Metadata display: support word-wrapped note

- Match layout from stamp buffer (note last so it can wrap)
- Correct vertical spacing (didn't take decender into account)
- Use U.pixelsize when setting font-size.

source/blender/editors/screen/area.c

@@ -2083,9 +2083,9 @@ static const char *meta_data_list[] =
 {
 	"File",
 	"Strip",
-	"Note",
 	"Date",
 	"RenderTime",
+	"Note",
 	"Marker",
 	"Time",
 	"Frame",
@@ -2106,7 +2106,15 @@ static void metadata_draw_imbuf(ImBuf *ibuf, const rctf *rect, int fontid, const
 	short i;
 	int len;
 	const float height = BLF_height_max(fontid);
-	const float vertical_offset = height + (0.1f * U.widget_unit);
+	const float margin = height / 8;
+	const float vertical_offset = (height + margin);
+
+	/* values taking margins into account */
+	const float descender = BLF_descender(fontid);
+	const float xmin = (rect->xmin + margin);
+	const float xmax = (rect->xmax - margin);
+	const float ymin = (rect->ymin + margin) - descender;
+	const float ymax = (rect->ymax - margin) - descender;
 
 	if (is_top) {
 		for (i = 0; i < 4; i++) {
@@ -2115,8 +2123,7 @@ static void metadata_draw_imbuf(ImBuf *ibuf, const rctf *rect, int fontid, const
 				bool do_newline = false;
 				len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[0]);
 				if (metadata_is_valid(ibuf, temp_str, 0, len)) {
-					BLF_position(fontid, rect->xmin + (0.2f * U.widget_unit),
+					BLF_position(fontid, xmin, ymax - vertical_offset, 0.0f);
-					             rect->ymax - vertical_offset, 0.0f);
 					BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
 					do_newline = true;
 				}
@@ -2124,30 +2131,40 @@ static void metadata_draw_imbuf(ImBuf *ibuf, const rctf *rect, int fontid, const
 				len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[1]);
 				if (metadata_is_valid(ibuf, temp_str, 1, len)) {
 					line_width = BLF_width(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
-					BLF_position(fontid, rect->xmax - line_width - (0.2f * U.widget_unit),
+					BLF_position(fontid, xmax - line_width, ymax - vertical_offset, 0.0f);
-					             rect->ymax - vertical_offset, 0.0f);
 					BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
 					do_newline = true;
 				}
 
 				if (do_newline)
 					ofs_y += vertical_offset;
-			}
+			} /* Strip */
-			else if (i == 1) {
+			else if (i == 1 || i == 2) {
 				len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[i + 1]);
 				if (metadata_is_valid(ibuf, temp_str, i + 1, len)) {
-					BLF_position(fontid, rect->xmin + (0.2f * U.widget_unit),
+					BLF_position(fontid, xmin, ymax - vertical_offset - ofs_y, 0.0f);
-					             rect->ymax - vertical_offset - ofs_y, 0.0f);
 					BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
 					ofs_y += vertical_offset;
 				}
+			} /* Note (wrapped) */
+			else if (i == 3) {
+				len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[i + 1]);
+				if (metadata_is_valid(ibuf, temp_str, i + 1, len)) {
+					struct ResultBLF info;
+					BLF_enable(fontid, BLF_WORD_WRAP);
+					BLF_wordwrap(fontid, ibuf->x - (margin * 2));
+					BLF_position(fontid, xmin, ymax - vertical_offset - ofs_y, 0.0f);
+					BLF_draw_ex(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX, &info);
+					BLF_wordwrap(fontid, 0);
+					BLF_disable(fontid, BLF_WORD_WRAP);
+					ofs_y += vertical_offset * info.lines;
+				}
 			}
 			else {
 				len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[i + 1]);
 				if (metadata_is_valid(ibuf, temp_str, i + 1, len)) {
 					line_width = BLF_width(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
-					BLF_position(fontid, rect->xmax  - line_width -  (0.2f * U.widget_unit),
+					BLF_position(fontid, xmax  - line_width, ymax - vertical_offset - ofs_y, 0.0f);
-					             rect->ymax - vertical_offset - ofs_y, 0.0f);
 					BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
 					ofs_y += vertical_offset;
 				}
@@ -2159,8 +2176,7 @@ static void metadata_draw_imbuf(ImBuf *ibuf, const rctf *rect, int fontid, const
 		for (i = 5; i < 10; i++) {
 			len = BLI_snprintf_rlen(temp_str, MAX_METADATA_STR, "%s: ", meta_data_list[i]);
 			if (metadata_is_valid(ibuf, temp_str, i, len)) {
-				BLF_position(fontid, rect->xmin + (0.2f * U.widget_unit) + ofs_x,
+				BLF_position(fontid, xmin + ofs_x, ymin, 0.0f);
-				             rect->ymin + (0.3f * U.widget_unit), 0.0f);
 				BLF_draw(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX);
 	
 				ofs_x += BLF_width(fontid, temp_str, BLF_DRAW_STR_DUMMY_MAX) + UI_UNIT_X;
@@ -2171,9 +2187,10 @@ static void metadata_draw_imbuf(ImBuf *ibuf, const rctf *rect, int fontid, const
 
 static float metadata_box_height_get(ImBuf *ibuf, int fontid, const bool is_top)
 {
+	const float height = BLF_height_max(fontid);
+	const float margin = (height / 8);
 	char str[MAX_METADATA_STR] = "";
 	short i, count = 0;
-	const float height = BLF_height_max(fontid) + 0.1f * U.widget_unit;
 
 	if (is_top) {
 		if (metadata_is_valid(ibuf, str, 0, 0) || metadata_is_valid(ibuf, str, 1, 0)) {
@@ -2181,7 +2198,23 @@ static float metadata_box_height_get(ImBuf *ibuf, int fontid, const bool is_top)
 		}
 		for (i = 2; i < 5; i++) {
 			if (metadata_is_valid(ibuf, str, i, 0)) {
-				count++;
+				if (i == 4) {
+					struct {
+						struct ResultBLF info;
+						rctf rect;
+					} wrap;
+
+					BLF_enable(fontid, BLF_WORD_WRAP);
+					BLF_wordwrap(fontid, ibuf->x - (margin * 2));
+					BLF_boundbox_ex(fontid, str, sizeof(str), &wrap.rect, &wrap.info);
+					BLF_wordwrap(fontid, 0);
+					BLF_disable(fontid, BLF_WORD_WRAP);
+
+					count += wrap.info.lines;
+				}
+				else {
+					count++;
+				}
 			}
 		}
 	}
@@ -2194,7 +2227,7 @@ static float metadata_box_height_get(ImBuf *ibuf, int fontid, const bool is_top)
 	}
 
 	if (count) {
-		return (height * count + (0.1f * U.widget_unit));
+		return (height + margin) * count;
 	}
 
 	return 0;
@@ -2218,7 +2251,7 @@ void ED_region_image_metadata_draw(int x, int y, ImBuf *ibuf, const rctf *frame,
 	glTranslatef(x, y, 0.0f);
 	glScalef(zoomx, zoomy, 1.0f);
 
-	BLF_size(blf_mono_font, style->widgetlabel.points * 1.5f, U.dpi);
+	BLF_size(blf_mono_font, style->widgetlabel.points * 1.5f * U.pixelsize, U.dpi);
 
 	/* *** upper box*** */