GraphicsMagick ChangeLog - 2020

2020-12-30 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• utilities/tests/convert-cmds.txt: A list of convert commands to exercise.

• utilities/tests/convert.tap: TAP script to exercise convert commands.

• coders/identity.c (ReadIdentityImage): Don't lose exception info if an image is not returned.

• tests/rwfile_sized.tap: Add tests for CMYK, RGB, and RGBA raw interlaced files.

• tests/rwblob.c (main): Add a -interlace option.

• tests/rwfile.c (main): Add a -interlace option.

• coders/cmyk.c (ReadCMYKImage): Fix broken reading of planar CYMYK/CMYKA files. Regression added in the 1.3.27 release.

• coders/rgb.c (ReadRGBImage): Fix broken reading of planar RGB files. This regression was added while adding security fixes starting in the 1.3.27 release. Fixes SourceForge issue #637 "Import of raw RGB image data fails since 1.3.27.

• coders/dpx.c: Add casts to avoid warnings when compiling under MinGW.

• coders/meta.c (super_fgets_w): Assure that returned pointer value is the same as reported via 'b'. Use size_t for sizes rather than int. (super_fgets): Assure that returned pointer value is the same as reported via 'b'. Use size_t for sizes rather than int.

• coders/miff.c (ReadMIFFImage): 'i' should be unsigned. (WriteMIFFImage): 'i' should be unsigned.

2020-12-29 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/mpc.c (ReadMPCImage): 'i' should be unsigned.

• magick/random.c (InitializeMagickRandomKernel): 'done' is not used in all compilation implementations.

• magick/nt_feature.c (CropImageToHBITMAP): Dependent on HasWINGDI32. (ImageToHBITMAP): Dependent on HasWINGDI32.

• coders/jp2.c: JasPer changed its jas_stream_ops_t callback interfaces in releases 2.0.19 and 2.0.20. Provide the newer interfaces by default, but use a MAGICK_JP2_OLD_STREAM_INTERFACE pre-processor definition to support selecting the old interfaces. This mostly eliminates compilation warnings since the interfaces are mostly binary compatible (within the positive range of an integer). In the 1.3.36 a MAGICK_JP2_NEW_STREAM_INTERFACE definition was supported. It is assumed that Jasper libraries should soon be updated to the latest version due to severe security defects in older releases.

• configure.ac: The gdi32 test was faulty since both gdi32 and user32 libraries are required.

2020-12-26 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• version.sh: Updates in preparation for the 1.3.36 release.

• bootstrap: Fix config.guess and config.sub download URLs.

2020-12-25 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• design/pixel-cache.dot: Fix reported syntax errors.

• coders/mpc.c (ReadMPCImage): Report correct exception reason.

• coders/miff.c (ReadMIFFImage): Arbitrarily limit the number of header keywords to avoid DOS attempts. (ReadMIFFImage): Finish updates to use resource-limited memory allocator. (WriteMIFFImage): Finish updates to use resource-limited memory allocator.

• coders/mpc.c (ReadMPCImage): Arbitrarily limit the number of header keywords to avoid DOS attempts. Fixes oss-fuzz 28956 "Timeout - coder_MPC_fuzzer".

2020-12-24 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (AffineEdge): Use MagickDoubleToLong();

• magick/utility.c (MagickDoubleToLong): New private function to convert a 'double' to a 'long' with the minimum amount of harm.

• magick/segment.c (Classify): Remove variables from function global scope that don't need outer scope.

• coders/jp2.c: JasPer changed its jas_stream_ops_t callback interfaces in releases 2.0.19 and 2.0.20. Revert to providing the older interfaces by default, but use a MAGICK_JP2_NEW_STREAM_INTERFACE pre-processor definition to support selecting the new interfaces. We don't know how to usefully tell the JasPer version at compile time! Luckily, using the older interfaces only causes a compiler warning rather than a run-time issue.

• coders/mac.c (ReadMACImage): Use size_t type for 'ldblk' to avoid possible overflow.

2020-12-23 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• NEWS.txt: Update the news to the date December 23, 2020.

2020-12-22 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/image.c (AllocateImage): Satisfy conditions for DestroyImage() as soon as possible and use it for clean-up on error. Added more error checks. (CloneImage): Satisfy conditions for DestroyImage() as soon as possible and use it for clean-up on error. Don't attempt to copy colormap if colors is zero. Added more error checks. (DestroyImage): Assure that we can destroy a partially-constructed Image.

• magick/effect.c (BlurImage): Fix null pointer dereference if image failed to be created. (DespeckleImage): Fix null pointer dereference if image failed to be created. (EnhanceImage): Fix null pointer dereference if image failed to be created. (GaussianBlurImage): Fix null pointer dereference if image failed to be created. (MedianFilterImage): Fix null pointer dereference if image failed to be created. (MotionBlurImage): Fix null pointer dereference if image failed to be created. (ReduceNoiseImage): Fix null pointer dereference if image failed to be created. (ShadeImage): Fix null pointer dereference if image failed to be created. (SharpenImage): Fix null pointer dereference if image failed to be created. (SpreadImage): Fix null pointer dereference if image failed to be created.

2020-12-21 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/jp2.c (BlobWrite): Update Jasper stream OPs callback function signatures to exactly match latest jas_stream_ops_t definition. This avoids an annoying warning when using Jasper 2.0.23 but now causes annoying warnings when using 2.0.12 or 1.900.1. There does not appear to be a useful way to determine the Jasper numeric version (only a C string is available) from its header files.

• magick/decorate.c (FrameImage): Skip attempting to render top or bottom of ornamental border if its height is zero.

• magick/image.c (CloneImage): Set image signature right away in case it needs to be destroyed while it is being constructed.

• wand/drawtest.c (main): MagickGetFilename() allocates a new string so make sure to free it.

• tests/constitute.c (main): Destroy ExceptionInfo to avoid memory leak if an exception was thrown.

• magick/effect.c (EdgeImage): Fix null pointer dereference if edge image failed to be created.

• magick/compress.c (HuffmanEncode2Image): Fix error handling issues.

• magick/command.c (CompareImageCommand): Fix memory leaks when an input image failed to be read. (CompositeImageCommand): Fix memory leaks when an input image failed to be read.

• coders/fax.c (WriteFAXImage): Fix error handling.

• coders/mpc.c (ReadMPCImage): Use correct deallocator for page geometry. Fixes oss-fuzz 28853 "Heap-buffer-overflow READ {*} - _MagickReallocateResourceLimitedMemory".

2020-12-20 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/yuv.c: Use resource-limited memory allocator.

• coders/xwd.c: Use resource-limited memory allocator.

• coders/xpm.c: Use resource-limited memory allocator.

• coders/xcf.c: Use resource-limited memory allocator.

• coders/xbm.c: Use resource-limited memory allocator.

• coders/wpg.c: Use resource-limited memory allocator.

• coders/viff.c: Use resource-limited memory allocator.

• coders/vicar.c: Use resource-limited memory allocator.

• coders/uil.c: Use resource-limited memory allocator.

• coders/txt.c: Use resource-limited memory allocator.

• coders/topol.c: Use resource-limited memory allocator.

• coders/tim.c: Use resource-limited memory allocator.

• coders/tiff.c: Use resource-limited memory allocator.

• coders/tga.c: Use resource-limited memory allocator.

• coders/sun.c: Use resource-limited memory allocator.

• coders/sgi.c: Use resource-limited memory allocator.

• coders/sfw.c: Use resource-limited memory allocator.

• coders/rle.c: Use resource-limited memory allocator.

• coders/rla.c: Use resource-limited memory allocator.

• coders/rgb.c: Use resource-limited memory allocator.

• coders/psd.c: Use resource-limited memory allocator.

• coders/ps3.c: Use resource-limited memory allocator.

• coders/ps2.c: Use resource-limited memory allocator.

• coders/pnm.c: Use resource-limited memory allocator.

• coders/pdf.c: Use resource-limited memory allocator.

• coders/pdb.c: Use resource-limited memory allocator.

• coders/pcl.c: Use resource-limited memory allocator.

• coders/pcd.c: Use resource-limited memory allocator.

• coders/palm.c: Use resource-limited memory allocator.

• coders/mtv.c: Use resource-limited memory allocator.

• coders/mpc.c: Use resource-limited memory allocator.

• coders/meta.c: Use resource-limited memory allocator.

• coders/map.c: Use resource-limited memory allocator.

• coders/jpeg.c: Use resource-limited memory allocator.

• coders/jp2.c: Use resource-limited memory allocator.

• coders/jnx.c: Use resource-limited memory allocator.

• coders/icon.c: Use resource-limited memory allocator.

• coders/hrz.c: Use resource-limited memory allocator.

• coders/histogram.c: Use resource-limited memory allocator.

• coders/gray.c: Use resource-limited memory allocator.

• coders/fpx.c: Use resource-limited memory allocator.

• coders/emf.c: Use resource-limited memory allocator.

• coders/dpx.c: Use resource-limited memory allocator.

• coders/dps.c: Use resource-limited memory allocator.

• coders/dcm.c: Use resource-limited memory allocator.

• coders/cut.c: Use resource-limited memory allocator.

• coders/cmyk.c: Use resource-limited memory allocator.

• coders/cineon.c: Use resource-limited memory allocator.

• coders/avs.c: Use resource-limited memory allocator.

• coders/art.c: Use resource-limited memory allocator.

• coders/pcx.c: Use resource-limited memory allocator.

• coders/mac.c: Use resource-limited memory allocator.

• coders/pict.c: Use resource-limited memory allocator.

• magick/memory.c (_MagickReallocateResourceLimitedMemory): Add a 'clear' parameter which indicates that freshly allocated memory should be zeroed. Added "Cleared" versions of the private managed memory macros and updated all managed memory macros to exclusively use this function.

2020-12-19 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• Update Automake to 1.16.3 and bootstrap to pick up latest config.guess and config.sub.

2020-12-17 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/miff.c (ImportRLEPixels): Change from C assertion to exception report. Fixes oss-fuzz 28703 "ASSERT · ((quantum_type == IndexQuantum) && (image->storage_class ...". (ReadMIFFImage): Read Gray DirectClass image as PseudoClass so it has a colormap, and we have a RLE decode implementation for it.

2020-12-15 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/paint.c (OpaqueImage): Changing the image storage class is not required.

2020-12-14 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/paint.c (OpaqueImage): Assure that image type is promoted as required based on fill color. Fixes unexpected results discovered by Stuart McDonagh and reported via the graphicsmagick-help mailing list on December 14, 2020.

2020-12-13 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Set '[MVG]' image attribute at appropriate places outside of DrawImage() since DrawImage() sometimes recurses into itself, trashing the image attribute. One example of recursion is in the text annotation code.

• coders/svg.c (ReadSVGImage): Properly support 'ping' mode so 'identify' works as expected.

• magick/render.c (InsertAttributeIntoInputStream): Provide a more useful diagnostic for when a "use" or "class" argument id is not defined.

2020-12-12 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Fix regression when parsing "mask" which was added by changeset 16305:f33a0fb3d8e4 on July 15, 2020 since the last formal release. This impacts MVG and SVG.

2020-12-08 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• www/INSTALL-unix.rst: Document the '--disable-compressed-files' configure option, which was added on July 15th.

2020-12-06 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/magic.c: Don't send files which test positive for PCL to the HPGL delegate, which is normally 'hp2xx'. Fixes SourceForge bug 607 "Slow to convert HP PCL printer data".

2020-12-05 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Use unique image attribute space for MVG symbols. Fixes oss-fuzz 28111 "Timeout - coder_MVG_fuzzer", oss-fuzz 28170 "Stack-overflow - DrawImage", and oss-fuzz 28292 "Integer-overflow - DrawPolygonPrimitive".

2020-12-04 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Verify that affine scaling factors are not zero. Fixes oss-fuzz 28293 "Divide-by-zero - InverseAffineMatrix". (DrawPolygonPrimitive): Thread error status check was at wrong scope, resulting in code executing when it should have quit.

2020-12-03 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/magick_types.h.in: Stop trying to define PTRDIFF_MAX.

2020-11-29 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/magick_types.h.in: Provide PTRDIFF_MAX for Visual Studio if it is missing.

• fuzzing/oss-fuzz-build.sh: Disable old JPEG support in libtiff.

• coders/mat.c (ReadMATImage): Use resource-limited memory allocator. (WriteMATLABImage): Use resource-limited memory allocator.

2020-11-28 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• NEWS.txt: Update the news to the date November 28, 2020.

• coders/png.c (ReadOneJNGImage): Verify and enforce Alpha_compression_method values. Request that color and alpha decoders return just one frame. Force decoder format to disable auto-detection. Assume that coder messed up and might have returned more than one frame. Fixes oss-fuzz 28013 "Indirect-leak . MagickMalloc".

• magick/memory-private.h (MagickReallocateResourceLimitedMemory): Fix typo in macro definition which resulted in a memory reallocation leak!

• Magick++/lib/Magick++/Drawable.h: Decided to continue using std::unary_function if C++ version is less than C++'17 since otherwise it may be changing an interface.

2020-11-27 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/gif.c (ReadGIFImage): Use resource-limited memory allocator when reading the comment extension.

• Magick++/lib/Magick++/Drawable.h: Remove inheritance from std::unary_function, which was removed in C++'17.

• coders/webp.c (ReadWEBPImage): Use resource-limited memory allocator. (WriteWEBPImage): Use resource-limited memory allocator.

• coders/jbig.c (WriteJBIGImage): Use resource-limited memory allocator.

• coders/fits.c (ReadFITSImage): Use resource-limited memory allocator. (WriteFITSImage): Use resource-limited memory allocator.

• coders/dib.c (ReadDIBImage): Use resource-limited memory allocator. (WriteDIBImage): Use resource-limited memory allocator.

• coders/bmp.c (ReadBMPImage): Use resource-limited memory allocator. (WriteBMPImage): Use resource-limited memory allocator.

2020-11-26 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/tiff.c (ReadTIFFImage): Improve RGBATiledMethod progress monitor so it reports more steps. (ReadTIFFImage): Improve TiledMethod progress monitor so it reports more steps.

• fuzzing/utils.cc (class MagickState): Enable tracing of exception events in order to help discover the origin of errors. If too much output comes out, then this will be removed.

• magick/render.c (ConvertPathToPolygon): Attempt to fix leak of 'points' on memory allocation failure.

2020-11-25 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (ConvertPathToPolygon): Make sure not to leak points from added Edge. Fixes oss-fuzz 27608 "Direct-leak in _MagickReallocateResourceLimitedMemory". (DrawDashPolygon): Place an aribrary limit on stroke dash polygon unit maximum length in order to avoid possibly rendering "forever". Addresses oss-fuzz 24236 "Timeout in coder_MVG_fuzzer".

2020-11-23 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawPolygonPrimitive): Try to minimize the impact of too many threads due to replicated data until such time as the data structures can be re-designed to directly support threading.

2020-11-21 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• www/Hg.rst: Describe how to clone the repository from SourceForge using the ssh protocol rather than https.

• coders/ps.c (WritePSImage): Fix problem when writing PseudoClass image with a colormap larger than two entries as bilevel. Previous implementation was assuming that the colormap would only include two entries for a monochrome image, but many entries may exist in the colormap which were never used. Fixes SourceForge issue #635 "gm convert failure from .pgm to .eps".

2020-11-20 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• fuzzing/utils.cc (class MagickState): Set DiskResource limit to zero so that pixel cache won't spill over to using temporary files.

2020-11-16 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• NEWS.txt: Update the news to the date November 16, 2020.

2020-11-15 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/svg.c (ReadSVGImage): Fix memory leak due to CDATA block, and some other possible small leaks.

• magick/magick.c (InitializeMagickEx): Set C pre-processor definition USE_GLIBC_MTRACE to 1 in order to enable Linux mtrace support.

• magick/render.c (ConvertPathToPolygon): Fix memory leak upon memory reallocation failure. Addresses oss-fuzz 27351 "Direct-leak in _MagickReallocateResourceLimitedMemory".

• magick/memory.c (_MagickReallocateResourceLimitedMemory): Return pointer to the allocation similar to realloc() and do not automatically free existing memory upon allocation failure.

2020-11-08 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• common.shi.in: Apply some resource limits while running the test suite. (Q8_MEMORY_LIMIT): Set the test suite memory limit to 128MB for Q8, or 256MB for Q16, or 512MB for the Q32 build. (MAGICK_LIMIT_DISK): Set the test suite disk space limit to 0 to avoid spilling over into disk files when the memory limit runs out.

• coders/miff.c (WriteMIFFImage): Update to use resource-limit respecting memory allocators.

2020-11-07 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/miff.c (ReadMIFFImage): Update to use resource-limit respecting memory allocators.

• magick/render.c (DrawImage): Update to use resource-limit respecting memory allocators.

• magick/memory.c (_MagickReallocateResourceLimitedMemory): Add new private interfaces for allocating private memory while respecting resource limits.

2020-10-25 Bob Friesenhahn <bfriesen@bobsdell>

• magick/render.c (DrawImage): Reject pattern image with a dimension of zero. Fixes oss-fuzz issue 26382 "graphicsmagick:coder_MVG_fuzzer: Floating-point-exception in DrawPrimitive".

2020-10-15 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/constitute.c (ConstituteImage): Set image depth appropriately based on the storage size specified by StorageType and QuantumDepth.

2020-10-11 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawPrimitive): Use DestroyImageList() to destroy composite_image since it may be a list. Fixes oss-fuzz 25247 "Indirect-leak in MagickMalloc". (DrawPrimitive): Add ImageInfo properties to request only returning the first frame if the in-line image is a list. Also, add a missing DestroyImageList() request if multiple-frames were returned.

• magick/transform.c (TransformImage): Use ReplaceImageInList() replace transformed image in list.

• magick/list.c (ReplaceImageInList): Remove previous and next references from removed image before destroying it.

• magick/render.c (DrawClipPath): Remove break statement so that added clip-mask image is initialized properly and rendered-on as expected. Thanks to László Böszörményi for reporting this problem prior to release.

2020-10-03 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• configure.ac (AC_PROG_CC_STDC): AC_PROG_CC_STDC is no longer required since AC_PROG_CC now provides its useful function. AC_PROG_CC_STDC is marked as obsolete after Autoconf 2.69. Quote all arguments to m4 macros.

2020-09-28 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• configure.ac: Update syntax to avoid using deprecated syntax according to Autoconf 2.69.

2020-09-21 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/webp.c (ReadWEBPImage): Use SetImageProfile() rather than AppendImageProfile().

2020-09-20 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• wand/magick_wand.c (MagickSetSamplingFactors): Correct formatting of sampling factors string. Fixes SourceForge issue 633 "MagickSetSamplingFactors() API mismatch - comma separated values instead of 1x1 ".

2020-09-14 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawPrimitive): Improve error checking related to ImagePrimitive.

• magick/resize.c (ResizeImage): If CloneImage() of resize_image to source_image fails then free source_image allocation before returning in order to prevent memory leak.

• magick/image.c (CloneImage): Free clone_image allocation if ImgExtra allocation fails in order to prevent memory leak. Fixes oss-fuzz 25342 "Indirect-leak in MagickMalloc". (SetImageOpacity): SetImageOpacity() now returns error status since it is possible for it to fail.

2020-09-13 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/tiff.c (ReadTIFFImage): Ignore corrupt whitepoint and primary chromaticities tags. Fixes oss-fuzz issue 25507 "Divide-by-zero in DoubleToRational". The divide by zero is actually in libtiff, but the bad values from the input file were propagated through GraphicsMagick.

2020-09-09 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/analyze.c (GetImageBoundingBox): Use solution proposed by Troy Patteson to solve SourceForge issue 345 "MagickTrimImage with extreme fuzz can produce image with negative width".

2020-08-16 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/tiff.c (ReadTIFFImage): Apply the same resource limits to TIFF tile sizes as apply to the image itself. Fixes oss-fuzz issues 24523 "Timeout in coder_TIFF_fuzzer" and 24810 "Timeout in coder_PTIF_fuzzer".

2020-08-13 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• configure.ac: Add --without-gdi32 configure option to support disabling use of the Microsoft Windows gdi32 library if it is not wanted.

2020-08-12 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• configure.ac: Remove the assumption that a native Windows build means that Ghostscript may be available so that MinGW tests which depend on Ghostcript are attributed proper XFAIL status by the test suite.

2020-08-10 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/magick.c (MagickCondSignal): Explicitly initialize 'oact' prior to calling sigaction() in order to attempt to surmount apparent oss-fuzz framework issue.

2020-08-09 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/delegate.c, magick/magick.c, magick/nt_base.c: Fix compilation errors under MinGW when Ghostscript support is disabled.

2020-08-08 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/nt_base.c: Fix compilation issue noticed under MinGW.

• magick/render.c (DrawImage): Handle the case that ExtractTokensBetweenPushPop() can return NULL. Fixes oss-fuzz 24659 "Null-dereference READ in DrawImage".

• magick/magick.c (MagickCondSignal): Re-implement to handle the case where a new-style 'siginfo' signal handler was previously registered, as well as the legacy type. This may address oss-fuzz 24690 "Use-of-uninitialized-value in MagickCondSignal".

2020-07-26 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• wand/drawtest.c: Use structured error handling and report all output to stderr so it does not screw up TAP tests.

• magick/render.c (DTOLONG_MIN): Correct 32-bit definition of DTOLONG_MIN.

• wand/wandtests.tap: Wand drawtest requires FreeType.

• NEWS.txt: Update with changes up to 2020-07-26.

• VisualMagick/magick/magick_config.h.in (HasGS): Default HasGS to enabled.

• configure.ac: Add a --without-gs configure option to disable reading PS, EPS, and PDF formats via an external Ghostscript delegate program. This is intended as an absolute security measure for sites that want to be assured to avoid executing Ghostscript even though it is installed on the system. Removal of PS and PDF reading support breaks reading other formats which are handled by executing an external program to first convert to PS or PDF formats.

• magick/delegate.c (InvokePostscriptDelegate): Use HasGS to enable use of the Ghostscript delegate. Change the existing legacy HasGS ifdefs to HasGSLIB.

2020-07-23 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/tiff.c (WriteTIFFImage): Fix compilation error when COMPRESSION_WEBP is not defined.

2020-07-20 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• configure.ac: Fix enableval syntax for --disable-compressed-files.

2020-07-19 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/command.c (CompareImageCommand): Merge changeset by 谢致邦 (XIE Zhibang) which adds 'matte' support to the compare command. However, substantially reduce the amount of changes by avoiding adding a new public function. Documentation regarding how 'compare' uses this option is also added.

• magick/command.c: Merge changeset by谢致邦 (XIE Zhibang) regarding Some duplicate "verbose" should be "version".

• configure.ac, magick/blob.c: Merge changeset by Przemysław Sobala regarding "Configure: add --with(out)-compressed-files option". The configure option was changed to --disable-compressed-files during the merge since it is more appropriate.

2020-07-15 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• NEWS.txt: Update with changes up to 2020-07-15.

• magick/render.c (DrawImage): Improve error handling so errors are returned when they should be. Fixes oss-fuzz 24117 "Stack-overflow in DrawImage" and oss-fuzz 24126 "Timeout in coder_MVG_fuzzer". Restore the original behavior of DrawClipPath() when there is no matching clip-path attribute.

2020-07-12 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• NEWS.txt: Update with changes up to 2020-07-12.

2020-07-11 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/xwindow.c (MagickXVisualColormapSize): Fix UBSAN integer overflow warning.

• magick/render.c (DrawClipPath): Report only a warning if there is no clip mask. (ExtractTokensBetweenPushPop): Verify that the expected/required pop statement is indeed found. Fixes oss-fuzz 23498 "Timeout in coder_MVG_fuzzer".

2020-06-14 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/constitute.c (ReadImage): Improve error handling related to ImageToFile().

• magick/image.c (SetImageInfo): Improve error handling related to ImageToFile().

• coders/mat.c: Check MagickFindRawImageMinMax() return status.

• magick/constitute.c (MagickFindRawImageMinMax): Verify that the original seek position was restored.

2020-06-13 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Apply stricter range limits when converting a double to a long in order to avoid integer overflow. Fixes oss-fuzz 23304 "Integer-overflow in DrawImage". (DrawClipPath): If there is no matching clip-path attribute then return an informative error. Fixes oss-fuzz 23187 "Stack-overflow in DrawImage" which is actually a case of DrawImage() / DrawClipPath() recursion.

2020-06-06 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/wpg.c (UnpackWPGRaster): Fix oss-fuzz 23042 "Heap-buffer-overflow in ImportGrayQuantumType" and oss-fuzz "Heap-buffer-overflow in InsertRow" which are both from the same cause.

2020-06-01 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/pixel_cache.c (ClipCacheNexus): Change x and y variables to unsigned type.

2020-05-31 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/tiff.c (WriteTIFFImage): WebP compression only supports a depth of 8. Fixes oss-fuzz 22560 "Use-of-uninitialized-value in GammaToLinear".

2020-05-30 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/wpg.c (ReadWPGImage): Terminate reading when a pixel cache resource limit is hit rather than moving on to heap buffer overflow. Fixes oss-fuzz 20045, 20318, 21956

• coders/png.c (ReadMNGImage): If the image width is 1, then X magnification is done by by simple pixel replication. If the image height is 1, then Y magnification is done by simple pixel replication. Fixes oss-fuzz issue 19025 "Heap-buffer-overflow in ReadMNGImage" and oss-fuzz issue 19026 "ASSERT: yy < (long) large_image->rows". It appears that CERT has assigned CVE-2020-12672 for oss-fuzz issue 19025. Note that the heap overwrite is only one byte.

2020-05-01 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• NEWS.txt: Update with changes up to 2020-04-23.

2020-04-23 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/dpx.c (ReadDPXImage): Support dpx:swap-samples-read define which behaves similar to dpx:swap-samples, but is only applied when reading. This provides for use when there is both reading and writing in the same operation. (WriteDPXImage): Support dpx:swap-samples-write define which behaves similar to dpx:swap-samples, but is only applied when writing. This provides for use when there is both reading and writing in the same operation.

2020-04-18 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick: Fix remaining GCC 10 warnings.

2020-04-17 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/transform.c (GetImageMosaicDimensions): Mark function as pure.

• magick/effect.c (GetNonpeakMedianList): Mark function as pure.

• coders/fits.c (InsertRowHDU): Fix scary-sounding GCC 10 warning, which is actually benign.

• config/config.sub: Update to latest config.sub

• config/config.guess: Update to latest config.guess.

• Makefile.am: Update to Automake 1.16.2

2020-04-04 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/dpx.c (ReadRowSamples): Simplify 10-bit packed decoding. (WriteRowSamples): Simplify 10-bit packed encoding.

• coders/locale.c (ReadConfigureFile): Ignore comment element if it was not found or is too short.

• magick/pixel_cache.c (ReadCacheIndexes): If SetNexus() has previously failed to allocate the staging buffer and thus reported an exception to the user, then ReadCacheIndexes() should report an error rather than blundering into copying indexes data to a null pointer.

• magick/effect.c (AdaptiveThresholdImage): Assure that we don't attempt to write to output pixels if they have not been selected yet.

• magick/utility.c (ExpandFilenames): Properly handle NULL filelist and NULL filelist entries. (GetGeometry): Assure that there is no one-character stack read overflow when reading the geometry buffer.

2020-03-29 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• fuzzing/oss-fuzz-build.sh: Restore xz to oss-fuzz build due to build problems getting worked out.

2020-03-28 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• fuzzing/oss-fuzz-build.sh (MAGICK_LIBS): Remove mention of liblzma.a in the oss-fuzz build until its build problems get worked out.

2020-03-27 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• fuzzing/oss-fuzz-build.sh: Skip building xz in the oss-fuzz build until its build problems get worked out.

2020-03-25 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/log.c (InitializeLogInfoPost): Don't load log.mgk if logging is already configured to use MethodOutput.

2020-03-24 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/log.c (InitializeLogInfoPost): Mark that logging is configured, regardless of if "log.mgk" was discovered.

2020-03-23 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• VisualMagick/magick/magick_config.h.in: ProvideDllMain is now disabled by default since it causes InitializeMagick() to be invoked prior to when the program's main() routine is called, thereby blocking configuration activities or use of InitializeMagickEx(). With this change it is even more imperative that InitializeMagick() be explicitly invoked by all programs using GraphicsMagick.

• magick/log.c (LogMagickEventList): Always use/respect the configured log format as might be obtained from "log.mgk" or SetLogDefaultFormat().

• magick/utility.c (MagickFormatString): Return the size of the formatted string. (MagickFormatStringList): Return the size of the formatted string. (FormatString): Return the size of the formatted string. (FormatStringList): Return the size of the formatted string.

2020-03-22 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• www/api/types.rst: Improved types documentation and added more hyperlinks.

• scripts/format_c_api_doc.py: Add hyperlinks for 'LogMethod' and 'LogOutputType' type documentation.

• Magick++/lib/Image.cpp (SetLogDefaultEventType): New C++ function to forward to C interface. (SetLogDefaultGenerations): New C++ function to forward to C interface. (SetLogDefaultLimit): New C++ function to forward to C interface. (SetLogDefaultFormat(): New C++ function to forward to C interface. (SetLogDefaultLogMethod): New C++ function to forward to C interface. (SetLogDefaultFileName): New C++ function to forward to C interface. (SetLogDefaultOutputType): New C++ function to forward to C interface.

• magick/log.c (SetLogDefaultEventType): New function to support setting the default set of events which will result in a log event. (SetLogDefaultGenerations): New function to specify the maximum number of log files maintain before circulating back to overwrite the first name. (SetLogDefaultLimit): New function to specify the maximum number of logging events which may occur before creating a new log file. (SetLogDefaultLogMethod): New function to provide a call-back function to be invoked for each log event when the logging method type is MethodOutput. (SetLogDefaultOutputType): New function to set the logging output destination. (SetLogDefaultFormat): New function to provide the format of the logging output. (SetLogDefaultFileName): New function to provide the file name, or file path, to be written to for each log event. (InitializeLogInfo): If a default logging callback was provided via SetLogDefaultLogMethod() then skip searching for "log.mgk". In this case it is assumed that the API user has already changed any other logging default which would have been updated by "log.mgk" so it would be harmful to search for it, or read from it.

2020-03-10 Troy Patteson <troyp@ieee.org>

• coders/png.c (WriteOnePNGImage): Don't skip optional Exif identifier code if it isn't present.

2020-03-08 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/pixel_cache.c (ModifyCache): Destroy clone_image.cache if ClonePixelCache() reports failure. Fixes oss-fuzz 20871 "graphicsmagick:coder_MVG_fuzzer: Direct-leak in MagickMallocAligned".

• magick/log.c (LogMagickEventList): Prepare source module base name more efficiently. Move MethodOutput implementation to the front so it is not filtered by other active blocks. (LogMagickEventList): Cache broken-down time structure in LogInfo and recompute only when needed.

2020-03-07 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/resize.c (HorizontalFilter): Improve tracing. (VerticalFilter): Improve tracing. (ResizeImage): Improve tracing.

• www/api/api.rst: Add functions from log.c and render.c.

• magick/log.c (DestroyLogInfo): DestroyLogInfo is no longer marked MagickExport.

2020-03-04 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/api.h: Add "magick/enum_strings.h" to API headers. Requested by Przemysław Sobala via posting to the graphicsmagick-help mailing list on 2020-02-27.

• scripts/html_fragments.py: Automatically generate HTML footer content and include commented HTML fragment which may be substituted with SF tracker for SourceForge web site.

2020-02-23 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• version.sh: Updates in preparation for the 1.3.35 release.

• www/INSTALL-windows.rst: Update Windows installation and build documentation.

2020-02-22 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• NEWS.txt: Update with News since previous release.

• magick/magick.c (InitializeMagickSignalHandlers): This private implementation function is now a static function as it should have been. (InitializeMagickEx): New function which may be used in place of InitializeMagick() to initialize GraphicsMagick. This initialization function returns an error status value, may update a passed ExceptionInfo structure with error information, and provides an options parameter which supports simple bit-flags to tailor initialization. The signal handler registrations are skipped if the MAGICK_OPT_NO_SIGNAL_HANDER flag is set in the options.

2020-02-19 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/magick.c (MagickToMime): Add a MIME translation for "jpg". Issue reported by Pro Turm.

2020-02-18 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• www/INSTALL-windows.rst: Add quoting to avoid losing backslashes in Windows paths.

2020-02-16 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/common.h: Add missing unsupported handling for some recently added GCC/Clang attributes.

• magick/: Move all remaining private implementation code in public headers which is guarded by MAGICK_IMPLEMENTATION into private headers, which are never installed.

2020-02-15 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/tiff.c (WriteTIFFImage): Evidence suggests that large strip sizes improve performance by reducing the number of I/Os. The defaults suggested by libtiff are way to small for today's images and computers. Default TIFF strip sizes so that each uncompressed strip consumes up to 1MiB of memory, or 4MiB for FAX oriented codecs, or based on LZMA compression level when using LZMA compression. The default size may be adjusted via the TIFF_BYTES_PER_STRIP preprocessor definition.

2020-02-09 Fojtik Jaroslav <JaFojtik@seznam.cz>

• coders/wpg.c ZeroFillMissing data will never been triggered when y>=image->rows.

2020-02-09 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Limit pattern dimensions by LONG_MAX rather than ULONG_MAX since this seems more likely to avoid arithmetic overflows later on.

2020-02-09 Fojtik Jaroslav <JaFojtik@seznam.cz>

• coders/wpg.c Check for exception in image.

2020-02-09 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/command.c (VersionCommand): Add Google perftools tcmalloc to the available feature support.

• www/INSTALL-unix.rst: Include some information about building with MSYS2.

• coders/png.c (ReadOnePNGImage): Eliminate compilation warnings about signed/unsigned comparisons.

• magick/image.c: Remove private global string constants, and one private global unsigned long constant, from the library ABI. Since the global constants were declared via a private header and only used within the GraphicsMagick build, removing these does not impact the public ABI. The globals removed are BackgroundColor, BorderColor, DefaultTileFrame, DefaultTileGeometry, DefaultTileLabel, ForegroundColor, HighlightColor, MatteColor, PSDensityGeometry, PSPageGeometry, and DefaultCompressionQuality.

2020-02-08 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Apply draconian pattern specification offset and dimension validations. Hopefully there is no impact to usability. If so please report it as a bug. Fixes oss-fuzz 20586 "graphicsmagick:coder_MVG_fuzzer: Integer-overflow in DrawPolygonPrimitive".

• coders/svg.c (ReadSVGImage): Fix dereference of NULL pointer when stopping image timer.

2020-02-06 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/pict.c (DecodeImage): Allocate extra scanline memory to allow small RLE overrun. Fixes oss-fuzz 20271 "graphicsmagick:coder_PICT_fuzzer: Heap-buffer-overflow in ExpandBuffer" and 20272 "graphicsmagick:coder_PICT_fuzzer: Heap-buffer-overflow in DecodeImage".

• PerlMagick/t/wmf/read.t: Update WMF reference images. Relax test requirements for ski.wmf.

• locale/C.mgk: Correct error message associated with "UnsupportedNumberOfRows". Patch was submitted by Thorsten Alteholz via private email on 2020-02-05.

2020-02-04 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/topol.c: Include magick/magick_endian.h.

2020-02-03 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick, coders, wand: Added copious casts to avoid possible integer overflows in the Microsoft Windows 64-bit build, where sizeof(long) < sizeof(size_t).

2020-01-26 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.h ("PrimitiveInfo"): Change PrimitiveInfo coordinates from type 'unsigned long' to 'size_t'.

2020-01-24 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/gradient.c (GradientImage): Warnings reduction, plus note about incorrect diagonal gradients math.

2020-01-20 Fojtik Jaroslav <JaFojtik@seznam.cz>

• VisualMagickconfigureconfigure.cpp Option /arch:SSE2 is available only for 32 bit build.

2020-01-19 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/pcd.c (DecodeImage): Assure that pcd_length gets initialized with something.

• Magick++/lib/Options.cpp (strokeDashArray): Add needless check for _drawInfo->dash_pattern null in order to make static analysis happy.

• magick/render.c (DestroyPolygonInfo): Make sure to not dereference a null edges pointer.

• coders/pdb.c (WritePDBImage): Make sure that null comment value is not dereferenced.

• coders/vid.c (ReadVIDImage): Make sure that ThrowVIDReaderException does not dereference a null pointer.

• magick/quantize.c (ClassifyImageColors): Fix error handling so a null pointer won't be consumed after a memory allocation failure. Changed the location of some variable declarations and added some comments.

2020-01-18 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/caption.c (ReadCAPTIONImage): Assure that metrics are initialized.

• magick/pixel_cache.c (DestroyThreadViewSet): Check if views pointer is not null before destroying views.

• coders/xpm.c (ReadXPMImage): Properly detect the case where the XPM colormap is not fully initialized.

• coders/pict.c (DecodeImage): Fix heap buffer over-reads. Fixes oss-fuzz issue 20053 "graphicsmagick:coder_PICT_fuzzer: Heap-buffer-overflow in ExpandBuffer" and oss-fuzz issue 20048 "graphicsmagick:coder_PICT_fuzzer: Heap-buffer-overflow in DecodeImage". Both of these oss-fuzz issues appeared due to recent changes since the last release.

• coders/meta.c (WriteMETAImage): Assure that 'iptc_offset' is initialized and valid.

• coders/jpeg.c (ReadJPEGImage): Assure that evaluating the embedded profile length does not suffer from undefined behavior.

2020-01-12 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/render.c (DrawImage): Add more MVG parser validations.

2020-01-11 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/histogram.c (WriteHISTOGRAMImage): Histogram coder was relying on the previously removed '@' file inclusion feature to insert the histogram comment text. Write a PseudoClass MIFF image with RLE compression. Fixes SourceForge issue #622 "Histogram produces incorrect color table attribute ".

• magick/pixel_cache.c (ModifyCache): Re-open the pixel cache if the cache rows/columns do not match the owning image rows/columns.

• magick/transform.c (TransformImage): TransformImage now returns a MagickPassFail return status value rather than void.

• coders/pict.c (ReadPICTImage): Fix some over-strict validations which were preventing some PICT files which were previously read successfully from being accepted. Fix problems which occurred when the clipping rectangle changed the image size. Improve reading embedded JPEG blobs. Now successfully reads all raster PICT files I have available.

2020-01-08 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/pict.c (ReadPICTImage): Be more strict about PICT rectangle by treating rectangle dimensions as if they are a 16-bit signed type and not allowing negative values. Avoid GCC warnings which sprung up similar to "warning: comparison is always false due to limited range of data type".

2020-01-05 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/sfw.c (ReadSFWImage): Restore a DestroyImage() statement which was accidentally deleted by recent edits. Fixes oss-fuzz "Issue 19819 in oss-fuzz: graphicsmagick:coder_SFW_fuzzer: Indirect-leak in AllocateImage".

• coders/png.c (WriteOneJNGImage): Detect when JPEG encoder has failed, and throw exception. Fix image dimension limit validations. Stop discarding exception report. Fixes SourceForge bug #621 "Assertion in WriteBlob at magick/blob.c:4937" which was reported by Suhwan Song.

• coders/pict.c (WritePICTImage): Eliminating small buffer overrun when run-length encoding pixels. Fixes SourceForge bug #620 "heap-buffer-overflow in EncodeImage at coders/pict.c:1114" which was reported by Suhwan Song.

• coders/logo.c (ReadLOGOImage): PATTERN error handling was incomplete. Add appropriate error handling. (ReadLOGOImage): Switch to using ConstituteTextureImage() rather than TextureImage() since it is more appropriate for this purpose. (ReadLOGOImage): Oops! Accidental change of behavior. When size is not supplied, simply return the pattern image.

2020-01-04 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/*.c (ReadFOOImage): Stop image timer just before returning from reader so that reported timings are correct when used in the future.

2020-01-03 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• magick/timer.c (StartTimer): Expose previously existing StartTimer() function. (StopTimer): Expose previously existing StartTimer() function.

• magick/constitute.c (WriteImage): Don't over-write time-stamp when output is to INFO format.

2020-01-03 Fojtik Jaroslav <JaFojtik@seznam.cz>

• VisualMagickconfigureconfigure.exe: Should not depend on mfcr90.dll. It is too bad when end user cannot run this tool because of missing DLL.

• VisualMagickconfigureconfigure.cpp Make speed optimisation as default option.

• VisualMagickconfigureconfigure.vcproj Give different filename to debug build to avoid accidental committing debug build to repository.

2020-01-01 Bob Friesenhahn <bfriesen@simple.dallas.tx.us>

• coders/dpx.c (GenerateDPXTimeStamp): Use reentrant localtime_r() function if it is available.

• magick/log.c (LogMagickEventList): Use reentrant localtime_r() function if it is available.

• coders/cineon.c (GenerateCineonTimeStamp): Use reentrant localtime_r() function if it is available.

• coders/mat.c (WriteMATLABImage): Use reentrant localtime_r() function if it is available.

• coders/pdf.c (WritePDFImage): Use reentrant localtime_r() function if it is available.

• coders/ps.c (WritePSImage): Use reentrant ctime_r() function if it is available.

• coders/ps2.c (WritePS2Image): Use reentrant ctime_r() function if it is available.

• coders/ps3.c (WritePS3Image): Use reentrant ctime_r() function if it is available.

• configure.ac: Test for getpwnam_r().

• magick/utility.c (ExpandFilename): Use reentrant getpwnam_r() function if it is available.

• magick/magick.c (InitializeMagickSignalHandlers): Use the normal termination signal handler for SIGXCPU and SIGXFSZ so that ulimit or setrlimit(2) may be used to apply CPU (RLIMIT_CPU) and output file size (RLIMIT_FSIZE) limits with the normal cleanup, and without dumping core. Note that any output files currently being written may be truncated and files being written by external programs (e.g. Ghostscript) might be left behind unless they are to a temporary file assigned by GraphicsMagick.

• coders/xpm.c (ReadXPMImage): Promote a color-lookup warning to an error.

• coders/xc.c (ReadXCImage): Promote a color-lookup warning to an error.

• coders/null.c (ReadNULLImage): Promote a color-lookup warning to an error.

• Makefile.am: Rotate ChangeLogs for the new year.

• coders/gradient.c (ReadGRADIENTImage): Promote a color-lookup warning to an error.

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