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fteqw/engine/shaders/glsl/defaultskin.glsl
Spoike 0cf6128ffe Remove void* pointer arithmatic to make msvc happy. 
Change openal usage to try to be more conformant to spec (should only be an issue for less mature openal implementations though).
Added a developer warning if fog is oversaturated.
Fix crash when loading a game with an animated texture in view... yes, weird.
Support big-endian ktx files.
Added some wrath builtins.



git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@5588 fc73d0e0-1445-4013-8a0c-d673dee63da5
2019-12-10 14:50:47 +00:00

416 lines
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GLSL
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!!ver 100 150
!!permu TESS
!!permu FULLBRIGHT
!!permu UPPERLOWER
!!permu FRAMEBLEND
!!permu SKELETAL
!!permu FOG
!!permu BUMP
!!permu REFLECTCUBEMASK
!!cvarf r_glsl_offsetmapping_scale
!!cvarf gl_specular
!!cvardf gl_affinemodels=0
!!cvardf r_tessellation_level=5
!!samps !EIGHTBIT diffuse normalmap specular fullbright upper lower reflectmask reflectcube
!!samps =EIGHTBIT paletted 1
!!samps =OCCLUDE occlusion
//!!permu VC // adds rgba vertex colour multipliers
//!!permu SPECULAR // auto-added when gl_specular>0
//!!permu OFFSETMAPPING // auto-added when r_glsl_offsetmapping is set
//!!permu NONORMALS // states that there's no normals available, which affects lighting.
//!!permu ORM // specularmap is r:Occlusion, g:Roughness, b:Metalness
//!!permu SG // specularmap is rgb:F0, a:Roughness (instead of exponent)
//!!permu PBR // an attempt at pbr logic (enabled from ORM or SG)
//!!permu NOOCCLUDE // ignores the use of ORM's occlusion... yeah, stupid.
//!!permu OCCLUDE // use an explicit occlusion texturemap (separate from roughness+metalness).
//!!permu EIGHTBIT // uses software-style paletted colourmap lookups
//!!permu ALPHATEST // if defined, this is the required alpha level (more versatile than doing it at the q3shader level)
#include "sys/defs.h"
//standard shader used for models.
//must support skeletal and 2-way vertex blending or Bad Things Will Happen.
//the vertex shader is responsible for calculating lighting values.
#if gl_affinemodels==1 && __VERSION__ >= 130 && !defined(GL_ES)
#define affine noperspective
#else
#define affine
#endif
#if defined(ORM) || defined(SG)
#define PBR
#endif
#ifdef NONORMALS //lots of things need normals to work properly. make sure nothing breaks simply because they added an extra texture.
#undef BUMP
#undef SPECULAR
#undef OFFSETMAPPING
#undef REFLECTCUBEMASK
#endif
#ifdef VERTEX_SHADER
#include "sys/skeletal.h"
affine varying vec2 tc;
varying vec4 light;
#if defined(SPECULAR) || defined(OFFSETMAPPING) || defined(REFLECTCUBEMASK)
varying vec3 eyevector;
#endif
#if defined(PBR)||defined(REFLECTCUBEMASK)
varying mat3 invsurface;
#endif
#ifdef TESS
varying vec3 vertex;
varying vec3 normal;
#endif
void main ()
{
light.rgba = vec4(e_light_ambient, 1.0);
#ifdef NONORMALS
vec3 n, w;
gl_Position = skeletaltransform_w(w);
n = vec3(0.0);
#else
vec3 n, s, t, w;
gl_Position = skeletaltransform_wnst(w,n,s,t);
n = normalize(n);
s = normalize(s);
t = normalize(t);
#ifndef PBR
float d = dot(n,e_light_dir);
if (d < 0.0) //vertex shader. this might get ugly, but I don't really want to make it per vertex.
d = 0.0; //this avoids the dark side going below the ambient level.
light.rgb += (d*e_light_mul);
#else
light.rgb = vec3(1.0);
#endif
#endif
#if defined(PBR)
eyevector = e_eyepos - w.xyz;
#elif defined(SPECULAR)||defined(OFFSETMAPPING) || defined(REFLECTCUBEMASK)
vec3 eyeminusvertex = e_eyepos - w.xyz;
eyevector.x = dot(eyeminusvertex, s.xyz);
eyevector.y = dot(eyeminusvertex, t.xyz);
eyevector.z = dot(eyeminusvertex, n.xyz);
#endif
#if defined(PBR) || defined(REFLECTCUBEMASK)
invsurface = mat3(s, t, n);
#endif
tc = v_texcoord;
#ifdef VC
light *= v_colour;
#endif
//FIXME: Software rendering imitation should possibly push out normals by half a pixel or something to approximate software's over-estimation of distant model sizes (small models are drawn using JUST their verticies using the nearest pixel, which results in larger meshes)
#ifdef TESS
normal = n;
vertex = w;
#endif
}
#endif
#if defined(TESS_CONTROL_SHADER)
layout(vertices = 3) out;
in vec3 vertex[];
out vec3 t_vertex[];
in vec3 normal[];
out vec3 t_normal[];
affine in vec2 tc[];
affine out vec2 t_tc[];
in vec4 light[];
out vec4 t_light[];
#if defined(SPECULAR) || defined(OFFSETMAPPING) || defined(REFLECTCUBEMASK)
in vec3 eyevector[];
out vec3 t_eyevector[];
#endif
#ifdef REFLECTCUBEMASK
in mat3 invsurface[];
out mat3 t_invsurface[];
#endif
void main()
{
//the control shader needs to pass stuff through
#define id gl_InvocationID
t_vertex[id] = vertex[id];
t_normal[id] = normal[id];
t_tc[id] = tc[id];
t_light[id] = light[id];
#if defined(SPECULAR) || defined(OFFSETMAPPING) || defined(REFLECTCUBEMASK)
t_eyevector[id] = eyevector[id];
#endif
#ifdef REFLECTCUBEMASK
t_invsurface[id][0] = invsurface[id][0];
t_invsurface[id][1] = invsurface[id][1];
t_invsurface[id][2] = invsurface[id][2];
#endif
gl_TessLevelOuter[0] = float(r_tessellation_level);
gl_TessLevelOuter[1] = float(r_tessellation_level);
gl_TessLevelOuter[2] = float(r_tessellation_level);
gl_TessLevelInner[0] = float(r_tessellation_level);
}
#endif
#if defined(TESS_EVALUATION_SHADER)
layout(triangles) in;
in vec3 t_vertex[];
in vec3 t_normal[];
affine in vec2 t_tc[];
affine out vec2 tc;
in vec4 t_light[];
out vec4 light;
#if defined(SPECULAR) || defined(OFFSETMAPPING) || defined(REFLECTCUBEMASK)
in vec3 t_eyevector[];
out vec3 eyevector;
#endif
#ifdef REFLECTCUBEMASK
in mat3 t_invsurface[];
out mat3 invsurface;
#endif
#define LERP(a) (gl_TessCoord.x*a[0] + gl_TessCoord.y*a[1] + gl_TessCoord.z*a[2])
void main()
{
#define factor 1.0
tc = LERP(t_tc);
vec3 w = LERP(t_vertex);
vec3 t0 = w - dot(w-t_vertex[0],t_normal[0])*t_normal[0];
vec3 t1 = w - dot(w-t_vertex[1],t_normal[1])*t_normal[1];
vec3 t2 = w - dot(w-t_vertex[2],t_normal[2])*t_normal[2];
w = w*(1.0-factor) + factor*(gl_TessCoord.x*t0+gl_TessCoord.y*t1+gl_TessCoord.z*t2);
//FIXME: we should be recalcing these here, instead of just lerping them
light = LERP(t_light);
#if defined(SPECULAR) || defined(OFFSETMAPPING) || defined(REFLECTCUBEMASK)
eyevector = LERP(t_eyevector);
#endif
#ifdef REFLECTCUBEMASK
invsurface[0] = LERP(t_invsurface[0]);
invsurface[1] = LERP(t_invsurface[1]);
invsurface[2] = LERP(t_invsurface[2]);
#endif
gl_Position = m_modelviewprojection * vec4(w,1.0);
}
#endif
#ifdef FRAGMENT_SHADER
#include "sys/fog.h"
#if defined(SPECULAR)
uniform float cvar_gl_specular;
#endif
#ifdef OFFSETMAPPING
#include "sys/offsetmapping.h"
#endif
#ifdef EIGHTBIT
#define s_colourmap s_t0
#endif
affine varying vec2 tc;
varying vec4 light;
#if defined(SPECULAR) || defined(OFFSETMAPPING) || defined(REFLECTCUBEMASK)
varying vec3 eyevector;
#endif
#if defined(PBR) || defined(REFLECTCUBEMASK)
varying mat3 invsurface;
#endif
#ifdef PBR
#include "sys/pbr.h"
#if 0
vec3 getIBLContribution(PBRInfo pbrInputs, vec3 n, vec3 reflection)
{
float mipCount = 9.0; // resolution of 512x512
float lod = (pbrInputs.perceptualRoughness * mipCount);
// retrieve a scale and bias to F0. See [1], Figure 3
vec3 brdf = texture2D(u_brdfLUT, vec2(pbrInputs.NdotV, 1.0 - pbrInputs.perceptualRoughness)).rgb;
vec3 diffuseLight = textureCube(u_DiffuseEnvSampler, n).rgb;
#ifdef USE_TEX_LOD
vec3 specularLight = textureCubeLodEXT(u_SpecularEnvSampler, reflection, lod).rgb;
#else
vec3 specularLight = textureCube(u_SpecularEnvSampler, reflection).rgb;
#endif
vec3 diffuse = diffuseLight * pbrInputs.diffuseColor;
vec3 specular = specularLight * (pbrInputs.specularColor * brdf.x + brdf.y);
// For presentation, this allows us to disable IBL terms
diffuse *= u_ScaleIBLAmbient.x;
specular *= u_ScaleIBLAmbient.y;
return diffuse + specular;
}
#endif
#endif
void main ()
{
vec4 col, sp;
#ifdef OFFSETMAPPING
vec2 tcoffsetmap = offsetmap(s_normalmap, tc, eyevector);
#define tc tcoffsetmap
#endif
#ifdef EIGHTBIT
vec3 lightlev = light.rgb;
//FIXME: with this extra flag, half the permutations are redundant.
lightlev *= 0.5; //counter the fact that the colourmap contains overbright values and logically ranges from 0 to 2 intead of to 1.
float pal = texture2D(s_paletted, tc).r; //the palette index. hopefully not interpolated.
// lightlev -= 1.0 / 128.0; //software rendering appears to round down, so make sure we favour the lower values instead of rounding to the nearest
col.r = texture2D(s_colourmap, vec2(pal, 1.0-lightlev.r)).r; //do 3 lookups. this is to cope with lit files, would be a waste to not support those.
col.g = texture2D(s_colourmap, vec2(pal, 1.0-lightlev.g)).g; //its not very softwarey, but re-palettizing is ugly.
col.b = texture2D(s_colourmap, vec2(pal, 1.0-lightlev.b)).b; //without lits, it should be identical.
col.a = (pal<1.0)?light.a:0.0;
#else
col = texture2D(s_diffuse, tc);
#ifdef UPPER
vec4 uc = texture2D(s_upper, tc);
col.rgb += uc.rgb*e_uppercolour*uc.a;
#endif
#ifdef LOWER
vec4 lc = texture2D(s_lower, tc);
col.rgb += lc.rgb*e_lowercolour*lc.a;
#endif
col *= factor_base;
#define dielectricSpecular 0.04
#ifdef SPECULAR
vec4 specs = texture2D(s_specular, tc)*factor_spec;
#ifdef ORM
#define occlusion specs.r
#define roughness clamp(specs.g, 0.04, 1.0)
#define metalness specs.b
#define gloss 1.0 //sqrt(1.0-roughness)
#define ambientrgb (specrgb+col.rgb)
vec3 specrgb = mix(vec3(dielectricSpecular), col.rgb, metalness);
col.rgb = col.rgb * (1.0 - dielectricSpecular) * (1.0-metalness);
#elif defined(SG) //pbr-style specular+glossiness, without occlusion
//occlusion needs to be baked in. :(
#define roughness (1.0-specs.a)
#define gloss (specs.a)
#define specrgb specs.rgb
#define ambientrgb (specrgb+col.rgb)
#else //blinn-phong
#define roughness (1.0-specs.a)
#define gloss specs.a
#define specrgb specs.rgb
#define ambientrgb col.rgb
#endif
#else
#define roughness 0.3
#define specrgb 1.0 //vec3(dielectricSpecular)
#endif
#ifdef BUMP
#ifdef PBR //to modelspace
vec3 bumps = normalize(invsurface * (texture2D(s_normalmap, tc).rgb*2.0 - 1.0));
#else //stay in tangentspace
vec3 bumps = normalize(vec3(texture2D(s_normalmap, tc)) - 0.5);
#endif
#else
#ifdef PBR //to modelspace
#define bumps normalize(invsurface[2])
#else //tangent space
#define bumps vec3(0.0, 0.0, 1.0)
#endif
#endif
#ifdef PBR
//move everything to model space
col.rgb = DoPBR(bumps, normalize(eyevector), -e_light_dir, roughness, col.rgb, specrgb, vec3(0.0,1.0,1.0))*e_light_mul + e_light_ambient*.25*ambientrgb;
#elif defined(gloss)
vec3 halfdir = normalize(normalize(eyevector) - e_light_dir);
float specmag = pow(max(dot(halfdir, bumps), 0.0), FTE_SPECULAR_EXPONENT * gloss);
col.rgb += FTE_SPECULAR_MULTIPLIER * specmag * specrgb;
#endif
#ifdef REFLECTCUBEMASK
vec3 rtc = reflect(-eyevector, bumps);
#ifndef PBR
rtc = rtc.x*invsurface[0] + rtc.y*invsurface[1] + rtc.z*invsurface[2];
#endif
rtc = (m_model * vec4(rtc.xyz,0.0)).xyz;
col.rgb += texture2D(s_reflectmask, tc).rgb * textureCube(s_reflectcube, rtc).rgb;
#endif
#ifdef OCCLUDE
col.rgb *= texture2D(s_occlusion, tc).r;
#elif defined(occlusion) && !defined(NOOCCLUDE)
col.rgb *= occlusion;
#endif
col *= light * e_colourident;
#ifdef FULLBRIGHT
vec4 fb = texture2D(s_fullbright, tc);
// col.rgb = mix(col.rgb, fb.rgb, fb.a);
col.rgb += fb.rgb * fb.a * e_glowmod.rgb * factor_emit.rgb;
#elif defined(PBR)
col.rgb += e_glowmod.rgb * factor_emit.rgb;
#endif
#endif
#ifdef ALPHATEST
if (!(col.a ALPHATEST))
discard;
#elif defined(MASK)
#if defined(MASKLT)
if (col.a < MASK)
discard;
#else
if (col.a >= MASK)
discard;
#endif
col.a = 1.0; //alpha blending AND alpha testing usually looks stupid, plus it screws up our fog.
#endif
gl_FragColor = fog4(col);
}
#endif
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