Refactor: Split demo effects and shaders into individual files

Split src/gpu/demo_effects.cc into individual .cc files for each effect
and created separate files for post-processing helpers and WGSL shaders.
Updated src/gpu/demo_effects.h to be a central header for all effect-related
declarations and adjusted CMakeLists.txt accordingly.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/gpu/effects/shaders.h b/src/gpu/effects/shaders.h
new file mode 100644
index 0000000..a23c41c
--- /dev/null
+++ b/src/gpu/effects/shaders.h
@@ -0,0 +1,16 @@
+// This file is part of the 64k demo project.
+// It declares the WGSL shader strings.
+
+#pragma once
+
+// Shader declarations (defined in shaders.cc)
+extern const char* main_shader_wgsl;
+extern const char* particle_compute_wgsl;
+extern const char* particle_render_wgsl;
+extern const char* passthrough_shader_wgsl;
+extern const char* ellipse_shader_wgsl;
+extern const char* particle_spray_compute_wgsl;
+extern const char* gaussian_blur_shader_wgsl;
+extern const char* solarize_shader_wgsl;
+extern const char* distort_shader_wgsl;
+extern const char* chroma_aberration_shader_wgsl;