From c7de871865235953ae38fcc253ffbf297774a083 Mon Sep 17 00:00:00 2001
From: samstalhandske <samstalhandske@hotmail.com>
Date: Fri, 14 Nov 2025 14:40:05 +0100
Subject: [PATCH] Started on the render-pipeline/pass architecture.

---
 pass.odin                            |  9 ++++++
 pipeline.odin                        | 47 ++++++++++++++++++++++++++++
 renderer.odin                        | 22 ++++++++++---
 renderer_backend_opengl_windows.odin |  2 +-
 4 files changed, 75 insertions(+), 5 deletions(-)
 create mode 100644 pass.odin
 create mode 100644 pipeline.odin

diff --git a/pass.odin b/pass.odin
new file mode 100644
index 0000000..caa6dfe
--- /dev/null
+++ b/pass.odin
@@ -0,0 +1,9 @@
+package renderer
+
+RGB_Color  :: [3]u8
+RGBA_Color :: [4]u8
+
+Pass :: struct {
+    name: string,
+    clear_color: RGB_Color,
+}
\ No newline at end of file
diff --git a/pipeline.odin b/pipeline.odin
new file mode 100644
index 0000000..8501d62
--- /dev/null
+++ b/pipeline.odin
@@ -0,0 +1,47 @@
+package renderer
+
+import "core:mem"
+import "core:log"
+
+MAX_PASSES_IN_PIPELINE :: 8
+
+Pipeline :: struct {
+    passes: [MAX_PASSES_IN_PIPELINE]^Pass,
+    amount_of_passes: u8,
+}
+
+clear_pipeline :: proc(renderer: ^Renderer) {
+    assert(renderer != nil)
+    pipeline := &renderer.pipeline
+    
+    pipeline.amount_of_passes = 0;
+    mem.set(&pipeline.passes[0], 0, MAX_PASSES_IN_PIPELINE * size_of(Pass))
+}
+
+set_pipeline :: proc(renderer: ^Renderer, passes: []^Pass) {
+    clear_pipeline(renderer)
+    for p in passes {
+        if !add_pass_to_pipeline(renderer, p) {
+            return
+        }
+    }
+}
+
+@(private="file") add_pass_to_pipeline :: proc(renderer: ^Renderer, pass: ^Pass) -> bool {
+    assert(renderer != nil)
+    assert(pass != nil)
+
+    pipeline := &renderer.pipeline
+    
+    if pipeline.amount_of_passes == MAX_PASSES_IN_PIPELINE {
+        log.warnf("Failed to add pass '%v' to renderer's pipeline; hit max capacity (%v).", pass.name, MAX_PASSES_IN_PIPELINE)
+        return false
+    }
+
+    pipeline.passes[pipeline.amount_of_passes] = pass
+    pipeline.amount_of_passes += 1
+
+    log.infof("Successfully added pass '%v' to pipeline.", pass.name)
+
+    return true
+}
\ No newline at end of file
diff --git a/renderer.odin b/renderer.odin
index 08a016f..0abb012 100644
--- a/renderer.odin
+++ b/renderer.odin
@@ -1,6 +1,7 @@
 package renderer
 
 import "core:fmt"
+import "core:log"
 
 RENDER_BACKEND_OPENGL       :: #config(RENDER_BACKEND_OPENGL,       false)
 RENDER_BACKEND_VULKAN       :: #config(RENDER_BACKEND_VULKAN,       false)
@@ -13,6 +14,8 @@ Renderer :: struct {
     viewport: Viewport,
     surface_ptr: rawptr,
     backend: rawptr,
+
+    pipeline: Pipeline,    
 }
 
 Viewport :: struct {
@@ -26,7 +29,6 @@ Renderer_API :: enum {
     Metal,
 }
 
-
 create :: proc(surface_ptr: rawptr) -> (^Renderer, bool) {
     renderer := new(Renderer)
     renderer.surface_ptr = surface_ptr
@@ -64,17 +66,29 @@ set_viewport :: proc(renderer: ^Renderer, x, y, width, height: u16) {
     }
 }
 
-set_clear_color :: proc(renderer: ^Renderer, color: [3]u8) {
+@(private="file") set_clear_color :: proc(renderer: ^Renderer, color: RGB_Color) {
     when RENDER_BACKEND_OPENGL {
         opengl_set_clear_color(renderer, color)
     }
 }
 
 render_frame :: proc(renderer: ^Renderer) {
-    
+    pipeline := &renderer.pipeline
+    for i in 0 ..< pipeline.amount_of_passes {
+        pass := pipeline.passes[i]
+
+        // TODO: SS - "Activate" the pass.
+        set_clear_color(renderer, pass.clear_color)
+        
+        // TODO: SS - Loop over the pass' render-commands.
+
+        // TODO: SS - "Deactivate" the pass.
+    }
+
+    swap_buffers(renderer)
 }
 
-swap_buffers :: proc(renderer: ^Renderer) {
+@(private="file") swap_buffers :: proc(renderer: ^Renderer) {
     when RENDER_BACKEND_OPENGL {
         opengl_swap_buffers(renderer)
     }
diff --git a/renderer_backend_opengl_windows.odin b/renderer_backend_opengl_windows.odin
index 3ec2e15..332c21c 100644
--- a/renderer_backend_opengl_windows.odin
+++ b/renderer_backend_opengl_windows.odin
@@ -69,7 +69,7 @@ when RENDER_BACKEND_OPENGL {
         )
     }
 
-    opengl_set_clear_color :: proc(renderer: ^Renderer, color: [3]u8) {
+    opengl_set_clear_color :: proc(renderer: ^Renderer, color: RGB_Color) {
         gl.ClearColor(
             f32(color.r) / f32(max(u8)),
             f32(color.g) / f32(max(u8)),