From a958c6ca8dd48f642570037df127a4b23c984d82 Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Sat, 31 Jan 2026 17:05:15 +0100
Subject: feat: Multi-pass rendering architecture and effect stubs

Implements a post-processing pipeline using offscreen framebuffers. Adds stubs for MovingEllipse, ParticleSpray, GaussianBlur, Solarize, Distort, and ChromaAberration effects. Updates MainSequence to orchestrate the scene pass and post-processing chain.
---
 src/gpu/gpu.cc | 60 ++++++----------------------------------------------------
 1 file changed, 6 insertions(+), 54 deletions(-)

(limited to 'src/gpu/gpu.cc')

diff --git a/src/gpu/gpu.cc b/src/gpu/gpu.cc
index e76aecc..db79b9d 100644
--- a/src/gpu/gpu.cc
+++ b/src/gpu/gpu.cc
@@ -22,66 +22,20 @@
 
 // --- WebGPU Headers & Compatibility ---
 #if defined(DEMO_CROSS_COMPILE_WIN32)
-// Windows (MinGW) using wgpu-native v0.19.4.1
-#include <webgpu/webgpu.h>
-#include <webgpu/wgpu.h>
-
-// Type Shims
-using WGPUStringView = const char *;
-static const char *str_view(const char *str) {
-  return str;
-}
-static const char *label_view(const char *str) {
-  return str;
-}
-
 // Renamed Types/Enums
 #define WGPUSType_ShaderSourceWGSL WGPUSType_ShaderModuleWGSLDescriptor
 using WGPUShaderSourceWGSL = WGPUShaderModuleWGSLDescriptor;
-#define WGPUSurfaceGetCurrentTextureStatus_SuccessOptimal                      \
-  WGPUSurfaceGetCurrentTextureStatus_Success
-#define WGPUSurfaceGetCurrentTextureStatus_SuccessSuboptimal                   \
-  WGPUSurfaceGetCurrentTextureStatus_Success
-
-// Callback Mode Shim (Not used in old API signatures, but needed for ifdef
-// logic)
+#define WGPUSurfaceGetCurrentTextureStatus_SuccessOptimal WGPUSurfaceGetCurrentTextureStatus_Success
+#define WGPUSurfaceGetCurrentTextureStatus_SuccessSuboptimal WGPUSurfaceGetCurrentTextureStatus_Success
 #define WGPUCallbackMode_WaitAnyOnly 0
-
-// Wait Shim
-static void wgpuInstanceWaitAny(WGPUInstance instance, size_t, void *,
-                                uint64_t) {
+static void wgpuInstanceWaitAny(WGPUInstance instance, size_t, void *, uint64_t) {
   wgpuInstanceProcessEvents(instance);
 }
-
-// Uncaptured Error Callback Helper
 static void set_error_callback(WGPUDevice device, WGPUErrorCallback callback) {
   wgpuDeviceSetUncapturedErrorCallback(device, callback, nullptr);
 }
-
 #else
-// Native (macOS/Linux) using newer wgpu-native
-#include <webgpu.h>
-#include <wgpu.h>
-
-static WGPUStringView label_view(const char *str) {
-#ifndef STRIP_ALL
-  if (!str)
-    return {nullptr, 0};
-  return {str, strlen(str)};
-#else
-  (void)str;
-  return {nullptr, 0};
-#endif
-}
-
-static WGPUStringView str_view(const char *str) {
-  if (!str)
-    return {nullptr, 0};
-  return {str, strlen(str)};
-}
-
-static void set_error_callback(WGPUDevice device,
-                               WGPUUncapturedErrorCallback callback) {
+static void set_error_callback(WGPUDevice device, WGPUUncapturedErrorCallback callback) {
   // Handled in descriptor for new API.
 }
 #endif
@@ -353,7 +307,7 @@ static void handle_request_device(WGPURequestDeviceStatus status,
 #endif
 #endif
 
-void gpu_init(GLFWwindow *window) {
+void gpu_init(GLFWwindow *window, int width, int height) {
   g_instance = wgpuCreateInstance(nullptr);
   g_surface = platform_create_wgpu_surface(g_instance);
 
@@ -404,8 +358,6 @@ void gpu_init(GLFWwindow *window) {
   wgpuSurfaceGetCapabilities(g_surface, g_adapter, &caps);
   WGPUTextureFormat swap_chain_format = caps.formats[0];
 
-  int width, height;
-  glfwGetFramebufferSize(window, &width, &height);
   g_config.device = g_device;
   g_config.format = swap_chain_format;
   g_config.usage = WGPUTextureUsage_RenderAttachment;
@@ -415,7 +367,7 @@ void gpu_init(GLFWwindow *window) {
   g_config.alphaMode = WGPUCompositeAlphaMode_Opaque;
   wgpuSurfaceConfigure(g_surface, &g_config);
 
-  g_main_sequence.init(g_device, g_queue, g_config.format);
+  g_main_sequence.init(g_device, g_queue, g_config.format, width, height);
 
   LoadTimeline(g_main_sequence, g_device, g_queue, g_config.format);
 }
-- 
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