294 lines
8.9 KiB
HLSL
294 lines
8.9 KiB
HLSL
//!!ver 100 150
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//!!permu DELUXE
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!!permu FULLBRIGHT
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!!permu FOG
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//!!permu LIGHTSTYLED
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//!!permu BUMP
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//!!permu SPECULAR
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//!!permu REFLECTCUBEMASK
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//!!cvarf r_glsl_offsetmapping_scale
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//!!cvardf r_tessellation_level=5
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//!!samps diffuse lightmap specular normalmap fullbright reflectmask reflectcube paletted lightmap1 lightmap2 lightmap3
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!!samps diffuse fullbright lightmap
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#undef SPECULAR
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//#include "sys/defs.h"
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#define vec4 float4
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#define vec3 float3
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#define vec2 float2
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#define texture2D tex2D
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#define mat3 float3x3
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#define mat4 float4x4
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struct a2v
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{
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vec4 v_position : POSITION;
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vec2 v_texcoord : TEXCOORD0;
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#if defined(OFFSETMAPPING) || defined(SPECULAR) || defined(REFLECTCUBEMASK)
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vec3 v_normal : NORMAL;
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vec3 v_svector : TANGENT;
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vec3 v_tvector : BINORMAL;
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#endif
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#ifdef VERTEXLIT
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vec4 v_colour : COLOR0;
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#else
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vec2 v_lmcoord : TEXCOORD1;
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#endif
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};
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struct v2f
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{
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#ifndef FRAGMENT_SHADER
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vec4 pos: POSITION;
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#endif
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#if defined(OFFSETMAPPING) || defined(SPECULAR) || defined(REFLECTCUBEMASK) || defined(FOG)
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vec3 eyevector : TEXCOORD4;
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#endif
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#if defined(REFLECTCUBEMASK) || defined(BUMPMODELSPACE)
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mat3 invsurface : TEXCOORD5;
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#endif
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#ifdef VERTEXLIT
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vec2 tclm : TEXCOORD0;
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#else
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vec4 tclm : TEXCOORD0;
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#endif
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vec4 vc : COLOR0;
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#ifndef VERTEXLIT
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#ifdef LIGHTSTYLED
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//we could use an offset, but that would still need to be per-surface which would break batches
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//fixme: merge attributes?
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vec2 lm1 : TEXCOORD1, lm2 : TEXCOORD2, lm3 : TEXCOORD3;
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#endif
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#endif
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};
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//this is what normally draws all of your walls, even with rtlights disabled
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//note that the '286' preset uses drawflat_walls instead.
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#include "sys/fog.h"
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#ifdef VERTEX_SHADER
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float4x4 m_modelviewprojection;
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float4x4 m_modelview;
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vec3 e_eyepos;
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vec4 e_lmscale;
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v2f main (a2v inp)
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{
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v2f outp;
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#if defined(OFFSETMAPPING) || defined(SPECULAR) || defined(REFLECTCUBEMASK)
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vec3 eyeminusvertex = e_eyepos - inp.v_position.xyz;
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outp.eyevector.x = dot(eyeminusvertex, inp.v_svector.xyz);
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outp.eyevector.y = dot(eyeminusvertex, inp.v_tvector.xyz);
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outp.eyevector.z = dot(eyeminusvertex, inp.v_normal.xyz);
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#elif defined(FOG)
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outp.eyevector = mul(m_modelview, inp.v_position);
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#endif
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#if defined(REFLECTCUBEMASK) || defined(BUMPMODELSPACE)
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outp.invsurface[0] = inp.v_svector;
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outp.invsurface[1] = inp.v_tvector;
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outp.invsurface[2] = inp.v_normal;
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#endif
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outp.tclm.xy = inp.v_texcoord;
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#ifdef FLOW
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// outp.tclm.x += e_time * -0.5;
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#endif
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#ifdef VERTEXLIT
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#ifdef LIGHTSTYLED
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//FIXME, only one colour.
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outp.vc = inp.v_colour * e_lmscale[0];
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#else
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outp.vc = inp.v_colour * e_lmscale;
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#endif
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#else
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outp.vc = e_lmscale;
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outp.tclm.zw = inp.v_lmcoord;
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#ifdef LIGHTSTYLED
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outp.lm1 = inp.v_lmcoord2;
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outp.lm2 = inp.v_lmcoord3;
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outp.lm3 = inp.v_lmcoord4;
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#endif
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#endif
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outp.pos = mul(m_modelviewprojection, inp.v_position);
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return outp;
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}
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#endif
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#ifdef FRAGMENT_SHADER
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sampler s_diffuse : register(s0);
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//sampler s_normalmap;
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//sampler s_specular;
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//sampler s_upper;
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//sampler s_lower;
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sampler s_fullbright : register(s1);
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//sampler s_paletted;
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//sampler s_reflectcube;
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//sampler s_reflectmask;
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sampler s_lightmap : register(s2);
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//sampler s_deluxmap;
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//samplers
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#define s_colourmap s_t0
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//sampler2D s_colourmap;
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//vec4 e_lmscale;
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vec4 e_colourident;
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#ifdef OFFSETMAPPING
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#include "sys/offsetmapping.h"
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#endif
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vec4 main (v2f inp) : COLOR0
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{
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vec4 gl_FragColor;
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#define tc (inp.tclm.xy)
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#define lm0 (inp.tclm.zw)
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//adjust texture coords for offsetmapping
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#ifdef OFFSETMAPPING
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vec2 tcoffsetmap = offsetmap(s_normalmap, tc, eyevector);
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#define tc tcoffsetmap
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#endif
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#if defined(EIGHTBIT) && !defined(LIGHTSTYLED)
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//optional: round the lightmap coords to ensure all pixels within a texel have different lighting values either. it just looks wrong otherwise.
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//don't bother if its lightstyled, such cases will have unpredictable correlations anyway.
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//FIXME: this rounding is likely not correct with respect to software rendering. oh well.
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#if __VERSION__ >= 130
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vec2 lmsize = vec2(textureSize(s_lightmap0, 0));
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#else
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#define lmsize vec2(128.0,2048.0)
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#endif
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#define texelstolightmap (16.0)
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vec2 lmcoord0 = floor(lm0 * lmsize*texelstolightmap)/(lmsize*texelstolightmap);
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#define lm0 lmcoord0
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#endif
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//yay, regular texture!
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gl_FragColor = texture2D(s_diffuse, tc);
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#if defined(BUMP) && (defined(DELUXE) || defined(SPECULAR) || defined(REFLECTCUBEMASK))
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vec3 norm = normalize(texture2D(s_normalmap, tc).rgb - 0.5);
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#elif defined(SPECULAR) || defined(DELUXE) || defined(REFLECTCUBEMASK)
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vec3 norm = vec3(0, 0, 1); //specular lighting expects this to exist.
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#endif
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//modulate that by the lightmap(s) including deluxemap(s)
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#ifdef VERTEXLIT
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#ifdef LIGHTSTYLED
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vec3 lightmaps = inp.vc.rgb;
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#else
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vec3 lightmaps = inp.vc.rgb;
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#endif
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#define delux vec3(0.0,0.0,1.0)
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#else
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#ifdef LIGHTSTYLED
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#error foobar
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#define delux vec3(0.0,0.0,1.0)
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vec3 lightmaps;
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#ifdef DELUXE
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lightmaps = texture2D(s_lightmap0, lm0).rgb * e_lmscale[0].rgb * dot(norm, 2.0*texture2D(s_deluxmap0, lm0).rgb-0.5);
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lightmaps += texture2D(s_lightmap1, lm1).rgb * e_lmscale[1].rgb * dot(norm, 2.0*texture2D(s_deluxmap1, lm1).rgb-0.5);
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lightmaps += texture2D(s_lightmap2, lm2).rgb * e_lmscale[2].rgb * dot(norm, 2.0*texture2D(s_deluxmap2, lm2).rgb-0.5);
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lightmaps += texture2D(s_lightmap3, lm3).rgb * e_lmscale[3].rgb * dot(norm, 2.0*texture2D(s_deluxmap3, lm3).rgb-0.5);
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#else
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lightmaps = texture2D(s_lightmap0, lm0).rgb * e_lmscale[0].rgb;
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lightmaps += texture2D(s_lightmap1, lm1).rgb * e_lmscale[1].rgb;
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lightmaps += texture2D(s_lightmap2, lm2).rgb * e_lmscale[2].rgb;
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lightmaps += texture2D(s_lightmap3, lm3).rgb * e_lmscale[3].rgb;
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#endif
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#else
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vec3 lightmaps = texture2D(s_lightmap, lm0).rgb;
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//modulate by the bumpmap dot light
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#ifdef DELUXE
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#error foobar
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vec3 delux = (texture2D(s_deluxmap, lm0).rgb-0.5);
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#ifdef BUMPMODELSPACE
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delux = normalize(delux*invsurface);
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#else
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lightmaps *= 2.0 / max(0.25, delux.z); //counter the darkening from deluxmaps
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#endif
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lightmaps *= dot(norm, delux);
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#else
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#define delux vec3(0.0,0.0,1.0)
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#endif
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#endif
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lightmaps *= inp.vc.rgb;
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#endif
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//add in specular, if applicable.
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#ifdef SPECULAR
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vec4 specs = texture2D(s_specular, tc);
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vec3 halfdir = normalize(normalize(eyevector) + delux); //this norm should be the deluxemap info instead
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float spec = pow(max(dot(halfdir, norm), 0.0), FTE_SPECULAR_EXPONENT * specs.a);
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spec *= FTE_SPECULAR_MULTIPLIER;
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//NOTE: rtlights tend to have a *4 scaler here to over-emphasise the effect because it looks cool.
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//As not all maps will have deluxemapping, and the double-cos from the light util makes everything far too dark anyway,
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//we default to something that is not garish when the light value is directly infront of every single pixel.
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//we can justify this difference due to the rtlight editor etc showing the *4.
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gl_FragColor.rgb += spec * specs.rgb;
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#endif
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#ifdef REFLECTCUBEMASK
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vec3 rtc = reflect(normalize(-eyevector), norm);
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rtc = rtc.x*invsurface[0] + rtc.y*invsurface[1] + rtc.z*invsurface[2];
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rtc = (m_model * vec4(rtc.xyz,0.0)).xyz;
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gl_FragColor.rgb += texture2D(s_reflectmask, tc).rgb * textureCube(s_reflectcube, rtc).rgb;
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#endif
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#ifdef EIGHTBIT //FIXME: with this extra flag, half the permutations are redundant.
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lightmaps *= 0.5; //counter the fact that the colourmap contains overbright values and logically ranges from 0 to 2 intead of to 1.
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float pal = texture2D(s_paletted, tc).r; //the palette index. hopefully not interpolated.
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lightmaps -= 1.0 / 128.0; //software rendering appears to round down, so make sure we favour the lower values instead of rounding to the nearest
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gl_FragColor.r = texture2D(s_colourmap, vec2(pal, 1.0-lightmaps.r)).r; //do 3 lookups. this is to cope with lit files, would be a waste to not support those.
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gl_FragColor.g = texture2D(s_colourmap, vec2(pal, 1.0-lightmaps.g)).g; //its not very softwarey, but re-palettizing is ugly.
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gl_FragColor.b = texture2D(s_colourmap, vec2(pal, 1.0-lightmaps.b)).b; //without lits, it should be identical.
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#else
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//now we have our diffuse+specular terms, modulate by lightmap values.
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gl_FragColor.rgb *= lightmaps.rgb;
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//add on the fullbright
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#ifdef FULLBRIGHT
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vec4 fb = texture2D(s_fullbright, tc);
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gl_FragColor.rgb += fb.rgb*fb.a;
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#endif
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#endif
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//entity modifiers
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gl_FragColor = gl_FragColor * e_colourident;
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#if defined(MASK)
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#if defined(MASKLT)
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if (gl_FragColor.a < MASK)
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discard;
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#else
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if (gl_FragColor.a >= MASK)
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discard;
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#endif
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gl_FragColor.a = 1.0; //alpha blending AND alpha testing usually looks stupid, plus it screws up our fog.
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#endif
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//and finally hide it all if we're fogged.
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#ifdef FOG
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gl_FragColor = fog4(gl_FragColor, length(inp.eyevector));
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#endif
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return gl_FragColor;
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}
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#endif
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