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wined3d: Implement EXP and EXP2 fog in GLSL.

This commit is contained in:
Stefan Dösinger 2009-01-02 01:59:13 +01:00 committed by Alexandre Julliard
parent 693d9ded47
commit 66778ed9ec
1 changed files with 8 additions and 2 deletions
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10
dlls/wined3d/glsl_shader.c
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@ -3872,10 +3872,16 @@ static GLuint shader_glsl_generate_pshader(IWineD3DPixelShader *iface, SHADER_BU
shader_addline(buffer, "%s.xyz = mix(gl_Fog.color.xyz, %s.xyz, Fog);\n", fragcolor, fragcolor);
break;
case FOG_EXP:
FIXME("Implement EXP fog in glsl\n");
/* Fog = e^(-gl_Fog.density * gl_FogFragCoord) */
shader_addline(buffer, "float Fog = exp(-gl_Fog.density * gl_FogFragCoord);\n");
shader_addline(buffer, "Fog = clamp(Fog, 0.0, 1.0);");
shader_addline(buffer, "%s.xyz = mix(gl_Fog.color.xyz, %s.xyz, Fog);\n", fragcolor, fragcolor);
break;
case FOG_EXP2:
FIXME("Implement EXP2 fog in glsl\n");
/* Fog = e^(-(gl_Fog.density * gl_FogFragCoord)^2) */
shader_addline(buffer, "float Fog = exp(-gl_Fog.density * gl_Fog.density * gl_FogFragCoord * gl_FogFragCoord);\n");
shader_addline(buffer, "Fog = clamp(Fog, 0.0, 1.0);");
shader_addline(buffer, "%s.xyz = mix(gl_Fog.color.xyz, %s.xyz, Fog);\n", fragcolor, fragcolor);
break;
}
}