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         changed(0)
  26 {
  27         state_stack.reserve(16);
  28         state_stack.push_back(State());
  29         shdata_stack.reserve(32);
  30         state = &state_stack.back();
  31         add_shader_data(standard_shdata);
  32         commands.use_pipeline(pipeline_state);
  33 }
  34
  35 Renderer::~Renderer()
  36 {
  37         end();
  38 }
  39
  40 void Renderer::set_camera(const Camera &c)
  41 {
  42         state->camera = &c;
  43         add_shader_data(c.get_shader_data());
  44         set_matrix(Matrix());
  45 }
  46
  47 void Renderer::set_matrix(const Matrix &matrix)
  48 {
  49         state->model_matrix = matrix;
  50         changed |= MATRIX;
  51 }
  52
  53 void Renderer::transform(const Matrix &matrix)
  54 {
  55         state->model_matrix *= matrix;
  56         changed |= MATRIX;
  57 }
  58
  59 void Renderer::set_framebuffer(const Framebuffer *f)
  60 {
  61         state->framebuffer = f;
  62 }
  63
  64 void Renderer::set_viewport(const Rect *v)
  65 {
  66         state->viewport = v;
  67 }
  68
  69 void Renderer::set_scissor(const Rect *s)
  70 {
  71         state->scissor = s;
  72 }
  73
  74 void Renderer::set_texture(Tag tag, const Texture *tex, const Sampler *samp)
  75 {
  76         if(tex)
  77                 if(ResourceManager *res_mgr = tex->get_manager())
  78                         res_mgr->resource_used(*tex);
  79
  80         if(texture_stack.size()>state->texture_count)
  81         {
  82                 BoundTexture &bt = texture_stack[state->texture_count];
  83                 if(bt.tag==tag && bt.texture==tex && bt.sampler==samp)
  84                 {
  85                         ++state->texture_count;
  86                         return;
  87                 }
  88                 else
  89                         flush_textures();
  90         }
  91
  92         for(auto i=texture_stack.end(); i!=texture_stack.begin(); )
  93                 if((--i)->tag==tag)
  94                 {
  95                         i->replaced = texture_stack.size();
  96                         break;
  97                 }
  98
  99         texture_stack.push_back(BoundTexture());
 100         BoundTexture &bound_tex = texture_stack.back();
 101         bound_tex.tag = tag;
 102         bound_tex.texture = tex;
 103         bound_tex.sampler = samp;
 104         state->texture_count = texture_stack.size();
 105 }
 106
 107 void Renderer::flush_textures()
 108 {
 109         for(unsigned i=0; i<state->texture_count; ++i)
 110                 if(texture_stack[i].replaced>=static_cast<int>(state->texture_count))
 111                         texture_stack[i].replaced = -1;
 112
 113         texture_stack.erase(texture_stack.begin()+state->texture_count, texture_stack.end());
 114 }
 115
 116 void Renderer::set_material(const Material *m)
 117 {
 118         if(m)
 119                 add_shader_data(m->get_shader_data());
 120 }
 121
 122 void Renderer::set_lighting(const Lighting *l)
 123 {
 124         if(l)
 125                 add_shader_data(l->get_shader_data());
 126 }
 127
 128 void Renderer::set_clipping(const Clipping *c)
 129 {
 130         state->clipping = c;
 131         if(c)
 132                 add_shader_data(c->get_shader_data());
 133 }
 134
 135 void Renderer::set_shader_program(const Program *p, const ProgramData *d)
 136 {
 137         state->shprog = p;
 138         if(p && d)
 139                 add_shader_data(*d);
 140 }
 141
 142 void Renderer::add_shader_data(const ProgramData &d)
 143 {
 144         if(state->shdata_count<shdata_stack.size())
 145         {
 146                 const BoundProgramData &top = shdata_stack.back();
 147                 if(top.shdata==&d && top.generation==d.get_generation())
 148                 {
 149                         ++state->shdata_count;
 150                         return;
 151                 }
 152         }
 153
 154         flush_shader_data_();
 155         shdata_stack.push_back(&d);
 156         state->shdata_count = shdata_stack.size();
 157         changed |= SHADER_DATA;
 158 }
 159
 160 void Renderer::flush_shader_data_()
 161 {
 162         if(shdata_stack.size()>state->shdata_count)
 163                 shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 164 }
 165
 166 void Renderer::set_vertex_setup(const VertexSetup *vs)
 167 {
 168         state->vertex_setup = vs;
 169 }
 170
 171 void Renderer::set_front_face(FaceWinding winding)
 172 {
 173         state->front_face = winding;
 174 }
 175
 176 void Renderer::set_face_cull(CullMode cull)
 177 {
 178         state->face_cull = cull;
 179 }
 180
 181 void Renderer::set_depth_test(const DepthTest *dt)
 182 {
 183         state->depth_test = dt;
 184 }
 185
 186 void Renderer::set_stencil_test(const StencilTest *st)
 187 {
 188         state->stencil_test = st;
 189 }
 190
 191 void Renderer::set_blend(const Blend *b)
 192 {
 193         state->blend = b;
 194 }
 195
 196 void Renderer::set_object_lod_bias(unsigned b)
 197 {
 198         state->object_lod_bias = b;
 199 }
 200
 201 void Renderer::push_state()
 202 {
 203         state_stack.push_back(state_stack.back());
 204         state = &state_stack.back();
 205 }
 206
 207 void Renderer::pop_state()
 208 {
 209         if(state_stack.size()==1)
 210                 throw stack_underflow("Renderer::pop_state");
 211
 212         state_stack.pop_back();
 213         state = &state_stack.back();
 214         changed |= MATRIX;
 215 }
 216
 217 void Renderer::end()
 218 {
 219         if(state_stack.size()>1)
 220                 throw invalid_operation("Renderer::end");
 221
 222         *state = State();
 223         shdata_stack.clear();
 224         add_shader_data(standard_shdata);
 225         excluded.clear();
 226
 227         PipelineState::clear();
 228 }
 229
 230 void Renderer::exclude(const Renderable &renderable)
 231 {
 232         excluded.insert(&renderable);
 233 }
 234
 235 void Renderer::include(const Renderable &renderable)
 236 {
 237         excluded.erase(&renderable);
 238 }
 239
 240 void Renderer::render(const Renderable &renderable, Tag tag)
 241 {
 242         if(!excluded.count(&renderable))
 243                 renderable.render(*this, tag);
 244 }
 245
 246 void Renderer::clear(const ClearValue *values)
 247 {
 248         pipeline_state.set_framebuffer(state->framebuffer);
 249         commands.clear(values);
 250 }
 251
 252 void Renderer::draw(const Batch &batch)
 253 {
 254         apply_state();
 255         batch.refresh();
 256         commands.draw(batch);
 257 }
 258
 259 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 260 {
 261         apply_state();
 262         batch.refresh();
 263         commands.draw_instanced(batch, count);
 264 }
 265
 266 void Renderer::resolve_multisample(Framebuffer &target, BufferBits buffers)
 267 {
 268         if(!state->framebuffer)
 269                 throw invalid_operation("Renderer::resolve_multisample");
 270
 271         unsigned width = state->framebuffer->get_width();
 272         unsigned height = state->framebuffer->get_height();
 273         if(target.get_width()!=width || target.get_height()!=height)
 274                 throw incompatible_data("Renderer::resolve_multisample");
 275
 276         pipeline_state.set_framebuffer(state->framebuffer);
 277         commands.resolve_multisample(target, buffers);
 278 }
 279
 280 void Renderer::apply_state()
 281 {
 282         if(!state->shprog)
 283                 throw invalid_operation("Renderer::apply_state");
 284
 285         if(changed&MATRIX)
 286         {
 287                 standard_shdata.uniform("world_obj_matrix", state->model_matrix);
 288                 LinAl::SquareMatrix<float, 3> nm = state->model_matrix.block<3, 3>(0, 0);
 289                 nm = transpose(invert(nm));
 290                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 291                 changed &= ~MATRIX;
 292         }
 293
 294         pipeline_state.set_framebuffer(state->framebuffer);
 295         pipeline_state.set_viewport(state->viewport);
 296         pipeline_state.set_scissor(state->scissor);
 297
 298         bool shprog_changed = (state->shprog!=pipeline_state.get_shader_program());
 299         pipeline_state.set_shader_program(state->shprog);
 300
 301         if(state->vertex_setup)
 302         {
 303                 if(const VertexArray *array = state->vertex_setup->get_vertex_array())
 304                         array->refresh();
 305                 if(const VertexArray *array = state->vertex_setup->get_instance_array())
 306                         array->refresh();
 307         }
 308         pipeline_state.set_vertex_setup(state->vertex_setup);
 309
 310         pipeline_state.set_front_face(state->front_face);
 311         pipeline_state.set_face_cull(state->face_cull);
 312         pipeline_state.set_enabled_clip_planes(state->clipping ? (1<<state->clipping->get_n_planes())-1 : 0);
 313
 314         if(state->texture_count<texture_stack.size())
 315                 flush_textures();
 316
 317         for(const BoundTexture &t: texture_stack)
 318         {
 319                 int unit = (t.tag.id ? state->shprog->get_uniform_binding(t.tag) : t.unit);
 320                 if(unit>=0)
 321                         pipeline_state.set_texture(unit, t.texture, t.sampler);
 322         }
 323
 324         bool shdata_changed = changed&SHADER_DATA;
 325         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 326                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 327         bool extra_shdata = (shdata_stack.size()>state->shdata_count);
 328
 329         if(shdata_changed || shprog_changed || extra_shdata)
 330         {
 331                 if(extra_shdata)
 332                         shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 333                 for(const BoundProgramData &d: shdata_stack)
 334                 {
 335                         d.shdata->apply(*state->shprog, pipeline_state);
 336                         d.generation = d.shdata->get_generation();
 337                 }
 338                 changed &= ~SHADER_DATA;
 339         }
 340
 341         pipeline_state.set_depth_test(state->depth_test);
 342         pipeline_state.set_stencil_test(state->stencil_test);
 343         pipeline_state.set_blend(state->blend);
 344 }
 345
 346
 347 Renderer::BoundTexture::BoundTexture():
 348         unit(-1),
 349         texture(0),
 350         sampler(0),
 351         replaced(-1)
 352 { }
 353
 354
 355 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 356         shdata(d),
 357         generation(0)
 358 { }
 359
 360
 361 Renderer::State::State():
 362         camera(0),
 363         framebuffer(0),
 364         viewport(0),
 365         scissor(0),
 366         texture_count(0),
 367         clipping(0),
 368         shprog(0),
 369         shdata_count(0),
 370         vertex_setup(0),
 371         front_face(NON_MANIFOLD),
 372         face_cull(NO_CULL),
 373         depth_test(0),
 374         stencil_test(0),
 375         blend(0),
 376         object_lod_bias(0)
 377 { }
 378
 379 } // namespace GL
 380 } // namespace Msp