source/render/renderer.cpp

   1 #include "batch.h"
   2 #include "buffer.h"
   3 #include "camera.h"
   4 #include "clipping.h"
   5 #include "deviceinfo.h"
   6 #include "error.h"
   7 #include "lighting.h"
   8 #include "material.h"
   9 #include "program.h"
  10 #include "programdata.h"
  11 #include "renderable.h"
  12 #include "renderer.h"
  13 #include "resourcemanager.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 {
  26         state_stack.reserve(16);
  27         state_stack.push_back(State());
  28         shdata_stack.reserve(32);
  29         state = &state_stack.back();
  30         add_shader_data(standard_shdata);
  31 }
  32
  33 Renderer::~Renderer()
  34 {
  35         end();
  36 }
  37
  38 void Renderer::set_camera(const Camera &c)
  39 {
  40         state->camera = &c;
  41         add_shader_data(c.get_shader_data());
  42         set_matrix(Matrix());
  43 }
  44
  45 void Renderer::set_matrix(const Matrix &matrix)
  46 {
  47         state->model_matrix = matrix;
  48         changed |= MATRIX;
  49 }
  50
  51 void Renderer::transform(const Matrix &matrix)
  52 {
  53         state->model_matrix *= matrix;
  54         changed |= MATRIX;
  55 }
  56
  57 void Renderer::set_texture(Tag tag, const Texture *tex, const Sampler *samp)
  58 {
  59         if(tex)
  60                 if(ResourceManager *res_mgr = tex->get_manager())
  61                         res_mgr->resource_used(*tex);
  62
  63         if(texture_stack.size()>state->texture_count)
  64         {
  65                 BoundTexture &bt = texture_stack[state->texture_count];
  66                 if(bt.tag==tag && bt.texture==tex && bt.sampler==samp)
  67                 {
  68                         ++state->texture_count;
  69                         return;
  70                 }
  71                 else
  72                         flush_textures();
  73         }
  74
  75         for(vector<BoundTexture>::iterator i=texture_stack.end(); i!=texture_stack.begin(); )
  76                 if((--i)->tag==tag)
  77                 {
  78                         i->replaced = texture_stack.size();
  79                         break;
  80                 }
  81
  82         texture_stack.push_back(BoundTexture());
  83         BoundTexture &bound_tex = texture_stack.back();
  84         bound_tex.tag = tag;
  85         bound_tex.texture = tex;
  86         bound_tex.sampler = samp;
  87         state->texture_count = texture_stack.size();
  88 }
  89
  90 void Renderer::flush_textures()
  91 {
  92         for(unsigned i=0; i<state->texture_count; ++i)
  93                 if(texture_stack[i].replaced>=static_cast<int>(state->texture_count))
  94                         texture_stack[i].replaced = -1;
  95
  96         texture_stack.erase(texture_stack.begin()+state->texture_count, texture_stack.end());
  97 }
  98
  99 void Renderer::set_material(const Material *m)
 100 {
 101         if(m)
 102                 add_shader_data(m->get_shader_data());
 103 }
 104
 105 void Renderer::set_lighting(const Lighting *l)
 106 {
 107         if(l)
 108                 add_shader_data(l->get_shader_data());
 109 }
 110
 111 void Renderer::set_clipping(const Clipping *c)
 112 {
 113         state->clipping = c;
 114         if(c)
 115                 add_shader_data(c->get_shader_data());
 116 }
 117
 118 void Renderer::set_shader_program(const Program *p, const ProgramData *d)
 119 {
 120         state->shprog = p;
 121         if(p && d)
 122                 add_shader_data(*d);
 123 }
 124
 125 void Renderer::add_shader_data(const ProgramData &d)
 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::flush_shader_data_()
 144 {
 145         if(shdata_stack.size()>state->shdata_count)
 146                 shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 147 }
 148
 149 void Renderer::set_vertex_setup(const VertexSetup *vs)
 150 {
 151         state->vertex_setup = vs;
 152 }
 153
 154 void Renderer::set_front_face(FaceWinding winding)
 155 {
 156         state->front_face = winding;
 157 }
 158
 159 void Renderer::set_face_cull(CullMode cull)
 160 {
 161         state->face_cull = cull;
 162 }
 163
 164 void Renderer::set_depth_test(const DepthTest *dt)
 165 {
 166         state->depth_test = dt;
 167 }
 168
 169 void Renderer::set_stencil_test(const StencilTest *st)
 170 {
 171         state->stencil_test = st;
 172 }
 173
 174 void Renderer::set_blend(const Blend *b)
 175 {
 176         state->blend = b;
 177 }
 178
 179 void Renderer::set_object_lod_bias(unsigned b)
 180 {
 181         state->object_lod_bias = b;
 182 }
 183
 184 void Renderer::push_state()
 185 {
 186         state_stack.push_back(state_stack.back());
 187         state = &state_stack.back();
 188 }
 189
 190 void Renderer::pop_state()
 191 {
 192         if(state_stack.size()==1)
 193                 throw stack_underflow("Renderer::pop_state");
 194
 195         state_stack.pop_back();
 196         state = &state_stack.back();
 197         changed |= MATRIX;
 198 }
 199
 200 void Renderer::end()
 201 {
 202         if(state_stack.size()>1)
 203                 throw invalid_operation("Renderer::end");
 204
 205         *state = State();
 206         shdata_stack.clear();
 207         add_shader_data(standard_shdata);
 208         excluded.clear();
 209
 210         PipelineState::clear();
 211 }
 212
 213 void Renderer::exclude(const Renderable &renderable)
 214 {
 215         excluded.insert(&renderable);
 216 }
 217
 218 void Renderer::include(const Renderable &renderable)
 219 {
 220         excluded.erase(&renderable);
 221 }
 222
 223 void Renderer::render(const Renderable &renderable, Tag tag)
 224 {
 225         if(!excluded.count(&renderable))
 226                 renderable.render(*this, tag);
 227 }
 228
 229 void Renderer::draw(const Batch &batch)
 230 {
 231         apply_state();
 232
 233         batch.draw();
 234 }
 235
 236 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 237 {
 238         apply_state();
 239
 240         batch.draw_instanced(count);
 241 }
 242
 243 void Renderer::apply_state()
 244 {
 245         if(!state->shprog)
 246                 throw invalid_operation("Renderer::apply_state");
 247
 248         if(changed&MATRIX)
 249         {
 250                 standard_shdata.uniform("world_obj_matrix", state->model_matrix);
 251                 LinAl::SquareMatrix<float, 3> nm = state->model_matrix.block<3, 3>(0, 0);
 252                 nm = transpose(invert(nm));
 253                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 254                 changed &= ~MATRIX;
 255         }
 256
 257         bool shprog_changed = (state->shprog!=pipeline_state.get_shader_program());
 258         pipeline_state.set_shader_program(state->shprog);
 259
 260         if(state->vertex_setup)
 261         {
 262                 if(const VertexArray *array = state->vertex_setup->get_vertex_array())
 263                         array->refresh();
 264                 if(const VertexArray *array = state->vertex_setup->get_instance_array())
 265                         array->refresh();
 266         }
 267         pipeline_state.set_vertex_setup(state->vertex_setup);
 268
 269         pipeline_state.set_front_face(state->front_face);
 270         pipeline_state.set_face_cull(state->face_cull);
 271         pipeline_state.set_enabled_clip_planes(state->clipping ? (1<<state->clipping->get_n_planes())-1 : 0);
 272
 273         if(state->texture_count<texture_stack.size())
 274                 flush_textures();
 275
 276         for(vector<BoundTexture>::const_iterator i=texture_stack.begin(); i!=texture_stack.end(); ++i)
 277         {
 278                 int unit = (i->tag.id ? state->shprog->get_uniform_binding(i->tag) : i->unit);
 279                 if(unit>=0)
 280                         pipeline_state.set_texture(unit, i->texture, i->sampler);
 281         }
 282
 283         bool shdata_changed = changed&SHADER_DATA;
 284         for(vector<BoundProgramData>::const_iterator i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 285                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 286         bool extra_shdata = (shdata_stack.size()>state->shdata_count);
 287
 288         if(shdata_changed || shprog_changed || extra_shdata)
 289         {
 290                 if(extra_shdata)
 291                         shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 292                 for(vector<BoundProgramData>::const_iterator i=shdata_stack.begin(); i!=shdata_stack.end(); ++i)
 293                 {
 294                         i->shdata->apply(*state->shprog, pipeline_state);
 295                         i->generation = i->shdata->get_generation();
 296                 }
 297                 changed &= ~SHADER_DATA;
 298         }
 299
 300         pipeline_state.set_depth_test(state->depth_test);
 301         pipeline_state.set_stencil_test(state->stencil_test);
 302         pipeline_state.set_blend(state->blend);
 303
 304         pipeline_state.apply();
 305 }
 306
 307
 308 Renderer::BoundTexture::BoundTexture():
 309         unit(-1),
 310         texture(0),
 311         sampler(0),
 312         replaced(-1)
 313 { }
 314
 315
 316 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 317         shdata(d),
 318         generation(0)
 319 { }
 320
 321
 322 Renderer::State::State():
 323         camera(0),
 324         texture_count(0),
 325         lowest_effect_texunit(Limits::get_global().max_texture_bindings),
 326         clipping(0),
 327         shprog(0),
 328         shdata_count(0),
 329         vertex_setup(0),
 330         front_face(NON_MANIFOLD),
 331         face_cull(NO_CULL),
 332         depth_test(0),
 333         stencil_test(0),
 334         blend(0),
 335         object_lod_bias(0)
 336 { }
 337
 338 } // namespace GL
 339 } // namespace Msp