source/texture.cpp

   1 #include <msp/gl/extensions/arb_shadow.h>
   2 #include <msp/gl/extensions/ext_framebuffer_object.h>
   3 #include <msp/gl/extensions/ext_texture3d.h>
   4 #include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
   5 #include <msp/gl/extensions/sgis_generate_mipmap.h>
   6 #include <msp/strings/format.h>
   7 #include "error.h"
   8 #include "resourcemanager.h"
   9 #include "resources.h"
  10 #include "texture.h"
  11 #include "texunit.h"
  12
  13 using namespace std;
  14
  15 namespace Msp {
  16 namespace GL {
  17
  18 void operator>>(const LexicalConverter &c, TextureFilter &tf)
  19 {
  20         if(c.get()=="NEAREST")
  21                 tf = NEAREST;
  22         else if(c.get()=="LINEAR")
  23                 tf = LINEAR;
  24         else if(c.get()=="NEAREST_MIPMAP_NEAREST")
  25                 tf = NEAREST_MIPMAP_NEAREST;
  26         else if(c.get()=="NEAREST_MIPMAP_LINEAR")
  27                 tf = NEAREST_MIPMAP_LINEAR;
  28         else if(c.get()=="LINEAR_MIPMAP_NEAREST")
  29                 tf = LINEAR_MIPMAP_NEAREST;
  30         else if(c.get()=="LINEAR_MIPMAP_LINEAR")
  31                 tf = LINEAR_MIPMAP_LINEAR;
  32         else
  33                 throw lexical_error(format("conversion of '%s' to TextureFilter", c.get()));
  34 }
  35
  36
  37 void operator>>(const LexicalConverter &c, TextureWrap &tw)
  38 {
  39         if(c.get()=="REPEAT")
  40                 tw = REPEAT;
  41         else if(c.get()=="CLAMP_TO_EDGE")
  42                 tw = CLAMP_TO_EDGE;
  43         else if(c.get()=="MIRRORED_REPEAT")
  44                 tw = MIRRORED_REPEAT;
  45         else
  46                 throw lexical_error(format("conversion of '%s' to TextureWrap", c.get()));
  47 }
  48
  49
  50 Texture::Texture(GLenum t, ResourceManager *m):
  51         id(0),
  52         target(t),
  53         min_filter(NEAREST_MIPMAP_LINEAR),
  54         mag_filter(LINEAR),
  55         wrap_s(REPEAT),
  56         wrap_t(REPEAT),
  57         wrap_r(REPEAT),
  58         gen_mipmap(false),
  59         compare(false),
  60         cmp_func(LEQUAL),
  61         dirty_params(0)
  62 {
  63         if(m)
  64                 set_manager(m);
  65         else
  66                 glGenTextures(1, &id);
  67 }
  68
  69 Texture::~Texture()
  70 {
  71         while(TexUnit *unit = TexUnit::find_unit(this))
  72                 unbind_from(unit->get_index());
  73
  74         if(id)
  75                 glDeleteTextures(1, &id);
  76 }
  77
  78 void Texture::update_parameter(int mask) const
  79 {
  80         if(TexUnit::current().get_texture()!=this)
  81         {
  82                 TexUnit *unit = TexUnit::find_unit(this);
  83                 if(!unit)
  84                 {
  85                         dirty_params |= mask;
  86                         return;
  87                 }
  88
  89                 unit->bind();
  90         }
  91
  92         if(mask&MIN_FILTER)
  93                 glTexParameteri(target, GL_TEXTURE_MIN_FILTER, min_filter);
  94         if(mask&MAG_FILTER)
  95                 glTexParameteri(target, GL_TEXTURE_MAG_FILTER, mag_filter);
  96         if(mask&MAX_ANISOTROPY)
  97                 glTexParameteri(target, GL_TEXTURE_MAX_ANISOTROPY_EXT, max_anisotropy);
  98         if(mask&WRAP_S)
  99                 glTexParameteri(target, GL_TEXTURE_WRAP_S, wrap_s);
 100         if(mask&WRAP_T)
 101                 glTexParameteri(target, GL_TEXTURE_WRAP_T, wrap_t);
 102         if(mask&WRAP_R)
 103                 glTexParameteri(target, GL_TEXTURE_WRAP_R, wrap_r);
 104         if(mask&GENERATE_MIPMAP)
 105                 glTexParameteri(target, GL_GENERATE_MIPMAP, gen_mipmap);
 106         if(mask&COMPARE)
 107                 glTexParameteri(target, GL_TEXTURE_COMPARE_MODE, (compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE));
 108         if(mask&COMPARE_FUNC)
 109                 glTexParameteri(target, GL_TEXTURE_COMPARE_FUNC, cmp_func);
 110 }
 111
 112 void Texture::set_min_filter(TextureFilter f)
 113 {
 114         min_filter = f;
 115         update_parameter(MIN_FILTER);
 116 }
 117
 118 void Texture::set_mag_filter(TextureFilter f)
 119 {
 120         mag_filter = f;
 121         update_parameter(MAG_FILTER);
 122 }
 123
 124 void Texture::set_filter(TextureFilter f)
 125 {
 126         set_min_filter(f);
 127         set_mag_filter(f==NEAREST ? NEAREST : LINEAR);
 128 }
 129
 130 void Texture::set_max_anisotropy(float a)
 131 {
 132         if(a<1.0f)
 133                 throw invalid_argument("Texture::set_max_anisotropy");
 134         else if(a>1.0f)
 135                 static Require _req(EXT_texture_filter_anisotropic);
 136         max_anisotropy = a;
 137         update_parameter(MAX_ANISOTROPY);
 138 }
 139
 140 void Texture::set_wrap(TextureWrap w)
 141 {
 142         set_wrap_s(w);
 143         set_wrap_t(w);
 144         if(EXT_texture3D)
 145                 set_wrap_r(w);
 146 }
 147
 148 void Texture::set_wrap_s(TextureWrap w)
 149 {
 150         wrap_s = w;
 151         update_parameter(WRAP_S);
 152 }
 153
 154 void Texture::set_wrap_t(TextureWrap w)
 155 {
 156         wrap_t = w;
 157         update_parameter(WRAP_T);
 158 }
 159
 160 void Texture::set_wrap_r(TextureWrap w)
 161 {
 162         static Require _req(EXT_texture3D);
 163         wrap_r = w;
 164         update_parameter(WRAP_R);
 165 }
 166
 167 void Texture::set_generate_mipmap(bool gm)
 168 {
 169         if(gm)
 170                 static Require _req(SGIS_generate_mipmap);
 171         gen_mipmap = gm;
 172         if(get_gl_api()!=OPENGL_ES2)
 173                 update_parameter(GENERATE_MIPMAP);
 174 }
 175
 176 void Texture::auto_generate_mipmap()
 177 {
 178         if(get_gl_api()==OPENGL_ES2)
 179         {
 180                 // glGenerateMipmap is defined here
 181                 static Require _req(EXT_framebuffer_object);
 182                 glGenerateMipmap(target);
 183         }
 184 }
 185
 186 void Texture::set_compare_enabled(bool c)
 187 {
 188         if(c)
 189                 static Require _req(ARB_shadow);
 190         compare = c;
 191         update_parameter(COMPARE);
 192 }
 193
 194 void Texture::set_compare_func(Predicate f)
 195 {
 196         static Require _req(ARB_shadow);
 197         cmp_func = f;
 198         update_parameter(COMPARE_FUNC);
 199 }
 200
 201 void Texture::bind_to(unsigned i) const
 202 {
 203         if(!id)
 204         {
 205                 if(manager)
 206                         manager->resource_used(*this);
 207                 if(!id)
 208                 {
 209                         unbind_from(i);
 210                         return;
 211                 }
 212         }
 213
 214         TexUnit &unit = TexUnit::get_unit(i);
 215         const Texture *old = unit.get_texture();
 216         if(unit.set_texture(this))
 217         {
 218                 if(manager)
 219                         manager->resource_used(*this);
 220
 221                 unit.bind();
 222                 if(unit.supports_legacy())
 223                 {
 224                         if(old && old->target!=target)
 225                                 glDisable(old->target);
 226                         if(!old || old->target!=target)
 227                                 glEnable(target);
 228                 }
 229                 glBindTexture(target, id);
 230
 231                 if(dirty_params)
 232                 {
 233                         update_parameter(dirty_params);
 234                         dirty_params = 0;
 235                 }
 236         }
 237 }
 238
 239 const Texture *Texture::current(unsigned i)
 240 {
 241         return TexUnit::get_unit(i).get_texture();
 242 }
 243
 244 void Texture::unbind_from(unsigned i)
 245 {
 246         TexUnit &unit = TexUnit::get_unit(i);
 247         const Texture *cur = unit.get_texture();
 248         if(unit.set_texture(0))
 249         {
 250                 unit.bind();
 251                 glBindTexture(cur->target, 0);
 252                 if(unit.supports_legacy())
 253                         glDisable(cur->target);
 254         }
 255 }
 256
 257
 258 Texture::Loader::Loader(Texture &t):
 259         DataFile::CollectionObjectLoader<Texture>(t, 0)
 260 {
 261         init();
 262 }
 263
 264 Texture::Loader::Loader(Texture &t, Collection &c):
 265         DataFile::CollectionObjectLoader<Texture>(t, &c)
 266 {
 267         init();
 268 }
 269
 270 void Texture::Loader::init()
 271 {
 272         if(Resources *res = dynamic_cast<Resources *>(coll))
 273                 srgb = res->get_srgb_conversion();
 274         else
 275                 srgb = false;
 276
 277         add("filter", &Loader::filter);
 278         add("max_anisotropy", &Loader::max_anisotropy);
 279         add("generate_mipmap", &Loader::generate_mipmap);
 280         add("mag_filter", &Loader::mag_filter);
 281         add("min_filter", &Loader::min_filter);
 282         add("wrap",       &Loader::wrap);
 283         add("wrap_r",     &Loader::wrap_r);
 284         add("wrap_s",     &Loader::wrap_s);
 285         add("wrap_t",     &Loader::wrap_t);
 286 }
 287
 288 void Texture::Loader::filter(TextureFilter f)
 289 {
 290         obj.set_filter(f);
 291 }
 292
 293 void Texture::Loader::generate_mipmap(bool gm)
 294 {
 295         obj.set_generate_mipmap(gm);
 296 }
 297
 298 void Texture::Loader::mag_filter(TextureFilter f)
 299 {
 300         obj.set_mag_filter(f);
 301 }
 302
 303 void Texture::Loader::max_anisotropy(float a)
 304 {
 305         obj.set_max_anisotropy(a);
 306 }
 307
 308 void Texture::Loader::min_filter(TextureFilter f)
 309 {
 310         obj.set_min_filter(f);
 311 }
 312
 313 void Texture::Loader::wrap(TextureWrap w)
 314 {
 315         obj.set_wrap(w);
 316 }
 317
 318 void Texture::Loader::wrap_r(TextureWrap w)
 319 {
 320         obj.set_wrap_r(w);
 321 }
 322
 323 void Texture::Loader::wrap_s(TextureWrap w)
 324 {
 325         obj.set_wrap_s(w);
 326 }
 327
 328 void Texture::Loader::wrap_t(TextureWrap w)
 329 {
 330         obj.set_wrap_t(w);
 331 }
 332
 333 } // namespace GL
 334 } // namespace Msp