gsdx ogl: implement wildhack on the CPU

Speed impact is likely small and the plan is only to keep a single Vertex Shader

plugins/GSdx/GSDeviceOGL.cpp

@@ -769,7 +769,6 @@ void GSDeviceOGL::Barrier(GLbitfield b)
 GLuint GSDeviceOGL::CompileVS(VSSelector sel)
 {
 	std::string macro = format("#define VS_BPPZ %d\n", sel.bppz)
-		+ format("#define VS_WILDHACK %d\n", sel.wildhack)
 		;
 
 	return m_shader->Compile("tfx_vgs.glsl", "vs_main", GL_VERTEX_SHADER, tfx_vgs_glsl, macro);

plugins/GSdx/GSDeviceOGL.h

@@ -151,10 +151,9 @@ public:
 		{
 			struct
 			{
-				uint32 wildhack:1;
 				uint32 bppz:2;
 
-				uint32 _free:29;
+				uint32 _free:30;
 			};
 
 			uint32 key;
@@ -447,7 +446,7 @@ public:
 		GLuint ps;
 	} m_shadeboost;
 
-	GLuint m_vs[1<<3];
+	GLuint m_vs[1<<2];
 	GLuint m_gs[1<<2];
 	GLuint m_ps_ss[1<<4];
 	GSDepthStencilOGL* m_om_dss[1<<5];

plugins/GSdx/GSRendererOGL.cpp

@@ -130,6 +130,12 @@ void GSRendererOGL::SetupIA()
 
 	GSDeviceOGL* dev = (GSDeviceOGL*)m_dev;
 
+
+	if (UserHacks_WildHack && !isPackedUV_HackFlag && PRIM->TME && PRIM->FST) {
+		for(unsigned int i = 0; i < m_vertex.next; i++)
+			m_vertex.buff[i].UV &= 0x3FEF3FEF;
+	}
+
 	if (!GLLoader::found_geometry_shader)
 		EmulateGS();
 
@@ -973,8 +979,6 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
 
 	// vs
 
-	vs_sel.wildhack = (UserHacks_WildHack && !isPackedUV_HackFlag) ? 1 : 0;
-
 	// The real GS appears to do no masking based on the Z buffer format and writing larger Z values
 	// than the buffer supports seems to be an error condition on the real GS, causing it to crash.
 	// We are probably receiving bad coordinates from VU1 in these cases.

plugins/GSdx/res/glsl/tfx_vgs.glsl

@@ -21,7 +21,7 @@ const float exp_min32 = exp2(-32.0f);
 
 void texture_coord()
 {
-    vec2 uv = (VS_WILDHACK == 1) ? vec2(i_uv &  uvec2(0x3FEF, 0x3FEF)) : vec2(i_uv);
+    vec2 uv = vec2(i_uv);
 
     // Float coordinate
     VSout.t_float.xy = i_st;

plugins/GSdx/res/glsl_source.h

@@ -683,7 +683,7 @@ static const char* const tfx_vgs_glsl =
 	"\n"
 	"void texture_coord()\n"
 	"{\n"
-	"    vec2 uv = (VS_WILDHACK == 1) ? vec2(i_uv &  uvec2(0x3FEF, 0x3FEF)) : vec2(i_uv);\n"
+	"    vec2 uv = vec2(i_uv);\n"
 	"\n"
 	"    // Float coordinate\n"
 	"    VSout.t_float.xy = i_st;\n"