Viewport: Add adjustable safe areas, 3d-view & VSE

Also adds safe-area presets.

D325 by Diego Gangl with own edits.

17 files changed, 204 insertions, 41 deletions

diff --git a/source/blender/blenkernel/BKE_scene.h b/source/blender/blenkernel/BKE_scene.h
index eac4f6a56a5..149472db8fa 100644
--- a/source/blender/blenkernel/BKE_scene.h
+++ b/source/blender/blenkernel/BKE_scene.h
@@ -39,6 +39,7 @@ extern "C" {
 
 struct AviCodecData;
 struct Base;
+struct DisplaySafeAreas;
 struct EvaluationContext;
 struct bglMats;
 struct Main;
diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index 13e9b7fb0c4..577dbd6d323 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -689,6 +689,12 @@ Scene *BKE_scene_add(Main *bmain, const char *name)
 	BLI_strncpy(sce->sequencer_colorspace_settings.name, colorspace_name,
 	            sizeof(sce->sequencer_colorspace_settings.name));
 
+	/* Safe Areas */
+	copy_v2_fl2(sce->safe_areas.title, 3.5f / 100.0f, 3.5f / 100.0f);
+	copy_v2_fl2(sce->safe_areas.action, 10.0f / 100.0f, 5.0f / 100.0f);
+	copy_v2_fl2(sce->safe_areas.title_center, 17.5f / 100.0f, 5.0f / 100.0f);
+	copy_v2_fl2(sce->safe_areas.action_center, 15.0f / 100.0f, 5.0f / 100.0f);
+
 	return sce;
 }
 
diff --git a/source/blender/blenloader/intern/versioning_270.c b/source/blender/blenloader/intern/versioning_270.c
index e6e43758e11..bde3f0f2512 100644
--- a/source/blender/blenloader/intern/versioning_270.c
+++ b/source/blender/blenloader/intern/versioning_270.c
@@ -458,4 +458,18 @@ void blo_do_versions_270(FileData *fd, Library *UNUSED(lib), Main *main)
 #undef BRUSH_RAKE
 #undef BRUSH_RANDOM_ROTATION
 	}
+
+	/* Customizable Safe Areas */
+	if (!MAIN_VERSION_ATLEAST(main, 273, 2)) {
+		if (!DNA_struct_elem_find(fd->filesdna, "Scene", "DisplaySafeAreas", "safe_areas")) {
+			Scene *scene;
+
+			for (scene = main->scene.first; scene; scene = scene->id.next) {
+				copy_v2_fl2(scene->safe_areas.title, 3.5f / 100.0f, 3.5f / 100.0f);
+				copy_v2_fl2(scene->safe_areas.action, 10.0f / 100.0f, 5.0f / 100.0f);
+				copy_v2_fl2(scene->safe_areas.title_center, 17.5f / 100.0f, 5.0f / 100.0f);
+				copy_v2_fl2(scene->safe_areas.action_center, 15.0f / 100.0f, 5.0f / 100.0f);
+			}
+		}
+	}
 }
diff --git a/source/blender/blenloader/intern/versioning_legacy.c b/source/blender/blenloader/intern/versioning_legacy.c
index 6f298923397..a28ca7d187a 100644
--- a/source/blender/blenloader/intern/versioning_legacy.c
+++ b/source/blender/blenloader/intern/versioning_legacy.c
@@ -2183,8 +2183,8 @@ void blo_do_versions_pre250(FileData *fd, Library *lib, Main *main)
 				cam->flag |= CAM_SHOWPASSEPARTOUT;
 
 			/* make sure old cameras have title safe on */
-			if (!(cam->flag & CAM_SHOWTITLESAFE))
-				cam->flag |= CAM_SHOWTITLESAFE;
+			if (!(cam->flag & CAM_SHOW_SAFE_MARGINS))
+				cam->flag |= CAM_SHOW_SAFE_MARGINS;
 
 			/* set an appropriate camera passepartout alpha */
 			if (!(cam->passepartalpha))
diff --git a/source/blender/editors/include/UI_interface.h b/source/blender/editors/include/UI_interface.h
index 8789e837f17..159fda89f59 100644
--- a/source/blender/editors/include/UI_interface.h
+++ b/source/blender/editors/include/UI_interface.h
@@ -316,6 +316,10 @@ void UI_draw_roundbox_shade_x(int mode, float minx, float miny, float maxx, floa
 void UI_draw_roundbox_shade_y(int mode, float minx, float miny, float maxx, float maxy, float rad, float shadeLeft, float shadeRight);
 void UI_draw_text_underline(int pos_x, int pos_y, int len, int height);
 
+void UI_draw_safe_areas(
+        float x1, float x2, float y1, float y2,
+        const float title_aspect[2], const float action_aspect[2]);
+
 /* state for scrolldrawing */
 #define UI_SCROLL_PRESSED       (1 << 0)
 #define UI_SCROLL_ARROWS        (1 << 1)
diff --git a/source/blender/editors/interface/interface_draw.c b/source/blender/editors/interface/interface_draw.c
index bcd9b9a5547..cca4df30811 100644
--- a/source/blender/editors/interface/interface_draw.c
+++ b/source/blender/editors/interface/interface_draw.c
@@ -450,6 +450,51 @@ void ui_draw_but_IMAGE(ARegion *UNUSED(ar), uiBut *but, uiWidgetColors *UNUSED(w
 #endif
 }
 
+/**
+ * Draw title and text safe areas.
+ *
+ * The first 4 parameters are the offsets for the view, not the zones.
+ */
+void UI_draw_safe_areas(
+        float x1, float x2, float y1, float y2,
+        const float title_aspect[2], const float action_aspect[2])
+{
+	const float size_x_half = (x2 - x1) * 0.5f;
+	const float size_y_half = (y2 - y1) * 0.5f;
+
+	const float *safe_areas[] = {title_aspect, action_aspect};
+	int i, safe_len = ARRAY_SIZE(safe_areas);
+	bool is_first = true;
+
+	for (i = 0; i < safe_len; i++) {
+		if (safe_areas[i][0] || safe_areas[i][1]) {
+			float margin_x, margin_y;
+			float minx, miny, maxx, maxy;
+
+			if (is_first) {
+				UI_ThemeColorBlendShade(TH_VIEW_OVERLAY, TH_BACK, 0.25f, 0);
+				is_first = false;
+			}
+
+			margin_x = safe_areas[i][0] * size_x_half;
+			margin_y = safe_areas[i][1] * size_y_half;
+
+			minx = x1 + margin_x;
+			miny = y1 + margin_y;
+			maxx = x2 - margin_x;
+			maxy = y2 - margin_y;
+
+			glBegin(GL_LINE_LOOP);
+			glVertex2f(maxx, miny);
+			glVertex2f(maxx, maxy);
+			glVertex2f(minx, maxy);
+			glVertex2f(minx, miny);
+			glEnd();
+		}
+	}
+}
+
+
 static void draw_scope_end(const rctf *rect, GLint *scissor)
 {
 	/* restore scissortest */
diff --git a/source/blender/editors/space_sequencer/sequencer_draw.c b/source/blender/editors/space_sequencer/sequencer_draw.c
index afb650f8cfd..3233c4192b9 100644
--- a/source/blender/editors/space_sequencer/sequencer_draw.c
+++ b/source/blender/editors/space_sequencer/sequencer_draw.c
@@ -1292,24 +1292,18 @@ void draw_image_seq(const bContext *C, Scene *scene, ARegion *ar, SpaceSeq *sseq
 		glEnd();
 
 		/* safety border */
-		if ((sseq->flag & SEQ_DRAW_SAFE_MARGINS) != 0) {
-			float fac = 0.1;
-
-			float a = fac * (x2 - x1);
-			x1 += a;
-			x2 -= a;
-
-			a = fac * (y2 - y1);
-			y1 += a;
-			y2 -= a;
-
-			glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
-
-			UI_draw_roundbox_corner_set(UI_CNR_ALL);
-			UI_draw_roundbox_gl_mode(GL_LINE_LOOP, x1, y1, x2, y2, 12.0);
-
-			glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
-
+		if (sseq->flag & SEQ_SHOW_SAFE_MARGINS) {
+			UI_draw_safe_areas(
+			        x1, x2, y1, y2,
+			        scene->safe_areas.title,
+			        scene->safe_areas.action);
+
+			if (sseq->flag & SEQ_SHOW_SAFE_CENTER) {
+				UI_draw_safe_areas(
+				        x1, x2, y1, y2,
+				        scene->safe_areas.title_center,
+				        scene->safe_areas.action_center);
+			}
 		}
 
 		setlinestyle(0);
diff --git a/source/blender/editors/space_sequencer/space_sequencer.c b/source/blender/editors/space_sequencer/space_sequencer.c
index 6231f02907a..4d97056c4c5 100644
--- a/source/blender/editors/space_sequencer/space_sequencer.c
+++ b/source/blender/editors/space_sequencer/space_sequencer.c
@@ -599,6 +599,7 @@ static void sequencer_preview_area_listener(bScreen *UNUSED(sc), ScrArea *UNUSED
 				case ND_MARKERS:
 				case ND_SEQUENCER:
 				case ND_RENDER_OPTIONS:
+				case ND_DRAW_RENDER_VIEWPORT:
 					ED_region_tag_redraw(ar);
 					break;
 			}
diff --git a/source/blender/editors/space_view3d/space_view3d.c b/source/blender/editors/space_view3d/space_view3d.c
index d0ba3a9f793..17cecc3dc1d 100644
--- a/source/blender/editors/space_view3d/space_view3d.c
+++ b/source/blender/editors/space_view3d/space_view3d.c
@@ -817,6 +817,16 @@ static void view3d_main_area_listener(bScreen *sc, ScrArea *sa, ARegion *ar, wmN
 				case ND_WORLD:
 					/* handled by space_view3d_listener() for v3d access */
 					break;
+				case ND_DRAW_RENDER_VIEWPORT:
+				{
+					if (v3d->camera && (scene == wmn->reference)) {
+						RegionView3D *rv3d = ar->regiondata;
+						if (rv3d->persp == RV3D_CAMOB) {
+							ED_region_tag_redraw(ar);
+						}
+					}
+					break;
+				}
 			}
 			if (wmn->action == NA_EDITED)
 				ED_region_tag_redraw(ar);
diff --git a/source/blender/editors/space_view3d/view3d_draw.c b/source/blender/editors/space_view3d/view3d_draw.c
index 65721d52dff..24050697585 100644
--- a/source/blender/editors/space_view3d/view3d_draw.c
+++ b/source/blender/editors/space_view3d/view3d_draw.c
@@ -1066,14 +1066,13 @@ static void drawviewborder_triangle(float x1, float x2, float y1, float y2, cons
 
 static void drawviewborder(Scene *scene, ARegion *ar, View3D *v3d)
 {
-	float hmargin, vmargin;
 	float x1, x2, y1, y2;
 	float x1i, x2i, y1i, y2i;
 
 	rctf viewborder;
 	Camera *ca = NULL;
 	RegionView3D *rv3d = ar->regiondata;
-	
+
 	if (v3d->camera == NULL)
 		return;
 	if (v3d->camera->type == OB_CAMERA)
@@ -1225,17 +1224,20 @@ static void drawviewborder(Scene *scene, ARegion *ar, View3D *v3d)
 			drawviewborder_triangle(x1, x2, y1, y2, 1, 'B');
 		}
 
-		if (ca->flag & CAM_SHOWTITLESAFE) {
-			UI_ThemeColorBlendShade(TH_VIEW_OVERLAY, TH_BACK, 0.25, 0);
-
-			hmargin = 0.1f  * (x2 - x1);
-			vmargin = 0.05f * (y2 - y1);
-			UI_draw_roundbox_gl_mode(GL_LINE_LOOP, x1 + hmargin, y1 + vmargin, x2 - hmargin, y2 - vmargin, 2.0f);
+		if (ca->flag & CAM_SHOW_SAFE_MARGINS) {
+			UI_draw_safe_areas(
+			        x1, x2, y1, y2,
+			        scene->safe_areas.title,
+			        scene->safe_areas.action);
 
-			hmargin = 0.035f * (x2 - x1);
-			vmargin = 0.035f * (y2 - y1);
-			UI_draw_roundbox_gl_mode(GL_LINE_LOOP, x1 + hmargin, y1 + vmargin, x2 - hmargin, y2 - vmargin, 2.0f);
+			if (ca->flag & CAM_SHOW_SAFE_CENTER) {
+				UI_draw_safe_areas(
+				        x1, x2, y1, y2,
+				        scene->safe_areas.title_center,
+				        scene->safe_areas.action_center);
+			}
 		}
+
 		if (ca->flag & CAM_SHOWSENSOR) {
 			/* determine sensor fit, and get sensor x/y, for auto fit we
 			 * assume and square sensor and only use sensor_x */
diff --git a/source/blender/makesdna/DNA_camera_types.h b/source/blender/makesdna/DNA_camera_types.h
index c99494ce00e..da7d98d2b22 100644
--- a/source/blender/makesdna/DNA_camera_types.h
+++ b/source/blender/makesdna/DNA_camera_types.h
@@ -56,7 +56,7 @@ typedef struct Camera {
 	float lens, ortho_scale, drawsize;
 	float sensor_x, sensor_y;
 	float shiftx, shifty;
-	
+
 	/* yafray: dof params */
 	/* qdn: yafray var 'YF_dofdist' now enabled for defocus composite node as well.
 	 * The name was not changed so that no other files need to be modified */
@@ -96,12 +96,13 @@ enum {
 	CAM_SHOWLIMITS          = (1 << 0),
 	CAM_SHOWMIST            = (1 << 1),
 	CAM_SHOWPASSEPARTOUT    = (1 << 2),
-	CAM_SHOWTITLESAFE       = (1 << 3),
+	CAM_SHOW_SAFE_MARGINS       = (1 << 3),
 	CAM_SHOWNAME            = (1 << 4),
 	CAM_ANGLETOGGLE         = (1 << 5),
 	CAM_DS_EXPAND           = (1 << 6),
 	CAM_PANORAMA            = (1 << 7), /* deprecated */
 	CAM_SHOWSENSOR          = (1 << 8),
+	CAM_SHOW_SAFE_CENTER    = (1 << 9),
 };
 
 #if (DNA_DEPRECATED_GCC_POISON == 1)
diff --git a/source/blender/makesdna/DNA_scene_types.h b/source/blender/makesdna/DNA_scene_types.h
index 49f8b3cd4d0..9371170a004 100644
--- a/source/blender/makesdna/DNA_scene_types.h
+++ b/source/blender/makesdna/DNA_scene_types.h
@@ -1216,6 +1216,21 @@ typedef struct PhysicsSettings {
 	int flag, quick_cache_step, rt;
 } PhysicsSettings;
 
+/* ------------------------------------------- */
+/* Safe Area options used in Camera View & VSE
+ */
+typedef struct DisplaySafeAreas {
+	/* each value represents the (x,y) margins as a multiplier.
+	 * 'center' in this context is just the name for a different kind of safe-area */
+
+	float title[2];		/* Title Safe */
+	float action[2];	/* Image/Graphics Safe */
+
+	/* use for alternate aspect ratio */
+	float title_center[2];
+	float action_center[2];
+} DisplaySafeAreas;
+
 /* *************************************************************** */
 /* Scene ID-Block */
 
@@ -1251,6 +1266,7 @@ typedef struct Scene {
 	
 	struct ToolSettings *toolsettings;		/* default allocated now */
 	struct SceneStats *stats;				/* default allocated now */
+	struct DisplaySafeAreas safe_areas;
 
 	/* migrate or replace? depends on some internal things... */
 	/* no, is on the right place (ton) */
diff --git a/source/blender/makesdna/DNA_space_types.h b/source/blender/makesdna/DNA_space_types.h
index 82ab0cce30c..723964364f6 100644
--- a/source/blender/makesdna/DNA_space_types.h
+++ b/source/blender/makesdna/DNA_space_types.h
@@ -528,12 +528,13 @@ typedef enum eSpaceSeq_Flag {
 	SEQ_DRAWFRAMES              = (1 << 0),
 	SEQ_MARKER_TRANS            = (1 << 1),
 	SEQ_DRAW_COLOR_SEPARATED    = (1 << 2),
-	SEQ_DRAW_SAFE_MARGINS       = (1 << 3),
+	SEQ_SHOW_SAFE_MARGINS       = (1 << 3),
 	SEQ_SHOW_GPENCIL            = (1 << 4),
 	SEQ_NO_DRAW_CFRANUM         = (1 << 5),
 	SEQ_USE_ALPHA               = (1 << 6), /* use RGBA display mode for preview */
 	SEQ_ALL_WAVEFORMS           = (1 << 7), /* draw all waveforms */
 	SEQ_NO_WAVEFORMS            = (1 << 8), /* draw no waveforms */
+	SEQ_SHOW_SAFE_CENTER        = (1 << 9),
 } eSpaceSeq_Flag;
 
 /* sseq->view */
diff --git a/source/blender/makesrna/RNA_access.h b/source/blender/makesrna/RNA_access.h
index 6167164a7ac..34c2e5a3f25 100644
--- a/source/blender/makesrna/RNA_access.h
+++ b/source/blender/makesrna/RNA_access.h
@@ -203,6 +203,7 @@ extern StructRNA RNA_DataTransferModifier;
 extern StructRNA RNA_DecimateModifier;
 extern StructRNA RNA_DelaySensor;
 extern StructRNA RNA_DisplaceModifier;
+extern StructRNA RNA_DisplaySafeAreas;
 extern StructRNA RNA_DistortedNoiseTexture;
 extern StructRNA RNA_DomainFluidSettings;
 extern StructRNA RNA_DopeSheet;
diff --git a/source/blender/makesrna/intern/rna_camera.c b/source/blender/makesrna/intern/rna_camera.c
index 9f119b33889..5704004b4b6 100644
--- a/source/blender/makesrna/intern/rna_camera.c
+++ b/source/blender/makesrna/intern/rna_camera.c
@@ -258,9 +258,14 @@ void RNA_def_camera(BlenderRNA *brna)
 	                         "Show a darkened overlay outside the image area in Camera view");
 	RNA_def_property_update(prop, NC_CAMERA | ND_DRAW_RENDER_VIEWPORT, NULL);
 
-	prop = RNA_def_property(srna, "show_title_safe", PROP_BOOLEAN, PROP_NONE);
-	RNA_def_property_boolean_sdna(prop, NULL, "flag", CAM_SHOWTITLESAFE);
-	RNA_def_property_ui_text(prop, "Show Safe Areas", "Show TV title safe and action safe zones in Camera view");
+	prop = RNA_def_property(srna, "show_safe_areas", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", CAM_SHOW_SAFE_MARGINS);
+	RNA_def_property_ui_text(prop, "Show Safe Areas", "Show TV title safe and action safe areas in Camera view");
+	RNA_def_property_update(prop, NC_CAMERA | ND_DRAW_RENDER_VIEWPORT, NULL);
+
+	prop = RNA_def_property(srna, "show_safe_center", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", CAM_SHOW_SAFE_CENTER);
+	RNA_def_property_ui_text(prop, "Show Center-cut safe areas", "Show safe areas to fit content in a different aspect ratio");
 	RNA_def_property_update(prop, NC_CAMERA | ND_DRAW_RENDER_VIEWPORT, NULL);
 
 	prop = RNA_def_property(srna, "show_name", PROP_BOOLEAN, PROP_NONE);
diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index d9587b8d983..57d50958e2c 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -5390,6 +5390,55 @@ static void rna_def_selected_uv_element(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Face Index", "");
 }
 
+static void rna_def_display_safe_areas(BlenderRNA *brna)
+{
+	StructRNA *srna;
+	PropertyRNA *prop;
+
+	static float default_title[2] = {0.035f, 0.035f};
+	static float default_action[2] = {0.1f, 0.05f};
+
+	static float default_title_center[2] = {0.175f, 0.05f};
+	static float default_action_center[2] = {0.15f, 0.05f};
+
+	srna = RNA_def_struct(brna, "DisplaySafeAreas", NULL);
+	RNA_def_struct_ui_text(srna, "Safe Areas", "Safe Areas used in 3D view and the VSE");
+	RNA_def_struct_sdna(srna, "DisplaySafeAreas");
+
+	/* SAFE AREAS */
+	prop = RNA_def_property(srna, "title", PROP_FLOAT, PROP_XYZ);
+	RNA_def_property_float_sdna(prop, NULL, "title");
+	RNA_def_property_array(prop, 2);
+	RNA_def_property_range(prop, 0.0f, 1.0f);
+	RNA_def_property_float_array_default(prop, default_title);
+	RNA_def_property_ui_text(prop, "Title Safe margins", "Safe area for text and graphics");
+	RNA_def_property_update(prop, NC_SCENE | ND_DRAW_RENDER_VIEWPORT, NULL);
+
+	prop = RNA_def_property(srna, "action", PROP_FLOAT, PROP_XYZ);
+	RNA_def_property_float_sdna(prop, NULL, "action");
+	RNA_def_property_array(prop, 2);
+	RNA_def_property_float_array_default(prop, default_action);
+	RNA_def_property_range(prop, 0.0f, 1.0f);
+	RNA_def_property_ui_text(prop, "Action Safe Margins", "Safe area for general elements");
+	RNA_def_property_update(prop, NC_SCENE | ND_DRAW_RENDER_VIEWPORT, NULL);
+
+
+	prop = RNA_def_property(srna, "title_center", PROP_FLOAT, PROP_XYZ);
+	RNA_def_property_float_sdna(prop, NULL, "title_center");
+	RNA_def_property_array(prop, 2);
+	RNA_def_property_float_array_default(prop, default_title_center);
+	RNA_def_property_range(prop, 0.0f, 1.0f);
+	RNA_def_property_ui_text(prop, "Center Title Safe Margins", "Safe area for text and graphics in a different aspect ratio");
+	RNA_def_property_update(prop, NC_SCENE | ND_DRAW_RENDER_VIEWPORT, NULL);
+
+	prop = RNA_def_property(srna, "action_center", PROP_FLOAT, PROP_XYZ);
+	RNA_def_property_float_sdna(prop, NULL, "action_center");
+	RNA_def_property_array(prop, 2);
+	RNA_def_property_float_array_default(prop, default_action_center);
+	RNA_def_property_range(prop, 0.0f, 1.0f);
+	RNA_def_property_ui_text(prop, "Center Action Safe Margins", "Safe area for general elements in a different aspect ratio");
+	RNA_def_property_update(prop, NC_SCENE | ND_DRAW_RENDER_VIEWPORT, NULL);
+}
 
 
 void RNA_def_scene(BlenderRNA *brna)
@@ -5685,6 +5734,13 @@ void RNA_def_scene(BlenderRNA *brna)
 	RNA_def_property_struct_type(prop, "RenderSettings");
 	RNA_def_property_ui_text(prop, "Render Data", "");
 	
+	/* Safe Areas */
+	prop = RNA_def_property(srna, "safe_areas", PROP_POINTER, PROP_NONE);
+	RNA_def_property_pointer_sdna(prop, NULL, "safe_areas");
+	RNA_def_property_flag(prop, PROP_NEVER_NULL);
+	RNA_def_property_struct_type(prop, "DisplaySafeAreas");
+	RNA_def_property_ui_text(prop, "Safe Areas", "");
+
 	/* Markers */
 	prop = RNA_def_property(srna, "timeline_markers", PROP_COLLECTION, PROP_NONE);
 	RNA_def_property_collection_sdna(prop, NULL, "markers", NULL);
@@ -5799,6 +5855,7 @@ void RNA_def_scene(BlenderRNA *brna)
 	rna_def_scene_game_data(brna);
 	rna_def_transform_orientation(brna);
 	rna_def_selected_uv_element(brna);
+	rna_def_display_safe_areas(brna);
 	RNA_define_animate_sdna(true);
 	/* *** Animated *** */
 	rna_def_scene_render_data(brna);
diff --git a/source/blender/makesrna/intern/rna_space.c b/source/blender/makesrna/intern/rna_space.c
index d1d39d65913..58476c43b73 100644
--- a/source/blender/makesrna/intern/rna_space.c
+++ b/source/blender/makesrna/intern/rna_space.c
@@ -2570,11 +2570,16 @@ static void rna_def_space_sequencer(BlenderRNA *brna)
 	RNA_def_property_ui_text(prop, "Separate Colors", "Separate color channels in preview");
 	RNA_def_property_update(prop, NC_SPACE | ND_SPACE_SEQUENCER, NULL);
 
-	prop = RNA_def_property(srna, "show_safe_margin", PROP_BOOLEAN, PROP_NONE);
-	RNA_def_property_boolean_sdna(prop, NULL, "flag", SEQ_DRAW_SAFE_MARGINS);
-	RNA_def_property_ui_text(prop, "Safe Margin", "Draw title safe margins in preview");
+	prop = RNA_def_property(srna, "show_safe_areas", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", SEQ_SHOW_SAFE_MARGINS);
+	RNA_def_property_ui_text(prop, "Safe Areas", "Show TV title safe and action safe areas in preview");
 	RNA_def_property_update(prop, NC_SPACE | ND_SPACE_SEQUENCER, NULL);
-	
+
+	prop = RNA_def_property(srna, "show_safe_center", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "flag", SEQ_SHOW_SAFE_CENTER);
+	RNA_def_property_ui_text(prop, "Center-Cut Safe Areas", "Show safe areas to fit content in a different aspect ratio");
+	RNA_def_property_update(prop, NC_SPACE | ND_SPACE_SEQUENCER, NULL);
+
 	prop = RNA_def_property(srna, "show_seconds", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_negative_sdna(prop, NULL, "flag", SEQ_DRAWFRAMES);
 	RNA_def_property_ui_text(prop, "Show Seconds", "Show timing in seconds not frames");