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Author SHA1 Message Date
Sean Barrett
a9778b8dbd tweak docs; fix compile error in UNUSED_PARAM stuff 2014-09-12 04:46:41 -07:00
Sean Barrett
99f3b78bbd Merge branch 'resample' of http://github.com/bsvino/stb into resample 2014-09-12 03:54:17 -07:00
Sean Barrett
df128b7995 update STBIR__UNUSED_PARAM to match stb_image.h version 2014-09-12 03:53:36 -07:00
Jorge Rodriguez
ca88b6fba6 Calculate and store vertical contributors first so that they can be normalized and optimized. 2014-09-11 12:45:18 -07:00
Jorge Rodriguez
a25c1d2bbd Merge remote-tracking branch 'remotes/nothings/resample' into resample 2014-09-11 10:00:57 -07:00
Jorge Rodriguez
36b417f6b4 Optimizations: Skip zero-coefficient contributions. Reduce the size of the coefficients array when downsampling. 2014-09-11 09:53:14 -07:00
Sean Barrett
27f26f8337 Documentation; 
rename STBIR_FLAG_PREMULTIPLED_ALPHA to STBIR_FLAG_ALPHA_PREMULTIPLIED so that both flags have "ALPHA" first
 2014-09-11 03:02:20 -07:00
Sean Barrett
7a4f1f4665 update with new tests for srgb conversion 2014-09-11 02:10:37 -07:00
Sean Barrett
16d68d14f8 fix stbir__linear_to_srgb_uchar: 
1. table stored threshhold of transition from i to i+1, but wants to be i-1 to i
    2. table was computed by dividing uchar by 256.0 instead of 255.0, causing it to be 100% wrong
 2014-09-11 02:05:53 -07:00
Sean Barrett
30c7a981ec compile as C; 
fix some unsigned/signed comparisons;
avoid round() since it's not in pre-C99 C;
remove MAX_CHANNELS since I never ended up needing it;
rename STBIR_EPSILON to STBIR_ALPHA_EPSILON;
don't use STBIR_ALPHA_EPSILON on float input (can't remove it properly due to numeric precision, and they can do it themselves);
optimize subtraction of STBIR_ALPHA_EPSILON;
sorry i forgot to commit these separately!;
 2014-09-11 01:47:50 -07:00
Sean Barrett
1208730e1e Merge branch 'resample' of http://github.com/bsvino/stb into resample 2014-09-11 01:15:09 -07:00
Jorge Rodriguez
793818d1af Skip zero-coefficient contributors, a fairly decent speedup. 2014-09-10 20:26:14 -07:00
Jorge Rodriguez
46dc8f84fb Use vertical pixel width for the ring buffer. 2014-09-10 20:12:38 -07:00
Jorge Rodriguez
953a637841 Use a carefully shaped trapezoid instead of a box filter to avoid jumps between pixel values. 2014-09-10 19:08:11 -07:00
Sean Barrett
671f04bd7e debugging truetype crash 2014-09-10 15:35:06 -07:00
Sean Barrett
4e580cf9ed fix compile 2014-09-10 15:11:35 -07:00
Jorge Rodriguez
6922628106 Use an even smaller epsilon. Allow the user to avoid the epsilon business if they want to preserve their alpha values. 2014-09-10 15:03:55 -07:00
nothings
057f29f813 update version number 2014-09-10 11:03:49 -07:00
nothings
87b7e3db41 update version number 2014-09-10 11:03:26 -07:00
nothings
5db8a8bc36 Merge pull request #42 from rygorous/master 
stb_textedit: Add support for alternative keyboard shortcuts for text/line start/end.
 2014-09-10 11:02:04 -07:00
Fabian Giesen
40cc1c59b2 Add support for alternative keyboard shortcuts for text/line start/end. 2014-09-10 10:54:22 -07:00
Jorge Rodriguez
c9d67446d2 Reverse allocation routines parameter order so that the context is at the back. 2014-09-09 22:57:15 -07:00
Jorge Rodriguez
17b931047c Add the epsilon value into the alpha instead of using an if statement. It's a tiny bit faster and it can be removed afterwards. 2014-09-09 22:47:53 -07:00
Jorge Rodriguez
1d5c902e2e These minor optimizations were probably already done by the compiler but they can't hurt. 2014-09-09 22:07:40 -07:00
Jorge Rodriguez
41e6aad693 Avoid repeated adds and ensure correct round-trip result. 2014-09-09 21:57:46 -07:00
Jorge Rodriguez
f2102d906f Use the info structure to keep track of our memory block sizes to reduce duplicated code and cut down on errors. 2014-09-09 20:58:19 -07:00
Jorge Rodriguez
969ff7c850 Make sure calculate_memory matches with the allocations. Fix some errant asserts. 2014-09-09 20:51:29 -07:00
Jorge Rodriguez
8355ea1184 Use height, not width, for correct progress report. 2014-09-09 18:41:28 -07:00
Jorge Rodriguez
4b69c0637e If alpha is zero then sneakily replace it with a very small nonzero so that the color data is preserved. 
Pre-process n1 so that we don't have to do it later on. Can't do n0 since it's used to find the coefficient index.
 2014-09-09 18:38:05 -07:00
Jorge Rodriguez
d510d70b6a Report downsample progress by when we empty the ring buffer, it's more accurate that way. 2014-09-09 16:35:00 -07:00
Jorge Rodriguez
084baed15c Replace premul test with better premul test that doesn't require visual inspection. 2014-09-09 16:30:06 -07:00
Jorge Rodriguez
497eab8339 Normalize downsample coefficients. 2014-09-09 15:22:29 -07:00
Jorge Rodriguez
43fbc1d5e3 Rearrange the algebra on two of the filters to avoid repeating decimals which cause precision loss. Use int32 to test filters because it's more accurate. 2014-09-09 14:10:14 -07:00
Jorge Rodriguez
ca241daefa Use rounding to try to preserve the original value. Fix test case. 2014-09-09 12:16:23 -07:00
Jorge Rodriguez
145690788c Use input_h + pixel_margin * 2 to prevent progress report from ever going above 1. Always report a 0 before and a 1 at the end of each resize. 2014-09-09 10:58:01 -07:00
baldurk
fb8eabd6b8 Add .hdr file writing support 2014-09-09 08:33:25 +01:00
Jorge Rodriguez
118f28557e Tests to ensure images of a solid color stay the same solid color after resampling. 2014-09-07 16:47:02 -07:00
Jorge Rodriguez
e6c47ec657 Fix kernel lookup for downsampling. 2014-09-07 12:57:53 -07:00
Jorge Rodriguez
8cc6a3abfc If there's no context we're using the simple API functions - fall back to malloc and free. 2014-09-07 10:02:51 -07:00
Sean Barrett
36db03f390 tighten bounds on filter normalization test 2014-09-07 05:31:40 -07:00
Sean Barrett
7f8ac35e42 check whether filter kernels are normalized 2014-09-07 05:29:43 -07:00
Sean Barrett
7da729bfce restore correct definition of box 2014-09-07 04:07:07 -07:00
Sean Barrett
08ca345839 Merge branch 'resample2' into resample 2014-09-07 03:36:16 -07:00
Sean Barrett
cd1fbacbb6 rename NEAREST to BOX 
write test for BOX
 2014-09-07 03:19:18 -07:00
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
Jorge Rodriguez
586e84087c Correctly specify alpha channels. 2014-09-06 21:50:28 -07:00
Jorge Rodriguez
38ce5494bc Clarify some comments. Make stbir__resize_arbitrary an internal function. Update test cases to use actual API functions. 2014-09-06 20:17:19 -07:00
Sean Barrett
41555b5d53 update test cases to work on things other than barbara.png 2014-09-06 14:58:32 -07:00
Jorge Rodriguez
fb059fcece Progress report. 2014-09-06 10:57:21 -07:00