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/*
#
# File : use_draw_gradient.cpp
# ( C++ source file )
#
# Description : Example of use for the CImg plugin 'plugins/draw_gradient.h'.
# This file is a part of the CImg Library project.
# ( http://cimg.eu )
#
# Copyright : Jerome Boulanger
# ( http://www.ricam.oeaw.ac.at/people/page.cgi?firstn=Jerome;lastn=Boulanger )
#
# License : CeCILL v2.0
# ( http://www.cecill.info/licences/Licence_CeCILL_V2-en.html )
#
# This software is governed by the CeCILL license under French law and
# abiding by the rules of distribution of free software. You can use,
# modify and/ or redistribute the software under the terms of the CeCILL
# license as circulated by CEA, CNRS and INRIA at the following URL
# "http://www.cecill.info".
#
# As a counterpart to the access to the source code and rights to copy,
# modify and redistribute granted by the license, users are provided only
# with a limited warranty and the software's author, the holder of the
# economic rights, and the successive licensors have only limited
# liability.
#
# In this respect, the user's attention is drawn to the risks associated
# with loading, using, modifying and/or developing or reproducing the
# software by the user in light of its specific status of free software,
# that may mean that it is complicated to manipulate, and that also
# therefore means that it is reserved for developers and experienced
# professionals having in-depth computer knowledge. Users are therefore
# encouraged to load and test the software's suitability as regards their
# requirements in conditions enabling the security of their systems and/or
# data to be ensured and, more generally, to use and operate it in the
# same conditions as regards security.
#
# The fact that you are presently reading this means that you have had
# knowledge of the CeCILL license and that you accept its terms.
#
*/
#define cimg_plugin "plugins/draw_gradient.h"
#include "CImg.h"
using namespace cimg_library;
// Main procedure
//---------------
int main(int argc,char **argv) {
// Read command line arguments
//----------------------------
cimg_usage("Example of the use of draw_gradient CImg plugin");
const char *const file_i = cimg_option("-i",(char*)0,"Input image");
const int shape = cimg_option("-s",1,"shape [0,6]");
const int profile = cimg_option("-p",0,"profile [0,7]");
// Define an image
CImg<unsigned char> img;
if (file_i) img.load(file_i).resize(-100,-100,-100,3);
else img.assign(300,200,1,3,0);
// Define the color of the gradient
CImg<unsigned char> col(3);
const unsigned char col1[3] = { 0,0,255 }, col2[3] = { 255,255,255 };
CImgDisplay disp(img,"Click and drag to create color gradient",0);
while (!disp.is_closed() && !disp.key()) {
// Get a vector direction from the user.
const CImg<int> selection = img.get_select(disp,1);
// Draw a gradient using the selected coordinated.
col.rand(100,255);
printf("Gradient with %s from color (%d,%d,%d) to (%d,%d,%d)\n",
CImg<>::get_gradient_str(shape,profile),col(0),col(1),col(2),col1[0],col1[1],col2[2]);
img.draw_gradient(selection(0),selection(1),selection(3),selection(4),
col.data(),col1,shape,profile,.7f).display(disp);
}
// color 0 to transparency
if (file_i) img.load(file_i).resize(-100,-100,-100,3);
else img.assign(300,200,1,3,0);
img.display(disp);
disp.show().flush();
while (!disp.is_closed() && !disp.key()) {
// Get a vector direction from the user.
const CImg<int> selection = img.get_select(disp,1);
// Draw a gradient using the selected coordinated.
col.rand(100,255);
printf("Gradient with %s from color (%d,%d,%d) to transparency\n",
CImg<>::get_gradient_str(shape,profile),col(0),col(1),col(2));
img.draw_gradient(selection(0),selection(1),selection(3),selection(4),
col.data(),0,shape,profile,.7f).display(disp);
}
// transparency to color 1
if (file_i) img.load(file_i).resize(-100,-100,-100,3);
else img.assign(300,200,1,3,0);
img.display(disp);
disp.show().flush();
while (!disp.is_closed() && !disp.key()) {
// Get a vector direction from the user.
const CImg<int> selection = img.get_select(disp,1);
// Draw a gradient using the selected coordinated.
col.rand(100,255);
printf("Gradient with %s from transparency to color (%d,%d,%d)\n",
CImg<>::get_gradient_str(shape,profile),col(0),col(1),col(2));
img.draw_gradient(selection(0),selection(1),selection(3),selection(4),
0,col.data(),shape,profile,.7f).display(disp);
}
// random
if (file_i) img.load(file_i).resize(-100,-100,-100,3);
else img.assign(300,200,1,3,0);
disp.set_title("Random color gradient").show().flush();
CImg<unsigned char> visu(img);
visu.display(disp);
while (!disp.is_closed() && !disp.key()) {
const int
x = (int)(cimg::rand()*visu.width()),
y = (int)(cimg::rand()*visu.height()),
rx = (int)((cimg::rand()*25 + 5)*(cimg::rand()>.5?-1:1)),
ry = (int)((cimg::rand()*25 + 5)*(cimg::rand()>.5?-1:1));
col.rand(64,255);
img.draw_gradient(x,y,x + rx,y + ry,col.data(),0,shape,profile,.4f);
visu = img;
visu.draw_text(10,10,"%.1ffps",col2,0,1,13,disp.frames_per_second()).display(disp);
if (disp.is_resized()) disp.resize();
}
return 0;
}
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