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