diff --git a/core/rend/gles/gldraw.cpp b/core/rend/gles/gldraw.cpp
index 01483b2c1..dd99fd2b3 100644
--- a/core/rend/gles/gldraw.cpp
+++ b/core/rend/gles/gldraw.cpp
@@ -68,9 +68,6 @@ const static u32 SrcBlendGL[] =
 	GL_ONE_MINUS_DST_ALPHA
 };
 
-extern int screen_width;
-extern int screen_height;
-
 PipelineShader* CurrentShader;
 u32 gcflip;
 
@@ -102,24 +99,8 @@ s32 SetTileClip(u32 val, bool set)
 	if (csx <= 0 && csy <= 0 && cex >= 640 && cey >= 480)
 		return 0;
 	
-	if (set && clip_mode) {
-		csx *= scale_x;
-		csy *= scale_y;
-		cex *= scale_x;
-		cey *= scale_y;
-		if (!pvrrc.isRTT) {
-			float t = cey;
-			cey = 480 - csy;
-			csy = 480 - t;
-			float dc2s_scale_h = screen_height / 480.0f;
-			float ds2s_offs_x = (screen_width - dc2s_scale_h * 640) / 2;
-			csx = csx * dc2s_scale_h + ds2s_offs_x;
-			cex = cex * dc2s_scale_h + ds2s_offs_x;
-			csy = csy * dc2s_scale_h;
-			cey = cey * dc2s_scale_h;
-		}
+	if (set)
 		glUniform4f(CurrentShader->pp_ClipTest, csx, csy, cex, cey);
-	}
 
 	return clip_mode;
 }
diff --git a/core/rend/gles/gles.cpp b/core/rend/gles/gles.cpp
index c7817896e..bd28f3454 100755
--- a/core/rend/gles/gles.cpp
+++ b/core/rend/gles/gles.cpp
@@ -271,14 +271,14 @@ void main() \n\
 { \n\
 	// Clip outside the box \n\
 	#if pp_ClipTestMode==1 \n\
-		if (gl_FragCoord.x < pp_ClipTest.x || gl_FragCoord.x > pp_ClipTest.z \n\
-				|| gl_FragCoord.y < pp_ClipTest.y || gl_FragCoord.y > pp_ClipTest.w) \n\
+		if (vtx_xyz.x < pp_ClipTest.x || vtx_xyz.x > pp_ClipTest.z \n\
+				|| vtx_xyz.y < pp_ClipTest.y || vtx_xyz.y > pp_ClipTest.w) \n\
 			discard; \n\
 	#endif \n\
 	// Clip inside the box \n\
 	#if pp_ClipTestMode==-1 \n\
-		if (gl_FragCoord.x >= pp_ClipTest.x && gl_FragCoord.x <= pp_ClipTest.z \n\
-				&& gl_FragCoord.y >= pp_ClipTest.y && gl_FragCoord.y <= pp_ClipTest.w) \n\
+		if (vtx_xyz.x >= pp_ClipTest.x && vtx_xyz.x <= pp_ClipTest.z \n\
+				&& vtx_xyz.y >= pp_ClipTest.y && vtx_xyz.y <= pp_ClipTest.w) \n\
 			discard; \n\
 	#endif \n\
 	\n\