source/materials/pbrmaterial.cpp

   1 #include "framebuffer.h"
   2 #include "mesh.h"
   3 #include "pbrmaterial.h"
   4 #include "renderer.h"
   5 #include "resources.h"
   6 #include "texture2d.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 const Tag PbrMaterial::texture_tags[] =
  14 {
  15         Tag("base_color_map"),
  16         Tag("normal_map"),
  17         Tag("metalness_map"),
  18         Tag("roughness_map"),
  19         Tag("occlusion_map"),
  20         Tag("emission_map"),
  21         Tag("fresnel_lookup"),
  22         Tag()
  23 };
  24
  25 PbrMaterial::PbrMaterial():
  26         fresnel_lookup(get_or_create_fresnel_lookup())
  27 {
  28         set_base_color(0.8f);
  29         set_metalness(0.0f);
  30         set_roughness(0.5f);
  31         set_emission(0.0f);
  32 }
  33
  34 const Texture2D &PbrMaterial::get_or_create_fresnel_lookup()
  35 {
  36         Resources &resources = Resources::get_global();
  37
  38         static const string name = "_pbr_fresnel_lookup.tex2d";
  39         Texture2D *fresnel_lookup = resources.find<Texture2D>(name);
  40         if(fresnel_lookup)
  41                 return *fresnel_lookup;
  42
  43         fresnel_lookup = new Texture2D;
  44         fresnel_lookup->storage(RG8, 128, 128, 1);
  45         resources.add(name, fresnel_lookup);
  46
  47         const Program &shprog = resources.get<Program>("_pbr_fresnel_lookup.glsl.shader");
  48         ProgramData shdata;
  49         shdata.uniform("n_samples", 1024);
  50         // Not actually used here, but put it in to satisfy the interface
  51         shdata.uniform("roughness", 0.0f);
  52
  53         const Mesh &mesh = resources.get<Mesh>("_fullscreen_quad.mesh");
  54         Framebuffer fresnel_lookup_fbo;
  55         fresnel_lookup_fbo.attach(COLOR_ATTACHMENT0, *fresnel_lookup);
  56         Bind bind_fbo(fresnel_lookup_fbo);
  57         Renderer renderer;
  58         renderer.set_shader_program(&shprog, &shdata);
  59         mesh.draw(renderer);
  60
  61         return *fresnel_lookup;
  62 }
  63
  64 void PbrMaterial::fill_program_info(string &module_name, map<string, int> &spec_values) const
  65 {
  66         module_name = "cooktorrance.glsl";
  67         spec_values["use_base_color_map"] = (base_color.texture!=0);
  68         spec_values["use_normal_map"] = (normal.texture!=0);
  69         spec_values["use_metalness_map"] = (metalness.texture!=0);
  70         spec_values["use_roughness_map"] = (roughness.texture!=0);
  71         spec_values["use_occlusion_map"] = (occlusion.texture!=0);
  72         bool use_emission = (emission.texture || emission.value.r || emission.value.g || emission.value.b);
  73         spec_values["use_emission"] = use_emission;
  74         spec_values["use_emission_map"] = (emission.texture!=0);
  75 }
  76
  77 const Texture *PbrMaterial::get_texture(Tag tag) const
  78 {
  79         if(tag==texture_tags[0])
  80                 return base_color.texture;
  81         else if(tag==texture_tags[1])
  82                 return normal.texture;
  83         else if(tag==texture_tags[2])
  84                 return metalness.texture;
  85         else if(tag==texture_tags[3])
  86                 return roughness.texture;
  87         else if(tag==texture_tags[4])
  88                 return occlusion.texture;
  89         else if(tag==texture_tags[5])
  90                 return emission.texture;
  91         else if(tag==texture_tags[6])
  92                 return &fresnel_lookup;
  93         else
  94                 return 0;
  95 }
  96
  97 void PbrMaterial::set_base_color(const Color &color)
  98 {
  99         base_color.value = color;
 100         shdata.uniform("pbr_material.base_color", color);
 101 }
 102
 103 void PbrMaterial::set_base_color_map(const Texture *tex)
 104 {
 105         base_color.texture = tex;
 106 }
 107
 108 void PbrMaterial::set_normal_map(const Texture *tex)
 109 {
 110         normal.texture = tex;
 111 }
 112
 113 void PbrMaterial::set_metalness(float value)
 114 {
 115         metalness.value = value;
 116         shdata.uniform("pbr_material.metalness", value);
 117 }
 118
 119 void PbrMaterial::set_metalness_map(const Texture *tex)
 120 {
 121         metalness.texture = tex;
 122 }
 123
 124 void PbrMaterial::set_roughness(float value)
 125 {
 126         roughness.value = value;
 127         shdata.uniform("pbr_material.roughness", value);
 128 }
 129
 130 void PbrMaterial::set_roughness_map(const Texture *tex)
 131 {
 132         roughness.texture = tex;
 133 }
 134
 135 void PbrMaterial::set_occlusion_map(const Texture *tex)
 136 {
 137         occlusion.texture = tex;
 138 }
 139
 140 void PbrMaterial::set_emission(const Color &color)
 141 {
 142         emission.value = color;
 143         shdata.uniform("pbr_material.emission", color);
 144 }
 145
 146 void PbrMaterial::set_emission_map(const Texture *tex)
 147 {
 148         emission.texture = tex;
 149 }
 150
 151
 152 DataFile::Loader::ActionMap PbrMaterial::Loader::shared_actions;
 153
 154 PbrMaterial::Loader::Loader(PbrMaterial &m):
 155         DerivedObjectLoader<PbrMaterial, Material::PropertyLoader<PbrMaterial> >(m)
 156 {
 157         set_actions(shared_actions);
 158 }
 159
 160 PbrMaterial::Loader::Loader(PbrMaterial &m, Collection &c):
 161         DerivedObjectLoader<PbrMaterial, Material::PropertyLoader<PbrMaterial> >(m, c)
 162 {
 163         set_actions(shared_actions);
 164 }
 165
 166 void PbrMaterial::Loader::init_actions()
 167 {
 168         Material::PropertyLoader<PbrMaterial>::init_actions();
 169         add_property("base_color", &PbrMaterial::set_base_color, &PbrMaterial::set_base_color_map, true);
 170         add_property("normal", &PbrMaterial::set_normal_map);
 171         add_property("metalness", &PbrMaterial::set_metalness, &PbrMaterial::set_metalness_map);
 172         add_property("roughness", &PbrMaterial::set_roughness, &PbrMaterial::set_roughness_map);
 173         add_property("occlusion", &PbrMaterial::set_occlusion_map);
 174         add_property("emission", &PbrMaterial::set_emission, &PbrMaterial::set_emission_map, false);
 175 }
 176
 177 } // namespace GL
 178 } // namespace Msp