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