HDR: Fix logarithmic depth in WS 3.0

Effects/ws30.eff

@@ -1929,7 +1929,7 @@
 
       <cull-face>back</cull-face>
       <program>
-        <vertex-shader>Shaders/HDR/terrain_default.vert</vertex-shader>
+        <vertex-shader>Shaders/HDR/ws30.vert</vertex-shader>
         <vertex-shader>Shaders/HDR/logarithmic_depth.glsl</vertex-shader>
         <fragment-shader>Shaders/HDR/ws30.frag</fragment-shader>
         <fragment-shader>Shaders/HDR/logarithmic_depth.glsl</fragment-shader>

Shaders/HDR/ws30.frag

@@ -1,6 +1,7 @@
 #version 330 core
 
 in VS_OUT {
+	float flogz;
     vec2 texcoord;
     vec2 orthophoto_texcoord;
     vec3 vertex_normal;
@@ -31,6 +32,8 @@ void gbuffer_pack(vec3 normal, vec3 base_color, float metallic, float roughness,
                   float occlusion, vec3 emissive, uint mat_id);
 // color.glsl
 vec3 eotf_inverse_sRGB(vec3 srgb);
+// logarithmic_depth.glsl
+float logdepth_encode(float z);
 
 void main()
 {
@@ -71,4 +74,5 @@ void main()
 	vec3 N = normalize(fs_in.vertex_normal);
 
     gbuffer_pack(N, color, TERRAIN_METALLIC, TERRAIN_ROUGHNESS, 1.0, vec3(0.0), 3u);
+	gl_FragDepth = logdepth_encode(fs_in.flogz);
 }

Shaders/HDR/ws30.vert

@@ -0,0 +1,28 @@
+#version 330 core
+
+layout(location = 0) in vec4 pos;
+layout(location = 1) in vec3 normal;
+layout(location = 3) in vec4 multitexcoord0;
+layout(location = 5) in vec4 multitexcoord2;
+
+out VS_OUT {
+    float flogz;
+    vec2 texcoord;
+    vec2 orthophoto_texcoord;
+    vec3 vertex_normal;
+} vs_out;
+
+uniform mat4 osg_ModelViewProjectionMatrix;
+uniform mat3 osg_NormalMatrix;
+
+// logarithmic_depth.glsl
+float logdepth_prepare_vs_depth(float z);
+
+void main()
+{
+    gl_Position = osg_ModelViewProjectionMatrix * pos;
+    vs_out.flogz = logdepth_prepare_vs_depth(gl_Position.w);
+    vs_out.texcoord = multitexcoord0.st;
+    vs_out.orthophoto_texcoord = multitexcoord2.st;
+    vs_out.vertex_normal = osg_NormalMatrix * normal;
+}