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