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Prevent leaking of hardware cursors.

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Added the lacking finialization machinery, ensured disposal under exceptional circumstances and also ensure the game calls dispose on old cursors before creating new ones.
This commit is contained in:
RoosterDragon
2015-04-21 20:24:26 +01:00
parent b4fa704fbd
commit c963806dae
2 changed files with 53 additions and 14 deletions
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64
OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs
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@@ -106,11 +106,14 @@ namespace OpenRA.Renderer.Sdl2
public IHardwareCursor CreateHardwareCursor(string name, Size size, byte[] data, int2 hotspot)
{
var c = new SDL2HardwareCursor(size, data, hotspot);
if (c.Cursor == IntPtr.Zero)
throw new InvalidDataException("Failed to create hardware cursor `{0}`: {1}".F(name, SDL.SDL_GetError()));
return c;
try
{
return new SDL2HardwareCursor(size, data, hotspot);
}
catch (Exception ex)
{
throw new InvalidDataException("Failed to create hardware cursor `{0}`".F(name), ex);
}
}
public void SetHardwareCursor(IHardwareCursor cursor)
@@ -125,24 +128,57 @@ namespace OpenRA.Renderer.Sdl2
}
}
class SDL2HardwareCursor : IHardwareCursor
sealed class SDL2HardwareCursor : IHardwareCursor
{
public readonly IntPtr Cursor;
readonly IntPtr surface;
public IntPtr Cursor { get; private set; }
IntPtr surface;
public SDL2HardwareCursor(Size size, byte[] data, int2 hotspot)
{
surface = SDL.SDL_CreateRGBSurface(0, size.Width, size.Height, 32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000);
try
{
surface = SDL.SDL_CreateRGBSurface(0, size.Width, size.Height, 32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000);
if (surface == IntPtr.Zero)
throw new InvalidDataException("Failed to create surface: {0}".F(SDL.SDL_GetError()));
var sur = (SDL2.SDL.SDL_Surface)Marshal.PtrToStructure(surface, typeof(SDL2.SDL.SDL_Surface));
Marshal.Copy(data, 0, sur.pixels, data.Length);
Cursor = SDL.SDL_CreateColorCursor(surface, hotspot.X, hotspot.Y);
var sur = (SDL2.SDL.SDL_Surface)Marshal.PtrToStructure(surface, typeof(SDL2.SDL.SDL_Surface));
Marshal.Copy(data, 0, sur.pixels, data.Length);
Cursor = SDL.SDL_CreateColorCursor(surface, hotspot.X, hotspot.Y);
if (Cursor == IntPtr.Zero)
throw new InvalidDataException("Failed to create cursor: {0}".F(SDL.SDL_GetError()));
}
catch
{
Dispose();
throw;
}
}
~SDL2HardwareCursor()
{
Game.RunAfterTick(() => Dispose(false));
}
public void Dispose()
{
SDL.SDL_FreeCursor(Cursor);
SDL.SDL_FreeSurface(surface);
Game.RunAfterTick(() => Dispose(true));
GC.SuppressFinalize(this);
}
void Dispose(bool disposing)
{
if (Cursor != IntPtr.Zero)
{
SDL.SDL_FreeCursor(Cursor);
Cursor = IntPtr.Zero;
}
if (surface != IntPtr.Zero)
{
SDL.SDL_FreeSurface(surface);
surface = IntPtr.Zero;
}
}
}