GPUShaderCreateInfo: Add manual validation of bindpoints

Some drivers/glsl compilers will not warn about multiple resources using
the same binding, creating silent errors.

This patch checks for this case and outputs a descriptive error message if
a particular createInfo merge error is founds.

Other validation can be added later.

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/gpu/intern/gpu_shader_create_info.hh b/source/blender/gpu/intern/gpu_shader_create_info.hh
index a1ebdb0ec51..c7b3ac5ca37 100644
--- a/source/blender/gpu/intern/gpu_shader_create_info.hh
+++ b/source/blender/gpu/intern/gpu_shader_create_info.hh
@@ -597,6 +597,9 @@ struct ShaderCreateInfo {
   /* WARNING: Recursive. */
   void finalize();
 
+  /** Error detection that some backend compilers do not complain about. */
+  void validate(const ShaderCreateInfo &other_info);
+
   /** \} */
 };