Jorge Rodriguez
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daf325dc03
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Sub pixel source area test cases. No problems.
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2014-07-31 16:31:45 -07:00 |
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Jorge Rodriguez
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aae1c7ca41
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ZOOM AND ENHANCE!
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2014-07-31 15:16:36 -07:00 |
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Jorge Rodriguez
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1b2d104e00
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Some error conditions.
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2014-07-31 00:52:03 -07:00 |
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Jorge Rodriguez
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35cb95b803
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Allow for specifying a sub-region of the source image to use. Downsampling only, currently.
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2014-07-31 00:39:33 -07:00 |
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Jorge Rodriguez
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52ac93225a
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C<99 ports
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2014-07-30 17:33:47 -07:00 |
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Jorge Rodriguez
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fdc979e48b
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Some minor ports for Linux. No idea how it worked at all in Windows with STB_RESIZE_IMPLEMENTATION instead of STB_RESAMPLE_IMPLEMENTATION.
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2014-07-30 17:30:25 -07:00 |
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Jorge Rodriguez
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c5de2f3298
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Test channels.
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2014-07-30 09:42:12 -07:00 |
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Jorge Rodriguez
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985ac75251
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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.
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2014-07-30 09:27:42 -07:00 |
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Jorge Rodriguez
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c2449acc3e
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Tests for edge behavior
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2014-07-30 09:14:38 -07:00 |
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Jorge Rodriguez
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59cb71ea18
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Fix float conversion.
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2014-07-30 08:47:55 -07:00 |
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Jorge Rodriguez
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6625259959
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Try to keep integer precision by briefly casting to double while decoding and encoding.
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2014-07-30 01:18:23 -07:00 |
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Jorge Rodriguez
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11897fbf96
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More fixing shorts.
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2014-07-30 00:34:25 -07:00 |
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Jorge Rodriguez
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1fcbe0daaf
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Fix shorts. Add test cases for shorts.
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2014-07-30 00:16:13 -07:00 |
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Jorge Rodriguez
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7ead9a748d
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Fix. Ring buffers are a height value.
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2014-07-29 23:09:41 -07:00 |
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Jorge Rodriguez
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043fa28c11
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Same deal with height.
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2014-07-29 23:02:56 -07:00 |
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Jorge Rodriguez
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ebe0473d8b
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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.
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2014-07-29 22:50:06 -07:00 |
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Jorge Rodriguez
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68f93b72d5
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Update documentation and add helper functions.
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2014-07-29 20:18:28 -07:00 |
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Jorge Rodriguez
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5b40906271
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My perf testing code.
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2014-07-29 17:44:45 -07:00 |
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Jorge Rodriguez
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d96c97298c
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This is still faster than the function pointer solution, and neater.
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2014-07-29 16:22:22 -07:00 |
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Jorge Rodriguez
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3a3e06029e
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This is definitely faster than the function pointer solution.
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2014-07-29 12:11:03 -07:00 |
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Jorge Rodriguez
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9bd5abb52d
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Both versions run within the margin of error on my machine so we'll go with the simpler one.
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2014-07-29 11:44:32 -07:00 |
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Jorge Rodriguez
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5dff80ed31
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Trying some different strategies for optimizing the decoder. The code in #ifdef 1 is slightly faster by my measurements, but a whole lot uglier.
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2014-07-29 11:39:42 -07:00 |
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Jorge Rodriguez
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05f775e977
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Merge branch 'master' of https://github.com/BSVino/stb
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2014-07-29 00:33:54 -07:00 |
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Jorge Rodriguez
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1fcf30ada0
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Fix a math error.
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2014-07-29 00:33:29 -07:00 |
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Jorge Rodriguez
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e2ac4f6505
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More resample ideas
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2014-07-27 12:05:17 -07:00 |
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Jorge Rodriguez
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ef3a460ec4
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Some better looking horners save another multiplication.
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2014-07-27 00:55:47 -07:00 |
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Jorge Rodriguez
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7d47582578
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Support for 16 and 32 bit integer images, and float images.
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2014-07-27 00:09:22 -07:00 |
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Jorge Rodriguez
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6c8cac0a66
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Support for sRGB color space.
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2014-07-26 23:44:45 -07:00 |
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Jorge Rodriguez
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41dc4c476c
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In some situations with certain filter kernels with negative values it's possible to generate valid results > 1.0, so saturate it before we write it to make sure it doesn't overflow. Also fix incorrect filter radius while downsampling.
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2014-07-26 22:49:56 -07:00 |
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Jorge Rodriguez
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af1ed58f51
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Add wrap, fix reflect so it doesn't wrap.
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2014-07-26 19:30:13 -07:00 |
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Jorge Rodriguez
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8723567439
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Add edge reflect mode.
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2014-07-26 19:11:02 -07:00 |
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Jorge Rodriguez
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6cd81d4dd5
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Put the polynomials in horner form to save a multiplication.
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2014-07-26 15:36:15 -07:00 |
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Jorge Rodriguez
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fb2f8df5cc
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Add mitchell filter.
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2014-07-26 15:06:31 -07:00 |
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Jorge Rodriguez
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69af963c42
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Add catmull rom filter. Also, move the debug asserts for values <= 1 to the very end of the process. This will make these bugs a lot harder to find, but because some filter kernels have negative values it's possible for the buffers to have values > 1 up until the point where it's converted back to an int.
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2014-07-26 14:52:28 -07:00 |
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Jorge Rodriguez
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12acf87eec
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When downsampling start the buffer loop at -filter_texel_margin to make sure that all contributors get their taps in at the ring buffer.
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2014-07-26 13:56:23 -07:00 |
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Jorge Rodriguez
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155c71fb90
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Reorder these loops because I think we get a cache win if we write the entire ring buffer entry at once.
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2014-07-26 13:12:48 -07:00 |
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Jorge Rodriguez
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01fb58d6b4
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Add a bicubic filter.
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2014-07-26 13:07:04 -07:00 |
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Jorge Rodriguez
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a95da9ee1d
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Unroll the multiply-add loops. At the cost of a function pointer dereference we get a whole lot of conditionals eliminated. Should be a solid win once the debug asserts are gone.
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2014-07-26 12:04:39 -07:00 |
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Jorge Rodriguez
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7abd4ccf34
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Support for filters with larger support. Initial support for edge behavior.
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2014-07-26 11:51:02 -07:00 |
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Jorge Rodriguez
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62ff271c7a
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I put it in the to do list and now I can close my browser tab.
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2014-07-25 00:08:23 -07:00 |
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Jorge Rodriguez
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81c1ddf110
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Keeping a list of suggestions so I don't forget them.
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2014-07-25 00:00:40 -07:00 |
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Jorge Rodriguez
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27926e78b8
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Make consistent tests for whether we're doing upsampling or downsampling of width and height. Don't request memory for horizontal buffer or encode buffer if we don't need it.
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2014-07-24 23:50:14 -07:00 |
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Jorge Rodriguez
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666c025710
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Fix non uniform scaling where out_w < in_w && out_h > in_h.
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2014-07-24 23:32:25 -07:00 |
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Jorge Rodriguez
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736596ba09
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Fix non uniform scaling where out_w > in_w && out_h < in_h.
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2014-07-24 23:27:29 -07:00 |
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Jorge Rodriguez
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178e301ea4
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Fix upsampling, avoid dereferencing in an inner loop.
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2014-07-24 22:54:35 -07:00 |
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Jorge Rodriguez
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dbb7480f12
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Fix nonuniform downsampling.
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2014-07-24 22:30:35 -07:00 |
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Jorge Rodriguez
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fa69bc8551
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Basic downsampling algorithm works for uniform sampling.
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2014-07-24 22:09:08 -07:00 |
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Jorge Rodriguez
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297266b27b
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Starting to implement downsampling.
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2014-07-24 19:10:45 -07:00 |
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Jorge Rodriguez
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7d8faf5727
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Remove unused functions.
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2014-07-24 15:02:54 -07:00 |
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Jorge Rodriguez
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8ac052ac8a
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Avoid gaps between box filter kernels.
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2014-07-24 15:02:39 -07:00 |
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