| 1 | // Created by: Kirill GAVRILOV |
| 2 | // Copyright (c) 2013-2014 OPEN CASCADE SAS |
| 3 | // |
| 4 | // This file is part of Open CASCADE Technology software library. |
| 5 | // |
| 6 | // This library is free software; you can redistribute it and/or modify it under |
| 7 | // the terms of the GNU Lesser General Public License version 2.1 as published |
| 8 | // by the Free Software Foundation, with special exception defined in the file |
| 9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
| 10 | // distribution for complete text of the license and disclaimer of any warranty. |
| 11 | // |
| 12 | // Alternatively, this file may be used under the terms of Open CASCADE |
| 13 | // commercial license or contractual agreement. |
| 14 | |
| 15 | #include <OpenGl_Texture.hxx> |
| 16 | |
| 17 | #include <OpenGl_ArbFBO.hxx> |
| 18 | #include <OpenGl_Context.hxx> |
| 19 | #include <OpenGl_GlCore32.hxx> |
| 20 | #include <OpenGl_Sampler.hxx> |
| 21 | #include <Graphic3d_TextureParams.hxx> |
| 22 | #include <TCollection_ExtendedString.hxx> |
| 23 | #include <Standard_Assert.hxx> |
| 24 | #include <Image_PixMap.hxx> |
| 25 | |
| 26 | IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Texture, OpenGl_NamedResource) |
| 27 | |
| 28 | //! Simple class to reset unpack alignment settings |
| 29 | struct OpenGl_UnpackAlignmentSentry |
| 30 | { |
| 31 | |
| 32 | //! Reset unpack alignment settings to safe values |
| 33 | static void Reset() |
| 34 | { |
| 35 | glPixelStorei (GL_UNPACK_ALIGNMENT, 1); |
| 36 | #if !defined(GL_ES_VERSION_2_0) |
| 37 | glPixelStorei (GL_UNPACK_ROW_LENGTH, 0); |
| 38 | #endif |
| 39 | } |
| 40 | |
| 41 | OpenGl_UnpackAlignmentSentry() {} |
| 42 | |
| 43 | ~OpenGl_UnpackAlignmentSentry() |
| 44 | { |
| 45 | Reset(); |
| 46 | } |
| 47 | |
| 48 | }; |
| 49 | |
| 50 | // ======================================================================= |
| 51 | // function : OpenGl_Texture |
| 52 | // purpose : |
| 53 | // ======================================================================= |
| 54 | OpenGl_Texture::OpenGl_Texture (const TCollection_AsciiString& theResourceId, |
| 55 | const Handle(Graphic3d_TextureParams)& theParams) |
| 56 | : OpenGl_NamedResource (theResourceId), |
| 57 | mySampler (new OpenGl_Sampler (theParams)), |
| 58 | myRevision (0), |
| 59 | myTextureId (NO_TEXTURE), |
| 60 | myTarget (GL_TEXTURE_2D), |
| 61 | mySizeX (0), |
| 62 | mySizeY (0), |
| 63 | mySizeZ (0), |
| 64 | myTextFormat (GL_RGBA), |
| 65 | mySizedFormat(GL_RGBA8), |
| 66 | myNbSamples (1), |
| 67 | myHasMipmaps (Standard_False), |
| 68 | myIsAlpha (false) |
| 69 | { |
| 70 | // |
| 71 | } |
| 72 | |
| 73 | // ======================================================================= |
| 74 | // function : ~OpenGl_Texture |
| 75 | // purpose : |
| 76 | // ======================================================================= |
| 77 | OpenGl_Texture::~OpenGl_Texture() |
| 78 | { |
| 79 | Release (NULL); |
| 80 | } |
| 81 | |
| 82 | // ======================================================================= |
| 83 | // function : Create |
| 84 | // purpose : |
| 85 | // ======================================================================= |
| 86 | bool OpenGl_Texture::Create (const Handle(OpenGl_Context)& theCtx) |
| 87 | { |
| 88 | if (myTextureId != NO_TEXTURE) |
| 89 | { |
| 90 | return true; |
| 91 | } |
| 92 | |
| 93 | theCtx->core11fwd->glGenTextures (1, &myTextureId); |
| 94 | if (myTextureId == NO_TEXTURE) |
| 95 | { |
| 96 | return false; |
| 97 | } |
| 98 | |
| 99 | //mySampler->Create (theCtx); // do not create sampler object by default |
| 100 | return true; |
| 101 | } |
| 102 | |
| 103 | // ======================================================================= |
| 104 | // function : Release |
| 105 | // purpose : |
| 106 | // ======================================================================= |
| 107 | void OpenGl_Texture::Release (OpenGl_Context* theGlCtx) |
| 108 | { |
| 109 | mySampler->Release (theGlCtx); |
| 110 | if (myTextureId == NO_TEXTURE) |
| 111 | { |
| 112 | return; |
| 113 | } |
| 114 | |
| 115 | // application can not handle this case by exception - this is bug in code |
| 116 | Standard_ASSERT_RETURN (theGlCtx != NULL, |
| 117 | "OpenGl_Texture destroyed without GL context! Possible GPU memory leakage...",); |
| 118 | |
| 119 | if (theGlCtx->IsValid()) |
| 120 | { |
| 121 | glDeleteTextures (1, &myTextureId); |
| 122 | } |
| 123 | myTextureId = NO_TEXTURE; |
| 124 | mySizeX = mySizeY = mySizeZ = 0; |
| 125 | } |
| 126 | |
| 127 | // ======================================================================= |
| 128 | // function : applyDefaultSamplerParams |
| 129 | // purpose : |
| 130 | // ======================================================================= |
| 131 | void OpenGl_Texture::applyDefaultSamplerParams (const Handle(OpenGl_Context)& theCtx) |
| 132 | { |
| 133 | OpenGl_Sampler::applySamplerParams (theCtx, mySampler->Parameters(), NULL, myTarget, myHasMipmaps); |
| 134 | if (mySampler->IsValid() && !mySampler->IsImmutable()) |
| 135 | { |
| 136 | OpenGl_Sampler::applySamplerParams (theCtx, mySampler->Parameters(), mySampler.get(), myTarget, myHasMipmaps); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | // ======================================================================= |
| 141 | // function : Bind |
| 142 | // purpose : |
| 143 | // ======================================================================= |
| 144 | void OpenGl_Texture::Bind (const Handle(OpenGl_Context)& theCtx, |
| 145 | const Graphic3d_TextureUnit theTextureUnit) const |
| 146 | { |
| 147 | if (theCtx->core15fwd != NULL) |
| 148 | { |
| 149 | theCtx->core15fwd->glActiveTexture (GL_TEXTURE0 + theTextureUnit); |
| 150 | } |
| 151 | mySampler->Bind (theCtx, theTextureUnit); |
| 152 | glBindTexture (myTarget, myTextureId); |
| 153 | } |
| 154 | |
| 155 | // ======================================================================= |
| 156 | // function : Unbind |
| 157 | // purpose : |
| 158 | // ======================================================================= |
| 159 | void OpenGl_Texture::Unbind (const Handle(OpenGl_Context)& theCtx, |
| 160 | const Graphic3d_TextureUnit theTextureUnit) const |
| 161 | { |
| 162 | if (theCtx->core15fwd != NULL) |
| 163 | { |
| 164 | theCtx->core15fwd->glActiveTexture (GL_TEXTURE0 + theTextureUnit); |
| 165 | } |
| 166 | mySampler->Unbind (theCtx, theTextureUnit); |
| 167 | glBindTexture (myTarget, NO_TEXTURE); |
| 168 | } |
| 169 | |
| 170 | //======================================================================= |
| 171 | //function : InitSamplerObject |
| 172 | //purpose : |
| 173 | //======================================================================= |
| 174 | bool OpenGl_Texture::InitSamplerObject (const Handle(OpenGl_Context)& theCtx) |
| 175 | { |
| 176 | return myTextureId != NO_TEXTURE |
| 177 | && mySampler->Init (theCtx, *this); |
| 178 | } |
| 179 | |
| 180 | //======================================================================= |
| 181 | //function : GetDataFormat |
| 182 | //purpose : |
| 183 | //======================================================================= |
| 184 | bool OpenGl_Texture::GetDataFormat (const Handle(OpenGl_Context)& theCtx, |
| 185 | const Image_PixMap& theData, |
| 186 | GLint& theTextFormat, |
| 187 | GLenum& thePixelFormat, |
| 188 | GLenum& theDataType) |
| 189 | { |
| 190 | theTextFormat = GL_RGBA8; |
| 191 | thePixelFormat = 0; |
| 192 | theDataType = 0; |
| 193 | switch (theData.Format()) |
| 194 | { |
| 195 | case Image_Format_GrayF: |
| 196 | { |
| 197 | if (theCtx->core11 == NULL) |
| 198 | { |
| 199 | theTextFormat = GL_R8; // GL_R32F |
| 200 | thePixelFormat = GL_RED; |
| 201 | } |
| 202 | else |
| 203 | { |
| 204 | #if !defined(GL_ES_VERSION_2_0) |
| 205 | theTextFormat = GL_LUMINANCE8; |
| 206 | #else |
| 207 | theTextFormat = GL_LUMINANCE; |
| 208 | #endif |
| 209 | thePixelFormat = GL_LUMINANCE; |
| 210 | } |
| 211 | theDataType = GL_FLOAT; |
| 212 | return true; |
| 213 | } |
| 214 | case Image_Format_AlphaF: |
| 215 | { |
| 216 | if (theCtx->core11 == NULL) |
| 217 | { |
| 218 | theTextFormat = GL_R8; // GL_R32F |
| 219 | thePixelFormat = GL_RED; |
| 220 | } |
| 221 | else |
| 222 | { |
| 223 | #if !defined(GL_ES_VERSION_2_0) |
| 224 | theTextFormat = GL_ALPHA8; |
| 225 | #else |
| 226 | theTextFormat = GL_ALPHA; |
| 227 | #endif |
| 228 | thePixelFormat = GL_ALPHA; |
| 229 | } |
| 230 | theDataType = GL_FLOAT; |
| 231 | return true; |
| 232 | } |
| 233 | case Image_Format_RGBAF: |
| 234 | { |
| 235 | theTextFormat = GL_RGBA8; // GL_RGBA32F |
| 236 | thePixelFormat = GL_RGBA; |
| 237 | theDataType = GL_FLOAT; |
| 238 | return true; |
| 239 | } |
| 240 | case Image_Format_BGRAF: |
| 241 | { |
| 242 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
| 243 | { |
| 244 | return false; |
| 245 | } |
| 246 | theTextFormat = GL_RGBA8; // GL_RGBA32F |
| 247 | thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA |
| 248 | theDataType = GL_FLOAT; |
| 249 | return true; |
| 250 | } |
| 251 | case Image_Format_RGBF: |
| 252 | { |
| 253 | theTextFormat = GL_RGB8; // GL_RGB32F |
| 254 | thePixelFormat = GL_RGB; |
| 255 | theDataType = GL_FLOAT; |
| 256 | return true; |
| 257 | } |
| 258 | case Image_Format_BGRF: |
| 259 | { |
| 260 | #if !defined(GL_ES_VERSION_2_0) |
| 261 | theTextFormat = GL_RGB8; // GL_RGB32F |
| 262 | thePixelFormat = GL_BGR; // equals to GL_BGR_EXT |
| 263 | theDataType = GL_FLOAT; |
| 264 | return true; |
| 265 | #else |
| 266 | return false; |
| 267 | #endif |
| 268 | } |
| 269 | case Image_Format_RGBA: |
| 270 | { |
| 271 | theTextFormat = GL_RGBA8; |
| 272 | thePixelFormat = GL_RGBA; |
| 273 | theDataType = GL_UNSIGNED_BYTE; |
| 274 | return true; |
| 275 | } |
| 276 | case Image_Format_BGRA: |
| 277 | { |
| 278 | #if !defined(GL_ES_VERSION_2_0) |
| 279 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
| 280 | { |
| 281 | return false; |
| 282 | } |
| 283 | theTextFormat = GL_RGBA8; |
| 284 | #else |
| 285 | if (!theCtx->extBgra) |
| 286 | { |
| 287 | return false; |
| 288 | } |
| 289 | theTextFormat = GL_BGRA_EXT; |
| 290 | #endif |
| 291 | thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA |
| 292 | theDataType = GL_UNSIGNED_BYTE; |
| 293 | return true; |
| 294 | } |
| 295 | case Image_Format_RGB32: |
| 296 | { |
| 297 | #if !defined(GL_ES_VERSION_2_0) |
| 298 | // ask driver to convert data to RGB8 to save memory |
| 299 | theTextFormat = GL_RGB8; |
| 300 | #else |
| 301 | // conversion is not supported |
| 302 | theTextFormat = GL_RGBA8; |
| 303 | #endif |
| 304 | thePixelFormat = GL_RGBA; |
| 305 | theDataType = GL_UNSIGNED_BYTE; |
| 306 | return true; |
| 307 | } |
| 308 | case Image_Format_BGR32: |
| 309 | { |
| 310 | #if !defined(GL_ES_VERSION_2_0) |
| 311 | if (!theCtx->IsGlGreaterEqual(1, 2) && !theCtx->extBgra) |
| 312 | { |
| 313 | return false; |
| 314 | } |
| 315 | theTextFormat = GL_RGB8; |
| 316 | #else |
| 317 | if (!theCtx->extBgra) |
| 318 | { |
| 319 | return false; |
| 320 | } |
| 321 | theTextFormat = GL_BGRA_EXT; |
| 322 | #endif |
| 323 | thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA |
| 324 | theDataType = GL_UNSIGNED_BYTE; |
| 325 | return true; |
| 326 | } |
| 327 | case Image_Format_RGB: |
| 328 | { |
| 329 | theTextFormat = GL_RGB8; |
| 330 | thePixelFormat = GL_RGB; |
| 331 | theDataType = GL_UNSIGNED_BYTE; |
| 332 | return true; |
| 333 | } |
| 334 | case Image_Format_BGR: |
| 335 | { |
| 336 | #if !defined(GL_ES_VERSION_2_0) |
| 337 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
| 338 | { |
| 339 | return false; |
| 340 | } |
| 341 | theTextFormat = GL_RGB8; |
| 342 | thePixelFormat = GL_BGR; // equals to GL_BGR_EXT |
| 343 | theDataType = GL_UNSIGNED_BYTE; |
| 344 | return true; |
| 345 | #else |
| 346 | return false; |
| 347 | #endif |
| 348 | } |
| 349 | case Image_Format_Gray: |
| 350 | { |
| 351 | if (theCtx->core11 == NULL) |
| 352 | { |
| 353 | theTextFormat = GL_R8; |
| 354 | thePixelFormat = GL_RED; |
| 355 | } |
| 356 | else |
| 357 | { |
| 358 | #if !defined(GL_ES_VERSION_2_0) |
| 359 | theTextFormat = GL_LUMINANCE8; |
| 360 | #else |
| 361 | theTextFormat = GL_LUMINANCE; |
| 362 | #endif |
| 363 | thePixelFormat = GL_LUMINANCE; |
| 364 | } |
| 365 | theDataType = GL_UNSIGNED_BYTE; |
| 366 | return true; |
| 367 | } |
| 368 | case Image_Format_Alpha: |
| 369 | { |
| 370 | if (theCtx->core11 == NULL) |
| 371 | { |
| 372 | theTextFormat = GL_R8; |
| 373 | thePixelFormat = GL_RED; |
| 374 | } |
| 375 | else |
| 376 | { |
| 377 | #if !defined(GL_ES_VERSION_2_0) |
| 378 | theTextFormat = GL_ALPHA8; |
| 379 | #else |
| 380 | theTextFormat = GL_ALPHA; |
| 381 | #endif |
| 382 | thePixelFormat = GL_ALPHA; |
| 383 | } |
| 384 | theDataType = GL_UNSIGNED_BYTE; |
| 385 | return true; |
| 386 | } |
| 387 | case Image_Format_UNKNOWN: |
| 388 | { |
| 389 | return false; |
| 390 | } |
| 391 | } |
| 392 | return false; |
| 393 | } |
| 394 | |
| 395 | // ======================================================================= |
| 396 | // function : Init |
| 397 | // purpose : |
| 398 | // ======================================================================= |
| 399 | bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx, |
| 400 | const Standard_Integer theTextFormat, |
| 401 | const GLenum thePixelFormat, |
| 402 | const GLenum theDataType, |
| 403 | const Standard_Integer theSizeX, |
| 404 | const Standard_Integer theSizeY, |
| 405 | const Graphic3d_TypeOfTexture theType, |
| 406 | const Image_PixMap* theImage) |
| 407 | { |
| 408 | if (theSizeX < 1 |
| 409 | || theSizeY < 1) |
| 410 | { |
| 411 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
| 412 | "Error: texture of 0 size cannot be created."); |
| 413 | Release (theCtx.operator->()); |
| 414 | return false; |
| 415 | } |
| 416 | |
| 417 | #if !defined(GL_ES_VERSION_2_0) |
| 418 | const GLenum aTarget = theType == Graphic3d_TOT_1D |
| 419 | ? GL_TEXTURE_1D |
| 420 | : GL_TEXTURE_2D; |
| 421 | #else |
| 422 | const GLenum aTarget = GL_TEXTURE_2D; |
| 423 | #endif |
| 424 | const Standard_Boolean toCreateMipMaps = (theType == Graphic3d_TOT_2D_MIPMAP); |
| 425 | const bool toPatchExisting = IsValid() |
| 426 | && myTextFormat == thePixelFormat |
| 427 | && myTarget == aTarget |
| 428 | && myHasMipmaps == toCreateMipMaps |
| 429 | && mySizeX == theSizeX |
| 430 | && (mySizeY == theSizeY || theType == Graphic3d_TOT_1D); |
| 431 | if (!Create (theCtx)) |
| 432 | { |
| 433 | Release (theCtx.operator->()); |
| 434 | return false; |
| 435 | } |
| 436 | |
| 437 | if (theImage != NULL) |
| 438 | { |
| 439 | myIsAlpha = theImage->Format() == Image_Format_Alpha |
| 440 | || theImage->Format() == Image_Format_AlphaF; |
| 441 | } |
| 442 | else |
| 443 | { |
| 444 | myIsAlpha = thePixelFormat == GL_ALPHA; |
| 445 | } |
| 446 | |
| 447 | myHasMipmaps = toCreateMipMaps; |
| 448 | myTextFormat = thePixelFormat; |
| 449 | mySizedFormat = theTextFormat; |
| 450 | myNbSamples = 1; |
| 451 | #if !defined(GL_ES_VERSION_2_0) |
| 452 | const GLint anIntFormat = theTextFormat; |
| 453 | #else |
| 454 | // ES 2.0 does not support sized formats and format conversions - them detected from data type |
| 455 | const GLint anIntFormat = theCtx->IsGlGreaterEqual (3, 0) ? theTextFormat : thePixelFormat; |
| 456 | #endif |
| 457 | |
| 458 | if (theDataType == GL_FLOAT && !theCtx->arbTexFloat) |
| 459 | { |
| 460 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
| 461 | "Error: floating-point textures are not supported by hardware."); |
| 462 | Release (theCtx.operator->()); |
| 463 | return false; |
| 464 | } |
| 465 | |
| 466 | const GLsizei aMaxSize = theCtx->MaxTextureSize(); |
| 467 | if (theSizeX > aMaxSize |
| 468 | || theSizeY > aMaxSize) |
| 469 | { |
| 470 | TCollection_ExtendedString aWarnMessage = TCollection_ExtendedString ("Error: Texture dimension - ") |
| 471 | + theSizeX + "x" + theSizeY + " exceeds hardware limits (" + aMaxSize + "x" + aMaxSize + ")"; |
| 472 | |
| 473 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
| 474 | Release (theCtx.operator->()); |
| 475 | return false; |
| 476 | } |
| 477 | #if !defined(GL_ES_VERSION_2_0) |
| 478 | else if (!theCtx->IsGlGreaterEqual (3, 0) && !theCtx->arbNPTW) |
| 479 | { |
| 480 | // Notice that formally general NPOT textures are required by OpenGL 2.0 specifications |
| 481 | // however some hardware (NV30 - GeForce FX, RadeOn 9xxx and Xxxx) supports GLSL but not NPOT! |
| 482 | // Trying to create NPOT textures on such hardware will not fail |
| 483 | // but driver will fall back into software rendering, |
| 484 | const GLsizei aWidthP2 = OpenGl_Context::GetPowerOfTwo (theSizeX, aMaxSize); |
| 485 | const GLsizei aHeightP2 = OpenGl_Context::GetPowerOfTwo (theSizeY, aMaxSize); |
| 486 | |
| 487 | if (theSizeX != aWidthP2 |
| 488 | || (theType != Graphic3d_TOT_1D && theSizeY != aHeightP2)) |
| 489 | { |
| 490 | TCollection_ExtendedString aWarnMessage = |
| 491 | TCollection_ExtendedString ("Error: NPOT Textures (") + theSizeX + "x" + theSizeY + ") are not supported by hardware."; |
| 492 | |
| 493 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
| 494 | |
| 495 | Release (theCtx.operator->()); |
| 496 | return false; |
| 497 | } |
| 498 | } |
| 499 | #else |
| 500 | else if (!theCtx->IsGlGreaterEqual (3, 0) && theType == Graphic3d_TOT_2D_MIPMAP) |
| 501 | { |
| 502 | // Mipmap NPOT textures are not supported by OpenGL ES 2.0. |
| 503 | const GLsizei aWidthP2 = OpenGl_Context::GetPowerOfTwo (theSizeX, aMaxSize); |
| 504 | const GLsizei aHeightP2 = OpenGl_Context::GetPowerOfTwo (theSizeY, aMaxSize); |
| 505 | |
| 506 | if (theSizeX != aWidthP2 |
| 507 | || theSizeY != aHeightP2) |
| 508 | { |
| 509 | TCollection_ExtendedString aWarnMessage = |
| 510 | TCollection_ExtendedString ("Error: Mipmap NPOT Textures (") + theSizeX + "x" + theSizeY + ") are not supported by OpenGL ES 2.0"; |
| 511 | |
| 512 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
| 513 | |
| 514 | Release (theCtx.operator->()); |
| 515 | return false; |
| 516 | } |
| 517 | } |
| 518 | #endif |
| 519 | |
| 520 | #if !defined(GL_ES_VERSION_2_0) |
| 521 | GLint aTestWidth = 0; |
| 522 | GLint aTestHeight = 0; |
| 523 | #endif |
| 524 | GLvoid* aDataPtr = (theImage != NULL) ? (GLvoid* )theImage->Data() : NULL; |
| 525 | |
| 526 | // setup the alignment |
| 527 | OpenGl_UnpackAlignmentSentry anUnpackSentry; |
| 528 | (void)anUnpackSentry; // avoid compiler warning |
| 529 | |
| 530 | if (aDataPtr != NULL) |
| 531 | { |
| 532 | const GLint anAligment = Min ((GLint )theImage->MaxRowAligmentBytes(), 8); // OpenGL supports alignment upto 8 bytes |
| 533 | glPixelStorei (GL_UNPACK_ALIGNMENT, anAligment); |
| 534 | |
| 535 | #if !defined(GL_ES_VERSION_2_0) |
| 536 | // notice that GL_UNPACK_ROW_LENGTH is not available on OpenGL ES 2.0 without GL_EXT_unpack_subimage extension |
| 537 | const GLint anExtraBytes = GLint(theImage->RowExtraBytes()); |
| 538 | const GLint aPixelsWidth = GLint(theImage->SizeRowBytes() / theImage->SizePixelBytes()); |
| 539 | glPixelStorei (GL_UNPACK_ROW_LENGTH, (anExtraBytes >= anAligment) ? aPixelsWidth : 0); |
| 540 | #endif |
| 541 | } |
| 542 | |
| 543 | myTarget = aTarget; |
| 544 | switch (theType) |
| 545 | { |
| 546 | case Graphic3d_TOT_1D: |
| 547 | { |
| 548 | #if !defined(GL_ES_VERSION_2_0) |
| 549 | Bind (theCtx); |
| 550 | applyDefaultSamplerParams (theCtx); |
| 551 | if (toPatchExisting) |
| 552 | { |
| 553 | glTexSubImage1D (GL_TEXTURE_1D, 0, 0, |
| 554 | theSizeX, thePixelFormat, theDataType, aDataPtr); |
| 555 | Unbind (theCtx); |
| 556 | return true; |
| 557 | } |
| 558 | |
| 559 | // use proxy to check texture could be created or not |
| 560 | glTexImage1D (GL_PROXY_TEXTURE_1D, 0, anIntFormat, |
| 561 | theSizeX, 0, |
| 562 | thePixelFormat, theDataType, NULL); |
| 563 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_1D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
| 564 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_1D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
| 565 | if (aTestWidth == 0) |
| 566 | { |
| 567 | // no memory or broken input parameters |
| 568 | Unbind (theCtx); |
| 569 | Release (theCtx.operator->()); |
| 570 | return false; |
| 571 | } |
| 572 | |
| 573 | glTexImage1D (GL_TEXTURE_1D, 0, anIntFormat, |
| 574 | theSizeX, 0, |
| 575 | thePixelFormat, theDataType, aDataPtr); |
| 576 | if (glGetError() != GL_NO_ERROR) |
| 577 | { |
| 578 | Unbind (theCtx); |
| 579 | Release (theCtx.operator->()); |
| 580 | return false; |
| 581 | } |
| 582 | |
| 583 | mySizeX = theSizeX; |
| 584 | mySizeY = 1; |
| 585 | |
| 586 | Unbind (theCtx); |
| 587 | return true; |
| 588 | #else |
| 589 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
| 590 | "Error: 1D textures are not supported by hardware."); |
| 591 | Release (theCtx.operator->()); |
| 592 | return false; |
| 593 | #endif |
| 594 | } |
| 595 | case Graphic3d_TOT_2D: |
| 596 | { |
| 597 | Bind (theCtx); |
| 598 | applyDefaultSamplerParams (theCtx); |
| 599 | if (toPatchExisting) |
| 600 | { |
| 601 | glTexSubImage2D (GL_TEXTURE_2D, 0, |
| 602 | 0, 0, |
| 603 | theSizeX, theSizeY, |
| 604 | thePixelFormat, theDataType, aDataPtr); |
| 605 | Unbind (theCtx); |
| 606 | return true; |
| 607 | } |
| 608 | |
| 609 | #if !defined(GL_ES_VERSION_2_0) |
| 610 | // use proxy to check texture could be created or not |
| 611 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, anIntFormat, |
| 612 | theSizeX, theSizeY, 0, |
| 613 | thePixelFormat, theDataType, NULL); |
| 614 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
| 615 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
| 616 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
| 617 | if (aTestWidth == 0 || aTestHeight == 0) |
| 618 | { |
| 619 | // no memory or broken input parameters |
| 620 | Unbind (theCtx); |
| 621 | Release (theCtx.operator->()); |
| 622 | return false; |
| 623 | } |
| 624 | #endif |
| 625 | |
| 626 | glTexImage2D (GL_TEXTURE_2D, 0, anIntFormat, |
| 627 | theSizeX, theSizeY, 0, |
| 628 | thePixelFormat, theDataType, aDataPtr); |
| 629 | const GLenum anErr = glGetError(); |
| 630 | if (anErr != GL_NO_ERROR) |
| 631 | { |
| 632 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
| 633 | TCollection_AsciiString ("Error: 2D texture ") + theSizeX + "x" + theSizeY |
| 634 | + " IF: " + int(anIntFormat) + " PF: " + int(thePixelFormat) + " DT: " + int(theDataType) |
| 635 | + " can not be created with error " + int(anErr) + "."); |
| 636 | Unbind (theCtx); |
| 637 | Release (theCtx.operator->()); |
| 638 | return false; |
| 639 | } |
| 640 | |
| 641 | mySizeX = theSizeX; |
| 642 | mySizeY = theSizeY; |
| 643 | |
| 644 | Unbind (theCtx); |
| 645 | return true; |
| 646 | } |
| 647 | case Graphic3d_TOT_2D_MIPMAP: |
| 648 | { |
| 649 | Bind (theCtx); |
| 650 | applyDefaultSamplerParams (theCtx); |
| 651 | if (toPatchExisting) |
| 652 | { |
| 653 | glTexSubImage2D (GL_TEXTURE_2D, 0, |
| 654 | 0, 0, |
| 655 | theSizeX, theSizeY, |
| 656 | thePixelFormat, theDataType, aDataPtr); |
| 657 | if (theCtx->arbFBO != NULL) |
| 658 | { |
| 659 | // generate mipmaps |
| 660 | theCtx->arbFBO->glGenerateMipmap (GL_TEXTURE_2D); |
| 661 | if (glGetError() != GL_NO_ERROR) |
| 662 | { |
| 663 | Unbind (theCtx); |
| 664 | Release (theCtx.operator->()); |
| 665 | return false; |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | Unbind (theCtx); |
| 670 | return true; |
| 671 | } |
| 672 | |
| 673 | #if !defined(GL_ES_VERSION_2_0) |
| 674 | // use proxy to check texture could be created or not |
| 675 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, anIntFormat, |
| 676 | theSizeX, theSizeY, 0, |
| 677 | thePixelFormat, theDataType, NULL); |
| 678 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
| 679 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
| 680 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
| 681 | if (aTestWidth == 0 || aTestHeight == 0) |
| 682 | { |
| 683 | // no memory or broken input parameters |
| 684 | Unbind (theCtx); |
| 685 | Release (theCtx.operator->()); |
| 686 | return false; |
| 687 | } |
| 688 | #endif |
| 689 | |
| 690 | // upload main picture |
| 691 | glTexImage2D (GL_TEXTURE_2D, 0, anIntFormat, |
| 692 | theSizeX, theSizeY, 0, |
| 693 | thePixelFormat, theDataType, theImage->Data()); |
| 694 | const GLenum aTexImgErr = glGetError(); |
| 695 | if (aTexImgErr != GL_NO_ERROR) |
| 696 | { |
| 697 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
| 698 | TCollection_AsciiString ("Error: 2D texture ") + theSizeX + "x" + theSizeY |
| 699 | + " IF: " + int(anIntFormat) + " PF: " + int(thePixelFormat) + " DT: " + int(theDataType) |
| 700 | + " can not be created with error " + int(aTexImgErr) + "."); |
| 701 | Unbind (theCtx); |
| 702 | Release (theCtx.operator->()); |
| 703 | return false; |
| 704 | } |
| 705 | |
| 706 | mySizeX = theSizeX; |
| 707 | mySizeY = theSizeY; |
| 708 | |
| 709 | if (theCtx->arbFBO != NULL) |
| 710 | { |
| 711 | // generate mipmaps |
| 712 | //glHint (GL_GENERATE_MIPMAP_HINT, GL_NICEST); |
| 713 | theCtx->arbFBO->glGenerateMipmap (GL_TEXTURE_2D); |
| 714 | |
| 715 | if (glGetError() != GL_NO_ERROR) |
| 716 | { |
| 717 | Unbind (theCtx); |
| 718 | Release (theCtx.operator->()); |
| 719 | return false; |
| 720 | } |
| 721 | } |
| 722 | else |
| 723 | { |
| 724 | const TCollection_ExtendedString aWarnMessage ("Warning: generating mipmaps requires GL_ARB_framebuffer_object extension which is missing."); |
| 725 | |
| 726 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
| 727 | |
| 728 | Unbind (theCtx); |
| 729 | Release (theCtx.operator->()); |
| 730 | return false; |
| 731 | } |
| 732 | |
| 733 | Unbind (theCtx); |
| 734 | return true; |
| 735 | } |
| 736 | } |
| 737 | |
| 738 | Release (theCtx.operator->()); |
| 739 | return false; |
| 740 | } |
| 741 | |
| 742 | // ======================================================================= |
| 743 | // function : Init |
| 744 | // purpose : |
| 745 | // ======================================================================= |
| 746 | bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx, |
| 747 | const Image_PixMap& theImage, |
| 748 | const Graphic3d_TypeOfTexture theType) |
| 749 | { |
| 750 | if (theImage.IsEmpty()) |
| 751 | { |
| 752 | Release (theCtx.operator->()); |
| 753 | return false; |
| 754 | } |
| 755 | |
| 756 | GLenum aPixelFormat; |
| 757 | GLenum aDataType; |
| 758 | GLint aTextFormat; |
| 759 | if (!GetDataFormat (theCtx, theImage, aTextFormat, aPixelFormat, aDataType)) |
| 760 | { |
| 761 | Release (theCtx.operator->()); |
| 762 | return false; |
| 763 | } |
| 764 | |
| 765 | return Init (theCtx, |
| 766 | aTextFormat, aPixelFormat, aDataType, |
| 767 | (Standard_Integer)theImage.SizeX(), |
| 768 | (Standard_Integer)theImage.SizeY(), |
| 769 | theType, &theImage); |
| 770 | } |
| 771 | |
| 772 | // ======================================================================= |
| 773 | // function : Init2DMultisample |
| 774 | // purpose : |
| 775 | // ======================================================================= |
| 776 | bool OpenGl_Texture::Init2DMultisample (const Handle(OpenGl_Context)& theCtx, |
| 777 | const GLsizei theNbSamples, |
| 778 | const GLint theTextFormat, |
| 779 | const GLsizei theSizeX, |
| 780 | const GLsizei theSizeY) |
| 781 | { |
| 782 | if (!Create (theCtx) |
| 783 | || theNbSamples > theCtx->MaxMsaaSamples() |
| 784 | || theNbSamples < 1) |
| 785 | { |
| 786 | return false; |
| 787 | } |
| 788 | |
| 789 | myNbSamples = OpenGl_Context::GetPowerOfTwo (theNbSamples, theCtx->MaxMsaaSamples()); |
| 790 | myTarget = GL_TEXTURE_2D_MULTISAMPLE; |
| 791 | myHasMipmaps = false; |
| 792 | if(theSizeX > theCtx->MaxTextureSize() |
| 793 | || theSizeY > theCtx->MaxTextureSize()) |
| 794 | { |
| 795 | return false; |
| 796 | } |
| 797 | |
| 798 | Bind (theCtx); |
| 799 | //myTextFormat = theTextFormat; |
| 800 | mySizedFormat = theTextFormat; |
| 801 | #if !defined(GL_ES_VERSION_2_0) |
| 802 | if (theCtx->Functions()->glTexStorage2DMultisample != NULL) |
| 803 | { |
| 804 | theCtx->Functions()->glTexStorage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE); |
| 805 | } |
| 806 | else |
| 807 | { |
| 808 | theCtx->Functions()->glTexImage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE); |
| 809 | } |
| 810 | #else |
| 811 | theCtx->Functions() ->glTexStorage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE); |
| 812 | #endif |
| 813 | if (theCtx->core11fwd->glGetError() != GL_NO_ERROR) |
| 814 | { |
| 815 | Unbind (theCtx); |
| 816 | return false; |
| 817 | } |
| 818 | |
| 819 | mySizeX = theSizeX; |
| 820 | mySizeY = theSizeY; |
| 821 | |
| 822 | Unbind (theCtx); |
| 823 | return true; |
| 824 | } |
| 825 | |
| 826 | // ======================================================================= |
| 827 | // function : InitRectangle |
| 828 | // purpose : |
| 829 | // ======================================================================= |
| 830 | bool OpenGl_Texture::InitRectangle (const Handle(OpenGl_Context)& theCtx, |
| 831 | const Standard_Integer theSizeX, |
| 832 | const Standard_Integer theSizeY, |
| 833 | const OpenGl_TextureFormat& theFormat) |
| 834 | { |
| 835 | if (!Create (theCtx) || !theCtx->IsGlGreaterEqual (3, 0)) |
| 836 | { |
| 837 | return false; |
| 838 | } |
| 839 | |
| 840 | #if !defined(GL_ES_VERSION_2_0) |
| 841 | myTarget = GL_TEXTURE_RECTANGLE; |
| 842 | myNbSamples = 1; |
| 843 | myHasMipmaps = false; |
| 844 | |
| 845 | const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX); |
| 846 | const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY); |
| 847 | |
| 848 | Bind (theCtx); |
| 849 | applyDefaultSamplerParams (theCtx); |
| 850 | |
| 851 | myTextFormat = theFormat.Format(); |
| 852 | mySizedFormat = theFormat.Internal(); |
| 853 | |
| 854 | // setup the alignment |
| 855 | OpenGl_UnpackAlignmentSentry::Reset(); |
| 856 | |
| 857 | glTexImage2D (GL_PROXY_TEXTURE_RECTANGLE, 0, mySizedFormat, |
| 858 | aSizeX, aSizeY, 0, |
| 859 | myTextFormat, GL_FLOAT, NULL); |
| 860 | |
| 861 | GLint aTestSizeX = 0; |
| 862 | GLint aTestSizeY = 0; |
| 863 | |
| 864 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_WIDTH, &aTestSizeX); |
| 865 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_HEIGHT, &aTestSizeY); |
| 866 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
| 867 | |
| 868 | if (aTestSizeX == 0 || aTestSizeY == 0) |
| 869 | { |
| 870 | Unbind (theCtx); |
| 871 | return false; |
| 872 | } |
| 873 | |
| 874 | glTexImage2D (myTarget, 0, mySizedFormat, |
| 875 | aSizeX, aSizeY, 0, |
| 876 | myTextFormat, GL_FLOAT, NULL); |
| 877 | |
| 878 | if (glGetError() != GL_NO_ERROR) |
| 879 | { |
| 880 | Unbind (theCtx); |
| 881 | return false; |
| 882 | } |
| 883 | |
| 884 | mySizeX = aSizeX; |
| 885 | mySizeY = aSizeY; |
| 886 | |
| 887 | Unbind (theCtx); |
| 888 | return true; |
| 889 | #else |
| 890 | (void )theSizeX; |
| 891 | (void )theSizeY; |
| 892 | (void )theFormat; |
| 893 | return false; |
| 894 | #endif |
| 895 | } |
| 896 | |
| 897 | // ======================================================================= |
| 898 | // function : Init3D |
| 899 | // purpose : |
| 900 | // ======================================================================= |
| 901 | bool OpenGl_Texture::Init3D (const Handle(OpenGl_Context)& theCtx, |
| 902 | const GLint theTextFormat, |
| 903 | const GLenum thePixelFormat, |
| 904 | const GLenum theDataType, |
| 905 | const Standard_Integer theSizeX, |
| 906 | const Standard_Integer theSizeY, |
| 907 | const Standard_Integer theSizeZ, |
| 908 | const void* thePixels) |
| 909 | { |
| 910 | if (theCtx->Functions()->glTexImage3D == NULL) |
| 911 | { |
| 912 | TCollection_ExtendedString aMsg ("Error: three-dimensional textures are not supported by hardware."); |
| 913 | |
| 914 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, |
| 915 | GL_DEBUG_TYPE_ERROR, |
| 916 | 0, |
| 917 | GL_DEBUG_SEVERITY_HIGH, |
| 918 | aMsg); |
| 919 | |
| 920 | return false; |
| 921 | } |
| 922 | |
| 923 | if (!Create(theCtx)) |
| 924 | { |
| 925 | return false; |
| 926 | } |
| 927 | |
| 928 | myTarget = GL_TEXTURE_3D; |
| 929 | myNbSamples = 1; |
| 930 | myHasMipmaps = false; |
| 931 | |
| 932 | const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX); |
| 933 | const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY); |
| 934 | const GLsizei aSizeZ = Min (theCtx->MaxTextureSize(), theSizeZ); |
| 935 | |
| 936 | Bind (theCtx); |
| 937 | |
| 938 | if (theDataType == GL_FLOAT && !theCtx->arbTexFloat) |
| 939 | { |
| 940 | TCollection_ExtendedString aMsg ("Error: floating-point textures are not supported by hardware."); |
| 941 | |
| 942 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, |
| 943 | GL_DEBUG_TYPE_ERROR, |
| 944 | 0, |
| 945 | GL_DEBUG_SEVERITY_HIGH, |
| 946 | aMsg); |
| 947 | |
| 948 | Release (theCtx.operator->()); |
| 949 | Unbind (theCtx); |
| 950 | return false; |
| 951 | } |
| 952 | |
| 953 | mySizedFormat = theTextFormat; |
| 954 | |
| 955 | // setup the alignment |
| 956 | OpenGl_UnpackAlignmentSentry::Reset(); |
| 957 | |
| 958 | #if !defined (GL_ES_VERSION_2_0) |
| 959 | theCtx->core15fwd->glTexImage3D (GL_PROXY_TEXTURE_3D, 0, mySizedFormat, |
| 960 | aSizeX, aSizeY, aSizeZ, 0, |
| 961 | thePixelFormat, theDataType, NULL); |
| 962 | |
| 963 | GLint aTestSizeX = 0; |
| 964 | GLint aTestSizeY = 0; |
| 965 | GLint aTestSizeZ = 0; |
| 966 | |
| 967 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &aTestSizeX); |
| 968 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_HEIGHT, &aTestSizeY); |
| 969 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_DEPTH, &aTestSizeZ); |
| 970 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
| 971 | |
| 972 | if (aTestSizeX == 0 || aTestSizeY == 0 || aTestSizeZ == 0) |
| 973 | { |
| 974 | Unbind (theCtx); |
| 975 | Release (theCtx.operator->()); |
| 976 | return false; |
| 977 | } |
| 978 | #endif |
| 979 | |
| 980 | applyDefaultSamplerParams (theCtx); |
| 981 | theCtx->Functions()->glTexImage3D (myTarget, 0, mySizedFormat, |
| 982 | aSizeX, aSizeY, aSizeZ, 0, |
| 983 | thePixelFormat, theDataType, thePixels); |
| 984 | |
| 985 | if (glGetError() != GL_NO_ERROR) |
| 986 | { |
| 987 | Unbind (theCtx); |
| 988 | Release (theCtx.operator->()); |
| 989 | return false; |
| 990 | } |
| 991 | |
| 992 | mySizeX = aSizeX; |
| 993 | mySizeY = aSizeY; |
| 994 | mySizeZ = aSizeZ; |
| 995 | |
| 996 | Unbind (theCtx); |
| 997 | return true; |
| 998 | } |
| 999 | |
| 1000 | // ======================================================================= |
| 1001 | // function : PixelSizeOfPixelFormat |
| 1002 | // purpose : |
| 1003 | // ======================================================================= |
| 1004 | Standard_Size OpenGl_Texture::PixelSizeOfPixelFormat (Standard_Integer theInternalFormat) |
| 1005 | { |
| 1006 | switch(theInternalFormat) |
| 1007 | { |
| 1008 | // RED variations (GL_RED, OpenGL 3.0+) |
| 1009 | case GL_RED: |
| 1010 | case GL_R8: return 1; |
| 1011 | case GL_R16: return 2; |
| 1012 | case GL_R16F: return 2; |
| 1013 | case GL_R32F: return 4; |
| 1014 | // RGB variations |
| 1015 | case GL_RGB: return 3; |
| 1016 | case GL_RGB8: return 3; |
| 1017 | case GL_RGB16: return 6; |
| 1018 | case GL_RGB16F: return 6; |
| 1019 | case GL_RGB32F: return 12; |
| 1020 | // RGBA variations |
| 1021 | case GL_RGBA: return 4; |
| 1022 | case GL_RGBA8: return 4; |
| 1023 | case GL_RGB10_A2: return 4; |
| 1024 | case GL_RGBA12: return 6; |
| 1025 | case GL_RGBA16: return 8; |
| 1026 | case GL_RGBA16F: return 8; |
| 1027 | case GL_RGBA32F: return 16; |
| 1028 | // |
| 1029 | case GL_BGRA_EXT: return 4; |
| 1030 | // ALPHA variations (deprecated) |
| 1031 | case GL_ALPHA: |
| 1032 | case GL_ALPHA8: return 1; |
| 1033 | case GL_ALPHA16: return 2; |
| 1034 | case GL_LUMINANCE: return 1; |
| 1035 | case GL_LUMINANCE_ALPHA: return 2; |
| 1036 | // depth-stencil |
| 1037 | case GL_DEPTH24_STENCIL8: return 4; |
| 1038 | case GL_DEPTH32F_STENCIL8: return 8; |
| 1039 | case GL_DEPTH_COMPONENT16: return 2; |
| 1040 | case GL_DEPTH_COMPONENT24: return 3; |
| 1041 | case GL_DEPTH_COMPONENT32F: return 4; |
| 1042 | } |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | // ======================================================================= |
| 1047 | // function : EstimatedDataSize |
| 1048 | // purpose : |
| 1049 | // ======================================================================= |
| 1050 | Standard_Size OpenGl_Texture::EstimatedDataSize() const |
| 1051 | { |
| 1052 | if (!IsValid()) |
| 1053 | { |
| 1054 | return 0; |
| 1055 | } |
| 1056 | |
| 1057 | Standard_Size aSize = PixelSizeOfPixelFormat (mySizedFormat) * mySizeX * myNbSamples; |
| 1058 | if (mySizeY != 0) |
| 1059 | { |
| 1060 | aSize *= Standard_Size(mySizeY); |
| 1061 | } |
| 1062 | if (mySizeZ != 0) |
| 1063 | { |
| 1064 | aSize *= Standard_Size(mySizeZ); |
| 1065 | } |
| 1066 | if (myHasMipmaps) |
| 1067 | { |
| 1068 | aSize = aSize + aSize / 3; |
| 1069 | } |
| 1070 | return aSize; |
| 1071 | } |