Set scissoring properly in text::Pipeline

wgpu/src/backend.rs

@@ -291,7 +291,8 @@ impl Backend {
             }
 
             if !layer.text.is_empty() {
-                self.text_pipeline.render(text_layer, &mut render_pass);
+                self.text_pipeline
+                    .render(text_layer, bounds, &mut render_pass);
 
                 text_layer += 1;
             }

wgpu/src/text.rs

@@ -187,10 +187,18 @@ impl Pipeline {
     pub fn render<'a>(
         &'a self,
         layer: usize,
+        bounds: Rectangle<u32>,
         render_pass: &mut wgpu::RenderPass<'a>,
     ) {
         let renderer = &self.renderers[layer];
 
+        render_pass.set_scissor_rect(
+            bounds.x,
+            bounds.y,
+            bounds.width,
+            bounds.height,
+        );
+
         renderer
             .render(&self.atlas, render_pass)
             .expect("Render text");