bf75be98 |
1 | // Created by: Kirill GAVRILOV |
d5f74e42 |
2 | // Copyright (c) 2013-2014 OPEN CASCADE SAS |
bf75be98 |
3 | // |
973c2be1 |
4 | // This file is part of Open CASCADE Technology software library. |
bf75be98 |
5 | // |
d5f74e42 |
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 |
973c2be1 |
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. |
bf75be98 |
11 | // |
973c2be1 |
12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
bf75be98 |
14 | |
15 | #include <OpenGl_Texture.hxx> |
16 | |
01ca42b2 |
17 | #include <OpenGl_ArbFBO.hxx> |
bf75be98 |
18 | #include <OpenGl_Context.hxx> |
01ca42b2 |
19 | #include <OpenGl_GlCore15.hxx> |
bf75be98 |
20 | #include <Graphic3d_TextureParams.hxx> |
21 | #include <Standard_Assert.hxx> |
22 | #include <Image_PixMap.hxx> |
23 | |
24 | IMPLEMENT_STANDARD_HANDLE (OpenGl_Texture, OpenGl_Resource) |
25 | IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Texture, OpenGl_Resource) |
26 | |
74706083 |
27 | //! Simple class to reset unpack alignment settings |
28 | struct OpenGl_UnpackAlignmentSentry |
29 | { |
30 | |
31 | //! Reset unpack alignment settings to safe values |
32 | void Reset() |
33 | { |
34 | glPixelStorei (GL_UNPACK_ALIGNMENT, 1); |
35 | glPixelStorei (GL_UNPACK_ROW_LENGTH, 0); |
36 | } |
37 | |
38 | ~OpenGl_UnpackAlignmentSentry() |
39 | { |
40 | Reset(); |
41 | } |
42 | |
43 | }; |
44 | |
bf75be98 |
45 | // ======================================================================= |
46 | // function : OpenGl_Texture |
47 | // purpose : |
48 | // ======================================================================= |
49 | OpenGl_Texture::OpenGl_Texture (const Handle(Graphic3d_TextureParams)& theParams) |
50 | : OpenGl_Resource(), |
51 | myTextureId (NO_TEXTURE), |
52 | myTarget (GL_TEXTURE_2D), |
53 | mySizeX (0), |
54 | mySizeY (0), |
55 | myTextFormat (GL_FLOAT), |
56 | myHasMipmaps (Standard_False), |
57 | myParams (theParams) |
58 | { |
59 | if (myParams.IsNull()) |
60 | { |
61 | myParams = new Graphic3d_TextureParams(); |
62 | } |
63 | } |
64 | |
65 | // ======================================================================= |
66 | // function : ~OpenGl_Texture |
67 | // purpose : |
68 | // ======================================================================= |
69 | OpenGl_Texture::~OpenGl_Texture() |
70 | { |
71 | Release (NULL); |
72 | } |
73 | |
74 | // ======================================================================= |
75 | // function : HasMipmaps |
76 | // purpose : |
77 | // ======================================================================= |
78 | const Standard_Boolean OpenGl_Texture::HasMipmaps() const |
79 | { |
80 | return myHasMipmaps; |
81 | } |
82 | |
83 | // ======================================================================= |
84 | // function : GetParams |
85 | // purpose : |
86 | // ======================================================================= |
87 | const Handle(Graphic3d_TextureParams)& OpenGl_Texture::GetParams() const |
88 | { |
89 | return myParams; |
90 | } |
91 | |
92 | // ======================================================================= |
93 | // function : SetParams |
94 | // purpose : |
95 | // ======================================================================= |
96 | void OpenGl_Texture::SetParams (const Handle(Graphic3d_TextureParams)& theParams) |
97 | { |
98 | myParams = theParams; |
99 | } |
100 | |
101 | // ======================================================================= |
102 | // function : Create |
103 | // purpose : |
104 | // ======================================================================= |
105 | bool OpenGl_Texture::Create (const Handle(OpenGl_Context)& ) |
106 | { |
107 | if (myTextureId == NO_TEXTURE) |
108 | { |
109 | glGenTextures (1, &myTextureId); |
110 | } |
111 | return myTextureId != NO_TEXTURE; |
112 | } |
113 | |
114 | // ======================================================================= |
115 | // function : Release |
116 | // purpose : |
117 | // ======================================================================= |
118 | void OpenGl_Texture::Release (const OpenGl_Context* theGlCtx) |
119 | { |
120 | if (myTextureId == NO_TEXTURE) |
121 | { |
122 | return; |
123 | } |
124 | |
125 | // application can not handle this case by exception - this is bug in code |
126 | Standard_ASSERT_RETURN (theGlCtx != NULL, |
127 | "OpenGl_Texture destroyed without GL context! Possible GPU memory leakage...",); |
128 | |
ec2eeb2d |
129 | if (theGlCtx->IsValid()) |
130 | { |
131 | glDeleteTextures (1, &myTextureId); |
132 | } |
bf75be98 |
133 | myTextureId = NO_TEXTURE; |
134 | mySizeX = mySizeY = 0; |
135 | } |
136 | |
137 | // ======================================================================= |
138 | // function : Bind |
139 | // purpose : |
140 | // ======================================================================= |
141 | void OpenGl_Texture::Bind (const Handle(OpenGl_Context)& theCtx, |
142 | const GLenum theTextureUnit) const |
143 | { |
01ca42b2 |
144 | if (theCtx->IsGlGreaterEqual (1, 5)) |
bf75be98 |
145 | { |
01ca42b2 |
146 | theCtx->core15fwd->glActiveTexture (theTextureUnit); |
bf75be98 |
147 | } |
148 | glBindTexture (myTarget, myTextureId); |
149 | } |
150 | |
151 | // ======================================================================= |
152 | // function : Unbind |
153 | // purpose : |
154 | // ======================================================================= |
155 | void OpenGl_Texture::Unbind (const Handle(OpenGl_Context)& theCtx, |
156 | const GLenum theTextureUnit) const |
157 | { |
01ca42b2 |
158 | if (theCtx->IsGlGreaterEqual (1, 5)) |
bf75be98 |
159 | { |
01ca42b2 |
160 | theCtx->core15fwd->glActiveTexture (theTextureUnit); |
bf75be98 |
161 | } |
162 | glBindTexture (myTarget, NO_TEXTURE); |
163 | } |
164 | |
165 | // ======================================================================= |
166 | // function : Init |
167 | // purpose : |
168 | // ======================================================================= |
169 | bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx, |
170 | const Image_PixMap& theImage, |
171 | const Graphic3d_TypeOfTexture theType) |
172 | { |
173 | myHasMipmaps = Standard_False; |
174 | if (theImage.IsEmpty() || !Create (theCtx)) |
175 | { |
176 | return false; |
177 | } |
178 | |
a577aaab |
179 | myTextFormat = GL_RGBA8; |
180 | GLenum aPixelFormat = 0; |
181 | GLenum aDataType = 0; |
bf75be98 |
182 | switch (theImage.Format()) |
183 | { |
184 | case Image_PixMap::ImgGrayF: |
185 | { |
a577aaab |
186 | myTextFormat = GL_ALPHA8; // GL_R8, GL_R32F |
187 | aPixelFormat = GL_ALPHA; // GL_RED |
188 | aDataType = GL_FLOAT; |
bf75be98 |
189 | break; |
190 | } |
191 | case Image_PixMap::ImgRGBAF: |
192 | { |
a577aaab |
193 | myTextFormat = GL_RGBA8; // GL_RGBA32F |
194 | aPixelFormat = GL_RGBA; |
195 | aDataType = GL_FLOAT; |
bf75be98 |
196 | break; |
197 | } |
198 | case Image_PixMap::ImgBGRAF: |
199 | { |
200 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
201 | { |
202 | return false; |
203 | } |
a577aaab |
204 | myTextFormat = GL_RGBA8; // GL_RGBA32F |
205 | aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT |
206 | aDataType = GL_FLOAT; |
bf75be98 |
207 | break; |
208 | } |
209 | case Image_PixMap::ImgRGBF: |
210 | { |
a577aaab |
211 | myTextFormat = GL_RGB8; // GL_RGB32F |
212 | aPixelFormat = GL_RGB; |
213 | aDataType = GL_FLOAT; |
bf75be98 |
214 | break; |
215 | } |
216 | case Image_PixMap::ImgBGRF: |
217 | { |
a577aaab |
218 | myTextFormat = GL_RGB8; // GL_RGB32F |
219 | aPixelFormat = GL_BGR; // equals to GL_BGR_EXT |
220 | aDataType = GL_FLOAT; |
bf75be98 |
221 | break; |
222 | } |
223 | case Image_PixMap::ImgRGBA: |
224 | { |
a577aaab |
225 | myTextFormat = GL_RGBA8; |
226 | aPixelFormat = GL_RGBA; |
227 | aDataType = GL_UNSIGNED_BYTE; |
bf75be98 |
228 | break; |
229 | } |
230 | case Image_PixMap::ImgBGRA: |
231 | { |
232 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
233 | { |
234 | return false; |
235 | } |
a577aaab |
236 | myTextFormat = GL_RGBA8; |
237 | aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT |
238 | aDataType = GL_UNSIGNED_BYTE; |
bf75be98 |
239 | break; |
240 | } |
241 | case Image_PixMap::ImgRGB32: |
242 | { |
a577aaab |
243 | myTextFormat = GL_RGB8; |
244 | aPixelFormat = GL_RGBA; |
245 | aDataType = GL_UNSIGNED_BYTE; |
bf75be98 |
246 | break; |
247 | } |
248 | case Image_PixMap::ImgBGR32: |
249 | { |
250 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
251 | { |
252 | return false; |
253 | } |
a577aaab |
254 | myTextFormat = GL_RGB8; |
255 | aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT |
256 | aDataType = GL_UNSIGNED_BYTE; |
bf75be98 |
257 | break; |
258 | } |
259 | case Image_PixMap::ImgRGB: |
260 | { |
a577aaab |
261 | myTextFormat = GL_RGB8; |
262 | aPixelFormat = GL_RGB; |
263 | aDataType = GL_UNSIGNED_BYTE; |
bf75be98 |
264 | break; |
265 | } |
266 | case Image_PixMap::ImgBGR: |
267 | { |
268 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
269 | { |
270 | return false; |
271 | } |
a577aaab |
272 | myTextFormat = GL_RGB8; |
273 | aPixelFormat = GL_BGR; // equals to GL_BGR_EXT |
274 | aDataType = GL_UNSIGNED_BYTE; |
bf75be98 |
275 | break; |
276 | } |
277 | case Image_PixMap::ImgGray: |
278 | { |
a577aaab |
279 | myTextFormat = GL_ALPHA8; // GL_R8 |
280 | aPixelFormat = GL_ALPHA; // GL_RED |
281 | aDataType = GL_UNSIGNED_BYTE; |
bf75be98 |
282 | break; |
283 | } |
284 | default: |
285 | { |
286 | return false; |
287 | } |
288 | } |
289 | |
290 | const GLsizei aMaxSize = theCtx->MaxTextureSize(); |
291 | const GLsizei aWidth = (GLsizei )theImage.SizeX(); |
292 | const GLsizei aHeight = (GLsizei )theImage.SizeY(); |
293 | |
294 | // Notice that formally general NPOT textures are required by OpenGL 2.0 specifications |
295 | // however some hardware (NV30 - GeForce FX, RadeOn 9xxx and Xxxx) supports GLSL but not NPOT! |
68333c8f |
296 | // Trying to create NPOT textures on such hardware will not fail |
bf75be98 |
297 | // but driver will fall back into software rendering, |
298 | const bool toForceP2 = !theCtx->IsGlGreaterEqual (3, 0) && !theCtx->arbNPTW; |
a174a3c5 |
299 | const GLsizei aWidthOut = toForceP2 ? OpenGl_Context::GetPowerOfTwo (aWidth, aMaxSize) : Min (aWidth, aMaxSize); |
300 | const GLsizei aHeightOut = toForceP2 ? OpenGl_Context::GetPowerOfTwo (aHeight, aMaxSize) : Min (aHeight, aMaxSize); |
bf75be98 |
301 | |
302 | GLint aTestWidth = 0; |
303 | GLint aTestHeight = 0; |
304 | |
74706083 |
305 | // setup the alignment |
306 | OpenGl_UnpackAlignmentSentry anUnpackSentry; |
307 | const GLint anAligment = Min ((GLint )theImage.MaxRowAligmentBytes(), 8); // OpenGL supports alignment upto 8 bytes |
308 | glPixelStorei (GL_UNPACK_ALIGNMENT, anAligment); |
309 | |
310 | // notice that GL_UNPACK_ROW_LENGTH is not available on OpenGL ES 2.0 without GL_EXT_unpack_subimage extension |
311 | const GLint anExtraBytes = GLint(theImage.RowExtraBytes()); |
312 | const GLint aPixelsWidth = GLint(theImage.SizeRowBytes() / theImage.SizePixelBytes()); |
313 | glPixelStorei (GL_UNPACK_ROW_LENGTH, (anExtraBytes >= anAligment) ? aPixelsWidth : 0); |
314 | |
bf75be98 |
315 | switch (theType) |
316 | { |
317 | case Graphic3d_TOT_1D: |
318 | { |
319 | myTarget = GL_TEXTURE_1D; |
320 | Bind (theCtx); |
321 | glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
322 | glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
323 | |
324 | Image_PixMap aCopy; |
325 | GLvoid* aDataPtr = (GLvoid* )theImage.Data(); |
326 | if (aWidth != aWidthOut) |
327 | { |
74706083 |
328 | glPixelStorei (GL_PACK_ALIGNMENT, 1); |
329 | glPixelStorei (GL_PACK_ROW_LENGTH, 0); |
bf75be98 |
330 | if (!aCopy.InitTrash (theImage.Format(), Standard_Size(aWidthOut), 1) |
331 | || gluScaleImage (aPixelFormat, |
332 | aWidth, 1, aDataType, theImage.Data(), |
333 | aWidthOut, 1, aDataType, aCopy.ChangeData()) != 0) |
334 | { |
335 | Unbind (theCtx); |
336 | return false; |
337 | } |
338 | |
339 | aDataPtr = (GLvoid* )aCopy.Data(); |
74706083 |
340 | anUnpackSentry.Reset(); |
bf75be98 |
341 | } |
342 | |
343 | // use proxy to check texture could be created or not |
a577aaab |
344 | glTexImage1D (GL_PROXY_TEXTURE_1D, 0, myTextFormat, |
bf75be98 |
345 | aWidthOut, 0, |
346 | aPixelFormat, aDataType, NULL); |
347 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
348 | if (aTestWidth == 0) |
349 | { |
350 | // no memory or broken input parameters |
351 | Unbind (theCtx); |
352 | return false; |
353 | } |
354 | |
a577aaab |
355 | glTexImage1D (GL_TEXTURE_1D, 0, myTextFormat, |
bf75be98 |
356 | aWidthOut, 0, |
357 | aPixelFormat, aDataType, aDataPtr); |
a174a3c5 |
358 | if (glGetError() != GL_NO_ERROR) |
359 | { |
360 | Unbind (theCtx); |
361 | return false; |
362 | } |
363 | |
364 | mySizeX = aWidthOut; |
365 | mySizeY = 1; |
bf75be98 |
366 | |
367 | Unbind (theCtx); |
368 | return true; |
369 | } |
370 | case Graphic3d_TOT_2D: |
371 | { |
372 | myTarget = GL_TEXTURE_2D; |
373 | Bind (theCtx); |
374 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
375 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
376 | |
377 | Image_PixMap aCopy; |
378 | GLvoid* aDataPtr = (GLvoid* )theImage.Data(); |
379 | if (aWidth != aWidthOut || aHeight != aHeightOut) |
380 | { |
381 | // scale texture |
74706083 |
382 | glPixelStorei (GL_PACK_ALIGNMENT, 1); |
383 | glPixelStorei (GL_PACK_ROW_LENGTH, 0); |
bf75be98 |
384 | if (!aCopy.InitTrash (theImage.Format(), Standard_Size(aWidthOut), Standard_Size(aHeightOut)) |
385 | || gluScaleImage (aPixelFormat, |
386 | aWidth, aHeight, aDataType, theImage.Data(), |
387 | aWidthOut, aHeightOut, aDataType, aCopy.ChangeData()) != 0) |
388 | { |
389 | Unbind (theCtx); |
390 | return false; |
391 | } |
392 | |
393 | aDataPtr = (GLvoid* )aCopy.Data(); |
74706083 |
394 | anUnpackSentry.Reset(); |
bf75be98 |
395 | } |
396 | |
397 | // use proxy to check texture could be created or not |
a577aaab |
398 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, myTextFormat, |
bf75be98 |
399 | aWidthOut, aHeightOut, 0, |
400 | aPixelFormat, aDataType, NULL); |
401 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
402 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
403 | if (aTestWidth == 0 || aTestHeight == 0) |
404 | { |
405 | // no memory or broken input parameters |
406 | Unbind (theCtx); |
407 | return false; |
408 | } |
409 | |
a577aaab |
410 | glTexImage2D (GL_TEXTURE_2D, 0, myTextFormat, |
bf75be98 |
411 | aWidthOut, aHeightOut, 0, |
412 | aPixelFormat, aDataType, aDataPtr); |
a174a3c5 |
413 | if (glGetError() != GL_NO_ERROR) |
414 | { |
415 | Unbind (theCtx); |
416 | return false; |
417 | } |
418 | |
419 | mySizeX = aWidthOut; |
420 | mySizeY = aHeightOut; |
bf75be98 |
421 | |
422 | Unbind (theCtx); |
423 | return true; |
424 | } |
425 | case Graphic3d_TOT_2D_MIPMAP: |
426 | { |
427 | myTarget = GL_TEXTURE_2D; |
428 | myHasMipmaps = Standard_True; |
429 | Bind (theCtx); |
430 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); |
431 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
432 | |
01ca42b2 |
433 | if (theCtx->arbFBO != NULL |
1a7dfdb7 |
434 | && aWidth == aWidthOut && aHeight == aHeightOut) |
435 | { |
436 | // use proxy to check texture could be created or not |
a577aaab |
437 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, myTextFormat, |
1a7dfdb7 |
438 | aWidthOut, aHeightOut, 0, |
439 | aPixelFormat, aDataType, NULL); |
440 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
441 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
442 | if (aTestWidth == 0 || aTestHeight == 0) |
443 | { |
444 | // no memory or broken input parameters |
445 | Unbind (theCtx); |
446 | return false; |
447 | } |
448 | |
449 | // upload main picture |
a577aaab |
450 | glTexImage2D (GL_TEXTURE_2D, 0, myTextFormat, |
1a7dfdb7 |
451 | aWidthOut, aHeightOut, 0, |
452 | aPixelFormat, aDataType, theImage.Data()); |
a174a3c5 |
453 | if (glGetError() != GL_NO_ERROR) |
454 | { |
455 | Unbind (theCtx); |
456 | return false; |
457 | } |
458 | |
459 | mySizeX = aWidthOut; |
460 | mySizeY = aHeightOut; |
1a7dfdb7 |
461 | |
462 | // generate mipmaps |
463 | //glHint (GL_GENERATE_MIPMAP_HINT, GL_NICEST); |
01ca42b2 |
464 | theCtx->arbFBO->glGenerateMipmap (GL_TEXTURE_2D); |
1a7dfdb7 |
465 | |
466 | Unbind (theCtx); |
467 | return true; |
468 | } |
469 | else |
470 | { |
a577aaab |
471 | bool isCreated = gluBuild2DMipmaps (GL_TEXTURE_2D, myTextFormat, |
1a7dfdb7 |
472 | aWidth, aHeight, |
473 | aPixelFormat, aDataType, theImage.Data()) == 0; |
a174a3c5 |
474 | if (isCreated) |
475 | { |
476 | glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &mySizeX); |
477 | glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &mySizeY); |
478 | } |
479 | |
1a7dfdb7 |
480 | Unbind (theCtx); |
481 | return isCreated; |
482 | } |
bf75be98 |
483 | } |
484 | default: |
485 | { |
486 | return false; |
487 | } |
488 | } |
489 | } |
68333c8f |
490 | |
491 | // ======================================================================= |
492 | // function : InitRectangle |
493 | // purpose : |
494 | // ======================================================================= |
495 | bool OpenGl_Texture::InitRectangle (const Handle(OpenGl_Context)& theCtx, |
496 | const Standard_Integer theSizeX, |
497 | const Standard_Integer theSizeY, |
498 | const OpenGl_TextureFormat& theFormat) |
499 | { |
500 | if (!Create (theCtx) || !theCtx->IsGlGreaterEqual (3, 0)) |
501 | { |
502 | return false; |
503 | } |
504 | |
505 | myTarget = GL_TEXTURE_RECTANGLE; |
506 | |
507 | const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX); |
508 | const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY); |
509 | |
510 | Bind (theCtx); |
511 | |
512 | if (myParams->Filter() == Graphic3d_TOTF_NEAREST) |
513 | { |
514 | glTexParameteri (myTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
515 | glTexParameteri (myTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
516 | } |
517 | else |
518 | { |
519 | glTexParameteri (myTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
520 | glTexParameteri (myTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
521 | } |
522 | |
523 | myTextFormat = theFormat.Internal(); |
524 | |
525 | glTexImage2D (GL_PROXY_TEXTURE_RECTANGLE, |
526 | 0, |
527 | myTextFormat, |
528 | aSizeX, |
529 | aSizeY, |
530 | 0, |
531 | theFormat.Format(), |
532 | GL_FLOAT, |
533 | NULL); |
534 | |
535 | GLint aTestSizeX = 0; |
536 | GLint aTestSizeY = 0; |
537 | |
538 | glGetTexLevelParameteriv ( |
539 | GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_WIDTH, &aTestSizeX); |
540 | glGetTexLevelParameteriv ( |
541 | GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_HEIGHT, &aTestSizeY); |
542 | |
543 | if (aTestSizeX == 0 || aTestSizeY == 0) |
544 | { |
545 | Unbind (theCtx); |
546 | return false; |
547 | } |
548 | |
549 | glTexImage2D (myTarget, |
550 | 0, |
551 | myTextFormat, |
552 | aSizeX, |
553 | aSizeY, |
554 | 0, |
555 | theFormat.Format(), |
556 | GL_FLOAT, |
557 | NULL); |
558 | |
559 | if (glGetError() != GL_NO_ERROR) |
560 | { |
561 | Unbind (theCtx); |
562 | return false; |
563 | } |
564 | |
565 | mySizeX = aSizeX; |
566 | mySizeY = aSizeY; |
567 | |
568 | Unbind (theCtx); |
569 | return true; |
570 | } |