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         image_based_lighting(false)
  28 { }
  29
  30 void RenderPass::set_material_textures()
  31 {
  32         const Tag *material_texture_tags = material->get_texture_tags();
  33         for(const Tag *tag=material_texture_tags; tag->id; ++tag)
  34                 set_texture(*tag, material->get_texture(*tag), material->get_sampler());
  35 }
  36
  37 void RenderPass::maybe_create_material_shader()
  38 {
  39         if(shprog && !shprog_from_material)
  40                 return;
  41
  42         map<string, int> extra_spec;
  43         if(receive_shadows)
  44                 extra_spec["use_shadow_map"] = true;
  45         if(image_based_lighting)
  46                 extra_spec["use_image_based_lighting"] = true;
  47
  48         shprog = material->create_compatible_shader(extra_spec);
  49
  50         if(shdata)
  51                 shdata = new ProgramData(*shdata, shprog);
  52
  53         shprog_from_material = true;
  54 }
  55
  56 void RenderPass::set_shader_program(const Program *prog, const ProgramData *data)
  57 {
  58         shprog = prog;
  59         shprog_from_material = false;
  60         shdata = (data ? new ProgramData(*data) : 0);
  61 }
  62
  63 Tag RenderPass::get_slotted_uniform_tag(Tag slot) const
  64 {
  65         map<Tag, Tag>::const_iterator i = uniform_slots.find(slot);
  66         if(i==uniform_slots.end())
  67                 return Tag();
  68         return i->second;
  69 }
  70
  71 void RenderPass::set_material(const Material *mat)
  72 {
  73         material = mat;
  74         maybe_create_material_shader();
  75         set_material_textures();
  76 }
  77
  78 void RenderPass::set_texture(Tag tag, const Texture *tex, const Sampler *samp)
  79 {
  80         vector<TextureSlot>::iterator i = find_member(textures, tag, &TextureSlot::tag);
  81         if(i==textures.end())
  82         {
  83                 textures.push_back(TextureSlot(tag));
  84                 i = textures.end()-1;
  85         }
  86         i->texture = tex;
  87         if(samp)
  88                 i->sampler = samp;
  89 }
  90
  91 Tag RenderPass::get_texture_tag(const string &slot) const
  92 {
  93         vector<TextureSlot>::const_iterator i = find_member(textures, slot, &TextureSlot::slot_name);
  94         return (i!=textures.end() ? i->tag : Tag());
  95 }
  96
  97 void RenderPass::set_texture(unsigned index, const Texture *tex, const Sampler *samp)
  98 {
  99         if(!shprog)
 100                 throw invalid_operation("RenderPass::set_texture");
 101
 102         const vector<Program::UniformInfo> &uniforms = shprog->get_uniforms();
 103         for(vector<Program::UniformInfo>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 104                 if(is_image(i->type) && i->binding==static_cast<int>(index))
 105                         return set_texture(i->tag, tex, samp);
 106
 107         if(shdata)
 108         {
 109                 const vector<Tag> &tags = shdata->get_uniform_tags();
 110                 for(vector<Tag>::const_iterator i=tags.begin(); i!=tags.end(); ++i)
 111                 {
 112                         vector<Program::UniformInfo>::const_iterator j = find_member(uniforms, *i, &Program::UniformInfo::tag);
 113                         if(j==uniforms.end() || !is_image(j->type))
 114                                 continue;
 115                         if(const Uniform1i *uni1i = dynamic_cast<const Uniform1i *>(shdata->find_uniform(*i)))
 116                                 if(uni1i->get()==static_cast<int>(index))
 117                                         return set_texture(*i, tex, samp);
 118                 }
 119         }
 120 }
 121
 122 int RenderPass::get_texture_index(const string &n) const
 123 {
 124         vector<TextureSlot>::const_iterator i = find_member(textures, n, &TextureSlot::slot_name);
 125         return (shprog && i!=textures.end() ? shprog->get_uniform_binding(i->tag) : -1);
 126 }
 127
 128 void RenderPass::set_back_faces(bool bf)
 129 {
 130         back_faces = bf;
 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);
 143         renderer.set_shader_program(shprog, shdata.get());
 144         renderer.set_reverse_winding(back_faces);
 145 }
 146
 147 void RenderPass::set_debug_name(const string &name)
 148 {
 149 #ifdef DEBUG
 150         if(shdata.refcount()==1)
 151                 shdata->set_debug_name(name+" [UBO]");
 152 #else
 153         (void)name;
 154 #endif
 155 }
 156
 157
 158 DataFile::Loader::ActionMap RenderPass::Loader::shared_actions;
 159
 160 RenderPass::Loader::Loader(RenderPass &p):
 161         DataFile::CollectionObjectLoader<RenderPass>(p, 0)
 162 {
 163         set_actions(shared_actions);
 164 }
 165
 166 RenderPass::Loader::Loader(RenderPass &p, Collection &c):
 167         DataFile::CollectionObjectLoader<RenderPass>(p, &c)
 168 {
 169         set_actions(shared_actions);
 170 }
 171
 172 void RenderPass::Loader::init_actions()
 173 {
 174         add("shader",   &Loader::shader);
 175         add("image_based_lighting", &RenderPass::image_based_lighting);
 176         add("material", &Loader::material_inline);
 177         add("material", &Loader::material);
 178         add("material_slot", &RenderPass::material_slot);
 179         add("back_faces",&RenderPass::back_faces);
 180         add("receive_shadows", &RenderPass::receive_shadows);
 181         add("texture", &Loader::texture);
 182         add("uniforms", &Loader::uniforms);
 183         add("uniform_slot", &Loader::uniform_slot);
 184         add("uniform_slot", &Loader::uniform_slot2);
 185
 186         // Deprecated
 187         add("texunit",  &Loader::texunit);
 188         add("texunit",  &Loader::texture);
 189         add("texunit",  &Loader::texunit_named);
 190 }
 191
 192 void RenderPass::Loader::set_inline_base_name(const string &n)
 193 {
 194         inline_base_name = n;
 195 }
 196
 197 void RenderPass::Loader::finish()
 198 {
 199         if(obj.material)
 200                 obj.maybe_create_material_shader();
 201 }
 202
 203 // Temporary compatibility feature
 204 string RenderPass::Loader::get_shader_name(const string &n)
 205 {
 206         if(n.size()>=5 && !n.compare(n.size()-5, 5, ".glsl"))
 207         {
 208                 IO::print(IO::cerr, "Warning: Loading module '%s' as shader is deprecated\n", n);
 209                 return n+".shader";
 210         }
 211         return n;
 212 }
 213
 214 void RenderPass::Loader::material_inline()
 215 {
 216         Material::GenericLoader ldr(coll);
 217         load_sub_with(ldr);
 218         RefPtr<Material> mat = ldr.get_material();
 219         get_collection().add(inline_base_name+".mat", mat.get());
 220         obj.material = mat.release();
 221         obj.set_material_textures();
 222 }
 223
 224 void RenderPass::Loader::material(const string &name)
 225 {
 226         obj.material = &get_collection().get<Material>(name);
 227         obj.set_material_textures();
 228 }
 229
 230 void RenderPass::Loader::shader(const string &n)
 231 {
 232         obj.shprog = &get_collection().get<Program>(get_shader_name(n));
 233         obj.shprog_from_material = false;
 234         if(obj.shdata)
 235                 obj.shdata = new ProgramData(*obj.shdata, obj.shprog);
 236 }
 237
 238 void RenderPass::Loader::texture(const string &n)
 239 {
 240         vector<TextureSlot>::iterator i = find_member(obj.textures, Tag(n), &TextureSlot::tag);
 241         if(i==obj.textures.end())
 242         {
 243                 obj.textures.push_back(TextureSlot(n));
 244                 i = obj.textures.end()-1;
 245         }
 246         TextureSlot::Loader ldr(*i, n, coll);
 247         load_sub_with(ldr);
 248 }
 249
 250 void RenderPass::Loader::texunit(unsigned)
 251 {
 252         IO::print(IO::cerr, "Warning: specifying textures by unit number is deprecated and may not produce expected results");
 253         string name;
 254         if(obj.shprog)
 255         {
 256                 const vector<Program::UniformInfo> &uniforms = obj.shprog->get_uniforms();
 257                 for(vector<Program::UniformInfo>::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 258                         if(is_image(i->type) && i->binding>=0)
 259                         {
 260                                 if(!name.empty())
 261                                 {
 262                                         name.clear();
 263                                         break;
 264                                 }
 265                                 name = i->name;
 266                         }
 267         }
 268
 269         if(name.empty())
 270                 throw runtime_error("Could not determine name for texture");
 271
 272         texture(name);
 273 }
 274
 275 void RenderPass::Loader::texunit_named(unsigned, const string &n)
 276 {
 277         texture(n);
 278 }
 279
 280 void RenderPass::Loader::uniforms()
 281 {
 282         if(!obj.shprog || obj.shprog_from_material)
 283                 throw runtime_error("Shader is required for uniforms");
 284         if(!obj.shdata)
 285                 obj.shdata = new ProgramData(obj.shprog);
 286         else if(obj.shdata.refcount()>1)
 287                 obj.shdata = new ProgramData(*obj.shdata);
 288         load_sub(*obj.shdata);
 289 }
 290
 291 void RenderPass::Loader::uniform_slot(const string &name)
 292 {
 293         uniform_slot2(name, name);
 294 }
 295
 296 void RenderPass::Loader::uniform_slot2(const string &name, const string &slot)
 297 {
 298         obj.uniform_slots[slot] = name;
 299 }
 300
 301
 302 RenderPass::TextureSlot::Loader::Loader(TextureSlot &ts, const string &an, Collection *c):
 303         CollectionObjectLoader<TextureSlot>(ts, c),
 304         auto_slot_name(an)
 305 {
 306         add("sampler", &TextureSlot::sampler);
 307         add("slot", &Loader::slot_auto);
 308         add("slot", &TextureSlot::slot_name);
 309         add("texture", &TextureSlot::texture);
 310 }
 311
 312 void RenderPass::TextureSlot::Loader::slot_auto()
 313 {
 314         obj.slot_name = auto_slot_name;
 315 }
 316
 317 } // namespace GL
 318 } // namespace Msp