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Changes:
Release 1.2.3 (1 Nov 2013)
--------------------------
* 'oiiotool --pattern checker' (and ImageBufAlgo::checker) was
incorrect when nonzero offsets were used.
* ImageBufAlgo::unsharp_mask() bug when src and dst were different
data formats.
* PSD: fix handling of associated vs unassociated alpha.
* Fixed bug that caused incorrect ImageBuf::copy_pixels() when the two
IB's had different data types.
* Add BOOST_HOME and OCIO_HOME controls from the top-level Makefile wrapper.
* Several OpenEXR 2.0 deep file fixes: only some compression types
supported, write_tiles passed wrong parameters, must suppress some
attribute names.
* DPX - several fixes to properly handle images with nonzero origins.
* Fixes for recent cmake not finding HDF5 properly.
* Many fixes to make OIIO compile with libc++ (clang's new C++ library,
and the default on OSX Mavericks).
* Fix OpenEXR write_scanlines handling of per-channel data types.
* Upgraded PugiXML to a more modern version (necessary for clean compile
with libc++).
Release 1.2.2 (1 Oct 2013)
--------------------------
* New features:
* New oiiotool --siappend : append subimages of top two images on stack.
* Utilities: added Strutil::contains() and icontains().
* Fixes:
* Fixes in handling XMP & IPTC metadata.
* oiiotool --origin and --fullpixels did not correctly propagate their
changes to the output images.
* oiiotool --colorconvert (and the underlying ImageBufAlgo::colorconvert)
could crash if given a color conversion recognized as a no-op.
* DPX output could crash when writing crop images.
* DPX input was not recognizing the proper image offset or originalsize.
* oiiotool --fit wasn't padding correctly or modifying offsets properly.
* Build fixes:
* Fix compiler error on MIPS platform.
* Add FIELD3D_HOME description to 'make help'
* Always use the HDF5 release libraries (for Field3D), not the debug ones.
Release 1.2.1 (5 Aug 2013)
---------------------------
* oiiotool: Fix memory leak when processing frame range.
* Docs improvement: full documentation of ImageBufAlgo.
* oiiotool --help now returns a success error code, not a failure.
* oiiotool: fix incorrect help message about --ociolook.
* oiiotool: Fix typo in "oiio:Colorspace" attribute name that interfered
with correct color space conversion in --colorconvert.
* Many fixes for compiler warnings on various platforms: fmath_test.cpp,
field3dinput.cpp, sysutil.cpp, argparse.cpp, oiiotool.cpp.
* Fixes problems on little-endian architecture with texture3d.cpp.
* Fix compilation problems on architectures with gcc, but no 'pause'
instruction.
* Fix build search path for correctly finding libopenjpeg 1.5.
* Work around bug in older MSVC versions wherein Filesystem::open needed
to explicitly seek to the beginning of a file.
* Build fixes for FreeBSD.
* Fix testsuite/oiiotool on Windows -- windows shell doesn't expand wildcards.
Release 1.2 (8 July 2013)
-------------------------
Major new features and improvements:
* New oiiotool commands:
--swap Exchanges the top two items on the image stack.
--fit Resize image to fit into a given resolution (keeping aspect).
--ch Select/cull/reorder/add channels within an image.
--chappend Merge two images by appending their color channels.
--chnames Rename some or all of the color channels in an image.
--zover Depth compositing
--cadd Add constant per-channel values to all pixels
--cmul Multiply an imge by a scalar or per-channel constant.
--fillholes Smoothly interpolate for hole filling.
--resample Similar to --resize, but just uses closest pixel lookup.
--clamp Clamp pixel values
--rangeexpand Expand range for certain HDR processing
--rangecompress Compress range for certain HDR processing
--unpremult Divide colors by alpha (un-premultiply).
--premult Multiply colors by alpha.
--kernel Make a convolution kernel using a filter name.
--convolve Convolve two images.
--blur Blur an image.
--unsharp Sharpen an image using an unsharp mask.
--paste Paste one image on another.
--mosaic Create a rectilinear image mosaic.
--transpose Transpose an image (flip along the diagonal axis)
--chsum Sum all channels in each pixel
--cshift Circular shift an image pixels
--fft --ifft Forward and inverse Fourier transform
--colorcount Counts how many pixels are one of a list of colors.
--rangecheck Counts how many pixels fall outside the given range.
--ociolook Apply OpenColorIO "looks"
--autotrim Shrinks pixel data window upon output to trim black edges.
* oiiotool can loop over entire numeric frame ranges by specifying
wildcard filenames such as "foo.#.tif" or "bar.1-10#.exr".
* oiiotool --frames and --framepadding give more explicit control over
frame range wildcards.
* Significant performance improvements when reading and writing images
using the ImageBuf::read and ImageCache::get_pixels interfaces, and in
some cases also when using regular ImageInput. This also translates
to improved performance and memory use for oiiotool and maketx.
* At least doubled the performance of maketx for large images when run
on multi-core machines.
* Significant performance improvements when using ImageBuf::Iterator
or ConstIterator to traverse the pixels in an ImageBuf, and the iterators
now support "wrap" modes (black, clamp, periodic, mirror).
* maketx --hicomp does "highlight compensation" by compressing the
HDR value range prior to inter-MIP resizes, then re-expanding the range.
* Field3D writer (it could read f3d files before, but not write them).
* idiff can now compare that are not the same size (treating pixels
beyond the pixel data window is being 0 valued).
* maketx --lightprobe turns a "lightprobe" iamge into a latlong environment
map.
* Significant improvements and fixes to EXIF, IPTC, and XMP metadata
reading and writing.
* Significant thread scalability improvements to TextureSystem and
ImageCache.
* Huge overhaul of functionality, style, and performance of the
entire ImageBufAlgo set of functions (see the "Public API changes"
section below, and the imagebufalgo.h file for details).
Public API changes:
* ImageOutput semantics change: If the spec passed to open() has
spec.format set fo UNKNOWN, then select a default data format for the
output file that is "most likely to be able to be read" and/or "most
typical for files of that format in the wild." Also,
ImageOutput::open() will never fail because a requested data format is
unavailable; if the requested format is not supported, a reasonable
alternate will always be chosen.
* ImageBuf has been changed to a "PIMPL" idiom, wherein all the
internals are no longer exposed in the public API. This allows us to
change ImageBuf internals in the future without breaking API or link
compatibility (and thus giving us more freedom to backport important
improvements to prior releases).
* Overhaul of ImageBufAlgo functions: they all take an ROI parameter;
use the DISPATCH macros to make them work with all pixel data types
where practical (previously, many supported float only); use Iterator
rather than getpixel/setpixel, leading to huge speed improvements;
multithread when operating on enough pixels, leading to huge speed
improvements; work on 3D (volume) images where applicable; always
gracefully handle uninitialized dest image or undefined ROI.
* New ImageBufAlgo functions: channels(), channel_append(), mul(),
paste(), zover(), add() and mul() varieties that that add/multiply a
constant amount to all pixels, fillholes_pp(), resample(), clamp(),
rangecompress(), rangeexpand(), make_kernel(), unsharp_mask(),
transpose(), channel_sum(), circular_shift(), fft(), ifft(),
color_count(), color_range_check(), nonzero_region().
[look in imagebufalgo.h for documentation.]
* ImageBufAlgo::make_texture() allows you to do the same thing that
maketx does, but from inside an application and without launching a
shell invocation of maketx. Two varieties exist: one that takes a
filename and reads from disk, another that takes an ImageBuf already
in memory.
* ImageBuf Iterator/ConstIterator now take "wrap" mode parameters that
allow out-of-range iterators to be able to retrieve valid data. Supported
wrap modes include black, clamp, periodic, and mirror. This simplifies
a lot of algorithms using IB::Iterator, they can now be written to
rely on wrap behavior rather than being cluttered with checks for
"if (it.exits())" clauses.
* ImageBufAlgo::computePixelHashSHA1 has been refactored to take ROI,
a block size, and thread count, and thus can be parallelized with threads.
The block size means that rather than computing a single SHA-1 for all
the pixels, it computes separate (parallel) SHA-1 for each group of
blocksize scanlines, then returns the SHA-1 of all the individual SHA-1
hashed blocks. This is just as strong a hash as before, thought the value
is different than doing the whole thing at once, but by breaking it into
blocks the computation can be multithreaded.
* ImageBuf::swap() makes it easy to swap two ImageBuf's.
* ImageSpec::get_channelformats is now const (and always should have been).
Fixes, minor enhancements, and performance improvements:
* TextureSystem improvements:
* Make sure "black" wrap wins out over "fill" value when they conflict
(looking up an out-of-range channel beyond the pixel data window).
* "mirror" wrap mode was slightly incorrect and has been fixed.
* oiiotool improvements:
* oiiotool -v breaks down timing by individual function.
* oiiotool has been sped up by forcing read of the whole image up front
for reasonably-sized files (instead of relying on ImageCache).
* oiiotool does not write output images if fatal errors have occurred.
* oiiotool --diff: Better error handling, better error printing, and
now it can compare images with differing data windows or channel
numbers ("missing" channels or pixels are presumed to be 0 for the
purposes of comparing).
* oiiotool --resize (and --fit): properly handle the case of resizing
to the same size as the original image.
* oiiotool -d CHAN=TYPE can set the output for just one channel.
* ImageBufAlgo improvements:
* Internal overhaul of IBA::resize to greatly speed it up.
* Improve IBA::resize to handle the image edge better -- instead of
clamping, just don't consider nonexistant pixels.
* More careful selection of filter when resizing (IBA::resize, oiiotool
--resize and --fit, and maketx).
* Fix IBA::paste() error when the foreground image runs off the end of
the background image.
* Bug fix when computing SHA-1 hash of 0-sized images.
* Image format support improvements:
* Bug fix where some format readers (PNM, SGI, and IFF) would leave the
file handle opened if the ImageInput was destroyed without calling
close() first. Now we guarantee that destroying the II always causes
the file to close().
* DPX: output allocation bug fix; properly set pixel aspect ratio for
DPX write.
* IFF: bug fix for endian swap for IFF file input.
* JPEG2000: fix warnings, make sure event manager transfer object
remains valid.
* OpenEXR: when reading, was botching the ordering of per-channel data
formats.
* SGI write: bug fix for the case of 15 bpp RLE encoding, was
double-swapping bytes.
* Targa: more robust check for presence of alpha channels; bug fix where
R and B channels were reversed for certain kinds of palette images.
* TIFF: Store the orientation flag properly when outputting a TIFF file.
* maketx improvements:
* maketx --chnames allows you to rename the channels when you create a
texture.
* maketx bug fixes: incorrect weighting when resizing MIP levels for
latlong environment map images that could make visible artifacts
on some intermediate MIP levels.
* encode_exif() didn't copy the right number of bytes.
* Python bindings: ImageSpec extra_attribs now properly responds to
iterator calls.
* Fix bug in sRGB -> linear conversion.
* iv: make pixelview display coordinates & color even when outside the
data window.
Build/test system improvements:
* Many fixes to improve builds and eliminate warnings on Windows and MinGW.
* Fix missing InterlockedExchangeAdd64 for Windows XP.
* New make/cmake boags: OIIO_BUILD_TOOLS=0 will exclude building of the
command line tools (just build libraries), OIIO_BUILD_TESTS=0 will
exclude building of unit test binaries.
* Improved matching of testsuite reference images on different platforms.
* Lots of fixes to compiler warnings on newer gcc and clang releases.
* Unit tests for Timer class.
* libOpenImageio/imagespeed_test benchmarks various methods of reading
and writing files and iterating image pixels (to help us know what to
optimize).
* If OpenSSL is available at build time, OIIO will use its SHA-1
implementation instead of our own (theirs is faster). We still fall
back on ours if OpenSSL is not available or when OIIO is built with
USE_OPENSSL=0.
* Allow default the shared library suffix to be overridden with the
CMake variable OVERRIDE_SHARED_LIBRARY_SUFFIX.
* Eliminated all uses of the custom DEBUG symbol, and instead use the
more standard idiom "#ifndef NDEBUG".
* Compatibility fixes for Python3.
* MSVC 2008: Prevent a redefinition error when using boost::shared_ptr.
* Fixes for compatibility with libtiff 4.0.
* Fixes for MSVC debug mode having out-of-bound exceptions.
* Fixes for libjpeg 9.x.
* Compile to treat warnings as errors (you can disable this with
STOP_ON_WARNING=0).
* New filter: "sharp-gaussian".
* Fix various Windows build errors.
* Improvements to the build when finding IlmBase/OpenEXR.
* Various fixes to compile on ARM architecture.
* Fixes to compile on ESA/390 mainframe (!).
* testtex --threadtimes, --trials, --iters, --nodup, --wedge. These
are helpful in using testtext to benchmark the texture system.
* Improvements to make more tests work properly on Windows.
Developer goodies:
* Improved ASSERT and DASSERT macros to not generate warning for certain
debug compiles; key their debug behavior by the absence of the standard
NDEBUG idiom rather than presence of a custom DEBUG symbol; rename the
message variants ASSERT_MSG and DASSERT_MSG.
* Change the default for Sysutil::memory_used to report resident memory
rather than virtual process size.
* Multithread/parallel version of utility function convert_image().
* imagebufalgo.h improvements and expansion of the various DISPATCH_*
macros.
* New Filesystem utilities: parent_path(), get_directory_entries().
* New Strutil utilities: extract_from_list_string
* spinlock tweaks make it faster than TBB's spin locks!
* By default, we no longer build or use TBB (it's considered deprecated,
but in 1.2 can still be turned on with USE_TBB=1).
* In fmath.h, added definitions for safe_inversesqrt, safelog, safe_log2,
safe_log10, safe_logb.
* In typedesc.h, added TypeDesc::tostring() function.
* unordered_map_concurrent.h contains a template for a thread-safe
unordered_map that is very efficient even for large number of threads
simultaneously accessing it.
* Documentation: Finally, a chapter in the PDF docs that fully describes
the ImageBuf class.
Release 1.1.13 (24 Jun 2013)
----------------------------
* Texture: make sure wrap mode "black" wins over "fill" value when they
conflict.
Release 1.1.12 (20 Jun 2013)
----------------------------
* Fix oiiotool '#' wildcard, was broken on Windows.
* Fix an overflow problem that plagued 'maketx' when running on input
larger than 32k x 32k (among other possible failures).
Release 1.1.11 (29 May 2013)
----------------------------
* IFF input: bug in endian swap of 16 bit IFF files.
* oiiotool: fix a minor bug where tiled files were output inappropriately.
(Had been patched in master some time ago.)
* fmath.h additions: safe_inversesqrt, safe_log, safe_log2, safe_log10,
safe_logb. These are versions that clamp their inputs so that they
can't throw exceptions or return Inf or NaN.
* Fix to not incorrectly print ImageCache stats for certain broken files.
Release 1.1.10 (13 Apr 2013)
----------------------------
* IBA::fillholes() and oiiotool --fillholes can smoothly fill in alpha
holes with nearby colors. Great for extrapolating the empty areas of
texture atlas images so that filtered texture lookups pull in a plausible
color at part edges.
* IBA::clamp and oiiotool --clamp clamp pixel values to a scalar or
per-channel min and/or max, or clamp alpha to [0,1].
* IBA::rangecompress()/rangeexpand(), and oiiotool --rangecompress /
--rangeexpand compress the excess >1 values of HDR images to a log
scale (leaving the <= 1 part linear), and re-expand to the usual
linear scale. This is very helpful to reduce ringing artifacts that
can happen when an HDR image is resized with a good filter with negative
lobes (such as lanczos3), by doing a range compression, then the resize,
then range expansion. It's not mathematically correct and loses energy,
but it often makes a much more pleasing result.
* maketx --hicomp does highlight compression -- automatically doing a
range compress before each high-quality resize step, and then a
range expansion and clamp-to-zero (squash negative pixels) after
each resize.
* DPX - when writing DPX files, properly set the pixel aspect ratio.
Release 1.1.9 (2 Apr 2013)
--------------------------
* IBA::resize and oiiotool --resize/--fit: Bug fixes to resize filter
size selection fix artifacts wherein extreme zooms could end up with
black stripes in places where the filters fell entirely between samples.
* oiiotool --fit: fix subtle bugs with aspect ratio preservation for
images with differing data and display windows; and allow "filter=..."
to override the default filter used for fit.
* Resize improvement: fix potential artifacts at the image edges resulting
from odd clamping behavior.
* Even more frame range wildcard flexibility with oiiotool --frames and
--framepadding options.
* oiiotool --resize and --fit (and the underlying IBA::resize()) have been
sped up significantly and are now also multithreaded.
Release 1.1.8 (15 Mar 2013)
---------------------------
* oiiotool --chappend (and ImageBufAlgo::channel_append() underneath) allow
you to take two files and concatenate their color channels.
* oiiotool --chnames allows you to rename some or all of a file's color
channels.
* oiiotool can loop over entire frame ranges by specifying wildcard
filenames such as "foo.#.tif" or "bar.1-10#.exr".
* Cmake: OVERRIDE_SHARED_LIBRARY_SUFFIX allows the shared library suffix
to be overridden (e.g., if you need to force .so names on OSX rather
than the usual default of .dylib).
Release 1.1.7 (21 Feb 2013)
---------------------------
* Back out dangerous change to thread.h that was in 1.1.6, which could
cause performance problems.
* Compile fix for WIN32 in strutil.cpp
* Compile fix for Windows XP - add implementation of InterlockedExchangeAdd64
Release 1.1.6 (11 Feb 2013)
---------------------------
* Fix bug that could generate NaNs or other bad values near the poles of
very blurry environment lookups specifically from OpenEXR latlong env maps.
* Fix bug in oiiotool --crop where it could mis-parse the geometric parameter.
* Fix bug in ImageCache::invalidate() where it did not properly delete the
fingerprint of an invalidated file.
* Cleanup and fixes in the oiiotool command line help messages.
* New function ImageBufAlgo::paste() copies a region from one IB to another.
* oiiotool --fit resizes an image to fit into a given resolution (keeping the
original aspect ratio and padding with black if needed).
* ImageBufAlgo::channels() and "oiiotool --ch" have been extended to allow
new channels (specified to be filled with numeric constants) to also be
named.
* New function ImageBufAlgo::mul() and "oiiotool --cmul" let you multiply
an image by a scalar constant (or per-channel constant).
* Important maketx bug fix: when creating latlong environment maps as
OpenEXR files, it was adding energy near the poles, making low-res
MIP levels too bright near the poles.
* Fix to "oiiotool --text" and "oiiotool --fill" -- both were
incorrectly making the base image black rather than drawing overtop of
the previous image.
* Fix FreeBSD compile when not using TBB.
* New oiiotool --swap exchanges the top two items on the image stack.
Release 1.1.5 (29 Jan 2013)
---------------------------
* Bug fix in ImageBufAlgo::parallel_image utility template -- care when
not enough work chunks to dole out to all the threads (was previously
sending work to threads with nonsensical ROI's, now we just stop when
all the regions have been doled out).
* Additional optional argument to IBA::zover that, when nonzero, will
treat z=0 pixels as infinitely far away, not super close. You can turn
this on from oiiotool with: oiiotool --zover:zeroisinf=1 ...
Release 1.1.4 (27 Jan 2013)
---------------------------
* ImageBufAlgo::make_texture() allows you to do the same thing that
maketx does, but from inside an application and without launching a
shell invocation of maketx.
* oiiotool now recognizes --metamatch and --nometamatch arguments which
cause metadata names matching (or only info NOT matching) the given
regular expression to be printed with --info.
* oiiotool --zover does z (depth) composites (it's like a regular "over",
but uses the z depth at each pixel to determine which of the two images
is the foreground and which is the background).
* ImageBufAlgo::zover() performs z compositing (same as oiiotool --zover).
* ImageBufAlgo::fixNonFinite didn't work properly with 'half' image buffers.
* Performance improvements when reading and writing images.
* Fix error when writing tiled 'float' TIFF images, corrupted output.
(Could easily happen when using 'maketx' to convert float images into
TIFF textures.)
* Eliminate warnings when compiling with Clang 3.2.
* New CMake variable "USE_EXTERNAL_TBB" can optionally be set to force use
of an external TBB library rather than the embedded one.
* Additional testsuite tests (doesn't affect users, but makes bugs easier
to catch).
* Fix build problem with SHA1.cpp on some platforms.
Release 1.1.3 (9 Jan 2013)
---------------------------
* Build fix: incorrectly named OpenEXR 2.x files.
* Bug fix in oiiotool --croptofull on OSX
* Build fixes for MinGW on Windows.
* maketx --fullpixels option ignores any origin or display window in the
source image, pretending the pixel data is the entire 0-1 image range
starting at the origin (useful when the source image is created by an
application that incorrectly writes it out as if it were a crop window).
* maketx no longer will clobber existing ImageDescription metadata
when it adds SHA-1 hash or other info as it creates the texture.
* Many additional Exif and IPTC tags are correctly recognized.
* maketx and oiiotool recognize and take advantage of IPTC:ImageHistory
metadata.
Release 1.1.2 (5 Dec 2012)
--------------------------
* maketx fixes -- was botching creation of textures from source images that
were crop windows (pixel window smaller than display window).
* Minor bug fix to Timer when repeatedly starting and restopping (Apple only).
* Bug fix in ustring:find_last_not_of.
Release 1.1.1 (16 Nov 2012)
---------------------------
* Altered the ImageInput::read_scanlines, read_tiles, read_native_scanlines,
read_native_tiles, read_native_deep_scanlines, read_native_deep_tiles,
and the channel-subset version of ImageSpec::pixel_bytes, so that
instead of specifying channel subsets as (firstchan, nchans), they are
specified as [chbegin, chend), to match how spatial extents are done,
as well as how channel ranges already were specified in ROI and
ImageBuf. We hate changing API meanings, but we really think this is
better and more consistent. Note that the two common uses of channel
subsets were firstchan=0,nchans=nchannels (select all channels) and
firstchan=foo,nchans=1, and we have rigged it so that [chbegin,chend)
returns the same channels in both of these cases (in the latter case,
because we retrieve a minimum of 1 channel), so we believe this is
unlikely to break working code in the vast majority of cases.
* OpenEXR: support reading and writing V2f attributes.
* OIIO::getattribute("extension_list") returns a list of all formats
supported, and all extensions for each format, in the form:
"formatA:ext1,ext2,ext3;formatB:ext4,ext5;..."
* The new ImageCache per-file stats that list numbers of tiles read per
MIPmap level have been reformatted slightly, and now print only for
files that are actually MIP-mapped.
* New ImageCache::get_pixels() variety that can retrieve a subset of
channels.
* Substantial speedup of ImageCache::get_pixels, used to be about 50%
more expensive to call IC::get_pixels compared to a direct call to
ImageInput::read_image; now is only about 15% more expensive to use
the cache.
Release 1.1 (9 Nov 2012)
------------------------
Major new features and improvements:
* Support for reading and writing "deep" images (including OpenEXR 2.0).
* Big ImageCache/TextureSystem improvements:
- Improved accuracy of anisotropic texture filtering, especially when
combined with "blur."
- Improve performance in cases with high numbers of threads using the
TS simultaneously (mostly due to use of reader-writer locks on the
tile cache rather than unique locks).
* New ImageBufAlgo functions:
fromIplImage() : converts/copies an OpenCV image to an ImageBuf.
capture_image() : captures from a camera device (only if OpenCV is found)
over() : Porter/Duff "over" compositing operation
render_text() : render text into an image
histogram() : compute value histogram information for an image
histogram_draw() : compute an image containing a graph of the histogram
of another image
channels() : select, shuffle, truncate, or extend channels of an image.
* New oiiotool commands:
--capture : captures from a camera device (only if OpenCV is found)
--pattern constant : creates a constant-color image
--over : Porter/Duff "over" compositing operation
--text : render text into an image.
--histogram : computes an image containing a graph of the histogram of
the input image.
--fill : fills a region with a solid color
--ch : select, shuffle, truncate, or extend channels
API changes:
* A new static ImageInput::open(filename [,config]) combines the old
create-and-open idiom into a single call, which is also much more
efficient because it won't needlessly open and close the file multiple
times. This is now the preferred method for reading a file, though
the old-style create() and open() still work as always.
* Deep image support: ImageInput adds read_native_deep_scanlines,
read_native_deep_tiles, read_native_deep_image, and ImageOutput adds
write_deep_scanlines, write_deep_tiles, write_deep_image, as well as a
supports("deepdata") query. Also, a 'deep' field has been added to
ImageSpec, and some deep data access functions have been added to
ImageBuf.
* Altered the ImageInput::read_scanlines, read_tiles, read_native_scanlines,
read_native_tiles, read_native_deep_scanlines, read_native_deep_tiles
so that instead of specifying channel subsets as (firstchan, nchans),
they are specified as [chbegin, chend), to match how spatial extents
are done, as well as how channel ranges already were specified in ROI
and ImageBuf. We hate changing API meanings, but we really think this
is better and more consistent. Note that the two common uses of channel
subsets were firstchan=0,nchans=nchannels (select all channels) and
firstchan=foo,nchans=1, and we have rigged it so that [chbegin,chend)
returns the same channels in both of these cases (in the latter case,
because we retrieve a minimum of 1 channel), so we believe this is
unlikely to break working code in the vast majority of cases.
* ImageInput plugins now may supply a valid_file(filename) method which
detects whether a given file is in the right format, less expensively
than doing a full open() and checking for errors. (It's probably the same
cost as before when the file is not the right time, but when it is, it's
less expensive because it can stop as soon as it knows it's the right
type, without needing to do a full header read and ImageSpec setup.)
* New ImageCache::get_pixels() method that can retrieve a subset of
channels.
* Removed various error_message() functions that had been deprecated for
a long time (in favor of newer getmessage() functions).
* Define a namespace alias 'OIIO' that gets you past all the custom
namespacesin a convenient way.
* TextureOpt now contains a 'subimagename' field that allows subimages
to be addressed by name as well as by index (only for multi-image textures,
of course).
* ImageBuf improvements:
- A new constructor allows an ImageBuf to "wrap" an existing buffer
memory owned by the calling application without allocating/copying.
- Renamed the old ImageBuf::copy_pixels -> get_pixels, and it now
works for 3D (volumetric) buffers.
- New ImageBuf::copy(), and eliminated operator= which was confusing.
- New ImageBuf methods: reres(), copy_metadata(), copy_pixels(),
get_pixel_channels().
- ImageBuf::specmod() allows writable access to the ImageSpec (caution!).
- Better error reporting mechanism.
- get_pixels and get_pixel_channels take optional strides.
* ImageBufAlgo changes:
- Many ImageBufAlgo functions now take a 'ROI' that restricts the
operation to a particular range of pixels within the image (usually
defaulting to the whole image), and for some operations a range of
channels.
- zero() and fill() take ROI arguments.
- ImageBufAlgo::CompareResults struct changed the failure and warning
counts to imagesize_t so they can't overflow int for large images.
* OIIO::getattribute("format_list") now can retrieve the comma-separated
list of all known image file formats.
* OIIO::getattribute("extension_list") returns a list of all formats
supported, and all extensions for each format, in the form:
"formatA:ext1,ext2,ext3;formatB:ext4,ext5;..."
Fixes, minor enhancements, and performance improvements:
* ImageCache/TextureSystem:
- Anisotropic texture lookups are more robust when the derivatives are tiny.
- Attribute "deduplicate" controls whether the identical-image
deduplication is enabled (on by default).
- Attribute "substitute_image" lets you force all texture references to a
single image (helpful for debugging).
- Texture files are no longer limited to having tile sizes that are
powers of 2.
- Much faster TIFF texture access (by speeding up switching of MIPmap levels).
- More graceful handling of the inability to free handles or tiles
under extreme conditions. Rather than assert when we can't free
enough to stay within limits, just issue an error and allow the
limits to be exceeded (hopefully only by a little, and temporarily).
- Detailed per-file stats now track the number of tile reads per
MIPmap level.
- Attribute "unassociatedalpha" (when nonzero) requests that
IC images not convert unassociated alpha image to associated alpha.
- Substantial speedup of ImageCache::get_pixels, used to be about 50%
more expensive to call IC::get_pixels compared to a direct call to
ImageInput::read_image; now is only about 15% more expensive to use
the cache.
* iconvert handles the int32 and uint32 cases.
* Bug fix in to_native_rectangle, which could lead to errors in certain
data format conversions.
* iv improvements:
- better behavior after closing the last image of the sequence.
- file load/save dialogs can filter to show just certain image file types.
- remember last open dialog directory
- "About" dialog has a link to the OIIO home page
* Improve ::create to more robustly handle files whose extensions don't
match their actual formats.
* OpenImageIO::geterror() is now thread-specific, so separate threads will
no longer clobber each others' error messages.
* OpenEXR: support for building with OpenEXR 2.x, including use of
multi-part EXR and "deep" data.
* Fix reading bugs in DPX and Cineon.
* DPX: fix endianness problem for 15 bit DPX output.
* PNG: fix handling of gamma for sRGB images.
* oiiotool fixes: print MIP messages correctly (it was only printing for
the first MIP level); make sure stray "oiio:BitsPerSample" in an input
file doesn't mess up the -d flags.
* Field3D fixes: properly catch exceptions thrown by the Field3D open();
conform metadata to Field3D conventions; multi-layer f3d files will
present as a multi-image file with the "oiio:subimagename" giving a
unique name for each layer subimage;
* OpenEXR: suppress format-specific metadata from other formats.
* OpenEXR: support reading and writing V2f attributes.
* Targa: fix several bugs that were preventing certain metadata from being
written properly.
* TIFF: recognize the SAMPLEFORMAT_IEEEFP/bitspersample=16 as an image
composed of "half" pixels; enable PREDICTOR_FLOATINGPOINT to give slightly
better compression of float images.
* Handle UTF-8 paths properly on Windows.
* Removed the obsolete "iprocess" utility.
* Fix allocation and stride bugs when dealing with images having different data
formats per channel, and tiled images with partially filled border tiles.
* Field3D: Bug fix when reading vector f3d files.
* Significant performance improvements of our atomics and spin locks when
compiling with USE_TBB=0.
* Fix quantize() to properly round rather than truncate.
* ImageBufAlgo functions now by convention will save error messages into
the error state of their output ImageBuf parameter.
* Improve I/O error checking -- many file reads/writes did not previously
have their result status checked.
* Fixed missing OpenEXR open() error message.
* Clean up error reporting in iconvert.
* Fixes to handle Windows utf8 filenames properly.
* ImageBufAlgo::compare() gives a sensible error (rather than an assertion)
if the images being compared are not float.
* maketx:
- Better error messages for a variety of things that could go wrong when
reading or writing image files.
- Fixes for bug preventing certain ImageCache efficiencies.
- new option --ignore-unassoc leaves unassociated alpha data as it is
(no auto-conversion to associated alpha) and/or ignores the tags for
an input file that is associated but incorrectly tagged as
unassociated alpha.
- Option --monochrome-detect was buggy for images with alpha.
- Option --constant-color-detect didn't do anything; now it works.
- New option: --compression allows you to override the default compresion.
* oiiotool & info: the --hash command had a bug wherein when applied to
images there were MIP-mapped, would hash the lowest-res MIP level rather
than the highest-res. This could result in two different images, if
they happened to have the same average color, to incorrectly report
the same SHA-1 hash. Note that this did NOT affect non-MIPmapped images,
nor did it affect the SHA-1 hashing that occurred in maketx to allow
the TextureSystem to detect duplicate textures.
Build/test system improvements:
* Various Windows build fixes, including fixes for Windows 7, and
improvements to running the testsuite on Windows.
* Testsuite additions and improvements: png fmath_test
* Compilation fixes on FreeBSD.
* Compilation fixes on GNU Hurd platform.
* Compilation and warning fixes for Clang 3.1.
* Add FIELD3D_HOME build variable to allow explicit path to Field3D
implementation.
* Remove support for Boost < 1.40.
* Improved unit tests for atomics, spin locks, and rw locks.
* Avoid generating iv man pages when USE_QT=0
* New testtex options: --aniso, --stblur
* CMake option 'EXTRA_CPP_DEFINITIONS' lets custom builds inject
site-specific compiler flags.
* Make/cmake option: HIDE_SYMBOLS=1 will try to restrict symbol visibility
so that only symbols intended to be part of the public APIs will be
visible in the library when linked.
* The old DLLPUBLIC and LLEXPORT macros, which could clash with other
packages, have been renamed to OIIO_API and OIIO_EXPORT.
* Greatly reduced output when building with cmake; by default, most
non-error status messages only are printed when VERBOSE=1 compilation
is requested.
Developer goodies:
* Strutil new utilities: iequals, istarts_with, iends_with, to_lower,
to_upper, strip, join.
* Use Chris Foster's 'tinyformat' for type-safe printf-like formatting,
and this now forms the basis of Strutil::format, ustring::format, and
many of the classes' error() methods.
* TypeDesc::equivalent() tests for type equality but allows triples with
different' vector semantics to match.
* In timer.h, a new time_trial() template that makes multiple trial
benchmarks easy.
* Macros for memory and cache alignment (in sysutil.h).
* Extend Filesystem::searchpath_find() to be able to search recursively.
* Strutil::strip() strips whitespace (or other specified character sets) from
the beginning or ending of strings.
* Change threads.h to set USE_TBB=0 if undefined as a compiler flag; this
makes it easier to use threads.h in other applications without worrying
about TBB at all.
* Windows utf8 filename utilities path_to_windows_native and
path_from_windows_native.
Release 1.0.10 (5 Nov 2012)
---------------------------
* ImageCache: more graceful handling of the inability to free handles or
tiles under extreme conditions. Rather than assert when we can't free
enough to stay within limits, just issue an error and allow the limits
to be exceeded (hopefully only by a little, and temporarily).
* ImageCache: Detailed per-file stats now track the number of tile reads
per MIPmap level.
* ImageCache attribute "unassociatedalpha" (when nonzero) requests that
IC images not convert unassociated alpha image to associated alpha.
* maketx option --ignore-unassoc leaves unassociated alpha data as it is
(no auto-conversion to associated alpha) and/or ignores the tags for
an input file that is associated but incorrectly tagged as unassociated
alpha.
* oiiotool & info: the --hash command had a bug wherein when applied to
images there were MIP-mapped, would hash the lowest-res MIP level rather
than the highest-res. This could result in two different images, if
they happened to have the same average color, to incorrectly report
the same SHA-1 hash. Note that this did NOT affect non-MIPmapped images,
nor did it affect the SHA-1 hashing that occurred in maketx to allow
the TextureSystem to detect duplicate textures.
Release 1.0.9 (4 Sep 2012)
----------------------------
* Improve error messages when trying to open an OpenEXR image that doesn't
exist or is not a valid OpenEXR file.
* Make the TextureSystem work properly with MIPmapped images whose tile
size is not a power of 2 (mostly back-ported from master, but with
additional fixes).
Release 1.0.8 (17 July 2012)
----------------------------
* Fix quantization/truncation bug that sometimes left tiny alpha holes in
8 bit images (making some alpha value that should be 255, instead 254).
* TextureSystem: fix fill_channels for monochrome+alpha images to properly
expand to "RRRA."
Release 1.0.7 (8 July 2012)
---------------------------
* Bug fix when reading vector Field3D files.
* Fix input of tiled images with per-channel formats.
* Add testsuite/nonwhole-tiles and testsuite/perchannel.
* Bug fix when reading binary PNM files.
Release 1.0.6 (12 Jun 2012)
---------------------------
* Fix allocation and stride bugs in that could overrun a buffer when
reading tiled images whose resolution was not a whole number of tiles.
* Fix stride bugs when reading scanline images with differing data types
per channel.
* Fixes for FreeBSD compilation.
Release 1.0.5 (3 Jun 2012)
--------------------------
* Various fixes for FreeBSD/kFreeBSD systems.
* Various fixes to compile with Clang 3.1 without warnings.
* Fixed some DPX and Cineon bugs related to channel names.
* Fixed some mangled text in the PDF documentation.
* Developer goodie: TypeDesc::equivalent() tests two TypeDesc's for
equality, but allows 'triples' with differing vector semantics to match.
Release 1.0.4 (2 May 2012)
--------------------------
* DPX fixes for 12 bit DPX and packing methods.
* Cineon fixes: remove buggy 32 and 64 bit output, which wasn't needed;
fix for 10 bit -> 16 bit promotion.
* bmp fix: wasn't setting oiio:BitsPerSample correctly.
* oiiotool fixes: improved argument help and add man page generation;
print data format info correctly for non-byte bit depths; better
inference of output tile size and data format from the inputs (when
not explicitly requested); --resize n% was broken; print data format
info correctly for non-byte bit depths.
* iinfo fixes: make --stats print correctly; print data format info
correctly for non-byte bit depths.
* Fix roundoff error when converting from float buffers to int image files.
* More precise filter normalization in ImageBufAlgo::resize (and therefore
oiiotool --resize).
Release 1.0.3 (16 Apr 2012)
---------------------------
* Fix reading bugs in DPX and Cineon.
* iconvert handles the int32 and uint32 cases.
* Bug fix in to_native_rectangle, which could lead to errors in certain
data format conversions.
* Various Windows build fixes, including fixes for Windows 7.
* Compilation fixes on FreeBSD.
Release 1.0.2 (19 Mar 2012)
----------------------------
* Fixed TARGA reader bug where for 16-bpp, 4-channel images, we weren't
reading the alpha properly.
* Fix ill-formed default output names for maketx (and in the process,
add Filesystem::replace_extension utility).
* Threading performance improvement in the texture system as a result of
wrapping various internal "iequals" calls to pass a static locale
rather than relying on their default behavior that would use a mutex
underneath to access a global locale.
Release 1.0.1 (13 Mar 2012, compared to 1.0.0)
----------------------------------------------
Fixes, minor enhancements, and performance improvements:
* Improvements in anisotropic texture filtering quality.
* oiiotool --hash prints the SHA-1 hash of each input image.
* oiiotool: properly print error message and exit when an input file
cannot be opened.
* Changed the default behavior of idiff and "oiiotool --diff" to print
the pixel difference report only for failures (not for successful
matches), unless in verbose (-v) mode.
Developer goodies:
* dassert.h: New ASSERTMSG and DASSERTMSG allow even more flexible
assertion messages with full printf argument generality.
* Windows compilation fixes.
* Major testsuite overhaul: All tests are copied and run in the
build/ARCH/testsuite directory, no longer leaving any clutter in the
"source" testsuite area. The testing scripts have been cleaned up
and greatly simplified. An individual test can be run using "make
test TEST=name" (also works with regular expressions). The usual
"make test" will exclude tests that are expected to be broken (such
as tests for portions of the system that were not built because their
required libraries were not found), but "make testall" will run all
tests including nominally "broken" ones.
Release 1.0 (25 Feb 2012, compared to 0.10.5)
---------------------------------------------
Major new features and improvements:
* New ImageInput & ImageOutput methods that can efficiently read/write
multiple scanlines or tiles at a time.
* New ImageInput methods that can read a subset of channels from an image.
* WebP format reader/writer.
* PSD (Adobe Photoshop) format reader.
* RLA (Wavefront) format reader/writer.
* Cineon support is re-enabled after various bug fixes.
* New utility: oiiotool. This is still a work in progress, but largely
subsumes the functionality of iprocess, iinfo, iconvert, idiff.
* Use OpenColorIO (www.opencolorio.org) for color space conversion, if
detected at build time and a valid OCIO configuration is found at runtime.
Color conversion commands have been added to oiiotool and maketx.
API changes:
* New ImageInput & ImageOutput methods that can efficiently read/write
multiple scanlines or tiles at a time: read_scanlines, read_tiles,
write_scanlines, write_tiles.
* New ImageInput methods that can read a subset of channels from an image.
* Change the last couple functions that took min/max pixel range
specifications to conform to our usual [begin,end) convention --
write_rectangle and to_native_rectangle.
* exif_encode, exif_decode now available as general utilities (previously
were private to the JPEG plugin).
* New ImageOutput::supports() queries: "displaywindow" queries whether the
file format is able to handle differing display ("full") and pixel data
windows, "negativeorigin" queries whether data origin or full/display
origin may be negative.
* TextureSystem and ImageCache now accept attribute "options", that is a
comma-separated list of name=value setings (e.g.
"max_memory_MB=256,max_files=1000"). Also, upon startup, the environment
variables OPENIMAGEIO_TEXTURE_OPTIONS and OPENIMAGEIO_IMAGECACHE_OPTIONS
are parsed for these startup values.
* TextureSystem/ImageCache: add a separate "plugin_searchpath" attribute
separate from the "searchpath" for images.
Fixes, minor enhancements, and performance improvements:
* ImageBufAlgo new algorithms: compare, compare_Yee, isConstantChannel,
fixNonFinite.
* TextureOpt: add ustring-aware versions of the decode_wrapmode utility.
* TypeDesc: allow stream << output.
* iv: raised maximum ImageCache size from 2 GB to 8 GB.
* PNM: fix bug where file exceptions could go uncaught.
* Properly create coefficients for Kodak color transform.
* iprocess: Fix bug calling read.
* maketx new options: --opaque-detect omits alpha from texture whose input
images had alpha=1 everywhere; --mipimage option allows custom MIP
levels to be assembled; --fixnan repairs NaN & Inf values in the inputs.
* Fixed bugs in sinc and Blackman-Harris filters.
* ImageCache/TextureSystem -- new reset_stats() method resets all the
statistics back to zero.
* TIFF: better handling of unexpected bitsperpixel combinations; support
the nonstandard use of IEEEFP/16bit as "half"; fix many small bugs
related to unusual depth depths and contig/separate conversions.
* JPEG-2000 plugin rewritten to use OpenJpeg library instead of Jasper.
* DPX: various bug fixes.
* RLA plugin overhauled and now has good support for non-8-bit depths.
* oiiotool improvements: --pop, --dup, --selectmip, --origin,
--incolorspace, --tocolorspace, --colorconvert.
* TextureSystem supports textures with "overscan" (including proper
maketx support for input images with overscan).
* TS/IC invalidate_all previously cleared all fingerprint info, but now
only clears fingerprints for individual files that are invalidated
(this makes for better duplicate detection).
Build system improvements:
* Support compilation on FreeBSD.
* Improved custom detection of boost-python on Windows.
* Easier to compile OIIO without using TBB.
Developer goodies:
* ArgParse enhancements: make %! indicate a bool that's set to false if
the option is found, %@ indicates an immediate callback, allow
callbacks for bool options, option matching ignores characters after
':' in the option, wrap lines at word breaks when printing usage help.
* Generate man pages for the command-line tools.
* Strutil additions: escape_chars, unescape_chars, word_wrap.
* Filesystem additions: filename(), extension().
* Sysutil additions: terminal_columns()
* Use github.com/OpenImageIO/oiio-images project for test images that are
too big to fit in testsuite.
* Fixed bugs in Timer::lap().
* Aded 'invert' algorithm to fmath.h.
* Clarify Timer docs and fix Apple-specific bug.
* testtex improvements: --wrap
Release 0.10.5 (20 Feb 2012)
----------------------------
* Improvements to anisotropic texture filtering: (1) fix for degenerate
derivatives that could corrupt the filter footpring calculations,
resulting in an infinitely long major axis; (2) more efficient subpixel
filtering for very narrow anisotropic footprints when on the highest-res
MIP level.
Release 0.10.4 (November 20, 2011)
----------------------------------
* Important texture bug fix: Improve robustness of texture lookups with
very small derivatives. The previous bug/misunderstanding had the
result of some filter footprints with very small (but valid)
derivatives inappropriately using the highest-resolution MIPmap level
and maximum anisotropy, resulting in terrible performance, alising,
and in some cases visible seams on the boundary between where this
happened and where it didn't. Be aware that the fixed code will make
some areas of texture look less sharp, but that's only because it was
aliasing before and using a totally incorrect MIPmap level.
Release 0.10.3 (November 5, 2011)
---------------------------------
* New ImageCache/TextureSystem option: "autoscanline", which, when
autotile is turned on, causes the virtual tiles to be the full width
of the image scanlines, rather than square. This improves performance
for some apps.
* Bug fix: PNG files with both associated alpha and gamma correction lost
precision when converting.
* Bug fix: ICO and Targa did not properly force requested (but
unsupported) UINT16 output to be UINT8.
* maketx (and Filter classes): fixes to sinc, blackman-harris filters.
* Minor Python binding bug fixes.
* Allow stream << of TypeDesc.
* Fix minor Timer::lap() bug.
Release 0.10.2 (August 6, 2011)
-------------------------------
* Improve the performance of ustring constructor when highly multithread.
* Remove old out-of-date Doxygen html pages.
Release 0.10.1 (August 2, 2011)
-------------------------------
* Fix TextureSystem::get_texture_info(file,"exists") (and the equivalent for
ImageCache), it was previously incorrectly giving an error if the file
didn't exist.
* Fixed an error where we were losing the error message if ImageInput::create
failed.
* maketx: --hash is deprecated, the SHA-1 hash is always computed; the
hash takes into account upstream image changes, such as resizing; the
--filter command line argument only takes the filter name, the width
is now automatically computed.
* Add static methods to Filter classes allowing queries about the names
and vital info about all available filters.
* New Filesystem::is_regular() wraps the boost is_regular and catches
exceptions.
* iv: raise the maximum ImageCache settable in the UI from 2GB to 8GB.
* Bug fixes with per-channel data formats.
* Add Strutil::escape_chars() and unescape_chars() utility functions.
* TextureOpt: add ustring-aware versions of the decode_wrapmode() utility.
Release 0.10 (June 9 2010)
--------------------------
Major new features and improvements:
* TextureSystem: fix longstanding texture quality issues: underestimation
of anisotropic filter footprint, improved metric for determining when to
switch to bicubic filtering, better MIP level selection for non-square
images.
* maketx --filter allows you to specify the filter for resizing and
downsizing to generate MIPmap levels (this lets you choose a filter