Fix: Overlay-Next: Broken edit mode on some Nvidia GPU / drivers

One of the framebuffer output was not written to.

source/blender/draw/engines/overlay/shaders/infos/overlay_edit_mode_info.hh

@@ -21,7 +21,9 @@ GPU_SHADER_INTERFACE_END()
 GPU_SHADER_CREATE_INFO(overlay_edit_mesh_common)
 DEFINE_VALUE("blender_srgb_to_framebuffer_space(a)", "a")
 SAMPLER(0, DEPTH_2D, depthTex)
+DEFINE("LINE_OUTPUT")
 FRAGMENT_OUT(0, VEC4, fragColor)
+FRAGMENT_OUT(1, VEC4, lineOutput)
 PUSH_CONSTANT(BOOL, wireShading)
 PUSH_CONSTANT(BOOL, selectFace)
 PUSH_CONSTANT(BOOL, selectEdge)
@@ -35,8 +37,10 @@ GPU_SHADER_CREATE_END()
 GPU_SHADER_CREATE_INFO(overlay_edit_mesh_common_no_geom)
 METAL_BACKEND_ONLY()
 DEFINE_VALUE("blender_srgb_to_framebuffer_space(a)", "a")
+DEFINE("LINE_OUTPUT")
 SAMPLER(0, DEPTH_2D, depthTex)
 FRAGMENT_OUT(0, VEC4, fragColor)
+FRAGMENT_OUT(1, VEC4, lineOutput)
 PUSH_CONSTANT(BOOL, wireShading)
 PUSH_CONSTANT(BOOL, selectFace)
 PUSH_CONSTANT(BOOL, selectEdge)

source/blender/draw/engines/overlay/shaders/overlay_edit_mesh_frag.glsl

@@ -45,4 +45,5 @@ void main()
   fragColor.a *= 1.0 - (geometry_flat_out.finalColorOuter.a > 0.0 ? mix_w_outer : mix_w);
 
   fragColor.a *= test_occlusion() ? alpha : 1.0;
+  lineOutput = vec4(0.0);
 }

source/blender/draw/engines/overlay/shaders/overlay_point_varying_color_frag.glsl

@@ -25,5 +25,9 @@ void main()
 #else
   fragColor = finalColor;
 #endif
+
+#ifdef LINE_OUTPUT
+  lineOutput = vec4(0.0);
+#endif
   select_id_output(select_id);
 }

source/blender/draw/engines/overlay/shaders/overlay_varying_color.glsl

@@ -7,5 +7,8 @@
 void main()
 {
   fragColor = finalColor;
+#ifdef LINE_OUTPUT
+  lineOutput = vec4(0.0);
+#endif
   select_id_output(select_id);
 }