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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_TextureBufferArb.hxx> |
16 | |
17 | #include <OpenGl_Context.hxx> |
18 | #include <Standard_Assert.hxx> |
19 | |
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20 | |
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21 | IMPLEMENT_STANDARD_RTTIEXT(OpenGl_TextureBufferArb,OpenGl_VertexBuffer) |
22 | |
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23 | // ======================================================================= |
24 | // function : OpenGl_TextureBufferArb |
25 | // purpose : |
26 | // ======================================================================= |
27 | OpenGl_TextureBufferArb::OpenGl_TextureBufferArb() |
28 | : OpenGl_VertexBuffer(), |
29 | myTextureId (NO_TEXTURE), |
30 | myTexFormat (GL_RGBA32F) |
31 | { |
32 | // |
33 | } |
34 | |
35 | // ======================================================================= |
36 | // function : ~OpenGl_TextureBufferArb |
37 | // purpose : |
38 | // ======================================================================= |
39 | OpenGl_TextureBufferArb::~OpenGl_TextureBufferArb() |
40 | { |
41 | Release (NULL); |
42 | } |
43 | |
44 | // ======================================================================= |
45 | // function : GetTarget |
46 | // purpose : |
47 | // ======================================================================= |
48 | GLenum OpenGl_TextureBufferArb::GetTarget() const |
49 | { |
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50 | return GL_TEXTURE_BUFFER; // GL_TEXTURE_BUFFER for OpenGL 3.1+, OpenGL ES 3.2 |
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51 | } |
52 | |
53 | // ======================================================================= |
54 | // function : Release |
55 | // purpose : |
56 | // ======================================================================= |
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57 | void OpenGl_TextureBufferArb::Release (OpenGl_Context* theGlCtx) |
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58 | { |
59 | if (myTextureId != NO_TEXTURE) |
60 | { |
61 | // application can not handle this case by exception - this is bug in code |
62 | Standard_ASSERT_RETURN (theGlCtx != NULL, |
63 | "OpenGl_TextureBufferExt destroyed without GL context! Possible GPU memory leakage...",); |
64 | |
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65 | if (theGlCtx->IsValid()) |
66 | { |
67 | glDeleteTextures (1, &myTextureId); |
68 | } |
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69 | myTextureId = NO_TEXTURE; |
70 | } |
71 | OpenGl_VertexBuffer::Release (theGlCtx); |
72 | } |
73 | |
74 | // ======================================================================= |
75 | // function : Create |
76 | // purpose : |
77 | // ======================================================================= |
78 | bool OpenGl_TextureBufferArb::Create (const Handle(OpenGl_Context)& theGlCtx) |
79 | { |
80 | if (!OpenGl_VertexBuffer::Create (theGlCtx)) |
81 | { |
82 | return false; |
83 | } |
84 | |
85 | if (myTextureId == NO_TEXTURE) |
86 | { |
87 | glGenTextures (1, &myTextureId); |
88 | } |
89 | return myTextureId != NO_TEXTURE; |
90 | } |
91 | |
92 | // ======================================================================= |
93 | // function : Init |
94 | // purpose : |
95 | // ======================================================================= |
96 | bool OpenGl_TextureBufferArb::Init (const Handle(OpenGl_Context)& theGlCtx, |
97 | const GLuint theComponentsNb, |
98 | const GLsizei theElemsNb, |
99 | const GLfloat* theData) |
100 | { |
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101 | if (theGlCtx->arbTBO == NULL) |
102 | { |
103 | return false; |
104 | } |
105 | else if (theComponentsNb < 1 |
106 | || theComponentsNb > 4) |
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107 | { |
108 | // unsupported format |
109 | return false; |
110 | } |
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111 | else if (theComponentsNb == 3 |
112 | && !theGlCtx->arbTboRGB32) |
113 | { |
114 | return false; |
115 | } |
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116 | else if (!Create (theGlCtx) |
117 | || !OpenGl_VertexBuffer::Init (theGlCtx, theComponentsNb, theElemsNb, theData)) |
118 | { |
119 | return false; |
120 | } |
121 | |
122 | switch (theComponentsNb) |
123 | { |
124 | case 1: myTexFormat = GL_R32F; break; |
125 | case 2: myTexFormat = GL_RG32F; break; |
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126 | case 3: myTexFormat = GL_RGB32F; break; // GL_ARB_texture_buffer_object_rgb32 |
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127 | case 4: myTexFormat = GL_RGBA32F; break; |
128 | } |
129 | |
130 | Bind (theGlCtx); |
131 | BindTexture (theGlCtx); |
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132 | theGlCtx->arbTBO->glTexBuffer (GetTarget(), myTexFormat, myBufferId); |
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133 | UnbindTexture (theGlCtx); |
134 | Unbind (theGlCtx); |
135 | return true; |
136 | } |
137 | |
138 | // ======================================================================= |
139 | // function : Init |
140 | // purpose : |
141 | // ======================================================================= |
142 | bool OpenGl_TextureBufferArb::Init (const Handle(OpenGl_Context)& theGlCtx, |
143 | const GLuint theComponentsNb, |
144 | const GLsizei theElemsNb, |
145 | const GLuint* theData) |
146 | { |
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147 | if (theGlCtx->arbTBO == NULL) |
148 | { |
149 | return false; |
150 | } |
151 | else if (theComponentsNb < 1 |
152 | || theComponentsNb > 4) |
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153 | { |
154 | // unsupported format |
155 | return false; |
156 | } |
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157 | else if (theComponentsNb == 3 |
158 | && !theGlCtx->arbTboRGB32) |
159 | { |
160 | return false; |
161 | } |
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162 | else if (!Create (theGlCtx) |
163 | || !OpenGl_VertexBuffer::Init (theGlCtx, theComponentsNb, theElemsNb, theData)) |
164 | { |
165 | return false; |
166 | } |
167 | |
168 | switch (theComponentsNb) |
169 | { |
170 | case 1: myTexFormat = GL_R32I; break; |
171 | case 2: myTexFormat = GL_RG32I; break; |
172 | case 3: myTexFormat = GL_RGB32I; break; |
173 | case 4: myTexFormat = GL_RGBA32I; break; |
174 | } |
175 | |
176 | Bind (theGlCtx); |
177 | BindTexture (theGlCtx); |
178 | theGlCtx->arbTBO->glTexBuffer (GetTarget(), myTexFormat, myBufferId); |
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179 | UnbindTexture (theGlCtx); |
180 | Unbind (theGlCtx); |
181 | return true; |
182 | } |
183 | |
184 | // ======================================================================= |
185 | // function : Init |
186 | // purpose : |
187 | // ======================================================================= |
188 | bool OpenGl_TextureBufferArb::Init (const Handle(OpenGl_Context)& theGlCtx, |
189 | const GLuint theComponentsNb, |
190 | const GLsizei theElemsNb, |
191 | const GLushort* theData) |
192 | { |
193 | if (theGlCtx->arbTBO == NULL) |
194 | { |
195 | return false; |
196 | } |
197 | else if (theComponentsNb < 1 |
198 | || theComponentsNb > 4) |
199 | { |
200 | // unsupported format |
201 | return false; |
202 | } |
203 | else if (!Create (theGlCtx) |
204 | || !OpenGl_VertexBuffer::Init (theGlCtx, theComponentsNb, theElemsNb, theData)) |
205 | { |
206 | return false; |
207 | } |
208 | |
209 | switch (theComponentsNb) |
210 | { |
211 | case 1: myTexFormat = GL_R16I; break; |
212 | case 2: myTexFormat = GL_RG16I; break; |
213 | case 3: myTexFormat = GL_RGB16I; break; |
214 | case 4: myTexFormat = GL_RGBA16I; break; |
215 | } |
216 | |
217 | Bind (theGlCtx); |
218 | BindTexture (theGlCtx); |
219 | theGlCtx->arbTBO->glTexBuffer (GetTarget(), myTexFormat, myBufferId); |
220 | UnbindTexture (theGlCtx); |
221 | Unbind (theGlCtx); |
222 | return true; |
223 | } |
224 | |
225 | // ======================================================================= |
226 | // function : Init |
227 | // purpose : |
228 | // ======================================================================= |
229 | bool OpenGl_TextureBufferArb::Init (const Handle(OpenGl_Context)& theGlCtx, |
230 | const GLuint theComponentsNb, |
231 | const GLsizei theElemsNb, |
232 | const GLubyte* theData) |
233 | { |
234 | if (theGlCtx->arbTBO == NULL) |
235 | { |
236 | return false; |
237 | } |
238 | else if (theComponentsNb < 1 |
239 | || theComponentsNb > 4) |
240 | { |
241 | // unsupported format |
242 | return false; |
243 | } |
244 | else if (!Create (theGlCtx) |
245 | || !OpenGl_VertexBuffer::Init (theGlCtx, theComponentsNb, theElemsNb, theData)) |
246 | { |
247 | return false; |
248 | } |
249 | |
250 | switch (theComponentsNb) |
251 | { |
252 | case 1: myTexFormat = GL_R8; break; |
253 | case 2: myTexFormat = GL_RG8; break; |
254 | case 3: myTexFormat = GL_RGB8; break; |
255 | case 4: myTexFormat = GL_RGBA8; break; |
256 | } |
257 | |
258 | Bind (theGlCtx); |
259 | BindTexture (theGlCtx); |
260 | theGlCtx->arbTBO->glTexBuffer (GetTarget(), myTexFormat, myBufferId); |
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261 | UnbindTexture (theGlCtx); |
262 | Unbind (theGlCtx); |
263 | return true; |
264 | } |
265 | |
266 | // ======================================================================= |
267 | // function : BindTexture |
268 | // purpose : |
269 | // ======================================================================= |
270 | void OpenGl_TextureBufferArb::BindTexture (const Handle(OpenGl_Context)& theGlCtx, |
271 | const GLenum theTextureUnit) const |
272 | { |
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273 | theGlCtx->core20fwd->glActiveTexture (theTextureUnit); |
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274 | glBindTexture (GetTarget(), myTextureId); |
275 | } |
276 | |
277 | // ======================================================================= |
278 | // function : UnbindTexture |
279 | // purpose : |
280 | // ======================================================================= |
281 | void OpenGl_TextureBufferArb::UnbindTexture (const Handle(OpenGl_Context)& theGlCtx, |
282 | const GLenum theTextureUnit) const |
283 | { |
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284 | theGlCtx->core20fwd->glActiveTexture (theTextureUnit); |
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285 | glBindTexture (GetTarget(), NO_TEXTURE); |
286 | } |