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38 Commits

Author SHA1 Message Date
DRC
e817c07779 tjLoadImage(): return TJPF_GRAY for grayscale BMPs 
... if *pixelFormat=TJPF_UNKNOWN is passed to the function.
 2017-11-19 08:43:07 -06:00
DRC
479fa1d870 tjLoadImage(): Don't convert RGB to grayscale 
Loading RGB image files into a grayscale buffer isn't a particularly
useful feature, given that libjpeg-turbo can perform this conversion
much more optimally (with SIMD acceleration on some platforms) during
the compression process.  Also, the RGB2GRAY() macro was not producing
deterministic cross-platform results because of variations in the
round-off behavior of various floating point implementations, so
`tjunittest -bmp` was failing in i386 builds.
 2017-11-18 11:40:53 -06:00
DRC
dc4b900223 TurboJPEG: Add alpha offset array/method 
Also, set the red/green/blue offsets for TJPF_GRAY to -1 rather than 0.
It was undefined behavior for an application to use those arrays/methods
with TJPF_GRAY anyhow, and this makes it easier for applications to
programmatically detect whether a given pixel format has red, green, and
blue components.
 2017-11-17 22:49:07 -06:00
DRC
aa7459050d TurboJPEG C API: Add BMP/PPM load/save functions 
The main justification for this is to provide new libjpeg-turbo users
with a quick & easy way of developing a complete JPEG
compression/decompression program without requiring them to build
libjpeg-turbo from source (which was necessary in order to use the
project-private bmp API) or to use external libraries.  These new
functions build upon significant enhancements to rdbmp.c, wrbmp.c,
rdppm.c, and wrppm.c which allow those engines to convert directly
between the native pixel format of the file and a pixel format
("colorspace" in libjpeg parlance) specified by the calling program.
rdbmp.c and wrbmp.c have also been modified such that the calling
program can choose to read or write image rows in the native (bottom-up)
order of the file format, thus eliminating the need to use an inversion
array.  tjLoadImage() and tjSaveImage() leverage these new underlying
features in order to significantly improve upon the performance of the
old bmp API.

Because these new functions cannot work without the libjpeg-turbo
colorspace extensions, the libjpeg-compatible code in turbojpeg.c has
been removed.  That code was only there to serve as an example of how
to use the TurboJPEG API on top of libjpeg, but more specific, buildable
examples now exist in the https://github.com/libjpeg-turbo/ijg
repository.
 2017-11-17 19:32:52 -06:00
DRC
f3ad13e3d8 TJBench/TJUnitTest: Don't ignore mistyped args 2017-11-13 16:00:35 -06:00
DRC
5426a4cb16 TJUnitTest: Usage formatting tweaks 2017-09-02 04:08:06 +00:00
mayeut
f57bae0ddd Fix memory leak when running tjunittest -yuv 
Closes #61
 2016-02-25 17:14:56 -06:00
DRC
f5644c3498 Ensure that tjFree() is used for any JPEG buffers that might have been dynamically allocated by the compress/transform functions. To keep things simple, we use tjAlloc() for the statically-allocated buffer as well, so that tjFree() can always be used to free the buffer, regardless of whether it was allocated by tjbench or by the TurboJPEG library. This fixes crashes that occurred on Windows when running tjunittest or tjbench with the -alloc flag. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1383 632fc199-4ca6-4c93-a231-07263d6284db
 2014-08-22 19:27:28 +00:00
DRC
eb66974f3a Ensure that tjFree() is used for any JPEG buffers that might have been dynamically allocated by the compress/transform functions. To keep things simple, we use tjAlloc() for the statically-allocated buffer as well, so that tjFree() can always be used to free the buffer, regardless of whether it was allocated by tjbench or by the TurboJPEG library. This fixes crashes that occurred on Windows when running tjunittest or tjbench with the -alloc flag. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1384 632fc199-4ca6-4c93-a231-07263d6284db
 2014-08-22 19:59:51 +00:00
DRC
fe80ec2275 If the output buffer in the TurboJPEG destination manager was allocated by the destination manager and is being reused from a previous compression operation, then we need to get the buffer size from the previous operation, since the calling program doesn't know the actual buffer size. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1368 632fc199-4ca6-4c93-a231-07263d6284db
 2014-08-21 15:51:47 +00:00
DRC
12c29c9a7f Remove unneeded/unused code 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1169 632fc199-4ca6-4c93-a231-07263d6284db
 2014-03-14 08:59:27 +00:00
DRC
c90144950f When tjDecodeYUV() is used with a "fresh" decompressor instance (one that hasn't been previously used to decompress a JPEG image), then it needs comps_in_scan, data_precision, and the quantization tables to be defined. This patch also extends TJUnitTest to check for this error. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1143 632fc199-4ca6-4c93-a231-07263d6284db
 2014-03-10 09:34:04 +00:00
DRC
20e158dcb7 Silence valgrind false positives about uninitialized values. Even with this patch, valgrind still complains about uninitialized values when decompressing or decoding to a buffer with an alpha-enabled colorspace. Not sure why this happens, but it occurs in libjpeg-turbo 1.3 as well, and only when the x86/x86-64 SIMD code is being used. It is my belief that these remaining warnings are also false positives, because if the output buffer is memset to all 0's prior to invoking tjDecodeYUV()/tjDecompress(), no errors are reported. If any of the alpha channel bits were in fact not being initialized, then they would still be 0 after invoking tjDecodeYUV()/tjDecompress(), and TJUnitTest would report an error. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1142 632fc199-4ca6-4c93-a231-07263d6284db
 2014-03-08 20:50:35 +00:00
DRC
f27f38b02d Add a blank line before the alpha-enabled colorspace tests in order to improve readability 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1141 632fc199-4ca6-4c93-a231-07263d6284db
 2014-03-08 20:32:37 +00:00
DRC
4798b7e806 Add a blank line before the alpha-enabled colorspace tests in order to improve readability 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1140 632fc199-4ca6-4c93-a231-07263d6284db
 2014-03-08 20:31:31 +00:00
DRC
34dca05227 Implement a YUV decode function in the TurboJPEG API, to be symmetric with tjEncodeYUV(). 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1132 632fc199-4ca6-4c93-a231-07263d6284db
 2014-02-28 09:17:14 +00:00
DRC
2bdadb44a7 Remove benchmarks. They were originally intended as a way of measuring overhead for small compress/decompress operations, but using TJBench with a small image is a better way to accomplish that. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1131 632fc199-4ca6-4c93-a231-07263d6284db
 2014-02-28 09:06:42 +00:00
DRC
2c0c807fcc Fix an issue that prevented tjEncodeYUV2() and TJCompressor.encodeYUV() from working properly if the source image was very tiny. Basically, jpeg_start_compress() was attempting to write the JPEG headers, which was overrunning the YUV buffer. This patch removes the call to jpeg_start_compress() in tjEncodeYUV2() and replaces it with calls to the individual routines that are necessary to initialize the color converter and downsampler. TJUnitTest has also been modified to test for this condition (the buffer size regression test now works in YUV mode.) 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1120 632fc199-4ca6-4c93-a231-07263d6284db
 2014-02-11 09:56:12 +00:00
DRC
38c9970b95 Fix an issue that prevented tjEncodeYUV3() and TJCompressor.encodeYUV() from working properly if the source image was very tiny. Basically, jpeg_start_compress() was attempting to write the JPEG headers, which was overrunning the YUV buffer. This patch removes the call to jpeg_start_compress() in tjEncodeYUV3() and replaces it with calls to the individual routines that are necessary to initialize the color converter and downsampler. TJUnitTest has also been modified to test for this condition (the buffer size regression test now works in YUV mode.) 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1118 632fc199-4ca6-4c93-a231-07263d6284db
 2014-02-11 09:45:18 +00:00
DRC
fe739656f9 Clean up formatting code and rename the JPEG files generated during the YUV decode tests to reflect the fact that they are being generated from YUV source images. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1068 632fc199-4ca6-4c93-a231-07263d6284db
 2013-10-31 04:53:27 +00:00
DRC
910a35725c Extend the TurboJPEG C API to support compressing JPEG images from YUV planar images 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1067 632fc199-4ca6-4c93-a231-07263d6284db
 2013-10-30 23:02:57 +00:00
DRC
38cb1ec2a7 Add CMYK support to the TurboJPEG Java API & clean up a few things in the C API 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1020 632fc199-4ca6-4c93-a231-07263d6284db
 2013-08-23 04:45:43 +00:00
DRC
cd7c3e6672 Add CMYK support to the TurboJPEG C API 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1019 632fc199-4ca6-4c93-a231-07263d6284db
 2013-08-23 02:49:25 +00:00
DRC
1f3635c496 Add 4:1:1 subsampling support in the TurboJPEG C API 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1014 632fc199-4ca6-4c93-a231-07263d6284db
 2013-08-18 10:19:00 +00:00
DRC
418fe286c2 Fix incorrect data output and buffer overruns in the new tjDecompressToYUV2() function whenever scaling is used along with a 4:2:0 JPEG image; extend tjunittest and TJUnitTest to test for these issues. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@982 632fc199-4ca6-4c93-a231-07263d6284db
 2013-05-07 21:17:35 +00:00
DRC
b7c41932ed Clean up the output of tjunittest and TJUnitTest 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@981 632fc199-4ca6-4c93-a231-07263d6284db
 2013-05-04 23:41:33 +00:00
DRC
49df783743 Clean up the output of tjunittest and TJUnitTest 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@980 632fc199-4ca6-4c93-a231-07263d6284db
 2013-05-04 23:31:32 +00:00
DRC
fef9852da3 Extend the TurboJPEG Java API to support generating YUV images with arbitrary padding and to support image scaling when decompressing to YUV 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@975 632fc199-4ca6-4c93-a231-07263d6284db
 2013-04-28 01:32:52 +00:00
DRC
f610d61fcc Extend the TurboJPEG C API to support generating YUV images with arbitrary padding and to support image scaling when decompressing to YUV 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@962 632fc199-4ca6-4c93-a231-07263d6284db
 2013-04-26 10:33:29 +00:00
DRC
cac105133e Fix the behavior of the alpha-enabled colorspace constants whenever libjpeg-turbo is built without SIMD support and merged upsampling is used. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.2.x@811 632fc199-4ca6-4c93-a231-07263d6284db
 2012-03-16 14:37:36 +00:00
DRC
67ce3b2352 Added new alpha channel colorspace constants/pixel formats, so applications can specify that they need the unused byte in a 4-component RGB output buffer set to 0xFF when decompressing. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@732 632fc199-4ca6-4c93-a231-07263d6284db
 2011-12-19 02:21:03 +00:00
DRC
c08e8c15bc When decompressing to a 4-byte RGB buffer, set the unused byte to 0xFF so it can be interpreted as an opaque alpha channel. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@699 632fc199-4ca6-4c93-a231-07263d6284db
 2011-09-08 23:54:40 +00:00
DRC
e835ee3340 Windows doesn't have random() 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@672 632fc199-4ca6-4c93-a231-07263d6284db
 2011-07-15 10:06:56 +00:00
DRC
724c56b46a Use random noise to ensure that the JPEG image generated in the buffer size test exceeds the size of the uncompressed source image. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@669 632fc199-4ca6-4c93-a231-07263d6284db
 2011-07-12 06:22:06 +00:00
DRC
9b49f0e4c7 Re-work TJBUFSIZE() to take into account the level of chrominance subsampling 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@668 632fc199-4ca6-4c93-a231-07263d6284db
 2011-07-12 03:17:23 +00:00
DRC
c52c55670a git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@661 632fc199-4ca6-4c93-a231-07263d6284db 2011-06-15 02:43:42 +00:00
DRC
215aa8b78b Re-factor checkBufYUV() function to more closely resemble re-factored checkBuf() function 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@654 632fc199-4ca6-4c93-a231-07263d6284db
 2011-05-27 02:10:42 +00:00
DRC
b8b359ae97 "jpegut"="tjunittest" & "jpgtest"="tjbench" 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@644 632fc199-4ca6-4c93-a231-07263d6284db
 2011-05-25 03:54:56 +00:00