78 lines
2.1 KiB
C#
78 lines
2.1 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2019 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System;
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using System.Drawing;
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using System.IO;
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using System.Runtime.InteropServices;
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using SDL2;
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namespace OpenRA.Platforms.Default
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{
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class Sdl2HardwareCursorException : Exception
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{
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public Sdl2HardwareCursorException(string message) : base(message) { }
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public Sdl2HardwareCursorException(string message, Exception innerException) : base(message, innerException) { }
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}
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sealed class Sdl2HardwareCursor : IHardwareCursor
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{
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public IntPtr Cursor { get; private set; }
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IntPtr surface;
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public Sdl2HardwareCursor(Size size, byte[] data, int2 hotspot)
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{
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try
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{
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surface = SDL.SDL_CreateRGBSurface(0, size.Width, size.Height, 32, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000);
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if (surface == IntPtr.Zero)
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throw new InvalidDataException("Failed to create surface: {0}".F(SDL.SDL_GetError()));
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var sur = (SDL.SDL_Surface)Marshal.PtrToStructure(surface, typeof(SDL.SDL_Surface));
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Marshal.Copy(data, 0, sur.pixels, data.Length);
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// This call very occasionally fails on Windows, but often works when retried.
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for (var retries = 0; retries < 3 && Cursor == IntPtr.Zero; retries++)
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Cursor = SDL.SDL_CreateColorCursor(surface, hotspot.X, hotspot.Y);
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if (Cursor == IntPtr.Zero)
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throw new Sdl2HardwareCursorException("Failed to create cursor: {0}".F(SDL.SDL_GetError()));
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}
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catch
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{
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Dispose();
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throw;
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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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void Dispose(bool disposing)
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{
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if (Cursor != IntPtr.Zero)
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{
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SDL.SDL_FreeCursor(Cursor);
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Cursor = IntPtr.Zero;
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}
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if (surface != IntPtr.Zero)
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{
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SDL.SDL_FreeSurface(surface);
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surface = IntPtr.Zero;
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}
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}
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}
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}
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