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 "sampler.h"
  14 #include "texture.h"
  15 #include "vertexarray.h"
  16 #include "vertexsetup.h"
  17
  18 using namespace std;
  19
  20 namespace Msp {
  21 namespace GL {
  22
  23 Renderer::Renderer()
  24 {
  25         state_stack.reserve(16);
  26         shdata_stack.reserve(32);
  27         texture_stack.reserve(32);
  28 }
  29
  30 void Renderer::begin()
  31 {
  32         if(current_state)
  33                 throw invalid_operation("Renderer::begin");
  34
  35         ++frame_index;
  36         state_stack.emplace_back();
  37         current_state = &state_stack.back();
  38
  39         RendererBackend::begin();
  40
  41         add_shader_data(standard_shdata);
  42         commands.begin_frame(frame_index);
  43 }
  44
  45 void Renderer::end()
  46 {
  47         if(!current_state || state_stack.size()>1)
  48                 throw invalid_operation("Renderer::end");
  49
  50         RendererBackend::end();
  51
  52         current_state = 0;
  53         state_stack.clear();
  54         texture_stack.clear();
  55         shdata_stack.clear();
  56 }
  57
  58 void Renderer::push_state()
  59 {
  60         if(state_stack.empty())
  61                 throw invalid_operation("Renderer::push_state");
  62
  63         state_stack.push_back(state_stack.back());
  64         current_state = &state_stack.back();
  65 }
  66
  67 void Renderer::pop_state()
  68 {
  69         if(state_stack.size()==1)
  70                 throw stack_underflow("Renderer::pop_state");
  71
  72         state_stack.pop_back();
  73         current_state = &state_stack.back();
  74         changed |= MATRIX;
  75 }
  76
  77 Renderer::State &Renderer::get_state() const
  78 {
  79 #ifdef DEBUG
  80         if(!current_state)
  81                 throw invalid_operation("Renderer::get_state");
  82 #endif
  83         return *current_state;
  84 }
  85
  86 void Renderer::set_camera(const Camera &c)
  87 {
  88         get_state().camera = &c;
  89         add_shader_data(c.get_shader_data());
  90         set_matrix(Matrix());
  91 }
  92
  93 void Renderer::set_matrix(const Matrix &matrix)
  94 {
  95         get_state().model_matrix = matrix;
  96         changed |= MATRIX;
  97 }
  98
  99 void Renderer::set_framebuffer(const Framebuffer *f)
 100 {
 101         get_state().framebuffer = f;
 102 }
 103
 104 void Renderer::set_viewport(const Rect *v)
 105 {
 106         get_state().viewport = v;
 107 }
 108
 109 void Renderer::set_scissor(const Rect *s)
 110 {
 111         get_state().scissor = s;
 112 }
 113
 114 void Renderer::set_shader_program(const Program *p, const ProgramData *d)
 115 {
 116         get_state().shprog = p;
 117         if(p && d)
 118                 add_shader_data(*d);
 119 }
 120
 121 void Renderer::add_shader_data(const ProgramData &d)
 122 {
 123         State &state = get_state();
 124
 125         if(state.shdata_count<shdata_stack.size())
 126         {
 127                 const BoundProgramData &top = shdata_stack.back();
 128                 if(top.shdata==&d && top.generation==d.get_generation())
 129                 {
 130                         ++state.shdata_count;
 131                         return;
 132                 }
 133         }
 134
 135         flush_shader_data();
 136         shdata_stack.push_back(&d);
 137         state.shdata_count = shdata_stack.size();
 138         changed |= SHADER_DATA;
 139 }
 140
 141 void Renderer::set_texture(Tag tag, const Texture *tex, const Sampler *samp)
 142 {
 143         set_texture(tag, tex, -1, samp);
 144 }
 145
 146 void Renderer::set_texture(Tag tag, const Texture *tex, int level, const Sampler *samp)
 147 {
 148         State &state = get_state();
 149
 150         if(tex)
 151                 if(ResourceManager *res_mgr = tex->get_manager())
 152                         res_mgr->resource_used(*tex);
 153
 154         if(texture_stack.size()>state.texture_count)
 155         {
 156                 BoundTexture &bt = texture_stack[state.texture_count];
 157                 if(bt.tag==tag && bt.texture==tex && bt.sampler==samp)
 158                 {
 159                         ++state.texture_count;
 160                         return;
 161                 }
 162                 else
 163                         flush_textures();
 164         }
 165
 166         for(auto i=texture_stack.end(); i!=texture_stack.begin(); )
 167                 if((--i)->tag==tag)
 168                 {
 169                         i->replaced = texture_stack.size();
 170                         break;
 171                 }
 172
 173         texture_stack.emplace_back();
 174         BoundTexture &bound_tex = texture_stack.back();
 175         bound_tex.tag = tag;
 176         bound_tex.texture = tex;
 177         bound_tex.sampler = samp;
 178         bound_tex.level = level;
 179         state.texture_count = texture_stack.size();
 180 }
 181
 182 void Renderer::flush_shader_data()
 183 {
 184         const State &state = get_state();
 185
 186         if(shdata_stack.size()>state.shdata_count)
 187                 shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 188 }
 189
 190 void Renderer::flush_textures()
 191 {
 192         const State &state = get_state();
 193
 194         for(unsigned i=0; i<state.texture_count; ++i)
 195                 if(texture_stack[i].replaced>=static_cast<int>(state.texture_count))
 196                         texture_stack[i].replaced = -1;
 197
 198         texture_stack.erase(texture_stack.begin()+state.texture_count, texture_stack.end());
 199 }
 200
 201 void Renderer::set_vertex_setup(const VertexSetup *vs)
 202 {
 203         get_state().vertex_setup = vs;
 204 }
 205
 206 void Renderer::set_front_face(FaceWinding winding)
 207 {
 208         get_state().front_face = winding;
 209 }
 210
 211 void Renderer::set_face_cull(CullMode cull)
 212 {
 213         get_state().face_cull = cull;
 214 }
 215
 216 void Renderer::set_depth_test(const DepthTest *dt)
 217 {
 218         get_state().depth_test = dt;
 219 }
 220
 221 void Renderer::set_stencil_test(const StencilTest *st)
 222 {
 223         get_state().stencil_test = st;
 224 }
 225
 226 void Renderer::set_blend(const Blend *b)
 227 {
 228         get_state().blend = b;
 229 }
 230
 231 void Renderer::set_object_lod_bias(unsigned b)
 232 {
 233         get_state().object_lod_bias = b;
 234 }
 235
 236 void Renderer::clear(const ClearValue *values)
 237 {
 238         const State &state = get_state();
 239
 240         pipeline_state.set_framebuffer(state.framebuffer);
 241         pipeline_state.set_viewport(state.viewport);
 242         pipeline_state.set_scissor(state.scissor);
 243         commands.use_pipeline(&pipeline_state);
 244         commands.clear(values);
 245 }
 246
 247 void Renderer::draw(const Batch &batch)
 248 {
 249         apply_state();
 250         batch.refresh();
 251         pipeline_state.set_primitive_type(batch.get_type());
 252         commands.use_pipeline(&pipeline_state);
 253         commands.draw(batch);
 254 }
 255
 256 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 257 {
 258         apply_state();
 259         batch.refresh();
 260         pipeline_state.set_primitive_type(batch.get_type());
 261         commands.use_pipeline(&pipeline_state);
 262         commands.draw_instanced(batch, count);
 263 }
 264
 265 void Renderer::resolve_multisample(Framebuffer &target)
 266 {
 267         const State &state = get_state();
 268
 269         if(!state.framebuffer)
 270                 throw invalid_operation("Renderer::resolve_multisample");
 271
 272         unsigned width = state.framebuffer->get_width();
 273         unsigned height = state.framebuffer->get_height();
 274         if(target.get_width()!=width || target.get_height()!=height)
 275                 throw incompatible_data("Renderer::resolve_multisample");
 276
 277         pipeline_state.set_framebuffer(state.framebuffer);
 278         commands.use_pipeline(&pipeline_state);
 279         commands.resolve_multisample(target);
 280 }
 281
 282 void Renderer::begin_query(const QueryPool &pool, unsigned index)
 283 {
 284         commands.begin_query(pool, index);
 285 }
 286
 287 void Renderer::end_query(const QueryPool &pool, unsigned index)
 288 {
 289         commands.end_query(pool, index);
 290 }
 291
 292 void Renderer::apply_state()
 293 {
 294         const State &state = get_state();
 295
 296         if(!state.shprog)
 297                 throw invalid_operation("Renderer::apply_state");
 298
 299         pipeline_state.set_framebuffer(state.framebuffer);
 300         pipeline_state.set_viewport(state.viewport);
 301         pipeline_state.set_scissor(state.scissor);
 302
 303         bool shprog_changed = (state.shprog!=pipeline_state.get_shader_program());
 304         pipeline_state.set_shader_program(state.shprog);
 305
 306         if(changed&MATRIX)
 307         {
 308                 standard_shdata.uniform("world_obj_matrix", state.model_matrix);
 309                 LinAl::SquareMatrix<float, 3> nm = state.model_matrix.block<3, 3>(0, 0);
 310                 nm = transpose(invert(nm));
 311                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 312                 changed &= ~MATRIX;
 313         }
 314
 315         bool shdata_changed = changed&SHADER_DATA;
 316         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 317                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 318         bool extra_shdata = (shdata_stack.size()>state.shdata_count);
 319
 320         if(shdata_changed || shprog_changed || extra_shdata)
 321         {
 322                 if(extra_shdata)
 323                         shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 324                 for(const BoundProgramData &d: shdata_stack)
 325                 {
 326                         d.shdata->apply(*state.shprog, pipeline_state);
 327                         d.generation = d.shdata->get_generation();
 328                 }
 329                 changed &= ~SHADER_DATA;
 330         }
 331
 332         if(state.vertex_setup)
 333         {
 334                 if(const VertexArray *array = state.vertex_setup->get_vertex_array())
 335                         array->refresh();
 336                 if(const VertexArray *array = state.vertex_setup->get_instance_array())
 337                         array->refresh();
 338         }
 339         pipeline_state.set_vertex_setup(state.vertex_setup);
 340
 341         pipeline_state.set_front_face(state.front_face);
 342         pipeline_state.set_face_cull(state.face_cull);
 343
 344         if(state.texture_count<texture_stack.size())
 345                 flush_textures();
 346
 347         for(const BoundTexture &t: texture_stack)
 348                 if(t.texture && t.replaced<0)
 349                 {
 350                         if(t.binding<0 || shprog_changed)
 351                                 t.binding = state.shprog->get_uniform_binding(t.tag);
 352                         if(t.binding>=0)
 353                                 pipeline_state.set_texture(t.binding, t.texture, t.level, t.sampler);
 354                 }
 355
 356         pipeline_state.set_depth_test(state.depth_test);
 357         pipeline_state.set_stencil_test(state.stencil_test);
 358         pipeline_state.set_blend(state.blend);
 359 }
 360
 361
 362 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 363         shdata(d)
 364 { }
 365
 366 } // namespace GL
 367 } // namespace Msp