private void WithExtraCanvas(Rectangle rect, Action <X11Canvas> action)
{
using (X11Image tempImage = X11Image.Create(display, visual, drawableId, rect.Width, rect.Height))
{
var gcValues = new XGCValues();
gcValues.foreground = ToPArgb(Color.Transparent);
var gcValueMask = XGCValueMask.GCForeground;
var gc = LibX11.XCreateGC(display, drawableId, gcValueMask, ref gcValues);
try
{
// todo: check int -> uint conversion
LibX11.XFillRectangle(display, tempImage.PixmapId, gc, 0, 0, (uint)rect.Width, (uint)rect.Height);
}
finally
{
LibX11.XFreeGC(display, gc);
}
using (var innerCanvas = X11Canvas.CreateForDrawable(display, screenNum, objectCache, visual, colormap, pictFormatPtr, tempImage.PixmapId))
{
action(innerCanvas);
DrawImage(tempImage, rect.X + origin.X, rect.Y + origin.Y);
}
}
}
public static X11Canvas CreateForDrawable(
IntPtr display,
int screenNum,
X11ObjectCache objectCache,
IntPtr visual,
ulong colormap,
IntPtr pictFormatPtr,
ulong drawableId
)
{
const XRenderPictureAttributeMask attrMask =
XRenderPictureAttributeMask.CPPolyEdge |
XRenderPictureAttributeMask.CPPolyMode;
XRenderPictureAttributes attr = new XRenderPictureAttributes
{
poly_edge = XRenderPolyEdge.Smooth,
poly_mode = XRenderPolyMode.Imprecise
};
ulong pictureId = LibXRender.XRenderCreatePicture
(
display,
drawableId,
pictFormatPtr,
attrMask,
ref attr
);
IntPtr xftDraw = IntPtr.Zero;
X11Canvas canvas = null;
try
{
xftDraw = LibXft.XftDrawCreate(display, drawableId, visual, colormap);
canvas = new X11Canvas(display, screenNum, objectCache, visual, colormap, pictFormatPtr, drawableId, pictureId, xftDraw);
xftDraw = IntPtr.Zero;
}
finally
{
if (canvas == null)
{
if (xftDraw != IntPtr.Zero)
{
LibXft.XftDrawDestroy(xftDraw);
}
LibXRender.XRenderFreePicture(display, pictureId);
}
}
return(canvas);
}
public void Run(INativeWindowStartupInfo window)
{
XSetWindowAttributes attr = new XSetWindowAttributes();
attr.border_pixel = 0;
attr.bit_gravity = 1 /*NorthWestGravity */;
attr.event_mask = XEventMask.ExposureMask |
XEventMask.ButtonPressMask |
XEventMask.ButtonReleaseMask |
XEventMask.FocusChangeMask |
XEventMask.KeyPressMask |
XEventMask.KeyReleaseMask |
XEventMask.PointerMotionMask |
XEventMask.StructureNotifyMask;
attr.colormap = graphics.ColorMap;
ulong windowId = LibX11.XCreateWindow
(
display,
graphics.RootWindow,
0, 0,
(uint)window.Width, (uint)window.Height,
1,
graphics.PictFormat.depth,
WindowClass.InputOutput,
graphics.Visual,
XSetWindowAttributeMask.CWBorderPixel |
XSetWindowAttributeMask.CWBitGravity |
XSetWindowAttributeMask.CWEventMask |
XSetWindowAttributeMask.CWColormap,
ref attr
);
X11Window nativeWindow = new X11Window(display, windowId, Invalidate);
window.OnCreate(nativeWindow);
nativeWindow.SetTitle(window.Title);
var protocols = new[] { WM_DELETE_WINDOW };
LibX11.XSetWMProtocols(display, windowId, protocols, protocols.Length);
LibX11.XMapWindow(display, windowId);
LibX11.XFlush(display);
byte[] textBuffer = new byte[32];
bool autoRepeat = false;
bool windowClosed = false;
while (!windowClosed)
{
LibX11.XNextEvent(display, out XEvent evt);
if (evt.type == XEventType.Expose)
{
var rect = new Rectangle(evt.ExposeEvent.x, evt.ExposeEvent.y, evt.ExposeEvent.width, evt.ExposeEvent.height);
Invalidate(rect);
}
else if (evt.type == XEventType.MotionNotify)
{
window.OnMouseMove(new Point(evt.MotionEvent.x, evt.MotionEvent.y));
}
else if (evt.type == XEventType.ConfigureNotify)
{
Size clientArea = new Size(evt.ConfigureEvent.width, evt.ConfigureEvent.height);
window.OnResize(clientArea);
}
else if (evt.type == XEventType.ButtonPress)
{
window.OnMouseButtonDown(
GetMouseButton(evt.ButtonEvent.button),
new Point(evt.ButtonEvent.x, evt.ButtonEvent.y),
GetModifierKey(evt.ButtonEvent.state)
);
}
else if (evt.type == XEventType.ButtonRelease)
{
window.OnMouseButtonUp(
GetMouseButton(evt.ButtonEvent.button),
new Point(evt.ButtonEvent.x, evt.ButtonEvent.y)
);
}
else if (evt.type == XEventType.KeyPress)
{
// XLookupString returns no more than the requested number of characters, but it also writes a zero-byte after them
int charCount = LibX11.XLookupString(ref evt.KeyEvent, textBuffer, textBuffer.Length - 1, out var keySym, IntPtr.Zero);
var keyCode = X11KeyMap.GetKeyCode(keySym);
if (keyCode == NKeyCode.Unknown)
{
keySym = LibX11.XLookupKeysym(ref evt.KeyEvent, 0);
keyCode = X11KeyMap.GetKeyCode(keySym);
}
window.OnKeyDown(keyCode, GetModifierKey(evt.KeyEvent.state), autoRepeat);
autoRepeat = false;
if (charCount > 0)
{
string text = Encoding.UTF8.GetString(textBuffer, 0, charCount);
StringBuilder sb = new StringBuilder(text.Length);
foreach (char c in text)
{
if (!char.IsControl(c))
{
sb.Append(c);
}
}
if (sb.Length > 0)
{
window.OnTextInput(sb.ToString());
}
}
}
else if (evt.type == XEventType.KeyRelease)
{
if (LibX11.XPending(display) > 0)
{
LibX11.XPeekEvent(display, out XEvent nextEvent);
autoRepeat =
nextEvent.type == XEventType.KeyPress &&
nextEvent.KeyEvent.time == evt.KeyEvent.time &&
nextEvent.KeyEvent.keycode == evt.KeyEvent.keycode;
}
if (!autoRepeat)
{
// XLookupString returns no more than the requested number of characters, but it also writes a zero-byte after them
LibX11.XLookupString(ref evt.KeyEvent, textBuffer, textBuffer.Length - 1, out var keySym, IntPtr.Zero);
var keyCode = X11KeyMap.GetKeyCode(keySym);
if (keyCode == NKeyCode.Unknown)
{
keySym = LibX11.XLookupKeysym(ref evt.KeyEvent, 0);
keyCode = X11KeyMap.GetKeyCode(keySym);
}
window.OnKeyUp(keyCode);
}
}
else if (evt.type == XEventType.FocusIn)
{
if (IsWindowActivationEvent(evt.FocusChangeEvent.mode, evt.FocusChangeEvent.detail))
{
window.OnActivated();
}
}
else if (evt.type == XEventType.FocusOut)
{
if (IsWindowActivationEvent(evt.FocusChangeEvent.mode, evt.FocusChangeEvent.detail))
{
window.OnDeactivated();
}
}
else if (evt.type == XEventType.ClientMessage)
{
var cevt = evt.ClientMessageEvent;
if (cevt.message_type == WM_PROTOCOLS && cevt.data0 == WM_DELETE_WINDOW)
{
windowClosed = true;
}
else if (cevt.message_type == XA_NWINDOWS_PAINT_COMPLETE)
{
paintQueued = false;
}
}
if (invalidatedArea != null && !paintQueued)
{
Rectangle area = invalidatedArea.Value;
invalidatedArea = null;
using (X11Image image = graphics.CreateImage(area.Width, area.Height))
{
using (X11Canvas canvas = graphics.CreateCanvas(image.PixmapId))
{
canvas.SetOrigin(area.X, area.Y);
window.OnPaint(canvas, area);
}
using (X11Canvas canvas = graphics.CreateCanvas(windowId))
{
canvas.DrawImage(image, area.X, area.Y);
}
}
paintQueued = true;
var message = XEvent.CreateClientMessage(windowId, XA_NWINDOWS_PAINT_COMPLETE);
LibX11.XSendEvent(display, windowId, 0, XEventMask.NoEventMask, ref message);
}
}
}
internal X11Canvas CreateCanvas(ulong drawableId)
{
return(X11Canvas.CreateForDrawable(display, screen, objectCache, visual, colorMap, pictFormatPtr, drawableId));
}
