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         excluded.clear();
 216
 217         commands.use_pipeline(0);
 218 }
 219
 220 void Renderer::exclude(const Renderable &renderable)
 221 {
 222         excluded.insert(&renderable);
 223 }
 224
 225 void Renderer::include(const Renderable &renderable)
 226 {
 227         excluded.erase(&renderable);
 228 }
 229
 230 void Renderer::render(const Renderable &renderable, Tag tag)
 231 {
 232         if(!excluded.count(&renderable))
 233                 renderable.render(*this, tag);
 234 }
 235
 236 void Renderer::clear(const ClearValue *values)
 237 {
 238         pipeline_state.set_framebuffer(state->framebuffer);
 239         pipeline_state.set_viewport(state->viewport);
 240         pipeline_state.set_scissor(state->scissor);
 241         commands.use_pipeline(&pipeline_state);
 242         commands.clear(values);
 243 }
 244
 245 void Renderer::draw(const Batch &batch)
 246 {
 247         apply_state();
 248         batch.refresh();
 249         commands.use_pipeline(&pipeline_state);
 250         commands.draw(batch);
 251 }
 252
 253 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 254 {
 255         apply_state();
 256         batch.refresh();
 257         commands.use_pipeline(&pipeline_state);
 258         commands.draw_instanced(batch, count);
 259 }
 260
 261 void Renderer::resolve_multisample(Framebuffer &target)
 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         if(!state->shprog)
 289                 throw invalid_operation("Renderer::apply_state");
 290
 291         if(changed&MATRIX)
 292         {
 293                 standard_shdata.uniform("world_obj_matrix", state->model_matrix);
 294                 LinAl::SquareMatrix<float, 3> nm = state->model_matrix.block<3, 3>(0, 0);
 295                 nm = transpose(invert(nm));
 296                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 297                 changed &= ~MATRIX;
 298         }
 299
 300         pipeline_state.set_framebuffer(state->framebuffer);
 301         pipeline_state.set_viewport(state->viewport);
 302         pipeline_state.set_scissor(state->scissor);
 303
 304         bool shprog_changed = (state->shprog!=pipeline_state.get_shader_program());
 305         pipeline_state.set_shader_program(state->shprog);
 306
 307         if(state->vertex_setup)
 308         {
 309                 if(const VertexArray *array = state->vertex_setup->get_vertex_array())
 310                         array->refresh();
 311                 if(const VertexArray *array = state->vertex_setup->get_instance_array())
 312                         array->refresh();
 313         }
 314         pipeline_state.set_vertex_setup(state->vertex_setup);
 315
 316         pipeline_state.set_front_face(state->front_face);
 317         pipeline_state.set_face_cull(state->face_cull);
 318
 319         if(state->texture_count<texture_stack.size())
 320                 flush_textures();
 321
 322         for(const BoundTexture &t: texture_stack)
 323         {
 324                 int unit = (t.tag.id ? state->shprog->get_uniform_binding(t.tag) : t.unit);
 325                 if(unit>=0)
 326                         pipeline_state.set_texture(unit, t.texture, t.sampler);
 327         }
 328
 329         bool shdata_changed = changed&SHADER_DATA;
 330         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 331                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 332         bool extra_shdata = (shdata_stack.size()>state->shdata_count);
 333
 334         if(shdata_changed || shprog_changed || extra_shdata)
 335         {
 336                 if(extra_shdata)
 337                         shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 338                 for(const BoundProgramData &d: shdata_stack)
 339                 {
 340                         d.shdata->apply(*state->shprog, pipeline_state);
 341                         d.generation = d.shdata->get_generation();
 342                 }
 343                 changed &= ~SHADER_DATA;
 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