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_shader_program(const Program *p, const ProgramData *d)
 114 {
 115         state->shprog = p;
 116         if(p && d)
 117                 add_shader_data(*d);
 118 }
 119
 120 void Renderer::add_shader_data(const ProgramData &d)
 121 {
 122         if(state->shdata_count<shdata_stack.size())
 123         {
 124                 const BoundProgramData &top = shdata_stack.back();
 125                 if(top.shdata==&d && top.generation==d.get_generation())
 126                 {
 127                         ++state->shdata_count;
 128                         return;
 129                 }
 130         }
 131
 132         flush_shader_data();
 133         shdata_stack.push_back(&d);
 134         state->shdata_count = shdata_stack.size();
 135         changed |= SHADER_DATA;
 136 }
 137
 138 void Renderer::flush_shader_data()
 139 {
 140         if(shdata_stack.size()>state->shdata_count)
 141                 shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 142 }
 143
 144 void Renderer::set_vertex_setup(const VertexSetup *vs)
 145 {
 146         state->vertex_setup = vs;
 147 }
 148
 149 void Renderer::set_front_face(FaceWinding winding)
 150 {
 151         state->front_face = winding;
 152 }
 153
 154 void Renderer::set_face_cull(CullMode cull)
 155 {
 156         state->face_cull = cull;
 157 }
 158
 159 void Renderer::set_depth_test(const DepthTest *dt)
 160 {
 161         state->depth_test = dt;
 162 }
 163
 164 void Renderer::set_stencil_test(const StencilTest *st)
 165 {
 166         state->stencil_test = st;
 167 }
 168
 169 void Renderer::set_blend(const Blend *b)
 170 {
 171         state->blend = b;
 172 }
 173
 174 void Renderer::set_object_lod_bias(unsigned b)
 175 {
 176         state->object_lod_bias = b;
 177 }
 178
 179 void Renderer::push_state()
 180 {
 181         state_stack.push_back(state_stack.back());
 182         state = &state_stack.back();
 183 }
 184
 185 void Renderer::pop_state()
 186 {
 187         if(state_stack.size()==1)
 188                 throw stack_underflow("Renderer::pop_state");
 189
 190         state_stack.pop_back();
 191         state = &state_stack.back();
 192         changed |= MATRIX;
 193 }
 194
 195 void Renderer::end()
 196 {
 197         if(state_stack.size()>1)
 198                 throw invalid_operation("Renderer::end");
 199
 200         *state = State();
 201         shdata_stack.clear();
 202         add_shader_data(standard_shdata);
 203
 204         commands.use_pipeline(0);
 205 }
 206
 207 void Renderer::clear(const ClearValue *values)
 208 {
 209         pipeline_state.set_framebuffer(state->framebuffer);
 210         pipeline_state.set_viewport(state->viewport);
 211         pipeline_state.set_scissor(state->scissor);
 212         commands.use_pipeline(&pipeline_state);
 213         commands.clear(values);
 214 }
 215
 216 void Renderer::draw(const Batch &batch)
 217 {
 218         apply_state();
 219         batch.refresh();
 220         commands.use_pipeline(&pipeline_state);
 221         commands.draw(batch);
 222 }
 223
 224 void Renderer::draw_instanced(const Batch &batch, unsigned count)
 225 {
 226         apply_state();
 227         batch.refresh();
 228         commands.use_pipeline(&pipeline_state);
 229         commands.draw_instanced(batch, count);
 230 }
 231
 232 void Renderer::resolve_multisample(Framebuffer &target)
 233 {
 234         if(!state->framebuffer)
 235                 throw invalid_operation("Renderer::resolve_multisample");
 236
 237         unsigned width = state->framebuffer->get_width();
 238         unsigned height = state->framebuffer->get_height();
 239         if(target.get_width()!=width || target.get_height()!=height)
 240                 throw incompatible_data("Renderer::resolve_multisample");
 241
 242         pipeline_state.set_framebuffer(state->framebuffer);
 243         commands.use_pipeline(&pipeline_state);
 244         commands.resolve_multisample(target);
 245 }
 246
 247 void Renderer::begin_query(const QueryPool &pool, unsigned index)
 248 {
 249         commands.begin_query(pool, index);
 250 }
 251
 252 void Renderer::end_query(const QueryPool &pool, unsigned index)
 253 {
 254         commands.end_query(pool, index);
 255 }
 256
 257 void Renderer::apply_state()
 258 {
 259         if(!state->shprog)
 260                 throw invalid_operation("Renderer::apply_state");
 261
 262         if(changed&MATRIX)
 263         {
 264                 standard_shdata.uniform("world_obj_matrix", state->model_matrix);
 265                 LinAl::SquareMatrix<float, 3> nm = state->model_matrix.block<3, 3>(0, 0);
 266                 nm = transpose(invert(nm));
 267                 standard_shdata.uniform("world_obj_normal_matrix", nm);
 268                 changed &= ~MATRIX;
 269         }
 270
 271         pipeline_state.set_framebuffer(state->framebuffer);
 272         pipeline_state.set_viewport(state->viewport);
 273         pipeline_state.set_scissor(state->scissor);
 274
 275         bool shprog_changed = (state->shprog!=pipeline_state.get_shader_program());
 276         pipeline_state.set_shader_program(state->shprog);
 277
 278         if(state->vertex_setup)
 279         {
 280                 if(const VertexArray *array = state->vertex_setup->get_vertex_array())
 281                         array->refresh();
 282                 if(const VertexArray *array = state->vertex_setup->get_instance_array())
 283                         array->refresh();
 284         }
 285         pipeline_state.set_vertex_setup(state->vertex_setup);
 286
 287         pipeline_state.set_front_face(state->front_face);
 288         pipeline_state.set_face_cull(state->face_cull);
 289
 290         if(state->texture_count<texture_stack.size())
 291                 flush_textures();
 292
 293         for(const BoundTexture &t: texture_stack)
 294                 if(t.texture && t.replaced<0)
 295                 {
 296                         if(t.binding<0 || shprog_changed)
 297                                 t.binding = state->shprog->get_uniform_binding(t.tag);
 298                         if(t.binding>=0)
 299                                 pipeline_state.set_texture(t.binding, t.texture, t.sampler);
 300                 }
 301
 302         bool shdata_changed = changed&SHADER_DATA;
 303         for(auto i=shdata_stack.begin(); (!shdata_changed && i!=shdata_stack.end()); ++i)
 304                 shdata_changed = (i->shdata->get_generation()!=i->generation);
 305         bool extra_shdata = (shdata_stack.size()>state->shdata_count);
 306
 307         if(shdata_changed || shprog_changed || extra_shdata)
 308         {
 309                 if(extra_shdata)
 310                         shdata_stack.erase(shdata_stack.begin()+state->shdata_count, shdata_stack.end());
 311                 for(const BoundProgramData &d: shdata_stack)
 312                 {
 313                         d.shdata->apply(*state->shprog, pipeline_state);
 314                         d.generation = d.shdata->get_generation();
 315                 }
 316                 changed &= ~SHADER_DATA;
 317         }
 318
 319         pipeline_state.set_depth_test(state->depth_test);
 320         pipeline_state.set_stencil_test(state->stencil_test);
 321         pipeline_state.set_blend(state->blend);
 322 }
 323
 324
 325 Renderer::BoundProgramData::BoundProgramData(const ProgramData *d):
 326         shdata(d)
 327 { }
 328
 329 } // namespace GL
 330 } // namespace Msp