From 0ede28b03dacc739ab46b6e29f002d37a7637544 Mon Sep 17 00:00:00 2001
From: RaveYard <29225776+MrRaveYard@users.noreply.github.com>
Date: Wed, 2 Apr 2025 12:57:31 +0200
Subject: [PATCH] Workaround for a strange GLSL bug It seems like GLSL compiler
 is incorrectly inlining 'texelFetch(int index, ...)' and thus implicitly
 casting sampler2D to int

---
 wadsrc/static/shaders/scene/frag_main.glsl     | 2 +-
 wadsrc/static/shaders/scene/layout_shared.glsl | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/wadsrc/static/shaders/scene/frag_main.glsl b/wadsrc/static/shaders/scene/frag_main.glsl
index fde890486..9a0f94600 100644
--- a/wadsrc/static/shaders/scene/frag_main.glsl
+++ b/wadsrc/static/shaders/scene/frag_main.glsl
@@ -43,7 +43,7 @@ void main()
 	{
 		if (USE_DEPTHFADETHRESHOLD)
 		{
-			float behindFragmentDepth = texelFetch(LinearDepth, uViewOffset + ivec2(gl_FragCoord.xy), 0).r;
+			float behindFragmentDepth = texelFetchSampler2D(LinearDepth, uViewOffset + ivec2(gl_FragCoord.xy), 0).r;
 			material.Base.a *= clamp((behindFragmentDepth - pixelpos.w) / uDepthFadeThreshold, 0.0, 1.0);
 		}
 
diff --git a/wadsrc/static/shaders/scene/layout_shared.glsl b/wadsrc/static/shaders/scene/layout_shared.glsl
index 6f2cd4fb5..b7f7a4e24 100644
--- a/wadsrc/static/shaders/scene/layout_shared.glsl
+++ b/wadsrc/static/shaders/scene/layout_shared.glsl
@@ -121,3 +121,8 @@ vec4 texelFetch(int index, ivec2 P, int lod)
 {
 	return texelFetch(textures[nonuniformEXT(uTextureIndex + index)], P, lod);
 }
+
+vec4 texelFetchSampler2D(sampler2D s, ivec2 P, int lod)
+{
+	return texelFetch(s, P, lod);
+}