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         State &state = get_state();
 144
 145         if(tex)
 146                 if(ResourceManager *res_mgr = tex->get_manager())
 147                         res_mgr->resource_used(*tex);
 148
 149         if(texture_stack.size()>state.texture_count)
 150         {
 151                 BoundTexture &bt = texture_stack[state.texture_count];
 152                 if(bt.tag==tag && bt.texture==tex && bt.sampler==samp)
 153                 {
 154                         ++state.texture_count;
 155                         return;
 156                 }
 157                 else
 158                         flush_textures();
 159         }
 160
 161         for(auto i=texture_stack.end(); i!=texture_stack.begin(); )
 162                 if((--i)->tag==tag)
 163                 {
 164                         i->replaced = texture_stack.size();
 165                         break;
 166                 }
 167
 168         texture_stack.emplace_back();
 169         BoundTexture &bound_tex = texture_stack.back();
 170         bound_tex.tag = tag;
 171         bound_tex.texture = tex;
 172         bound_tex.sampler = samp;
 173         state.texture_count = texture_stack.size();
 174 }
 175
 176 void Renderer::flush_shader_data()
 177 {
 178         const State &state = get_state();
 179
 180         if(shdata_stack.size()>state.shdata_count)
 181                 shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 182 }
 183
 184 void Renderer::flush_textures()
 185 {
 186         const State &state = get_state();
 187
 188         for(unsigned i=0; i<state.texture_count; ++i)
 189                 if(texture_stack[i].replaced>=static_cast<int>(state.texture_count))
 190                         texture_stack[i].replaced = -1;
 191
 192         texture_stack.erase(texture_stack.begin()+state.texture_count, texture_stack.end());
 193 }
 194
 195 void Renderer::set_vertex_setup(const VertexSetup *vs)
 196 {
 197         get_state().vertex_setup = vs;
 198 }
 199
 200 void Renderer::set_front_face(FaceWinding winding)
 201 {
 202         get_state().front_face = winding;
 203 }
 204
 205 void Renderer::set_face_cull(CullMode cull)
 206 {
 207         get_state().face_cull = cull;
 208 }
 209
 210 void Renderer::set_depth_test(const DepthTest *dt)
 211 {
 212         get_state().depth_test = dt;
 213 }
 214
 215 void Renderer::set_stencil_test(const StencilTest *st)
 216 {
 217         get_state().stencil_test = st;
 218 }
 219
 220 void Renderer::set_blend(const Blend *b)
 221 {
 222         get_state().blend = b;
 223 }
 224
 225 void Renderer::set_object_lod_bias(unsigned b)
 226 {
 227         get_state().object_lod_bias = b;
 228 }
 229
 230 void Renderer::clear(const ClearValue *values)
 231 {
 232         const State &state = get_state();
 233
 234         pipeline_state.set_framebuffer(state.framebuffer);
 235         pipeline_state.set_viewport(state.viewport);
 236         pipeline_state.set_scissor(state.scissor);
 237         commands.use_pipeline(&pipeline_state);
 238         commands.clear(values);
 239 }
 240
 241 void Renderer::draw(const Batch &batch)
 242 {
 243         apply_state();
 244         batch.refresh();
 245         pipeline_state.set_primitive_type(batch.get_type());
 246         commands.use_pipeline(&pipeline_state);
 247         commands.draw(batch);
 248 }
 249
 250 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 251 {
 252         apply_state();
 253         batch.refresh();
 254         pipeline_state.set_primitive_type(batch.get_type());
 255         commands.use_pipeline(&pipeline_state);
 256         commands.draw_instanced(batch, count);
 257 }
 258
 259 void Renderer::resolve_multisample(Framebuffer &target)
 260 {
 261         const State &state = get_state();
 262
 263         if(!state.framebuffer)
 264                 throw invalid_operation("Renderer::resolve_multisample");
 265
 266         unsigned width = state.framebuffer->get_width();
 267         unsigned height = state.framebuffer->get_height();
 268         if(target.get_width()!=width || target.get_height()!=height)
 269                 throw incompatible_data("Renderer::resolve_multisample");
 270
 271         pipeline_state.set_framebuffer(state.framebuffer);
 272         commands.use_pipeline(&pipeline_state);
 273         commands.resolve_multisample(target);
 274 }
 275
 276 void Renderer::begin_query(const QueryPool &pool, unsigned index)
 277 {
 278         commands.begin_query(pool, index);
 279 }
 280
 281 void Renderer::end_query(const QueryPool &pool, unsigned index)
 282 {
 283         commands.end_query(pool, index);
 284 }
 285
 286 void Renderer::apply_state()
 287 {
 288         const State &state = get_state();
 289
 290         if(!state.shprog)
 291                 throw invalid_operation("Renderer::apply_state");
 292
 293         pipeline_state.set_framebuffer(state.framebuffer);
 294         pipeline_state.set_viewport(state.viewport);
 295         pipeline_state.set_scissor(state.scissor);
 296
 297         bool shprog_changed = (state.shprog!=pipeline_state.get_shader_program());
 298         pipeline_state.set_shader_program(state.shprog);
 299
 300         if(changed&MATRIX)
 301         {
 302                 standard_shdata.uniform("world_obj_matrix", state.model_matrix);
 303                 LinAl::SquareMatrix<float, 3> nm = state.model_matrix.block<3, 3>(0, 0);
 304                 nm = transpose(invert(nm));
 305                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 306                 changed &= ~MATRIX;
 307         }
 308
 309         bool shdata_changed = changed&SHADER_DATA;
 310         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 311                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 312         bool extra_shdata = (shdata_stack.size()>state.shdata_count);
 313
 314         if(shdata_changed || shprog_changed || extra_shdata)
 315         {
 316                 if(extra_shdata)
 317                         shdata_stack.erase(shdata_stack.begin()+state.shdata_count, shdata_stack.end());
 318                 for(const BoundProgramData &d: shdata_stack)
 319                 {
 320                         d.shdata->apply(*state.shprog, pipeline_state);
 321                         d.generation = d.shdata->get_generation();
 322                 }
 323                 changed &= ~SHADER_DATA;
 324         }
 325
 326         if(state.vertex_setup)
 327         {
 328                 if(const VertexArray *array = state.vertex_setup->get_vertex_array())
 329                         array->refresh();
 330                 if(const VertexArray *array = state.vertex_setup->get_instance_array())
 331                         array->refresh();
 332         }
 333         pipeline_state.set_vertex_setup(state.vertex_setup);
 334
 335         pipeline_state.set_front_face(state.front_face);
 336         pipeline_state.set_face_cull(state.face_cull);
 337
 338         if(state.texture_count<texture_stack.size())
 339                 flush_textures();
 340
 341         for(const BoundTexture &t: texture_stack)
 342                 if(t.texture && t.replaced<0)
 343                 {
 344                         if(t.binding<0 || shprog_changed)
 345                                 t.binding = state.shprog->get_uniform_binding(t.tag);
 346                         if(t.binding>=0)
 347                                 pipeline_state.set_texture(t.binding, t.texture, t.sampler);
 348                 }
 349
 350         pipeline_state.set_depth_test(state.depth_test);
 351         pipeline_state.set_stencil_test(state.stencil_test);
 352         pipeline_state.set_blend(state.blend);
 353 }
 354
 355
 356 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 357         shdata(d)
 358 { }
 359
 360 } // namespace GL
 361 } // namespace Msp