Disable sample rate shading

src/main.rs

@@ -13,7 +13,7 @@ use std::{
 const DYNAMIC_STATE: bool = true;
 const MSAA_ENABLE: bool = false;
 const MSAA_SAMPLES: u32 = 4;
-const SAMPLE_RATE_SHADING: f32 = 1.0;
+const SAMPLE_RATE_SHADING: Option<f32> = None; //1.0;
 
 const MSAA_SAMPLES_ACTUAL: u32 = if MSAA_ENABLE { MSAA_SAMPLES } else { 1 };
 
@@ -390,16 +390,16 @@ impl App {
                     },
                 ],
                 enabled_features: DeviceFeatures {
-                    mesh_shader: true,
-                    task_shader: true,
-                    sample_rate_shading: true,
+                    mesh_shader: false,
+                    task_shader: false,
+                    sample_rate_shading: SAMPLE_RATE_SHADING.is_some(),
                     //shader_float16: true,
                     shader_int16: true,
                     shader_int8: true,
                     storage_buffer8_bit_access: true,
                     storage_buffer16_bit_access: true,
                     geometry_shader: true,
-                    primitive_fragment_shading_rate: true,
+                    primitive_fragment_shading_rate: SAMPLE_RATE_SHADING.is_some(),
                     maintenance4: true,
                     dynamic_rendering: DYNAMIC_STATE,
                     ..DeviceFeatures::empty()
@@ -1410,7 +1410,7 @@ fn pipeline_recompile(
                 }),
                 multisample_state: Some(MultisampleState {
                     rasterization_samples: subpass.num_samples().unwrap(),
-                    sample_shading: Some(SAMPLE_RATE_SHADING),
+                    sample_shading: SAMPLE_RATE_SHADING,
                     ..Default::default()
                 }),
                 color_blend_state: Some(ColorBlendState::with_attachment_states(