Fix Text Boxes not drawing

I'm using a different shading group for the active text box and the others.
This way I can assign different colors to them.

The alternative would be to create a new `shgroup_dynlines_dashed_flat_color`,
but I find this overkill for such a simple use case.

1 files changed, 70 insertions, 0 deletions

diff --git a/source/blender/draw/modes/edit_text_mode.c b/source/blender/draw/modes/edit_text_mode.c
index f21715ef399..ec8d4fbb25b 100644
--- a/source/blender/draw/modes/edit_text_mode.c
+++ b/source/blender/draw/modes/edit_text_mode.c
@@ -58,6 +58,7 @@ typedef struct EDIT_TEXT_PassList {
 	struct DRWPass *wire_pass;
 	struct DRWPass *overlay_select_pass;
 	struct DRWPass *overlay_cursor_pass;
+	struct DRWPass *text_box_pass;
 } EDIT_TEXT_PassList;
 
 typedef struct EDIT_TEXT_FramebufferList {
@@ -110,6 +111,8 @@ typedef struct EDIT_TEXT_PrivateData {
 	DRWShadingGroup *wire_shgrp;
 	DRWShadingGroup *overlay_select_shgrp;
 	DRWShadingGroup *overlay_cursor_shgrp;
+	DRWShadingGroup *box_shgrp;
+	DRWShadingGroup *box_active_shgrp;
 } EDIT_TEXT_PrivateData; /* Transient data */
 
 /* *********** FUNCTIONS *********** */
@@ -181,6 +184,67 @@ static void EDIT_TEXT_cache_init(void *vedata)
 		        "Font Cursor",
 		        DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH);
 		stl->g_data->overlay_cursor_shgrp = DRW_shgroup_create(e_data.overlay_cursor_sh, psl->overlay_cursor_pass);
+
+		psl->text_box_pass = DRW_pass_create(
+		        "Font Text Boxes",
+		        DRW_STATE_WRITE_COLOR | DRW_STATE_WRITE_DEPTH);
+		stl->g_data->box_shgrp = shgroup_dynlines_dashed_uniform_color(psl->text_box_pass, ts.colorWire);
+		stl->g_data->box_active_shgrp = shgroup_dynlines_dashed_uniform_color(psl->text_box_pass, ts.colorActive);
+	}
+}
+
+static void edit_text_cache_populate_boxes(void *vedata, Object *ob)
+{
+	EDIT_TEXT_StorageList *stl = ((EDIT_TEXT_Data *)vedata)->stl;
+	const Curve *cu = ob->data;
+
+	DRWShadingGroup *shading_groups[] = {
+	    stl->g_data->box_active_shgrp,
+	    stl->g_data->box_shgrp,
+	};
+
+	float vec[3], vec1[3], vec2[3];
+	for (int i = 0; i < cu->totbox; i++) {
+		TextBox *tb = &cu->tb[i];
+
+		if ((tb->w == 0.0f) && (tb->h == 0.0f)) {
+			continue;
+		}
+
+		const bool is_active = i == (cu->actbox - 1);
+		DRWShadingGroup *shading_group = shading_groups[is_active ? 0 : 1];
+
+		vec[0] = cu->xof + tb->x;
+		vec[1] = cu->yof + tb->y + cu->fsize;
+		vec[2] = 0.001;
+
+		mul_v3_m4v3(vec1, ob->obmat, vec);
+		vec[0] += tb->w;
+		mul_v3_m4v3(vec2, ob->obmat, vec);
+
+		DRW_shgroup_call_dynamic_add(shading_group, vec1);
+		DRW_shgroup_call_dynamic_add(shading_group, vec2);
+
+		vec[1] -= tb->h;
+		copy_v3_v3(vec1, vec2);
+		mul_v3_m4v3(vec2, ob->obmat, vec);
+
+		DRW_shgroup_call_dynamic_add(shading_group, vec1);
+		DRW_shgroup_call_dynamic_add(shading_group, vec2);
+
+		vec[0] -= tb->w;
+		copy_v3_v3(vec1, vec2);
+		mul_v3_m4v3(vec2, ob->obmat, vec);
+
+		DRW_shgroup_call_dynamic_add(shading_group, vec1);
+		DRW_shgroup_call_dynamic_add(shading_group, vec2);
+
+		vec[1] += tb->h;
+		copy_v3_v3(vec1, vec2);
+		mul_v3_m4v3(vec2, ob->obmat, vec);
+
+		DRW_shgroup_call_dynamic_add(shading_group, vec1);
+		DRW_shgroup_call_dynamic_add(shading_group, vec2);
 	}
 }
 
@@ -218,6 +282,8 @@ static void EDIT_TEXT_cache_populate(void *vedata, Object *ob)
 			if (geom) {
 				DRW_shgroup_call_add(stl->g_data->overlay_cursor_shgrp, geom, ob->obmat);
 			}
+
+			edit_text_cache_populate_boxes(vedata, ob);
 		}
 	}
 }
@@ -255,6 +321,10 @@ static void EDIT_TEXT_draw_scene(void *vedata)
 
 	DRW_draw_pass(psl->wire_pass);
 
+	if (!DRW_pass_is_empty(psl->text_box_pass)) {
+		DRW_draw_pass(psl->text_box_pass);
+	}
+
 	set_inverted_drawing(1);
 	DRW_draw_pass(psl->overlay_select_pass);
 	DRW_draw_pass(psl->overlay_cursor_pass);