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         const State &state = get_state();
 245
 246         pipeline_state.set_framebuffer(state.framebuffer);
 247         pipeline_state.set_viewport(state.viewport);
 248         pipeline_state.set_scissor(state.scissor);
 249         commands.use_pipeline(&pipeline_state);
 250         commands.clear(values);
 251 }
 252
 253 void Renderer::draw(const Batch &batch)
 254 {
 255         apply_state();
 256         batch.refresh(frame_index);
 257         pipeline_state.set_primitive_type(batch.get_type());
 258         commands.use_pipeline(&pipeline_state);
 259         commands.draw(batch);
 260 }
 261
 262 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 263 {
 264         apply_state();
 265         batch.refresh(frame_index);
 266         pipeline_state.set_primitive_type(batch.get_type());
 267         commands.use_pipeline(&pipeline_state);
 268         commands.draw_instanced(batch, count);
 269 }
 270
 271 void Renderer::resolve_multisample(Framebuffer &target)
 272 {
 273         const State &state = get_state();
 274
 275         if(!state.framebuffer)
 276                 throw invalid_operation("Renderer::resolve_multisample");
 277
 278         unsigned width = state.framebuffer->get_width();
 279         unsigned height = state.framebuffer->get_height();
 280         if(target.get_width()!=width || target.get_height()!=height)
 281                 throw incompatible_data("Renderer::resolve_multisample");
 282
 283         pipeline_state.set_framebuffer(state.framebuffer);
 284         commands.use_pipeline(&pipeline_state);
 285         commands.resolve_multisample(target);
 286 }
 287
 288 void Renderer::begin_query(const QueryPool &pool, unsigned index)
 289 {
 290         commands.begin_query(pool, index);
 291 }
 292
 293 void Renderer::end_query(const QueryPool &pool, unsigned index)
 294 {
 295         commands.end_query(pool, index);
 296 }
 297
 298 void Renderer::apply_state()
 299 {
 300         const State &state = get_state();
 301
 302         if(!state.shprog)
 303                 throw invalid_operation("Renderer::apply_state");
 304
 305         pipeline_state.set_framebuffer(state.framebuffer);
 306         pipeline_state.set_viewport(state.viewport);
 307         pipeline_state.set_scissor(state.scissor);
 308
 309         bool shprog_changed = (state.shprog!=pipeline_state.get_shader_program());
 310         pipeline_state.set_shader_program(state.shprog);
 311
 312         if(changed&MATRIX)
 313         {
 314                 standard_shdata.uniform("world_obj_matrix", state.model_matrix);
 315                 LinAl::SquareMatrix<float, 3> nm = state.model_matrix.block<3, 3>(0, 0);
 316                 nm = transpose(invert(nm));
 317                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 318                 changed &= ~MATRIX;
 319         }
 320
 321         bool shdata_changed = changed&SHADER_DATA;
 322         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 323                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 324         bool extra_shdata = (shdata_stack.size()>state.shdata_count);
 325
 326         if(shdata_changed || shprog_changed || extra_shdata)
 327         {
 328                 if(extra_shdata)
 329                         shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 330                 for(const BoundProgramData &d: shdata_stack)
 331                 {
 332                         d.shdata->apply(*state.shprog, pipeline_state, frame_index);
 333                         d.generation = d.shdata->get_generation();
 334                 }
 335                 changed &= ~SHADER_DATA;
 336         }
 337
 338         if(state.vertex_setup)
 339         {
 340                 if(const VertexArray *array = state.vertex_setup->get_vertex_array())
 341                         array->refresh(frame_index);
 342                 if(const VertexArray *array = state.vertex_setup->get_instance_array())
 343                         array->refresh(frame_index);
 344         }
 345         pipeline_state.set_vertex_setup(state.vertex_setup);
 346
 347         pipeline_state.set_front_face(state.front_face);
 348         pipeline_state.set_face_cull(state.face_cull);
 349
 350         if(state.texture_count<texture_stack.size())
 351                 flush_textures();
 352
 353         for(const BoundTexture &t: texture_stack)
 354                 if(t.texture && t.replaced<0)
 355                 {
 356                         if(t.binding<0 || shprog_changed)
 357                                 t.binding = state.shprog->get_uniform_binding(t.tag);
 358                         if(t.binding>=0)
 359                                 pipeline_state.set_texture(t.binding, t.texture, t.level, t.sampler);
 360                 }
 361
 362         pipeline_state.set_depth_test(state.depth_test);
 363         pipeline_state.set_stencil_test(state.stencil_test);
 364         pipeline_state.set_blend(state.blend);
 365 }
 366
 367
 368 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 369         shdata(d)
 370 { }
 371
 372 } // namespace GL
 373 } // namespace Msp