18.09.2020

+ Textures
~ Changed 2D coordnate system to lower right as XY+

SMCode/SM.Base/Textures/Texture.cs

@@ -0,0 +1,51 @@
+using System.Drawing;
+using System.Drawing.Imaging;
+using OpenTK.Graphics.OpenGL4;
+using SM.OGL.Texture;
+using PixelFormat = System.Drawing.Imaging.PixelFormat;
+
+namespace SM.Base.Textures
+{
+    public class Texture : TextureBase
+    {
+        public Bitmap Map;
+
+        public Texture(Bitmap map) : this(map, TextureMinFilter.Linear, TextureWrapMode.Repeat) {}
+
+        public Texture(Bitmap map, TextureMinFilter filter, TextureWrapMode wrapMode)
+        {
+            Map = map;
+            Filter = filter;
+            WrapMode = wrapMode;
+        }
+
+        protected override void Compile()
+        {
+            base.Compile();
+
+            _id = GL.GenTexture();
+            GL.BindTexture(TextureTarget.Texture2D, _id);
+
+            BitmapData data = Map.LockBits(new Rectangle(0, 0, Map.Width, Map.Height), ImageLockMode.ReadOnly,
+                Map.PixelFormat);
+
+            bool transparenz = Map.PixelFormat == PixelFormat.Format32bppArgb;
+
+            GL.TexImage2D(TextureTarget.Texture2D, 0, 
+                transparenz ? PixelInternalFormat.Rgba : PixelInternalFormat.Rgb,
+                data.Width, data.Height, 0,
+                transparenz ? OpenTK.Graphics.OpenGL4.PixelFormat.Bgra : OpenTK.Graphics.OpenGL4.PixelFormat.Bgr,
+                PixelType.UnsignedByte, data.Scan0);
+
+            GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)Filter);
+            GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)Filter);
+            GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int) WrapMode);
+            GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int) WrapMode);
+
+            GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
+
+            GL.BindTexture(TextureTarget.Texture2D, 0);
+            Map.UnlockBits(data);
+        }
+    }
+}