fix opengl im2d. d3d still no fog

src/d3d/shaders/lighting.h

@@ -11,7 +11,7 @@ float3 DoDirLight(Light L, float3 N)
 	return l*L.color.xyz;
 }
 
-float3 DoDirLightSpec(Light L, float3 N, float3 V, float power))
+float3 DoDirLightSpec(Light L, float3 N, float3 V, float power)
 {
 	return pow(saturate(dot(N, normalize(V + -L.direction.xyz))), power)*L.color.xyz;
 }

src/gl/rwgl3.h

@@ -130,8 +130,9 @@ struct Im2DVertex
 	void setScreenX(float32 x) { this->x = x; }
 	void setScreenY(float32 y) { this->y = y; }
 	void setScreenZ(float32 z) { this->z = z; }
-	void setCameraZ(float32 z) { this->w = z; }
-	void setRecipCameraZ(float32 recipz) { }
+	// This is a bit unefficient but we have to counteract GL's divide, so multiply
+	void setCameraZ(float32 z) { }
+	void setRecipCameraZ(float32 recipz) { this->w = 1.0f/recipz; }
 	void setColor(uint8 r, uint8 g, uint8 b, uint8 a) {
 		this->r = r; this->g = g; this->b = b; this->a = a; }
 	void setU(float32 u, float recipz) { this->u = u; }

src/gl/shaders/im2d.vert

@@ -10,9 +10,8 @@ void
 main(void)
 {
 	gl_Position = in_pos;
-	gl_Position.w = 1.0;
 	gl_Position.xy = gl_Position.xy * u_xform.xy + u_xform.zw;
-	v_fog = DoFog(gl_Position.z);
+	v_fog = DoFog(gl_Position.w);
 	gl_Position.xyz *= gl_Position.w;
 	v_color = in_color;
 	v_tex0 = in_tex0;

src/gl/shaders/im2d_gl.inc

@@ -11,9 +11,8 @@ const char *im2d_vert_src =
 "main(void)\n"
 "{\n"
 "	gl_Position = in_pos;\n"
-"	gl_Position.w = 1.0;\n"
 "	gl_Position.xy = gl_Position.xy * u_xform.xy + u_xform.zw;\n"
-"	v_fog = DoFog(gl_Position.z);\n"
+"	v_fog = DoFog(gl_Position.w);\n"
 "	gl_Position.xyz *= gl_Position.w;\n"
 "	v_color = in_color;\n"
 "	v_tex0 = in_tex0;\n"