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