From d88ffce3030b122d941eeddd3394954e1d0d14d0 Mon Sep 17 00:00:00 2001
From: Mylloon <kennel.anri@tutanota.com>
Date: Sat, 27 May 2023 04:14:29 +0200
Subject: [PATCH] use FBO for transitions !

---
 src/animations.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/animations.c b/src/animations.c
index 2c52dea..b27776f 100644
--- a/src/animations.c
+++ b/src/animations.c
@@ -3,7 +3,8 @@
 /* Mise-à-jour des animations en fonction du son */
 static void update_with_audio(void (*)(int), void (*)(int), int);
 
-static GLuint _transition_pId[2] = {0}, _transition_tId = 0, _quadId = 0;
+static GLuint _transition_pId[2] = {0}, _transition_tId = 0, _quadId = 0,
+              _transition_fbo[2] = {0};
 static void transition_init(const char *, const int, GLuint *);
 static void transition_draw(void (*)(int), void (*)(int), Uint32, Uint32, int,
                             int, GLuint *);
@@ -23,6 +24,7 @@ void transitionsInit(void) {
   if (!_quadId) {
     _quadId = gl4dgGenQuadf();
   }
+  glGenFramebuffers(2, _transition_fbo);
 }
 
 void zoomIn(void (*a0)(int), void (*a1)(int), Uint32 t, Uint32 et,
@@ -75,18 +77,21 @@ static void transition_draw(void (*a0)(int), void (*a1)(int), Uint32 t,
                                         GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
                                         (GLint *)&_transition_tId);
 
+  glBindFramebuffer(GL_FRAMEBUFFER, _transition_fbo[0]);
   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                          tex[0], 0);
   if (a0) {
     a0(state);
   }
 
+  glBindFramebuffer(GL_FRAMEBUFFER, _transition_fbo[1]);
   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                          tex[1], 0);
   if (a1) {
     a1(state);
   }
 
+  glBindFramebuffer(GL_FRAMEBUFFER, 0);
   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                          _transition_tId, 0);
 
@@ -115,7 +120,11 @@ static void transition_draw(void (*a0)(int), void (*a1)(int), Uint32 t,
 static void transition_deinit(GLuint *tex) {
   if (tex[0]) {
     glDeleteTextures(2, tex);
-    tex[0] = tex[1] = 0;
+    tex[0] = 0;
+  }
+  if (_transition_fbo[0]) {
+    glDeleteFramebuffers(2, _transition_fbo);
+    _transition_fbo[0] = 0;
   }
 }