-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#include <msp/strings/formatter.h>
-#include "except.h"
-#include "material.h"
-#include "mesh.h"
-#include "object.h"
-#include "objectinstance.h"
-#include "objectpass.h"
-#include "program.h"
-#include "programdata.h"
-#include "technique.h"
-#include "texture.h"
-#include "texunit.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-Object::Object():
- meshes(1, static_cast<Mesh *>(0)),
- technique(0),
- main_texture(0),
- material(0)
-{ }
-
-Object::~Object()
-{
-}
-
-void Object::render(const Tag &tag) const
-{
- if(!can_render(tag))
- return;
-
- const ObjectPass *pass=get_pass(tag);
- setup_render(pass);
- meshes[0]->draw();
- finish_render(pass);
-}
-
-void Object::render(const ObjectInstance &inst, const Tag &tag) const
-{
- if(!can_render(tag))
- return;
-
- const ObjectPass *pass=get_pass(tag);
- setup_render(pass);
- render_instance(inst, tag);
- meshes[0]->draw();
- finish_render(pass);
-}
-
-bool Object::can_render(const Tag &tag) const
-{
- if(technique)
- return technique->has_pass(tag);
- else
- return tag.id==0;
-}
-
-const ObjectPass *Object::get_pass(const Tag &tag) const
-{
- if(technique)
- return &technique->get_pass(tag);
- else if(tag.id==0)
- return 0;
- throw KeyError("Unknown pass");
-}
-
-void Object::setup_render(const ObjectPass *pass) const
-{
- if(!meshes[0])
- throw InvalidState("Trying to render Object without mesh");
-
- if(pass && pass->shprog)
- {
- pass->shprog->bind();
- pass->shdata->apply();
- for(unsigned i=0; i<textures.size(); ++i)
- {
- TexUnit::activate(i);
- textures[i]->bind();
- }
- }
- else if(main_texture && (!pass || pass->use_textures))
- main_texture->bind();
-
- if(material)
- material->bind();
-}
-
-void Object::finish_render(const ObjectPass *pass) const
-{
- if(pass && pass->shprog)
- {
- Program::unbind();
- for(unsigned i=textures.size(); i--;)
- {
- TexUnit::activate(i);
- Texture::unbind();
- }
- }
- else if(main_texture)
- Texture::unbind();
-
- if(material)
- Material::unbind();
-}
-
-void Object::render_instance(const ObjectInstance &inst, const Tag &tag) const
-{
- inst.setup_render(tag);
- unsigned lod=min<unsigned>(inst.get_level_of_detail(), meshes.size()-1);
- meshes[lod]->draw();
- inst.finish_render(tag);
-}
-
-
-Object::Loader::Loader(Object &o, Collection &c):
- obj(o),
- coll(c)
-{
- add("lod_mesh", &Loader::lod_mesh);
- add("material", &Object::material);
- add("material_inline", &Loader::material_inline);
- add("mesh", &Loader::mesh);
- add("shader_texture", &Loader::shader_texture);
- add("technique", &Loader::technique);
- add("texture", &Loader::texture);
-}
-
-void Object::Loader::finish()
-{
- if(obj.technique && !obj.main_texture)
- obj.main_texture=obj.technique->get_main_texture();
- for(unsigned i=0; i<obj.textures.size(); ++i)
- {
- if(!obj.textures[i])
- {
- obj.textures[i]=obj.technique->get_texture(i);
- if(!obj.textures[i])
- throw Exception("Object does not specify all textures required by Technique");
- }
- }
-}
-
-void Object::Loader::lod_mesh(unsigned l, const string &n)
-{
- obj.meshes.resize(l+1, 0);
- obj.meshes[l]=coll.get<Mesh>(n);
-}
-
-void Object::Loader::material_inline()
-{
- RefPtr<Material> mat=new Material;
- load_sub(*mat);
- coll.add(format("_%p", mat.get()), mat.get());
- obj.material=mat.release();
-}
-
-void Object::Loader::mesh(const string &n)
-{
- obj.meshes[0]=coll.get<Mesh>(n);
-}
-
-void Object::Loader::shader_texture(const string &n)
-{
- if(!obj.technique)
- throw InvalidState("Can't specify shader textures without a Technique");
-
- string::size_type eqsign=n.find('=');
- if(eqsign==string::npos)
- throw InvalidParameterValue("Must specify texture slot name");
-
- obj.textures[obj.technique->get_texture_index(n.substr(0, eqsign))]=coll.get<Texture>(n.substr(eqsign+1));
-}
-
-void Object::Loader::technique(const string &n)
-{
- obj.technique=coll.get<Technique>(n);
- obj.textures.resize(obj.technique->get_n_textures());
- obj.material=obj.technique->get_material();
-}
-
-void Object::Loader::texture(const string &n)
-{
- if(obj.main_texture)
- throw Exception("Only one main texture may be specified");
-
- Texture *tex=coll.get<Texture>(n);
- if(obj.technique)
- obj.textures[obj.technique->get_texture_index("texture")]=tex;
- obj.main_texture=tex;
-}
-
-} // namespace GL
-} // namespace Msp