source/texture.cpp

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