public static extern Picture XRenderCreatePicture(
DisplayPtr dpy,
Drawable drawable,
PictFormatPtr format,
XRenderPictureAttributeMask valuemask,
ref XRenderPictureAttributes attributes
);
public void DrawImage(INativeImage image, int x, int y)
{
x -= origin.X;
y -= origin.Y;
// todo: allow null?
X11Image x11Image = (X11Image)image;
XRenderPictureAttributes attr = new XRenderPictureAttributes();
var tempPictureId = LibXRender.XRenderCreatePicture(display, x11Image.PixmapId, pictFormatPtr, 0, ref attr);
try
{
LibXRender.XRenderComposite
(
display,
PictOp.PictOpOver,
tempPictureId,
0,
pictureId,
0, 0,
0, 0,
x, y,
(uint)x11Image.Width, (uint)x11Image.Height
);
}
finally
{
LibXRender.XRenderFreePicture(display, tempPictureId);
}
}
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);
}