public RCode ThreadCleanUp()
{
Marshal.FreeHGlobal(ev);
Xlib.XDestroyWindow(display, mainWindow);
Xlib.XCloseDisplay(display);
return(RCode.OK);
}
public void Dispose()
{
if (_handle != IntPtr.Zero && _handle != _defaultDisp)
{
Xlib.XCloseDisplay(_handle);
}
}
/// <summary>
/// <para>Close the X display connection if it is currently active.</para>
/// </summary>
public void Close()
{
lock (this)
{
if (dpy != IntPtr.Zero)
{
lock (typeof(Display))
{
// Disassociate window handles from all windows.
for (int scr = 0; scr < screens.Length; ++scr)
{
screens[scr].RootWindow.Disassociate();
}
// Disassociate the fonts from this display.
IDictionaryEnumerator e = fonts.GetEnumerator();
while (e.MoveNext())
{
((Font)(e.Value)).Disassociate(this);
}
fonts.Clear();
// Close the connection to the X server.
Xlib.XCloseDisplay(dpy);
dpy = IntPtr.Zero;
}
}
}
}
// Probe an X display to see if it is usable.
private static bool ProbeDisplay(String displayName, bool reportErrors)
{
if (!displayProbed)
{
// Probe the new display to see if it can be used.
displayProbed = true;
IntPtr probe = Xlib.XOpenDisplay(displayName);
if (probe == IntPtr.Zero)
{
if (reportErrors && !errorReported)
{
Console.Error.WriteLine
("The X server at `{0}' is not " +
"accessible. You may need",
displayName);
Console.Error.WriteLine
("to use `xhost +' to permit access.");
errorReported = true;
}
displayExists = false;
return(false);
}
Xlib.XCloseDisplay(probe);
displayExists = true;
}
return(displayExists);
}
static void Main(string[] args)
{
var display = Xlib.XOpenDisplay(null);
var root = Xlib.XDefaultRootWindow(display);
Xlib.XGetWindowAttributes(display, root, out var attr);
Console.WriteLine($"Display geometry: {attr.width} x {attr.height}");
var Image = Xlib.XGetImage(display, root, 0, 0, attr.width, attr.height, Xlib.AllPlanes, Pixmap.ZPixmap);
Console.WriteLine($"Got an image {Image.width} x {Image.height}, depth {Image.depth}");
var mat = OpenCV.CV.cvCreateMat(Image.height, Image.width, OpenCV.CV.CV_8UC4);
OpenCV.CV.cvInitMatHeader(mat, Image.height, Image.width, OpenCV.CV.CV_8UC4, Image.data);
OpenCV.CV.cvShowImage("test", mat);
OpenCV.CV.cvWaitKey();
Xutil.XDestroyImage(ref Image);
Xlib.XCloseDisplay(display);
}
public void Dispose()
{
Listener.Abort();
Xlib.XCloseDisplay(Display);
}
public Program(SimpleLogger.LogLevel level)
{
Log = new SimpleLogger(level);
Log.Info("Started class");
/* areas to update */
IntPtr updates, current_update;
/* our virtual framebuffer image we draw into */
IntPtr buffer;
/* a font */
IntPtr font;
/* our color range */
IntPtr range;
/* our mouse x, y coordinates */
int mouse_x = 0, mouse_y = 0;
/* connect to X */
disp = Xlib.XOpenDisplay(null);
/* get default visual , colormap etc. you could ask imlib2 for what it */
/* thinks is the best, but this example is intended to be simple */
vis = Xlib.XDefaultVisual(disp, Xlib.XDefaultScreen(disp));
depth = Xlib.XDefaultDepth(disp, Xlib.XDefaultScreen(disp));
cm = Xlib.XDefaultColormap(disp, Xlib.XDefaultScreen(disp));
/* create a window 640x480 */
win = Xlib.XCreateSimpleWindow(disp, Xlib.XDefaultRootWindow(disp),
0, 0, 640, 480, 0, 0, 0);
OnError = ErrorHandler;
Xlib.XSetErrorHandler(OnError);
/* tell X what events we are interested in */
Xlib.XSelectInput(disp, win,
EventMask.ButtonPressMask | EventMask.ButtonReleaseMask |
EventMask.KeyPressMask |
EventMask.PointerMotionMask | EventMask.ExposureMask);
/* show the window */
Xlib.XMapWindow(disp, win);
/* set our cache to 2 Mb so it doesn't have to go hit the disk as long as */
/* the images we use use less than 2Mb of RAM (that is uncompressed) */
Imlib.imlib_set_cache_size(2048 * 1024);
/* set the font cache to 512Kb - again to avoid re-loading */
Imlib.imlib_set_font_cache_size(512 * 1024);
/* add the ./ttfonts dir to our font path - you'll want a notepad.ttf */
/* in that dir for the text to display */
Imlib.imlib_add_path_to_font_path("/usr/share/fonts/truetype/ubuntuz");
/* set the maximum number of colors to allocate for 8bpp and less to 128 */
Imlib.imlib_set_color_usage(128);
/* dither for depths < 24bpp */
Imlib.imlib_context_set_dither(1);
/* set the display , visual, colormap and drawable we are using */
Imlib.imlib_context_set_display(disp);
Imlib.imlib_context_set_visual(vis);
Imlib.imlib_context_set_colormap(cm);
Imlib.imlib_context_set_drawable(win);
/* infinite event loop */
Atom WM_DELETE_WINDOW = Xlib.XInternAtom(disp, "WM_DELETE_WINDOW", false);
XSetWMProtocols(disp, win, out WM_DELETE_WINDOW, 1);
IntPtr ev = Marshal.AllocHGlobal(24 * sizeof(long));
var home = Environment.GetEnvironmentVariable("HOME");
var done = false;
while (!done)
{
/* image variable */
IntPtr image;
/* width and height values */
int w, h, text_w, text_h;
/* init our updates to empty */
updates = Imlib.imlib_updates_init();
/* while there are events form X - handle them */
do
{
Xlib.XNextEvent(disp, ev);
var xevent = Marshal.PtrToStructure <X11.XAnyEvent>(ev);
switch (xevent.type)
{
case (int)Event.ClientMessage:
// TODO Should check here for other client message types -
// however as the only protocol registered above is WM_DELETE_WINDOW
// it is safe for this small example.
done = true;
Console.WriteLine("Client Message");
break;
case (int)Event.Expose:
/* window rectangle was exposed - add it to the list of */
/* rectangles we need to re-render */
var expose_event = Marshal.PtrToStructure <X11.XExposeEvent>(ev);
updates = Imlib.imlib_update_append_rect(updates,
expose_event.x, expose_event.y,
expose_event.width, expose_event.height);
break;
case (int)Event.KeyPress:
/* if we click anywhere in the window, exit */
var key_event = Marshal.PtrToStructure <X11.XKeyEvent>(ev);
X11.KeySym key = Xlib.XKeycodeToKeysym(disp, (KeyCode)key_event.keycode, 0);
if (key == KeySym.XK_Escape)
{
Console.WriteLine($"{key} / {KeySym.XK_Escape}");
done = true;
}
break;
case (int)Event.MotionNotify:
/* if the mouse moves - note it */
/* add a rectangle update for the new mouse position */
var motion_event = Marshal.PtrToStructure <X11.XMotionEvent>(ev);
image = Imlib.imlib_load_image($"{home}/.local/share/data/images/Arrow.png");
Imlib.imlib_context_set_image(image);
w = Imlib.imlib_image_get_width();
h = Imlib.imlib_image_get_height();
Imlib.imlib_context_set_image(image);
Imlib.imlib_free_image();
/* the old position - so we wipe over where it used to be */
updates = Imlib.imlib_update_append_rect(updates,
mouse_x - (w / 2), mouse_y - (h / 2),
w, h);
font = Imlib.imlib_load_font("Ubuntu-M/30");
if (font != IntPtr.Zero)
{
Imlib.imlib_context_set_font(font);
string text = String.Format($"Mouse is at {mouse_x}, {mouse_y}");
Imlib.imlib_get_text_size(text, out text_w, out text_h);
Imlib.imlib_free_font();
updates = Imlib.imlib_update_append_rect(updates,
320 - (text_w / 2), 240 - (text_h / 2),
text_w, text_h);
}
mouse_x = motion_event.x;
mouse_y = motion_event.y;
/* the new one */
updates = Imlib.imlib_update_append_rect(updates,
mouse_x - (w / 2), mouse_y - (h / 2),
w, h);
font = Imlib.imlib_load_font("Ubuntu-M/30");
if (font != IntPtr.Zero)
{
Imlib.imlib_context_set_font(font);
string text = String.Format($"Mouse is at {mouse_x}, {mouse_y}");
Imlib.imlib_get_text_size(text, out text_w, out text_h);
Imlib.imlib_free_font();
updates = Imlib.imlib_update_append_rect(updates,
320 - (text_w / 2), 240 - (text_h / 2),
text_w, text_h);
}
break;
default:
/* any other events - do nothing */
break;
}
}while (Xlib.XPending(disp) != 0);
/* no more events for now ? ok - idle time so lets draw stuff */
/* take all the little rectangles to redraw and merge them into */
/* something sane for rendering */
updates = Imlib.imlib_updates_merge_for_rendering(updates, 640, 480);
for (current_update = updates;
current_update != IntPtr.Zero;
current_update = Imlib.imlib_updates_get_next(current_update))
{
int up_x, up_y, up_w, up_h;
/* find out where the first update is */
Imlib.imlib_updates_get_coordinates(current_update,
out up_x, out up_y, out up_w, out up_h);
/* create our buffer image for rendering this update */
buffer = Imlib.imlib_create_image(up_w, up_h);
/* we can blend stuff now */
Imlib.imlib_context_set_blend(1);
/* fill the window background */
/* load the background image - you'll need to have some images */
/* in ./images lying around for this to actually work */
// image = Imlib.imlib_load_image("./data/images/bg.png");
image = Imlib.imlib_load_image($"{home}/.local/share/catlock/themes/badabing.locked.jpg");
/* we're working with this image now */
Imlib.imlib_context_set_image(image);
/* get its size */
w = Imlib.imlib_image_get_width();
h = Imlib.imlib_image_get_height();
/* now we want to work with the buffer */
Imlib.imlib_context_set_image(buffer);
/* if the iimage loaded */
if (image != IntPtr.Zero)
{
/* blend image onto the buffer and scale it to 640x480 */
Imlib.imlib_blend_image_onto_image(image, 0,
0, 0, w, h,
-up_x, -up_y, 640, 480);
/* working with the loaded image */
Imlib.imlib_context_set_image(image);
/* free it */
Imlib.imlib_free_image();
}
/* draw an icon centered around the mouse position */
image = Imlib.imlib_load_image($"{home}/.local/share/data/images/Arrow.png");
Imlib.imlib_context_set_image(image);
w = Imlib.imlib_image_get_width();
h = Imlib.imlib_image_get_height();
Imlib.imlib_context_set_image(buffer);
if (image != IntPtr.Zero)
{
Imlib.imlib_blend_image_onto_image(image, 0,
0, 0, w, h,
mouse_x - (w / 2) - up_x, mouse_y - (h / 2) - up_y, w, h);
Imlib.imlib_context_set_image(image);
Imlib.imlib_free_image();
}
/* draw a gradient on top of things at the top left of the window */
/* create a range */
range = Imlib.imlib_create_color_range();
Imlib.imlib_context_set_color_range(range);
/* add white opaque as the first color */
Imlib.imlib_context_set_color(255, 255, 255, 255);
Imlib.imlib_add_color_to_color_range(0);
/* add an orange color, semi-transparent 10 units from the first */
Imlib.imlib_context_set_color(255, 200, 10, 100);
Imlib.imlib_add_color_to_color_range(10);
/* add black, fully transparent at the end 20 units away */
Imlib.imlib_context_set_color(0, 0, 0, 0);
Imlib.imlib_add_color_to_color_range(20);
/* draw the range */
Imlib.imlib_context_set_image(buffer);
Imlib.imlib_image_fill_color_range_rectangle(-up_x, -up_y, 128, 128, -45.0);
/* free it */
Imlib.imlib_free_color_range();
/* draw text - centered with the current mouse x, y */
font = Imlib.imlib_load_font("Ubuntu-M/30");
if (font != IntPtr.Zero)
{
/* set the current font */
Imlib.imlib_context_set_font(font);
/* set the image */
Imlib.imlib_context_set_image(buffer);
/* set the color (black) */
Imlib.imlib_context_set_color(0, 0, 0, 255);
/* print text to display in the buffer */
string text = String.Format($"Mouse is at {mouse_x}, {mouse_y}");
/* query the size it will be */
Imlib.imlib_get_text_size(text, out text_w, out text_h);
/* draw it */
Imlib.imlib_text_draw(320 - (text_w / 2) - up_x, 240 - (text_h / 2) - up_y, text);
/* free the font */
Imlib.imlib_free_font();
}
/* don't blend the image onto the drawable - slower */
Imlib.imlib_context_set_blend(0);
/* set the buffer image as our current image */
Imlib.imlib_context_set_image(buffer);
/* render the image at 0, 0 */
Imlib.imlib_render_image_on_drawable(up_x, up_y);
/* don't need that temporary buffer image anymore */
Imlib.imlib_free_image();
}
/* if we had updates - free them */
if (updates != IntPtr.Zero)
{
Imlib.imlib_updates_free(updates);
}
/* loop again waiting for events */
}
Marshal.FreeHGlobal(ev);
// Xlib.XFreeGC(disp, gc);
Xlib.XDestroyWindow(disp, win);
Xlib.XCloseDisplay(disp);
}
