1ff231b9f7
Change _C pixel format suffixes into _U8 for more clarity.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3342 92316355-f0b4-4df1-b90c-862c8a59935f
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bb926c7a95
Rename pipi_getpixel into pipi_get_pixels.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3340 92316355-f0b4-4df1-b90c-862c8a59935f
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4bfa33f1b9
Start writing Visual Studio projects.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2904 92316355-f0b4-4df1-b90c-862c8a59935f
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0eb36a6225
Support C99 types on Win32 through the same hacks as in libcaca.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2902 92316355-f0b4-4df1-b90c-862c8a59935f
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36438eed8f
Fix headers.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2844 92316355-f0b4-4df1-b90c-862c8a59935f
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6f49c4d859
* ordered.c: r means radius, not diameter.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2813 92316355-f0b4-4df1-b90c-862c8a59935f
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bd54059e60
* Add a scale parameter to pipi_dither_ordered_ext().
* Reimplement pipi_dither_halftone() using pipi_dither_ordered_ext().
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2812 92316355-f0b4-4df1-b90c-862c8a59935f
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4fefa85cd9
* ordered.c: allow to rotate the dither pattern, using nearest-neighbour
rotation interpolation.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2811 92316355-f0b4-4df1-b90c-862c8a59935f
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3dba2d0198
* Add pipi_order, to transform any image into an ordered dithering matrix.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2790 92316355-f0b4-4df1-b90c-862c8a59935f
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645169e3b1
* Add the "halftone" dithering method, which uses classical halftone (aka.
clustered ordered dither). Halftoning levels aren't terribly well
supported yet, though.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2761 92316355-f0b4-4df1-b90c-862c8a59935f
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44c9b8e15d
* Get rid of the specific error diffusion functions, since our stock kernels
work perfectly well.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2759 92316355-f0b4-4df1-b90c-862c8a59935f
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90c7527281
* Add pipi_dither_ediff(), a generic error diffusion dithering algorithm
that uses an image as the error diffusion kernel.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2758 92316355-f0b4-4df1-b90c-862c8a59935f
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b40fc1b330
* atkinson.c: implement Atkinson dithering.
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25cdf35a86
* jajuni.c: add Jarvis-Judice-Ninke dithering. It's a Floyd-Steinberg-like
error diffusion method that has fewer high resolution structural artifacts
at the expense of resolution.
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b5500986b2
* floydsteinberg.c: minor optimisation in the FStein error propagation.
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eb9a270380
* pipi_dither_ordered() now takes two arguments; any image can be used as
the ordered dithering matrix. To get the old behaviour, use:
pipi image.png pipi:bayer8 --dither ordered out.png
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2696 92316355-f0b4-4df1-b90c-862c8a59935f
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53268650a7
* dbs.c: generate the initial halftone using random dithering instead of
Floyd-Steinberg in order to avoid the energy level getting locally stuck
around error diffusion structure artifacts.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2672 92316355-f0b4-4df1-b90c-862c8a59935f
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0eda956bfc
* random.c: implement random dithering using a deterministic pseudo-RNG.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2671 92316355-f0b4-4df1-b90c-862c8a59935f
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18dd51e1a5
* Dithering algorithms no longer modify the original image.
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41efcdecc0
* Prefix dithering functions with _dither_ to avoid namespace cluttering.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2666 92316355-f0b4-4df1-b90c-862c8a59935f
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6a3309663e
* ordered.c: implement Bayer dithering (pretty trivial).
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a6dcd80490
* dbs.c: optimise DBS by ignoring 16x16 cells that had no pixel changes for
the last two iterations.
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2a3c7ca990
* dbs.c: improve the DBS human visual system kernel by adding two Gaussian
kernels.
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87f8e922ab
* Error diffusion methods now support either raster or serpentine scan.
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302ce37f8e
* ostromoukhov.c: Ostromoukhov's simple error diffusion algorithm.
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2182fdfdbf
* floydsteinberg.c: perform Floyd-Steinberg dithering on a serpentine path.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2653 92316355-f0b4-4df1-b90c-862c8a59935f
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628c2618da
* dbs.c: new dithering function: Direct Binary Search. One of the best
dithering methods as of today, though extremely slow.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2651 92316355-f0b4-4df1-b90c-862c8a59935f
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1408cff41d
* Add Floyd-Steinberg grayscale dithering.
git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2637 92316355-f0b4-4df1-b90c-862c8a59935f
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sam