1 files changed, 117 insertions, 0 deletions
diff --git a/src/tests/gpu/test_gpu_procedural.cc b/src/tests/gpu/test_gpu_procedural.cc
new file mode 100644
index 0000000..f1bade0
--- /dev/null
+++ b/src/tests/gpu/test_gpu_procedural.cc
@@ -0,0 +1,117 @@
+// This file is part of the 64k demo project.
+// Tests GPU procedural texture generation.
+
+#include "gpu/gpu.h"
+#include "gpu/texture_manager.h"
+#include "platform/platform.h"
+#include <cstdio>
+
+int main() {
+  printf("GPU Procedural Test: Starting...\n");
+
+  // Minimal GPU initialization for testing
+  PlatformState platform = platform_init(false, 256, 256);
+  if (!platform.window) {
+    fprintf(stderr, "Error: Failed to create window\n");
+    return 1;
+  }
+
+  gpu_init(&platform);
+  const GpuContext* ctx = gpu_get_context();
+
+  // Initialize shader composer (needed for #include resolution)
+  extern void InitShaderComposer();
+  InitShaderComposer();
+
+  // Create TextureManager
+  TextureManager tex_mgr;
+  tex_mgr.init(ctx->device, ctx->queue);
+
+  // Test GPU noise generation
+  GpuProceduralParams params = {};
+  params.width = 256;
+  params.height = 256;
+  float proc_params[2] = {0.0f, 4.0f}; // seed, frequency
+  params.params = proc_params;
+  params.num_params = 2;
+
+  tex_mgr.create_gpu_noise_texture("test_noise", params);
+
+  // Verify texture exists
+  WGPUTextureView view = tex_mgr.get_texture_view("test_noise");
+  if (!view) {
+    fprintf(stderr, "Error: GPU noise texture not created\n");
+    tex_mgr.shutdown();
+    gpu_shutdown();
+    return 1;
+  }
+  printf("SUCCESS: GPU noise texture created (256x256)\n");
+
+  // Test pipeline caching (create second noise texture)
+  tex_mgr.create_gpu_noise_texture("test_noise_2", params);
+  WGPUTextureView view2 = tex_mgr.get_texture_view("test_noise_2");
+  if (!view2) {
+    fprintf(stderr, "Error: Second GPU noise texture not created\n");
+    tex_mgr.shutdown();
+    gpu_shutdown();
+    return 1;
+  }
+  printf("SUCCESS: Pipeline caching works (second noise texture)\n");
+
+  // Test GPU perlin generation
+  float perlin_params[5] = {42.0f, 4.0f, 1.0f, 0.5f, 6.0f};
+  GpuProceduralParams perlin = {512, 256, perlin_params, 5};
+  tex_mgr.create_gpu_perlin_texture("test_perlin", perlin);
+  WGPUTextureView perlin_view = tex_mgr.get_texture_view("test_perlin");
+  if (!perlin_view) {
+    fprintf(stderr, "Error: GPU perlin texture not created\n");
+    tex_mgr.shutdown();
+    gpu_shutdown();
+    return 1;
+  }
+  printf("SUCCESS: GPU perlin texture created (512x256)\n");
+
+  // Test GPU grid generation
+  float grid_params[2] = {32.0f, 2.0f};
+  GpuProceduralParams grid = {256, 256, grid_params, 2};
+  tex_mgr.create_gpu_grid_texture("test_grid", grid);
+  WGPUTextureView grid_view = tex_mgr.get_texture_view("test_grid");
+  if (!grid_view) {
+    fprintf(stderr, "Error: GPU grid texture not created\n");
+    tex_mgr.shutdown();
+    gpu_shutdown();
+    return 1;
+  }
+  printf("SUCCESS: GPU grid texture created (256x256)\n");
+
+  // Test multiple pipelines coexist
+  printf("SUCCESS: All three GPU generators work (unified pipeline system)\n");
+
+  // Test variable-size textures
+  float noise_small[2] = {999.0f, 8.0f};
+  GpuProceduralParams small = {128, 64, noise_small, 2};
+  tex_mgr.create_gpu_noise_texture("noise_128x64", small);
+  if (!tex_mgr.get_texture_view("noise_128x64")) {
+    fprintf(stderr, "Error: Variable-size texture (128x64) not created\n");
+    tex_mgr.shutdown();
+    gpu_shutdown();
+    return 1;
+  }
+
+  float noise_large[2] = {777.0f, 2.0f};
+  GpuProceduralParams large = {1024, 512, noise_large, 2};
+  tex_mgr.create_gpu_noise_texture("noise_1024x512", large);
+  if (!tex_mgr.get_texture_view("noise_1024x512")) {
+    fprintf(stderr, "Error: Variable-size texture (1024x512) not created\n");
+    tex_mgr.shutdown();
+    gpu_shutdown();
+    return 1;
+  }
+  printf("SUCCESS: Variable-size textures work (128x64, 1024x512)\n");
+
+  // Cleanup
+  tex_mgr.shutdown();
+  gpu_shutdown();
+  platform_shutdown(&platform);
+  return 0;
+}