Bitmap/Flood fill: Difference between revisions
→{{header|PureBasic}}
Thundergnat (talk | contribs) (Rename Perl 6 -> Raku, alphabetize, minor clean-up) |
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Line 1,937:
call fill (125, 125, '000000001111111100000000'b );
</lang>
=={{header|Processing}}==
<lang java>import java.awt.Point;
import java.util.Queue;
import java.util.LinkedList;
PImage img;
int tolerance;
color fill_color;
boolean allowed;
void setup() {
size(600, 400);
img = loadImage("image.png");
fill_color = color(250, 0, 0);
fill(0, 0, 100);
tolerance = 15;
image(img, 0, 0, width, height);
textSize(18);
text("Tolerance = "+tolerance+" (Use mouse wheel to change)", 100, height-30);
text("Right click to reset", 100, height-10);
}
void draw() {
if (allowed) {
image(img, 0, 0, width, height);
text("Tolerance = "+tolerance+" (Use mouse wheel to change)", 100, height-30);
text("Right click to reset", 100, height-10);
allowed = false;
}
}
void mousePressed() {
img.loadPixels(); // A continious bitmap array with no reference to width
flood(mouseX, mouseY);
img.updatePixels();
allowed = true;
if(mouseButton == RIGHT) img = loadImage("image.png");
}
void mouseWheel(MouseEvent event) {
float e = event.getCount();
tolerance += 2*e;
if(tolerance > 256) tolerance = 256;
if (tolerance < 0) tolerance = 0;
allowed = true;
}
void flood(int x, int y) {
color target_color = img.pixels[pixel_position(mouseX, mouseY)];
boolean[][]p_control = new boolean[img.height][img.width];
Queue<Point> queue = new LinkedList<Point>();
queue.add(new Point(x, y));
while (!queue.isEmpty()) {
Point p = queue.remove();
if (check(p_control, p.x, p.y, target_color)) {
queue.add(new Point(p.x, p.y-1));
queue.add(new Point(p.x, p.y+1));
queue.add(new Point(p.x-1, p.y));
queue.add(new Point(p.x+1, p.y));
}
}
}
int pixel_position(int x, int y) { // Returns position of clicked coordinates width / height of the image
return x + (y * img.width);
}
boolean check(boolean[][]p_control, int x, int y, color target_color) {
if (x < 0 || y < 0 || y >= img.height || x >= img.width || p_control[y][x]) return false;
int pp = img.pixels[pixel_position(x, y)];
boolean test_tolerance = (abs(green(target_color)-green(pp)) < tolerance
&& abs( red(target_color)- red(pp)) < tolerance
&& abs( blue(target_color)- blue(pp)) < tolerance);
if (!test_tolerance) return false;
img.pixels[pixel_position(x, y)] = fill_color;
p_control[y][x] = true;
return true;
}</lang>
=={{header|PureBasic}}==
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