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