source/materials/renderpass.cpp

   1 #include <msp/core/algorithm.h>
   2 #include <msp/datafile/collection.h>
   3 #include <msp/io/print.h>
   4 #include <msp/strings/format.h>
   5 #include "error.h"
   6 #include "renderpass.h"
   7 #include "program.h"
   8 #include "programdata.h"
   9 #include "renderer.h"
  10 #include "texture.h"
  11 #include "texture2d.h"
  12 #include "texturing.h"
  13 #include "uniform.h"
  14
  15 using namespace std;
  16
  17 namespace Msp {
  18 namespace GL {
  19
  20 RenderPass::RenderPass():
  21         shprog(0),
  22         shprog_from_material(false),
  23         shdata(0),
  24         material(0),
  25         back_faces(false),
  26         receive_shadows(false),
  27         image_based_lighting(false)
  28 { }
  29
  30 void RenderPass::set_material_textures()
  31 {
  32         const Tag *material_texture_tags = material->get_texture_tags();
  33         for(const Tag *tag=material_texture_tags; tag->id; ++tag)
  34                 set_texture(*tag, material->get_texture(*tag), material->get_sampler());
  35 }
  36
  37 void RenderPass::maybe_create_material_shader()
  38 {
  39         if(shprog && !shprog_from_material)
  40                 return;
  41
  42         map<string, int> extra_spec;
  43         if(receive_shadows)
  44                 extra_spec["use_shadow_map"] = true;
  45         if(image_based_lighting)
  46                 extra_spec["use_image_based_lighting"] = true;
  47
  48         shprog = material->create_compatible_shader(extra_spec);
  49
  50         if(shdata)
  51                 shdata = new ProgramData(*shdata, shprog);
  52
  53         shprog_from_material = true;
  54 }
  55
  56 void RenderPass::set_shader_program(const Program *prog, const ProgramData *data)
  57 {
  58         shprog = prog;
  59         shprog_from_material = false;
  60         shdata = (data ? new ProgramData(*data) : 0);
  61 }
  62
  63 Tag RenderPass::get_slotted_uniform_tag(Tag slot) const
  64 {
  65         map<Tag, Tag>::const_iterator i = uniform_slots.find(slot);
  66         if(i==uniform_slots.end())
  67                 return Tag();
  68         return i->second;
  69 }
  70
  71 void RenderPass::set_material(const Material *mat)
  72 {
  73         material = mat;
  74         maybe_create_material_shader();
  75         set_material_textures();
  76 }
  77
  78 void RenderPass::set_texture(Tag tag, const Texture *tex, const Sampler *samp)
  79 {
  80         vector<TextureSlot>::iterator i = find_member(textures, tag, &TextureSlot::tag);
  81         if(i==textures.end())
  82         {
  83                 textures.push_back(TextureSlot(tag));
  84                 i = textures.end()-1;
  85         }
  86         i->texture = tex;
  87         if(samp)
  88                 i->sampler = samp;
  89 }
  90
  91 Tag RenderPass::get_texture_tag(const string &slot) const
  92 {
  93         vector<TextureSlot>::const_iterator i = find_member(textures, slot, &TextureSlot::slot_name);
  94         return (i!=textures.end() ? i->tag : Tag());
  95 }
  96
  97 void RenderPass::set_texture(unsigned index, const Texture *tex, const Sampler *samp)
  98 {
  99         if(!shprog)
 100                 throw invalid_operation("RenderPass::set_texture");
 101
 102         const vector<Program::UniformInfo> &uniforms = shprog->get_uniforms();
 103         for(vector<Program::UniformInfo>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 104                 if(is_image(i->type) && i->binding==static_cast<int>(index))
 105                         return set_texture(i->tag, tex, samp);
 106
 107         if(shdata)
 108         {
 109                 const vector<Tag> &tags = shdata->get_uniform_tags();
 110                 for(vector<Tag>::const_iterator i=tags.begin(); i!=tags.end(); ++i)
 111                 {
 112                         vector<Program::UniformInfo>::const_iterator j = find_member(uniforms, *i, &Program::UniformInfo::tag);
 113                         if(j==uniforms.end() || !is_image(j->type))
 114                                 continue;
 115                         if(const Uniform1i *uni1i = dynamic_cast<const Uniform1i *>(shdata->find_uniform(*i)))
 116                                 if(uni1i->get()==static_cast<int>(index))
 117                                         return set_texture(*i, tex, samp);
 118                 }
 119         }
 120 }
 121
 122 int RenderPass::get_texture_index(const string &n) const
 123 {
 124         vector<TextureSlot>::const_iterator i = find_member(textures, n, &TextureSlot::slot_name);
 125         return (shprog && i!=textures.end() ? shprog->get_uniform_binding(i->tag) : -1);
 126 }
 127
 128 void RenderPass::set_back_faces(bool bf)
 129 {
 130         back_faces = bf;
 131 }
 132
 133 void RenderPass::set_receive_shadows(bool rs)
 134 {
 135         receive_shadows = rs;
 136 }
 137
 138 void RenderPass::apply(Renderer &renderer) const
 139 {
 140         for(vector<TextureSlot>::const_iterator i=textures.begin(); i!=textures.end(); ++i)
 141                 renderer.set_texture(i->tag, i->texture, i->sampler);
 142         renderer.set_shader_program(shprog, shdata.get());
 143         if(material)
 144                 renderer.add_shader_data(material->get_shader_data());
 145         renderer.set_reverse_winding(back_faces);
 146 }
 147
 148 void RenderPass::set_debug_name(const string &name)
 149 {
 150 #ifdef DEBUG
 151         if(shdata.refcount()==1)
 152                 shdata->set_debug_name(name+" [UBO]");
 153 #else
 154         (void)name;
 155 #endif
 156 }
 157
 158
 159 DataFile::Loader::ActionMap RenderPass::Loader::shared_actions;
 160
 161 RenderPass::Loader::Loader(RenderPass &p):
 162         DataFile::CollectionObjectLoader<RenderPass>(p, 0)
 163 {
 164         set_actions(shared_actions);
 165 }
 166
 167 RenderPass::Loader::Loader(RenderPass &p, Collection &c):
 168         DataFile::CollectionObjectLoader<RenderPass>(p, &c)
 169 {
 170         set_actions(shared_actions);
 171 }
 172
 173 void RenderPass::Loader::init_actions()
 174 {
 175         add("shader",   &Loader::shader);
 176         add("image_based_lighting", &RenderPass::image_based_lighting);
 177         add("material", &Loader::material_inline);
 178         add("material", &Loader::material);
 179         add("material_slot", &RenderPass::material_slot);
 180         add("back_faces",&RenderPass::back_faces);
 181         add("receive_shadows", &RenderPass::receive_shadows);
 182         add("texture", &Loader::texture);
 183         add("uniforms", &Loader::uniforms);
 184         add("uniform_slot", &Loader::uniform_slot);
 185         add("uniform_slot", &Loader::uniform_slot2);
 186
 187         // Deprecated
 188         add("texunit",  &Loader::texunit);
 189         add("texunit",  &Loader::texture);
 190         add("texunit",  &Loader::texunit_named);
 191 }
 192
 193 void RenderPass::Loader::set_inline_base_name(const string &n)
 194 {
 195         inline_base_name = n;
 196 }
 197
 198 void RenderPass::Loader::finish()
 199 {
 200         if(obj.material)
 201                 obj.maybe_create_material_shader();
 202 }
 203
 204 // Temporary compatibility feature
 205 string RenderPass::Loader::get_shader_name(const string &n)
 206 {
 207         if(n.size()>=5 && !n.compare(n.size()-5, 5, ".glsl"))
 208         {
 209                 IO::print(IO::cerr, "Warning: Loading module '%s' as shader is deprecated\n", n);
 210                 return n+".shader";
 211         }
 212         return n;
 213 }
 214
 215 void RenderPass::Loader::material_inline()
 216 {
 217         Material::GenericLoader ldr(coll);
 218         load_sub_with(ldr);
 219         RefPtr<Material> mat = ldr.get_material();
 220         get_collection().add(inline_base_name+".mat", mat.get());
 221         obj.material = mat.release();
 222         obj.set_material_textures();
 223 }
 224
 225 void RenderPass::Loader::material(const string &name)
 226 {
 227         obj.material = &get_collection().get<Material>(name);
 228         obj.set_material_textures();
 229 }
 230
 231 void RenderPass::Loader::shader(const string &n)
 232 {
 233         obj.shprog = &get_collection().get<Program>(get_shader_name(n));
 234         obj.shprog_from_material = false;
 235         if(obj.shdata)
 236                 obj.shdata = new ProgramData(*obj.shdata, obj.shprog);
 237 }
 238
 239 void RenderPass::Loader::texture(const string &n)
 240 {
 241         vector<TextureSlot>::iterator i = find_member(obj.textures, Tag(n), &TextureSlot::tag);
 242         if(i==obj.textures.end())
 243         {
 244                 obj.textures.push_back(TextureSlot(n));
 245                 i = obj.textures.end()-1;
 246         }
 247         TextureSlot::Loader ldr(*i, n, coll);
 248         load_sub_with(ldr);
 249 }
 250
 251 void RenderPass::Loader::texunit(unsigned)
 252 {
 253         IO::print(IO::cerr, "Warning: specifying textures by unit number is deprecated and may not produce expected results");
 254         string name;
 255         if(obj.shprog)
 256         {
 257                 const vector<Program::UniformInfo> &uniforms = obj.shprog->get_uniforms();
 258                 for(vector<Program::UniformInfo>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 259                         if(is_image(i->type) && i->binding>=0)
 260                         {
 261                                 if(!name.empty())
 262                                 {
 263                                         name.clear();
 264                                         break;
 265                                 }
 266                                 name = i->name;
 267                         }
 268         }
 269
 270         if(name.empty())
 271                 throw runtime_error("Could not determine name for texture");
 272
 273         texture(name);
 274 }
 275
 276 void RenderPass::Loader::texunit_named(unsigned, const string &n)
 277 {
 278         texture(n);
 279 }
 280
 281 void RenderPass::Loader::uniforms()
 282 {
 283         if(!obj.shprog || obj.shprog_from_material)
 284                 throw runtime_error("Shader is required for uniforms");
 285         if(!obj.shdata)
 286                 obj.shdata = new ProgramData(obj.shprog);
 287         else if(obj.shdata.refcount()>1)
 288                 obj.shdata = new ProgramData(*obj.shdata);
 289         load_sub(*obj.shdata);
 290 }
 291
 292 void RenderPass::Loader::uniform_slot(const string &name)
 293 {
 294         uniform_slot2(name, name);
 295 }
 296
 297 void RenderPass::Loader::uniform_slot2(const string &name, const string &slot)
 298 {
 299         obj.uniform_slots[slot] = name;
 300 }
 301
 302
 303 RenderPass::TextureSlot::Loader::Loader(TextureSlot &ts, const string &an, Collection *c):
 304         CollectionObjectLoader<TextureSlot>(ts, c),
 305         auto_slot_name(an)
 306 {
 307         add("sampler", &TextureSlot::sampler);
 308         add("slot", &Loader::slot_auto);
 309         add("slot", &TextureSlot::slot_name);
 310         add("texture", &TextureSlot::texture);
 311 }
 312
 313 void RenderPass::TextureSlot::Loader::slot_auto()
 314 {
 315         obj.slot_name = auto_slot_name;
 316 }
 317
 318 } // namespace GL
 319 } // namespace Msp