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