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https://github.com/RfidResearchGroup/proxmark3.git
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iceman1001
40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
//-----------------------------------------------------------------------------
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// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// See LICENSE.txt for the text of the license.
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//-----------------------------------------------------------------------------
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// Image utilities
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//-----------------------------------------------------------------------------
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#ifndef IMGUTILS_H__
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#define IMGUTILS_H__
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#include <gd.h>
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/*
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* Converts a true color image to a palette image, using Floyd-Steinberg dithering.
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*
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* For color matching, this function uses the Euclidean distance between colors in the
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* YCbCr color space, which yields to better results than using sRGB directly.
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*
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* A comparison can be found at https://twitter.com/Socram4x8/status/1733157380097995205/photo/1.
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*/
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gdImagePtr img_palettize(gdImagePtr rgb, int *palette, int palette_size);
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/*
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* This function scales and crops the image to the given size.
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* Think of "background-size: cover" in CSS.
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*/
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gdImagePtr img_crop_to_fit(gdImagePtr orig, int width, int height);
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#endif
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