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197 Commits

Author SHA1 Message Date
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
5dfa79fb31 stride doesn't have to be multiples of pixels 2014-08-18 10:18:59 -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
Sean Barrett
14e8b66119 fix broken map generation 2014-08-17 21:08:43 -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
Sean Barrett
a0537bfd04 Allow compiling as C pre-C99 (don't rely on declare-anywhere) 2014-08-11 01:56:47 -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
Jorge Rodriguez
11897fbf96 More fixing shorts. 2014-07-30 00:34:25 -07:00
Jorge Rodriguez
1fcbe0daaf Fix shorts. Add test cases for shorts. 2014-07-30 00:16:13 -07:00
Jorge Rodriguez
7ead9a748d Fix. Ring buffers are a height value. 2014-07-29 23:09:41 -07:00
Jorge Rodriguez
043fa28c11 Same deal with height. 2014-07-29 23:02:56 -07:00
Jorge Rodriguez
ebe0473d8b Add a test suite to do a bunch of different resizes to find problems. One problem found was an incorrect calculation of texel support how many margin texels needed when downsampling. When downsampling we need to spread out the support of each contributing texel, so to compensate you need more margin texels. 2014-07-29 22:50:06 -07:00
Jorge Rodriguez
68f93b72d5 Update documentation and add helper functions. 2014-07-29 20:18:28 -07:00
Jorge Rodriguez
5b40906271 My perf testing code. 2014-07-29 17:44:45 -07:00
Jorge Rodriguez
6c8cac0a66 Support for sRGB color space. 2014-07-26 23:44:45 -07:00
Jorge Rodriguez
01fb58d6b4 Add a bicubic filter. 2014-07-26 13:07:04 -07:00
Jorge Rodriguez
7abd4ccf34 Support for filters with larger support. Initial support for edge behavior. 2014-07-26 11:51:02 -07:00
Jorge Rodriguez
297266b27b Starting to implement downsampling. 2014-07-24 19:10:45 -07:00
Jorge Rodriguez
55c5f0b3a0 Beginning of a more sophisticated resample algorithm, starting with calculating filter contributions per scan line. 2014-07-23 22:17:56 -07:00
Jorge Rodriguez
0155bd3ab6 We are going to support SRGB. 2014-07-21 19:51:11 -07:00
Jorge Rodriguez
ba861fa493 Allow specifying a stride. 2014-07-21 18:01:05 -07:00
Jorge Rodriguez
06b7b00696 It does nothing now but I want to support edge behavior in the future. 2014-07-21 16:14:32 -07:00
Jorge Rodriguez
d54e74092e stb_resample initial implementation 2014-07-21 00:16:03 -07:00
Sean Barrett
e454b82a78 remove tabs 2014-07-07 07:46:39 -07:00
Sean Barrett
816f31e9bc fixes and tests 2014-07-07 04:54:52 -07:00
Sean Barrett
4b590c0a62 first pass at stb-izing complete, now need to debug 2014-07-04 09:34:57 -07:00
Sean Barrett
88c99e47fb initial commit 2014-07-04 08:06:36 -07:00
Sean Barrett
b000f920ac update stb_image version number 2014-06-22 11:21:11 -07:00
Sean Barrett
2452f0002f Merge branch 'textedit' 2014-06-19 20:21:32 -07:00
Sean Barrett
d4d046be09 update version number 2014-06-19 20:21:08 -07:00
Sean Barrett
44c37c51c0 add testing project for stb_c_lexer.h 2014-06-19 19:56:11 -07:00
Sean Barrett
f5dfba0b8b Update stb_image test code to test loading with all channel counts (including 0), 
to avoid missing bugs like the recent TGA bug in the future. Doesn't check the
*results*, but tests that it doesn't crash or fail.
 2014-06-15 13:17:04 -07:00
Sean Barrett
2684499fce tweak textedit sample fix 2014-06-06 23:59:38 -07:00
Scott Graham
885b1b7ded fix textedit_sample a bit 2014-06-06 23:08:51 -07:00
Sean Barrett
c28ffbbf0d Change byte casts in stb_image.h that intentionally truncate to do so explicitly for MSVC runtime check compatibility 2014-06-06 10:15:30 -07:00
Sean Barrett
f54bc09e4f make header files visible in file list 2014-06-04 17:57:42 -07:00
Sean Barrett
b96edc012c Merge branch 'headerify' 
Conflicts:
	tests/stretch_test.dsp
 2014-06-03 08:51:40 -07:00
Sean Barrett
334cec8d8c Fix handling of iphone-procesed image to not accidentally appear corrupt (instead they just load wrong). 
Add a proper testing path to image test
 2014-06-03 08:45:34 -07:00
Sean Barrett
a57dfc50fc fix bugs in new stretchy buffer code, add stretchy buffer tests 2014-06-01 08:01:01 -07:00
Sean Barrett
037491ca45 Merge branch 'working' 2014-05-31 23:43:47 -07:00
Sean Barrett
4e8cade2cf move image_test into main tests directory 2014-05-31 13:46:13 -07:00
Sean Barrett
2bf4326350 cleanup runtime output/error detection of stb.h unit tests 2014-05-31 13:39:00 -07:00
Sean Barrett
666596ed89 untested rewrite of stretchy_buffer relying on implicit cast from void* 2014-05-31 13:00:39 -07:00
Sean Barrett
a7691e1510 check-in missing project file updates for stb_image.h usage 2014-05-31 06:31:27 -07:00
Sean Barrett
2514fbc2c7 more renaming 2014-05-31 05:38:26 -07:00
Sean Barrett
927b455d85 start converting stb_image.c to a .h file 2014-05-31 04:49:43 -07:00
Sean Barrett
7ed3bb26bb Merge branch 'working' 2014-05-30 14:25:49 -07:00
Sean Barrett
fcfcb9bb3f generate README.md in part by parsing libraries so that version numbers are in sync 2014-05-30 14:15:51 -07:00
Sean Barrett
9e566c8b31 trailing newline 2014-05-28 11:05:17 -07:00
Sean Barrett
42bd3e253b rename test files to be more meaningful 2014-05-27 23:13:34 -07:00
Sean Barrett
e63b3e0702 fix some stuff that used RAD types and so were totally broken, add a compile test/sample 2014-05-27 22:56:57 -07:00
Sean Barrett
1d2770394a rest of image-test case 2014-05-27 21:56:42 -07:00
Sean Barrett
fc0bfd1b71 fix some typos, add image test program 2014-05-27 21:38:43 -07:00
Sean Barrett
a8fbfd2cb3 stb_divide.h 2014-05-25 21:54:59 -07:00
Sean Barrett
eb62c741ea fixed warnings for stb_truetype (fixes all outstanding bug reports) 2014-05-25 20:56:24 -07:00
Sean Barrett
31897dfd7f compile tests for everything except textedit, both C and C++ 2014-05-25 20:10:17 -07:00
Sean Barrett
dc6adca82f vc6 project files for testing stb.h 2014-05-25 13:35:50 -07:00
Sean Barrett
e2caccb811 initial checkin 2014-05-25 10:18:03 -07:00