Switch shader texture usage from sampler2D to texture2D plus sampler (fixes #1)

src/gui_node.rs

@@ -60,6 +60,7 @@ impl GuiNode {
 		let bind_group = Pipeline::build_bind_group(device, &pipeline.bind_group_layout, vec![
 			Pipeline::build_binding_resource(&binding_staging_buffer),
 			wgpu::BindingResource::TextureView(&texture.texture_view),
+			wgpu::BindingResource::Sampler(&texture.sampler),
 		]);
 		
 		vec![

src/main.rs

@@ -20,6 +20,10 @@ use winit::event_loop::EventLoop;
 use winit::window::WindowBuilder;
 
 fn main() {
+	// Display graphics API errors (requires Vulkan SDK is installed)
+	#[cfg(feature = "debug")]
+	env_logger::init();
+
 	// Handles all window events, user input, and redraws
 	let event_loop = EventLoop::new();
 

src/pipeline.rs

@@ -20,6 +20,7 @@ impl Pipeline {
 				component_type: wgpu::TextureComponentType::Float,
 				multisampled: false,
 			},
+			wgpu::BindingType::Sampler { comparison: false },
 		]);
 		
 		// Combine all bind group layouts