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