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