr Gajdos via email on
	February 28, 2018.

2018-02-27  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/fits.c (ReadFITSImage): Fix signed integer overflow when
	computing pixels size.  Fixes oss-fuzz 6586
	"graphicsmagick/coder_FITS_fuzzer: Integer-overflow in
	ReadFITSImage". (Credit to OSS-Fuzz)

2018-02-27  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement, SVGEndElement): From the
	SVG spec:  "The 'foreignObject' element allows for inclusion
	of a foreign namespace which has its graphical content drawn
	by a different user agent."  Code has been added to consume
	and discard the 'foreignObject' element and any settings (e.g.,
	fill color) internal to it.  Previously, settings internal
	to the 'foreignObject' element would persist and "leak" into
	the graphic elements that followed it, resulting in undesired
	side effects (e.g., fill color other than the expected default).

2018-02-27  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (DrawPolygonPrimitive): Fixed a bug
	introduced by changeset 39102dd1d456.  For SVG, this
	changeset applied both the group AND the fill opacity
	values to fill patterns (similarly for stroke).  For WMF,
	however, this caused the fill pattern to be rendered as
	100% transparent.  A closer reading of the SVG spec does
	NOT show that the fill opacity should be applied to the
	fill pattern, so as of this latest changeset only the group
	opacity value is applied to fill and stroke patterns.

2018-02-27  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/bmp.c (ReadBMPImage): Fix divide by zero regression added
	by latest fixes.  Fixes oss-fuzz 6583
	"graphicsmagick/coder_BMP_fuzzer: Divide-by-zero in ReadBMPImage".
	(Credit to OSS-Fuzz)

2018-02-26  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pict.c (ReadPICTImage): Validate that PICT rectangles do
	not have zero dimensions.  Specify expected file type when reading
	from a temporary file.  Trace PICT rectangle dimensions.  More
	detection of blob EOF and more error handling.  Fixes oss-fuzz
	issue 6193 "graphicsmagick/coder_PCT_fuzzer: Unknown signal in
	AllocateImageColormap" and likely many oss-fuzz ASAN/UBSAN issues
	reported against "PCT" and "PICT" since this one problem appears
	to be causing a spew of reports.

	* coders/png.c (ReadMNGImage): Detect and handle failure to
	allocate global PLTE.  Problem was reported via email from Petr
	Gajdos on February 26, 2018.

2018-02-25  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/blob.c (ReadBlobLSBDouble): Make sure imported double is
	a normal value.
	(ReadBlobLSBDoubles): Make sure imported doubles are normal
	values.
	(ReadBlobLSBFloat): Make sure imported float is a normal value.
	(ReadBlobLSBFloats): Make sure imported floats are normal values.
	(ReadBlobMSBFloat): Make sure imported float is a normal value.
	(ReadBlobMSBFloats): Make sure imported floats are normal values.
	(ReadBlobMSBDouble): Make sure imported double is a normal value.
	(ReadBlobMSBDoubles): Make sure imported doubles are normal
	values.

	* magick/import.c (ImportFloat32Quantum): Make sure imported float
	is a normal value.
	(ImportFloat64Quantum): Make sure imported double is a normal
	value.

	* magick/image.h (RoundDoubleToQuantum): Restore previous behavior
	(from earlier today).
	(RoundFloatToQuantum): Restore previous behavior (from earlier
	today).

	* coders/bmp.c (ReadBMPImage): Fix UBSAN runtime error: left shift
	of 205 by 24 places cannot be represented in type 'int'.

	* coders/ept.c (ReadEPTImage): Fix dereference of NULL pointer
	which was detected by UBSAN in the test suite.

	* magick/image.h (RoundDoubleToQuantum): Check double value for
	NaN and infinity in order to avoid undefined behavior.
	(RoundFloatToQuantum): Check float value for NaN and infinity in
	order to avoid undefined behavior.

	* magick/common.h (MAGICK_ISNAN): Add a isnan() wrapper macro.
	(MAGICK_ISINF): Add a isinf() wrapper macro.

2018-02-25  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/mat.c Fix oss-fuzz issue 6273 - Heap-use-after-free in
	GetLocaleExceptionMessage. (Credit to OSS-Fuzz)

2018-02-24  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dcm.c (DCM_PostRescaleImage): Remove use of
	DCM_PostRescaleImage() since its implementation is wrong and
	accesses non-allocated heap memory.  Problem was reported by Petr
	Gajdos via email on February 8, 2018.

	* coders/jp2.c (ReadJP2Image): Use a ThrowJP2ReaderException macro
	to automatically clean up when throwing an exception.

	* coders/bmp.c (ReadBMPImage): Report an error if RLE decode does
	not produce the expected number of bytes.  Fixes oss-fuzz issue
	6015 "graphicsmagick/coder_BMP_fuzzer: Out-of-memory in
	graphicsmagick_coder_BMP_fuzzer". (Credit to OSS-Fuzz)

2018-02-23  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (DrawImage): Fixed a bug in which graphical
	elements defined within <defs> ... </defs> were being rendered,
	contrary to the SVG spec.

2018-02-23  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (DrawPolygonPrimitive): When filling or
	stroking a polygon using a pattern, the fill (or stroke)
	and group/object opacity values were not being applied to
	the pattern (fixed).

2018-02-23  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/bmp.c (ReadBMPImage): Fix SeekBlob() return value checks.
	Add more EOF checks.  Require that a provided ba_offset be a
	forward seek in order to avoid the possibility of endless looping.

2018-02-23  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/mat.c Fix oss-fuzz issue 6301. (Credit to OSS-Fuzz)

2018-02-22  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/alpha_composite.c (BlendQuantumOpacity): The
	pixel compositing equation used when compositing an
	image into the output was incorrect and has been fixed.

	* magick/render.c (DrawPolygonPrimitive): When
	compositing polygon edge pixels over a transparent
	black background, the code would composite as if the
	background were opaque black, resulting in the edge
	pixels being too dark (fixed).

2018-02-21  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (DrawImage): Per the SVG spec, opacity,
	fill-opacity, and stroke-opacity values are now clamped
	to [0,1].

	Also fixed two bugs introduced by changeset 91de8039f27d
	(dated 2018-02-12): (1) a group/object opacity value
	specified using a percentage was not being converted to a
	value in [0,1]; (2) if fill-opacity or stroke-opacity was
	1, and the group/object opacity value was set to 1, the
	resulting fill-opacity or stroke-opacity value would be
	set to 0 instead of 1.
	
2018-02-19  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/viff.c (ReadVIFFImage): Fix excessive memory usage.
	Fixes oss-fuzz 6006 "graphicsmagick/coder_XV_fuzzer: Out-of-memory
	in graphicsmagick_coder_XV_fuzzer". (Credit to OSS-Fuzz)

	* coders/txt.c (ReadInt): Avoid benign signed integer overflow due
	to accepting an arbitrary number of digits.  Fixes oss-fuzz 6002
	"graphicsmagick/coder_TEXT_fuzzer: Integer-overflow in
	ReadInt". (Credit to OSS-Fuzz)

	* coders/viff.c (ReadVIFFImage): Verify that there is sufficient
	data to back up colormap allocation request.  Fixes oss-fuzz 5986
	"graphicsmagick/coder_VIFF_fuzzer: Out-of-memory in
	graphicsmagick_coder_VIFF_fuzzer". (Credit to OSS-Fuzz)

	* magick/memory.c: Define MAGICK_MEMORY_HARD_LIMIT=value to abort
	when memory request exceeds value.  Useful to find location of
	excessive memory requests.

2018-02-19  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement): Per the SVG spec, the
	SVG coder now initializes the MVG coder (which renders
	SVG graphical elements) with the the SVG defaults for
	fill color, fill-opacity, stroke color, stroke-opacity,
	and stroke-width.  This makes the SVG coder independent
	of the MVG coder intial state.

2018-02-19  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement): Fixed initialization of
	x and y attributes per the SVG spec:  for graphical elements
	"image", "pattern", "text", "rect", and "use", if the x or y
	attribute is not specified, the effect is as if a value of
	"0" were specified.

2018-02-18  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/sun.c (ReadSUNImage): Fix edge case which broke file-size
	validation logic.  Fixes oss-fuzz issue 5981
	"graphicsmagick/coder_SUN_fuzzer: Out-of-memory in
	graphicsmagick_coder_SUN_fuzzer". (Credit to OSS-Fuzz)

	* coders/txt.c (ReadTXTImage): Validate that file size is
	sufficient for claimed image properties.  Fixes oss-fuzz issue
	5960 "graphicsmagick/coder_TXT_fuzzer: Out-of-memory in
	graphicsmagick_coder_TXT_fuzzer". (Credit to OSS-Fuzz)

	* coders/tga.c (ReadTGAImage): Only allow 1 and 8 bit
	colormapped/grey images. Fixes oss-fuzz issue 6314
	"graphicsmagick/coder_ICB_fuzzer: Undefined-shift in
	ReadTGAImage". (Credit to OSS-Fuzz)

	* coders/bmp.c (ReadBMPImage): Detect and report when BMP height
	value is out of range (too negative). Fixes oss-fuzz issue 6394
	"graphicsmagick/coder_BMP_fuzzer: Integer-overflow in
	ReadBMPImage". (Credit to OSS-Fuzz)

	* coders/rla.c (ReadRLAImage): Detect when RLE decoding is
	producing too many samples and report as an error.  Fixes oss-fuzz
	issue 6312 "graphicsmagick/coder_RLA_fuzzer: Timeout in
	graphicsmagick_coder_RLA_fuzzer". (Credit to OSS-Fuzz)

	* coders/fits.c (ReadFITSImage): Validate that file size is
	sufficient for claimed image properties.  Fixes oss-fuzz issue
	6429 "graphicsmagick/coder_FITS_fuzzer: Timeout in
	graphicsmagick_coder_FITS_fuzzer". (Credit to OSS-Fuzz)

	* magick/image.c (CloneImage): Check image pixel limits in
	CloneImage() when it is used to change the image dimensions.  This
	avoids depending on the using code to detect and report such
	issues.

	* coders/xcf.c (ReadXCFImage): Check image pixel limits after each
	CloneImage() to assure that image is within specified resource
	limits.  Fixes oss-fuzz issue 6399 "graphicsmagick/enhance_fuzzer:
	Timeout in graphicsmagick_enhance_fuzzer". (Credit to OSS-Fuzz)

2018-02-16  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (TracePath): TracePath() was not
	correctly processing multiple sets of cubic or quadratic
	Bezier coordinates when the previous path data command was
	not a cubic or quadratic Bezier command.  This would result
	in the first control point being equal to the current path
	point instead of being computed using the current path
	point and the second control point of the previous Bezier
	command.

2018-02-15  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (TracePath): TracePath() was not
	consuming commas (if present) at the end of a set of
	points when multiple sets of points were specified for
	various path commands (e.g., line, Bezier). This
	resulted in the remaining sets of points being ignored
	(fixed).

2018-02-15  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (TraceArcPath): No points are generated
	by TraceArcPath() if the starting and ending arc points
	are the same.  For this case, the coordinate count was not
	being set to zero before returning (fixed).

2018-02-15  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (DrawImage): Clipping of polygons in
	DrawImage() would sometime result in a starting pixel
	location that was greater than the ending pixel location,
	causing a subsequent call to GetImagePixelsEx() to fail
	due a column count <= 0.  Modified the clipping code to
	eliminate this condition, and also to return early if
	the polygon lies completely outside the image boundaries.
	Also fixed variable declarations from a previous commit
	that were causing problems for the C89 compiler.

2018-02-13  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/topol.c (ReadTOPOLImage): Detect EOF immediately rather
	than spinning.  Fixes oss-fuzz issue 6303
	"graphicsmagick/coder_TOPOL_fuzzer: Timeout in
	graphicsmagick_coder_TOPOL_fuzzer". (Credit to OSS-Fuzz)

	* coders/dcm.c (DCM_SetupRescaleMap): Avoid excessive left shift.
	Fixes oss-fuzz issue 6256 "graphicsmagick/coder_DCM_fuzzer:
	Undefined-shift in DCM_SetupRescaleMap". (Credit to OSS-Fuzz)

2018-02-12  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/wpg.c (ExtractPostscript): Detect EOF on input while
	transferring bytes to Postscript file.  Fixes oss-fuzz issue 6087
	"graphicsmagick/coder_WPG_fuzzer: NULL".  Later identified to be
	CVE-2017-17682 as previously discovered in ImageMagick.  (Credit to
	OSS-Fuzz)

	* coders/pdb.c (ReadPDBImage): Quit attempting to read image data
	immediately at EOF. Fixes oss-fuzz issue 6252
	"graphicsmagick/coder_PDB_fuzzer: Timeout in
	graphicsmagick_coder_PDB_fuzzer".  (Credit to OSS-Fuzz)

2018-02-12  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/topol.c (ReadTOPOLImage): Avoid index out of bounds when
	input filename does not use a file extension. Fixes oss-fuzz issue
	6237 "graphicsmagick/coder_TOPOL_fuzzer: Index-out-of-bounds in
	ReadTOPOLImage".  (Credit to OSS-Fuzz)

2018-02-12  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (DrawImage): Object/group opacity,
	when set in DrawImage(), would overwrite the fill
	and stroke opacities. This has been fixed so that
	the object opacity is now combined with the fill
	and stroke opacities per the SVG spec.

2018-02-12  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/mat.c Fix oss-fuzz issue 6021. (Credit to OSS-Fuzz)

2018-02-11  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dcm.c (ReadDCMImage): Avoid undefined left shift of
	short.  Fix memory leaks in error reporting paths.  Fixes oss-fuzz
	issue 6217 "graphicsmagick/coder_DCM_fuzzer: Undefined-shift in
	ReadDCMImage". (Credit to OSS-Fuzz)

	* coders/dpx.c (ReadDPXImage): Avoid divide by zero exception in
	the case where reference high equals reference low. Fixes oss-fuzz
	issue 6215 "graphicsmagick/coder_DPX_fuzzer: Divide-by-zero in
	ReadDPXImage". (Credit to OSS-Fuzz)

	* coders/topol.c (ReadTOPOLImage): Avoid index out of bounds when
	input filename does not use a file extension.

	* coders/cut.c (ReadCUTImage): Avoid index out of bounds when
	input filename does not use a file extension. Fixes oss-fuzz issue
	6218 "graphicsmagick/coder_CUT_fuzzer: Index-out-of-bounds in
	ReadCUTImage".  (Credit to OSS-Fuzz)

	* coders/pwp.c (ReadPWPImage): Force temporary file to be read as
	a SFW file rather than autodetecting the format.  Fixes oss-fuzz
	issue 6220 "graphicsmagick/coder_PWP_fuzzer: Indirect-leak in
	AllocateImage".  (Credit to OSS-Fuzz)

2018-02-10  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pdf.c (WritePDFImage): Assure that xref memory is not
	leaked if an exception is thrown.  Fixes oss-fuzz issue 5968
	"graphicsmagick/coder_EPDF_fuzzer: Direct-leak in MagickRealloc".
	(Credit to OSS-Fuzz)

	* coders/tim.c (ReadTIMImage): Verify that 4/8 bit PSX TIM
	provides a CLUT and verify indexes.  Fixes oss-fuzz issue 5972
	"graphicsmagick/coder_TIM_fuzzer: Null-dereference WRITE in
	ReadTIMImage".  (Credit to OSS-Fuzz)

	* coders/topol.c (ReadTOPOLImage): Add additional header
	validations.  Fixes oss-fuzz issue 5975
	"graphicsmagick/coder_TOPOL_fuzzer: Floating-point-exception in
	ReadTOPOLImage".  (Credit to OSS-Fuzz)

	* coders/bmp.c (ReadBMPImage): Avoid possible division by zero
	when decoding CIE primary values. (Credit to OSS-Fuzz)

	* magick/export.c (ExportViewPixelArea): Only compute
	unsigned_maxvalue if sample_bits <= 32.

	* magick/import.c (ImportViewPixelArea): Assure that
	double_maxvalue minus double_minvalue is not zero, or excessively
	close to zero to avoid divide by zero exception or impossible
	scaling factor. (Credit to OSS-Fuzz)
	(ImportViewPixelArea): Only compute unsigned_maxvalue if
	sample_bits <= 32.

2018-02-09  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dib.c (ReadDIBImage): Validate that image width is not
	too negative such that it's absolute value can not fit in 32-bit
	unsigned width. Resolves oss-fuzz issue 6179
	"graphicsmagick/coder_ICO_fuzzer: Integer-overflow in
	ReadDIBImage". (Credit to OSS-Fuzz)

	* coders/dcm.c (funcDCM_BitsStored): Validate DICOM datum size.
	Use a different means to determine the maximum value which does
	not use excessive shifting.  Resolves oss-fuzz issue 6165
	"graphicsmagick/coder_DCM_fuzzer: Undefined-shift in
	funcDCM_BitsStored". (Credit to OSS-Fuzz)

2018-02-08  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/dpx.c (ReadWordU32BE): Add casts to avoid default type
	promotion from unsigned char to 'int' leading to undefined
	behavior for 24 bit shift. Fixes oss-fuzz issue 6058
	"graphicsmagick/coder_DPX_fuzzer: Undefined-shift in
	ReadWordU32BE". (Credit to OSS-Fuzz)
	(ReadDPXImage): Require that the file has at least one element.
	Add bountiful casts for values which are left-shifted.  Fixes
	oss-fuzz issue 5962 "graphicsmagick/coder_DPX_fuzzer:
	Undefined-shift in ReadDPXImage". (Credit to OSS-Fuzz)

	* coders/dcm.c (DCM_ReadOffsetTable): Add casts Add casts to avoid
	default type promotion from unsigned char to 'int' leading to
	undefined behavior for 16 bit shift. Fixes oss-fuzz issue 5980
	"graphicsmagick/coder_DCM_fuzzer: Undefined-shift in
	DCM_ReadOffsetTable". (Credit to OSS-Fuzz)

	* magick/module_aliases.h (ModuleAliases): Add missing mapping
	from "ICODIB" format to "DIB" module.

	* magick/import.c (ImportUInt32Quantum): Add casts to avoid
	default type promotion from unsigned char to 'int' leading to
	undefined behavior for 24 bit shift.  Fixes oss-fuzz
	"graphicsmagick/coder_P7_fuzzer: Undefined-shift in
	ImportRGBQuantumType". (Credit to OSS-Fuzz)

2018-02-07  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/wpg.c Fix oss-fuzz issue 5964
	"graphicsmagick/coder_MAT_fuzzer: Heap-use-after-free in
	GetLocaleExceptionMessage". (Credit to OSS-Fuzz)

2018-02-07	Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/render.c (IsPoint): Fixed a bug in which
	IsPoint() would reject as a valid coordinate value
	strings that did not begin with an integer: e.g.,
	"0.25" would be accepted, but ".25" would not.

2018-02-07  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/cut.c (ReadCUTImage): Fix DestroyImageInfo() of NULL
	pointer leading to assertion.  Fixes oss-fuzz issue 6067
	"graphicsmagick/coder_CUT_fuzzer: Unknown signal in
	DestroyImageInfo".

	* coders/tga.c (ReadTGAImage): Throw exception rather than
	assertion for unexpected comment size.  Fixes oss-fuzz issue 5961
	"graphicsmagick/coder_ICB_fuzzer: ASSERT: (size_t)
	(tga_info.id_length+1) == commentsize".

2018-02-06  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pdf.c (WritePDFImage): Free 'xref' allocation before
	error return.  Fixes oss-fuzz issue 5968
	"graphicsmagick/coder_EPDF_fuzzer: Direct-leak in MagickRealloc".

2018-02-04  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/pdb.c (ReadPDBImage): Fix heap buffer overflow if blob is
	already at EOF when comment is read.  Fixes oss-fuzz issue 5997
	"graphicsmagick/coder_PDB_fuzzer: Heap-buffer-overflow in
	SetImageAttribute".

	* coders/dpx.c (ReadDPXImage): Fix memory leak of user data if
	user data is truncated.  Fix consumption of one uninitialized
	stack bytes.  Fixes oss-fuzz issue 5973:
	graphicsmagick/enhance_fuzzer: Direct-leak in ReadDPXImage.

	* coders/pnm.c (ReadPNMImage): Detect and avoid division by zero.
	Fixes Issue 5959 in oss-fuzz: graphicsmagick/coder_P7_fuzzer:
	Divide-by-zero in ReadPNMImage

	* magick/xwindow.c (MagickXClientMessage): Eliminate valgrind
	gripe about use of uninitialized stack data by clearing allocation
	to zero.
	(MagickXMakeImage): Eliminate valgrind gripe about use of
	uninitialized heap data by clearing allocation to zero.

	* coders/pwp.c (ReadPWPImage): Remove bogus EOF test on an image
	with a closed blob.  Fixes Issue 5957 in oss-fuzz:
	graphicsmagick/coder_PWP_fuzzer: ASSERT: image->blob->type !=
	UndefinedStream.

	* www/Changes.rst: Fix typo with spelling "ChangeLog-2017.html".
	Resolves SourceForge issue #544 "dead link 2017 changelog page on
	GraphicsMagick web site".

2018-02-03  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/static.c (OpenModule): Assure that status is initialized.
	Resolves Coverity 261207 "Uninitialized scalar variable".

	* wand/magick_wand.c (MagickHasColormap): New function to test if
	the image has a colormap.
	(MagickIsGrayImage): New function to test if the image uses only
	gray pixels.
	(MagickIsMonochromeImage): New function to test if the image uses
	only monochrome pixels.
	(MagickIsOpaqueImage): New function to test if the image uses only
	opaque pixels.
	(MagickIsPaletteImage): New function to test if the image is based
	on a color palette.  Above functions are written by Troy Patteson
	and submitted via SourceForge patch #54 "Wand API patches: has
	colormap, is gray image, is monochrome image, is opaque image, is
	palette image".

	* fuzzing: Added initial OSS-Fuzz integration by Alex Gaynor.
	From SourceForge patch #55 "OSS-Fuzz integration"

	* coders/png.c (ReadMNGImage): Fix free using possibly unallocated
	pointer value.

	* magick/blob.c (SeekBlob): Remove implicit extension of blob
	allocation size based on seek offset.  Besides making an
	assumption about how the blob memory was allocated, this
	reallocation feature provides a memory DOS opportunity.  Resolves
	issue reported by Alex Gaynor via email entitled "Security issue
	with memory management in Magick++" to the graphicsmagick-security
	list on 31 Jan 2018.
	(SeekBlob):

	* coders/jpeg.c (ReadIPTCProfile): Revert inadvertent wrong return
	codes added by change on December 9, 2017.  Fixes SourceForge bug
	542 "Improper call to JPEG library in state 201" since 1.3.28.

2018-02-01  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/annotate.c (RenderFreetype): Fixed the text
	opacity computation in RenderFreeType(). This bug caused
	the text fill color to bleed into the character cell when
	the SVG "fill-opacity" is less than 1.0.

2018-02-01  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* magick/attribute.c (CloneImageAttributes): Fixed a bug
	in which the source image attributes would always replace
	the destination image attributes instead of being appended
	to them, and the destination image attributes would become
	a memory leak.

2018-01-31  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement): Fixed a bug in which the
	x,y location values for a <text> or <tspan> were overwritten
	by the x,y values for the next <tspan> before the previous
	values were used.  This caused the text associated with the
	previous <text> or <tspan> to appear at the location
	specified for the next <tspan>.

2018-01-30  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/static.c: Use !defined(SupportMagickModules) to enable
	static module loader.  Fixes SourceForge bug #543 "Multiple
	definition of "OpenModule" (etc) when cross-compiling shared".

2018-01-29  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement): A terminating '>' in
	a geometry string is interpreted to mean that the dimensions
	of an image should only be changed if its width or height
	exceeds the geometry specification.  For an unapparent and
	undocumented reason, a terminating '>', if present, was
	being nulled out, making this feature unusable for SVG files
	(now fixed).

2018-01-29  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (ReadSVGImage): If there is a geometry string
	in image_info->size (e.g., gm convert -size "50x50%" in.svg
	out.png), AllocateImage() sets image->columns and image->rows
	to the width and height values from the size string.  However,
	this makes no sense if the size string was something like
	"50x50%" (we'll get columns = rows = 50).  So we set columns
	and rows to 0 after AllocateImage(), which is the same as if
	no size string was supplied by the client.  This also results
	in svg_info.bounds to be set to 0,0 (i.e., unknown), so that
	svg_info.bounds will later be set using the image size
	information from either the svg "canvas" width/height or from
	the viewbox.  Later, variable "page" is set from
	svg_info->bounds. Then the geometry string in image_info->size
	gets applied to the (now known) "page" width and height when
	SvgStartElement() calls GetMagickGeometry(), and the intended
	result is obtained.


2018-01-24  Greg Wolfe  <gregory.wolfe@kodakalaris.com>

	* coders/svg.c (SVGStartElement): When the density (DPI)
	is specified using the ImageInfo::density member, the derived
	scale factor is incorrectly applied a second time to the
	width and height members of variable RectangleInfo page.
	Fixes SourceForge ticket #451.

2018-01-23  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/static.c: Use a lazy-loader for static modules with the
	same external interface as the lazy-loader for dynamic modules.

2018-01-20  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* NEWS.txt: Prepare for 1.3.28 release.

2018-01-17  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* NEWS.txt: Update with changes since previous release.

2018-01-14  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* PerlMagick/Magick.xs: Compiler warnings reduction.

	* magick/pixel_cache.h: Mark GetPixels(), GetIndexes(), and
	GetOnePixel() as deprecated.  Compilers may produce a warning if
	these functions are used.

	* magick/pixel_cache.c (InterpolateColor): Return black pixel if
	InterpolateViewColor() reports failure.

	* coders/png.c (ReadMNGImage): Fix memory leak of chunk and
	mng_info in error path.

	* coders/gif.c (ReadGIFImage): Fix memory leak of global colormap.

2018-01-13  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/symbols.h: Fix SourceForge issue #538 "13 symbols in
	common with ImageMagick despite --enable-symbol-prefix".

	* coders/bmp.c (ReadBMPImage): Fix non-terminal loop due to
	unexpected bit-field mask value.  Fixes SourceForge issue #541
	"Infinite Loop in ReadBMPImage (coders/bmp.c)".

	* coders/jpeg.c (JPEGMessageHandler): Revert code added on
	2017-07-08 to promote certain warnings from libjpeg to errors.
	Add code to rationalize claimed image dimensions based on file
	size.  Resolves SourceForge issue #539 "Images with libjpeg
	warnings result in error".

2018-01-11  Fojtik Jaroslav  <JaFojtik@seznam.cz>

	* coders/wpg.c Recursive ReadImage could return multiple scenes
          fixed.

2018-01-07  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* coders/png.c (ReadOnePNGImage): Quit 'passes' loop if we
	encountered an error

	* magick/pixel_cache.c (SetNexus): Fix heap overwrite in
	AcquireCacheNexus() due to SetNexus() not using an allocated
	staging area for the pixels like it should.  This problem impacts
	all 1.3.X releases.  Resolves SourceForge issues 532
	"heap-buffer-overflow bug in ReadWPGImage" and #531
	"heap-buffer-overflow in AcquireCacheNexus".

	* magick/pixel_cache.c (InterpolateViewColor): Now returns
	MagickPassFail rather than void.  Code using this function is
	updated to check the return status.

2018-01-01  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/describe.c (DescribeImage): Discriminate between
	AcquireImagePixels() returning NULL or finding a transparent
	pixel.  This avoids use of a null pointer in the case where
	AcquireImagePixels() returns NULL.

2017-12-31  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* magick/static.c: Change static module initialization to be based
	on an initialized list rather than a squence of function calls in
	order to simplify maintenance and possibly address future
	requirements.

2017-12-30  Bob Friesenhahn  <bfriesen@simple.dallas.tx.us>

	* Copyright.txt: Bump copyright years and rotate ChangeLog.