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![Andrés G. Aragoneses](/assets/img/avatar_default.png)
Apply same finalizer leak fix to the rest of IDisposable-ownership cairo classes as the one recently committed for Cairo.Context[1]. [1] https://github.com/mono/gtk-sharp/commit/41eeecbf9a6d8
141 lines
3.4 KiB
C#
141 lines
3.4 KiB
C#
//
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// Mono.Cairo.ScaledFont.cs
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//
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// (c) 2008 Jordi Mas i Hernandez (jordimash@gmail.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Runtime.InteropServices;
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namespace Cairo {
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public class ScaledFont : IDisposable
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{
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protected IntPtr handle = IntPtr.Zero;
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internal ScaledFont (IntPtr handle, bool owner)
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{
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if (handle == IntPtr.Zero)
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throw new ArgumentException ("handle should not be NULL", "handle");
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this.handle = handle;
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if (!owner)
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NativeMethods.cairo_scaled_font_reference (handle);
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if (CairoDebug.Enabled)
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CairoDebug.OnAllocated (handle);
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}
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public ScaledFont (FontFace fontFace, Matrix matrix, Matrix ctm, FontOptions options)
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: this (NativeMethods.cairo_scaled_font_create (fontFace.Handle, matrix, ctm, options.Handle), true)
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{
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}
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~ScaledFont ()
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{
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Dispose (false);
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}
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public IntPtr Handle {
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get {
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return handle;
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}
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}
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public FontExtents FontExtents {
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get {
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CheckDisposed ();
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FontExtents extents;
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NativeMethods.cairo_scaled_font_extents (handle, out extents);
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return extents;
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}
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}
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public Matrix FontMatrix {
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get {
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CheckDisposed ();
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Matrix m;
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NativeMethods.cairo_scaled_font_get_font_matrix (handle, out m);
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return m;
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}
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}
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public FontType FontType {
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get {
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CheckDisposed ();
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return NativeMethods.cairo_scaled_font_get_type (handle);
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}
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}
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public TextExtents GlyphExtents (Glyph[] glyphs)
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{
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CheckDisposed ();
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IntPtr ptr = Context.FromGlyphToUnManagedMemory (glyphs);
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TextExtents extents;
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NativeMethods.cairo_scaled_font_glyph_extents (handle, ptr, glyphs.Length, out extents);
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Marshal.FreeHGlobal (ptr);
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return extents;
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}
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public Status Status
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{
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get {
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CheckDisposed ();
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return NativeMethods.cairo_scaled_font_status (handle);
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}
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}
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public void Dispose ()
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{
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Dispose (true);
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GC.SuppressFinalize (this);
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}
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protected virtual void Dispose (bool disposing)
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{
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if (!disposing || CairoDebug.Enabled)
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CairoDebug.OnDisposed<ScaledFont> (handle, disposing);
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if (handle == IntPtr.Zero)
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return;
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NativeMethods.cairo_scaled_font_destroy (handle);
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handle = IntPtr.Zero;
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}
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void CheckDisposed ()
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{
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if (handle == IntPtr.Zero)
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throw new ObjectDisposedException ("Object has already been disposed");
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}
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[Obsolete]
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protected void Reference ()
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{
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CheckDisposed ();
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NativeMethods.cairo_scaled_font_reference (handle);
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}
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}
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}
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