1+ // ***************************************************************************
2+ // This is free and unencumbered software released into the public domain.
3+ //
4+ // Anyone is free to copy, modify, publish, use, compile, sell, or
5+ // distribute this software, either in source code form or as a compiled
6+ // binary, for any purpose, commercial or non-commercial, and by any
7+ // means.
8+ //
9+ // In jurisdictions that recognize copyright laws, the author or authors
10+ // of this software dedicate any and all copyright interest in the
11+ // software to the public domain. We make this dedication for the benefit
12+ // of the public at large and to the detriment of our heirs and
13+ // successors. We intend this dedication to be an overt act of
14+ // relinquishment in perpetuity of all present and future rights to this
15+ // software under copyright law.
16+ //
17+ // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18+ // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19+ // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20+ // IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
21+ // OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
22+ // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
23+ // OTHER DEALINGS IN THE SOFTWARE.
24+ //
25+ // For more information, please refer to <http://unlicense.org>
26+ // ***************************************************************************
27+
28+ using System ;
29+ using System . Diagnostics ;
30+ using System . IO ;
31+ using System . Reflection ;
32+ using Microsoft . Xna . Framework ;
33+ using Microsoft . Xna . Framework . Graphics ;
34+
35+ namespace BloomEffectRenderer . Effects
36+ {
37+ /// <summary>
38+ /// Reperesents the bytecode of an <see cref="Effect" /> that is encapsulated inside a compiled assembly.
39+ /// </summary>
40+ /// <remarks>
41+ /// <para>
42+ /// Files that are encapsulated inside a compiled assembly are commonly known as Manifiest or embedded resources.
43+ /// Since embedded resources are added to the assembly at compiled time, they can not be accidentally deleted or
44+ /// misplaced. However, if the file needs to be changed, the assembly will need to be re-compiled with the changed
45+ /// file.
46+ /// </para>
47+ /// <para>
48+ /// To add an embedded resource file to an assembly, first add it to the project and then change the Build Action
49+ /// in the Properties of the file to <code>Embedded Resource</code>. The next time the project is compiled, the
50+ /// compiler will add the file to the assembly as an embedded resource. The compiler adds namespace(s) to the
51+ /// embedded resource so it matches with the path of where the file was added to the project.
52+ /// </para>
53+ /// </remarks>
54+ public class EffectResource
55+ {
56+ private static EffectResource extractEffect ;
57+ private static EffectResource blurEffect ;
58+ private static EffectResource combineEffect ;
59+ private static string shaderExtension ;
60+
61+ public static EffectResource ExtractEffect
62+ =>
63+ extractEffect ??
64+ ( extractEffect =
65+ new EffectResource ( $ "BloomEffectRenderer.Effects.Resources.BloomExtract.{ shaderExtension } .mgfxo") ) ;
66+ public static EffectResource BlurEffect
67+ =>
68+ blurEffect ??
69+ ( blurEffect =
70+ new EffectResource ( $ "BloomEffectRenderer.Effects.Resources.GaussianBlur.{ shaderExtension } .mgfxo") ) ;
71+ public static EffectResource CombineEffect
72+ =>
73+ combineEffect ??
74+ ( combineEffect =
75+ new EffectResource ( $ "BloomEffectRenderer.Effects.Resources.BloomCombine.{ shaderExtension } .mgfxo") ) ;
76+
77+ static EffectResource ( )
78+ {
79+ DetermineShaderExtension ( ) ;
80+ }
81+
82+ private static void DetermineShaderExtension ( )
83+ {
84+ // Use reflection to figure out if Shader.Profile is OpenGL (0) or DirectX (1).
85+ // May need to be changed / fixed for future shader profiles.
86+
87+ var assembly = typeof ( Game ) . GetTypeInfo ( ) . Assembly ;
88+ Debug . Assert ( assembly != null ) ;
89+
90+ var shaderType = assembly . GetType ( "Microsoft.Xna.Framework.Graphics.Shader" ) ;
91+ Debug . Assert ( shaderType != null ) ;
92+ var shaderTypeInfo = shaderType . GetTypeInfo ( ) ;
93+ Debug . Assert ( shaderTypeInfo != null ) ;
94+
95+ // https://github.com/MonoGame/MonoGame/blob/develop/MonoGame.Framework/Graphics/Shader/Shader.cs#L47
96+ var profileProperty = shaderTypeInfo . GetDeclaredProperty ( "Profile" ) ;
97+ var value = ( int ) profileProperty . GetValue ( null ) ;
98+
99+ switch ( value )
100+ {
101+ case 0 :
102+ // OpenGL
103+ shaderExtension = "ogl" ;
104+ break ;
105+ case 1 :
106+ // DirectX
107+ shaderExtension = "dx11" ;
108+ break ;
109+ default :
110+ throw new InvalidOperationException ( "Unknown shader profile." ) ;
111+ }
112+ }
113+
114+ public readonly string ResourceName ;
115+ private volatile byte [ ] bytecode ;
116+ private readonly Assembly assembly ;
117+
118+ public byte [ ] Bytecode
119+ {
120+ get
121+ {
122+ if ( bytecode != null )
123+ return bytecode ;
124+
125+ lock ( this )
126+ {
127+ if ( bytecode != null )
128+ return bytecode ;
129+
130+ var stream = assembly . GetManifestResourceStream ( ResourceName ) ;
131+ using ( var memoryStream = new MemoryStream ( ) )
132+ {
133+ stream . CopyTo ( memoryStream ) ;
134+ bytecode = memoryStream . ToArray ( ) ;
135+ }
136+ }
137+
138+ return bytecode ;
139+ }
140+ }
141+
142+ /// <summary>
143+ /// Initializes a new instance of the <see cref="EffectResource" /> class.
144+ /// </summary>
145+ /// <param name="resourceName">The name of the embedded resource. This must include the namespace(s).</param>
146+ /// <param name="assembly">The assembly which the embedded resource is apart of.</param>
147+ public EffectResource ( string resourceName , Assembly assembly = null )
148+ {
149+ ResourceName = resourceName ;
150+ this . assembly = assembly ?? typeof ( EffectResource ) . GetTypeInfo ( ) . Assembly ;
151+ }
152+ }
153+ }
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