source/renderpass.cpp

   1 #include <msp/datafile/collection.h>
   2 #include <msp/strings/format.h>
   3 #include "error.h"
   4 #include "material.h"
   5 #include "renderpass.h"
   6 #include "program.h"
   7 #include "programdata.h"
   8 #include "renderer.h"
   9 #include "texture.h"
  10 #include "texture2d.h"
  11 #include "texturing.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GL {
  17
  18 RenderPass::RenderPass():
  19         shprog(0),
  20         shdata(0),
  21         material(0),
  22         texturing(0),
  23         back_faces(false)
  24 { }
  25
  26 RenderPass::RenderPass(const RenderPass &other):
  27         shprog(other.shprog),
  28         shdata(other.shdata),
  29         uniform_slots(other.uniform_slots),
  30         material(other.material),
  31         material_slot(other.material_slot),
  32         texturing(other.texturing ? new Texturing(*other.texturing) : 0),
  33         tex_names(other.tex_names),
  34         back_faces(other.back_faces)
  35 { }
  36
  37 RenderPass &RenderPass::operator=(const RenderPass &other)
  38 {
  39         shprog = other.shprog;
  40         shdata = other.shdata;
  41         uniform_slots = other.uniform_slots;
  42         material = other.material;
  43         material_slot = other.material_slot;
  44         texturing = other.texturing ? new Texturing(*other.texturing) : 0;
  45         tex_names = other.tex_names;
  46         back_faces = other.back_faces;
  47         return *this;
  48 }
  49
  50 RenderPass::~RenderPass()
  51 {
  52         delete texturing;
  53 }
  54
  55 void RenderPass::ensure_private_shader_data()
  56 {
  57         if(!shprog)
  58                 throw invalid_operation("RenderPass::ensure_private_shader_data");
  59
  60         if(!shdata)
  61                 shdata = new ProgramData(shprog);
  62         else if(shdata.refcount() > 1)
  63                 shdata = new ProgramData(*shdata);
  64 }
  65
  66 void RenderPass::set_shader_program(const Program *prog, const ProgramData *data)
  67 {
  68         shprog = prog;
  69         shdata = (data ? new ProgramData(*data) : 0);
  70 }
  71
  72 const string &RenderPass::get_slotted_uniform_name(const string &slot) const
  73 {
  74         map<string, string>::const_iterator i = uniform_slots.find(slot);
  75         if(i==uniform_slots.end())
  76         {
  77                 static string empty;
  78                 return empty;
  79         }
  80         return i->second;
  81 }
  82
  83 void RenderPass::set_material(const Material *mat)
  84 {
  85         material = mat;
  86         material.keep();
  87 }
  88
  89 void RenderPass::set_texture(unsigned index, const Texture *tex)
  90 {
  91         if(!texturing)
  92                 texturing = new Texturing;
  93
  94         texturing->attach(index, *tex);
  95 }
  96
  97 int RenderPass::get_texture_index(const string &n) const
  98 {
  99         map<string, unsigned>::const_iterator i = tex_names.find(n);
 100         if(i==tex_names.end())
 101                 return -1;
 102         return i->second;
 103 }
 104
 105 void RenderPass::apply(Renderer &renderer) const
 106 {
 107         renderer.set_texturing(texturing);
 108         renderer.set_material(material.get());
 109         renderer.set_shader_program(shprog, shdata.get());
 110         renderer.set_reverse_winding(back_faces);
 111 }
 112
 113
 114 RenderPass::Loader::Loader(RenderPass &p):
 115         DataFile::CollectionObjectLoader<RenderPass>(p, 0)
 116 {
 117         init();
 118 }
 119
 120 RenderPass::Loader::Loader(RenderPass &p, Collection &c):
 121         DataFile::CollectionObjectLoader<RenderPass>(p, &c)
 122 {
 123         init();
 124 }
 125
 126 void RenderPass::Loader::init()
 127 {
 128         add("shader",   &RenderPass::shprog);
 129         add("material", &Loader::material_inline);
 130         add("material", &Loader::material);
 131         add("material_slot", &RenderPass::material_slot);
 132         add("back_faces",&RenderPass::back_faces);
 133         add("texunit",  &Loader::texunit);
 134         add("texunit",  &Loader::texunit_auto);
 135         add("texunit",  &Loader::texunit_named);
 136         add("uniforms", &Loader::uniforms);
 137         add("uniform_slot", &Loader::uniform_slot);
 138 }
 139
 140 void RenderPass::Loader::material_inline()
 141 {
 142         RefPtr<Material> mat = new Material;
 143         if(coll)
 144                 load_sub(*mat, get_collection());
 145         else
 146                 load_sub(*mat);
 147         obj.material = mat;
 148 }
 149
 150 void RenderPass::Loader::material(const string &name)
 151 {
 152         obj.material = &get_collection().get<Material>(name);
 153         obj.material.keep();
 154 }
 155
 156 void RenderPass::Loader::texunit(unsigned i)
 157 {
 158         if(!obj.texturing)
 159                 obj.texturing = new Texturing;
 160         TextureLoader ldr(*obj.texturing, i, coll);
 161         load_sub_with(ldr);
 162 }
 163
 164 void RenderPass::Loader::texunit_auto(const string &n)
 165 {
 166         if(!obj.texturing)
 167                 obj.texturing = new Texturing;
 168         int i = obj.texturing->find_free_unit(n);
 169         if(i<0)
 170                 throw runtime_error("no free texunit");
 171         texunit_named(i, n);
 172 }
 173
 174 void RenderPass::Loader::texunit_named(unsigned i, const string &n)
 175 {
 176         texunit(i);
 177         obj.tex_names[n] = i;
 178         obj.ensure_private_shader_data();
 179         obj.shdata->uniform(n, static_cast<int>(i));
 180 }
 181
 182 void RenderPass::Loader::uniforms()
 183 {
 184         obj.ensure_private_shader_data();
 185         RefPtr<ProgramData> shd = new ProgramData(obj.shprog);
 186         load_sub(*shd);
 187         obj.shdata = shd.release();
 188 }
 189
 190 void RenderPass::Loader::uniform_slot(const string &name)
 191 {
 192         uniform_slot2(name, name);
 193 }
 194
 195 void RenderPass::Loader::uniform_slot2(const string &name, const string &slot)
 196 {
 197         obj.uniform_slots[slot] = name;
 198 }
 199
 200
 201 RenderPass::TextureLoader::TextureLoader(Texturing &t, unsigned i, Collection *c):
 202         DataFile::CollectionObjectLoader<Texturing>(t, c),
 203         index(i)
 204 {
 205         add("texture",   &TextureLoader::texture);
 206         add("texture2d", &TextureLoader::texture2d);
 207 }
 208
 209 void RenderPass::TextureLoader::finish()
 210 {
 211         if(tex)
 212         {
 213                 obj.attach(index, *tex);
 214                 tex.release();
 215         }
 216 }
 217
 218 void RenderPass::TextureLoader::texture(const string &name)
 219 {
 220         tex = &get_collection().get<Texture>(name);
 221         tex.keep();
 222 }
 223
 224 void RenderPass::TextureLoader::texture2d()
 225 {
 226         tex = new Texture2D;
 227         if(coll)
 228                 load_sub(static_cast<Texture2D &>(*tex), get_collection());
 229         else
 230                 load_sub(static_cast<Texture2D &>(*tex));
 231 }
 232
 233 } // namespace GL
 234 } // namespace Msp