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 template<typename T>
 185 void Renderer::set_resource(vector<BoundResource<T>> &stack, unsigned &count, Tag tag, const T &res)
 186 {
 187         if(stack.size()>count)
 188         {
 189                 BoundResource<T> &top = stack[count];
 190                 if(top.tag==tag && top.resource==res)
 191                 {
 192                         ++count;
 193                         return;
 194                 }
 195                 else
 196                         flush_resources(stack, count);
 197         }
 198
 199         for(auto i=stack.end(); i!=stack.begin(); )
 200                 if((--i)->tag==tag)
 201                 {
 202                         i->replaced = stack.size();
 203                         break;
 204                 }
 205
 206         stack.emplace_back();
 207         BoundResource<T> &bound_res = stack.back();
 208         bound_res.tag = tag;
 209         bound_res.resource = res;
 210         count = stack.size();
 211 }
 212
 213 void Renderer::flush_shader_data()
 214 {
 215         const State &state = get_state();
 216
 217         if(shdata_stack.size()>state.shdata_count)
 218                 shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 219 }
 220
 221 template<typename T>
 222 void Renderer::flush_resources(vector<BoundResource<T>> &stack, unsigned &count)
 223 {
 224         for(unsigned i=0; i<count; ++i)
 225                 if(stack[i].replaced>=static_cast<int>(count))
 226                         stack[i].replaced = -1;
 227
 228         stack.erase(stack.begin()+count, stack.end());
 229 }
 230
 231 void Renderer::set_vertex_setup(const VertexSetup *vs)
 232 {
 233         get_state().vertex_setup = vs;
 234 }
 235
 236 void Renderer::set_front_face(FaceWinding winding)
 237 {
 238         get_state().front_face = winding;
 239 }
 240
 241 void Renderer::set_face_cull(CullMode cull)
 242 {
 243         get_state().face_cull = cull;
 244 }
 245
 246 void Renderer::set_depth_test(const DepthTest *dt)
 247 {
 248         get_state().depth_test = dt;
 249 }
 250
 251 void Renderer::set_stencil_test(const StencilTest *st)
 252 {
 253         get_state().stencil_test = st;
 254 }
 255
 256 void Renderer::set_blend(const Blend *b)
 257 {
 258         get_state().blend = b;
 259 }
 260
 261 void Renderer::set_object_lod_bias(unsigned b)
 262 {
 263         get_state().object_lod_bias = b;
 264 }
 265
 266 void Renderer::clear(const ClearValue *values)
 267 {
 268         apply_framebuffer();
 269         commands.use_pipeline(&get_pipeline_state());
 270         commands.clear(values);
 271 }
 272
 273 void Renderer::draw(const Batch &batch)
 274 {
 275         apply_state();
 276         batch.refresh(frame_index);
 277         PipelineState &ps = get_pipeline_state();
 278         ps.set_primitive_type(batch.get_type());
 279         commands.use_pipeline(&ps);
 280         commands.draw(batch);
 281 }
 282
 283 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 284 {
 285         apply_state();
 286         batch.refresh(frame_index);
 287         PipelineState &ps = get_pipeline_state();
 288         ps.set_primitive_type(batch.get_type());
 289         commands.use_pipeline(&ps);
 290         commands.draw_instanced(batch, count);
 291 }
 292
 293 void Renderer::resolve_multisample(Framebuffer &target)
 294 {
 295         const State &state = get_state();
 296
 297         if(!state.framebuffer)
 298                 throw invalid_operation("Renderer::resolve_multisample");
 299
 300         unsigned width = state.framebuffer->get_width();
 301         unsigned height = state.framebuffer->get_height();
 302         if(target.get_width()!=width || target.get_height()!=height)
 303                 throw incompatible_data("Renderer::resolve_multisample");
 304
 305         apply_framebuffer();
 306         commands.use_pipeline(&get_pipeline_state());
 307         commands.resolve_multisample(target);
 308 }
 309
 310 void Renderer::begin_query(const QueryPool &pool, unsigned index)
 311 {
 312         commands.begin_query(pool, index);
 313 }
 314
 315 void Renderer::end_query(const QueryPool &pool, unsigned index)
 316 {
 317         commands.end_query(pool, index);
 318 }
 319
 320 PipelineState &Renderer::get_pipeline_state()
 321 {
 322         if(changed&PIPELINE_KEY)
 323         {
 324                 RendererBackend::set_pipeline_key(current_state->pipeline_key);
 325                 changed &= ~PIPELINE_KEY;
 326         }
 327
 328         return RendererBackend::get_pipeline_state();
 329 }
 330
 331 void Renderer::apply_framebuffer()
 332 {
 333         const State &state = get_state();
 334
 335         PipelineState &ps = get_pipeline_state();
 336
 337         ps.set_framebuffer(state.framebuffer);
 338         static const Rect default_rect = Rect::max();
 339         ps.set_viewport(state.viewport ? *state.viewport : default_rect);
 340         ps.set_scissor(state.scissor ? *state.scissor : default_rect);
 341 }
 342
 343 void Renderer::apply_state()
 344 {
 345         State &state = get_state();
 346
 347         if(!state.shprog)
 348                 throw invalid_operation("Renderer::apply_state");
 349
 350         apply_framebuffer();
 351
 352         PipelineState &ps = get_pipeline_state();
 353         bool pipeline_changed = (&ps!=last_pipeline);
 354         last_pipeline = &ps;
 355
 356         bool shprog_changed = (state.shprog!=ps.get_shader_program());
 357         ps.set_shader_program(state.shprog);
 358
 359         bool shdata_changed = changed&SHADER_DATA;
 360         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 361                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 362         bool extra_shdata = (shdata_stack.size()>state.shdata_count);
 363
 364         if(changed&CAMERA)
 365         {
 366                 shdata_changed = true;
 367                 changed &= ~CAMERA;
 368         }
 369
 370         if(changed&MATRIX)
 371         {
 372                 standard_shdata.uniform(world_obj_matrix_tag, state.model_matrix);
 373                 LinAl::Matrix<float, 3, 3> nm = state.model_matrix.block<3, 3>(0, 0);
 374                 nm = transpose(invert(nm));
 375                 standard_shdata.uniform(world_obj_normal_matrix_tag, nm);
 376                 changed &= ~MATRIX;
 377                 shdata_changed = true;
 378         }
 379
 380         if(shdata_changed || shprog_changed || pipeline_changed || extra_shdata)
 381         {
 382                 if(extra_shdata)
 383                         shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 384                 standard_shdata.apply(*state.shprog, ps, frame_index);
 385                 if(state.camera)
 386                         state.camera->get_shader_data().apply(*state.shprog, ps, frame_index);
 387                 for(const BoundProgramData &d: shdata_stack)
 388                 {
 389                         d.shdata->apply(*state.shprog, ps, frame_index);
 390                         d.generation = d.shdata->get_generation();
 391                 }
 392                 changed &= ~SHADER_DATA;
 393         }
 394
 395         if(state.vertex_setup)
 396         {
 397                 if(const VertexArray *array = state.vertex_setup->get_vertex_array())
 398                         array->refresh(frame_index);
 399                 if(const VertexArray *array = state.vertex_setup->get_instance_array())
 400                         array->refresh(frame_index);
 401         }
 402         ps.set_vertex_setup(state.vertex_setup);
 403
 404         ps.set_front_face(state.front_face);
 405         ps.set_face_cull(state.face_cull);
 406
 407         if(state.texture_count<texture_stack.size())
 408                 flush_resources(texture_stack, state.texture_count);
 409
 410         for(const BoundResource<SampledTexture> &t: texture_stack)
 411                 if(t.resource.texture && t.replaced<0)
 412                 {
 413                         if(t.binding<0 || shprog_changed)
 414                                 t.binding = state.shprog->get_uniform_binding(t.tag);
 415                         if(t.binding>=0)
 416                                 ps.set_texture(t.binding, t.resource.texture, t.resource.level, t.resource.sampler);
 417                 }
 418
 419         static const DepthTest default_depth_test;
 420         ps.set_depth_test(state.depth_test ? *state.depth_test : default_depth_test);
 421         static const StencilTest default_stencil_test;
 422         ps.set_stencil_test(state.stencil_test ? *state.stencil_test : default_stencil_test);
 423         static const Blend default_blend;
 424         ps.set_blend(state.blend ? *state.blend : default_blend);
 425 }
 426
 427
 428 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 429         shdata(d)
 430 { }
 431
 432 } // namespace GL
 433 } // namespace Msp