From 93ccf8e9e4b76e64fd5a09e31f0455cdf9bd2ff1 Mon Sep 17 00:00:00 2001
From: bruvzg <7645683+bruvzg@users.noreply.github.com>
Date: Mon, 22 Jul 2024 07:48:09 +0300
Subject: [PATCH] [RTL] Fix text size rounding with MSDF fonts.

---
 doc/classes/TextParagraph.xml |  2 +-
 scene/gui/rich_text_label.cpp | 14 +++++++-------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/doc/classes/TextParagraph.xml b/doc/classes/TextParagraph.xml
index 541078ed223..c6511a2b8e9 100644
--- a/doc/classes/TextParagraph.xml
+++ b/doc/classes/TextParagraph.xml
@@ -175,7 +175,7 @@
 			<return type="Vector2" />
 			<param index="0" name="line" type="int" />
 			<description>
-				Returns size of the bounding box of the line of text.
+				Returns size of the bounding box of the line of text. Returned size is rounded up.
 			</description>
 		</method>
 		<method name="get_line_underline_position" qualifiers="const">
diff --git a/scene/gui/rich_text_label.cpp b/scene/gui/rich_text_label.cpp
index 5ef02bf19d7..1da3668ebed 100644
--- a/scene/gui/rich_text_label.cpp
+++ b/scene/gui/rich_text_label.cpp
@@ -828,14 +828,14 @@ int RichTextLabel::_draw_line(ItemFrame *p_frame, int p_line, const Vector2 &p_o
 			break;
 		}
 
-		const Size2 line_size = l.text_buf->get_line_size(line);
-		if (p_ofs.y + off.y + line_size.y <= 0) {
-			off.y += line_size.y;
+		double l_height = l.text_buf->get_line_ascent(line) + l.text_buf->get_line_descent(line);
+		if (p_ofs.y + off.y + l_height <= 0) {
+			off.y += l_height;
 			continue;
 		}
 
 		float width = l.text_buf->get_width();
-		float length = line_size.x;
+		float length = l.text_buf->get_line_size(line).x;
 
 		// Draw line.
 		line_count++;
@@ -5139,7 +5139,7 @@ void RichTextLabel::scroll_to_selection() {
 			if (range.x <= selection.from_char && range.y >= selection.from_char) {
 				break;
 			}
-			line_offset += selection.from_frame->lines[selection.from_line].text_buf->get_line_size(i).y + theme_cache.line_separation;
+			line_offset += selection.from_frame->lines[selection.from_line].text_buf->get_line_ascent(i) + selection.from_frame->lines[selection.from_line].text_buf->get_line_descent(i) + theme_cache.line_separation;
 		}
 
 		// Add nested frame (e.g. table cell) offset.
@@ -5191,7 +5191,7 @@ void RichTextLabel::scroll_to_line(int p_line) {
 		if ((line_count <= p_line) && (line_count + main->lines[i].text_buf->get_line_count() >= p_line)) {
 			float line_offset = 0.f;
 			for (int j = 0; j < p_line - line_count; j++) {
-				line_offset += main->lines[i].text_buf->get_line_size(j).y + theme_cache.line_separation;
+				line_offset += main->lines[i].text_buf->get_line_ascent(j) + main->lines[i].text_buf->get_line_descent(j) + theme_cache.line_separation;
 			}
 			vscroll->set_value(main->lines[i].offset.y + line_offset);
 			return;
@@ -5211,7 +5211,7 @@ float RichTextLabel::get_line_offset(int p_line) {
 		if ((line_count <= p_line) && (p_line <= line_count + main->lines[i].text_buf->get_line_count())) {
 			float line_offset = 0.f;
 			for (int j = 0; j < p_line - line_count; j++) {
-				line_offset += main->lines[i].text_buf->get_line_size(j).y + theme_cache.line_separation;
+				line_offset += main->lines[i].text_buf->get_line_ascent(j) + main->lines[i].text_buf->get_line_descent(j) + theme_cache.line_separation;
 			}
 			return main->lines[i].offset.y + line_offset;
 		}