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         if(texture_stack.size()>state.texture_count)
 182         {
 183                 BoundTexture &bt = texture_stack[state.texture_count];
 184                 if(bt.tag==tag && bt.texture==tex && bt.sampler==samp)
 185                 {
 186                         ++state.texture_count;
 187                         return;
 188                 }
 189                 else
 190                         flush_textures();
 191         }
 192
 193         for(auto i=texture_stack.end(); i!=texture_stack.begin(); )
 194                 if((--i)->tag==tag)
 195                 {
 196                         i->replaced = texture_stack.size();
 197                         break;
 198                 }
 199
 200         texture_stack.emplace_back();
 201         BoundTexture &bound_tex = texture_stack.back();
 202         bound_tex.tag = tag;
 203         bound_tex.texture = tex;
 204         bound_tex.sampler = samp;
 205         bound_tex.level = level;
 206         state.texture_count = texture_stack.size();
 207 }
 208
 209 void Renderer::flush_shader_data()
 210 {
 211         const State &state = get_state();
 212
 213         if(shdata_stack.size()>state.shdata_count)
 214                 shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 215 }
 216
 217 void Renderer::flush_textures()
 218 {
 219         const State &state = get_state();
 220
 221         for(unsigned i=0; i<state.texture_count; ++i)
 222                 if(texture_stack[i].replaced>=static_cast<int>(state.texture_count))
 223                         texture_stack[i].replaced = -1;
 224
 225         texture_stack.erase(texture_stack.begin()+state.texture_count, texture_stack.end());
 226 }
 227
 228 void Renderer::set_vertex_setup(const VertexSetup *vs)
 229 {
 230         get_state().vertex_setup = vs;
 231 }
 232
 233 void Renderer::set_front_face(FaceWinding winding)
 234 {
 235         get_state().front_face = winding;
 236 }
 237
 238 void Renderer::set_face_cull(CullMode cull)
 239 {
 240         get_state().face_cull = cull;
 241 }
 242
 243 void Renderer::set_depth_test(const DepthTest *dt)
 244 {
 245         get_state().depth_test = dt;
 246 }
 247
 248 void Renderer::set_stencil_test(const StencilTest *st)
 249 {
 250         get_state().stencil_test = st;
 251 }
 252
 253 void Renderer::set_blend(const Blend *b)
 254 {
 255         get_state().blend = b;
 256 }
 257
 258 void Renderer::set_object_lod_bias(unsigned b)
 259 {
 260         get_state().object_lod_bias = b;
 261 }
 262
 263 void Renderer::clear(const ClearValue *values)
 264 {
 265         apply_framebuffer();
 266         commands.use_pipeline(&get_pipeline_state());
 267         commands.clear(values);
 268 }
 269
 270 void Renderer::draw(const Batch &batch)
 271 {
 272         apply_state();
 273         batch.refresh(frame_index);
 274         PipelineState &ps = get_pipeline_state();
 275         ps.set_primitive_type(batch.get_type());
 276         commands.use_pipeline(&ps);
 277         commands.draw(batch);
 278 }
 279
 280 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 281 {
 282         apply_state();
 283         batch.refresh(frame_index);
 284         PipelineState &ps = get_pipeline_state();
 285         ps.set_primitive_type(batch.get_type());
 286         commands.use_pipeline(&ps);
 287         commands.draw_instanced(batch, count);
 288 }
 289
 290 void Renderer::resolve_multisample(Framebuffer &target)
 291 {
 292         const State &state = get_state();
 293
 294         if(!state.framebuffer)
 295                 throw invalid_operation("Renderer::resolve_multisample");
 296
 297         unsigned width = state.framebuffer->get_width();
 298         unsigned height = state.framebuffer->get_height();
 299         if(target.get_width()!=width || target.get_height()!=height)
 300                 throw incompatible_data("Renderer::resolve_multisample");
 301
 302         apply_framebuffer();
 303         commands.use_pipeline(&get_pipeline_state());
 304         commands.resolve_multisample(target);
 305 }
 306
 307 void Renderer::begin_query(const QueryPool &pool, unsigned index)
 308 {
 309         commands.begin_query(pool, index);
 310 }
 311
 312 void Renderer::end_query(const QueryPool &pool, unsigned index)
 313 {
 314         commands.end_query(pool, index);
 315 }
 316
 317 PipelineState &Renderer::get_pipeline_state()
 318 {
 319         if(changed&PIPELINE_KEY)
 320         {
 321                 RendererBackend::set_pipeline_key(current_state->pipeline_key);
 322                 changed &= ~PIPELINE_KEY;
 323         }
 324
 325         return RendererBackend::get_pipeline_state();
 326 }
 327
 328 void Renderer::apply_framebuffer()
 329 {
 330         const State &state = get_state();
 331
 332         PipelineState &ps = get_pipeline_state();
 333
 334         ps.set_framebuffer(state.framebuffer);
 335         static const Rect default_rect = Rect::max();
 336         ps.set_viewport(state.viewport ? *state.viewport : default_rect);
 337         ps.set_scissor(state.scissor ? *state.scissor : default_rect);
 338 }
 339
 340 void Renderer::apply_state()
 341 {
 342         const State &state = get_state();
 343
 344         if(!state.shprog)
 345                 throw invalid_operation("Renderer::apply_state");
 346
 347         apply_framebuffer();
 348
 349         PipelineState &ps = get_pipeline_state();
 350         bool pipeline_changed = (&ps!=last_pipeline);
 351         last_pipeline = &ps;
 352
 353         bool shprog_changed = (state.shprog!=ps.get_shader_program());
 354         ps.set_shader_program(state.shprog);
 355
 356         bool shdata_changed = changed&SHADER_DATA;
 357         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 358                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 359         bool extra_shdata = (shdata_stack.size()>state.shdata_count);
 360
 361         if(changed&CAMERA)
 362         {
 363                 shdata_changed = true;
 364                 changed &= ~CAMERA;
 365         }
 366
 367         if(changed&MATRIX)
 368         {
 369                 standard_shdata.uniform(world_obj_matrix_tag, state.model_matrix);
 370                 LinAl::Matrix<float, 3, 3> nm = state.model_matrix.block<3, 3>(0, 0);
 371                 nm = transpose(invert(nm));
 372                 standard_shdata.uniform(world_obj_normal_matrix_tag, nm);
 373                 changed &= ~MATRIX;
 374                 shdata_changed = true;
 375         }
 376
 377         if(shdata_changed || shprog_changed || pipeline_changed || extra_shdata)
 378         {
 379                 if(extra_shdata)
 380                         shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 381                 standard_shdata.apply(*state.shprog, ps, frame_index);
 382                 if(state.camera)
 383                         state.camera->get_shader_data().apply(*state.shprog, ps, frame_index);
 384                 for(const BoundProgramData &d: shdata_stack)
 385                 {
 386                         d.shdata->apply(*state.shprog, ps, frame_index);
 387                         d.generation = d.shdata->get_generation();
 388                 }
 389                 changed &= ~SHADER_DATA;
 390         }
 391
 392         if(state.vertex_setup)
 393         {
 394                 if(const VertexArray *array = state.vertex_setup->get_vertex_array())
 395                         array->refresh(frame_index);
 396                 if(const VertexArray *array = state.vertex_setup->get_instance_array())
 397                         array->refresh(frame_index);
 398         }
 399         ps.set_vertex_setup(state.vertex_setup);
 400
 401         ps.set_front_face(state.front_face);
 402         ps.set_face_cull(state.face_cull);
 403
 404         if(state.texture_count<texture_stack.size())
 405                 flush_textures();
 406
 407         for(const BoundTexture &t: texture_stack)
 408                 if(t.texture && t.replaced<0)
 409                 {
 410                         if(t.binding<0 || shprog_changed)
 411                                 t.binding = state.shprog->get_uniform_binding(t.tag);
 412                         if(t.binding>=0)
 413                                 ps.set_texture(t.binding, t.texture, t.level, t.sampler);
 414                 }
 415
 416         static const DepthTest default_depth_test;
 417         ps.set_depth_test(state.depth_test ? *state.depth_test : default_depth_test);
 418         static const StencilTest default_stencil_test;
 419         ps.set_stencil_test(state.stencil_test ? *state.stencil_test : default_stencil_test);
 420         static const Blend default_blend;
 421         ps.set_blend(state.blend ? *state.blend : default_blend);
 422 }
 423
 424
 425 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 426         shdata(d)
 427 { }
 428
 429 } // namespace GL
 430 } // namespace Msp