mirror of
https://github.com/joncampbell123/dosbox-x.git
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82 lines
2.0 KiB
HLSL
82 lines
2.0 KiB
HLSL
/*
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Copyright (C) 2005 guest(r) - guest.r@gmail.com
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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This SimpleAA shader is well used to:
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- AA 2xscaled gfx. to its 4x absolute size,
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- AA hi-res "screens" (640x480) to their 2x size.
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*/
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#include "shader.code"
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float scaling : SCALING = 2.0;
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string name : NAME = "SimpleAA";
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string combineTechique : COMBINETECHNIQUE = "SimpleAA";
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// **VS**
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VERTEX_STUFF3 S_VERTEX (float3 p : POSITION, float2 tc : TEXCOORD0)
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{
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VERTEX_STUFF3 OUT = (VERTEX_STUFF3)0;
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float dx = ps.x*0.5;
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float dy = ps.y*0.5;
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OUT.coord = mul(float4(p,1),WorldViewProjection);
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OUT.C = tc;
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OUT.L = tc + float2(-dx, 0);
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OUT.R = tc + float2( dx, 0);
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OUT.U = tc + float2( 0,-dy);
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OUT.D = tc + float2( 0, dy);
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return OUT;
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}
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// **PS**
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float4 S_FRAGMENT ( in VERTEX_STUFF3 VAR ) : COLOR
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{
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half3 c11 = tex2D(s_p, VAR.C ).xyz;
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half3 c01 = tex2D(s_p, VAR.L ).xyz;
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half3 c21 = tex2D(s_p, VAR.R ).xyz;
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half3 c10 = tex2D(s_p, VAR.U ).xyz;
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half3 c12 = tex2D(s_p, VAR.D ).xyz;
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half k1 = dot(abs(c01-c21),dt)+0.0001;
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half k2 = dot(abs(c10-c12),dt)+0.0001;
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return half4((k1*(c10+c12)+k2*(c01+c21))/(2.0*(k1+k2)),0);
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}
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technique SimpleAA
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{
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pass P0
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{
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VertexShader = compile vs_2_0 S_VERTEX();
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PixelShader = compile ps_2_0 S_FRAGMENT();
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}
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}
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