mirror of https://github.com/edeproject/ede.git
81 lines
1.7 KiB
C++
81 lines
1.7 KiB
C++
/*
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* $Id$
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*
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* Desktop configuration tool
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* Part of Equinox Desktop Environment (EDE).
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* Copyright (c) 2009 EDE Authors.
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*
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* This program is licensed under terms of the
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* GNU General Public License version 2 or newer.
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* See COPYING for details.
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*/
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#include <string.h>
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#include <stdio.h>
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#include <FL/Fl_RGB_Image.H>
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#include "BoxBlur.h"
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typedef unsigned char uchar;
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typedef unsigned int uint;
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static int pixel_address(int x, int y, int w) {
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return y * w + x;
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}
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static uint get_pixel(uint* data, int x, int y, int w) {
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int p = pixel_address(x, y, w);
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if(p < 0)
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p = 0;
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if(p > w - 1)
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p = w - 1;
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return data[p];
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}
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Fl_RGB_Image* box_blur(Fl_RGB_Image* src) {
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int radius = 4;
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uint* orig = (uint*)src->data()[0];
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uchar* buf = new uchar[src->w() * src->h() * src->d()];
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memcpy(buf, src->array, src->w() * src->h() * src->d());
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uint* bufptr = (uint*)buf;
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for(int x = 4; x < src->w() - 1; x++) {
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for(int y = 4; y < src->h() - 1; y+= src->d()) {
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int count = 0;
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uint rsum = 0, gsum = 0, bsum = 0, asum = 0;
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for(int nx = x - radius; nx < x + radius; nx++) {
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for(int ny = y - radius; ny < y + radius; ny++) {
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/* get pixel from x,y */
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uint pix = get_pixel(bufptr, nx, ny, src->w()/src->d());
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uchar* ptr = (uchar*)&pix;
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rsum += *ptr++;
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gsum += *ptr++;
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bsum += *ptr++;
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asum += *ptr;
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count += 1;
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}
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}
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/* set pixel at x,y */
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uint tmp;
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uchar *tc = (uchar*)&tmp;
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*tc++ = rsum / count;
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*tc++ = gsum / count;
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*tc++ = bsum / count;
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*tc = asum / count;
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bufptr[pixel_address(x, y, src->w()/src->d())] = tmp;
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}
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}
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if(src->alloc_array)
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delete [] (uchar*)src->array;
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src->array = buf;
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src->alloc_array = 1;
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return src;
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}
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