增加SetViewport

SpineViewer/Extensions/SFMLExtension.cs

@@ -8,6 +8,39 @@ namespace SpineViewer.Extensions
 {
     public static class SFMLExtension
     {
+        /// <summary>
+        /// 获取适合指定画布参数下能够覆盖包围盒的画布视区包围盒
+        /// </summary>
+        public static RectangleF GetCanvasBounds(this RectangleF bounds, Size resolution) => GetCanvasBounds(bounds, resolution, new(0), new(0));
+
+        /// <summary>
+        /// 获取适合指定画布参数下能够覆盖包围盒的画布视区包围盒
+        /// </summary>
+        public static RectangleF GetCanvasBounds(this RectangleF bounds, Size resolution, Padding margin) => GetCanvasBounds(bounds, resolution, margin, new(0));
+
+        /// <summary>
+        /// 获取适合指定画布参数下能够覆盖包围盒的画布视区包围盒
+        /// </summary>
+        public static RectangleF GetCanvasBounds(this RectangleF bounds, Size resolution, Padding margin, Padding padding)
+        {
+            float sizeW = bounds.Width;
+            float sizeH = bounds.Height;
+            float innerW = resolution.Width - padding.Horizontal;
+            float innerH = resolution.Height - padding.Vertical;
+            float scale = Math.Max(Math.Abs(sizeW / innerW), Math.Abs(sizeH / innerH)); // 取两方向上较大的缩放比, 以此让画布可以覆盖内容
+            float scaleW = scale * Math.Sign(sizeW);
+            float scaleH = scale * Math.Sign(sizeH);
+
+            innerW *= scaleW;
+            innerH *= scaleH;
+
+            var x = bounds.X - (innerW - sizeW) / 2 - (margin.Left + padding.Left) * scaleW;
+            var y = bounds.Y - (innerH - sizeH) / 2 - (margin.Top + padding.Top) * scaleH;
+            var w = (resolution.Width + margin.Horizontal) * scaleW;
+            var h = (resolution.Height + margin.Vertical) * scaleH;
+            return new(x, y, w, h);
+        }
+
         /// <summary>
         /// 获取 Winforms Bitmap 对象, 需要使用 Dispose 释放对象
         /// </summary>
@@ -29,26 +62,33 @@ namespace SpineViewer.Extensions
         }
 
         /// <summary>
-        /// 获取适合指定画布参数下能够覆盖包围盒的视区包围盒
+        /// 获取视图的包围盒
         /// </summary>
-        public static RectangleF GetResolutionBounds(this RectangleF bounds, Size resolution, Padding margin, Padding padding)
+        public static RectangleF GetBounds(this SFML.Graphics.View view)
+            => new(view.Center.X - view.Size.X / 2, view.Center.Y - view.Size.Y / 2, view.Size.X, view.Size.Y);
+
+        /// <summary>
+        /// 按画布设置视区, 边缘和填充区域将不会出现内容
+        /// </summary>
+        public static void SetViewport(this SFML.Graphics.View view, Size resolution, Padding margin, Padding padding)
         {
-            float sizeW = bounds.Width;
+            var innerW = resolution.Width - padding.Horizontal;
-            float sizeH = bounds.Height;
+            var innerH = resolution.Height - padding.Vertical;
-            float innerW = resolution.Width - padding.Horizontal;
-            float innerH = resolution.Height - padding.Vertical;
-            float scale = Math.Max(Math.Abs(sizeW / innerW), Math.Abs(sizeH / innerH)); // 取两方向上较大的缩放比, 以此让画布可以覆盖内容
-            float scaleW = scale * Math.Sign(sizeW);
-            float scaleH = scale * Math.Sign(sizeH);
 
-            innerW *= scaleW;
+            float width = resolution.Width + margin.Horizontal;
-            innerH *= scaleH;
+            float height = resolution.Height + margin.Vertical;
 
-            var x = bounds.X - (innerW - sizeW) / 2 - (margin.Left + padding.Left) * scaleW;
+            view.Viewport = new(
-            var y = bounds.Y - (innerH - sizeH) / 2 - (margin.Top + padding.Top) * scaleH;
+                (margin.Left + padding.Left) / width,
-            var w = (resolution.Width + margin.Horizontal) * scaleW;
+                (margin.Top + padding.Top) / height,
-            var h = (resolution.Height + margin.Vertical) * scaleH;
+                innerW / width,
-            return new(x, y, w, h);
+                innerH / height
+            );
+
+            var bounds = view.GetBounds().GetCanvasBounds(new(innerW, innerH));
+
+            view.Center = new(bounds.X + bounds.Width / 2, bounds.Y + bounds.Height / 2);
+            view.Size = new(bounds.Width, bounds.Height);
         }
     }
 }