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