mirrors
/
nothings-stb
mirror of https://github.com/nothings/stb.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
2,173 Commits 2 Branches 0 Tags 17 MiB
Commit Graph

2173 Commits

Author SHA1 Message Date
Sean Barrett ae721c50ea
Merge pull request #1609 from jeffrbig2/fix_coeffs 
Fix bug in coeff gen on more than 3x downsamples with w and h equal
 2024-02-12 23:49:35 -08:00
Jeff Roberts (Bellevue) 2fb057af65 remove test 2024-02-12 22:14:27 -08:00
Jeff Roberts (Bellevue) 1828f357dc Fix bug in coeff generation on more than 3x downsamples with width and height scale equal 2024-02-12 22:10:02 -08:00
Sean Barrett b7cf124628 stb_image: fix VC6 2024-02-08 13:24:06 -08:00
Jeff Roberts (Bellevue) c59da6729e Mark row0 as unused 2024-02-08 12:53:51 -08:00
Jeff Roberts (Bellevue) 7f7e3469cf clean up comments 2024-02-08 10:36:54 -08:00
Jeff Roberts (Bellevue) 7a075fe7c7 Fix 2 pixel to 1 pixel with wrap 
Fix output buffer for output callback
 2024-02-04 14:42:51 -08:00
Sean Barrett f4a71b1337 README.md: tweak credits 2023-12-14 10:59:23 -08:00
Sean Barrett a8a25e17b5 update readme version numbers 2023-12-14 03:13:59 -08:00
Sean Barrett 0bc88af4de stb_image: optimizations 2023-12-14 03:13:59 -08:00
Sean Barrett 0ca75da4ec stb_image_resize2: remove whitespace 2023-12-14 03:13:59 -08:00
Sean Barrett 9d924f8a47 stb_image_resize: 2.04 2023-12-14 03:13:59 -08:00
Fabian Giesen 4da08a1dbd stb_image: create_png_image_raw restructuring 
Allocate filter_buf for two scan lines that we do all the filter
processing in, then do all other conversions (bit depth,
endianness, inserting alpha=255 values) on the way out.

Separating the two concerns makes everything much clearer.
 2023-12-14 03:13:59 -08:00
Fabian Giesen c6d7c32e5d stb_image: Two warning fixes 2023-12-14 03:13:59 -08:00
Fabian Giesen 07268cbf36 stb_image: New Paeth filter 
This formulation is equivalent to the original (reference)
implementation but runs _significantly_ faster - this speeds up
the filtering portion of a Paeth-heavy 8192x8192 16-bit/channel
image by a factor of more than 2 on a Zen2 CPU.

I'm investigating doing a more thorough restructuring of this pass,
but this seems like a good first step.
 2023-12-14 03:13:59 -08:00
Fabian Giesen ed64333410 tests: test_png_regress 
I want to make some changes to the PNG loader, this is to get some
test coverage at least to make it easier not to break anything.

The two ref_results files that are "corrupt" files that stb_image
nevertheless loads without error are checksum failures; this is
by design, since stb_image does not verify checksums.
 2023-12-14 03:13:59 -08:00
Fabian Giesen 45eb4ac158 global: very basic .gitignore for object files 2023-12-14 03:13:59 -08:00
Fabian Giesen e5f0e18d0f stb_image: Small PNG filter simplification 
Paeth on the first scanline is not a separate filter, it
happens to be equivalent to the "sub" filter which is already
an option.
 2023-12-14 03:13:59 -08:00
Fabian Giesen d373674115 stb_image: Fix zlib decoder end-of-stream handling 
We speculatively try to fill our bit buffer to always contain
at least 16 bits for stbi__zhuffman_decode. It's not a sign of
a malformed stream for us to be reading past the end there,
because the contents of that bit buffer are speculative; it's
only a malformed stream if we actually _consume_ the extra bits.

This fix adds some extra logic where we the first time we hit
zeof, we add an explicit 16 extra zero bits at the top of the
bit buffer just so that for the purposes of the decoder, we have
16 bits in the buffer.

However, if at the end of stream, we have the "hit zeof once"
flag set and less than 16 bits remaining in the bit buffer, we
know some of those implicit zero bits got read, which indicates
we actually had a past-end-of-stream read. In that case, flag
it as an error.

While I'm in here, also rephrase the length-too-large check to
not do any potentially-overflowing pointer arithmetic.

Fixes issue #1456.
 2023-12-14 03:13:59 -08:00
Sean Barrett 03f50e343d security notice 2023-11-15 09:36:28 -08:00
Sean Barrett 1d878bd2a3 security notice 2023-11-15 09:35:21 -08:00
Sean Barrett beebb24b94 README.md: fix reference to stb_image_resize2.h 2023-10-11 17:32:00 -07:00
Sean Barrett e81f294b16 stb_image_resize: switch GNU/clang from "asm" to "__asm__" for -c99 compatibility 2023-10-11 17:28:56 -07:00
Sean Barrett c4bbb6e75f stb_image_resize2.h 2.00 2023-10-09 17:23:04 -07:00
Sean Barrett 5736b15f7e re-add perlin noise again 2023-01-29 10:47:07 -08:00
Sean Barrett 3ecc60f25a add version history update for stb_image 2023-01-29 10:19:12 -08:00
Sean Barrett 6199bf7713 update stb_image to 2.28 2023-01-29 06:24:13 -08:00
Sean Barrett 7c14c47e2f Merge branch 'sean_image' 2023-01-29 06:19:13 -08:00
Sean Barrett 1891060782 a fix 2023-01-29 06:17:45 -08:00
Fabian Giesen 40eb865b3b stb_image: header scan mode always needs to check for tRNS 
For paletted images, header-scanning mode (used by stbi_info) kept
going after the image header to see if a tRNS (transparency) chunk
shows up to correctly determine the channel count, but we would
immediately return after IHDR for non-paletted images.

This is incorrect. We also change our reported channel count on
RGB images with a tRNS chunk, therefore non-paletted images also
have to resume scanning further chunks.

Update the logic to keep scanning regardless and report the
correct channel count from stbi_info for RGB images with tRNS
(constant alpha channel).

Fixes issue #1419.
 2023-01-23 00:46:33 -08:00
Fabian Giesen 24fa1ff2e9 stb_image: Fix broken indenting introduced earlier 2023-01-22 19:44:49 -08:00
Fabian Giesen 0613e9c043 stb_image: Tweak end-of-JPEG junk scanning loop. 
Be a bit more picky about what we consider a valid marker.
0xff 0x00 (stuffed 0 byte) should not count.

Fixes issue #1409.
 2023-01-22 19:42:55 -08:00
Fabian Giesen 1096389590 stb_image: Accept some extra data between BMP header and payload 
Limit to 1k, which is the maximum size of a 256-entry palette that
would ordinarily go there. It feels sensible to relax this a bit but
we don't want to go overboard.

Fixes issue #1325.
 2023-01-22 18:52:04 -08:00
Fabian Giesen 51d295e33e stb_image: Add trailing semicolon to usage example 
Fixes issue #1330 reported by lunasorcery.
 2023-01-22 16:16:02 -08:00
Fabian Giesen 038b6ab9ec stb_image: Avoid stdint.h on 32-bit Symbian. 
As suggested by "mupfdev" on Github. We don't have a way to test
here but seems simple enough.

Fixes issue #1321.
 2023-01-22 15:51:38 -08:00
Fabian Giesen b15b04321d Merge branch 'NeilBickford-NV-neilbickford/additional-image-fixes' into dev 2023-01-22 15:33:45 -08:00
Fabian Giesen 4d160de463 stb_image: Fix name of stbi_set_unpremultiply_on_load_thread impl 
Bug reported by N-R-K. Fixes #1276.
 2023-01-22 15:29:01 -08:00
Fabian Giesen e5da6acacd Merge branch 'neilbickford/image_hdr_pgm_fixes' into dev 2023-01-22 15:12:38 -08:00
Neil Bickford 9f22cc9008 stb_image PNG: Checks for invalid DEFLATE codes. 
Specifically, this rejects length codes 286 and 287, and distance codes 30 and 31.
This avoids a scenario in which a file could contain a table in which
0 corresponded to length code 287, which would result in writing 0 bits.

Signed-off-by: Neil Bickford <nbickford@nvidia.com>
 2023-01-22 15:07:14 -08:00
Neil Bickford 5cfc2a744a Zero-initialize stbi__jpeg to avoid intermittent errors found by fuzz-testing 2022-11-29 00:36:36 -08:00
Neil Bickford 47164e4086 Add checks for signed integer overflow; further guard against cases where stbi__grow_buffer_unsafe doesn't read all bits required. 2022-11-29 00:36:36 -08:00
Neil Bickford 96fe76c213 Add range checks to fix a few crash issues in stb_image issues 1289 and 1291 2022-11-29 00:36:36 -08:00
Neil Bickford 84b94010a7 Add checks for PNM integer read overflows, add a 1GB limit on IDAT chunk sizes to fix an OOM issue, and check for a situation where a sequence of bad Huffman code reads could result in a left shift by a negative number. 2022-11-29 00:36:36 -08:00
Neil Bickford 2a02ff76b5 Fixes two stb_image issues that could occur with specially constructed HDR and PGM files. 
Signed-off-by: Neil Bickford <nbickford@nvidia.com>
 2022-11-29 00:36:23 -08:00
Sean Barrett 8b5f1f37b5 update readme 2022-09-08 09:40:02 -07:00
Sean Barrett bc00c178ac Merge branch 'master' of https://github.com/nothings/stb 2022-09-08 09:36:55 -07:00
Sean Barrett 4af130e863 stb_perlin.h: restore file now that patent is expired 2022-09-08 09:35:48 -07:00
Sean Barrett af1a5bc352
Update bug_report.md 2021-09-10 00:48:29 -07:00
Sean Barrett 37e21f17b2
Update bug_report.md 2021-09-10 00:47:35 -07:00
Sean Barrett b9e1d86edc
Create config.yml 2021-09-10 00:43:51 -07:00