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