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Diffstat (limited to 'leptonica/prog/dither_reg.c')
-rw-r--r-- | leptonica/prog/dither_reg.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/leptonica/prog/dither_reg.c b/leptonica/prog/dither_reg.c new file mode 100644 index 00000000..67eee053 --- /dev/null +++ b/leptonica/prog/dither_reg.c @@ -0,0 +1,86 @@ +/*====================================================================* + - Copyright (C) 2001 Leptonica. All rights reserved. + - + - Redistribution and use in source and binary forms, with or without + - modification, are permitted provided that the following conditions + - are met: + - 1. Redistributions of source code must retain the above copyright + - notice, this list of conditions and the following disclaimer. + - 2. Redistributions in binary form must reproduce the above + - copyright notice, this list of conditions and the following + - disclaimer in the documentation and/or other materials + - provided with the distribution. + - + - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY + - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY + - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + *====================================================================*/ + +/* + * dither_reg.c + * + * Test dithering from 8 bpp to 1 bpp and 2 bpp. + */ + +#ifdef HAVE_CONFIG_H +#include <config_auto.h> +#endif /* HAVE_CONFIG_H */ + +#include "allheaders.h" + +int main(int argc, + char **argv) +{ +PIX *pix, *pixs, *pix1, *pix2; +L_REGPARAMS *rp; + + if (regTestSetup(argc, argv, &rp)) + return 1; + + pix = pixRead("test8.jpg"); + pixs = pixGammaTRC(NULL, pix, 1.3, 0, 255); /* gamma of 1.3, for fun */ + + /* Dither to 1 bpp */ + pix1 = pixDitherToBinary(pixs); + regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 0 */ + pixDisplayWithTitle(pix1, 0, 0, NULL, rp->display); + pixDestroy(&pix1); + + /* Dither to 2 bpp, with colormap */ + pix1 = pixDitherTo2bpp(pixs, 1); + regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 1 */ + pixDisplayWithTitle(pix1, 400, 0, NULL, rp->display); + + /* Dither to 2 bpp, without colormap */ + pix2 = pixDitherTo2bpp(pixs, 0); + regTestWritePixAndCheck(rp, pix2, IFF_PNG); /* 2 */ + pixDisplayWithTitle(pix2, 800, 0, NULL, rp->display); + regTestComparePix(rp, pix1, pix2); /* 3 */ + pixDestroy(&pix1); + pixDestroy(&pix2); + + /* Dither 2x upscale to 1 bpp */ + pix1 = pixScaleGray2xLIDither(pixs); + regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 4 */ + pixDisplayWithTitle(pix1, 0, 400, NULL, rp->display); + pixDestroy(&pix1); + + /* Dither 4x upscale to 1 bpp */ + pix1 = pixScaleGray4xLIDither(pixs); + regTestWritePixAndCheck(rp, pix1, IFF_PNG); /* 5 */ + pixDisplayWithTitle(pix1, 700, 400, NULL, rp->display); + pixDestroy(&pix1); + + pixDestroy(&pix); + pixDestroy(&pixs); + return regTestCleanup(rp); +} + |