Allow iced_wgpu to render to any TextureView

wgpu/src/viewport.rs

@@ -0,0 +1,32 @@
+use crate::Transformation;
+
+#[derive(Debug)]
+pub struct Viewport {
+    width: u32,
+    height: u32,
+    scale_factor: f32,
+    transformation: Transformation,
+}
+
+impl Viewport {
+    pub fn new(width: u32, height: u32, scale_factor: f64) -> Viewport {
+        Viewport {
+            width,
+            height,
+            scale_factor: scale_factor as f32,
+            transformation: Transformation::orthographic(width, height),
+        }
+    }
+
+    pub fn dimensions(&self) -> (u32, u32) {
+        (self.width, self.height)
+    }
+
+    pub fn scale_factor(&self) -> f32 {
+        self.scale_factor
+    }
+
+    pub(crate) fn transformation(&self) -> Transformation {
+        self.transformation
+    }
+}