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         commands.use_pipeline(pipeline_state);
  32 }
  33
  34 Renderer::~Renderer()
  35 {
  36         end();
  37 }
  38
  39 void Renderer::set_camera(const Camera &c)
  40 {
  41         state->camera = &c;
  42         add_shader_data(c.get_shader_data());
  43         set_matrix(Matrix());
  44 }
  45
  46 void Renderer::set_matrix(const Matrix &matrix)
  47 {
  48         state->model_matrix = matrix;
  49         changed |= MATRIX;
  50 }
  51
  52 void Renderer::transform(const Matrix &matrix)
  53 {
  54         state->model_matrix *= matrix;
  55         changed |= MATRIX;
  56 }
  57
  58 void Renderer::set_framebuffer(const Framebuffer *f)
  59 {
  60         state->framebuffer = f;
  61 }
  62
  63 void Renderer::set_viewport(const Rect *v)
  64 {
  65         state->viewport = v;
  66 }
  67
  68 void Renderer::set_scissor(const Rect *s)
  69 {
  70         state->scissor = s;
  71 }
  72
  73 void Renderer::set_texture(Tag tag, const Texture *tex, const Sampler *samp)
  74 {
  75         if(tex)
  76                 if(ResourceManager *res_mgr = tex->get_manager())
  77                         res_mgr->resource_used(*tex);
  78
  79         if(texture_stack.size()>state->texture_count)
  80         {
  81                 BoundTexture &bt = texture_stack[state->texture_count];
  82                 if(bt.tag==tag && bt.texture==tex && bt.sampler==samp)
  83                 {
  84                         ++state->texture_count;
  85                         return;
  86                 }
  87                 else
  88                         flush_textures();
  89         }
  90
  91         for(vector<BoundTexture>::iterator i=texture_stack.end(); i!=texture_stack.begin(); )
  92                 if((--i)->tag==tag)
  93                 {
  94                         i->replaced = texture_stack.size();
  95                         break;
  96                 }
  97
  98         texture_stack.push_back(BoundTexture());
  99         BoundTexture &bound_tex = texture_stack.back();
 100         bound_tex.tag = tag;
 101         bound_tex.texture = tex;
 102         bound_tex.sampler = samp;
 103         state->texture_count = texture_stack.size();
 104 }
 105
 106 void Renderer::flush_textures()
 107 {
 108         for(unsigned i=0; i<state->texture_count; ++i)
 109                 if(texture_stack[i].replaced>=static_cast<int>(state->texture_count))
 110                         texture_stack[i].replaced = -1;
 111
 112         texture_stack.erase(texture_stack.begin()+state->texture_count, texture_stack.end());
 113 }
 114
 115 void Renderer::set_material(const Material *m)
 116 {
 117         if(m)
 118                 add_shader_data(m->get_shader_data());
 119 }
 120
 121 void Renderer::set_lighting(const Lighting *l)
 122 {
 123         if(l)
 124                 add_shader_data(l->get_shader_data());
 125 }
 126
 127 void Renderer::set_clipping(const Clipping *c)
 128 {
 129         state->clipping = c;
 130         if(c)
 131                 add_shader_data(c->get_shader_data());
 132 }
 133
 134 void Renderer::set_shader_program(const Program *p, const ProgramData *d)
 135 {
 136         state->shprog = p;
 137         if(p && d)
 138                 add_shader_data(*d);
 139 }
 140
 141 void Renderer::add_shader_data(const ProgramData &d)
 142 {
 143         if(state->shdata_count<shdata_stack.size())
 144         {
 145                 const BoundProgramData &top = shdata_stack.back();
 146                 if(top.shdata==&d && top.generation==d.get_generation())
 147                 {
 148                         ++state->shdata_count;
 149                         return;
 150                 }
 151         }
 152
 153         flush_shader_data_();
 154         shdata_stack.push_back(&d);
 155         state->shdata_count = shdata_stack.size();
 156         changed |= SHADER_DATA;
 157 }
 158
 159 void Renderer::flush_shader_data_()
 160 {
 161         if(shdata_stack.size()>state->shdata_count)
 162                 shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 163 }
 164
 165 void Renderer::set_vertex_setup(const VertexSetup *vs)
 166 {
 167         state->vertex_setup = vs;
 168 }
 169
 170 void Renderer::set_front_face(FaceWinding winding)
 171 {
 172         state->front_face = winding;
 173 }
 174
 175 void Renderer::set_face_cull(CullMode cull)
 176 {
 177         state->face_cull = cull;
 178 }
 179
 180 void Renderer::set_depth_test(const DepthTest *dt)
 181 {
 182         state->depth_test = dt;
 183 }
 184
 185 void Renderer::set_stencil_test(const StencilTest *st)
 186 {
 187         state->stencil_test = st;
 188 }
 189
 190 void Renderer::set_blend(const Blend *b)
 191 {
 192         state->blend = b;
 193 }
 194
 195 void Renderer::set_object_lod_bias(unsigned b)
 196 {
 197         state->object_lod_bias = b;
 198 }
 199
 200 void Renderer::push_state()
 201 {
 202         state_stack.push_back(state_stack.back());
 203         state = &state_stack.back();
 204 }
 205
 206 void Renderer::pop_state()
 207 {
 208         if(state_stack.size()==1)
 209                 throw stack_underflow("Renderer::pop_state");
 210
 211         state_stack.pop_back();
 212         state = &state_stack.back();
 213         changed |= MATRIX;
 214 }
 215
 216 void Renderer::end()
 217 {
 218         if(state_stack.size()>1)
 219                 throw invalid_operation("Renderer::end");
 220
 221         *state = State();
 222         shdata_stack.clear();
 223         add_shader_data(standard_shdata);
 224         excluded.clear();
 225
 226         PipelineState::clear();
 227 }
 228
 229 void Renderer::exclude(const Renderable &renderable)
 230 {
 231         excluded.insert(&renderable);
 232 }
 233
 234 void Renderer::include(const Renderable &renderable)
 235 {
 236         excluded.erase(&renderable);
 237 }
 238
 239 void Renderer::render(const Renderable &renderable, Tag tag)
 240 {
 241         if(!excluded.count(&renderable))
 242                 renderable.render(*this, tag);
 243 }
 244
 245 void Renderer::clear()
 246 {
 247         clear(COLOR_BUFFER_BIT|DEPTH_BUFFER_BIT|STENCIL_BUFFER_BIT);
 248 }
 249
 250 void Renderer::clear(BufferBits buffers)
 251 {
 252         pipeline_state.set_framebuffer(state->framebuffer);
 253         commands.clear(buffers);
 254 }
 255
 256 void Renderer::draw(const Batch &batch)
 257 {
 258         apply_state();
 259         batch.refresh();
 260         commands.draw(batch);
 261 }
 262
 263 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 264 {
 265         apply_state();
 266         batch.refresh();
 267         commands.draw_instanced(batch, count);
 268 }
 269
 270 void Renderer::resolve_multisample(Framebuffer &target, BufferBits buffers)
 271 {
 272         if(!state->framebuffer)
 273                 throw invalid_operation("Renderer::resolve_multisample");
 274
 275         unsigned width = state->framebuffer->get_width();
 276         unsigned height = state->framebuffer->get_height();
 277         if(target.get_width()!=width || target.get_height()!=height)
 278                 throw incompatible_data("Renderer::resolve_multisample");
 279
 280         pipeline_state.set_framebuffer(state->framebuffer);
 281         commands.resolve_multisample(target, buffers);
 282 }
 283
 284 void Renderer::apply_state()
 285 {
 286         if(!state->shprog)
 287                 throw invalid_operation("Renderer::apply_state");
 288
 289         if(changed&MATRIX)
 290         {
 291                 standard_shdata.uniform("world_obj_matrix", state->model_matrix);
 292                 LinAl::SquareMatrix<float, 3> nm = state->model_matrix.block<3, 3>(0, 0);
 293                 nm = transpose(invert(nm));
 294                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 295                 changed &= ~MATRIX;
 296         }
 297
 298         pipeline_state.set_framebuffer(state->framebuffer);
 299         pipeline_state.set_viewport(state->viewport);
 300         pipeline_state.set_scissor(state->scissor);
 301
 302         bool shprog_changed = (state->shprog!=pipeline_state.get_shader_program());
 303         pipeline_state.set_shader_program(state->shprog);
 304
 305         if(state->vertex_setup)
 306         {
 307                 if(const VertexArray *array = state->vertex_setup->get_vertex_array())
 308                         array->refresh();
 309                 if(const VertexArray *array = state->vertex_setup->get_instance_array())
 310                         array->refresh();
 311         }
 312         pipeline_state.set_vertex_setup(state->vertex_setup);
 313
 314         pipeline_state.set_front_face(state->front_face);
 315         pipeline_state.set_face_cull(state->face_cull);
 316         pipeline_state.set_enabled_clip_planes(state->clipping ? (1<<state->clipping->get_n_planes())-1 : 0);
 317
 318         if(state->texture_count<texture_stack.size())
 319                 flush_textures();
 320
 321         for(vector<BoundTexture>::const_iterator i=texture_stack.begin(); i!=texture_stack.end(); ++i)
 322         {
 323                 int unit = (i->tag.id ? state->shprog->get_uniform_binding(i->tag) : i->unit);
 324                 if(unit>=0)
 325                         pipeline_state.set_texture(unit, i->texture, i->sampler);
 326         }
 327
 328         bool shdata_changed = changed&SHADER_DATA;
 329         for(vector<BoundProgramData>::const_iterator i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 330                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 331         bool extra_shdata = (shdata_stack.size()>state->shdata_count);
 332
 333         if(shdata_changed || shprog_changed || extra_shdata)
 334         {
 335                 if(extra_shdata)
 336                         shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 337                 for(vector<BoundProgramData>::const_iterator i=shdata_stack.begin(); i!=shdata_stack.end(); ++i)
 338                 {
 339                         i->shdata->apply(*state->shprog, pipeline_state);
 340                         i->generation = i->shdata->get_generation();
 341                 }
 342                 changed &= ~SHADER_DATA;
 343         }
 344
 345         pipeline_state.set_depth_test(state->depth_test);
 346         pipeline_state.set_stencil_test(state->stencil_test);
 347         pipeline_state.set_blend(state->blend);
 348 }
 349
 350
 351 Renderer::BoundTexture::BoundTexture():
 352         unit(-1),
 353         texture(0),
 354         sampler(0),
 355         replaced(-1)
 356 { }
 357
 358
 359 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 360         shdata(d),
 361         generation(0)
 362 { }
 363
 364
 365 Renderer::State::State():
 366         camera(0),
 367         framebuffer(0),
 368         viewport(0),
 369         scissor(0),
 370         texture_count(0),
 371         clipping(0),
 372         shprog(0),
 373         shdata_count(0),
 374         vertex_setup(0),
 375         front_face(NON_MANIFOLD),
 376         face_cull(NO_CULL),
 377         depth_test(0),
 378         stencil_test(0),
 379         blend(0),
 380         object_lod_bias(0)
 381 { }
 382
 383 } // namespace GL
 384 } // namespace Msp