source/core/texture.cpp

   1 #include <msp/gl/extensions/arb_direct_state_access.h>
   2 #include <msp/gl/extensions/arb_texture_swizzle.h>
   3 #include <msp/gl/extensions/ext_framebuffer_object.h>
   4 #include <msp/io/memory.h>
   5 #include "bindable.h"
   6 #include "error.h"
   7 #include "resourcemanager.h"
   8 #include "resources.h"
   9 #include "texture.h"
  10 #include "texunit.h"
  11
  12 using namespace std;
  13
  14 namespace Msp {
  15 namespace GL {
  16
  17 int Texture::swizzle_orders[] =
  18 {
  19         GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA,
  20         GL_RED, GL_RED, GL_RED, GL_ONE,
  21         GL_RED, GL_RED, GL_RED, GL_GREEN,
  22         GL_BLUE, GL_GREEN, GL_RED, GL_ALPHA
  23 };
  24
  25 Texture::Texture(GLenum t, ResourceManager *m):
  26         id(0),
  27         target(t),
  28         format(RGB8),
  29         storage_fmt(RGB8),
  30         swizzle(NO_SWIZZLE),
  31         use_srgb_format(false),
  32         auto_gen_mipmap(false),
  33         default_sampler(*this)
  34 {
  35         if(m)
  36                 set_manager(m);
  37         else
  38                 generate_id();
  39 }
  40
  41 Texture::~Texture()
  42 {
  43         while(TexUnit *unit = TexUnit::find_unit(this))
  44                 unbind_from(unit->get_index());
  45
  46         if(id)
  47                 glDeleteTextures(1, &id);
  48 }
  49
  50 void Texture::generate_id()
  51 {
  52         if(id)
  53                 throw invalid_operation("Texture::generate_id");
  54         if(ARB_direct_state_access)
  55                 glCreateTextures(target, 1, &id);
  56         else
  57                 glGenTextures(1, &id);
  58 }
  59
  60 void Texture::set_format(PixelFormat fmt)
  61 {
  62         PixelComponents comp = get_components(fmt);
  63         PixelComponents st_comp = comp;
  64         FormatSwizzle swiz = NO_SWIZZLE;
  65         switch(comp)
  66         {
  67         case LUMINANCE:
  68                 st_comp = RED;
  69                 swiz = R_TO_LUMINANCE;
  70                 break;
  71         case LUMINANCE_ALPHA:
  72                 st_comp = RG;
  73                 swiz = RG_TO_LUMINANCE_ALPHA;
  74                 break;
  75         case BGR:
  76                 st_comp = RGB;
  77                 swiz = RGB_TO_BGR;
  78                 break;
  79         case BGRA:
  80                 st_comp = RGBA;
  81                 swiz = RGB_TO_BGR;
  82                 break;
  83         default:;
  84         }
  85
  86         PixelFormat st_fmt = make_pixelformat(st_comp, get_component_type(fmt), is_srgb(fmt));
  87         require_pixelformat(st_fmt);
  88         if(swiz!=NO_SWIZZLE)
  89                 static Require _req(ARB_texture_swizzle);
  90
  91         format = fmt;
  92         storage_fmt = st_fmt;
  93         swizzle = swiz;
  94 }
  95
  96 void Texture::apply_swizzle()
  97 {
  98         if(swizzle==NO_SWIZZLE)
  99                 return;
 100
 101         if(get_gl_api()==OPENGL_ES2)
 102         {
 103                 set_parameter_i(GL_TEXTURE_SWIZZLE_R, swizzle_orders[swizzle*4]);
 104                 set_parameter_i(GL_TEXTURE_SWIZZLE_G, swizzle_orders[swizzle*4+1]);
 105                 set_parameter_i(GL_TEXTURE_SWIZZLE_B, swizzle_orders[swizzle*4+2]);
 106                 set_parameter_i(GL_TEXTURE_SWIZZLE_A, swizzle_orders[swizzle*4+3]);
 107         }
 108         else
 109         {
 110                 if(ARB_direct_state_access)
 111                         glTextureParameteriv(id, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
 112                 else
 113                         glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
 114         }
 115 }
 116
 117 void Texture::set_parameter_i(GLenum param, int value) const
 118 {
 119         if(ARB_direct_state_access)
 120                 glTextureParameteri(id, param, value);
 121         else
 122                 glTexParameteri(target, param, value);
 123 }
 124
 125 void Texture::set_min_filter(TextureFilter f)
 126 {
 127         default_sampler.set_min_filter(f);
 128 }
 129
 130 void Texture::set_mag_filter(TextureFilter f)
 131 {
 132         default_sampler.set_mag_filter(f);
 133 }
 134
 135 void Texture::set_filter(TextureFilter f)
 136 {
 137         default_sampler.set_filter(f);
 138 }
 139
 140 void Texture::set_max_anisotropy(float a)
 141 {
 142         default_sampler.set_max_anisotropy(a);
 143 }
 144
 145 void Texture::set_wrap(TextureWrap w)
 146 {
 147         default_sampler.set_wrap(w);
 148 }
 149
 150 void Texture::set_wrap_s(TextureWrap w)
 151 {
 152         default_sampler.set_wrap_s(w);
 153 }
 154
 155 void Texture::set_wrap_t(TextureWrap w)
 156 {
 157         default_sampler.set_wrap_t(w);
 158 }
 159
 160 void Texture::set_wrap_r(TextureWrap w)
 161 {
 162         default_sampler.set_wrap_r(w);
 163 }
 164
 165 bool Texture::can_generate_mipmap()
 166 {
 167         return EXT_framebuffer_object;
 168 }
 169
 170 void Texture::generate_mipmap()
 171 {
 172         // glGenerateMipmap is defined here
 173         static Require _req(EXT_framebuffer_object);
 174
 175         if(ARB_direct_state_access)
 176                 glGenerateTextureMipmap(id);
 177         else
 178         {
 179                 BindRestore _bind(this);
 180                 glGenerateMipmap(target);
 181         }
 182 }
 183
 184 void Texture::set_auto_generate_mipmap(bool gm)
 185 {
 186         if(gm)
 187                 static Require _req(EXT_framebuffer_object);
 188
 189         auto_gen_mipmap = gm;
 190 }
 191
 192 void Texture::set_compare_enabled(bool c)
 193 {
 194         if(c)
 195                 default_sampler.set_compare(default_sampler.get_compare_function());
 196         else
 197                 default_sampler.disable_compare();
 198 }
 199
 200 void Texture::set_compare_func(Predicate f)
 201 {
 202         default_sampler.set_compare(f);
 203 }
 204
 205 void Texture::load_image(const string &fn, bool)
 206 {
 207         load_image(fn, 0U);
 208 }
 209
 210 void Texture::load_image(const string &fn, unsigned lv)
 211 {
 212         Graphics::Image img;
 213         img.load_file(fn);
 214
 215         image(img, lv);
 216 }
 217
 218 void Texture::image(const Graphics::Image &img, bool)
 219 {
 220         image(img, 0U);
 221 }
 222
 223 void Texture::bind_to(unsigned i) const
 224 {
 225         if(!id)
 226         {
 227                 if(manager)
 228                         manager->resource_used(*this);
 229                 if(!id)
 230                 {
 231                         unbind_from(i);
 232                         return;
 233                 }
 234         }
 235
 236         TexUnit &unit = TexUnit::get_unit(i);
 237         const Texture *cur = unit.get_texture();
 238         if(unit.set_texture(this))
 239         {
 240                 if(manager)
 241                         manager->resource_used(*this);
 242
 243                 if(ARB_direct_state_access)
 244                         glBindTextureUnit(i, id);
 245                 else
 246                 {
 247                         unit.bind();
 248                         glBindTexture(target, id);
 249                 }
 250
 251                 if(!unit.get_sampler() || unit.get_sampler()==&cur->default_sampler)
 252                         default_sampler.bind_to(i);
 253         }
 254 }
 255
 256 const Texture *Texture::current(unsigned i)
 257 {
 258         return TexUnit::get_unit(i).get_texture();
 259 }
 260
 261 void Texture::unbind_from(unsigned i)
 262 {
 263         TexUnit &unit = TexUnit::get_unit(i);
 264         const Texture *cur = unit.get_texture();
 265         if(unit.set_texture(0))
 266         {
 267                 if(ARB_direct_state_access)
 268                         glBindTextureUnit(i, 0);
 269                 else
 270                 {
 271                         unit.bind();
 272                         glBindTexture(cur->target, 0);
 273                 }
 274
 275                 if(unit.get_sampler()==&cur->default_sampler)
 276                         Sampler::unbind_from(i);
 277         }
 278 }
 279
 280
 281 Texture::Loader::Loader(Texture &t):
 282         DataFile::CollectionObjectLoader<Texture>(t, 0)
 283 {
 284         init();
 285 }
 286
 287 Texture::Loader::Loader(Texture &t, Collection &c):
 288         DataFile::CollectionObjectLoader<Texture>(t, &c)
 289 {
 290         init();
 291 }
 292
 293 void Texture::Loader::init()
 294 {
 295         levels = 0;
 296
 297         add("external_image", &Loader::external_image);
 298         add("external_image_srgb", &Loader::external_image_srgb);
 299         add("filter", &Loader::filter);
 300         add("generate_mipmap", &Loader::generate_mipmap);
 301         add("image_data", &Loader::image_data);
 302         add("mag_filter", &Loader::mag_filter);
 303         add("max_anisotropy", &Loader::max_anisotropy);
 304         add("min_filter", &Loader::min_filter);
 305         add("mipmap_levels", &Loader::mipmap_levels);
 306         add("sampler",    &Loader::sampler);
 307         add("wrap",       &Loader::wrap);
 308         add("wrap_r",     &Loader::wrap_r);
 309         add("wrap_s",     &Loader::wrap_s);
 310         add("wrap_t",     &Loader::wrap_t);
 311 }
 312
 313 unsigned Texture::Loader::get_levels() const
 314 {
 315         return (is_mipmapped(obj.default_sampler.get_min_filter()) ? levels : 1);
 316 }
 317
 318 #pragma GCC diagnostic push
 319 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 320 void Texture::Loader::load_external_image(Graphics::Image &img, const string &fn)
 321 {
 322         RefPtr<IO::Seekable> io = get_collection().open_raw(fn);
 323         if(!io)
 324                 throw IO::file_not_found(fn);
 325         img.load_io(*io);
 326 }
 327
 328 void Texture::Loader::external_image(const string &fn)
 329 {
 330         obj.use_srgb_format = false;
 331         external_image_common(fn);
 332 }
 333
 334 void Texture::Loader::external_image_srgb(const string &fn)
 335 {
 336         obj.use_srgb_format = true;
 337         external_image_common(fn);
 338 }
 339
 340 void Texture::Loader::external_image_common(const string &fn)
 341 {
 342         if(obj.manager)
 343                 obj.manager->set_resource_location(obj, get_collection(), fn);
 344         else
 345         {
 346                 Graphics::Image img;
 347                 load_external_image(img, fn);
 348                 obj.image(img, get_levels());
 349         }
 350 }
 351
 352 void Texture::Loader::filter(TextureFilter f)
 353 {
 354         obj.set_filter(f);
 355 }
 356
 357 void Texture::Loader::generate_mipmap(bool gm)
 358 {
 359         obj.set_auto_generate_mipmap(gm);
 360 }
 361
 362 void Texture::Loader::image_data(const string &data)
 363 {
 364         if(obj.manager)
 365         {
 366                 obj.set_manager(0);
 367                 if(!obj.id)
 368                         obj.generate_id();
 369         }
 370
 371         Graphics::Image img;
 372         IO::Memory mem(data.data(), data.size());
 373         img.load_io(mem);
 374
 375         obj.image(img, get_levels());
 376 }
 377
 378 void Texture::Loader::mag_filter(TextureFilter f)
 379 {
 380         obj.set_mag_filter(f);
 381 }
 382
 383 void Texture::Loader::max_anisotropy(float a)
 384 {
 385         obj.set_max_anisotropy(a);
 386 }
 387
 388 void Texture::Loader::min_filter(TextureFilter f)
 389 {
 390         obj.set_min_filter(f);
 391 }
 392
 393 void Texture::Loader::mipmap_levels(unsigned l)
 394 {
 395         levels = l;
 396 }
 397
 398 void Texture::Loader::sampler()
 399 {
 400         load_sub(obj.default_sampler);
 401 }
 402
 403 void Texture::Loader::wrap(TextureWrap w)
 404 {
 405         obj.set_wrap(w);
 406 }
 407
 408 void Texture::Loader::wrap_r(TextureWrap w)
 409 {
 410         obj.set_wrap_r(w);
 411 }
 412
 413 void Texture::Loader::wrap_s(TextureWrap w)
 414 {
 415         obj.set_wrap_s(w);
 416 }
 417
 418 void Texture::Loader::wrap_t(TextureWrap w)
 419 {
 420         obj.set_wrap_t(w);
 421 }
 422 #pragma GCC diagnostic pop
 423
 424 } // namespace GL
 425 } // namespace Msp