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