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