source/texture.cpp

   1 #include <msp/gl/extensions/arb_direct_state_access.h>
   2 #include <msp/gl/extensions/arb_shadow.h>
   3 #include <msp/gl/extensions/ext_framebuffer_object.h>
   4 #include <msp/gl/extensions/ext_texture3d.h>
   5 #include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
   6 #include <msp/gl/extensions/sgis_generate_mipmap.h>
   7 #include <msp/io/memory.h>
   8 #include <msp/strings/format.h>
   9 #include "error.h"
  10 #include "resourcemanager.h"
  11 #include "resources.h"
  12 #include "texture.h"
  13 #include "texunit.h"
  14
  15 using namespace std;
  16
  17 namespace Msp {
  18 namespace GL {
  19
  20 void operator>>(const LexicalConverter &c, TextureFilter &tf)
  21 {
  22         if(c.get()=="NEAREST")
  23                 tf = NEAREST;
  24         else if(c.get()=="LINEAR")
  25                 tf = LINEAR;
  26         else if(c.get()=="NEAREST_MIPMAP_NEAREST")
  27                 tf = NEAREST_MIPMAP_NEAREST;
  28         else if(c.get()=="NEAREST_MIPMAP_LINEAR")
  29                 tf = NEAREST_MIPMAP_LINEAR;
  30         else if(c.get()=="LINEAR_MIPMAP_NEAREST")
  31                 tf = LINEAR_MIPMAP_NEAREST;
  32         else if(c.get()=="LINEAR_MIPMAP_LINEAR")
  33                 tf = LINEAR_MIPMAP_LINEAR;
  34         else
  35                 throw lexical_error(format("conversion of '%s' to TextureFilter", c.get()));
  36 }
  37
  38
  39 void operator>>(const LexicalConverter &c, TextureWrap &tw)
  40 {
  41         if(c.get()=="REPEAT")
  42                 tw = REPEAT;
  43         else if(c.get()=="CLAMP_TO_EDGE")
  44                 tw = CLAMP_TO_EDGE;
  45         else if(c.get()=="MIRRORED_REPEAT")
  46                 tw = MIRRORED_REPEAT;
  47         else
  48                 throw lexical_error(format("conversion of '%s' to TextureWrap", c.get()));
  49 }
  50
  51
  52 Texture::Texture(GLenum t, ResourceManager *m):
  53         id(0),
  54         target(t),
  55         min_filter(NEAREST_MIPMAP_LINEAR),
  56         mag_filter(LINEAR),
  57         wrap_s(REPEAT),
  58         wrap_t(REPEAT),
  59         wrap_r(REPEAT),
  60         gen_mipmap(false),
  61         compare(false),
  62         cmp_func(LEQUAL),
  63         dirty_params(0)
  64 {
  65         if(m)
  66                 set_manager(m);
  67         else if(ARB_direct_state_access)
  68                 glCreateTextures(target, 1, &id);
  69         else
  70                 glGenTextures(1, &id);
  71 }
  72
  73 Texture::~Texture()
  74 {
  75         while(TexUnit *unit = TexUnit::find_unit(this))
  76                 unbind_from(unit->get_index());
  77
  78         if(id)
  79                 glDeleteTextures(1, &id);
  80 }
  81
  82 DataType Texture::get_alloc_type(PixelFormat fmt)
  83 {
  84         return (get_base_pixelformat(fmt)==DEPTH_COMPONENT ? UNSIGNED_SHORT : UNSIGNED_BYTE);
  85 }
  86
  87 void Texture::update_parameter(int mask) const
  88 {
  89         if(!ARB_direct_state_access && TexUnit::current().get_texture()!=this)
  90         {
  91                 TexUnit *unit = TexUnit::find_unit(this);
  92                 if(!unit)
  93                 {
  94                         dirty_params |= mask;
  95                         return;
  96                 }
  97
  98                 unit->bind();
  99         }
 100
 101         if(mask&MIN_FILTER)
 102                 set_parameter_i(GL_TEXTURE_MIN_FILTER, min_filter);
 103         if(mask&MAG_FILTER)
 104                 set_parameter_i(GL_TEXTURE_MAG_FILTER, mag_filter);
 105         if(mask&MAX_ANISOTROPY)
 106                 set_parameter_f(GL_TEXTURE_MAX_ANISOTROPY_EXT, max_anisotropy);
 107         if(mask&WRAP_S)
 108                 set_parameter_i(GL_TEXTURE_WRAP_S, wrap_s);
 109         if(mask&WRAP_T)
 110                 set_parameter_i(GL_TEXTURE_WRAP_T, wrap_t);
 111         if(mask&WRAP_R)
 112                 set_parameter_i(GL_TEXTURE_WRAP_R, wrap_r);
 113         if(mask&GENERATE_MIPMAP)
 114                 set_parameter_i(GL_GENERATE_MIPMAP, gen_mipmap);
 115         if(mask&COMPARE)
 116                 set_parameter_i(GL_TEXTURE_COMPARE_MODE, (compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE));
 117         if(mask&COMPARE_FUNC)
 118                 set_parameter_i(GL_TEXTURE_COMPARE_FUNC, cmp_func);
 119 }
 120
 121 void Texture::set_parameter_i(GLenum param, int value) const
 122 {
 123         if(ARB_direct_state_access)
 124                 glTextureParameteri(id, param, value);
 125         else
 126                 glTexParameteri(target, param, value);
 127 }
 128
 129 void Texture::set_parameter_f(GLenum param, float value) const
 130 {
 131         if(ARB_direct_state_access)
 132                 glTextureParameterf(id, param, value);
 133         else
 134                 glTexParameterf(target, param, value);
 135 }
 136
 137 void Texture::set_min_filter(TextureFilter f)
 138 {
 139         min_filter = f;
 140         update_parameter(MIN_FILTER);
 141 }
 142
 143 void Texture::set_mag_filter(TextureFilter f)
 144 {
 145         mag_filter = f;
 146         update_parameter(MAG_FILTER);
 147 }
 148
 149 void Texture::set_filter(TextureFilter f)
 150 {
 151         set_min_filter(f);
 152         set_mag_filter(f==NEAREST ? NEAREST : LINEAR);
 153 }
 154
 155 void Texture::set_max_anisotropy(float a)
 156 {
 157         if(a<1.0f)
 158                 throw invalid_argument("Texture::set_max_anisotropy");
 159         else if(a>1.0f)
 160                 static Require _req(EXT_texture_filter_anisotropic);
 161         max_anisotropy = a;
 162         update_parameter(MAX_ANISOTROPY);
 163 }
 164
 165 void Texture::set_wrap(TextureWrap w)
 166 {
 167         set_wrap_s(w);
 168         set_wrap_t(w);
 169         if(EXT_texture3D)
 170                 set_wrap_r(w);
 171 }
 172
 173 void Texture::set_wrap_s(TextureWrap w)
 174 {
 175         wrap_s = w;
 176         update_parameter(WRAP_S);
 177 }
 178
 179 void Texture::set_wrap_t(TextureWrap w)
 180 {
 181         wrap_t = w;
 182         update_parameter(WRAP_T);
 183 }
 184
 185 void Texture::set_wrap_r(TextureWrap w)
 186 {
 187         static Require _req(EXT_texture3D);
 188         wrap_r = w;
 189         update_parameter(WRAP_R);
 190 }
 191
 192 void Texture::set_generate_mipmap(bool gm)
 193 {
 194         if(gm && !EXT_framebuffer_object)
 195                 static Require _req(SGIS_generate_mipmap);
 196         gen_mipmap = gm;
 197         if(!EXT_framebuffer_object)
 198                 update_parameter(GENERATE_MIPMAP);
 199 }
 200
 201 void Texture::auto_generate_mipmap()
 202 {
 203         // glGenerateMipmap is defined here
 204         if(EXT_framebuffer_object)
 205         {
 206                 if(ARB_direct_state_access)
 207                         glGenerateTextureMipmap(id);
 208                 else
 209                         glGenerateMipmap(target);
 210         }
 211 }
 212
 213 void Texture::set_compare_enabled(bool c)
 214 {
 215         if(c)
 216                 static Require _req(ARB_shadow);
 217         compare = c;
 218         update_parameter(COMPARE);
 219 }
 220
 221 void Texture::set_compare_func(Predicate f)
 222 {
 223         static Require _req(ARB_shadow);
 224         cmp_func = f;
 225         update_parameter(COMPARE_FUNC);
 226 }
 227
 228 void Texture::load_image(const string &fn, bool srgb)
 229 {
 230         Graphics::Image img;
 231         img.load_file(fn);
 232
 233         image(img, srgb);
 234 }
 235
 236 void Texture::bind_to(unsigned i) const
 237 {
 238         if(!id)
 239         {
 240                 if(manager)
 241                         manager->resource_used(*this);
 242                 if(!id)
 243                 {
 244                         unbind_from(i);
 245                         return;
 246                 }
 247         }
 248
 249         TexUnit &unit = TexUnit::get_unit(i);
 250         const Texture *old = unit.get_texture();
 251         if(unit.set_texture(this))
 252         {
 253                 if(manager)
 254                         manager->resource_used(*this);
 255
 256                 unit.bind();
 257                 if(unit.supports_legacy())
 258                 {
 259                         if(old && old->target!=target)
 260                                 glDisable(old->target);
 261                         if(!old || old->target!=target)
 262                                 glEnable(target);
 263                 }
 264                 glBindTexture(target, id);
 265
 266                 if(dirty_params)
 267                 {
 268                         update_parameter(dirty_params);
 269                         dirty_params = 0;
 270                 }
 271         }
 272 }
 273
 274 const Texture *Texture::current(unsigned i)
 275 {
 276         return TexUnit::get_unit(i).get_texture();
 277 }
 278
 279 void Texture::unbind_from(unsigned i)
 280 {
 281         TexUnit &unit = TexUnit::get_unit(i);
 282         const Texture *cur = unit.get_texture();
 283         if(unit.set_texture(0))
 284         {
 285                 unit.bind();
 286                 glBindTexture(cur->target, 0);
 287                 if(unit.supports_legacy())
 288                         glDisable(cur->target);
 289         }
 290 }
 291
 292
 293 Texture::Loader::Loader(Texture &t):
 294         DataFile::CollectionObjectLoader<Texture>(t, 0)
 295 {
 296         init();
 297 }
 298
 299 Texture::Loader::Loader(Texture &t, Collection &c):
 300         DataFile::CollectionObjectLoader<Texture>(t, &c)
 301 {
 302         init();
 303 }
 304
 305 void Texture::Loader::init()
 306 {
 307         if(Resources *res = dynamic_cast<Resources *>(coll))
 308                 srgb = res->get_srgb_conversion();
 309         else
 310                 srgb = false;
 311
 312         add("external_image", &Loader::external_image);
 313         add("filter", &Loader::filter);
 314         add("generate_mipmap", &Loader::generate_mipmap);
 315         add("image_data", &Loader::image_data);
 316         add("mag_filter", &Loader::mag_filter);
 317         add("max_anisotropy", &Loader::max_anisotropy);
 318         add("min_filter", &Loader::min_filter);
 319         add("wrap",       &Loader::wrap);
 320         add("wrap_r",     &Loader::wrap_r);
 321         add("wrap_s",     &Loader::wrap_s);
 322         add("wrap_t",     &Loader::wrap_t);
 323 }
 324
 325 void Texture::Loader::external_image(const string &fn)
 326 {
 327         Graphics::Image img;
 328         RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
 329         img.load_io(*io);
 330
 331         obj.image(img, srgb);
 332 }
 333
 334 void Texture::Loader::filter(TextureFilter f)
 335 {
 336         obj.set_filter(f);
 337 }
 338
 339 void Texture::Loader::generate_mipmap(bool gm)
 340 {
 341         obj.set_generate_mipmap(gm);
 342 }
 343
 344 void Texture::Loader::image_data(const string &data)
 345 {
 346         Graphics::Image img;
 347         IO::Memory mem(data.data(), data.size());
 348         img.load_io(mem);
 349
 350         obj.image(img, srgb);
 351 }
 352
 353 void Texture::Loader::mag_filter(TextureFilter f)
 354 {
 355         obj.set_mag_filter(f);
 356 }
 357
 358 void Texture::Loader::max_anisotropy(float a)
 359 {
 360         obj.set_max_anisotropy(a);
 361 }
 362
 363 void Texture::Loader::min_filter(TextureFilter f)
 364 {
 365         obj.set_min_filter(f);
 366 }
 367
 368 void Texture::Loader::wrap(TextureWrap w)
 369 {
 370         obj.set_wrap(w);
 371 }
 372
 373 void Texture::Loader::wrap_r(TextureWrap w)
 374 {
 375         obj.set_wrap_r(w);
 376 }
 377
 378 void Texture::Loader::wrap_s(TextureWrap w)
 379 {
 380         obj.set_wrap_s(w);
 381 }
 382
 383 void Texture::Loader::wrap_t(TextureWrap w)
 384 {
 385         obj.set_wrap_t(w);
 386 }
 387
 388
 389 bool is_mipmapped(TextureFilter filter)
 390 {
 391         return (filter==NEAREST_MIPMAP_NEAREST || filter==NEAREST_MIPMAP_LINEAR ||
 392                 filter==LINEAR_MIPMAP_NEAREST || filter==LINEAR_MIPMAP_LINEAR);
 393 }
 394
 395 } // namespace GL
 396 } // namespace Msp