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1 | // Created by: Kirill GAVRILOV |
2 | // Copyright (c) 2012 OPEN CASCADE SAS |
3 | // |
4 | // The content of this file is subject to the Open CASCADE Technology Public |
5 | // License Version 6.5 (the "License"). You may not use the content of this file |
6 | // except in compliance with the License. Please obtain a copy of the License |
7 | // at http://www.opencascade.org and read it completely before using this file. |
8 | // |
9 | // The Initial Developer of the Original Code is Open CASCADE S.A.S., having its |
10 | // main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. |
11 | // |
12 | // The Original Code and all software distributed under the License is |
13 | // distributed on an "AS IS" basis, without warranty of any kind, and the |
14 | // Initial Developer hereby disclaims all such warranties, including without |
15 | // limitation, any warranties of merchantability, fitness for a particular |
16 | // purpose or non-infringement. Please see the License for the specific terms |
17 | // and conditions governing the rights and limitations under the License. |
18 | |
19 | #include <OpenGl_Texture.hxx> |
20 | |
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21 | #include <OpenGl_ExtFBO.hxx> |
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22 | #include <OpenGl_Context.hxx> |
23 | #include <Graphic3d_TextureParams.hxx> |
24 | #include <Standard_Assert.hxx> |
25 | #include <Image_PixMap.hxx> |
26 | |
27 | IMPLEMENT_STANDARD_HANDLE (OpenGl_Texture, OpenGl_Resource) |
28 | IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Texture, OpenGl_Resource) |
29 | |
30 | //! Function for getting power of to number larger or equal to input number. |
31 | //! @param theNumber number to 'power of two' |
32 | //! @param theThreshold upper threshold |
33 | //! @return power of two number |
34 | inline GLsizei getPowerOfTwo (const GLsizei theNumber, |
35 | const GLsizei theThreshold) |
36 | { |
37 | for (GLsizei p2 = 2; p2 <= theThreshold; p2 <<= 1) |
38 | { |
39 | if (theNumber <= p2) |
40 | { |
41 | return p2; |
42 | } |
43 | } |
44 | return theThreshold; |
45 | } |
46 | |
47 | // ======================================================================= |
48 | // function : OpenGl_Texture |
49 | // purpose : |
50 | // ======================================================================= |
51 | OpenGl_Texture::OpenGl_Texture (const Handle(Graphic3d_TextureParams)& theParams) |
52 | : OpenGl_Resource(), |
53 | myTextureId (NO_TEXTURE), |
54 | myTarget (GL_TEXTURE_2D), |
55 | mySizeX (0), |
56 | mySizeY (0), |
57 | myTextFormat (GL_FLOAT), |
58 | myHasMipmaps (Standard_False), |
59 | myParams (theParams) |
60 | { |
61 | if (myParams.IsNull()) |
62 | { |
63 | myParams = new Graphic3d_TextureParams(); |
64 | } |
65 | } |
66 | |
67 | // ======================================================================= |
68 | // function : ~OpenGl_Texture |
69 | // purpose : |
70 | // ======================================================================= |
71 | OpenGl_Texture::~OpenGl_Texture() |
72 | { |
73 | Release (NULL); |
74 | } |
75 | |
76 | // ======================================================================= |
77 | // function : HasMipmaps |
78 | // purpose : |
79 | // ======================================================================= |
80 | const Standard_Boolean OpenGl_Texture::HasMipmaps() const |
81 | { |
82 | return myHasMipmaps; |
83 | } |
84 | |
85 | // ======================================================================= |
86 | // function : GetParams |
87 | // purpose : |
88 | // ======================================================================= |
89 | const Handle(Graphic3d_TextureParams)& OpenGl_Texture::GetParams() const |
90 | { |
91 | return myParams; |
92 | } |
93 | |
94 | // ======================================================================= |
95 | // function : SetParams |
96 | // purpose : |
97 | // ======================================================================= |
98 | void OpenGl_Texture::SetParams (const Handle(Graphic3d_TextureParams)& theParams) |
99 | { |
100 | myParams = theParams; |
101 | } |
102 | |
103 | // ======================================================================= |
104 | // function : Create |
105 | // purpose : |
106 | // ======================================================================= |
107 | bool OpenGl_Texture::Create (const Handle(OpenGl_Context)& ) |
108 | { |
109 | if (myTextureId == NO_TEXTURE) |
110 | { |
111 | glGenTextures (1, &myTextureId); |
112 | } |
113 | return myTextureId != NO_TEXTURE; |
114 | } |
115 | |
116 | // ======================================================================= |
117 | // function : Release |
118 | // purpose : |
119 | // ======================================================================= |
120 | void OpenGl_Texture::Release (const OpenGl_Context* theGlCtx) |
121 | { |
122 | if (myTextureId == NO_TEXTURE) |
123 | { |
124 | return; |
125 | } |
126 | |
127 | // application can not handle this case by exception - this is bug in code |
128 | Standard_ASSERT_RETURN (theGlCtx != NULL, |
129 | "OpenGl_Texture destroyed without GL context! Possible GPU memory leakage...",); |
130 | |
131 | glDeleteTextures (1, &myTextureId); |
132 | myTextureId = NO_TEXTURE; |
133 | mySizeX = mySizeY = 0; |
134 | } |
135 | |
136 | // ======================================================================= |
137 | // function : Bind |
138 | // purpose : |
139 | // ======================================================================= |
140 | void OpenGl_Texture::Bind (const Handle(OpenGl_Context)& theCtx, |
141 | const GLenum theTextureUnit) const |
142 | { |
143 | if (theCtx->IsGlGreaterEqual (1, 3)) |
144 | { |
145 | theCtx->core13->glActiveTexture (theTextureUnit); |
146 | } |
147 | glBindTexture (myTarget, myTextureId); |
148 | } |
149 | |
150 | // ======================================================================= |
151 | // function : Unbind |
152 | // purpose : |
153 | // ======================================================================= |
154 | void OpenGl_Texture::Unbind (const Handle(OpenGl_Context)& theCtx, |
155 | const GLenum theTextureUnit) const |
156 | { |
157 | if (theCtx->IsGlGreaterEqual (1, 3)) |
158 | { |
159 | theCtx->core13->glActiveTexture (theTextureUnit); |
160 | } |
161 | glBindTexture (myTarget, NO_TEXTURE); |
162 | } |
163 | |
164 | // ======================================================================= |
165 | // function : Init |
166 | // purpose : |
167 | // ======================================================================= |
168 | bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx, |
169 | const Image_PixMap& theImage, |
170 | const Graphic3d_TypeOfTexture theType) |
171 | { |
172 | myHasMipmaps = Standard_False; |
173 | if (theImage.IsEmpty() || !Create (theCtx)) |
174 | { |
175 | return false; |
176 | } |
177 | |
178 | GLenum aTextureFormat = GL_RGBA8; |
179 | GLenum aPixelFormat = 0; |
180 | GLenum aDataType = 0; |
181 | switch (theImage.Format()) |
182 | { |
183 | case Image_PixMap::ImgGrayF: |
184 | { |
185 | aTextureFormat = GL_ALPHA8; // GL_R8, GL_R32F |
186 | aPixelFormat = GL_ALPHA; // GL_RED |
187 | aDataType = GL_FLOAT; |
188 | break; |
189 | } |
190 | case Image_PixMap::ImgRGBAF: |
191 | { |
192 | aTextureFormat = GL_RGBA8; // GL_RGBA32F |
193 | aPixelFormat = GL_RGBA; |
194 | aDataType = GL_FLOAT; |
195 | break; |
196 | } |
197 | case Image_PixMap::ImgBGRAF: |
198 | { |
199 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
200 | { |
201 | return false; |
202 | } |
203 | aTextureFormat = GL_RGBA8; // GL_RGBA32F |
204 | aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT |
205 | aDataType = GL_FLOAT; |
206 | break; |
207 | } |
208 | case Image_PixMap::ImgRGBF: |
209 | { |
210 | aTextureFormat = GL_RGB8; // GL_RGB32F |
211 | aPixelFormat = GL_RGB; |
212 | aDataType = GL_FLOAT; |
213 | break; |
214 | } |
215 | case Image_PixMap::ImgBGRF: |
216 | { |
217 | aTextureFormat = GL_RGB8; // GL_RGB32F |
218 | aPixelFormat = GL_BGR; // equals to GL_BGR_EXT |
219 | aDataType = GL_FLOAT; |
220 | break; |
221 | } |
222 | case Image_PixMap::ImgRGBA: |
223 | { |
224 | aTextureFormat = GL_RGBA8; |
225 | aPixelFormat = GL_RGBA; |
226 | aDataType = GL_UNSIGNED_BYTE; |
227 | break; |
228 | } |
229 | case Image_PixMap::ImgBGRA: |
230 | { |
231 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
232 | { |
233 | return false; |
234 | } |
235 | aTextureFormat = GL_RGBA8; |
236 | aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT |
237 | aDataType = GL_UNSIGNED_BYTE; |
238 | break; |
239 | } |
240 | case Image_PixMap::ImgRGB32: |
241 | { |
242 | aTextureFormat = GL_RGB8; |
243 | aPixelFormat = GL_RGBA; |
244 | aDataType = GL_UNSIGNED_BYTE; |
245 | break; |
246 | } |
247 | case Image_PixMap::ImgBGR32: |
248 | { |
249 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
250 | { |
251 | return false; |
252 | } |
253 | aTextureFormat = GL_RGB8; |
254 | aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT |
255 | aDataType = GL_UNSIGNED_BYTE; |
256 | break; |
257 | } |
258 | case Image_PixMap::ImgRGB: |
259 | { |
260 | aTextureFormat = GL_RGB8; |
261 | aPixelFormat = GL_RGB; |
262 | aDataType = GL_UNSIGNED_BYTE; |
263 | break; |
264 | } |
265 | case Image_PixMap::ImgBGR: |
266 | { |
267 | if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra) |
268 | { |
269 | return false; |
270 | } |
271 | aTextureFormat = GL_RGB8; |
272 | aPixelFormat = GL_BGR; // equals to GL_BGR_EXT |
273 | aDataType = GL_UNSIGNED_BYTE; |
274 | break; |
275 | } |
276 | case Image_PixMap::ImgGray: |
277 | { |
278 | aTextureFormat = GL_ALPHA8; // GL_R8 |
279 | aPixelFormat = GL_ALPHA; // GL_RED |
280 | aDataType = GL_UNSIGNED_BYTE; |
281 | break; |
282 | } |
283 | default: |
284 | { |
285 | return false; |
286 | } |
287 | } |
288 | |
289 | const GLsizei aMaxSize = theCtx->MaxTextureSize(); |
290 | const GLsizei aWidth = (GLsizei )theImage.SizeX(); |
291 | const GLsizei aHeight = (GLsizei )theImage.SizeY(); |
292 | |
293 | // Notice that formally general NPOT textures are required by OpenGL 2.0 specifications |
294 | // however some hardware (NV30 - GeForce FX, RadeOn 9xxx and Xxxx) supports GLSL but not NPOT! |
295 | // Trying to create NPOT rextures on such hardware will not fail |
296 | // but driver will fall back into software rendering, |
297 | const bool toForceP2 = !theCtx->IsGlGreaterEqual (3, 0) && !theCtx->arbNPTW; |
298 | const GLsizei aWidthOut = toForceP2 ? getPowerOfTwo (aWidth, aMaxSize) : Min (aWidth, aMaxSize); |
299 | const GLsizei aHeightOut = toForceP2 ? getPowerOfTwo (aHeight, aMaxSize) : Min (aHeight, aMaxSize); |
300 | |
301 | GLint aTestWidth = 0; |
302 | GLint aTestHeight = 0; |
303 | |
304 | glPixelStorei (GL_UNPACK_ALIGNMENT, 1); // ensure alignment will not screw up the party |
305 | switch (theType) |
306 | { |
307 | case Graphic3d_TOT_1D: |
308 | { |
309 | myTarget = GL_TEXTURE_1D; |
310 | Bind (theCtx); |
311 | glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
312 | glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
313 | |
314 | Image_PixMap aCopy; |
315 | GLvoid* aDataPtr = (GLvoid* )theImage.Data(); |
316 | if (aWidth != aWidthOut) |
317 | { |
318 | if (!aCopy.InitTrash (theImage.Format(), Standard_Size(aWidthOut), 1) |
319 | || gluScaleImage (aPixelFormat, |
320 | aWidth, 1, aDataType, theImage.Data(), |
321 | aWidthOut, 1, aDataType, aCopy.ChangeData()) != 0) |
322 | { |
323 | Unbind (theCtx); |
324 | return false; |
325 | } |
326 | |
327 | aDataPtr = (GLvoid* )aCopy.Data(); |
328 | } |
329 | |
330 | // use proxy to check texture could be created or not |
331 | glTexImage1D (GL_PROXY_TEXTURE_1D, 0, aTextureFormat, |
332 | aWidthOut, 0, |
333 | aPixelFormat, aDataType, NULL); |
334 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
335 | if (aTestWidth == 0) |
336 | { |
337 | // no memory or broken input parameters |
338 | Unbind (theCtx); |
339 | return false; |
340 | } |
341 | |
342 | glTexImage1D (GL_TEXTURE_1D, 0, aTextureFormat, |
343 | aWidthOut, 0, |
344 | aPixelFormat, aDataType, aDataPtr); |
345 | |
346 | Unbind (theCtx); |
347 | return true; |
348 | } |
349 | case Graphic3d_TOT_2D: |
350 | { |
351 | myTarget = GL_TEXTURE_2D; |
352 | Bind (theCtx); |
353 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
354 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
355 | |
356 | Image_PixMap aCopy; |
357 | GLvoid* aDataPtr = (GLvoid* )theImage.Data(); |
358 | if (aWidth != aWidthOut || aHeight != aHeightOut) |
359 | { |
360 | // scale texture |
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361 | if (!aCopy.InitTrash (theImage.Format(), Standard_Size(aWidthOut), Standard_Size(aHeightOut)) |
362 | || gluScaleImage (aPixelFormat, |
363 | aWidth, aHeight, aDataType, theImage.Data(), |
364 | aWidthOut, aHeightOut, aDataType, aCopy.ChangeData()) != 0) |
365 | { |
366 | Unbind (theCtx); |
367 | return false; |
368 | } |
369 | |
370 | aDataPtr = (GLvoid* )aCopy.Data(); |
371 | } |
372 | |
373 | // use proxy to check texture could be created or not |
374 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, aTextureFormat, |
375 | aWidthOut, aHeightOut, 0, |
376 | aPixelFormat, aDataType, NULL); |
377 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
378 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
379 | if (aTestWidth == 0 || aTestHeight == 0) |
380 | { |
381 | // no memory or broken input parameters |
382 | Unbind (theCtx); |
383 | return false; |
384 | } |
385 | |
386 | glTexImage2D (GL_TEXTURE_2D, 0, aTextureFormat, |
387 | aWidthOut, aHeightOut, 0, |
388 | aPixelFormat, aDataType, aDataPtr); |
389 | |
390 | Unbind (theCtx); |
391 | return true; |
392 | } |
393 | case Graphic3d_TOT_2D_MIPMAP: |
394 | { |
395 | myTarget = GL_TEXTURE_2D; |
396 | myHasMipmaps = Standard_True; |
397 | Bind (theCtx); |
398 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); |
399 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
400 | |
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401 | if (theCtx->extFBO != NULL |
402 | && aWidth == aWidthOut && aHeight == aHeightOut) |
403 | { |
404 | // use proxy to check texture could be created or not |
405 | glTexImage2D (GL_PROXY_TEXTURE_2D, 0, aTextureFormat, |
406 | aWidthOut, aHeightOut, 0, |
407 | aPixelFormat, aDataType, NULL); |
408 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth); |
409 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight); |
410 | if (aTestWidth == 0 || aTestHeight == 0) |
411 | { |
412 | // no memory or broken input parameters |
413 | Unbind (theCtx); |
414 | return false; |
415 | } |
416 | |
417 | // upload main picture |
418 | glTexImage2D (GL_TEXTURE_2D, 0, aTextureFormat, |
419 | aWidthOut, aHeightOut, 0, |
420 | aPixelFormat, aDataType, theImage.Data()); |
421 | |
422 | // generate mipmaps |
423 | //glHint (GL_GENERATE_MIPMAP_HINT, GL_NICEST); |
424 | theCtx->extFBO->glGenerateMipmapEXT (GL_TEXTURE_2D); |
425 | |
426 | Unbind (theCtx); |
427 | return true; |
428 | } |
429 | else |
430 | { |
431 | bool isCreated = gluBuild2DMipmaps (GL_TEXTURE_2D, aTextureFormat, |
432 | aWidth, aHeight, |
433 | aPixelFormat, aDataType, theImage.Data()) == 0; |
434 | Unbind (theCtx); |
435 | return isCreated; |
436 | } |
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437 | } |
438 | default: |
439 | { |
440 | return false; |
441 | } |
442 | } |
443 | } |