source/renderpass.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <msp/core/refptr.h>
   9 #include <msp/datafile/collection.h>
  10 #include <msp/strings/formatter.h>
  11 #include "material.h"
  12 #include "renderpass.h"
  13 #include "program.h"
  14 #include "programdata.h"
  15 #include "texture.h"
  16 #include "texture2d.h"
  17
  18 using namespace std;
  19
  20 namespace Msp {
  21 namespace GL {
  22
  23 RenderPass::RenderPass():
  24         shprog(0),
  25         shdata(0),
  26         material(0)
  27 { }
  28
  29 RenderPass::RenderPass(const RenderPass &other):
  30         Bindable<RenderPass>(other),
  31         shprog(other.shprog),
  32         shdata(other.shdata ? new ProgramData(*other.shdata) : 0),
  33         material(other.material),
  34         textures(other.textures)
  35 { }
  36
  37 RenderPass::~RenderPass()
  38 {
  39         delete shdata;
  40 }
  41
  42 void RenderPass::set_material(const Material *mat)
  43 {
  44         material = mat;
  45         material.keep();
  46 }
  47
  48 void RenderPass::set_texture(unsigned index, const Texture *tex)
  49 {
  50         for(vector<TextureSlot>::iterator i=textures.begin(); i!=textures.end(); ++i)
  51                 if(i->index==index)
  52                 {
  53                         i->texture = tex;
  54                         i->texture.keep();
  55                         return;
  56                 }
  57
  58         textures.push_back(TextureSlot(index));
  59         textures.back().texture = tex;
  60         textures.back().texture.keep();
  61 }
  62
  63 void RenderPass::bind() const
  64 {
  65         const RenderPass *old = current();
  66         if(!set_current(this))
  67                 return;
  68
  69         if(shprog)
  70         {
  71                 shprog->bind();
  72                 shdata->apply();
  73         }
  74         else if(old && old->shprog)
  75                 GL::Program::unbind();
  76
  77         if(material)
  78                 material->bind();
  79         else if(old && old->material)
  80                 GL::Material::unbind();
  81
  82         unsigned used_tex_units = 0;
  83         for(vector<TextureSlot>::const_iterator i=textures.begin(); i!=textures.end(); ++i)
  84         {
  85                 i->texture->bind_to(i->index);
  86                 used_tex_units |= 1<<i->index;
  87         }
  88         if(old)
  89         {
  90                 for(vector<TextureSlot>::const_iterator i=old->textures.begin(); i!=old->textures.end(); ++i)
  91                         if(!used_tex_units&(1<<i->index))
  92                                 Texture::unbind_from(i->index);
  93         }
  94 }
  95
  96 void RenderPass::unbind()
  97 {
  98         const RenderPass *old = current();
  99         if(!set_current(0))
 100                 return;
 101
 102         if(old->shprog)
 103                 GL::Program::unbind();
 104
 105         if(old->material)
 106                 GL::Material::unbind();
 107
 108         for(unsigned i=old->textures.size(); i--; )
 109                 GL::Texture::unbind_from(i);
 110 }
 111
 112
 113 RenderPass::TextureSlot::TextureSlot(unsigned i):
 114         index(i),
 115         texture(0)
 116 { }
 117
 118
 119 RenderPass::Loader::Loader(RenderPass &p):
 120         DataFile::CollectionObjectLoader<RenderPass>(p, 0)
 121 {
 122         init();
 123 }
 124
 125 RenderPass::Loader::Loader(RenderPass &p, Collection &c):
 126         DataFile::CollectionObjectLoader<RenderPass>(p, &c)
 127 {
 128         init();
 129 }
 130
 131 void RenderPass::Loader::init()
 132 {
 133         allow_pointer_reload = false;
 134
 135         add("shader",   &RenderPass::shprog);
 136         add("material", static_cast<void (Loader::*)()>(&Loader::material));
 137         add("material", static_cast<void (Loader::*)(const string &)>(&Loader::material));
 138         add("texunit",  &Loader::texunit);
 139         add("uniforms", &Loader::uniforms);
 140 }
 141
 142 void RenderPass::Loader::finish()
 143 {
 144         // XXX Make shdata optional
 145         if(obj.shprog && !obj.shdata)
 146                 obj.shdata = new ProgramData;
 147 }
 148
 149 void RenderPass::Loader::material()
 150 {
 151         RefPtr<Material> mat = new Material;
 152         load_sub(*mat);
 153         obj.material = mat;
 154 }
 155
 156 void RenderPass::Loader::material(const string &name)
 157 {
 158         obj.material = get_collection().get<Material>(name);
 159         obj.material.keep();
 160 }
 161
 162 void RenderPass::Loader::texunit(unsigned i)
 163 {
 164         TextureSlot slot(i);
 165         load_sub(slot);
 166         obj.textures.push_back(slot);
 167 }
 168
 169 void RenderPass::Loader::uniforms()
 170 {
 171         if(!obj.shprog)
 172                 throw InvalidState("Can't load uniforms without a shader program");
 173         if(!obj.shdata)
 174                 obj.shdata = new ProgramData;
 175         load_sub(*obj.shdata, *obj.shprog);
 176 }
 177
 178
 179 RenderPass::TextureSlot::Loader::Loader(TextureSlot &s):
 180         DataFile::CollectionObjectLoader<TextureSlot>(s, 0)
 181 {
 182         init();
 183 }
 184
 185 RenderPass::TextureSlot::Loader::Loader(TextureSlot &s, Collection &c):
 186         DataFile::CollectionObjectLoader<TextureSlot>(s, &c)
 187 {
 188         init();
 189 }
 190
 191 void RenderPass::TextureSlot::Loader::init()
 192 {
 193         add("texture",   &Loader::texture);
 194         add("texture2d", &Loader::texture2d);
 195 }
 196
 197 void RenderPass::TextureSlot::Loader::texture(const string &name)
 198 {
 199         obj.texture = get_collection().get<Texture>(name);
 200         obj.texture.keep();
 201 }
 202
 203 void RenderPass::TextureSlot::Loader::texture2d()
 204 {
 205         RefPtr<Texture2D> tex = new Texture2D;
 206         load_sub(*tex);
 207         obj.texture = tex;
 208 }
 209
 210 } // namespace GL
 211 } // namespace Msp