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
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GL {
  17
  18 Pipeline::Pipeline(unsigned w, unsigned h, bool d):
  19         camera(0),
  20         width(w),
  21         height(h),
  22         hdr(d),
  23         samples(0),
  24         target_ms(0),
  25         in_frame(false)
  26 {
  27         target[0] = 0;
  28         target[1] = 0;
  29 }
  30
  31 Pipeline::~Pipeline()
  32 {
  33         delete target[0];
  34         delete target[1];
  35         delete target_ms;
  36 }
  37
  38 void Pipeline::set_hdr(bool h)
  39 {
  40         if(h==hdr)
  41                 return;
  42
  43         bool old_hdr= hdr;
  44         hdr = h;
  45         try
  46         {
  47                 create_targets(2);
  48         }
  49         catch(...)
  50         {
  51                 hdr = old_hdr;
  52                 throw;
  53         }
  54 }
  55
  56 void Pipeline::set_multisample(unsigned s)
  57 {
  58         if(s==samples)
  59                 return;
  60
  61         unsigned old_samples = samples;
  62         samples = s;
  63         try
  64         {
  65                 create_targets(1);
  66         }
  67         catch(...)
  68         {
  69                 samples = old_samples;
  70                 throw;
  71         }
  72 }
  73
  74 void Pipeline::set_camera(const Camera *c)
  75 {
  76         camera = c;
  77 }
  78
  79 Pipeline::Pass &Pipeline::add_pass(const Tag &tag)
  80 {
  81         passes.push_back(Pass(tag));
  82         return passes.back();
  83 }
  84
  85 void Pipeline::add_renderable(const Renderable &r)
  86 {
  87         for(vector<Slot>::iterator i=renderables.begin(); i!=renderables.end(); ++i)
  88                 if(i->renderable==&r)
  89                 {
  90                         i->passes.clear();
  91                         return;
  92                 }
  93
  94         renderables.push_back(&r);
  95 }
  96
  97 void Pipeline::add_renderable_for_pass(const Renderable &r, const Tag &tag)
  98 {
  99         for(vector<Slot>::iterator i=renderables.begin(); i!=renderables.end(); ++i)
 100                 if(i->renderable==&r)
 101                 {
 102                         i->passes.insert(tag);
 103                         return;
 104                 }
 105
 106         renderables.push_back(&r);
 107         renderables.back().passes.insert(tag);
 108 }
 109
 110 void Pipeline::remove_renderable(const Renderable &r)
 111 {
 112         for(vector<Slot>::iterator i=renderables.begin(); i!=renderables.end(); ++i)
 113                 if(i->renderable==&r)
 114                 {
 115                         renderables.erase(i);
 116                         return;
 117                 }
 118 }
 119
 120 void Pipeline::add_postprocessor(PostProcessor &pp)
 121 {
 122         postproc.push_back(&pp);
 123         try
 124         {
 125                 create_targets(0);
 126         }
 127         catch(...)
 128         {
 129                 postproc.pop_back();
 130                 throw;
 131         }
 132 }
 133
 134 void Pipeline::setup_frame() const
 135 {
 136         in_frame = true;
 137         for(vector<Slot>::const_iterator i=renderables.begin(); i!=renderables.end(); ++i)
 138                 i->renderable->setup_frame();
 139 }
 140
 141 void Pipeline::finish_frame() const
 142 {
 143         in_frame = false;
 144         for(vector<Slot>::const_iterator i=renderables.begin(); i!=renderables.end(); ++i)
 145                 i->renderable->finish_frame();
 146 }
 147
 148 void Pipeline::render(const Tag &tag) const
 149 {
 150         if(tag.id)
 151                 return;
 152
 153         Renderer renderer(camera);
 154         render(renderer, tag);
 155 }
 156
 157 void Pipeline::render(Renderer &renderer, const Tag &tag) const
 158 {
 159         if(tag.id)
 160                 return;
 161
 162         bool was_in_frame = in_frame;
 163         if(!in_frame)
 164                 setup_frame();
 165
 166         const Framebuffer *out_fbo = Framebuffer::current();
 167         // XXX Make sure the correct FBO is restored if an exception is thrown
 168
 169         if(target[0])
 170         {
 171                 Framebuffer &fbo = (samples ? target_ms->fbo : target[0]->fbo);
 172                 fbo.bind();
 173                 fbo.clear(COLOR_BUFFER_BIT|DEPTH_BUFFER_BIT);
 174         }
 175
 176         for(PassList::const_iterator i=passes.begin(); i!=passes.end(); ++i)
 177         {
 178                 Bind bind_depth_test(i->get_depth_test());
 179                 Bind bind_blend(i->get_blend());
 180                 renderer.set_lighting(i->get_lighting());
 181                 renderer.set_clipping(i->get_clipping());
 182
 183                 for(vector<Slot>::const_iterator j=renderables.begin(); j!=renderables.end(); ++j)
 184                         if(j->passes.empty() || j->passes.count(i->get_tag()))
 185                                 renderer.render(*j->renderable, i->get_tag());
 186         }
 187
 188         renderer.end();
 189
 190         if(target[0])
 191         {
 192                 if(samples)
 193                         target[0]->fbo.blit_from(target_ms->fbo, COLOR_BUFFER_BIT|DEPTH_BUFFER_BIT, false);
 194
 195                 for(unsigned i=0; i<postproc.size(); ++i)
 196                 {
 197                         unsigned j = i%2;
 198                         if(i+1<postproc.size())
 199                                 target[1-j]->fbo.bind();
 200                         else
 201                                 out_fbo->bind();
 202                         postproc[i]->render(target[j]->color, target[j]->depth);
 203                 }
 204
 205                 out_fbo->bind();
 206         }
 207
 208         if(!was_in_frame)
 209                 finish_frame();
 210 }
 211
 212 void Pipeline::create_targets(unsigned recreate)
 213 {
 214         if(recreate>=2)
 215         {
 216                 delete target[0];
 217                 delete target[1];
 218                 target[0] = 0;
 219                 target[1] = 0;
 220         }
 221         if(recreate>=1)
 222         {
 223                 delete target_ms;
 224                 target_ms = 0;
 225         }
 226
 227         PixelFormat fmt = (hdr ? RGB16F : RGB);
 228         if(!postproc.empty() || samples)
 229         {
 230                 if(!target[0])
 231                         target[0] = new RenderTarget(width, height, fmt);
 232                 if(!target[1] && postproc.size()>1)
 233                         target[1] = new RenderTarget(width, height, fmt);
 234         }
 235
 236         if(!target_ms && samples)
 237                 target_ms = new MultisampleTarget(width, height, samples, fmt);
 238 }
 239
 240
 241 Pipeline::Pass::Pass(const Tag &t):
 242         tag(t),
 243         lighting(0),
 244         depth_test(0),
 245         blend(0),
 246         clipping(0)
 247 { }
 248
 249 void Pipeline::Pass::set_lighting(const Lighting *l)
 250 {
 251         lighting = l;
 252 }
 253
 254 void Pipeline::Pass::set_depth_test(const DepthTest *d)
 255 {
 256         depth_test = d;
 257 }
 258
 259 void Pipeline::Pass::set_blend(const Blend *b)
 260 {
 261         blend = b;
 262 }
 263
 264 void Pipeline::Pass::set_clipping(const Clipping *c)
 265 {
 266         clipping =c;
 267 }
 268
 269
 270 Pipeline::Slot::Slot(const Renderable *r):
 271         renderable(r)
 272 { }
 273
 274
 275 Pipeline::RenderTarget::RenderTarget(unsigned w, unsigned h, PixelFormat f)
 276 {
 277         color.set_min_filter(NEAREST);
 278         color.set_mag_filter(NEAREST);
 279         color.set_wrap(CLAMP_TO_EDGE);
 280         color.storage(f, w, h);
 281         fbo.attach(COLOR_ATTACHMENT0, color, 0);
 282
 283         depth.set_min_filter(NEAREST);
 284         depth.set_mag_filter(NEAREST);
 285         depth.set_wrap(CLAMP_TO_EDGE);
 286         depth.storage(DEPTH_COMPONENT, w, h);
 287         fbo.attach(DEPTH_ATTACHMENT, depth, 0);
 288
 289         fbo.require_complete();
 290 }
 291
 292
 293 Pipeline::MultisampleTarget::MultisampleTarget(unsigned w, unsigned h, unsigned s, PixelFormat f)
 294 {
 295         color.storage_multisample(s, f, w, h);
 296         fbo.attach(COLOR_ATTACHMENT0, color);
 297
 298         depth.storage_multisample(s, DEPTH_COMPONENT, w, h);
 299         fbo.attach(DEPTH_ATTACHMENT, depth);
 300
 301         fbo.require_complete();
 302 }
 303
 304 } // namespace GL
 305 } // namespace Msp