Preferences: Add option to disable edit-mode wire Antialiasing

Requested by some users who prefer old wireframe precision.

Smooth wires are still enabled by defaults as they don't have a noticeable
perf impact.

Application restart is needed for changes to take effects.

8 files changed, 24 insertions, 7 deletions

diff --git a/source/blender/blenkernel/BKE_blender_version.h b/source/blender/blenkernel/BKE_blender_version.h
index 84d05c6b23c..a49081c5caa 100644
--- a/source/blender/blenkernel/BKE_blender_version.h
+++ b/source/blender/blenkernel/BKE_blender_version.h
@@ -24,7 +24,7 @@
  * and keep comment above the defines.
  * Use STRINGIFY() rather than defining with quotes */
 #define BLENDER_VERSION         280
-#define BLENDER_SUBVERSION      45
+#define BLENDER_SUBVERSION      46
 /* Several breakages with 280, e.g. collections vs layers */
 #define BLENDER_MINVERSION      280
 #define BLENDER_MINSUBVERSION   0
diff --git a/source/blender/blenloader/intern/versioning_280.c b/source/blender/blenloader/intern/versioning_280.c
index 51f7da4f31a..1179149bf90 100644
--- a/source/blender/blenloader/intern/versioning_280.c
+++ b/source/blender/blenloader/intern/versioning_280.c
@@ -2799,9 +2799,7 @@ void blo_do_versions_280(FileData *fd, Library *UNUSED(lib), Main *bmain)
 		}
 	}
 
-	{
-		/* Versioning code until next subversion bump goes here. */
-
+	if (!MAIN_VERSION_ATLEAST(bmain, 280, 46)) {
 		/* Add wireframe color. */
 		if (!DNA_struct_elem_find(fd->filesdna, "View3DShading", "char", "wire_color_type")) {
 			for (bScreen *screen = bmain->screen.first; screen; screen = screen->id.next) {
@@ -2826,4 +2824,8 @@ void blo_do_versions_280(FileData *fd, Library *UNUSED(lib), Main *bmain)
 			}
 		}
 	}
+
+	{
+		/* Versioning code until next subversion bump goes here. */
+	}
 }
diff --git a/source/blender/blenloader/intern/versioning_userdef.c b/source/blender/blenloader/intern/versioning_userdef.c
index 4366fb959c7..ef0cd7bc7d5 100644
--- a/source/blender/blenloader/intern/versioning_userdef.c
+++ b/source/blender/blenloader/intern/versioning_userdef.c
@@ -476,6 +476,10 @@ void BLO_version_defaults_userpref_blend(Main *bmain, UserDef *userdef)
 		        GP_PAINT_DEPRECATED_0);
 	}
 
+	if (!USER_VERSION_ATLEAST(280, 46)) {
+		userdef->uiflag2 |= USER_EDIT_MODE_SMOOTH_WIRE;
+	}
+
 	/**
 	 * Include next version bump.
 	 */
diff --git a/source/blender/draw/modes/edit_mesh_mode.c b/source/blender/draw/modes/edit_mesh_mode.c
index d599e390ca7..9afb9ce40a0 100644
--- a/source/blender/draw/modes/edit_mesh_mode.c
+++ b/source/blender/draw/modes/edit_mesh_mode.c
@@ -197,6 +197,7 @@ static void EDIT_MESH_engine_init(void *vedata)
 			geom_sh_code[0] = NULL;
 		}
 		const char *use_geom_def = use_geom_shader ? "#define USE_GEOM_SHADER\n" : "";
+		const char *use_smooth_def = (U.uiflag2 & USER_EDIT_MODE_SMOOTH_WIRE) ? "#define USE_SMOOTH_WIRE\n" : "";
 		sh_data->overlay_face = GPU_shader_create_from_arrays({
 		        .vert = (const char *[]){lib, datatoc_edit_mesh_overlay_vert_glsl, NULL},
 		        .frag = (const char *[]){datatoc_gpu_shader_3D_smooth_color_frag_glsl, NULL},
@@ -205,13 +206,13 @@ static void EDIT_MESH_engine_init(void *vedata)
 		sh_data->overlay_edge = GPU_shader_create_from_arrays({
 		        .vert = (const char *[]){lib, datatoc_edit_mesh_overlay_vert_glsl, NULL},
 		        .frag = (const char *[]){lib, datatoc_edit_mesh_overlay_frag_glsl, NULL},
-		        .defs = (const char *[]){sh_cfg_data->def, use_geom_def, "#define EDGE\n", NULL},
+		        .defs = (const char *[]){sh_cfg_data->def, use_geom_def, use_smooth_def, "#define EDGE\n", NULL},
 		        .geom = (use_geom_shader) ? geom_sh_code : NULL,
 		});
 		sh_data->overlay_edge_flat = GPU_shader_create_from_arrays({
 		        .vert = (const char *[]){lib, datatoc_edit_mesh_overlay_vert_glsl, NULL},
 		        .frag = (const char *[]){lib, datatoc_edit_mesh_overlay_frag_glsl, NULL},
-		        .defs = (const char *[]){sh_cfg_data->def, use_geom_def, "#define EDGE\n", "#define FLAT\n", NULL},
+		        .defs = (const char *[]){sh_cfg_data->def, use_geom_def, use_smooth_def, "#define EDGE\n", "#define FLAT\n", NULL},
 		        .geom = (use_geom_shader) ? geom_sh_code : NULL,
 		});
 		sh_data->overlay_vert = GPU_shader_create_from_arrays({
diff --git a/source/blender/draw/modes/shaders/edit_mesh_overlay_frag.glsl b/source/blender/draw/modes/shaders/edit_mesh_overlay_frag.glsl
index d48c5158872..dbad525c281 100644
--- a/source/blender/draw/modes/shaders/edit_mesh_overlay_frag.glsl
+++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_frag.glsl
@@ -24,7 +24,7 @@ void main()
 {
 	float dist = abs(edgeCoord_f) - max(sizeEdge * edgeScale - 0.5, 0.0);
 	float dist_outer = dist - max(sizeEdge * edgeScale, 1.0);
-#if 1
+#ifdef USE_SMOOTH_WIRE
 	float mix_w = smoothstep(GRID_LINE_SMOOTH_START, GRID_LINE_SMOOTH_END, dist);
 	float mix_w_outer = smoothstep(GRID_LINE_SMOOTH_START, GRID_LINE_SMOOTH_END, dist_outer);
 #else
diff --git a/source/blender/draw/modes/shaders/edit_mesh_overlay_geom.glsl b/source/blender/draw/modes/shaders/edit_mesh_overlay_geom.glsl
index b36c1ff869f..9a0bda3b81d 100644
--- a/source/blender/draw/modes/shaders/edit_mesh_overlay_geom.glsl
+++ b/source/blender/draw/modes/shaders/edit_mesh_overlay_geom.glsl
@@ -40,8 +40,11 @@ void main()
 	float half_size = sizeEdge * edgeScale;
 	/* Enlarge edge for flag display. */
 	half_size += (finalColorOuter_f.a > 0.0) ? max(sizeEdge * edgeScale, 1.0) : 0.0;
+
+#ifdef USE_SMOOTH_WIRE
 	/* Add 1 px for AA */
 	half_size += 0.5;
+#endif
 
 	vec3 edge_ofs = half_size * viewportSizeInv.xyy * vec3(1.0, 1.0, 0.0);
 
diff --git a/source/blender/makesdna/DNA_userdef_types.h b/source/blender/makesdna/DNA_userdef_types.h
index 932377fa718..048b7e60d57 100644
--- a/source/blender/makesdna/DNA_userdef_types.h
+++ b/source/blender/makesdna/DNA_userdef_types.h
@@ -899,6 +899,7 @@ typedef enum eUserpref_UI_Flag2 {
 	USER_UIFLAG2_DEPRECATED_0   = (1 << 0),
 	USER_REGION_OVERLAP			= (1 << 1),
 	USER_TRACKPAD_NATURAL		= (1 << 2),
+	USER_EDIT_MODE_SMOOTH_WIRE	= (1 << 3),
 } eUserpref_UI_Flag2;
 
 /** #UserDef.tablet_api */
diff --git a/source/blender/makesrna/intern/rna_userdef.c b/source/blender/makesrna/intern/rna_userdef.c
index cf79e4eec4b..9571fe9a4b3 100644
--- a/source/blender/makesrna/intern/rna_userdef.c
+++ b/source/blender/makesrna/intern/rna_userdef.c
@@ -4408,6 +4408,12 @@ static void rna_def_userdef_system(BlenderRNA *brna)
 	                         "Enable OpenGL multi-sampling, only for systems that support it, requires restart");
 	RNA_def_property_update(prop, 0, "rna_userdef_dpi_update");
 
+	prop = RNA_def_property(srna, "use_edit_mode_smooth_wire", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "uiflag2", USER_EDIT_MODE_SMOOTH_WIRE);
+	RNA_def_property_ui_text(prop, "Edit-Mode Smooth Wires",
+	                         "Enable Edit-Mode edge smoothing, reducing aliasing, requires restart");
+	RNA_def_property_update(prop, 0, "rna_userdef_dpi_update");
+
 	/* grease pencil anti-aliasing */
 	prop = RNA_def_property(srna, "gpencil_multi_sample", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_bitflag_sdna(prop, NULL, "gpencil_multisamples");