From d163e0f7ae907f6edd451e8c9b0d4a2d69241c8a Mon Sep 17 00:00:00 2001
From: veclavtalica <veclavtalica@poto.cafe>
Date: Tue, 1 Oct 2024 15:18:00 +0300
Subject: [PATCH] twn_gl_15_rendering.c: better caching of pipelines

---
 src/rendering/twn_gl_15_rendering.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/rendering/twn_gl_15_rendering.c b/src/rendering/twn_gl_15_rendering.c
index 241f753..a6a4bdd 100644
--- a/src/rendering/twn_gl_15_rendering.c
+++ b/src/rendering/twn_gl_15_rendering.c
@@ -59,6 +59,9 @@ static Pipeline pipeline_last_used = PIPELINE_NO;
 
 
 void use_space_pipeline(void) {
+    if (pipeline_last_used == PIPELINE_SPACE)
+        return;
+
     static GLuint list = 0;
     if (!list) {
         list = glGenLists(1);
@@ -104,6 +107,9 @@ void use_2d_pipeline(void) {
         glFlush();
     }
 
+    if (pipeline_last_used == PIPELINE_2D)
+        return;
+
     static GLuint list = 0;
     if (!list) {
         list = glGenLists(1);
@@ -205,6 +211,7 @@ void use_texture_mode(TextureMode mode) {
     if (!lists) {
         lists = glGenLists(3);
 
+        /* ghostly */
         glNewList(lists + 0, GL_COMPILE); {
             glEnable(GL_BLEND);
             glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
@@ -213,6 +220,7 @@ void use_texture_mode(TextureMode mode) {
             glDisable(GL_ALPHA_TEST);
         } glEndList();
 
+        /* seethrough */
         glNewList(lists + 1, GL_COMPILE); {
             glDisable(GL_BLEND);
             glDepthFunc(GL_LEQUAL);
@@ -221,6 +229,7 @@ void use_texture_mode(TextureMode mode) {
             glAlphaFunc(GL_EQUAL, 1.0f);
         } glEndList();
 
+        /* opaque */
         glNewList(lists + 2, GL_COMPILE); {
             glDisable(GL_BLEND);
             glDepthFunc(GL_LESS);