80 lines
2.4 KiB
C#
80 lines
2.4 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using Cairo;
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namespace Gdk
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{
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public class Context
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{
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private Context () {}
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// Note: we don't need or want a .dll.config since we p/invoke
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// the proper lib based on the os check below
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// win32 only imports
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[DllImport("libgdk-win32-2.0-0.dll")]
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internal static extern IntPtr gdk_win32_hdc_get(IntPtr drawable, IntPtr gc, int usage);
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[DllImport("libgdk-win32-2.0-0.dll")]
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internal static extern void gdk_win32_hdc_release(IntPtr drawable,IntPtr gc,int usage);
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// x11 only imports
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[DllImport("libgdk-x11-2.0.so.0")]
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internal static extern IntPtr gdk_x11_drawable_get_xdisplay (IntPtr handle);
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[DllImport("libgdk-x11-2.0.so.0")]
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internal static extern IntPtr gdk_drawable_get_visual (IntPtr handle);
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[DllImport("libgdk-x11-2.0.so.0")]
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internal static extern IntPtr gdk_x11_visual_get_xvisual (IntPtr handle);
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[DllImport("libgdk-x11-2.0.so.0")]
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internal static extern IntPtr gdk_x11_drawable_get_xid (IntPtr handle);
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public static Cairo.Context CreateDrawable (Gdk.Drawable drawable)
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{
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return CreateDrawable (drawable, true);
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}
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public static Cairo.Context CreateDrawable (Gdk.Drawable drawable, bool double_buffered)
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{
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int x, y, w, h, d;
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Cairo.Surface surface;
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bool needs_xlate;
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((Gdk.Window)drawable).GetGeometry(out x, out y, out w, out h, out d);
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PlatformID os = Environment.OSVersion.Platform;
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needs_xlate = drawable is Gdk.Window && double_buffered;
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if (needs_xlate)
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((Gdk.Window)drawable).GetInternalPaintInfo (out drawable, out x, out y);
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if (os == PlatformID.Win32Windows || os == PlatformID.Win32NT ||
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os == PlatformID.Win32S || os == PlatformID.WinCE) {
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Gdk.GC gcc = new Gdk.GC (drawable);
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IntPtr windc = gdk_win32_hdc_get (drawable.Handle, gcc.Handle, 0);
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surface = new Win32Surface (windc);
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if (double_buffered)
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gdk_win32_hdc_release (drawable.Handle, gcc.Handle, 0);
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} else {
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IntPtr display = gdk_x11_drawable_get_xdisplay (drawable.Handle);
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IntPtr visual = gdk_drawable_get_visual (drawable.Handle);
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IntPtr xvisual = gdk_x11_visual_get_xvisual (visual);
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IntPtr xdrawable = gdk_x11_drawable_get_xid (drawable.Handle);
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surface = new XlibSurface (display, xdrawable, xvisual, w, h);
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}
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Cairo.Context ctx = new Cairo.Context (surface);
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if (needs_xlate)
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ctx.Translate (-(double) x, -(double) y);
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return ctx;
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}
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}
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}
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