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Use different implementations for accessing GDI+ internals on .Net and Mono.

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This commit is contained in:
the_fiddler 2008-11-03 23:34:54 +00:00
parent f4700cb676
commit f218071fa7
4 changed files with 108 additions and 21 deletions
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34
Source/OpenTK/GdiPlus.cs
View file

@ -18,6 +18,8 @@ namespace OpenTK.Platform
{
internal static class GdiPlus
{
static IGdiPlusInternals internals;
const string gdi_plus_library = "gdiplus.dll";
static readonly PropertyInfo native_graphics_property, native_font_property;
static readonly FieldInfo native_string_format_field;
@ -26,33 +28,29 @@ namespace OpenTK.Platform
static GdiPlus()
{
native_graphics_property =
typeof(System.Drawing.Graphics).GetProperty("NativeGraphics", BindingFlags.Instance | BindingFlags.NonPublic);
native_font_property =
typeof(System.Drawing.Font).GetProperty("NativeFont", BindingFlags.Instance | BindingFlags.NonPublic);
native_string_format_field =
typeof(System.Drawing.StringFormat).GetField("nativeFormat", BindingFlags.Instance | BindingFlags.NonPublic);
if (Configuration.RunningOnWindows)
internals = new Windows.WinGdiPlusInternals();
else
internals = new X11.X11GdiPlusInternals();
}
#endregion
#region --- Reflection ---
#region --- Public Methods ---
public static IntPtr GetNativeGraphics(System.Drawing.Graphics graphics)
{
return (IntPtr)native_graphics_property.GetValue(graphics, null);
return internals.GetNativeGraphics(graphics);
}
public static IntPtr GetNativeFont(Font font)
{
return (IntPtr)native_font_property.GetValue(font, null);
return internals.GetNativeFont(font);
}
public static IntPtr GetNativeStringFormat(StringFormat format)
{
return (IntPtr)native_string_format_field.GetValue(format);
return internals.GetNativeStringFormat(format);
}
public static int MaxMeasurableCharacterRanges
@ -63,11 +61,7 @@ namespace OpenTK.Platform
}
}
#endregion
#region --- Methods ---
[DllImport(gdi_plus_library, CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true, EntryPoint="GdipSetStringFormatMeasurableCharacterRanges")]
[DllImport(gdi_plus_library, CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true, EntryPoint = "GdipSetStringFormatMeasurableCharacterRanges")]
public static extern int SetStringFormatMeasurableCharacterRanges(HandleRef format, int rangeCount, [In, Out] CharacterRange[] range);
[DllImport(gdi_plus_library, CharSet = CharSet.Unicode, SetLastError = true, ExactSpelling = true, EntryPoint = "GdipGetStringFormatMeasurableCharacterRangeCount")]
@ -87,6 +81,7 @@ namespace OpenTK.Platform
#endregion
#if false
[StructLayout(LayoutKind.Sequential)]
internal struct GPRECTF
{
@ -122,9 +117,6 @@ namespace OpenTK.Platform
return new RectangleF(this.X, this.Y, this.Width, this.Height);
}
}
#endif
}
}

21
Source/OpenTK/Platform/IGdiPlusInternals.cs Normal file
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@ -0,0 +1,21 @@
using System;
using System.Collections.Generic;
using System.Text;
namespace OpenTK.Platform
{
// Provides methods to access internal GdiPlus fields. This is necessary for
// managed <-> native GdiPlus interoperability.
// Note that the fields are named differently between .Net and Mono.
// GdiPlus is considered deprecated by Microsoft - it is highly unlikely that
// future framework upgrades will break this code, but it is something to
// keep in mind.
interface IGdiPlusInternals
{
IntPtr GetNativeGraphics(System.Drawing.Graphics graphics);
IntPtr GetNativeFont(System.Drawing.Font font);
IntPtr GetNativeStringFormat(System.Drawing.StringFormat format);
}
}

46
Source/OpenTK/Platform/Windows/WinGdiPlusInternals.cs Normal file
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@ -0,0 +1,46 @@
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Reflection;
namespace OpenTK.Platform.Windows
{
class WinGdiPlusInternals : IGdiPlusInternals
{
const string gdi_plus_library = "gdiplus.dll";
static readonly PropertyInfo native_graphics_property, native_font_property;
static readonly FieldInfo native_string_format_field;
static WinGdiPlusInternals()
{
native_graphics_property =
typeof(System.Drawing.Graphics).GetProperty("NativeGraphics", BindingFlags.Instance | BindingFlags.NonPublic);
native_font_property =
typeof(System.Drawing.Font).GetProperty("NativeFont", BindingFlags.Instance | BindingFlags.NonPublic);
native_string_format_field =
typeof(System.Drawing.StringFormat).GetField("nativeFormat", BindingFlags.Instance | BindingFlags.NonPublic);
}
#region --- IGdiPlusInternals Members ---
public IntPtr GetNativeGraphics(System.Drawing.Graphics graphics)
{
return (IntPtr)native_graphics_property.GetValue(graphics, null);
}
public IntPtr GetNativeFont(Font font)
{
return (IntPtr)native_font_property.GetValue(font, null);
}
public IntPtr GetNativeStringFormat(StringFormat format)
{
return (IntPtr)native_string_format_field.GetValue(format);
}
#endregion
}
}

28
Source/OpenTK/Platform/X11/X11GdiPlusInternals.cs Normal file
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@ -0,0 +1,28 @@
using System;
using System.Collections.Generic;
using System.Text;
namespace OpenTK.Platform.X11
{
class X11GdiPlusInternals : IGdiPlusInternals
{
#region IGdiPlusInternals Members
public IntPtr GetNativeGraphics(System.Drawing.Graphics graphics)
{
throw new NotImplementedException();
}
public IntPtr GetNativeFont(System.Drawing.Font font)
{
throw new NotImplementedException();
}
public IntPtr GetNativeStringFormat(System.Drawing.StringFormat format)
{
throw new NotImplementedException();
}
#endregion
}
}