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