/* * libpipi Pathetic image processing interface library * Copyright (c) 2004-2008 Sam Hocevar * All Rights Reserved * * $Id$ * * This library is free software. It comes without any warranty, to * the extent permitted by applicable law. You can redistribute it * and/or modify it under the terms of the Do What The Fuck You Want * To Public License, Version 2, as published by Sam Hocevar. See * http://sam.zoy.org/wtfpl/COPYING for more details. */ /* * rgb.c: RGB combining function */ #include "config.h" #include #include "pipi.h" #include "pipi_internals.h" pipi_image_t *pipi_rgb(pipi_image_t *i1, pipi_image_t *i2, pipi_image_t *i3) { pipi_image_t *dst; pipi_pixels_t *i1p, *i2p, *i3p, *dstp; float *i1data, *i2data, *i3data, *dstdata; int x, y, w, h; if(i1->w != i2->w || i1->h != i2->h || i1->w != i3->w || i1->h != i3->h) return NULL; w = i1->w; h = i1->h; dst = pipi_new(w, h); dstp = pipi_get_pixels(dst, PIPI_PIXELS_RGBA_F); dstdata = (float *)dstp->pixels; i1p = pipi_get_pixels(i1, PIPI_PIXELS_Y_F); i1data = (float *)i1p->pixels; i2p = pipi_get_pixels(i2, PIPI_PIXELS_Y_F); i2data = (float *)i2p->pixels; i3p = pipi_get_pixels(i3, PIPI_PIXELS_Y_F); i3data = (float *)i3p->pixels; for(y = 0; y < h; y++) { for(x = 0; x < w; x++) { dstdata[4 * (y * w + x)] = i1data[y * w + x]; dstdata[4 * (y * w + x) + 1] = i2data[y * w + x]; dstdata[4 * (y * w + x) + 2] = i3data[y * w + x]; dstdata[4 * (y * w + x) + 3] = 1.0; } } return dst; } pipi_image_t *pipi_red(pipi_image_t *src) { pipi_image_t *dst; pipi_pixels_t *srcp, *dstp; float *srcdata, *dstdata; int x, y, w, h; w = src->w; h = src->h; dst = pipi_new(w, h); dstp = pipi_get_pixels(dst, PIPI_PIXELS_Y_F); dstdata = (float *)dstp->pixels; srcp = pipi_get_pixels(src, PIPI_PIXELS_RGBA_F); srcdata = (float *)srcp->pixels; for(y = 0; y < h; y++) for(x = 0; x < w; x++) dstdata[y * w + x] = srcdata[4 * (y * w + x)]; return dst; } pipi_image_t *pipi_green(pipi_image_t *src) { pipi_image_t *dst; pipi_pixels_t *srcp, *dstp; float *srcdata, *dstdata; int x, y, w, h; w = src->w; h = src->h; dst = pipi_new(w, h); dstp = pipi_get_pixels(dst, PIPI_PIXELS_Y_F); dstdata = (float *)dstp->pixels; srcp = pipi_get_pixels(src, PIPI_PIXELS_RGBA_F); srcdata = (float *)srcp->pixels; for(y = 0; y < h; y++) for(x = 0; x < w; x++) dstdata[y * w + x] = srcdata[4 * (y * w + x) + 1]; return dst; } pipi_image_t *pipi_blue(pipi_image_t *src) { pipi_image_t *dst; pipi_pixels_t *srcp, *dstp; float *srcdata, *dstdata; int x, y, w, h; w = src->w; h = src->h; dst = pipi_new(w, h); dstp = pipi_get_pixels(dst, PIPI_PIXELS_Y_F); dstdata = (float *)dstp->pixels; srcp = pipi_get_pixels(src, PIPI_PIXELS_RGBA_F); srcdata = (float *)srcp->pixels; for(y = 0; y < h; y++) for(x = 0; x < w; x++) dstdata[y * w + x] = srcdata[4 * (y * w + x) + 2]; return dst; }