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/* |
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* libpipi Proper image processing implementation library |
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* Copyright (c) 2004-2008 Sam Hocevar <sam@zoy.org> |
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* All Rights Reserved |
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* |
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* $Id$ |
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* |
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* This library is free software. It comes without any warranty, to |
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* the extent permitted by applicable law. You can redistribute it |
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* and/or modify it under the terms of the Do What The Fuck You Want |
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* To Public License, Version 2, as published by Sam Hocevar. See |
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* http://sam.zoy.org/wtfpl/COPYING for more details. |
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*/ |
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/* |
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* test.c: my repository of test functions |
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*/ |
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#include "config.h" |
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#include "common.h" |
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#include <stdlib.h> |
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#include <string.h> |
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#include "pipi.h" |
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#include "pipi_internals.h" |
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void pipi_test(pipi_image_t *img) |
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{ |
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pipi_pixels_t *pixels; |
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float *data; |
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int x, y; |
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pixels = pipi_getpixels(img, PIPI_PIXELS_RGBA_F); |
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data = (float *)pixels->pixels; |
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for(y = 0; y < img->h; y++) |
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{ |
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for(x = 0; x < img->w; x++) |
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{ |
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double r = 0, g = 0, b = 0; |
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r = data[(y * img->w + x) * 4]; |
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g = data[(y * img->w + x) * 4 + 1]; |
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b = data[(y * img->w + x) * 4 + 2]; |
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if(r + g + b == 0) |
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r = g = b = 1. / 3; |
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else if(r + g + b < 1.) |
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{ |
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double d = (1. - r - g - b) / 3; |
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r += d; g += d; b += d; |
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} |
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else if(2. - r + g - b < 1.) |
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{ |
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double d = (-1. + r - g + b) / 3; |
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r -= d; g += d; b -= d; |
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} |
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else if(2. + r - g - b < 1.) |
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{ |
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double d = (-1. - r + g + b) / 3; |
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r += d; g -= d; b -= d; |
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} |
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data[(y * img->w + x) * 4] = r; |
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data[(y * img->w + x) * 4 + 1] = g; |
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data[(y * img->w + x) * 4 + 2] = b; |
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} |
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} |
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} |
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