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/*
* matrix.cpp -- create the cover image
*
* (c) 2021 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
*/
#include <ImageMagick-7/Magick++.h>
#include <getopt.h>
#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <string>
class MatrixImage : public Magick::Image {
Magick::ColorRGB _schriftfarbe;
double _opacity_fade;
public:
double opacity_fade() const { return _opacity_fade; }
void opacity_fade(double of) { _opacity_fade = of; }
MatrixImage(Magick::Geometry& geometry, Magick::Color& color,
Magick::Color& schriftfarbe)
: Magick::Image(geometry, color), _schriftfarbe(schriftfarbe) {
_opacity_fade = 0.9;
strokeColor(schriftfarbe);
fillColor(schriftfarbe);
font("Courier");
}
void verticalline(double x, double scale, double startopacity);
void verticallines(double width, double scale, double startopacity);
};
void MatrixImage::verticalline(double x, double scale, double startopacity) {
std::vector<Magick::Drawable> objects_to_draw;
fontPointsize(20 * scale);
double heightstep = 16 * scale;
double r = (random() % 65525) / 65535.;
double initialheight = size().height() * (1 - 0.5 * r);
initialheight = heightstep * trunc(initialheight / heightstep);
double opacity = startopacity;
for (int i = 0; i < 20; i++) {
objects_to_draw.push_back(Magick::DrawableStrokeOpacity(opacity));
objects_to_draw.push_back(Magick::DrawableFillOpacity(opacity));
char buffer[2];
snprintf(buffer, sizeof(buffer), "%d", random() % 10);
objects_to_draw.push_back(Magick::DrawableText(x, initialheight - i * heightstep, buffer));
opacity *= opacity_fade();
}
draw(objects_to_draw);
}
void MatrixImage::verticallines(double width, double scale, double startopacity) {
int xstep = scale * 12;
for (int x = 0; x < width; x += xstep) {
verticalline(x, scale, startopacity);
std::cout << x << std::endl;
}
}
struct option longoptions[] = {
{ "foreground", required_argument, NULL, 'f' },
{ "background", required_argument, NULL, 'b' },
{ "opacity", required_argument, NULL, 'o' },
{ "width", required_argument, NULL, 'w' },
{ "height", required_argument, NULL, 'h' },
{ "scale", required_argument, NULL, 's' },
{ NULL, 0, NULL, 0 }
};
int main(int argc, char *argv[]) {
Magick::InitializeMagick(*argv);
int width = 1920;
int height = 1080;
double opacityfade = 0.9;
std::string backgroundcolor("black");
std::string foregroundcolor("#66ffcc");
int c;
int longindex;
double scale = 1;
while (EOF != (c = getopt_long(argc, argv, "f:b:o:w:h:s:", longoptions, &longindex)))
switch (c) {
case 'o':
opacityfade = std::stod(optarg);
break;
case 'w':
width = std::stoi(optarg);
break;
case 'h':
height = std::stoi(optarg);
break;
case 's':
scale = std::stod(optarg);
break;
case 'f':
foregroundcolor = std::string(optarg);
break;
case 'b':
backgroundcolor = std::string(optarg);
break;
}
if (optind >= argc) {
std::cerr << "no filename" << std::endl;
return EXIT_FAILURE;
}
std::string filename(argv[optind]);
Magick::Geometry geometry(width, height);
Magick::ColorRGB background(backgroundcolor);
Magick::ColorRGB schriftfarbe(foregroundcolor);
MatrixImage image(geometry, background, schriftfarbe);
image.opacity_fade(opacityfade);
image.verticallines(image.size().width(), 0.5 * scale, 0.25);
image.verticallines(image.size().width(), 0.7 * scale, 0.5);
image.verticallines(image.size().width(), 1 * scale, 1);
image.write(filename);
}
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