From daecfffefbc729f80c3380c838901b6618530fb0 Mon Sep 17 00:00:00 2001
From: ocornut <omarcornut@gmail.com>
Date: Mon, 15 Apr 2024 12:52:45 +0200
Subject: [PATCH] Text, DrawList: Improved handling of long single-line wrapped
 text. (#7496, #5720)

---
 docs/CHANGELOG.txt | 2 ++
 imgui_draw.cpp     | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 408ed0f3f..189c9f5cc 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -43,6 +43,8 @@ Breaking changes:
 
 Other changes:
 
+- Text, DrawList: Improved handling of long single-line wrapped text. Faster and
+  mitigitate issues with reading vertex indexing limits with 16-bit indices.
 - Backends: SDL3: Fixed text inputs. Re-enable calling SDL_StartTextInput()/SDL_StopTextInput()
   as SDL3 no longer enables it by default. (#7452, #6306, #6071, #1953) [@Green-Sky]
 
diff --git a/imgui_draw.cpp b/imgui_draw.cpp
index 93be40cc7..f3da38519 100644
--- a/imgui_draw.cpp
+++ b/imgui_draw.cpp
@@ -4080,6 +4080,8 @@ void ImFont::RenderText(ImDrawList* draw_list, float size, const ImVec2& pos, Im
             {
                 x = start_x;
                 y += line_height;
+                if (y > clip_rect.w)
+                    break; // break out of main loop
                 word_wrap_eol = NULL;
                 s = CalcWordWrapNextLineStartA(s, text_end); // Wrapping skips upcoming blanks
                 continue;