render_with_clicks.go

package main

/*
#cgo LDFLAGS: -L/usr/x11/lib -lX11
#cgo CFLAGS: -w

#include <X11/Xlib.h>
#include <unistd.h>
#include <stdio.h>

Window GetRoot(Display *d) {
        return DefaultScreen(d);
}

void coords (Display *display, int *x, int *y)
{
  XEvent event;
  XQueryPointer (display, DefaultRootWindow (display),
                 &event.xbutton.root, &event.xbutton.window,
                 &event.xbutton.x_root, &event.xbutton.y_root,
                 &event.xbutton.x, &event.xbutton.y,
                 &event.xbutton.state);
  *x = event.xbutton.x;
  *y = event.xbutton.y;
}

void MoveTo(Display *display, int x, int y) {
        int cur_x, cur_y;
        coords(display, &cur_x, &cur_y);
        XWarpPointer(display, None, None, 0, 0, 0, 0, -cur_x, -cur_y);
        XWarpPointer(display, None, None, 0, 0, 0, 0, x, y);
        usleep(1);
}

void ClickOn(Display *display) {
        XEvent event;
  memset (&event, 0, sizeof (event));
  event.xbutton.button = Button1;
  event.xbutton.same_screen = True;
  event.xbutton.subwindow = DefaultRootWindow (display);
  while (event.xbutton.subwindow)
    {
      event.xbutton.window = event.xbutton.subwindow;
      XQueryPointer (display, event.xbutton.window,
                     &event.xbutton.root, &event.xbutton.subwindow,
                     &event.xbutton.x_root, &event.xbutton.y_root,
                     &event.xbutton.x, &event.xbutton.y,
                     &event.xbutton.state);
    }
  // Press
  event.type = ButtonPress;
  if (XSendEvent (display, PointerWindow, True, ButtonPressMask, &event) == 0)
    fprintf (stderr, "Error to send the event!\n");
  XFlush (display);
  usleep (1);
  // Release
  event.type = ButtonRelease;
  if (XSendEvent (display, PointerWindow, True, ButtonReleaseMask, &event) == 0)
    fprintf (stderr, "Error to send the event!\n");
  XFlush (display);
  usleep (1);
}
*/
import "C"

import (
        "fmt"
        "image"
        "os"
        "strconv"

        cv "gocv.io/x/gocv"
)

func main() {
        Display := C.XOpenDisplay(nil)

        fmt.Println("starting")

        x, _ := strconv.Atoi(os.Args[1])
        y, _ := strconv.Atoi(os.Args[2])
        w, _ := strconv.Atoi(os.Args[3])
        h, _ := strconv.Atoi(os.Args[4])

        image_file := os.Args[5]

        img := cv.NewMat()

        img = cv.IMRead(image_file, 0)

        cv.Resize(img, &img, image.Point{w, h}, 1, 1, 2)
        fmt.Println("resize done")

        imgPtr := img.DataPtrUint8()

        C.MoveTo(Display, C.int(x), C.int(y))
        C.ClickOn(Display)

        C.MoveTo(Display, C.int(x+w), C.int(y))
        C.ClickOn(Display)

        C.MoveTo(Display, C.int(x), C.int(y+h))
        C.ClickOn(Display)

        C.MoveTo(Display, C.int(x+w), C.int(y+h))
        C.ClickOn(Display)

        fmt.Println(w, y, w, h)
        fmt.Println(img.Rows(), img.Cols())

        for i := 0; i < img.Rows(); i += 3 {
                for j := 0; j < img.Cols(); j += 3 {
                        if imgPtr[i*img.Cols()+j] < 10 {
                                C.MoveTo(Display, C.int(x+j), C.int(y+i))
                                C.ClickOn(Display)
                        }
                }
        }
}