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184 Commits

Author SHA1 Message Date
Sean Barrett 52d400741c detect all 0-alpha bmp and replace with all-255; 
fix bug in reedbeta patch
 2015-09-13 04:46:50 -07:00
Sean Barrett fee80f3d83 tweaks to patch from reedbeta 2015-09-13 04:27:24 -07:00
Nathan Reed 26c98260b6 Fix warnings about "conversion to a greater size" that appear in VS2015 in x64 with /W4. 
The warning concerns the return value of stbi_err, which is an int, being converted to a pointer. In VS2015 it seems casting directly from a 32-bit int to a 64-bit pointer triggers this warning. Worked around by first converting to a 64-bit int (here size_t) and then to a pointer.
 2015-09-10 01:20:35 -07:00
Nathan Reed 6d613ed8ce Fix variable-shadowing warnings that appear in VS2015 on /W4 2015-09-10 01:13:54 -07:00
Sean Barrett 7ac0f9c9b0 fix typo in accidentally-checked-in stb_image.h 2015-09-03 22:55:01 -07:00
Sean Barrett 60939ec653 fix some more signed shifts 2015-09-03 11:18:40 -07:00
urraka 23dfb8c06b GIF loading improvements. 
- Fixed possible memory leak.
- Fix for transparent backgrounds.
- Adapted internal function to allow proper animation loading.
 2015-08-03 22:59:16 -03:00
Sean Barrett c9859afcf9 reverse some of the public-domain-license changes that I didn't 
actually want
 2015-08-01 23:53:49 -07:00
Ryan Whitworth f0e456b809 Added public domain license text 2015-08-01 14:52:12 -04:00
rmitton 6645ea5915 Fixed stupid endianness bug. 
Incorrect endianness hilariously doesn't manifest _if_ the original
image was upconverted from 8-bit to 16-bit.
 2015-07-24 12:00:09 -07:00
rmitton 608cbec1f5 Fixed overflow for high values. 
0xffff would accidentally round to 0x10000.
 2015-07-07 15:47:37 -07:00
rmitton a371b204f5 Added support for 16-bit PSD loading. 
This extends the current PSD loader to add support for 16-bit images, by
quantizing them down to 8-bit upon load.
 2015-07-07 15:15:38 -07:00
rmitton fcfa17b847 Fixed double-free in JPEG allocation 
It was incorrectly setting the wrong field to NULL, causing it to get
freed again later.
 2015-07-06 13:32:40 -07:00
Michaelangel007 c11532b872 Cleanup unused functions 2015-06-30 08:54:14 -06:00
Michaelangel007 2762b410fe Fix unused vars warning in stbi_is_hdr_from_file stbi_is_hdr_from_callbacks 2015-06-30 08:02:24 -06:00
Sean Barrett aa89970d6b stb_image.h: fix *comp value when loading PSDs 
stb_voxel_render.h: fix STBVOX_CONFIG_OPTIMIZED_VHEIGHT
 2015-05-28 22:11:45 -07:00
Sean Barrett 947bdcd027 update version numbers & docs 2015-04-19 04:19:55 -07:00
Sean Barrett 8f9c8b682d Merge branch 'master' of https://github.com/nguillemot/stb 2015-04-19 04:17:21 -07:00
Sean Barrett ac5e25ae01 bump stb_image to version 2.05, tweak docs 2015-04-19 04:15:33 -07:00
Fabian Giesen f224bc2cdb stb_image: Progressive AC decoding - fix ZRL code. 
The original AC decoding logic handled ZRL (runs of 16 zeros)
incorrectly.

The problem is that the original flow set r=16 and skipped the
final coeff write when s=0. This is not actually correct. The
problem is the intervening "refinement" bits.

With the original logic, even once we decrement r to 0, we keep
reading more refinement bits for subsequent coefficients until
we find the next currently-unsent AC in the current scan. That is,
it works as if it was trying to place 17 new AC values, and only
bails at the last minute from actually setting that 17th value.

This is wrong. Once we've found the 16th previously-unsent AC, we
need to stop reading refinement bits, otherwise we get out of sync
with the bit stream (which expects us to read a huffman code next).

The easiest fix is to just do what the JPEG standard implicitly
assumes anyway: treat ZRL as a run of 15 zeros followed by an
explicit magnitude-zero AC coeff. (That is, leave s=0 and actually
write s). So this is what this fix does.
 2015-04-19 01:49:16 -07:00
Nicolas Guillemot 1894bede3f fix signed/unsignted compare warning 2015-04-18 21:23:34 -07:00
Sean Barrett d710ada2f9 try to re-enable SSE2 support by default on mingw 64-bit 2015-04-15 02:31:12 -07:00
Sean Barrett 66a75195dc rename STBI_X86_TARGET to STBI__X86_TARGET 2015-04-12 09:36:01 -07:00
Sean Barrett c83abb051a Merge branch 'mingwfix' of https://github.com/rygorous/stb into work2 
Conflicts:
	stb_image.h
 2015-04-12 09:33:26 -07:00
Sean Barrett e5fde30800 merge two x86/x64 tests into one; update credits 2015-04-12 09:30:05 -07:00
Sean Barrett c8852111cc Merge branch 'master' of https://github.com/pmj/stb into work2 2015-04-12 09:26:25 -07:00
Sean Barrett f22efc6151 update credits/docs 2015-04-12 09:26:16 -07:00
Sean Barrett 9d7499bca6 Merge branch 'master' of https://github.com/hpesoj/stb into work2 2015-04-12 09:23:07 -07:00
Sean Barrett 040df963c8 modifications to vertical flip API: 
more consistent name,
 refactor stbi_load_main to preserve old code,
 support float HDR path,
 minor bugfix
 2015-04-12 09:20:31 -07:00
Sean Barrett e3214d7ff7 Merge branch 'master' of https://github.com/nguillemot/stb into work2 2015-04-12 09:07:32 -07:00
Sean Barrett 24e50cbd5d remove asserts that are now run-time checks; 
bump version and update credits;
minor whitespace changes;
 2015-04-12 09:04:43 -07:00
Martins Mozeiko b2d440cfb5 Fixing various crashes when loading jpg, png and tga images. 2015-04-11 15:51:20 -07:00
Nicolas Guillemot c500a90375 added stbi_vertically_flip_on_load 2015-03-29 03:03:09 -07:00
Sean Barrett 0b05bde303 quick fixes w/o version updates 2015-02-22 14:26:21 -08:00
Joseph Thomson a60912f145 Avoid GCC sign-compare warning. 
GCC 4.7 gave the warning "signed and unsigned type in conditional
expression" because the ternary operator mixes signed and unsigned
integers. Fixed by casting to unsigned inside the "if" branch instead
of casting the result of the entire conditional.
 2015-02-20 10:15:08 +00:00
Fabian Giesen 4b0c6f6634 stb_image: NEON and SSE2 SIMD detection fixes. 
This fixes two things. First, the logic to disable SSE2 on
GCC unless "-msse2" was not specific enough, and ended up
disabling SIMD support on NEON targets entirely. Shuffle
the detection logic around to make that bit x86-specific.

Second, 32-bit MinGW assumes 16-byte aligned stacks, but this is
not in the Windows ABI and hence DLLs and callbacks don't
necessarily provide it. This caused a crash.

This can be fixed by providing the right command-line option,
which we have no control over. As a compromise, disable the SSE2
path on MinGW unless a specific #define explained in the comments
is set. That way, we default to safe (never-crashing) behavior
unless the user explicitly signals they know what they're doing.
 2015-02-17 01:21:40 -08:00
Laura Dennis-Jordan abe81006db Fixed bug where NEON code was #ifdef’d out on GCC/clang even where explicitly requested. 2015-02-05 20:49:04 +01:00
Sean Barrett 5bad081711 fix incorrectly-named assert, attempt to fix (char) cast warning (tricky since char's signedness is unknown) 2015-01-19 05:18:37 -08:00
Sean Barrett 5c121a9921 don't use SIMD on gcc if it's going to fail anyway 2015-01-17 08:32:57 -08:00
Sean Barrett 6f3bda396d credits, version number 2015-01-17 08:25:08 -08:00
Sean Barrett 68c8e4851a Merge branch 'master' of https://github.com/enginmanap/stb 2015-01-17 08:22:28 -08:00
Sean Barrett d673e85e94 update credits 2015-01-17 08:22:19 -08:00
engin manap 50c5c8e8ca remove unused variable "ha" 
this variable was causing a warning while compiling with gcc.
 2015-01-12 11:41:00 +02:00
engin manap 1a9be15c1e Fix dangling else warnings 2015-01-12 11:34:48 +02:00
Sergio Gonzalez a2df517a1a Fix for warning 4244. Cast to short 2014-12-29 18:43:57 -06:00
Sean Barrett a7c8694d69 fix missing STBI_MALLOC 2014-12-25 11:11:59 -08:00
Sean Barrett 6e0ae49f87 update version number, minor docs 2014-12-25 01:40:04 -08:00
Fabian Giesen febbc34a16 stb_image: Rename SSE2/NEON IDCTs to idct_simd. 2014-12-24 10:53:31 +01:00
Fabian Giesen d92ab86c65 stb_image: Fix PNG initial size guess for 1/2/4 bpc. 2014-12-24 10:15:28 +01:00
Fabian Giesen fb109abeaf stb_image: Update comments. 2014-12-24 10:07:52 +01:00
Sean Barrett 7f94e7e591 add #defines to allow disabling decoders for unwanted formats 2014-12-23 21:36:20 -08:00
Sean Barrett 53ca163e85 cleanup merge of ARM NEON support 
tweak docs
 2014-12-23 20:58:22 -08:00
Sean Barrett de385bb6bb Merge branch 'fastjpeg' into working 2014-12-23 20:24:46 -08:00
Fabian Giesen fd987527f1 stb_image: NEON YCbCr->RGB kernel. 
Also ran a bunch of test cases to make sure the IDCT and H2V2
resamplers were correct.
 2014-12-24 01:38:59 +01:00
Fabian Giesen 7d32f74d8a Merge branch 'fastjpeg' of https://github.com/nothings/stb into fastjpeg 
Conflicts:
	stb_image.h
 2014-12-23 23:52:12 +01:00
Sean Barrett 5b53d20c68 Put progressive JPEG AC decode logic back the way I wrote it originally (I changed it to match jpgd when I was trying to figure out why it didn't work); 
add STBI__ prefixes to internal SCAN_ enum;
strip unused function arguments for progressive funcs;
tweak release notes;
forget to git commit frequently so these would all be in their own commits;
 2014-12-23 05:11:36 -08:00
Sean Barrett 6403f319f7 tweak documentation 
stbi__ prefix on two functions that were missing it
 2014-12-21 08:30:27 -08:00
Sean Barrett e4fb737f66 Merge branch 'ppm' into working 
Conflicts:
	stb_image.h
 2014-12-21 08:23:34 -08:00
Sean Barrett 49d4d3193f fix non-progressive jpegs (had commented out a line accidentally); 
fix long-standing bug where gifs were just broken AFAICT
 2014-12-21 08:21:17 -08:00
Sean Barrett 33e24eafa0 in progress progressive stuff 2014-12-21 07:53:05 -08:00
Fabian Giesen a32d73dc3b stb_image: NEON integer IDCT (not yet tested!) 2014-12-21 12:55:50 +01:00
Fabian Giesen 0f3bf1564b stb_image: JPEG resampler func for NEON 2014-12-21 12:46:57 +01:00
Sean Barrett 9ad85cc8d2 tweak release docs 
tweak credits
tweak revision history
remove trailing whitespace
 2014-12-20 06:22:17 -08:00
Sean Barrett b4e526d7cf PNM cleanup 
fix a few old error messages
 2014-12-20 06:09:23 -08:00
Sean Barrett 97949493fb Merge branch 'master' of https://github.com/kennethdmiller3/stb into ppm 2014-12-20 05:49:19 -08:00
Sean Barrett ba5e333faf STBI_MALLOC etc. 
some documentation cleanup
 2014-12-20 05:46:13 -08:00
Sean Barrett bd6b78f268 finalize scalar YCbCr conversion back-ported from SSE version; 
add missing STBIDEFs to a few functions;
update documentation with full 1.49 info even though most isn't implemented yet
 2014-12-20 05:13:25 -08:00
Sean Barrett f259bf27e9 VC6: 
support using inline asm for cpuid

YCbCr:
  switch SSE code to constants that match old C;
  create C version that is same as SSE;
  tiny optimization(?) of SSE
 2014-12-19 04:39:04 -08:00
Fabian Giesen b082091bcb stb_image: GCC fix for new SIMD stuff. 2014-12-18 08:31:03 -08:00
Fabian Giesen 42bb08b10b stb_image: Add SSE2 h2v2 resampling kernel. 2014-12-18 08:11:05 -08:00
Fabian Giesen c625d24197 stb_image: First-pass stbi__sse2_available for GCC 2014-12-18 07:52:44 -08:00
Fabian Giesen aabf2c5c49 stb_image: SSE2 YCbCr->RGB kernel 2014-12-18 07:41:41 -08:00
Fabian Giesen d95f7acb32 stb_image: Remove old installable IDCT path. 2014-12-18 07:25:41 -08:00
Fabian Giesen e5db25f637 stb_image: Add SSE2 IDCT for JPEG decoder. 
Also add SSE2 detection for MSVC++. Detection on GCC will follow
later.
 2014-12-18 07:22:42 -08:00
Fabian Giesen fb2c841bb8 stb_image: Add more of the SSE2 skeleton. 2014-12-18 07:03:21 -08:00
Fabian Giesen c6a3235995 stb_image: IDCT kernel func ptr in stbi__jpeg 
I want to support SSE2 kernels that auto-detect. If implemented
using globals, this would trigger thread race checkers if stb_image
was used in multiple threads. Just make the kernels be explicitly
per-stbi__jpeg to avoid this.

(This commit is the first step in replacing existing STBI_SIMD
functionality.)
 2014-12-18 06:49:41 -08:00
Fabian Giesen 518306517c stb_image: JPEG dequant in decode_block not IDCT. 
Inside decode_block, we're still sparse, and we can use that
sparsity pattern without doing extra work to discover it.
 2014-12-18 06:31:53 -08:00
Fabian Giesen 1d5652044d stb_image: JPEG fast_ac table - decode entire AC at once. 2014-12-18 06:30:42 -08:00
Fabian Giesen a1bd1f7f1f stb_image: Faster stbi__extend_receive. 2014-12-18 06:25:42 -08:00
Ken Miller bdc918751d Merge branch 'master' of https://github.com/nothings/stb 2014-12-15 01:09:59 -06:00
Sean Barrett f547761c15 Fix assert() that should be STBI_ASSERT() 2014-12-14 18:14:14 -08:00
Sean Barrett 91255cb1cd update stb_image version & changelog 2014-12-14 02:06:33 -08:00
Sean Barrett f9e593c25c Merge branch 'optimize' of https://github.com/rygorous/stb into working 
Conflicts:
	stb_image.h

Also disable VC6 automatic precompiled headers which were enabled in some projects.
 2014-12-14 01:57:22 -08:00
Sean Barrett 8ac015c03f fix 1/2/4-bit png to filter bytes before decoding to pixels; 
rename pngsuite/part1 to pngsuite/primary;
check in pngsuite
 2014-12-14 01:43:23 -08:00
Sean Barrett 8679ce08b7 fix incorrect img_n variable for interlaced files, caused files to be totally incorrect if forcing channel count 2014-12-13 23:35:55 -08:00
Fabian Giesen 1996a019ac stb_image: Guess decoded image size before zlib decode to avoid unnecessary reallocs. 2014-12-13 19:15:38 -08:00
Fabian Giesen 3d6dccf0c4 stb_image: Make 'fast' table contain code size and value directly. 2014-12-13 18:48:37 -08:00
Fabian Giesen 007de5eb6e stb_image: Extract zhuffman_decode slow path into own function. 2014-12-13 18:18:36 -08:00
Fabian Giesen cdc230598e stb_image: Fast path for matches with dist=1 (runs) in stbi__parse_huffman_block. 2014-12-13 18:07:00 -08:00
Fabian Giesen 92b9e262b7 stb_image: Keep zout in a local var during stbi__parse_huffman_block. 2014-12-13 17:58:36 -08:00
Fabian Giesen 8188e842e2 stb_image: Add 'static' for some internal funcs, STBIDEF for external ones. 2014-12-13 17:31:51 -08:00
Fabian Giesen 61428d4526 stb_image: Trivial optimizations for filter path when img_n==out_n. 2014-12-13 17:22:57 -08:00
ocornut 1be86b37d6 Documentation 2014-09-26 00:06:30 +01:00
ocornut 50d9752612 Removing tabs and using 3-spaces indents to match local coding style 2014-09-26 00:01:45 +01:00
ocornut 09a1ab87a0 Fix for interlaced and small images + cleanup 2014-09-25 23:52:24 +01:00
ocornut 3b3e2996e7 Unpack 1/2/4 bpp into 8 bpp scanline buffer + support grayscale 1/2/4 bpp 2014-09-25 21:59:50 +01:00
ocornut f2b3ebd470 Support for 1/2/4-bit palettized PNG 2014-09-25 19:30:47 +01:00
Ken Miller 8e91cb2b7d treat vertical tab and form feed characters as whitespace 2014-09-07 00:48:48 -05:00
Ken Miller e003c66498 support PGM and PPM formats 2014-09-07 00:38:18 -05:00
Tero Hänninen a5f1cb5657 Fix comments 2014-09-05 18:38:39 +03:00