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Author	SHA1	Message	Date
Jorge Rodriguez	d96c97298c	This is still faster than the function pointer solution, and neater.	2014-07-29 16:22:22 -07:00
Jorge Rodriguez	3a3e06029e	This is definitely faster than the function pointer solution.	2014-07-29 12:11:03 -07:00
Jorge Rodriguez	9bd5abb52d	Both versions run within the margin of error on my machine so we'll go with the simpler one.	2014-07-29 11:44:32 -07:00
Jorge Rodriguez	5dff80ed31	Trying some different strategies for optimizing the decoder. The code in #ifdef 1 is slightly faster by my measurements, but a whole lot uglier.	2014-07-29 11:39:42 -07:00
Jorge Rodriguez	05f775e977	Merge branch 'master' of https://github.com/BSVino/stb	2014-07-29 00:33:54 -07:00
Jorge Rodriguez	1fcf30ada0	Fix a math error.	2014-07-29 00:33:29 -07:00
Jorge Rodriguez	e2ac4f6505	More resample ideas	2014-07-27 12:05:17 -07:00
Jorge Rodriguez	ef3a460ec4	Some better looking horners save another multiplication.	2014-07-27 00:55:47 -07:00
Jorge Rodriguez	7d47582578	Support for 16 and 32 bit integer images, and float images.	2014-07-27 00:09:22 -07:00
Jorge Rodriguez	6c8cac0a66	Support for sRGB color space.	2014-07-26 23:44:45 -07:00
Jorge Rodriguez	41dc4c476c	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.	2014-07-26 22:49:56 -07:00
Jorge Rodriguez	af1ed58f51	Add wrap, fix reflect so it doesn't wrap.	2014-07-26 19:30:13 -07:00
Jorge Rodriguez	8723567439	Add edge reflect mode.	2014-07-26 19:11:02 -07:00
Jorge Rodriguez	6cd81d4dd5	Put the polynomials in horner form to save a multiplication.	2014-07-26 15:36:15 -07:00
Jorge Rodriguez	fb2f8df5cc	Add mitchell filter.	2014-07-26 15:06:31 -07:00
Jorge Rodriguez	69af963c42	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.	2014-07-26 14:52:28 -07:00
Jorge Rodriguez	12acf87eec	When downsampling start the buffer loop at -filter_texel_margin to make sure that all contributors get their taps in at the ring buffer.	2014-07-26 13:56:23 -07:00
Jorge Rodriguez	155c71fb90	Reorder these loops because I think we get a cache win if we write the entire ring buffer entry at once.	2014-07-26 13:12:48 -07:00
Jorge Rodriguez	01fb58d6b4	Add a bicubic filter.	2014-07-26 13:07:04 -07:00
Jorge Rodriguez	a95da9ee1d	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.	2014-07-26 12:04:39 -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	62ff271c7a	I put it in the to do list and now I can close my browser tab.	2014-07-25 00:08:23 -07:00
Jorge Rodriguez	81c1ddf110	Keeping a list of suggestions so I don't forget them.	2014-07-25 00:00:40 -07:00
Jorge Rodriguez	27926e78b8	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.	2014-07-24 23:50:14 -07:00
Jorge Rodriguez	666c025710	Fix non uniform scaling where out_w < in_w && out_h > in_h.	2014-07-24 23:32:25 -07:00
Jorge Rodriguez	736596ba09	Fix non uniform scaling where out_w > in_w && out_h < in_h.	2014-07-24 23:27:29 -07:00
Jorge Rodriguez	178e301ea4	Fix upsampling, avoid dereferencing in an inner loop.	2014-07-24 22:54:35 -07:00
Jorge Rodriguez	dbb7480f12	Fix nonuniform downsampling.	2014-07-24 22:30:35 -07:00
Jorge Rodriguez	fa69bc8551	Basic downsampling algorithm works for uniform sampling.	2014-07-24 22:09:08 -07:00
Jorge Rodriguez	297266b27b	Starting to implement downsampling.	2014-07-24 19:10:45 -07:00
Jorge Rodriguez	7d8faf5727	Remove unused functions.	2014-07-24 15:02:54 -07:00
Jorge Rodriguez	8ac052ac8a	Avoid gaps between box filter kernels.	2014-07-24 15:02:39 -07:00
Jorge Rodriguez	9e726bb3e4	The vertical resampling pass. Now all elements of the upscale algorithm are in place.	2014-07-24 14:20:18 -07:00
Jorge Rodriguez	152965f334	Decode enough scanlines into a ring buffer to make sure that we have enough source scanlines to do a vertical sampling.	2014-07-24 01:04:22 -07:00
Jorge Rodriguez	158effb62a	More accurate names. Smaller size for contributors memory, more accurate to what's needed.	2014-07-23 23:08:06 -07:00
Jorge Rodriguez	855fb207be	Merge remote-tracking branch 'remotes/nothings/master'	2014-07-23 22:24:59 -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
Sean Barrett	ee8e926317	even more resampling notes	2014-07-22 12:45:24 -07:00
Sean Barrett	92b08aa98a	more resampling notes	2014-07-22 12:39:29 -07:00
Sean Barrett	6f779fb67a	whoops imageresampler link	2014-07-22 12:17:43 -07:00
Sean Barrett	9c9a68787d	imageresampler library reference	2014-07-22 12:16:11 -07:00
Sean Barrett	3e8a89cad1	more resampler notes	2014-07-22 11:57:46 -07:00
Sean Barrett	c27ccec436	resampler prototypes	2014-07-22 11:37:54 -07:00
Sean Barrett	63cce5c70a	created stb_resample_ideas.txt	2014-07-22 10:05:01 -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	c27c5b6fbe	There's really no point in returning the output buffer.	2014-07-21 15:36:43 -07:00
Jorge Rodriguez	d54e74092e	stb_resample initial implementation	2014-07-21 00:16:03 -07:00
Sean Barrett	bcefca10f7	fix bad fix in previous fix	2014-07-15 22:26:01 -07:00