From c70fbec9f091fd16cb1219005edbc244d003cb33 Mon Sep 17 00:00:00 2001
From: Runik <34705093+rtoumazet@users.noreply.github.com>
Date: Wed, 13 Nov 2024 16:57:32 +0100
Subject: [PATCH] Update opengl_render.cpp

---
 saturnin/src/video/opengl/opengl_render.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/saturnin/src/video/opengl/opengl_render.cpp b/saturnin/src/video/opengl/opengl_render.cpp
index b33ea7b..781343f 100644
--- a/saturnin/src/video/opengl/opengl_render.cpp
+++ b/saturnin/src/video/opengl/opengl_render.cpp
@@ -260,6 +260,9 @@ void OpenglRender::render() {
 }
 
 void OpenglRender::renderByScreenPriority() {
+    // Parts to be displayed are moved to global_parts_list_, with one entry by priority + linked FBO (FboKey).
+    // 
+    // Goal is to reuse FBOs which are identical from previous frame to improve performances.
     MapOfPartsList global_parts_list;
 
     const auto getPartsFromThread = [&]() {
@@ -296,8 +299,8 @@ void OpenglRender::renderByScreenPriority() {
 
 void OpenglRender::renderByParts() {
     // All the parts to be displayed are read, regardless of their screen of attachment.
-    // Parts are sorted by priority.
-    
+    // Parts are sorted by priority, nothing's cached.
+
     PartsList parts_list;
 
     preRender();