shaders: Add G-Buffer support to GLSL ports.

Author: CrossVR

res/gamedata/shaders/gl/combine_2_aa.ps

@@ -214,7 +214,7 @@ f_deffer pack_gbuffer( float4 norm, float4 pos, float4 col, uint imask )
 	res.Ne			= norm;
 	res.C			   = col;
 #else
-	res.position	= float4( gbuf_pack_normal( norm ), pos.z, gbuf_pack_hemi_mtl( norm.w, pos.w ) );
+	res.position	= float4( gbuf_pack_normal( norm.xyz ), pos.z, gbuf_pack_hemi_mtl( norm.w, pos.w ) );
 	res.C			   = col;
 #endif
 
@@ -226,14 +226,14 @@ f_deffer pack_gbuffer( float4 norm, float4 pos, float4 col, uint imask )
 }
 
 #ifdef GBUFFER_OPTIMIZATION
-gbuffer_data gbuffer_load_data( float2 tc, float2 pos2d, int iSample )
+gbuffer_data gbuffer_load_data( float2 tc, float4 pos2d, uint iSample )
 {
 	gbuffer_data gbd;
 
 	gbd.P = float3(0,0,0);
 	gbd.hemi = 0;
 	gbd.mtl = 0;
-	gbd.C = 0;
+	gbd.C = float3(0,0,0);
 	gbd.N = float3(0,0,0);
 
 #ifndef USE_MSAA
@@ -250,7 +250,7 @@ gbuffer_data gbuffer_load_data( float2 tc, float2 pos2d, int iSample )
 	// righttop		= (  tan(fHorzFOV/2),  tan(fVertFOV/2), 1 )
 	// leftbottom   = ( -tan(fHorzFOV/2), -tan(fVertFOV/2), 1 )
 	// rightbottom	= (  tan(fHorzFOV/2), -tan(fVertFOV/2), 1 )
-	gbd.P  = float3( P.z * ( pos2d * pos_decompression_params.zw - pos_decompression_params.xy ), P.z );
+	gbd.P  = float3( P.z * ( pos2d.xy * pos_decompression_params.zw - pos_decompression_params.xy ), P.z );
 
 	// reconstruct N
 	gbd.N = gbuf_unpack_normal( P.xy );
@@ -273,21 +273,21 @@ gbuffer_data gbuffer_load_data( float2 tc, float2 pos2d, int iSample )
 	return gbd;
 }
 
-gbuffer_data gbuffer_load_data( float2 tc, float2 pos2d )
+gbuffer_data gbuffer_load_data( float2 tc, float4 pos2d )
 {
    return gbuffer_load_data( tc, pos2d, 0 );
 }
 
-gbuffer_data gbuffer_load_data_offset( float2 tc, float2 OffsetTC, float2 pos2d )
+gbuffer_data gbuffer_load_data_offset( float2 tc, float2 OffsetTC, float4 pos2d )
 {
-	float2  delta	  = ( ( OffsetTC - tc ) * pos_decompression_params2.xy );
+	float4  delta	  = float4( ( OffsetTC - tc ) * pos_decompression_params2.xy, 0, 0 );
 
 	return gbuffer_load_data( OffsetTC, pos2d + delta, 0 );
 }
 
-gbuffer_data gbuffer_load_data_offset( float2 tc, float2 OffsetTC, float2 pos2d, uint iSample )
+gbuffer_data gbuffer_load_data_offset( float2 tc, float2 OffsetTC, float4 pos2d, uint iSample )
 {
-   float2  delta	  = ( ( OffsetTC - tc ) * pos_decompression_params2.xy );
+   float4  delta	  = float4( ( OffsetTC - tc ) * pos_decompression_params2.xy, 0, 0 );
 
    return gbuffer_load_data( OffsetTC, pos2d + delta, iSample );
 }

res/gamedata/shaders/gl/common_functions.h

@@ -1,6 +1,6 @@
 #include	"common.h"
 #include	"iostructs\v_static_bump.h"
-#line 4 1
+
 v2p_bumped _main( v_in I )
 {
 //	I.color.rgb 	= I.color.bgr;	//	Swizzle to compensate DX9/DX10 format mismatch

res/gamedata/shaders/gl/deffer_base_bump.vs

@@ -1,6 +1,6 @@
 #include "common.h"
 #include "iostructs\v_static_flat.h"
-#line 4 1
+
 v2p_flat _main ( v_in I )
 {
 	I.Nh			= unpack_D3DCOLOR(I.Nh);

res/gamedata/shaders/gl/deffer_base_flat.vs

@@ -25,7 +25,7 @@ v2p_bumped _main( v_model I )
 	float3	Nw	= mul		(float3x3(m_W), float3(I.N));
 	float3  hc_pos	= float3(hemi_cube_pos_faces);
 	float3	hc_neg	= float3(hemi_cube_neg_faces);
-	float3  hc_mixed= mix(hc_pos, hc_neg, lessThan(Nw, float3(0)));
+	float3  hc_mixed= mask(lessThan(Nw, float3(0)), hc_neg, hc_pos);
 	float	hemi_val= dot( hc_mixed, abs(Nw) );
 	hemi_val	= saturate(hemi_val);
 

res/gamedata/shaders/gl/deffer_impl_flat.ps

@@ -22,7 +22,7 @@ v2p_flat _main( v_model I )
 	float3	Nw	= mul		(float3x3(m_W), float3(I.N));
 	float3  hc_pos	= float3(hemi_cube_pos_faces);
 	float3	hc_neg	= float3(hemi_cube_neg_faces);
-	float3  hc_mixed= mix(hc_pos, hc_neg, lessThan(Nw, float3(0)));
+	float3  hc_mixed= mask(lessThan(Nw, float3(0)), hc_neg, hc_pos);
 	float	hemi_val= dot( hc_mixed, abs(Nw) );
 	hemi_val	= saturate(hemi_val);
 

res/gamedata/shaders/gl/deffer_model_bump.vs

@@ -30,7 +30,6 @@ void main()
 	I.Tex0		= p_TL_Tex0;
 	I.Color 	= p_TL_Color;
 
-	SV_Target	= _main (I);
 #ifdef MSAA_OPTIMIZATION
 #ifdef GBUFFER_OPTIMIZATION
 	SV_Target	= _main ( I, gl_FragCoord, gl_SampleID );