source/render/renderer.cpp

   1 #include "batch.h"
   2 #include "buffer.h"
   3 #include "camera.h"
   4 #include "error.h"
   5 #include "framebuffer.h"
   6 #include "lighting.h"
   7 #include "material.h"
   8 #include "program.h"
   9 #include "programdata.h"
  10 #include "renderable.h"
  11 #include "renderer.h"
  12 #include "resourcemanager.h"
  13 #include "resources.h"
  14 #include "sampler.h"
  15 #include "texture.h"
  16 #include "vertexarray.h"
  17 #include "vertexsetup.h"
  18
  19 using namespace std;
  20
  21 namespace Msp {
  22 namespace GL {
  23
  24 const Tag Renderer::world_obj_matrix_tag("world_obj_matrix");
  25 const Tag Renderer::world_obj_normal_matrix_tag("world_obj_normal_matrix");
  26
  27 Renderer::Renderer():
  28         placeholder_texture(Resources::get_global().get<Texture>("_placeholder.png")),
  29         default_sampler(Resources::get_global().get<Sampler>("_linear_clamp.samp"))
  30 {
  31         state_stack.reserve(16);
  32         shdata_stack.reserve(32);
  33         texture_stack.reserve(32);
  34 }
  35
  36 void Renderer::begin()
  37 {
  38         if(current_state)
  39                 throw invalid_operation("Renderer::begin");
  40
  41         ++frame_index;
  42         state_stack.emplace_back();
  43         current_state = &state_stack.back();
  44
  45         RendererBackend::begin();
  46
  47         commands.begin_frame(frame_index);
  48 }
  49
  50 void Renderer::end()
  51 {
  52         if(!current_state || state_stack.size()>1)
  53                 throw invalid_operation("Renderer::end");
  54
  55         RendererBackend::end();
  56
  57         current_state = 0;
  58         state_stack.clear();
  59         texture_stack.clear();
  60         shdata_stack.clear();
  61 }
  62
  63 void Renderer::push_state()
  64 {
  65         if(state_stack.empty())
  66                 throw invalid_operation("Renderer::push_state");
  67
  68         state_stack.push_back(state_stack.back());
  69         current_state = &state_stack.back();
  70 }
  71
  72 void Renderer::pop_state()
  73 {
  74         if(state_stack.size()==1)
  75                 throw stack_underflow("Renderer::pop_state");
  76
  77         uintptr_t old_pipeline = current_state->pipeline_key;
  78
  79         state_stack.pop_back();
  80         current_state = &state_stack.back();
  81         changed |= MATRIX;
  82
  83         if(current_state->pipeline_key!=old_pipeline)
  84                 changed |= PIPELINE_KEY;
  85 }
  86
  87 Renderer::State &Renderer::get_state() const
  88 {
  89 #ifdef DEBUG
  90         if(!current_state)
  91                 throw invalid_operation("Renderer::get_state");
  92 #endif
  93         return *current_state;
  94 }
  95
  96 void Renderer::set_pipeline_key(uintptr_t key)
  97 {
  98         State &state = get_state();
  99         if(key!=state.pipeline_key)
 100         {
 101                 state.pipeline_key = key;
 102                 changed |= PIPELINE_KEY;
 103         }
 104 }
 105
 106 void Renderer::set_camera(const Camera &c)
 107 {
 108         get_state().camera = &c;
 109         set_matrix(Matrix());
 110 }
 111
 112 void Renderer::set_matrix(const Matrix &matrix)
 113 {
 114         get_state().model_matrix = matrix;
 115         changed |= MATRIX;
 116 }
 117
 118 void Renderer::set_framebuffer(const Framebuffer *f)
 119 {
 120         get_state().framebuffer = f;
 121 }
 122
 123 void Renderer::set_viewport(const Rect *v)
 124 {
 125         get_state().viewport = v;
 126 }
 127
 128 void Renderer::set_scissor(const Rect *s)
 129 {
 130         get_state().scissor = s;
 131 }
 132
 133 void Renderer::set_shader_program(const Program *p, const ProgramData *d)
 134 {
 135         get_state().shprog = p;
 136         if(p && d)
 137                 add_shader_data(*d);
 138 }
 139
 140 void Renderer::add_shader_data(const ProgramData &d)
 141 {
 142         State &state = get_state();
 143
 144         if(state.shdata_count<shdata_stack.size())
 145         {
 146                 const BoundProgramData &top = shdata_stack.back();
 147                 if(top.shdata==&d && top.generation==d.get_generation())
 148                 {
 149                         ++state.shdata_count;
 150                         return;
 151                 }
 152         }
 153
 154         flush_shader_data();
 155         shdata_stack.push_back(&d);
 156         state.shdata_count = shdata_stack.size();
 157         changed |= SHADER_DATA;
 158 }
 159
 160 void Renderer::set_texture(Tag tag, const Texture *tex, const Sampler *samp)
 161 {
 162         set_texture(tag, tex, -1, samp);
 163 }
 164
 165 void Renderer::set_texture(Tag tag, const Texture *tex, int level, const Sampler *samp)
 166 {
 167         State &state = get_state();
 168
 169         if(tex)
 170         {
 171                 if(ResourceManager *res_mgr = tex->get_manager())
 172                         res_mgr->resource_used(*tex);
 173                 if(!tex->is_loaded())
 174                         tex = &placeholder_texture;
 175                 if(!samp)
 176                         samp = &default_sampler;
 177         }
 178         else
 179                 samp = 0;
 180
 181         set_resource(texture_stack, state.texture_count, tag, { tex, samp, level });
 182 }
 183
 184 void Renderer::set_storage_texture(Tag tag, const Texture *tex)
 185 {
 186         State &state = get_state();
 187         set_resource(texture_stack, state.texture_count, tag, { tex, 0, 0 });
 188 }
 189
 190 template<typename T>
 191 void Renderer::set_resource(vector<BoundResource<T>> &stack, unsigned &count, Tag tag, const T &res)
 192 {
 193         if(stack.size()>count)
 194         {
 195                 BoundResource<T> &top = stack[count];
 196                 if(top.tag==tag && top.resource==res)
 197                 {
 198                         ++count;
 199                         return;
 200                 }
 201                 else
 202                         flush_resources(stack, count);
 203         }
 204
 205         for(auto i=stack.end(); i!=stack.begin(); )
 206                 if((--i)->tag==tag)
 207                 {
 208                         i->replaced = stack.size();
 209                         break;
 210                 }
 211
 212         stack.emplace_back();
 213         BoundResource<T> &bound_res = stack.back();
 214         bound_res.tag = tag;
 215         bound_res.resource = res;
 216         count = stack.size();
 217 }
 218
 219 void Renderer::flush_shader_data()
 220 {
 221         const State &state = get_state();
 222
 223         if(shdata_stack.size()>state.shdata_count)
 224                 shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 225 }
 226
 227 template<typename T>
 228 void Renderer::flush_resources(vector<BoundResource<T>> &stack, unsigned &count)
 229 {
 230         for(unsigned i=0; i<count; ++i)
 231                 if(stack[i].replaced>=static_cast<int>(count))
 232                         stack[i].replaced = -1;
 233
 234         stack.erase(stack.begin()+count, stack.end());
 235 }
 236
 237 void Renderer::set_vertex_setup(const VertexSetup *vs)
 238 {
 239         get_state().vertex_setup = vs;
 240 }
 241
 242 void Renderer::set_front_face(FaceWinding winding)
 243 {
 244         get_state().front_face = winding;
 245 }
 246
 247 void Renderer::set_face_cull(CullMode cull)
 248 {
 249         get_state().face_cull = cull;
 250 }
 251
 252 void Renderer::set_depth_test(const DepthTest *dt)
 253 {
 254         get_state().depth_test = dt;
 255 }
 256
 257 void Renderer::set_stencil_test(const StencilTest *st)
 258 {
 259         get_state().stencil_test = st;
 260 }
 261
 262 void Renderer::set_blend(const Blend *b)
 263 {
 264         get_state().blend = b;
 265 }
 266
 267 void Renderer::set_object_lod_bias(unsigned b)
 268 {
 269         get_state().object_lod_bias = b;
 270 }
 271
 272 void Renderer::clear(const ClearValue *values)
 273 {
 274         apply_framebuffer();
 275         commands.use_pipeline(&get_pipeline_state());
 276         commands.clear(values);
 277 }
 278
 279 void Renderer::draw(const Batch &batch)
 280 {
 281         apply_state();
 282         batch.refresh(frame_index);
 283         PipelineState &ps = get_pipeline_state();
 284         ps.set_primitive_type(batch.get_type());
 285         commands.use_pipeline(&ps);
 286         commands.draw(batch);
 287 }
 288
 289 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 290 {
 291         apply_state();
 292         batch.refresh(frame_index);
 293         PipelineState &ps = get_pipeline_state();
 294         ps.set_primitive_type(batch.get_type());
 295         commands.use_pipeline(&ps);
 296         commands.draw_instanced(batch, count);
 297 }
 298
 299 void Renderer::dispatch(unsigned count_x, unsigned count_y, unsigned count_z)
 300 {
 301         apply_state();
 302         PipelineState &ps = get_pipeline_state();
 303         commands.use_pipeline(&ps);
 304         commands.dispatch(count_x, count_y, count_z);
 305 }
 306
 307 void Renderer::resolve_multisample(Framebuffer &target)
 308 {
 309         const State &state = get_state();
 310
 311         if(!state.framebuffer)
 312                 throw invalid_operation("Renderer::resolve_multisample");
 313
 314         unsigned width = state.framebuffer->get_width();
 315         unsigned height = state.framebuffer->get_height();
 316         if(target.get_width()!=width || target.get_height()!=height)
 317                 throw incompatible_data("Renderer::resolve_multisample");
 318
 319         apply_framebuffer();
 320         commands.use_pipeline(&get_pipeline_state());
 321         commands.resolve_multisample(target);
 322 }
 323
 324 void Renderer::begin_query(const QueryPool &pool, unsigned index)
 325 {
 326         commands.begin_query(pool, index);
 327 }
 328
 329 void Renderer::end_query(const QueryPool &pool, unsigned index)
 330 {
 331         commands.end_query(pool, index);
 332 }
 333
 334 PipelineState &Renderer::get_pipeline_state()
 335 {
 336         if(changed&PIPELINE_KEY)
 337         {
 338                 RendererBackend::set_pipeline_key(current_state->pipeline_key);
 339                 changed &= ~PIPELINE_KEY;
 340         }
 341
 342         return RendererBackend::get_pipeline_state();
 343 }
 344
 345 void Renderer::apply_framebuffer()
 346 {
 347         const State &state = get_state();
 348
 349         PipelineState &ps = get_pipeline_state();
 350
 351         ps.set_framebuffer(state.framebuffer);
 352         static const Rect default_rect = Rect::max();
 353         ps.set_viewport(state.viewport ? *state.viewport : default_rect);
 354         ps.set_scissor(state.scissor ? *state.scissor : default_rect);
 355 }
 356
 357 void Renderer::apply_state()
 358 {
 359         State &state = get_state();
 360
 361         if(!state.shprog)
 362                 throw invalid_operation("Renderer::apply_state");
 363
 364         apply_framebuffer();
 365
 366         PipelineState &ps = get_pipeline_state();
 367         bool pipeline_changed = (&ps!=last_pipeline);
 368         last_pipeline = &ps;
 369
 370         bool shprog_changed = (state.shprog!=ps.get_shader_program());
 371         ps.set_shader_program(state.shprog);
 372
 373         bool shdata_changed = changed&SHADER_DATA;
 374         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 375                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 376         bool extra_shdata = (shdata_stack.size()>state.shdata_count);
 377
 378         if(changed&CAMERA)
 379         {
 380                 shdata_changed = true;
 381                 changed &= ~CAMERA;
 382         }
 383
 384         if(changed&MATRIX)
 385         {
 386                 standard_shdata.uniform(world_obj_matrix_tag, state.model_matrix);
 387                 LinAl::Matrix<float, 3, 3> nm = state.model_matrix.block<3, 3>(0, 0);
 388                 nm = transpose(invert(nm));
 389                 standard_shdata.uniform(world_obj_normal_matrix_tag, nm);
 390                 changed &= ~MATRIX;
 391                 shdata_changed = true;
 392         }
 393
 394         if(shdata_changed || shprog_changed || pipeline_changed || extra_shdata)
 395         {
 396                 if(extra_shdata)
 397                         shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 398                 standard_shdata.apply(*state.shprog, ps, frame_index);
 399                 if(state.camera)
 400                         state.camera->get_shader_data().apply(*state.shprog, ps, frame_index);
 401                 for(const BoundProgramData &d: shdata_stack)
 402                 {
 403                         d.shdata->apply(*state.shprog, ps, frame_index);
 404                         d.generation = d.shdata->get_generation();
 405                 }
 406                 changed &= ~SHADER_DATA;
 407         }
 408
 409         if(state.vertex_setup)
 410         {
 411                 if(const VertexArray *array = state.vertex_setup->get_vertex_array())
 412                         array->refresh(frame_index);
 413                 if(const VertexArray *array = state.vertex_setup->get_instance_array())
 414                         array->refresh(frame_index);
 415         }
 416         ps.set_vertex_setup(state.vertex_setup);
 417
 418         ps.set_front_face(state.front_face);
 419         ps.set_face_cull(state.face_cull);
 420
 421         if(state.texture_count<texture_stack.size())
 422                 flush_resources(texture_stack, state.texture_count);
 423
 424         for(const BoundResource<SampledTexture> &t: texture_stack)
 425                 if(t.resource.texture && t.replaced<0)
 426                 {
 427                         if(t.binding<0 || shprog_changed)
 428                                 t.binding = state.shprog->get_uniform_binding(t.tag);
 429                         if(t.binding>=0)
 430                         {
 431                                 if(t.resource.sampler)
 432                                         ps.set_texture(t.binding, t.resource.texture, t.resource.level, t.resource.sampler);
 433                                 else
 434                                         ps.set_storage_texture(t.binding, t.resource.texture);
 435                         }
 436                 }
 437
 438         static const DepthTest default_depth_test;
 439         ps.set_depth_test(state.depth_test ? *state.depth_test : default_depth_test);
 440         static const StencilTest default_stencil_test;
 441         ps.set_stencil_test(state.stencil_test ? *state.stencil_test : default_stencil_test);
 442         static const Blend default_blend;
 443         ps.set_blend(state.blend ? *state.blend : default_blend);
 444 }
 445
 446
 447 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 448         shdata(d)
 449 { }
 450
 451 } // namespace GL
 452 } // namespace Msp