source/pipeline.cpp

   1 #include <msp/core/maputils.h>
   2 #include "blend.h"
   3 #include "camera.h"
   4 #include "framebuffer.h"
   5 #include "lighting.h"
   6 #include "pipeline.h"
   7 #include "postprocessor.h"
   8 #include "renderbuffer.h"
   9 #include "renderer.h"
  10 #include "tests.h"
  11 #include "texture2d.h"
  12 #include "view.h"
  13
  14 using namespace std;
  15
  16 namespace Msp {
  17 namespace GL {
  18
  19 Pipeline::Pipeline(unsigned w, unsigned h, bool d)
  20 {
  21         init(w, h);
  22         hdr = d;
  23 }
  24
  25 Pipeline::Pipeline(const View &view)
  26 {
  27         init(view.get_width(), view.get_height());
  28 }
  29
  30 void Pipeline::init(unsigned w, unsigned h)
  31 {
  32         camera = 0;
  33         width = w;
  34         height = h;
  35         hdr = false;
  36         samples = 0;
  37         target_ms = 0;
  38         target[0] = 0;
  39         target[1] = 0;
  40 }
  41
  42 Pipeline::~Pipeline()
  43 {
  44         delete target[0];
  45         delete target[1];
  46         delete target_ms;
  47 }
  48
  49 void Pipeline::set_hdr(bool h)
  50 {
  51         if(h==hdr)
  52                 return;
  53
  54         bool old_hdr= hdr;
  55         hdr = h;
  56         try
  57         {
  58                 create_targets(2);
  59         }
  60         catch(...)
  61         {
  62                 hdr = old_hdr;
  63                 throw;
  64         }
  65 }
  66
  67 void Pipeline::set_multisample(unsigned s)
  68 {
  69         if(s==samples)
  70                 return;
  71
  72         unsigned old_samples = samples;
  73         samples = s;
  74         try
  75         {
  76                 create_targets(1);
  77         }
  78         catch(...)
  79         {
  80                 samples = old_samples;
  81                 throw;
  82         }
  83 }
  84
  85 void Pipeline::set_camera(const Camera *c)
  86 {
  87         camera = c;
  88 }
  89
  90 Pipeline::Pass &Pipeline::add_pass(const Tag &tag)
  91 {
  92         passes.push_back(Pass(tag, 0));
  93         return passes.back();
  94 }
  95
  96 void Pipeline::add_renderable(Renderable &r)
  97 {
  98         for(vector<Slot>::iterator i=renderables.begin(); i!=renderables.end(); ++i)
  99                 if(i->renderable==&r)
 100                 {
 101                         i->passes.clear();
 102                         return;
 103                 }
 104
 105         renderables.push_back(&r);
 106 }
 107
 108 void Pipeline::add_renderable_for_pass(Renderable &r, const Tag &tag)
 109 {
 110         for(vector<Slot>::iterator i=renderables.begin(); i!=renderables.end(); ++i)
 111                 if(i->renderable==&r)
 112                 {
 113                         i->passes.insert(tag);
 114                         return;
 115                 }
 116
 117         renderables.push_back(&r);
 118         renderables.back().passes.insert(tag);
 119 }
 120
 121 void Pipeline::remove_renderable(Renderable &r)
 122 {
 123         for(vector<Slot>::iterator i=renderables.begin(); i!=renderables.end(); ++i)
 124                 if(i->renderable==&r)
 125                 {
 126                         renderables.erase(i);
 127                         return;
 128                 }
 129 }
 130
 131 Pipeline::Pass &Pipeline::add_pass(const Tag &tag, Renderable &r)
 132 {
 133         passes.push_back(Pass(tag, &r));
 134         return passes.back();
 135 }
 136
 137 void Pipeline::add_postprocessor(PostProcessor &pp)
 138 {
 139         add_postprocessor(&pp, true);
 140 }
 141
 142 void Pipeline::add_postprocessor_owned(PostProcessor *pp)
 143 {
 144         add_postprocessor(pp, false);
 145 }
 146
 147 void Pipeline::add_postprocessor(PostProcessor *pp, bool keep)
 148 {
 149         postproc.push_back(pp);
 150         if(keep)
 151                 postproc.back().keep();
 152         try
 153         {
 154                 create_targets(0);
 155         }
 156         catch(...)
 157         {
 158                 postproc.pop_back();
 159                 throw;
 160         }
 161 }
 162
 163 void Pipeline::setup_frame(Renderer &renderer)
 164 {
 165         for(PassList::const_iterator i=passes.begin(); i!=passes.end(); ++i)
 166                 if(Renderable *renderable = i->get_renderable())
 167                         renderable->setup_frame(renderer);
 168         for(vector<Slot>::const_iterator i=renderables.begin(); i!=renderables.end(); ++i)
 169                 i->renderable->setup_frame(renderer);
 170 }
 171
 172 void Pipeline::finish_frame()
 173 {
 174         for(PassList::const_iterator i=passes.begin(); i!=passes.end(); ++i)
 175                 if(Renderable *renderable = i->get_renderable())
 176                         renderable->finish_frame();
 177         for(vector<Slot>::const_iterator i=renderables.begin(); i!=renderables.end(); ++i)
 178                 i->renderable->finish_frame();
 179 }
 180
 181 void Pipeline::render()
 182 {
 183         Renderer renderer(camera);
 184         setup_frame(renderer);
 185         render(renderer);
 186         finish_frame();
 187 }
 188
 189 void Pipeline::render(Renderer &renderer, const Tag &tag) const
 190 {
 191         if(tag.id)
 192                 return;
 193
 194         const Framebuffer *out_fbo = Framebuffer::current();
 195         // These are no-ops but will ensure the related state gets restored
 196         BindRestore restore_fbo(out_fbo);
 197         BindRestore restore_depth_test(DepthTest::current());
 198         BindRestore restore_blend(Blend::current());
 199
 200         if(target[0])
 201         {
 202                 Framebuffer &fbo = (samples ? target_ms : target[0])->get_framebuffer();
 203                 fbo.bind();
 204                 fbo.clear(COLOR_BUFFER_BIT|DEPTH_BUFFER_BIT);
 205         }
 206
 207         for(PassList::const_iterator i=passes.begin(); i!=passes.end(); ++i)
 208         {
 209                 if(const DepthTest *dt = i->get_depth_test())
 210                         dt->bind();
 211                 else
 212                         DepthTest::unbind();
 213
 214                 if(const Blend *b = i->get_blend())
 215                         b->bind();
 216                 else
 217                         Blend::unbind();
 218
 219                 renderer.set_lighting(i->get_lighting());
 220                 renderer.set_clipping(i->get_clipping());
 221
 222                 if(const Renderable *renderable = i->get_renderable())
 223                         renderer.render(*renderable, i->get_tag());
 224
 225                 for(vector<Slot>::const_iterator j=renderables.begin(); j!=renderables.end(); ++j)
 226                         if(j->passes.empty() || j->passes.count(i->get_tag()))
 227                                 renderer.render(*j->renderable, i->get_tag());
 228         }
 229
 230         if(target[0])
 231         {
 232                 DepthTest::unbind();
 233                 Blend::unbind();
 234
 235                 if(samples)
 236                         target[0]->blit_from(*target_ms);
 237
 238                 for(unsigned i=0; i<postproc.size(); ++i)
 239                 {
 240                         unsigned j = i%2;
 241                         if(i+1<postproc.size())
 242                                 target[1-j]->get_framebuffer().bind();
 243                         else
 244                                 out_fbo->bind();
 245                         const Texture2D &color = target[j]->get_target_texture(RENDER_COLOR);
 246                         const Texture2D &depth = target[j]->get_target_texture(RENDER_DEPTH);
 247                         postproc[i]->render(renderer, color, depth);
 248                 }
 249         }
 250 }
 251
 252 void Pipeline::create_targets(unsigned recreate)
 253 {
 254         if(recreate>=2)
 255         {
 256                 delete target[0];
 257                 delete target[1];
 258                 target[0] = 0;
 259                 target[1] = 0;
 260         }
 261         if(recreate>=1)
 262         {
 263                 delete target_ms;
 264                 target_ms = 0;
 265         }
 266
 267         PixelFormat color_pf = (hdr ? RGB16F : RGB);
 268         RenderTargetFormat fmt = (RENDER_COLOR,color_pf, RENDER_DEPTH);
 269         if(!postproc.empty() || samples)
 270         {
 271                 if(!target[0])
 272                         target[0] = new RenderTarget(width, height, fmt);
 273                 if(!target[1] && postproc.size()>1)
 274                         target[1] = new RenderTarget(width, height, fmt);
 275         }
 276
 277         if(!target_ms && samples)
 278                 target_ms = new RenderTarget(width, height, samples, fmt);
 279 }
 280
 281
 282 Pipeline::Pass::Pass(const Tag &t, Renderable *r):
 283         tag(t),
 284         lighting(0),
 285         depth_test(0),
 286         blend(0),
 287         clipping(0),
 288         renderable(r)
 289 { }
 290
 291 void Pipeline::Pass::set_lighting(const Lighting *l)
 292 {
 293         lighting = l;
 294 }
 295
 296 void Pipeline::Pass::set_depth_test(const DepthTest *d)
 297 {
 298         depth_test = d;
 299 }
 300
 301 void Pipeline::Pass::set_blend(const Blend *b)
 302 {
 303         blend = b;
 304 }
 305
 306 void Pipeline::Pass::set_clipping(const Clipping *c)
 307 {
 308         clipping =c;
 309 }
 310
 311
 312 Pipeline::Slot::Slot(Renderable *r):
 313         renderable(r)
 314 { }
 315
 316 } // namespace GL
 317 } // namespace Msp