source/materials/renderpass.cpp

   1 #include <msp/datafile/collection.h>
   2 #include <msp/io/print.h>
   3 #include <msp/strings/format.h>
   4 #include "error.h"
   5 #include "material.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
  14 using namespace std;
  15
  16 namespace Msp {
  17 namespace GL {
  18
  19 RenderPass::RenderPass():
  20         shprog(0),
  21         shprog_from_material(false),
  22         shdata(0),
  23         material(0),
  24         texturing(0),
  25         back_faces(false)
  26 { }
  27
  28 RenderPass::RenderPass(const RenderPass &other):
  29         shprog(other.shprog),
  30         shprog_from_material(other.shprog_from_material),
  31         shdata(other.shdata),
  32         uniform_slots(other.uniform_slots),
  33         material(other.material),
  34         material_slot(other.material_slot),
  35         texturing(other.texturing ? new Texturing(*other.texturing) : 0),
  36         tex_names(other.tex_names),
  37         back_faces(other.back_faces)
  38 { }
  39
  40 RenderPass &RenderPass::operator=(const RenderPass &other)
  41 {
  42         shprog = other.shprog;
  43         shprog_from_material = other.shprog_from_material;
  44         shdata = other.shdata;
  45         uniform_slots = other.uniform_slots;
  46         material = other.material;
  47         material_slot = other.material_slot;
  48         texturing = other.texturing ? new Texturing(*other.texturing) : 0;
  49         tex_names = other.tex_names;
  50         back_faces = other.back_faces;
  51         return *this;
  52 }
  53
  54 RenderPass::~RenderPass()
  55 {
  56         delete texturing;
  57 }
  58
  59 void RenderPass::finalize_material(DataFile::Collection *coll)
  60 {
  61         maybe_create_material_shader(coll);
  62         ensure_private_shader_data();
  63
  64         if(!texturing)
  65                 texturing = new Texturing;
  66         material->attach_textures_to(*texturing, *shdata);
  67 }
  68
  69 void RenderPass::maybe_create_material_shader(DataFile::Collection *coll)
  70 {
  71         if(shprog && !shprog_from_material)
  72                 return;
  73
  74         if(coll)
  75         {
  76                 shprog = material->create_compatible_shader(*coll);
  77                 shprog.keep();
  78         }
  79         else
  80                 throw invalid_operation("no collection");
  81
  82         if(shdata)
  83                 shdata = new ProgramData(*shdata, shprog.get());
  84
  85         shprog_from_material = true;
  86 }
  87
  88 void RenderPass::ensure_private_shader_data()
  89 {
  90         if(!shprog)
  91                 throw invalid_operation("RenderPass::ensure_private_shader_data");
  92
  93         if(!shdata)
  94                 shdata = new ProgramData(shprog.get());
  95         else if(shdata.refcount()>1)
  96                 shdata = new ProgramData(*shdata);
  97 }
  98
  99 void RenderPass::set_shader_program(const Program *prog, const ProgramData *data)
 100 {
 101         shprog = prog;
 102         shprog.keep();
 103         shprog_from_material = false;
 104         shdata = (data ? new ProgramData(*data) : 0);
 105         if(material)
 106                 finalize_material(0);
 107 }
 108
 109 const string &RenderPass::get_slotted_uniform_name(const string &slot) const
 110 {
 111         map<string, string>::const_iterator i = uniform_slots.find(slot);
 112         if(i==uniform_slots.end())
 113         {
 114                 static string empty;
 115                 return empty;
 116         }
 117         return i->second;
 118 }
 119
 120 void RenderPass::set_material(const Material *mat)
 121 {
 122         material = mat;
 123         material.keep();
 124         finalize_material(0);
 125 }
 126
 127 void RenderPass::set_texture(unsigned index, const Texture *tex, const Sampler *samp)
 128 {
 129         if(!texturing)
 130                 texturing = new Texturing;
 131
 132         texturing->attach(index, *tex, (samp ? samp : texturing->get_attached_sampler(index)));
 133 }
 134
 135 int RenderPass::get_texture_index(const string &n) const
 136 {
 137         map<string, unsigned>::const_iterator i = tex_names.find(n);
 138         if(i==tex_names.end())
 139                 return -1;
 140         return i->second;
 141 }
 142
 143 void RenderPass::apply(Renderer &renderer) const
 144 {
 145         renderer.set_texturing(texturing);
 146         renderer.set_material(material.get());
 147         renderer.set_shader_program(shprog.get(), shdata.get());
 148         renderer.set_reverse_winding(back_faces);
 149 }
 150
 151
 152 RenderPass::Loader::Loader(RenderPass &p):
 153         DataFile::CollectionObjectLoader<RenderPass>(p, 0)
 154 {
 155         init();
 156 }
 157
 158 RenderPass::Loader::Loader(RenderPass &p, Collection &c):
 159         DataFile::CollectionObjectLoader<RenderPass>(p, &c)
 160 {
 161         init();
 162 }
 163
 164 void RenderPass::Loader::init()
 165 {
 166         add("shader",   &Loader::shader);
 167         add("material", &Loader::material_inline);
 168         add("material", &Loader::material);
 169         add("material_slot", &RenderPass::material_slot);
 170         add("back_faces",&RenderPass::back_faces);
 171         add("texunit",  &Loader::texunit);
 172         add("texunit",  &Loader::texunit_auto);
 173         add("texunit",  &Loader::texunit_named);
 174         add("uniforms", &Loader::uniforms);
 175         add("uniform_slot", &Loader::uniform_slot);
 176         add("uniform_slot", &Loader::uniform_slot2);
 177 }
 178
 179 // Temporary compatibility feature
 180 string RenderPass::Loader::get_shader_name(const string &n)
 181 {
 182         if(n.size()>=5 && !n.compare(n.size()-5, 5, ".glsl"))
 183         {
 184                 IO::print(IO::cerr, "Warning: Loading module '%s' as shader is deprecated\n", n);
 185                 return n+".shader";
 186         }
 187         return n;
 188 }
 189
 190 void RenderPass::Loader::material_inline()
 191 {
 192         Material::GenericLoader ldr(coll);
 193         load_sub_with(ldr);
 194         obj.material = ldr.get_material();
 195         obj.finalize_material(coll);
 196 }
 197
 198 void RenderPass::Loader::material(const string &name)
 199 {
 200         obj.material = &get_collection().get<Material>(name);
 201         obj.material.keep();
 202         obj.finalize_material(coll);
 203 }
 204
 205 void RenderPass::Loader::shader(const string &n)
 206 {
 207         obj.shprog = &get_collection().get<Program>(get_shader_name(n));
 208         obj.shprog.keep();
 209         obj.shprog_from_material = false;
 210         if(obj.shdata)
 211                 obj.shdata = new ProgramData(*obj.shdata, obj.shprog.get());
 212         if(obj.material)
 213                 obj.finalize_material(coll);
 214 }
 215
 216 void RenderPass::Loader::texunit(unsigned i)
 217 {
 218         if(!obj.texturing)
 219                 obj.texturing = new Texturing;
 220         TextureLoader ldr(*obj.texturing, i, coll);
 221         load_sub_with(ldr);
 222 }
 223
 224 void RenderPass::Loader::texunit_auto(const string &n)
 225 {
 226         if(!obj.texturing)
 227                 obj.texturing = new Texturing;
 228         int i = obj.texturing->find_free_unit(n);
 229         if(i<0)
 230                 throw runtime_error("no free texunit");
 231         texunit_named(i, n);
 232 }
 233
 234 void RenderPass::Loader::texunit_named(unsigned i, const string &n)
 235 {
 236         texunit(i);
 237         obj.tex_names[n] = i;
 238         obj.ensure_private_shader_data();
 239         obj.shdata->uniform(n, static_cast<int>(i));
 240 }
 241
 242 void RenderPass::Loader::uniforms()
 243 {
 244         obj.ensure_private_shader_data();
 245         load_sub(*obj.shdata);
 246 }
 247
 248 void RenderPass::Loader::uniform_slot(const string &name)
 249 {
 250         uniform_slot2(name, name);
 251 }
 252
 253 void RenderPass::Loader::uniform_slot2(const string &name, const string &slot)
 254 {
 255         obj.uniform_slots[slot] = name;
 256 }
 257
 258
 259 RenderPass::TextureLoader::TextureLoader(Texturing &t, unsigned i, Collection *c):
 260         DataFile::CollectionObjectLoader<Texturing>(t, c),
 261         index(i),
 262         tex(0),
 263         samp(0)
 264 {
 265         add("sampler",   &TextureLoader::sampler);
 266         add("texture",   &TextureLoader::texture);
 267 }
 268
 269 void RenderPass::TextureLoader::finish()
 270 {
 271         if(tex)
 272                 obj.attach(index, *tex, samp);
 273         else if(samp)
 274                 obj.attach(index, *samp);
 275 }
 276
 277 void RenderPass::TextureLoader::sampler(const string &name)
 278 {
 279         samp = &get_collection().get<Sampler>(name);
 280 }
 281
 282 void RenderPass::TextureLoader::texture(const string &name)
 283 {
 284         tex = &get_collection().get<Texture>(name);
 285 }
 286
 287 } // namespace GL
 288 } // namespace Msp