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