From 564bf8a089f6dbd3ac767b5c78eb52fe3ca558d8 Mon Sep 17 00:00:00 2001
From: Gregory Hainaut <gregory.hainaut@gmail.com>
Date: Mon, 30 May 2016 19:39:52 +0200
Subject: [PATCH] gsdx ogl: terminator 3 supports sampling from the depth

---
 plugins/GSdx/res/glsl/tfx_fs.glsl | 6 ++++++
 plugins/GSdx/res/glsl_source.h    | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/plugins/GSdx/res/glsl/tfx_fs.glsl b/plugins/GSdx/res/glsl/tfx_fs.glsl
index 59a9c4a648..6a25b1498c 100644
--- a/plugins/GSdx/res/glsl/tfx_fs.glsl
+++ b/plugins/GSdx/res/glsl/tfx_fs.glsl
@@ -347,10 +347,16 @@ vec4 fetch_rgb()
 
 vec4 fetch_gXbY()
 {
+#if PS_DEPTH_FMT == 1 || PS_DEPTH_FMT == 2
+    int depth = fetch_raw_depth();
+    int bg = (depth >> (8 + ChannelShuffle.w)) & 0xFF;
+    return vec4(bg);
+#else
     ivec4 rt = ivec4(fetch_raw_color() * 255.0f);
     int green = (rt.g >> ChannelShuffle.w) & ChannelShuffle.z;
     int blue  = (rt.b << ChannelShuffle.y) & ChannelShuffle.x;
     return vec4(green | blue);
+#endif
 }
 
 //////////////////////////////////////////////////////////////////////
diff --git a/plugins/GSdx/res/glsl_source.h b/plugins/GSdx/res/glsl_source.h
index c9404a166f..e16224da7e 100644
--- a/plugins/GSdx/res/glsl_source.h
+++ b/plugins/GSdx/res/glsl_source.h
@@ -1192,10 +1192,16 @@ static const char* const tfx_fs_all_glsl =
 	"\n"
 	"vec4 fetch_gXbY()\n"
 	"{\n"
+	"#if PS_DEPTH_FMT == 1 || PS_DEPTH_FMT == 2\n"
+	"    int depth = fetch_raw_depth();\n"
+	"    int bg = (depth >> (8 + ChannelShuffle.w)) & 0xFF;\n"
+	"    return vec4(bg);\n"
+	"#else\n"
 	"    ivec4 rt = ivec4(fetch_raw_color() * 255.0f);\n"
 	"    int green = (rt.g >> ChannelShuffle.w) & ChannelShuffle.z;\n"
 	"    int blue  = (rt.b << ChannelShuffle.y) & ChannelShuffle.x;\n"
 	"    return vec4(green | blue);\n"
+	"#endif\n"
 	"}\n"
 	"\n"
 	"//////////////////////////////////////////////////////////////////////\n"