source/renderpass.cpp

   1 #include <msp/datafile/collection.h>
   2 #include <msp/strings/format.h>
   3 #include "error.h"
   4 #include "material.h"
   5 #include "renderpass.h"
   6 #include "program.h"
   7 #include "programdata.h"
   8 #include "renderer.h"
   9 #include "texture.h"
  10 #include "texture2d.h"
  11 #include "texturing.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GL {
  17
  18 RenderPass::RenderPass():
  19         shprog(0),
  20         shdata(0),
  21         material(0),
  22         texturing(0),
  23         back_faces(false)
  24 { }
  25
  26 RenderPass::RenderPass(const RenderPass &other):
  27         shprog(other.shprog),
  28         shdata(other.shdata),
  29         uniform_slots(other.uniform_slots),
  30         material(other.material),
  31         material_slot(other.material_slot),
  32         texturing(other.texturing ? new Texturing(*other.texturing) : 0),
  33         tex_names(other.tex_names),
  34         back_faces(other.back_faces)
  35 { }
  36
  37 RenderPass &RenderPass::operator=(const RenderPass &other)
  38 {
  39         shprog = other.shprog;
  40         shdata = other.shdata;
  41         uniform_slots = other.uniform_slots;
  42         material = other.material;
  43         material_slot = other.material_slot;
  44         texturing = other.texturing ? new Texturing(*other.texturing) : 0;
  45         tex_names = other.tex_names;
  46         back_faces = other.back_faces;
  47         return *this;
  48 }
  49
  50 RenderPass::~RenderPass()
  51 {
  52         delete texturing;
  53 }
  54
  55 void RenderPass::ensure_private_shader_data()
  56 {
  57         if(!shprog)
  58                 throw invalid_operation("RenderPass::ensure_private_shader_data");
  59
  60         if(!shdata)
  61                 shdata = new ProgramData(shprog);
  62         else if(shdata.refcount() > 1)
  63                 shdata = new ProgramData(*shdata);
  64 }
  65
  66 void RenderPass::set_shader_program(const Program *prog, const ProgramData *data)
  67 {
  68         shprog = prog;
  69         shdata = (data ? new ProgramData(*data) : 0);
  70 }
  71
  72 const string &RenderPass::get_slotted_uniform_name(const string &slot) const
  73 {
  74         map<string, string>::const_iterator i = uniform_slots.find(slot);
  75         if(i==uniform_slots.end())
  76         {
  77                 static string empty;
  78                 return empty;
  79         }
  80         return i->second;
  81 }
  82
  83 void RenderPass::set_material(const Material *mat)
  84 {
  85         material = mat;
  86         material.keep();
  87 }
  88
  89 void RenderPass::set_texture(unsigned index, const Texture *tex)
  90 {
  91         if(!texturing)
  92                 texturing = new Texturing;
  93
  94         texturing->attach(index, *tex);
  95 }
  96
  97 int RenderPass::get_texture_index(const string &n) const
  98 {
  99         map<string, unsigned>::const_iterator i = tex_names.find(n);
 100         if(i==tex_names.end())
 101                 return -1;
 102         return i->second;
 103 }
 104
 105 void RenderPass::apply(Renderer &renderer) const
 106 {
 107         renderer.set_texturing(texturing);
 108         renderer.set_material(material.get());
 109         renderer.set_shader_program(shprog, shdata.get());
 110         renderer.set_reverse_winding(back_faces);
 111 }
 112
 113
 114 RenderPass::Loader::Loader(RenderPass &p):
 115         DataFile::CollectionObjectLoader<RenderPass>(p, 0)
 116 {
 117         init();
 118 }
 119
 120 RenderPass::Loader::Loader(RenderPass &p, Collection &c):
 121         DataFile::CollectionObjectLoader<RenderPass>(p, &c)
 122 {
 123         init();
 124 }
 125
 126 void RenderPass::Loader::init()
 127 {
 128         add("shader",   &RenderPass::shprog);
 129         add("material", &Loader::material_inline);
 130         add("material", &Loader::material);
 131         add("material_slot", &RenderPass::material_slot);
 132         add("back_faces",&RenderPass::back_faces);
 133         add("texunit",  &Loader::texunit);
 134         add("texunit",  &Loader::texunit_named);
 135         add("uniforms", &Loader::uniforms);
 136         add("uniform_slot", &Loader::uniform_slot);
 137 }
 138
 139 void RenderPass::Loader::material_inline()
 140 {
 141         RefPtr<Material> mat = new Material;
 142         if(coll)
 143                 load_sub(*mat, get_collection());
 144         else
 145                 load_sub(*mat);
 146         obj.material = mat;
 147 }
 148
 149 void RenderPass::Loader::material(const string &name)
 150 {
 151         obj.material = &get_collection().get<Material>(name);
 152         obj.material.keep();
 153 }
 154
 155 void RenderPass::Loader::texunit(unsigned i)
 156 {
 157         if(!obj.texturing)
 158                 obj.texturing = new Texturing;
 159         TextureLoader ldr(*obj.texturing, i, coll);
 160         load_sub_with(ldr);
 161 }
 162
 163 void RenderPass::Loader::texunit_named(unsigned i, const string &n)
 164 {
 165         texunit(i);
 166         obj.tex_names[n] = i;
 167         obj.ensure_private_shader_data();
 168         obj.shdata->uniform(n, static_cast<int>(i));
 169 }
 170
 171 void RenderPass::Loader::uniforms()
 172 {
 173         obj.ensure_private_shader_data();
 174         RefPtr<ProgramData> shd = new ProgramData(obj.shprog);
 175         load_sub(*shd);
 176         obj.shdata = shd.release();
 177 }
 178
 179 void RenderPass::Loader::uniform_slot(const string &name)
 180 {
 181         uniform_slot2(name, name);
 182 }
 183
 184 void RenderPass::Loader::uniform_slot2(const string &name, const string &slot)
 185 {
 186         obj.uniform_slots[slot] = name;
 187 }
 188
 189
 190 RenderPass::TextureLoader::TextureLoader(Texturing &t, unsigned i, Collection *c):
 191         DataFile::CollectionObjectLoader<Texturing>(t, c),
 192         index(i)
 193 {
 194         add("texture",   &TextureLoader::texture);
 195         add("texture2d", &TextureLoader::texture2d);
 196 }
 197
 198 void RenderPass::TextureLoader::finish()
 199 {
 200         if(tex)
 201         {
 202                 obj.attach(index, *tex);
 203                 tex.release();
 204         }
 205 }
 206
 207 void RenderPass::TextureLoader::texture(const string &name)
 208 {
 209         tex = &get_collection().get<Texture>(name);
 210         tex.keep();
 211 }
 212
 213 void RenderPass::TextureLoader::texture2d()
 214 {
 215         tex = new Texture2D;
 216         if(coll)
 217                 load_sub(static_cast<Texture2D &>(*tex), get_collection());
 218         else
 219                 load_sub(static_cast<Texture2D &>(*tex));
 220 }
 221
 222 } // namespace GL
 223 } // namespace Msp