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
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
4e580cf9ed
fix compile
2014-09-10 15:11:35 -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
41e6aad693
Avoid repeated adds and ensure correct round-trip result.
2014-09-09 21:57:46 -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
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
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
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
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
Jorge Rodriguez
75bdd2da83
Fix malloc context and whitespace.
2014-09-06 08:48:46 -07:00
Sean Barrett
aee30095c7
refactor internal interfaces to avoid passing things multiple times;
...
finish prepping 'stbir__info' even before calculate_memory;
get rid of 'noinfo' functions since now calculate_memory doesn't need 'em;
add new binary-searched sRGB function (untested)
2014-09-01 16:52:04 -07:00
Sean Barrett
732fec68ee
tweak new API, get it partly working
2014-08-31 08:55:41 -07:00
Sean Barrett
664d8961f5
new API partially in-use
2014-08-31 08:34:05 -07:00
Sean Barrett
2549d8156e
in-progress refactoring
2014-08-31 07:23:34 -07:00
Sean Barrett
6ef563d089
rename to stb_image_resize.h
2014-08-18 09:12:59 -07:00
Sean Barrett
eb0781fda0
add comments describing the purpose of the s,t-rectangle tests
2014-08-18 09:01:33 -07:00
Sean Barrett
9ba3dc1fc5
make resample tests work in VC6
2014-08-18 08:56:44 -07:00
Jorge Rodriguez
1353909477
Allow user to force the alpha channel to be handled as a linear value even if the color channels are sRGB.
2014-08-12 13:37:06 -07:00
Jorge Rodriguez
bbc340d481
Support different edge behavior on vertical and horizontal axis.
2014-08-12 12:22:38 -07:00
Jorge Rodriguez
6ae729d61a
Four new tests of subpixel stuff.
2014-08-12 12:15:12 -07:00
Jorge Rodriguez
45fa6ec900
Update test cases for premul channel -1 meaning don't do any premul handling, fix another no-more-advanced.
2014-08-11 12:38:27 -07:00
Jorge Rodriguez
e75ed1d381
Update test cases for no more advanced API.
2014-08-11 12:21:55 -07:00
Jorge Rodriguez
d75488b0e8
Do the multiply inline, it should be a tad faster and not corrupt our data.
2014-07-31 19:00:48 -07:00
Jorge Rodriguez
13acfca829
I had the whole premultiply thing backwards.
2014-07-31 18:46:00 -07:00
Jorge Rodriguez
21c7c8f5d9
Another stab at the api, offering classes of functions for different common tasks.
2014-07-31 18:04:57 -07:00
Jorge Rodriguez
8063ea0952
Specify a channel as having premultiplied alpha and use it to un-premultiply all other channels before resampling.
2014-07-31 17:20:00 -07:00
Jorge Rodriguez
daf325dc03
Sub pixel source area test cases. No problems.
2014-07-31 16:31:45 -07:00
Jorge Rodriguez
aae1c7ca41
ZOOM AND ENHANCE!
2014-07-31 15:16:36 -07:00
Jorge Rodriguez
35cb95b803
Allow for specifying a sub-region of the source image to use. Downsampling only, currently.
2014-07-31 00:39:33 -07:00
Jorge Rodriguez
fdc979e48b
Some minor ports for Linux. No idea how it worked at all in Windows with STB_RESIZE_IMPLEMENTATION instead of STB_RESAMPLE_IMPLEMENTATION.
2014-07-30 17:30:25 -07:00
Jorge Rodriguez
c5de2f3298
Test channels.
2014-07-30 09:42:12 -07:00
Jorge Rodriguez
985ac75251
When doing a perfect po2 nearest neighbor downsample don't allow -0.5 and 0.5 to both contribute to a texel or you'll get a double tap.
2014-07-30 09:27:42 -07:00
Jorge Rodriguez
c2449acc3e
Tests for edge behavior
2014-07-30 09:14:38 -07:00
Jorge Rodriguez
59cb71ea18
Fix float conversion.
2014-07-30 08:47:55 -07:00
Jorge Rodriguez
6625259959
Try to keep integer precision by briefly casting to double while decoding and encoding.
2014-07-30 01:18:23 -07:00
