source/object.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/strings/formatter.h>
   9 #include "except.h"
  10 #include "material.h"
  11 #include "mesh.h"
  12 #include "object.h"
  13 #include "objectinstance.h"
  14 #include "objectpass.h"
  15 #include "program.h"
  16 #include "programdata.h"
  17 #include "texture.h"
  18 #include "texunit.h"
  19
  20 using namespace std;
  21
  22 namespace Msp {
  23 namespace GL {
  24
  25 Object::Object():
  26         meshes(1, static_cast<Mesh *>(0)),
  27         material(0)
  28 {
  29         normal_pass=&passes[""];
  30 }
  31
  32 Object::~Object()
  33 {
  34         for(map<string, ObjectPass>::iterator i=passes.begin(); i!=passes.end(); ++i)
  35                 delete i->second.shdata;
  36 }
  37
  38 bool Object::has_pass(const string &pn) const
  39 {
  40         return passes.count(pn);
  41 }
  42
  43 const ObjectPass &Object::get_pass(const string &pn) const
  44 {
  45         map<string, ObjectPass>::const_iterator i=passes.find(pn);
  46         if(i==passes.end())
  47                 throw KeyError("Unknown pass");
  48         return i->second;
  49 }
  50
  51 void Object::render(const ObjectInstance *inst) const
  52 {
  53         render(*normal_pass, inst);
  54 }
  55
  56 void Object::render(const string &pn, const ObjectInstance *inst) const
  57 {
  58         render(get_pass(pn), inst);
  59 }
  60
  61 void Object::render(const list<const ObjectInstance *> &insts) const
  62 {
  63         render(*normal_pass, insts);
  64 }
  65
  66 void Object::render(const string &pn, const list<const ObjectInstance *> &insts) const
  67 {
  68         render(get_pass(pn), insts);
  69 }
  70
  71 void Object::setup_render(const ObjectPass &pass) const
  72 {
  73         if(!meshes[0])
  74                 throw InvalidState("Trying to render Object without mesh");
  75
  76         if(pass.shprog)
  77         {
  78                 pass.shprog->bind();
  79                 pass.shdata->apply();
  80                 for(unsigned i=0; i<textures.size(); ++i)
  81                 {
  82                         TexUnit::activate(i);
  83                         textures[i]->bind();
  84                 }
  85         }
  86         else if(!textures.empty())
  87                 textures.front()->bind();
  88
  89         if(material)
  90                 material->apply();
  91 }
  92
  93 void Object::finish_render(const ObjectPass &pass) const
  94 {
  95         if(pass.shprog)
  96                 Program::unbind();
  97         for(unsigned i=textures.size(); i--;)
  98         {
  99                 TexUnit::activate(i);
 100                 Texture::unbind();
 101         }
 102 }
 103
 104 void Object::render(const ObjectPass &pass, const ObjectInstance *inst) const
 105 {
 106         setup_render(pass);
 107
 108         unsigned lod=0;
 109         if(inst)
 110         {
 111                 inst->setup_render(pass);
 112                 lod=min(inst->get_level_of_detail(), meshes.size()-1);
 113         }
 114
 115         meshes[lod]->draw();
 116
 117         if(inst)
 118                 inst->finish_render(pass);
 119
 120         finish_render(pass);
 121 }
 122
 123 void Object::render(const ObjectPass &pass, const list<const ObjectInstance *> &insts) const
 124 {
 125         setup_render(pass);
 126
 127         for(list<const ObjectInstance *>::const_iterator i=insts.begin(); i!=insts.end(); ++i)
 128         {
 129                 (*i)->setup_render(pass);
 130
 131                 unsigned lod=min((*i)->get_level_of_detail(), meshes.size()-1);
 132                 meshes[lod]->draw();
 133
 134                 (*i)->finish_render(pass);
 135         }
 136
 137         finish_render(pass);
 138 }
 139
 140
 141 Object::Loader::Loader(Object &o, Collection &c):
 142         obj(o),
 143         coll(c)
 144 {
 145         add("lod_mesh", &Loader::lod_mesh);
 146         add("material", &Object::material);
 147         add("material_inline", &Loader::material_inline);
 148         add("mesh",     &Loader::mesh);
 149         add("pass",     &Loader::pass);
 150         add("shader",   &Loader::shader);
 151         add("texture",  &Loader::texture);
 152 }
 153
 154 Object::Loader::~Loader()
 155 {
 156         for(map<string, ObjectPass>::iterator i=obj.passes.begin(); i!=obj.passes.end(); ++i)
 157                 if(i->second.shdata)
 158                 {
 159                         for(unsigned j=0; j<textures.size(); ++j)
 160                                 i->second.shdata->uniform(i->second.shprog->get_uniform_location(textures[j]), static_cast<int>(j));
 161                 }
 162 }
 163
 164 void Object::Loader::lod_mesh(unsigned l, const string &n)
 165 {
 166         obj.meshes.resize(l+1, 0);
 167         obj.meshes[l]=&coll.get<Mesh>(n);
 168 }
 169
 170 void Object::Loader::material_inline()
 171 {
 172         throw Exception("material_inline not supported yet");
 173         /*RefPtr<Material> mat=new Material;
 174         load_sub(*mat);
 175         coll.add(format("%p%p", &obj, mat.get()), mat.get());
 176         obj.material=mat.release();*/
 177 }
 178
 179 void Object::Loader::mesh(const string &n)
 180 {
 181         obj.meshes[0]=&coll.get<Mesh>(n);
 182 }
 183
 184 void Object::Loader::pass(const string &n)
 185 {
 186         if(obj.passes.count(n))
 187                 throw KeyError("Duplicate pass name");
 188         ObjectPass p;
 189         load_sub(p, coll);
 190         obj.passes[n]=p;
 191 }
 192
 193 void Object::Loader::shader(const string &n)
 194 {
 195         Program *shprog=&coll.get<Program>(n);
 196         if(shprog)  // Allow for unsupported shaders
 197         {
 198                 RefPtr<ProgramData> shdata=new ProgramData;
 199                 load_sub(*shdata, *shprog);
 200
 201                 obj.normal_pass->shprog=shprog;
 202                 if(obj.normal_pass->shdata)
 203                         delete obj.normal_pass->shdata;
 204                 obj.normal_pass->shdata=shdata.release();
 205         }
 206 }
 207
 208 void Object::Loader::texture(const string &n)
 209 {
 210         unsigned eqsign=n.find('=');
 211         if(eqsign!=string::npos)
 212         {
 213                 obj.textures.push_back(&coll.get<Texture>(n.substr(eqsign+1)));
 214                 textures.push_back(n.substr(0, eqsign));
 215         }
 216         else
 217         {
 218                 obj.textures.push_back(&coll.get<Texture>(n));
 219                 textures.push_back(n);
 220         }
 221 }
 222
 223 } // namespace GL
 224 } // namespace Msp