source/render/sequence.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 "postprocessor.h"
   7 #include "renderbuffer.h"
   8 #include "renderer.h"
   9 #include "sequence.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 Sequence::Sequence(unsigned w, unsigned h, bool d)
  20 {
  21         init(w, h);
  22         hdr = d;
  23 }
  24
  25 Sequence::Sequence(const View &view)
  26 {
  27         init(view.get_width(), view.get_height());
  28 }
  29
  30 Sequence::Sequence(const Framebuffer &fbo)
  31 {
  32         init(fbo.get_width(), fbo.get_height());
  33 }
  34
  35 void Sequence::init(unsigned w, unsigned h)
  36 {
  37         camera = 0;
  38         width = w;
  39         height = h;
  40         hdr = false;
  41         alpha = false;
  42         samples = 0;
  43         target_ms = 0;
  44         target[0] = 0;
  45         target[1] = 0;
  46 }
  47
  48 Sequence::~Sequence()
  49 {
  50         delete target[0];
  51         delete target[1];
  52         delete target_ms;
  53 }
  54
  55 void Sequence::set_hdr(bool h)
  56 {
  57         if(h==hdr)
  58                 return;
  59
  60         bool old_hdr = hdr;
  61         hdr = h;
  62         try
  63         {
  64                 create_targets(2);
  65         }
  66         catch(...)
  67         {
  68                 hdr = old_hdr;
  69                 throw;
  70         }
  71 }
  72
  73 void Sequence::set_alpha(bool a)
  74 {
  75         if(a==alpha)
  76                 return;
  77
  78         bool old_alpha = alpha;
  79         alpha = a;
  80         try
  81         {
  82                 create_targets(2);
  83         }
  84         catch(...)
  85         {
  86                 alpha = old_alpha;
  87                 throw;
  88         }
  89 }
  90
  91 void Sequence::set_multisample(unsigned s)
  92 {
  93         if(s==samples)
  94                 return;
  95
  96         unsigned old_samples = samples;
  97         samples = s;
  98         try
  99         {
 100                 create_targets(1);
 101         }
 102         catch(...)
 103         {
 104                 samples = old_samples;
 105                 throw;
 106         }
 107 }
 108
 109 Sequence::Step &Sequence::add_step(Tag tag, Renderable &r)
 110 {
 111         steps.push_back(Step(tag, &r));
 112         return steps.back();
 113 }
 114
 115 void Sequence::add_postprocessor(PostProcessor &pp)
 116 {
 117         add_postprocessor(&pp, true);
 118 }
 119
 120 void Sequence::add_postprocessor_owned(PostProcessor *pp)
 121 {
 122         add_postprocessor(pp, false);
 123 }
 124
 125 void Sequence::add_postprocessor(PostProcessor *pp, bool keep)
 126 {
 127         postproc.push_back(pp);
 128         if(keep)
 129                 postproc.back().keep();
 130         try
 131         {
 132                 create_targets(0);
 133         }
 134         catch(...)
 135         {
 136                 postproc.pop_back();
 137                 throw;
 138         }
 139 }
 140
 141 void Sequence::setup_frame(Renderer &renderer)
 142 {
 143         for(vector<Step>::const_iterator i=steps.begin(); i!=steps.end(); ++i)
 144                 if(Renderable *renderable = i->get_renderable())
 145                         renderable->setup_frame(renderer);
 146 }
 147
 148 void Sequence::finish_frame()
 149 {
 150         for(vector<Step>::const_iterator i=steps.begin(); i!=steps.end(); ++i)
 151                 if(Renderable *renderable = i->get_renderable())
 152                         renderable->finish_frame();
 153 }
 154
 155 void Sequence::render(Renderer &renderer, Tag tag) const
 156 {
 157         if(tag.id)
 158                 return;
 159
 160         const Framebuffer *out_fbo = Framebuffer::current();
 161         // These are no-ops but will ensure the related state gets restored
 162         BindRestore restore_fbo(out_fbo);
 163         BindRestore restore_depth_test(DepthTest::current());
 164         BindRestore restore_blend(Blend::current());
 165
 166         if(target[0])
 167         {
 168                 Framebuffer &fbo = (samples ? target_ms : target[0])->get_framebuffer();
 169                 fbo.bind();
 170                 fbo.clear();
 171         }
 172
 173         for(vector<Step>::const_iterator i=steps.begin(); i!=steps.end(); ++i)
 174         {
 175                 if(const DepthTest *dt = i->get_depth_test())
 176                         dt->bind();
 177                 else
 178                         DepthTest::unbind();
 179
 180                 if(const Blend *b = i->get_blend())
 181                         b->bind();
 182                 else
 183                         Blend::unbind();
 184
 185                 renderer.set_lighting(i->get_lighting());
 186                 renderer.set_clipping(i->get_clipping());
 187
 188                 if(const Renderable *renderable = i->get_renderable())
 189                         renderer.render(*renderable, i->get_tag());
 190         }
 191
 192         if(target[0])
 193         {
 194                 DepthTest::unbind();
 195                 Blend::unbind();
 196
 197                 if(samples)
 198                         target[0]->blit_from(*target_ms);
 199
 200                 for(unsigned i=0; i<postproc.size(); ++i)
 201                 {
 202                         unsigned j = i%2;
 203                         if(i+1<postproc.size())
 204                                 target[1-j]->get_framebuffer().bind();
 205                         else
 206                                 out_fbo->bind();
 207                         const Texture2D &color = target[j]->get_target_texture(RENDER_COLOR);
 208                         const Texture2D &depth = target[j]->get_target_texture(RENDER_DEPTH);
 209                         postproc[i]->render(renderer, color, depth);
 210                 }
 211         }
 212 }
 213
 214 void Sequence::create_targets(unsigned recreate)
 215 {
 216         if(recreate>=2)
 217         {
 218                 delete target[0];
 219                 delete target[1];
 220                 target[0] = 0;
 221                 target[1] = 0;
 222         }
 223         if(recreate>=1)
 224         {
 225                 delete target_ms;
 226                 target_ms = 0;
 227         }
 228
 229         PixelFormat color_pf = (hdr ? (alpha ? RGBA16F : RGB16F) : (alpha ? RGBA8 : RGB8));
 230         RenderTargetFormat fmt = (RENDER_COLOR,color_pf, RENDER_DEPTH);
 231         if(!postproc.empty() || samples)
 232         {
 233                 if(!target[0])
 234                         target[0] = new RenderTarget(width, height, fmt);
 235                 if(!target[1] && postproc.size()>1)
 236                         target[1] = new RenderTarget(width, height, fmt);
 237         }
 238
 239         if(!target_ms && samples)
 240                 target_ms = new RenderTarget(width, height, samples, fmt);
 241 }
 242
 243
 244 Sequence::Step::Step(Tag t, Renderable *r):
 245         tag(t),
 246         lighting(0),
 247         depth_test(0),
 248         blend(0),
 249         clipping(0),
 250         renderable(r)
 251 { }
 252
 253 void Sequence::Step::set_lighting(const Lighting *l)
 254 {
 255         lighting = l;
 256 }
 257
 258 void Sequence::Step::set_depth_test(const DepthTest *d)
 259 {
 260         depth_test = d;
 261 }
 262
 263 void Sequence::Step::set_blend(const Blend *b)
 264 {
 265         blend = b;
 266 }
 267
 268 void Sequence::Step::set_clipping(const Clipping *c)
 269 {
 270         clipping =c;
 271 }
 272
 273 } // namespace GL
 274 } // namespace Msp