Implement DrawTexture functionality (#2747)

* Implement DrawTexture functionality

* Non-NVIDIA support

* Disable some features that should not affect draw texture (slow path)

* Remove space from shader source

* Match 2D engine names

* Fix resolution scale and add missing XML docs

* Disable transform feedback for draw texture fallback

Ryujinx.Graphics.GAL/Extents2DF.cs

@@ -0,0 +1,18 @@
+namespace Ryujinx.Graphics.GAL
+{
+    public struct Extents2DF
+    {
+        public float X1 { get; }
+        public float Y1 { get; }
+        public float X2 { get; }
+        public float Y2 { get; }
+
+        public Extents2DF(float x1, float y1, float x2, float y2)
+        {
+            X1 = x1;
+            Y1 = y1;
+            X2 = x2;
+            Y2 = y2;
+        }
+    }
+}