rt(mtl): draw final pass to output targets

librashader-runtime-mtl/src/draw_quad.rs

@@ -58,22 +58,6 @@ pub struct DrawQuad {
 impl DrawQuad {
     pub fn new(device: &ProtocolObject<dyn MTLDevice>) -> Result<DrawQuad> {
         let vbo_data: &'static [u8] = bytemuck::cast_slice(&VBO_DATA);
-        // let buffer = unsafe {
-        //     device
-        //         .newBufferWithBytes_length_options(
-        //             // SAFETY: this pointer is const.
-        //             // https://developer.apple.com/documentation/metal/mtldevice/1433429-newbufferwithbytes
-        //             NonNull::new_unchecked(vbo_data.as_ptr() as *mut c_void),
-        //             vbo_data.len(),
-        //             if cfg!(target_os = "ios") {
-        //                 MTLResourceStorageModeShared
-        //             } else {
-        //                 MTLResourceStorageModeManaged
-        //             },
-        //         )
-        //         .ok_or(FilterChainError::BufferError)?
-        // };
-
         let buffer = unsafe {
             device
                 .newBufferWithBytes_length_options(

librashader-runtime-mtl/src/filter_chain.rs

@@ -27,7 +27,7 @@ use librashader_runtime::quad::QuadType;
 use librashader_runtime::render_target::RenderTarget;
 use librashader_runtime::scaling::ScaleFramebuffer;
 use librashader_runtime::uniforms::UniformStorage;
-use objc2::rc::{Id, Retained};
+use objc2::rc::Id;
 use objc2::runtime::ProtocolObject;
 use objc2_foundation::NSString;
 use objc2_metal::{
@@ -206,7 +206,6 @@ impl FilterChainMetal {
         cmd: &ProtocolObject<dyn MTLCommandBuffer>,
         input: &ProtocolObject<dyn MTLTexture>,
     ) -> error::Result<()> {
-
         if let Some(mut back) = self.history_framebuffers.pop_back() {
             let mipmapper = cmd
                 .blitCommandEncoder()
@@ -436,6 +435,8 @@ impl FilterChainMetal {
                 target.generate_mipmaps(&cmd)?;
             }
 
+            self.common.output_textures[index] =
+                Some(target.as_input(pass.config.filter, pass.config.wrap_mode)?);
             source = self.common.output_textures[index]
                 .as_ref()
                 .map(InputTexture::try_clone)
@@ -446,7 +447,10 @@ impl FilterChainMetal {
         assert_eq!(last.len(), 1);
 
         if let Some(pass) = last.iter_mut().next() {
-            if pass.graphics_pipeline.render_pass_format != viewport.output.pixelFormat() {
+            if !pass
+                .graphics_pipeline
+                .has_format(viewport.output.pixelFormat())
+            {
                 // need to recompile
                 pass.graphics_pipeline
                     .recompile(&self.common.device, viewport.output.pixelFormat())?;
@@ -455,6 +459,24 @@ impl FilterChainMetal {
             source.filter_mode = pass.config.filter;
             source.wrap_mode = pass.config.wrap_mode;
             source.mip_filter = pass.config.filter;
+            let index = passes_len - 1;
+
+            let output_image = &self.output_framebuffers[index].texture;
+
+            let out = RenderTarget::viewport_with_output(output_image.as_ref(), viewport);
+            pass.draw(
+                &cmd,
+                passes_len - 1,
+                &self.common,
+                pass.config.get_frame_count(frame_count),
+                options,
+                viewport,
+                &original,
+                &source,
+                &out,
+                QuadType::Final,
+            )?;
+
             let output_image = viewport.output;
             let out = RenderTarget::viewport_with_output(output_image, viewport);
             pass.draw(

librashader-runtime-mtl/src/graphics_pipeline.rs

@@ -15,6 +15,7 @@ use objc2_metal::{
     MTLVertexFormat, MTLVertexStepFunction, MTLViewport,
 };
 
+use librashader_common::map::FastHashMap;
 use objc2::rc::Retained;
 use objc2::runtime::ProtocolObject;
 
@@ -23,8 +24,8 @@ pub const VERTEX_BUFFER_INDEX: usize = 4;
 
 pub struct MetalGraphicsPipeline {
     pub layout: PipelineLayoutObjects,
-    render_pipeline: Retained<ProtocolObject<dyn MTLRenderPipelineState>>,
+    render_pipelines:
-    pub render_pass_format: MTLPixelFormat,
+        FastHashMap<MTLPixelFormat, Retained<ProtocolObject<dyn MTLRenderPipelineState>>>,
 }
 
 pub struct PipelineLayoutObjects {
@@ -154,20 +155,25 @@ impl MetalGraphicsPipeline {
     ) -> Result<Self> {
         let layout = PipelineLayoutObjects::new(shader_assembly, device)?;
         let pipeline = layout.create_pipeline(device, render_pass_format)?;
+        let mut pipelines = FastHashMap::default();
+        pipelines.insert(render_pass_format, pipeline);
         Ok(Self {
             layout,
-            render_pipeline: pipeline,
+            render_pipelines: pipelines,
-            render_pass_format,
         })
     }
 
+    pub fn has_format(&self, format: MTLPixelFormat) -> bool {
+        self.render_pipelines.contains_key(&format)
+    }
+
     pub fn recompile(
         &mut self,
         device: &ProtocolObject<dyn MTLDevice>,
         format: MTLPixelFormat,
     ) -> Result<()> {
         let render_pipeline = self.layout.create_pipeline(device, format)?;
-        self.render_pipeline = render_pipeline;
+        self.render_pipelines.insert(format, render_pipeline);
         Ok(())
     }
 
@@ -177,6 +183,14 @@ impl MetalGraphicsPipeline {
         buffer: &ProtocolObject<dyn MTLCommandBuffer>,
     ) -> Result<Retained<ProtocolObject<dyn MTLRenderCommandEncoder>>> {
         unsafe {
+            let Some(pipeline) = self
+                .render_pipelines
+                .get(&output.output.pixelFormat())
+                .or_else(|| self.render_pipelines.values().next())
+            else {
+                panic!("No render available pipeline found");
+            };
+
             let descriptor = MTLRenderPassDescriptor::new();
             let ca = descriptor.colorAttachments().objectAtIndexedSubscript(0);
             ca.setLoadAction(MTLLoadAction::DontCare);
@@ -188,7 +202,7 @@ impl MetalGraphicsPipeline {
                 .ok_or(FilterChainError::FailedToCreateRenderPass)?;
 
             rpass.setLabel(Some(&*NSString::from_str("librashader rpass")));
-            rpass.setRenderPipelineState(&self.render_pipeline);
+            rpass.setRenderPipelineState(pipeline);
 
             rpass.setScissorRect(MTLScissorRect {
                 x: output.x as usize,

librashader-runtime-mtl/tests/hello_triangle/main.rs

@@ -220,7 +220,7 @@ declare_class!(
                 .expect("Failed to create a pipeline state.");
 
            let preset =
-            ShaderPreset::try_parse("../test/shaders_slang/crt/crt-royale.slangp").unwrap();
+            ShaderPreset::try_parse("../test/shaders_slang/test/feedback.slangp").unwrap();
 
         let filter_chain = FilterChainMetal::load_from_preset(
             preset,