From 293e687389a19b369f312c5c335c9afe7c886be1 Mon Sep 17 00:00:00 2001
From: Party Wumpus <48649272+PartyWumpus@users.noreply.github.com>
Date: Tue, 16 Jul 2024 21:03:10 +0100
Subject: renderer: Make shader time always count from zero (#6903)

* testing out an initialtime variable

* Make time universally start at zero instead of exposing an initial time

* Appease the CI
---
 src/render/OpenGL.cpp | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

(limited to 'src/render/OpenGL.cpp')

diff --git a/src/render/OpenGL.cpp b/src/render/OpenGL.cpp
index 8229e210..e127ec2d 100644
--- a/src/render/OpenGL.cpp
+++ b/src/render/OpenGL.cpp
@@ -858,9 +858,11 @@ void CHyprOpenGLImpl::applyScreenShader(const std::string& path) {
         return;
     }
 
-    m_sFinalScreenShader.proj      = glGetUniformLocation(m_sFinalScreenShader.program, "proj");
-    m_sFinalScreenShader.tex       = glGetUniformLocation(m_sFinalScreenShader.program, "tex");
-    m_sFinalScreenShader.time      = glGetUniformLocation(m_sFinalScreenShader.program, "time");
+    m_sFinalScreenShader.proj = glGetUniformLocation(m_sFinalScreenShader.program, "proj");
+    m_sFinalScreenShader.tex  = glGetUniformLocation(m_sFinalScreenShader.program, "tex");
+    m_sFinalScreenShader.time = glGetUniformLocation(m_sFinalScreenShader.program, "time");
+    if (m_sFinalScreenShader.time != -1)
+        m_sFinalScreenShader.initialTime = m_tGlobalTimer.getSeconds();
     m_sFinalScreenShader.wl_output = glGetUniformLocation(m_sFinalScreenShader.program, "wl_output");
     m_sFinalScreenShader.fullSize  = glGetUniformLocation(m_sFinalScreenShader.program, "screen_size");
     if (m_sFinalScreenShader.fullSize == -1)
@@ -1155,7 +1157,7 @@ void CHyprOpenGLImpl::renderTextureInternalWithDamage(SP<CTexture> tex, CBox* pB
     glUniform1i(shader->tex, 0);
 
     if ((usingFinalShader && *PDT == 0) || CRASHING) {
-        glUniform1f(shader->time, m_tGlobalTimer.getSeconds());
+        glUniform1f(shader->time, m_tGlobalTimer.getSeconds() - shader->initialTime);
     } else if (usingFinalShader && shader->time != -1) {
         // Don't let time be unitialised
         glUniform1f(shader->time, 0.f);
-- 
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