Fix #130774: Overlay-Next: Edit Mesh Weights

Ensure all framebuffer attachments are written to.

Pull Request: https://projects.blender.org/blender/blender/pulls/130912

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

@@ -286,6 +286,7 @@ VERTEX_IN(0, VEC3, pos)
 VERTEX_IN(1, FLOAT, weight)
 SAMPLER(0, FLOAT_1D, weightTex)
 FRAGMENT_OUT(0, VEC4, fragColor)
+FRAGMENT_OUT(1, VEC4, lineOutput)
 VERTEX_OUT(overlay_edit_mesh_analysis_iface)
 VERTEX_SOURCE("overlay_edit_mesh_analysis_vert.glsl")
 FRAGMENT_SOURCE("overlay_edit_mesh_analysis_frag.glsl")

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

@@ -146,6 +146,7 @@ SAMPLER(0, FLOAT_1D, colorramp)
 PUSH_CONSTANT(FLOAT, opacity)     /* `1.0` by default. */
 PUSH_CONSTANT(BOOL, drawContours) /* `false` by default. */
 FRAGMENT_OUT(0, VEC4, fragColor)
+FRAGMENT_OUT(1, VEC4, lineOutput)
 VERTEX_SOURCE("overlay_paint_weight_vert.glsl")
 FRAGMENT_SOURCE("overlay_paint_weight_frag.glsl")
 ADDITIONAL_INFO(draw_modelmat)

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

@@ -5,4 +5,5 @@
 void main()
 {
   fragColor = weightColor;
+  lineOutput = vec4(0.0);
 }

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

@@ -99,4 +99,5 @@ void main()
   }
 
   fragColor = vec4(color.rgb, opacity);
+  lineOutput = vec4(0.0);
 }