Removed Subrepository

2022-09-04 13:23:45 +02:00
parent f4a01d6a69
commit 2cdae71f61
109 changed files with 12072 additions and 1 deletions
--- a/C#/OpenGLTutorial/Rendering/Display/Texture.cs
+++ b/C#/OpenGLTutorial/Rendering/Display/Texture.cs
@@ -0,0 +1,73 @@
+using System.IO;
+using StbiSharp;
+using static OpenGL.GL;
+
+namespace OpenGLTutorial.Rendering.Display {
+    public class Texture {
+
+        public static Texture Empty => new(null);
+
+        public int Width { get; private set; }
+        public int Height { get; private set; }
+        
+        private uint Address { get; set; }
+        private string Path { get; }
+        private bool _loaded = false;
+
+        public Texture(string path) {
+            Path = path;
+        }
+
+        public unsafe void Load() {
+            if (_loaded) return;
+            _loaded = true;
+            Address = glGenTexture();
+            glBindTexture(GL_TEXTURE_2D, Address);
+            
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+            glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+
+            if (string.IsNullOrEmpty(Path)) {
+                LoadEmpty();
+                return;
+            }
+
+            using var stream = File.OpenRead(Path);
+            using var memoryStream = new MemoryStream();
+            stream.CopyTo(memoryStream);
+            StbiImage image = Stbi.LoadFromMemory(memoryStream, 0);
+            int format = image.NumChannels == 3 ? GL_RGB : GL_RGBA;
+            fixed(byte* data = &image.Data[0])
+                glTexImage2D(GL_TEXTURE_2D, 0, format, image.Width, image.Height, 0, format, GL_UNSIGNED_BYTE, data);
+            Width = image.Width;
+            Height = image.Height;
+            
+            glBindTexture(GL_TEXTURE_2D, 0);
+        }
+
+        private unsafe void LoadEmpty() {
+            byte[] pixels = {255, 255, 255, 255};
+
+            fixed (byte* data = &pixels[0]) {
+                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+            }
+
+            Width = 1;
+            Height = 1;
+            
+            glBindTexture(GL_TEXTURE_2D, 0);
+        }
+
+        public void Use() {
+            glBindTexture(GL_TEXTURE_2D, Address);
+        }
+
+        public void Delete() {
+            glBindTexture(GL_TEXTURE_2D, 0);
+            glDeleteTexture(Address);
+        }
+        
+    }
+}