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/arb_texture_swizzle.h>
   4 #include <msp/gl/extensions/ext_framebuffer_object.h>
   5 #include <msp/gl/extensions/ext_texture3d.h>
   6 #include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
   7 #include <msp/io/memory.h>
   8 #include <msp/strings/format.h>
   9 #include "bindable.h"
  10 #include "error.h"
  11 #include "resourcemanager.h"
  12 #include "resources.h"
  13 #include "texture.h"
  14 #include "texunit.h"
  15
  16 using namespace std;
  17
  18 namespace Msp {
  19 namespace GL {
  20
  21 void operator>>(const LexicalConverter &c, TextureFilter &tf)
  22 {
  23         if(c.get()=="NEAREST")
  24                 tf = NEAREST;
  25         else if(c.get()=="LINEAR")
  26                 tf = LINEAR;
  27         else if(c.get()=="NEAREST_MIPMAP_NEAREST")
  28                 tf = NEAREST_MIPMAP_NEAREST;
  29         else if(c.get()=="NEAREST_MIPMAP_LINEAR")
  30                 tf = NEAREST_MIPMAP_LINEAR;
  31         else if(c.get()=="LINEAR_MIPMAP_NEAREST")
  32                 tf = LINEAR_MIPMAP_NEAREST;
  33         else if(c.get()=="LINEAR_MIPMAP_LINEAR")
  34                 tf = LINEAR_MIPMAP_LINEAR;
  35         else
  36                 throw lexical_error(format("conversion of '%s' to TextureFilter", c.get()));
  37 }
  38
  39
  40 void operator>>(const LexicalConverter &c, TextureWrap &tw)
  41 {
  42         if(c.get()=="REPEAT")
  43                 tw = REPEAT;
  44         else if(c.get()=="CLAMP_TO_EDGE")
  45                 tw = CLAMP_TO_EDGE;
  46         else if(c.get()=="MIRRORED_REPEAT")
  47                 tw = MIRRORED_REPEAT;
  48         else
  49                 throw lexical_error(format("conversion of '%s' to TextureWrap", c.get()));
  50 }
  51
  52
  53 int Texture::swizzle_orders[] =
  54 {
  55         GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA,
  56         GL_RED, GL_RED, GL_RED, GL_ONE,
  57         GL_RED, GL_RED, GL_RED, GL_GREEN
  58 };
  59
  60 Texture::Texture(GLenum t, ResourceManager *m):
  61         id(0),
  62         target(t),
  63         ifmt(RGB),
  64         min_filter(NEAREST_MIPMAP_LINEAR),
  65         mag_filter(LINEAR),
  66         mipmap_levels(0),
  67         max_anisotropy(1.0f),
  68         wrap_s(REPEAT),
  69         wrap_t(REPEAT),
  70         wrap_r(REPEAT),
  71         auto_gen_mipmap(false),
  72         compare(false),
  73         cmp_func(LEQUAL),
  74         dirty_params(0)
  75 {
  76         if(m)
  77                 set_manager(m);
  78         else if(ARB_direct_state_access)
  79                 glCreateTextures(target, 1, &id);
  80         else
  81                 glGenTextures(1, &id);
  82 }
  83
  84 Texture::~Texture()
  85 {
  86         while(TexUnit *unit = TexUnit::find_unit(this))
  87                 unbind_from(unit->get_index());
  88
  89         if(id)
  90                 glDeleteTextures(1, &id);
  91 }
  92
  93 DataType Texture::get_alloc_type(PixelFormat fmt)
  94 {
  95         return (get_base_pixelformat(fmt)==DEPTH_COMPONENT ? UNSIGNED_SHORT : UNSIGNED_BYTE);
  96 }
  97
  98 void Texture::set_internal_format(PixelFormat fmt)
  99 {
 100         if(!get_component_size(fmt) && OES_required_internalformat)
 101                 fmt = get_default_sized_pixelformat(fmt);
 102
 103         FormatSwizzle swiz = NO_SWIZZLE;
 104         if(ARB_texture_rg && ARB_texture_swizzle)
 105         {
 106                 if(fmt==LUMINANCE8)
 107                 {
 108                         fmt = R8;
 109                         swiz = R_TO_LUMINANCE;
 110                 }
 111                 else if(fmt==LUMINANCE8_ALPHA8)
 112                 {
 113                         fmt = RG8;
 114                         swiz = RG_TO_LUMINANCE_ALPHA;
 115                 }
 116         }
 117
 118         require_pixelformat(fmt);
 119         ifmt = fmt;
 120         swizzle = swiz;
 121         if(swizzle)
 122                 update_parameter(FORMAT_SWIZZLE);
 123 }
 124
 125 PixelFormat Texture::get_upload_format(PixelFormat fmt) const
 126 {
 127         if(fmt==LUMINANCE || fmt==LUMINANCE_ALPHA)
 128                 return get_base_pixelformat(ifmt);
 129         else
 130                 return fmt;
 131 }
 132
 133 void Texture::update_parameter(int mask) const
 134 {
 135         if(!ARB_direct_state_access && TexUnit::current().get_texture()!=this)
 136         {
 137                 TexUnit *unit = TexUnit::find_unit(this);
 138                 if(!unit)
 139                 {
 140                         dirty_params |= mask;
 141                         return;
 142                 }
 143
 144                 unit->bind();
 145         }
 146
 147         if(mask&MIN_FILTER)
 148                 set_parameter_i(GL_TEXTURE_MIN_FILTER, min_filter);
 149         if(mask&MAG_FILTER)
 150                 set_parameter_i(GL_TEXTURE_MAG_FILTER, mag_filter);
 151         if(mask&MAX_ANISOTROPY)
 152                 set_parameter_f(GL_TEXTURE_MAX_ANISOTROPY_EXT, max_anisotropy);
 153         if(mask&WRAP_S)
 154                 set_parameter_i(GL_TEXTURE_WRAP_S, wrap_s);
 155         if(mask&WRAP_T)
 156                 set_parameter_i(GL_TEXTURE_WRAP_T, wrap_t);
 157         if(mask&WRAP_R)
 158                 set_parameter_i(GL_TEXTURE_WRAP_R, wrap_r);
 159         if(mask&COMPARE)
 160                 set_parameter_i(GL_TEXTURE_COMPARE_MODE, (compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE));
 161         if(mask&COMPARE_FUNC)
 162                 set_parameter_i(GL_TEXTURE_COMPARE_FUNC, cmp_func);
 163         if(mask&FORMAT_SWIZZLE)
 164         {
 165                 if(get_gl_api()==OPENGL_ES2)
 166                 {
 167                         set_parameter_i(GL_TEXTURE_SWIZZLE_R, swizzle_orders[swizzle*4]);
 168                         set_parameter_i(GL_TEXTURE_SWIZZLE_G, swizzle_orders[swizzle*4+1]);
 169                         set_parameter_i(GL_TEXTURE_SWIZZLE_B, swizzle_orders[swizzle*4+2]);
 170                         set_parameter_i(GL_TEXTURE_SWIZZLE_A, swizzle_orders[swizzle*4+3]);
 171                 }
 172                 else
 173                 {
 174                         if(ARB_direct_state_access)
 175                                 glTextureParameteriv(id, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
 176                         else
 177                                 glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
 178                 }
 179         }
 180         if(mask&MIPMAP_LEVELS)
 181                 set_parameter_i(GL_TEXTURE_MAX_LEVEL, (mipmap_levels ? mipmap_levels-1 : 1000));
 182 }
 183
 184 void Texture::set_parameter_i(GLenum param, int value) const
 185 {
 186         if(ARB_direct_state_access)
 187                 glTextureParameteri(id, param, value);
 188         else
 189                 glTexParameteri(target, param, value);
 190 }
 191
 192 void Texture::set_parameter_f(GLenum param, float value) const
 193 {
 194         if(ARB_direct_state_access)
 195                 glTextureParameterf(id, param, value);
 196         else
 197                 glTexParameterf(target, param, value);
 198 }
 199
 200 void Texture::set_min_filter(TextureFilter f)
 201 {
 202         min_filter = f;
 203         update_parameter(MIN_FILTER);
 204 }
 205
 206 void Texture::set_mag_filter(TextureFilter f)
 207 {
 208         mag_filter = f;
 209         update_parameter(MAG_FILTER);
 210 }
 211
 212 void Texture::set_filter(TextureFilter f)
 213 {
 214         set_min_filter(f);
 215         set_mag_filter(f==NEAREST ? NEAREST : LINEAR);
 216 }
 217
 218 void Texture::set_mipmap_levels(unsigned l)
 219 {
 220         mipmap_levels = l;
 221         update_parameter(MIPMAP_LEVELS);
 222 }
 223
 224 void Texture::set_max_anisotropy(float a)
 225 {
 226         if(a<1.0f)
 227                 throw invalid_argument("Texture::set_max_anisotropy");
 228         else if(a>1.0f)
 229                 static Require _req(EXT_texture_filter_anisotropic);
 230         max_anisotropy = a;
 231         if(EXT_texture_filter_anisotropic)
 232                 update_parameter(MAX_ANISOTROPY);
 233 }
 234
 235 void Texture::set_wrap(TextureWrap w)
 236 {
 237         set_wrap_s(w);
 238         set_wrap_t(w);
 239         if(EXT_texture3D)
 240                 set_wrap_r(w);
 241 }
 242
 243 void Texture::set_wrap_s(TextureWrap w)
 244 {
 245         wrap_s = w;
 246         update_parameter(WRAP_S);
 247 }
 248
 249 void Texture::set_wrap_t(TextureWrap w)
 250 {
 251         wrap_t = w;
 252         update_parameter(WRAP_T);
 253 }
 254
 255 void Texture::set_wrap_r(TextureWrap w)
 256 {
 257         static Require _req(EXT_texture3D);
 258         wrap_r = w;
 259         update_parameter(WRAP_R);
 260 }
 261
 262 bool Texture::can_generate_mipmap()
 263 {
 264         return EXT_framebuffer_object;
 265 }
 266
 267 void Texture::generate_mipmap()
 268 {
 269         // glGenerateMipmap is defined here
 270         static Require _req(EXT_framebuffer_object);
 271
 272         if(ARB_direct_state_access)
 273                 glGenerateTextureMipmap(id);
 274         else
 275         {
 276                 BindRestore _bind(this);
 277                 glGenerateMipmap(target);
 278         }
 279 }
 280
 281 void Texture::set_auto_generate_mipmap(bool gm)
 282 {
 283         if(gm)
 284                 static Require _req(EXT_framebuffer_object);
 285
 286         auto_gen_mipmap = gm;
 287 }
 288
 289 void Texture::set_compare_enabled(bool c)
 290 {
 291         if(c)
 292                 static Require _req(ARB_shadow);
 293         compare = c;
 294         update_parameter(COMPARE);
 295 }
 296
 297 void Texture::set_compare_func(Predicate f)
 298 {
 299         static Require _req(ARB_shadow);
 300         cmp_func = f;
 301         update_parameter(COMPARE_FUNC);
 302 }
 303
 304 void Texture::load_image(const string &fn, bool srgb)
 305 {
 306         Graphics::Image img;
 307         img.load_file(fn);
 308
 309         image(img, srgb);
 310 }
 311
 312 void Texture::bind_to(unsigned i) const
 313 {
 314         if(!id)
 315         {
 316                 if(manager)
 317                         manager->resource_used(*this);
 318                 if(!id)
 319                 {
 320                         unbind_from(i);
 321                         return;
 322                 }
 323         }
 324
 325         TexUnit &unit = TexUnit::get_unit(i);
 326         if(unit.set_texture(this))
 327         {
 328                 if(manager)
 329                         manager->resource_used(*this);
 330
 331                 if(ARB_direct_state_access)
 332                         glBindTextureUnit(i, id);
 333                 else
 334                 {
 335                         unit.bind();
 336                         glBindTexture(target, id);
 337                 }
 338
 339                 if(dirty_params)
 340                 {
 341                         update_parameter(dirty_params);
 342                         dirty_params = 0;
 343                 }
 344         }
 345 }
 346
 347 const Texture *Texture::current(unsigned i)
 348 {
 349         return TexUnit::get_unit(i).get_texture();
 350 }
 351
 352 void Texture::unbind_from(unsigned i)
 353 {
 354         TexUnit &unit = TexUnit::get_unit(i);
 355         const Texture *cur = unit.get_texture();
 356         if(unit.set_texture(0))
 357         {
 358                 if(ARB_direct_state_access)
 359                         glBindTextureUnit(i, 0);
 360                 else
 361                 {
 362                         unit.bind();
 363                         glBindTexture(cur->target, 0);
 364                 }
 365         }
 366 }
 367
 368
 369 Texture::Loader::Loader(Texture &t):
 370         DataFile::CollectionObjectLoader<Texture>(t, 0)
 371 {
 372         init();
 373 }
 374
 375 Texture::Loader::Loader(Texture &t, Collection &c):
 376         DataFile::CollectionObjectLoader<Texture>(t, &c)
 377 {
 378         init();
 379 }
 380
 381 void Texture::Loader::init()
 382 {
 383         if(Resources *res = dynamic_cast<Resources *>(coll))
 384                 srgb = res->get_srgb_conversion();
 385         else
 386                 srgb = false;
 387
 388         add("external_image", &Loader::external_image);
 389         add("filter", &Loader::filter);
 390         add("generate_mipmap", &Loader::generate_mipmap);
 391         add("image_data", &Loader::image_data);
 392         add("mag_filter", &Loader::mag_filter);
 393         add("max_anisotropy", &Loader::max_anisotropy);
 394         add("min_filter", &Loader::min_filter);
 395         add("mipmap_levels", &Loader::mipmap_levels);
 396         add("wrap",       &Loader::wrap);
 397         add("wrap_r",     &Loader::wrap_r);
 398         add("wrap_s",     &Loader::wrap_s);
 399         add("wrap_t",     &Loader::wrap_t);
 400 }
 401
 402 void Texture::Loader::external_image(const string &fn)
 403 {
 404         Graphics::Image img;
 405         RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
 406         if(!io)
 407                 throw IO::file_not_found(fn);
 408         img.load_io(*io);
 409
 410         obj.image(img, srgb);
 411 }
 412
 413 void Texture::Loader::filter(TextureFilter f)
 414 {
 415         obj.set_filter(f);
 416 }
 417
 418 void Texture::Loader::generate_mipmap(bool gm)
 419 {
 420         obj.set_auto_generate_mipmap(gm);
 421 }
 422
 423 void Texture::Loader::image_data(const string &data)
 424 {
 425         Graphics::Image img;
 426         IO::Memory mem(data.data(), data.size());
 427         img.load_io(mem);
 428
 429         obj.image(img, srgb);
 430 }
 431
 432 void Texture::Loader::mag_filter(TextureFilter f)
 433 {
 434         obj.set_mag_filter(f);
 435 }
 436
 437 void Texture::Loader::max_anisotropy(float a)
 438 {
 439         obj.set_max_anisotropy(a);
 440 }
 441
 442 void Texture::Loader::min_filter(TextureFilter f)
 443 {
 444         obj.set_min_filter(f);
 445 }
 446
 447 void Texture::Loader::mipmap_levels(unsigned l)
 448 {
 449         obj.set_mipmap_levels(l);
 450 }
 451
 452 void Texture::Loader::wrap(TextureWrap w)
 453 {
 454         obj.set_wrap(w);
 455 }
 456
 457 void Texture::Loader::wrap_r(TextureWrap w)
 458 {
 459         obj.set_wrap_r(w);
 460 }
 461
 462 void Texture::Loader::wrap_s(TextureWrap w)
 463 {
 464         obj.set_wrap_s(w);
 465 }
 466
 467 void Texture::Loader::wrap_t(TextureWrap w)
 468 {
 469         obj.set_wrap_t(w);
 470 }
 471
 472
 473 bool is_mipmapped(TextureFilter filter)
 474 {
 475         return (filter==NEAREST_MIPMAP_NEAREST || filter==NEAREST_MIPMAP_LINEAR ||
 476                 filter==LINEAR_MIPMAP_NEAREST || filter==LINEAR_MIPMAP_LINEAR);
 477 }
 478
 479 } // namespace GL
 480 } // namespace Msp