make new opengl source generator

2026-08-26 18:12:08 +08:00
parent 65041ff8bc
commit 75bf7fc139
126 changed files with 8934 additions and 26139 deletions
@@ -0,0 +1,149 @@
+// -----------------------------------------------------------------------------
+// file="AutoTexture"
+// Project: StgSharp
+// Copyright (c) Nitload.
+// SPDX-License-Identifier: MIT
+// -----------------------------------------------------------------------------
+
+using StgSharp.Collections;
+using StgSharp.Graphics;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Text;
+
+using System.Threading.Tasks;
+
+namespace StgSharp.Graphics.OpenGL
+{
+    /// <summary>
+    ///   A collection of a sets of OpenGL textures. The collection can automatically select one of
+    ///   the  texture with minimum costs to upgrade pixels to BufferHandle. Usually <see ///  
+    ///   cref="AutoTextureGL" /> is used for <see cref="IImageProvider" /> loading, but not for
+    ///   target of  <see cref="OpenGLFunction.FrameBufferTexture2d(FrameBufferTarget, uint, ///  
+    ///   Texture2DTarget, GlHandle, int)" />.
+    /// </summary>
+    public sealed class AutoTextureGL
+    {
+
+        private TextureProperty[] propertyCache;
+        private BidirectionalDictionary<Image, int> imageIndexMap = new BidirectionalDictionary<Image, int>(
+            );
+        private Dictionary<Image, int> imageUpdateIndex = new Dictionary<Image, int>();
+
+        private int _size, _currentIndex;
+        private LinkedList<int> usedTextureIndex;
+        private Queue<int> unusedTextureUnitIndex;
+        private TextureGL texturePackage;
+
+        private TextureProperty _textureProperty;
+
+        private AutoTextureGL(
+                TextureGL texture
+        )
+        {
+            texturePackage = texture;
+            _size = texture.Count;
+            imageIndexMap = new BidirectionalDictionary<Image, int>();
+            unusedTextureUnitIndex = new Queue<int>(Enumerable.Range(0, _size));
+            usedTextureIndex = new LinkedList<int>();
+            propertyCache = new TextureProperty[_size];
+        }
+
+        public AutoTextureGL(
+               int textureObjectSize,
+               [NotNull]glRender binding
+        )
+        {
+            this._size = textureObjectSize;
+            imageIndexMap = new BidirectionalDictionary<Image, int>();
+            texturePackage = new TextureGL(textureObjectSize, binding);
+            unusedTextureUnitIndex = new Queue<int>(Enumerable.Range(0, _size));
+            usedTextureIndex = new LinkedList<int>();
+            propertyCache = new TextureProperty[_size];
+        }
+
+        public TextureProperty DefaultTextureProperty
+        {
+            get => _textureProperty;
+            set => _textureProperty = value;
+        }
+
+        private OpenGLFunction GL => texturePackage.GL;
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void SelectTextureAndBind(
+                    Image i
+        )
+        {
+            TextureProperty property = _textureProperty;
+
+            SelectTextureAndBind(i, property);
+        }
+
+        public void SelectTextureAndBind(
+                    [NotNull]Image i,
+                    TextureProperty property
+        )
+        {
+            // usable texture with image match
+            if (imageIndexMap.TryGetValue(i, out int index))
+            {
+                // prop setting match
+                if (propertyCache[index] == property)
+                {
+                    _currentIndex = index;                          //GL.Assert(true);
+                    texturePackage.Bind2D(index);                   //GL.Assert(true);
+                    if (i.PixelUpdateCount != imageUpdateIndex[i])
+                    {
+                        texturePackage.LoadTexture(index, i);       //GL.Assert(true);
+                    }
+                } else
+                {
+                    _currentIndex = index;                          //GL.Assert(true);
+                    texturePackage.Bind2D(index);                   //GL.Assert(true);
+                    texturePackage.Set2dProperty(index, property);  //GL.Assert(true);
+                    if (i.PixelUpdateCount != imageUpdateIndex[i])
+                    {
+                        texturePackage.LoadTexture(index, i);       //GL.Assert(true);
+                    }
+                }
+            } else
+            {
+                if (unusedTextureUnitIndex.TryDequeue(out int newIndex))
+                {
+                    // has extra unused texture object
+                    imageIndexMap.Add(i, index);
+                    texturePackage.Bind2D(index);
+                    texturePackage.Set2dProperty(index, property);
+                    texturePackage.LoadTexture(index, i);
+                    usedTextureIndex.AddLast(newIndex);
+                    propertyCache[newIndex] = property;
+                    imageUpdateIndex[i] = i.PixelUpdateCount;
+                } else
+                {
+                    // recycle from current
+                    int reusedIndex = usedTextureIndex.First!.Value;
+                    usedTextureIndex.RemoveFirst();
+                    usedTextureIndex.AddLast(reusedIndex);
+                    imageIndexMap[i] = reusedIndex;
+                    propertyCache[newIndex] = property;
+                    imageUpdateIndex[i] = i.PixelUpdateCount;
+                }
+            }
+        }
+
+        public static AutoTextureGL ToAuto(
+                                    [NotNull]TextureGL texture
+        )
+        {
+            if (texture.IndexOfCurrentTexture != -1) {
+                throw new InvalidOperationException("Texture to be converted has been editted.");
+            }
+            return new AutoTextureGL(texture);
+        }
+
+    }
+}