Eevee: Fix GLSL compilation error.

Introduced by {35594f4b92fa4cbb5b848f447b7a3323e572b676}.
Some platforms do not support temp variables to be used as inout parameter.

Detected on Mac with Intel iGPU.

2 files changed, 8 insertions, 4 deletions

diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_eevee_specular.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_eevee_specular.glsl
index c81880184e3..530907859e9 100644
--- a/source/blender/gpu/shaders/material/gpu_shader_material_eevee_specular.glsl
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_eevee_specular.glsl
@@ -64,6 +64,8 @@ void node_eevee_specular(vec4 diffuse,
   else {
     result = closure_eval(diffuse_data, reflection_data);
   }
-  result = closure_add(result, closure_eval(emission_data));
-  result = closure_add(result, closure_eval(transparency_data));
+  Closure emission_cl = closure_eval(emission_data);
+  Closure transparency_cl = closure_eval(transparency_data);
+  result = closure_add(result, emission_cl);
+  result = closure_add(result, transparency_cl);
 }
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_principled.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_principled.glsl
index 033dc05c57d..2e695fa3e14 100644
--- a/source/blender/gpu/shaders/material/gpu_shader_material_principled.glsl
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_principled.glsl
@@ -169,6 +169,8 @@ void node_bsdf_principled(vec4 base_color,
     /* Un-optimized case. */
     result = closure_eval(diffuse_data, reflection_data, clearcoat_data, refraction_data);
   }
-  result = closure_add(result, closure_eval(emission_data));
-  result = closure_add(result, closure_eval(transparency_data));
+  Closure emission_cl = closure_eval(emission_data);
+  Closure transparency_cl = closure_eval(transparency_data);
+  result = closure_add(result, emission_cl);
+  result = closure_add(result, transparency_cl);
 }