add from giga-device, new branch added

2025-08-21 16:51:25 +08:00
commit 43bbc06bbb
1296 changed files with 264186 additions and 0 deletions
@@ -0,0 +1,93 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="glFucntionSourceManager.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the ¡°Software¡±), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED ¡°AS IS¡±, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using StgSharp;
+
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+
+namespace StgSharp.Graphics.OpenGL
+{
+    public partial class OpenGLFunction
+    {
+
+        private Lazy<int> textureUnitCountGetter;
+        private Lazy<ConcurrentQueue<TextureUnit>> unusedTextureImageUintInitilizing;
+
+        public int TextureUnitCount
+        {
+            get => textureUnitCountGetter.Value;
+        }
+
+        private ConcurrentQueue<TextureUnit> UnusedTextureImageUint
+        {
+            get => unusedTextureImageUintInitilizing.Value;
+        }
+
+        internal void ReturnAvailableUnit( IEnumerable<TextureUnit> source )
+        {
+            int v = glConst.TEXTURE0 + TextureUnitCount;
+            foreach( TextureUnit unit in source )
+            {
+                if( ( int )unit > v ) {
+                    throw new InvalidOperationException(
+                        "Source contains texture unit beyond context support." );
+                }
+            }
+        }
+
+        internal int TryGetAvailableTextureUnit( int count, out IEnumerable<TextureUnit> result )
+        {
+            result = new Queue<TextureUnit>();
+            for( int i = 0; i < count; i++ )
+            {
+                if( UnusedTextureImageUint.TryDequeue( out TextureUnit unit ) )
+                {
+                    ( result as Queue<TextureUnit> )!.Enqueue( unit );
+                } else
+                {
+                    return i;
+                }
+            }
+            return count;
+        }
+
+        private ConcurrentQueue<TextureUnit> InitializeUnusedTextureImageUint()
+        {
+            ConcurrentQueue<TextureUnit> result = new ConcurrentQueue<TextureUnit>();
+            for( int index = 0; index < TextureUnitCount; index++ ) {
+                result.Enqueue( ( TextureUnit )( glConst.TEXTURE0 + index ) );
+            }
+            return result;
+        }
+
+    }
+}