rt(d3d12): clear rtv before rendering

Author: chyyran

librashader-runtime-d3d12/src/filter_pass.rs

@@ -202,6 +202,12 @@ impl FilterPass {
                 },
             }];
 
+            cmd.ClearRenderTargetView(
+                *output.output.descriptor.as_ref(),
+                &[0.0, 0.0, 0.0, 0.0],
+                None,
+            );
+
             cmd.BeginRenderPass(Some(&pass), None, D3D12_RENDER_PASS_FLAG_NONE)
         }
 

librashader-runtime-d3d12/src/framebuffer.rs

@@ -18,7 +18,7 @@ use std::mem::ManuallyDrop;
 use std::sync::Arc;
 use windows::core::Interface;
 use windows::Win32::Graphics::Direct3D12::{
-    ID3D12Device, ID3D12GraphicsCommandList, ID3D12Resource, D3D12_BOX,
+    ID3D12Device, ID3D12GraphicsCommandList, ID3D12Resource, D3D12_BOX, D3D12_CLEAR_VALUE,
     D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING, D3D12_FEATURE_DATA_FORMAT_SUPPORT,
     D3D12_FORMAT_SUPPORT1_MIP, D3D12_FORMAT_SUPPORT1_RENDER_TARGET,
     D3D12_FORMAT_SUPPORT1_SHADER_SAMPLE, D3D12_FORMAT_SUPPORT1_TEXTURE2D,
@@ -121,7 +121,11 @@ impl OwnedImage {
             resource_category: ResourceCategory::RtvDsvTexture,
             resource_desc: &desc,
             castable_formats: &[],
-            clear_value: None,
+            clear_value: Some(&D3D12_CLEAR_VALUE {
+                Format: desc.Format,
+                // Default is fine since its just zeroes.
+                Anonymous: Default::default(),
+            }),
             initial_state_or_layout: ResourceStateOrBarrierLayout::ResourceState(
                 D3D12_RESOURCE_STATE_PIXEL_SHADER_RESOURCE,
             ),

librashader-runtime-d3d12/tests/triangle.rs

@@ -5,8 +5,8 @@ use crate::hello_triangle::{DXSample, SampleCommandLine};
 #[test]
 fn triangle_d3d12() {
     let sample = hello_triangle::d3d12_hello_triangle::Sample::new(
-        "../test/shaders_slang/sonkun/slot-mask/flat-screen/1080p/test.slangp",
-        // "../test/shaders_slang/crt/crt-royale.slangp",
+        // "../test/shaders_slang/sonkun/slot-mask/flat-screen/1080p/test.slangp",
+        "../test/shaders_slang/crt/crt-royale.slangp",
         // "../test/basic.slangp",
         // "../test/shaders_slang/handheld/console-border/gbc-lcd-grid-v2.slangp",
         // "../test/Mega_Bezel_Packs/Duimon-Mega-Bezel/Presets/Advanced/Nintendo_GBA_SP/GBA_SP-[ADV]-[LCD-GRID]-[Night].slangp",