From 5b513cac5b467640f76e9b806e1a7834eb55ed5f Mon Sep 17 00:00:00 2001
From: Flyinghead <raphael.jean@gmail.com>
Date: Tue, 21 Jan 2025 18:18:05 +0100
Subject: [PATCH] gl: use textureProj for palette texture sampling when
 possible/available

Fixes UV precision issue when doing the Z-divide manually.
Issue #1804
---
 core/rend/gles/gles.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/core/rend/gles/gles.cpp b/core/rend/gles/gles.cpp
index d2d7b7ffd..59e3fc8ea 100644
--- a/core/rend/gles/gles.cpp
+++ b/core/rend/gles/gles.cpp
@@ -202,10 +202,12 @@ lowp vec4 getPaletteEntry(highp float colorIndex)
 
 lowp vec4 palettePixel(highp vec3 coords)
 {
-#if TARGET_GL != GLES2 && TARGET_GL != GL2 && DIV_POS_Z != 1
-	coords.xy /= coords.z;
-#endif
+#if TARGET_GL == GLES2 || TARGET_GL == GL2 || DIV_POS_Z == 1
 	return getPaletteEntry(texture(tex, coords.xy).FOG_CHANNEL);
+#else
+	return getPaletteEntry(textureProj(tex, coords).FOG_CHANNEL);
+#endif
+
 }
 
 #elif pp_Palette == 2		// Bi-linear filtering