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