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1 | // Created by: Kirill GAVRILOV |
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2 | // Copyright (c) 2013-2014 OPEN CASCADE SAS |
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3 | // |
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4 | // This file is part of Open CASCADE Technology software library. |
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5 | // |
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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 |
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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. |
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11 | // |
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12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
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14 | |
15 | #include <OpenGl_Texture.hxx> |
16 | |
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17 | #include <OpenGl_ArbFBO.hxx> |
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18 | #include <OpenGl_Context.hxx> |
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19 | #include <OpenGl_GlCore32.hxx> |
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20 | #include <OpenGl_Sampler.hxx> |
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21 | #include <Graphic3d_TextureParams.hxx> |
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22 | #include <TCollection_ExtendedString.hxx> |
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23 | #include <Standard_Assert.hxx> |
24 | #include <Image_PixMap.hxx> |
25 | |
cc8cbabe |
26 | IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Texture, OpenGl_NamedResource) |
92efcf78 |
27 | |
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28 | //! Simple class to reset unpack alignment settings |
29 | struct OpenGl_UnpackAlignmentSentry |
30 | { |
31 | |
32 | //! Reset unpack alignment settings to safe values |
33 | void Reset() |
34 | { |
35 | glPixelStorei (GL_UNPACK_ALIGNMENT, 1); |
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36 | #if !defined(GL_ES_VERSION_2_0) |
74706083 |
37 | glPixelStorei (GL_UNPACK_ROW_LENGTH, 0); |
ca3c13d1 |
38 | #endif |
74706083 |
39 | } |
40 | |
41 | ~OpenGl_UnpackAlignmentSentry() |
42 | { |
43 | Reset(); |
44 | } |
45 | |
46 | }; |
47 | |
bf75be98 |
48 | // ======================================================================= |
49 | // function : OpenGl_Texture |
50 | // purpose : |
51 | // ======================================================================= |
cc8cbabe |
52 | OpenGl_Texture::OpenGl_Texture (const TCollection_AsciiString& theResourceId, |
53 | const Handle(Graphic3d_TextureParams)& theParams) |
54 | : OpenGl_NamedResource (theResourceId), |
55 | mySampler (new OpenGl_Sampler (theParams)), |
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56 | myRevision (0), |
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57 | myTextureId (NO_TEXTURE), |
58 | myTarget (GL_TEXTURE_2D), |
59 | mySizeX (0), |
60 | mySizeY (0), |
74fb257d |
61 | mySizeZ (0), |
8625ef7e |
62 | myTextFormat (GL_RGBA), |
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63 | mySizedFormat(GL_RGBA8), |
64 | myNbSamples (1), |
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65 | myHasMipmaps (Standard_False), |
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66 | myIsAlpha (false) |
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67 | { |
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68 | // |
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69 | } |
70 | |
71 | // ======================================================================= |
72 | // function : ~OpenGl_Texture |
73 | // purpose : |
74 | // ======================================================================= |
75 | OpenGl_Texture::~OpenGl_Texture() |
76 | { |
77 | Release (NULL); |
78 | } |
79 | |
bf75be98 |
80 | // ======================================================================= |
81 | // function : Create |
82 | // purpose : |
83 | // ======================================================================= |
cc8cbabe |
84 | bool OpenGl_Texture::Create (const Handle(OpenGl_Context)& theCtx) |
bf75be98 |
85 | { |
cc8cbabe |
86 | if (myTextureId != NO_TEXTURE) |
87 | { |
88 | return true; |
89 | } |
90 | |
91 | theCtx->core11fwd->glGenTextures (1, &myTextureId); |
bf75be98 |
92 | if (myTextureId == NO_TEXTURE) |
93 | { |
cc8cbabe |
94 | return false; |
bf75be98 |
95 | } |
cc8cbabe |
96 | |
97 | //mySampler->Create (theCtx); // do not create sampler object by default |
98 | return true; |
bf75be98 |
99 | } |
100 | |
101 | // ======================================================================= |
102 | // function : Release |
103 | // purpose : |
104 | // ======================================================================= |
10b9c7df |
105 | void OpenGl_Texture::Release (OpenGl_Context* theGlCtx) |
bf75be98 |
106 | { |
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107 | mySampler->Release (theGlCtx); |
bf75be98 |
108 | if (myTextureId == NO_TEXTURE) |
109 | { |
110 | return; |
111 | } |
112 | |
113 | // application can not handle this case by exception - this is bug in code |
114 | Standard_ASSERT_RETURN (theGlCtx != NULL, |
115 | "OpenGl_Texture destroyed without GL context! Possible GPU memory leakage...",); |
116 | |
ec2eeb2d |
117 | if (theGlCtx->IsValid()) |
118 | { |
119 | glDeleteTextures (1, &myTextureId); |
120 | } |
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121 | myTextureId = NO_TEXTURE; |
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122 | mySizeX = mySizeY = mySizeZ = 0; |
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123 | } |
124 | |
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125 | // ======================================================================= |
126 | // function : applyDefaultSamplerParams |
127 | // purpose : |
128 | // ======================================================================= |
129 | void OpenGl_Texture::applyDefaultSamplerParams (const Handle(OpenGl_Context)& theCtx) |
130 | { |
131 | OpenGl_Sampler::applySamplerParams (theCtx, mySampler->Parameters(), NULL, myTarget, myHasMipmaps); |
132 | if (mySampler->IsValid() && !mySampler->IsImmutable()) |
133 | { |
134 | OpenGl_Sampler::applySamplerParams (theCtx, mySampler->Parameters(), mySampler.get(), myTarget, myHasMipmaps); |
135 | } |
136 | } |
137 | |
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138 | // ======================================================================= |
139 | // function : Bind |
140 | // purpose : |
141 | // ======================================================================= |
142 | void OpenGl_Texture::Bind (const Handle(OpenGl_Context)& theCtx, |
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143 | const Graphic3d_TextureUnit theTextureUnit) const |
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144 | { |
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145 | if (theCtx->core15fwd != NULL) |
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146 | { |
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147 | theCtx->core15fwd->glActiveTexture (GL_TEXTURE0 + theTextureUnit); |
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148 | } |
cc8cbabe |
149 | mySampler->Bind (theCtx, theTextureUnit); |
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150 | glBindTexture (myTarget, myTextureId); |
151 | } |
152 | |
153 | // ======================================================================= |
154 | // function : Unbind |
155 | // purpose : |
156 | // ======================================================================= |
157 | void OpenGl_Texture::Unbind (const Handle(OpenGl_Context)& theCtx, |
cc8cbabe |
158 | const Graphic3d_TextureUnit theTextureUnit) const |
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159 | { |
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160 | if (theCtx->core15fwd != NULL) |
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161 | { |
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162 | theCtx->core15fwd->glActiveTexture (GL_TEXTURE0 + theTextureUnit); |
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163 | } |
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164 | mySampler->Unbind (theCtx, theTextureUnit); |
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165 | glBindTexture (myTarget, NO_TEXTURE); |
166 | } |
167 | |
cc8cbabe |
168 | //======================================================================= |
169 | //function : InitSamplerObject |
170 | //purpose : |
171 | //======================================================================= |
172 | bool OpenGl_Texture::InitSamplerObject (const Handle(OpenGl_Context)& theCtx) |
173 | { |
174 | return myTextureId != NO_TEXTURE |
175 | && mySampler->Init (theCtx, *this); |
176 | } |
177 | |
18f4e8e2 |
178 | //======================================================================= |
179 | //function : GetDataFormat |
180 | //purpose : |
181 | //======================================================================= |
182 | bool OpenGl_Texture::GetDataFormat (const Handle(OpenGl_Context)& theCtx, |
183 | const Image_PixMap& theData, |
184 | GLint& theTextFormat, |
185 | GLenum& thePixelFormat, |
186 | GLenum& theDataType) |
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187 | { |
18f4e8e2 |
188 | theTextFormat = GL_RGBA8; |
189 | thePixelFormat = 0; |
190 | theDataType = 0; |
191 | switch (theData.Format()) |
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192 | { |
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193 | case Image_Format_GrayF: |
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194 | { |
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195 | if (theCtx->core11 == NULL) |
196 | { |
197 | theTextFormat = GL_R8; // GL_R32F |
198 | thePixelFormat = GL_RED; |
199 | } |
200 | else |
201 | { |
a1073ae2 |
202 | #if !defined(GL_ES_VERSION_2_0) |
076ca35c |
203 | theTextFormat = GL_LUMINANCE8; |
a1073ae2 |
204 | #else |
205 | theTextFormat = GL_LUMINANCE; |
206 | #endif |
076ca35c |
207 | thePixelFormat = GL_LUMINANCE; |
208 | } |
209 | theDataType = GL_FLOAT; |
210 | return true; |
211 | } |
dc858f4c |
212 | case Image_Format_AlphaF: |
076ca35c |
213 | { |
214 | if (theCtx->core11 == NULL) |
215 | { |
216 | theTextFormat = GL_R8; // GL_R32F |
217 | thePixelFormat = GL_RED; |
218 | } |
219 | else |
220 | { |
a1073ae2 |
221 | #if !defined(GL_ES_VERSION_2_0) |
076ca35c |
222 | theTextFormat = GL_ALPHA8; |
a1073ae2 |
223 | #else |
224 | theTextFormat = GL_ALPHA; |
225 | #endif |
076ca35c |
226 | thePixelFormat = GL_ALPHA; |
227 | } |
228 | theDataType = GL_FLOAT; |
18f4e8e2 |
229 | return true; |
bf75be98 |
230 | } |
dc858f4c |
231 | case Image_Format_RGBAF: |
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232 | { |
076ca35c |
233 | theTextFormat = GL_RGBA8; // GL_RGBA32F |
18f4e8e2 |
234 | thePixelFormat = GL_RGBA; |
235 | theDataType = GL_FLOAT; |
236 | return true; |
bf75be98 |
237 | } |
dc858f4c |
238 | case Image_Format_BGRAF: |
bf75be98 |
239 | { |
240 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
241 | { |
242 | return false; |
243 | } |
ca3c13d1 |
244 | theTextFormat = GL_RGBA8; // GL_RGBA32F |
245 | thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA |
18f4e8e2 |
246 | theDataType = GL_FLOAT; |
247 | return true; |
bf75be98 |
248 | } |
dc858f4c |
249 | case Image_Format_RGBF: |
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250 | { |
076ca35c |
251 | theTextFormat = GL_RGB8; // GL_RGB32F |
18f4e8e2 |
252 | thePixelFormat = GL_RGB; |
253 | theDataType = GL_FLOAT; |
254 | return true; |
bf75be98 |
255 | } |
dc858f4c |
256 | case Image_Format_BGRF: |
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257 | { |
ca3c13d1 |
258 | #if !defined(GL_ES_VERSION_2_0) |
259 | theTextFormat = GL_RGB8; // GL_RGB32F |
18f4e8e2 |
260 | thePixelFormat = GL_BGR; // equals to GL_BGR_EXT |
261 | theDataType = GL_FLOAT; |
262 | return true; |
ca3c13d1 |
263 | #else |
264 | return false; |
265 | #endif |
bf75be98 |
266 | } |
dc858f4c |
267 | case Image_Format_RGBA: |
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268 | { |
18f4e8e2 |
269 | theTextFormat = GL_RGBA8; |
270 | thePixelFormat = GL_RGBA; |
271 | theDataType = GL_UNSIGNED_BYTE; |
272 | return true; |
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273 | } |
dc858f4c |
274 | case Image_Format_BGRA: |
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275 | { |
177781da |
276 | #if !defined(GL_ES_VERSION_2_0) |
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277 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
278 | { |
279 | return false; |
280 | } |
ca3c13d1 |
281 | theTextFormat = GL_RGBA8; |
177781da |
282 | #else |
283 | if (!theCtx->extBgra) |
284 | { |
285 | return false; |
286 | } |
287 | theTextFormat = GL_BGRA_EXT; |
288 | #endif |
ca3c13d1 |
289 | thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA |
18f4e8e2 |
290 | theDataType = GL_UNSIGNED_BYTE; |
291 | return true; |
bf75be98 |
292 | } |
dc858f4c |
293 | case Image_Format_RGB32: |
bf75be98 |
294 | { |
177781da |
295 | #if !defined(GL_ES_VERSION_2_0) |
296 | // ask driver to convert data to RGB8 to save memory |
297 | theTextFormat = GL_RGB8; |
298 | #else |
299 | // conversion is not supported |
300 | theTextFormat = GL_RGBA8; |
301 | #endif |
18f4e8e2 |
302 | thePixelFormat = GL_RGBA; |
303 | theDataType = GL_UNSIGNED_BYTE; |
304 | return true; |
bf75be98 |
305 | } |
dc858f4c |
306 | case Image_Format_BGR32: |
bf75be98 |
307 | { |
177781da |
308 | #if !defined(GL_ES_VERSION_2_0) |
309 | if (!theCtx->IsGlGreaterEqual(1, 2) && !theCtx->extBgra) |
bf75be98 |
310 | { |
311 | return false; |
312 | } |
ca3c13d1 |
313 | theTextFormat = GL_RGB8; |
177781da |
314 | #else |
315 | if (!theCtx->extBgra) |
316 | { |
317 | return false; |
318 | } |
319 | theTextFormat = GL_BGRA_EXT; |
320 | #endif |
ca3c13d1 |
321 | thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA |
18f4e8e2 |
322 | theDataType = GL_UNSIGNED_BYTE; |
323 | return true; |
bf75be98 |
324 | } |
dc858f4c |
325 | case Image_Format_RGB: |
bf75be98 |
326 | { |
18f4e8e2 |
327 | theTextFormat = GL_RGB8; |
328 | thePixelFormat = GL_RGB; |
329 | theDataType = GL_UNSIGNED_BYTE; |
330 | return true; |
bf75be98 |
331 | } |
dc858f4c |
332 | case Image_Format_BGR: |
bf75be98 |
333 | { |
ca3c13d1 |
334 | #if !defined(GL_ES_VERSION_2_0) |
bf75be98 |
335 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
336 | { |
337 | return false; |
338 | } |
18f4e8e2 |
339 | theTextFormat = GL_RGB8; |
340 | thePixelFormat = GL_BGR; // equals to GL_BGR_EXT |
341 | theDataType = GL_UNSIGNED_BYTE; |
342 | return true; |
ca3c13d1 |
343 | #else |
344 | return false; |
345 | #endif |
bf75be98 |
346 | } |
dc858f4c |
347 | case Image_Format_Gray: |
bf75be98 |
348 | { |
076ca35c |
349 | if (theCtx->core11 == NULL) |
350 | { |
351 | theTextFormat = GL_R8; |
352 | thePixelFormat = GL_RED; |
353 | } |
354 | else |
355 | { |
a1073ae2 |
356 | #if !defined(GL_ES_VERSION_2_0) |
076ca35c |
357 | theTextFormat = GL_LUMINANCE8; |
a1073ae2 |
358 | #else |
359 | theTextFormat = GL_LUMINANCE; |
360 | #endif |
076ca35c |
361 | thePixelFormat = GL_LUMINANCE; |
362 | } |
363 | theDataType = GL_UNSIGNED_BYTE; |
364 | return true; |
365 | } |
dc858f4c |
366 | case Image_Format_Alpha: |
076ca35c |
367 | { |
368 | if (theCtx->core11 == NULL) |
369 | { |
370 | theTextFormat = GL_R8; |
371 | thePixelFormat = GL_RED; |
372 | } |
373 | else |
374 | { |
a1073ae2 |
375 | #if !defined(GL_ES_VERSION_2_0) |
076ca35c |
376 | theTextFormat = GL_ALPHA8; |
a1073ae2 |
377 | #else |
378 | theTextFormat = GL_ALPHA; |
379 | #endif |
076ca35c |
380 | thePixelFormat = GL_ALPHA; |
381 | } |
382 | theDataType = GL_UNSIGNED_BYTE; |
18f4e8e2 |
383 | return true; |
bf75be98 |
384 | } |
dc858f4c |
385 | case Image_Format_UNKNOWN: |
bf75be98 |
386 | { |
387 | return false; |
388 | } |
389 | } |
076ca35c |
390 | return false; |
18f4e8e2 |
391 | } |
bf75be98 |
392 | |
18f4e8e2 |
393 | // ======================================================================= |
394 | // function : Init |
395 | // purpose : |
396 | // ======================================================================= |
397 | bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx, |
398 | const Standard_Integer theTextFormat, |
399 | const GLenum thePixelFormat, |
400 | const GLenum theDataType, |
401 | const Standard_Integer theSizeX, |
402 | const Standard_Integer theSizeY, |
403 | const Graphic3d_TypeOfTexture theType, |
404 | const Image_PixMap* theImage) |
405 | { |
d2edda76 |
406 | #if !defined(GL_ES_VERSION_2_0) |
407 | const GLenum aTarget = theType == Graphic3d_TOT_1D |
408 | ? GL_TEXTURE_1D |
409 | : GL_TEXTURE_2D; |
410 | #else |
411 | const GLenum aTarget = GL_TEXTURE_2D; |
412 | #endif |
413 | const Standard_Boolean toCreateMipMaps = (theType == Graphic3d_TOT_2D_MIPMAP); |
414 | const bool toPatchExisting = IsValid() |
415 | && myTextFormat == thePixelFormat |
416 | && myTarget == aTarget |
417 | && myHasMipmaps == toCreateMipMaps |
418 | && mySizeX == theSizeX |
419 | && (mySizeY == theSizeY || theType == Graphic3d_TOT_1D); |
18f4e8e2 |
420 | if (!Create (theCtx)) |
421 | { |
422 | Release (theCtx.operator->()); |
423 | return false; |
424 | } |
4e1523ef |
425 | |
426 | if (theImage != NULL) |
427 | { |
dc858f4c |
428 | myIsAlpha = theImage->Format() == Image_Format_Alpha |
429 | || theImage->Format() == Image_Format_AlphaF; |
4e1523ef |
430 | } |
431 | else |
432 | { |
433 | myIsAlpha = thePixelFormat == GL_ALPHA; |
434 | } |
435 | |
d2edda76 |
436 | myHasMipmaps = toCreateMipMaps; |
8625ef7e |
437 | myTextFormat = thePixelFormat; |
15669413 |
438 | mySizedFormat = theTextFormat; |
439 | myNbSamples = 1; |
8625ef7e |
440 | #if !defined(GL_ES_VERSION_2_0) |
441 | const GLint anIntFormat = theTextFormat; |
442 | #else |
a1073ae2 |
443 | // ES 2.0 does not support sized formats and format conversions - them detected from data type |
444 | const GLint anIntFormat = theCtx->IsGlGreaterEqual (3, 0) ? theTextFormat : thePixelFormat; |
8625ef7e |
445 | #endif |
bf75be98 |
446 | |
ff6665dc |
447 | if (theDataType == GL_FLOAT && !theCtx->arbTexFloat) |
448 | { |
449 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
450 | "Error: floating-point textures are not supported by hardware."); |
451 | Release (theCtx.operator->()); |
452 | return false; |
453 | } |
454 | |
d2edda76 |
455 | const GLsizei aMaxSize = theCtx->MaxTextureSize(); |
456 | if (theSizeX > aMaxSize |
457 | || theSizeY > aMaxSize) |
fa4dcbe0 |
458 | { |
459 | TCollection_ExtendedString aWarnMessage = TCollection_ExtendedString ("Error: Texture dimension - ") |
d2edda76 |
460 | + theSizeX + "x" + theSizeY + " exceeds hardware limits (" + aMaxSize + "x" + aMaxSize + ")"; |
fa4dcbe0 |
461 | |
462 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
463 | Release (theCtx.operator->()); |
464 | return false; |
465 | } |
466 | #if !defined(GL_ES_VERSION_2_0) |
467 | else if (!theCtx->IsGlGreaterEqual (3, 0) && !theCtx->arbNPTW) |
468 | { |
469 | // Notice that formally general NPOT textures are required by OpenGL 2.0 specifications |
470 | // however some hardware (NV30 - GeForce FX, RadeOn 9xxx and Xxxx) supports GLSL but not NPOT! |
471 | // Trying to create NPOT textures on such hardware will not fail |
472 | // but driver will fall back into software rendering, |
d2edda76 |
473 | const GLsizei aWidthP2 = OpenGl_Context::GetPowerOfTwo (theSizeX, aMaxSize); |
474 | const GLsizei aHeightP2 = OpenGl_Context::GetPowerOfTwo (theSizeY, aMaxSize); |
fa4dcbe0 |
475 | |
d2edda76 |
476 | if (theSizeX != aWidthP2 |
477 | || (theType != Graphic3d_TOT_1D && theSizeY != aHeightP2)) |
fa4dcbe0 |
478 | { |
479 | TCollection_ExtendedString aWarnMessage = |
d2edda76 |
480 | TCollection_ExtendedString ("Error: NPOT Textures (") + theSizeX + "x" + theSizeY + ") are not supported by hardware."; |
fa4dcbe0 |
481 | |
482 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
483 | |
484 | Release (theCtx.operator->()); |
485 | return false; |
486 | } |
487 | } |
488 | #else |
489 | else if (!theCtx->IsGlGreaterEqual (3, 0) && theType == Graphic3d_TOT_2D_MIPMAP) |
490 | { |
491 | // Mipmap NPOT textures are not supported by OpenGL ES 2.0. |
d2edda76 |
492 | const GLsizei aWidthP2 = OpenGl_Context::GetPowerOfTwo (theSizeX, aMaxSize); |
493 | const GLsizei aHeightP2 = OpenGl_Context::GetPowerOfTwo (theSizeY, aMaxSize); |
fa4dcbe0 |
494 | |
d2edda76 |
495 | if (theSizeX != aWidthP2 |
496 | || theSizeY != aHeightP2) |
fa4dcbe0 |
497 | { |
498 | TCollection_ExtendedString aWarnMessage = |
d2edda76 |
499 | TCollection_ExtendedString ("Error: Mipmap NPOT Textures (") + theSizeX + "x" + theSizeY + ") are not supported by OpenGL ES 2.0"; |
fa4dcbe0 |
500 | |
501 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
502 | |
503 | Release (theCtx.operator->()); |
504 | return false; |
505 | } |
506 | } |
507 | #endif |
508 | |
ca3c13d1 |
509 | #if !defined(GL_ES_VERSION_2_0) |
bf75be98 |
510 | GLint aTestWidth = 0; |
511 | GLint aTestHeight = 0; |
ca3c13d1 |
512 | #endif |
18f4e8e2 |
513 | GLvoid* aDataPtr = (theImage != NULL) ? (GLvoid* )theImage->Data() : NULL; |
bf75be98 |
514 | |
74706083 |
515 | // setup the alignment |
516 | OpenGl_UnpackAlignmentSentry anUnpackSentry; |
fa4dcbe0 |
517 | (void)anUnpackSentry; // avoid compiler warning |
518 | |
18f4e8e2 |
519 | if (aDataPtr != NULL) |
520 | { |
521 | const GLint anAligment = Min ((GLint )theImage->MaxRowAligmentBytes(), 8); // OpenGL supports alignment upto 8 bytes |
522 | glPixelStorei (GL_UNPACK_ALIGNMENT, anAligment); |
74706083 |
523 | |
ca3c13d1 |
524 | #if !defined(GL_ES_VERSION_2_0) |
18f4e8e2 |
525 | // notice that GL_UNPACK_ROW_LENGTH is not available on OpenGL ES 2.0 without GL_EXT_unpack_subimage extension |
526 | const GLint anExtraBytes = GLint(theImage->RowExtraBytes()); |
527 | const GLint aPixelsWidth = GLint(theImage->SizeRowBytes() / theImage->SizePixelBytes()); |
528 | glPixelStorei (GL_UNPACK_ROW_LENGTH, (anExtraBytes >= anAligment) ? aPixelsWidth : 0); |
ca3c13d1 |
529 | #endif |
18f4e8e2 |
530 | } |
74706083 |
531 | |
d2edda76 |
532 | myTarget = aTarget; |
bf75be98 |
533 | switch (theType) |
534 | { |
535 | case Graphic3d_TOT_1D: |
536 | { |
ca3c13d1 |
537 | #if !defined(GL_ES_VERSION_2_0) |
bf75be98 |
538 | Bind (theCtx); |
cc8cbabe |
539 | applyDefaultSamplerParams (theCtx); |
d2edda76 |
540 | if (toPatchExisting) |
541 | { |
542 | glTexSubImage1D (GL_TEXTURE_1D, 0, 0, |
543 | theSizeX, thePixelFormat, theDataType, aDataPtr); |
544 | Unbind (theCtx); |
545 | return true; |
546 | } |
bf75be98 |
547 | |
bf75be98 |
548 | // use proxy to check texture could be created or not |
8625ef7e |
549 | glTexImage1D (GL_PROXY_TEXTURE_1D, 0, anIntFormat, |
d2edda76 |
550 | theSizeX, 0, |
18f4e8e2 |
551 | thePixelFormat, theDataType, NULL); |
ff6665dc |
552 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_1D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
15669413 |
553 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_1D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
bf75be98 |
554 | if (aTestWidth == 0) |
555 | { |
556 | // no memory or broken input parameters |
557 | Unbind (theCtx); |
18f4e8e2 |
558 | Release (theCtx.operator->()); |
bf75be98 |
559 | return false; |
560 | } |
561 | |
8625ef7e |
562 | glTexImage1D (GL_TEXTURE_1D, 0, anIntFormat, |
d2edda76 |
563 | theSizeX, 0, |
18f4e8e2 |
564 | thePixelFormat, theDataType, aDataPtr); |
a174a3c5 |
565 | if (glGetError() != GL_NO_ERROR) |
566 | { |
567 | Unbind (theCtx); |
18f4e8e2 |
568 | Release (theCtx.operator->()); |
a174a3c5 |
569 | return false; |
570 | } |
571 | |
d2edda76 |
572 | mySizeX = theSizeX; |
a174a3c5 |
573 | mySizeY = 1; |
bf75be98 |
574 | |
575 | Unbind (theCtx); |
576 | return true; |
ca3c13d1 |
577 | #else |
ff6665dc |
578 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
579 | "Error: 1D textures are not supported by hardware."); |
fa4dcbe0 |
580 | Release (theCtx.operator->()); |
ca3c13d1 |
581 | return false; |
582 | #endif |
bf75be98 |
583 | } |
584 | case Graphic3d_TOT_2D: |
585 | { |
bf75be98 |
586 | Bind (theCtx); |
cc8cbabe |
587 | applyDefaultSamplerParams (theCtx); |
d2edda76 |
588 | if (toPatchExisting) |
589 | { |
590 | glTexSubImage2D (GL_TEXTURE_2D, 0, |
591 | 0, 0, |
592 | theSizeX, theSizeY, |
593 | thePixelFormat, theDataType, aDataPtr); |
594 | Unbind (theCtx); |
595 | return true; |
596 | } |
bf75be98 |
597 | |
ca3c13d1 |
598 | #if !defined(GL_ES_VERSION_2_0) |
bf75be98 |
599 | // use proxy to check texture could be created or not |
8625ef7e |
600 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, anIntFormat, |
d2edda76 |
601 | theSizeX, theSizeY, 0, |
18f4e8e2 |
602 | thePixelFormat, theDataType, NULL); |
bf75be98 |
603 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
604 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
15669413 |
605 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
bf75be98 |
606 | if (aTestWidth == 0 || aTestHeight == 0) |
607 | { |
608 | // no memory or broken input parameters |
609 | Unbind (theCtx); |
18f4e8e2 |
610 | Release (theCtx.operator->()); |
bf75be98 |
611 | return false; |
612 | } |
ca3c13d1 |
613 | #endif |
bf75be98 |
614 | |
8625ef7e |
615 | glTexImage2D (GL_TEXTURE_2D, 0, anIntFormat, |
d2edda76 |
616 | theSizeX, theSizeY, 0, |
18f4e8e2 |
617 | thePixelFormat, theDataType, aDataPtr); |
177781da |
618 | const GLenum anErr = glGetError(); |
619 | if (anErr != GL_NO_ERROR) |
a174a3c5 |
620 | { |
177781da |
621 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
622 | TCollection_AsciiString ("Error: 2D texture ") + theSizeX + "x" + theSizeY |
623 | + " IF: " + int(anIntFormat) + " PF: " + int(thePixelFormat) + " DT: " + int(theDataType) |
624 | + " can not be created with error " + int(anErr) + "."); |
a174a3c5 |
625 | Unbind (theCtx); |
18f4e8e2 |
626 | Release (theCtx.operator->()); |
a174a3c5 |
627 | return false; |
628 | } |
629 | |
d2edda76 |
630 | mySizeX = theSizeX; |
631 | mySizeY = theSizeY; |
bf75be98 |
632 | |
633 | Unbind (theCtx); |
634 | return true; |
635 | } |
636 | case Graphic3d_TOT_2D_MIPMAP: |
637 | { |
bf75be98 |
638 | Bind (theCtx); |
cc8cbabe |
639 | applyDefaultSamplerParams (theCtx); |
d2edda76 |
640 | if (toPatchExisting) |
641 | { |
642 | glTexSubImage2D (GL_TEXTURE_2D, 0, |
643 | 0, 0, |
644 | theSizeX, theSizeY, |
645 | thePixelFormat, theDataType, aDataPtr); |
646 | if (theCtx->arbFBO != NULL) |
647 | { |
648 | // generate mipmaps |
649 | theCtx->arbFBO->glGenerateMipmap (GL_TEXTURE_2D); |
650 | if (glGetError() != GL_NO_ERROR) |
651 | { |
652 | Unbind (theCtx); |
653 | Release (theCtx.operator->()); |
654 | return false; |
655 | } |
656 | } |
657 | |
658 | Unbind (theCtx); |
659 | return true; |
660 | } |
bf75be98 |
661 | |
fa4dcbe0 |
662 | #if !defined(GL_ES_VERSION_2_0) |
663 | // use proxy to check texture could be created or not |
664 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, anIntFormat, |
d2edda76 |
665 | theSizeX, theSizeY, 0, |
fa4dcbe0 |
666 | thePixelFormat, theDataType, NULL); |
667 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
668 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
15669413 |
669 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
fa4dcbe0 |
670 | if (aTestWidth == 0 || aTestHeight == 0) |
671 | { |
672 | // no memory or broken input parameters |
673 | Unbind (theCtx); |
674 | Release (theCtx.operator->()); |
675 | return false; |
676 | } |
677 | #endif |
678 | |
679 | // upload main picture |
680 | glTexImage2D (GL_TEXTURE_2D, 0, anIntFormat, |
d2edda76 |
681 | theSizeX, theSizeY, 0, |
fa4dcbe0 |
682 | thePixelFormat, theDataType, theImage->Data()); |
177781da |
683 | const GLenum aTexImgErr = glGetError(); |
684 | if (aTexImgErr != GL_NO_ERROR) |
1a7dfdb7 |
685 | { |
177781da |
686 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, |
687 | TCollection_AsciiString ("Error: 2D texture ") + theSizeX + "x" + theSizeY |
688 | + " IF: " + int(anIntFormat) + " PF: " + int(thePixelFormat) + " DT: " + int(theDataType) |
689 | + " can not be created with error " + int(aTexImgErr) + "."); |
fa4dcbe0 |
690 | Unbind (theCtx); |
691 | Release (theCtx.operator->()); |
692 | return false; |
693 | } |
694 | |
d2edda76 |
695 | mySizeX = theSizeX; |
696 | mySizeY = theSizeY; |
fa4dcbe0 |
697 | |
698 | if (theCtx->arbFBO != NULL) |
699 | { |
700 | // generate mipmaps |
701 | //glHint (GL_GENERATE_MIPMAP_HINT, GL_NICEST); |
702 | theCtx->arbFBO->glGenerateMipmap (GL_TEXTURE_2D); |
1a7dfdb7 |
703 | |
a174a3c5 |
704 | if (glGetError() != GL_NO_ERROR) |
705 | { |
706 | Unbind (theCtx); |
18f4e8e2 |
707 | Release (theCtx.operator->()); |
a174a3c5 |
708 | return false; |
709 | } |
1a7dfdb7 |
710 | } |
711 | else |
712 | { |
fa4dcbe0 |
713 | const TCollection_ExtendedString aWarnMessage ("Warning: generating mipmaps requires GL_ARB_framebuffer_object extension which is missing."); |
714 | |
3b523c4c |
715 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage); |
a174a3c5 |
716 | |
1a7dfdb7 |
717 | Unbind (theCtx); |
fa4dcbe0 |
718 | Release (theCtx.operator->()); |
ca3c13d1 |
719 | return false; |
1a7dfdb7 |
720 | } |
fa4dcbe0 |
721 | |
722 | Unbind (theCtx); |
723 | return true; |
bf75be98 |
724 | } |
bf75be98 |
725 | } |
d2edda76 |
726 | |
727 | Release (theCtx.operator->()); |
728 | return false; |
bf75be98 |
729 | } |
68333c8f |
730 | |
18f4e8e2 |
731 | // ======================================================================= |
732 | // function : Init |
733 | // purpose : |
734 | // ======================================================================= |
735 | bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx, |
736 | const Image_PixMap& theImage, |
737 | const Graphic3d_TypeOfTexture theType) |
738 | { |
739 | if (theImage.IsEmpty()) |
740 | { |
741 | Release (theCtx.operator->()); |
742 | return false; |
743 | } |
744 | |
745 | GLenum aPixelFormat; |
746 | GLenum aDataType; |
747 | GLint aTextFormat; |
748 | if (!GetDataFormat (theCtx, theImage, aTextFormat, aPixelFormat, aDataType)) |
749 | { |
750 | Release (theCtx.operator->()); |
751 | return false; |
752 | } |
753 | |
754 | return Init (theCtx, |
755 | aTextFormat, aPixelFormat, aDataType, |
756 | (Standard_Integer)theImage.SizeX(), |
757 | (Standard_Integer)theImage.SizeY(), |
758 | theType, &theImage); |
759 | } |
760 | |
3c4b62a4 |
761 | // ======================================================================= |
762 | // function : Init2DMultisample |
763 | // purpose : |
764 | // ======================================================================= |
765 | bool OpenGl_Texture::Init2DMultisample (const Handle(OpenGl_Context)& theCtx, |
766 | const GLsizei theNbSamples, |
767 | const GLint theTextFormat, |
768 | const GLsizei theSizeX, |
769 | const GLsizei theSizeY) |
770 | { |
771 | if (!Create (theCtx) |
772 | || theNbSamples > theCtx->MaxMsaaSamples() |
773 | || theNbSamples < 1) |
774 | { |
775 | return false; |
776 | } |
777 | |
15669413 |
778 | myNbSamples = OpenGl_Context::GetPowerOfTwo (theNbSamples, theCtx->MaxMsaaSamples()); |
3c4b62a4 |
779 | myTarget = GL_TEXTURE_2D_MULTISAMPLE; |
15669413 |
780 | myHasMipmaps = false; |
3c4b62a4 |
781 | if(theSizeX > theCtx->MaxTextureSize() |
782 | || theSizeY > theCtx->MaxTextureSize()) |
783 | { |
784 | return false; |
785 | } |
786 | |
787 | Bind (theCtx); |
788 | //myTextFormat = theTextFormat; |
15669413 |
789 | mySizedFormat = theTextFormat; |
3c4b62a4 |
790 | #if !defined(GL_ES_VERSION_2_0) |
791 | if (theCtx->Functions()->glTexStorage2DMultisample != NULL) |
792 | { |
15669413 |
793 | theCtx->Functions()->glTexStorage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE); |
3c4b62a4 |
794 | } |
795 | else |
796 | { |
15669413 |
797 | theCtx->Functions()->glTexImage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE); |
3c4b62a4 |
798 | } |
799 | #else |
15669413 |
800 | theCtx->Functions() ->glTexStorage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE); |
3c4b62a4 |
801 | #endif |
802 | if (theCtx->core11fwd->glGetError() != GL_NO_ERROR) |
803 | { |
804 | Unbind (theCtx); |
805 | return false; |
806 | } |
807 | |
808 | mySizeX = theSizeX; |
809 | mySizeY = theSizeY; |
810 | |
811 | Unbind (theCtx); |
812 | return true; |
813 | } |
814 | |
68333c8f |
815 | // ======================================================================= |
816 | // function : InitRectangle |
817 | // purpose : |
818 | // ======================================================================= |
819 | bool OpenGl_Texture::InitRectangle (const Handle(OpenGl_Context)& theCtx, |
820 | const Standard_Integer theSizeX, |
821 | const Standard_Integer theSizeY, |
822 | const OpenGl_TextureFormat& theFormat) |
823 | { |
824 | if (!Create (theCtx) || !theCtx->IsGlGreaterEqual (3, 0)) |
825 | { |
826 | return false; |
827 | } |
ca3c13d1 |
828 | |
829 | #if !defined(GL_ES_VERSION_2_0) |
68333c8f |
830 | myTarget = GL_TEXTURE_RECTANGLE; |
15669413 |
831 | myNbSamples = 1; |
832 | myHasMipmaps = false; |
68333c8f |
833 | |
fe3a29bc |
834 | const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX); |
835 | const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY); |
ca3c13d1 |
836 | |
68333c8f |
837 | Bind (theCtx); |
cc8cbabe |
838 | applyDefaultSamplerParams (theCtx); |
68333c8f |
839 | |
15669413 |
840 | myTextFormat = theFormat.Format(); |
841 | mySizedFormat = theFormat.Internal(); |
68333c8f |
842 | |
15669413 |
843 | glTexImage2D (GL_PROXY_TEXTURE_RECTANGLE, 0, mySizedFormat, |
844 | aSizeX, aSizeY, 0, |
845 | myTextFormat, GL_FLOAT, NULL); |
68333c8f |
846 | |
847 | GLint aTestSizeX = 0; |
848 | GLint aTestSizeY = 0; |
849 | |
15669413 |
850 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_WIDTH, &aTestSizeX); |
851 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_HEIGHT, &aTestSizeY); |
852 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
68333c8f |
853 | |
854 | if (aTestSizeX == 0 || aTestSizeY == 0) |
855 | { |
856 | Unbind (theCtx); |
857 | return false; |
858 | } |
859 | |
15669413 |
860 | glTexImage2D (myTarget, 0, mySizedFormat, |
861 | aSizeX, aSizeY, 0, |
862 | myTextFormat, GL_FLOAT, NULL); |
68333c8f |
863 | |
864 | if (glGetError() != GL_NO_ERROR) |
865 | { |
866 | Unbind (theCtx); |
867 | return false; |
868 | } |
869 | |
870 | mySizeX = aSizeX; |
871 | mySizeY = aSizeY; |
872 | |
873 | Unbind (theCtx); |
874 | return true; |
ca3c13d1 |
875 | #else |
20aeeb7b |
876 | (void )theSizeX; |
877 | (void )theSizeY; |
878 | (void )theFormat; |
ca3c13d1 |
879 | return false; |
880 | #endif |
68333c8f |
881 | } |
74fb257d |
882 | |
883 | // ======================================================================= |
884 | // function : Init3D |
885 | // purpose : |
886 | // ======================================================================= |
887 | bool OpenGl_Texture::Init3D (const Handle(OpenGl_Context)& theCtx, |
888 | const GLint theTextFormat, |
889 | const GLenum thePixelFormat, |
890 | const GLenum theDataType, |
891 | const Standard_Integer theSizeX, |
892 | const Standard_Integer theSizeY, |
893 | const Standard_Integer theSizeZ, |
894 | const void* thePixels) |
895 | { |
896 | if (theCtx->Functions()->glTexImage3D == NULL) |
897 | { |
898 | TCollection_ExtendedString aMsg ("Error: three-dimensional textures are not supported by hardware."); |
899 | |
900 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, |
901 | GL_DEBUG_TYPE_ERROR, |
902 | 0, |
903 | GL_DEBUG_SEVERITY_HIGH, |
904 | aMsg); |
905 | |
906 | return false; |
907 | } |
908 | |
909 | if (!Create(theCtx)) |
910 | { |
911 | return false; |
912 | } |
913 | |
914 | myTarget = GL_TEXTURE_3D; |
15669413 |
915 | myNbSamples = 1; |
916 | myHasMipmaps = false; |
74fb257d |
917 | |
918 | const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX); |
919 | const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY); |
920 | const GLsizei aSizeZ = Min (theCtx->MaxTextureSize(), theSizeZ); |
921 | |
922 | Bind (theCtx); |
923 | |
924 | if (theDataType == GL_FLOAT && !theCtx->arbTexFloat) |
925 | { |
926 | TCollection_ExtendedString aMsg ("Error: floating-point textures are not supported by hardware."); |
927 | |
928 | theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, |
929 | GL_DEBUG_TYPE_ERROR, |
930 | 0, |
931 | GL_DEBUG_SEVERITY_HIGH, |
932 | aMsg); |
933 | |
934 | Release (theCtx.operator->()); |
935 | Unbind (theCtx); |
936 | return false; |
937 | } |
938 | |
15669413 |
939 | mySizedFormat = theTextFormat; |
74fb257d |
940 | |
941 | #if !defined (GL_ES_VERSION_2_0) |
15669413 |
942 | theCtx->core15fwd->glTexImage3D (GL_PROXY_TEXTURE_3D, 0, mySizedFormat, |
943 | aSizeX, aSizeY, aSizeZ, 0, |
944 | thePixelFormat, theDataType, NULL); |
74fb257d |
945 | |
946 | GLint aTestSizeX = 0; |
947 | GLint aTestSizeY = 0; |
948 | GLint aTestSizeZ = 0; |
949 | |
950 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &aTestSizeX); |
951 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_HEIGHT, &aTestSizeY); |
952 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_DEPTH, &aTestSizeZ); |
15669413 |
953 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat); |
74fb257d |
954 | |
955 | if (aTestSizeX == 0 || aTestSizeY == 0 || aTestSizeZ == 0) |
956 | { |
957 | Unbind (theCtx); |
958 | Release (theCtx.operator->()); |
959 | return false; |
960 | } |
961 | #endif |
962 | |
cc8cbabe |
963 | applyDefaultSamplerParams (theCtx); |
15669413 |
964 | theCtx->Functions()->glTexImage3D (myTarget, 0, mySizedFormat, |
965 | aSizeX, aSizeY, aSizeZ, 0, |
966 | thePixelFormat, theDataType, thePixels); |
74fb257d |
967 | |
968 | if (glGetError() != GL_NO_ERROR) |
969 | { |
970 | Unbind (theCtx); |
971 | Release (theCtx.operator->()); |
972 | return false; |
973 | } |
974 | |
975 | mySizeX = aSizeX; |
976 | mySizeY = aSizeY; |
977 | mySizeZ = aSizeZ; |
978 | |
979 | Unbind (theCtx); |
980 | return true; |
981 | } |
15669413 |
982 | |
983 | // ======================================================================= |
984 | // function : PixelSizeOfPixelFormat |
985 | // purpose : |
986 | // ======================================================================= |
987 | Standard_Size OpenGl_Texture::PixelSizeOfPixelFormat (Standard_Integer theInternalFormat) |
988 | { |
989 | switch(theInternalFormat) |
990 | { |
991 | // RED variations (GL_RED, OpenGL 3.0+) |
992 | case GL_RED: |
993 | case GL_R8: return 1; |
994 | case GL_R16: return 2; |
995 | case GL_R16F: return 2; |
996 | case GL_R32F: return 4; |
997 | // RGB variations |
998 | case GL_RGB: return 3; |
999 | case GL_RGB8: return 3; |
1000 | case GL_RGB16: return 6; |
1001 | case GL_RGB16F: return 6; |
1002 | case GL_RGB32F: return 12; |
1003 | // RGBA variations |
1004 | case GL_RGBA: return 4; |
1005 | case GL_RGBA8: return 4; |
1006 | case GL_RGB10_A2: return 4; |
1007 | case GL_RGBA12: return 6; |
1008 | case GL_RGBA16: return 8; |
1009 | case GL_RGBA16F: return 8; |
1010 | case GL_RGBA32F: return 16; |
1011 | // |
1012 | case GL_BGRA_EXT: return 4; |
1013 | // ALPHA variations (deprecated) |
1014 | case GL_ALPHA: |
1015 | case GL_ALPHA8: return 1; |
1016 | case GL_ALPHA16: return 2; |
1017 | case GL_LUMINANCE: return 1; |
1018 | case GL_LUMINANCE_ALPHA: return 2; |
1019 | // depth-stencil |
1020 | case GL_DEPTH24_STENCIL8: return 4; |
1021 | case GL_DEPTH32F_STENCIL8: return 8; |
1022 | case GL_DEPTH_COMPONENT16: return 2; |
1023 | case GL_DEPTH_COMPONENT24: return 3; |
1024 | case GL_DEPTH_COMPONENT32F: return 4; |
1025 | } |
1026 | return 0; |
1027 | } |
1028 | |
1029 | // ======================================================================= |
1030 | // function : EstimatedDataSize |
1031 | // purpose : |
1032 | // ======================================================================= |
1033 | Standard_Size OpenGl_Texture::EstimatedDataSize() const |
1034 | { |
1035 | if (!IsValid()) |
1036 | { |
1037 | return 0; |
1038 | } |
1039 | |
1040 | Standard_Size aSize = PixelSizeOfPixelFormat (mySizedFormat) * mySizeX * myNbSamples; |
1041 | if (mySizeY != 0) |
1042 | { |
1043 | aSize *= Standard_Size(mySizeY); |
1044 | } |
1045 | if (mySizeZ != 0) |
1046 | { |
1047 | aSize *= Standard_Size(mySizeZ); |
1048 | } |
1049 | if (myHasMipmaps) |
1050 | { |
1051 | aSize = aSize + aSize / 3; |
1052 | } |
1053 | return aSize; |
1054 | } |