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1 | // Created by: Kirill GAVRILOV |
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2 | // Copyright (c) 2011-2014 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 | |
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15 | #include <OpenGl_FrameBuffer.hxx> |
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16 | #include <OpenGl_ArbFBO.hxx> |
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17 | |
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18 | #include <Standard_Assert.hxx> |
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19 | #include <TCollection_ExtendedString.hxx> |
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20 | |
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21 | IMPLEMENT_STANDARD_RTTIEXT(OpenGl_FrameBuffer,OpenGl_Resource) |
22 | |
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23 | namespace |
24 | { |
25 | |
26 | //! Determine data type from texture sized format. |
27 | static bool getDepthDataFormat (GLint theTextFormat, |
28 | GLenum& thePixelFormat, |
29 | GLenum& theDataType) |
30 | { |
31 | switch (theTextFormat) |
32 | { |
33 | case GL_DEPTH24_STENCIL8: |
34 | { |
35 | thePixelFormat = GL_DEPTH_STENCIL; |
36 | theDataType = GL_UNSIGNED_INT_24_8; |
37 | return true; |
38 | } |
39 | case GL_DEPTH32F_STENCIL8: |
40 | { |
41 | thePixelFormat = GL_DEPTH_STENCIL; |
42 | theDataType = GL_FLOAT_32_UNSIGNED_INT_24_8_REV; |
43 | return true; |
44 | } |
45 | case GL_DEPTH_COMPONENT16: |
46 | { |
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47 | thePixelFormat = GL_DEPTH_COMPONENT; |
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48 | theDataType = GL_UNSIGNED_SHORT; |
49 | return true; |
50 | } |
51 | case GL_DEPTH_COMPONENT24: |
52 | { |
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53 | thePixelFormat = GL_DEPTH_COMPONENT; |
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54 | theDataType = GL_UNSIGNED_INT; |
55 | return true; |
56 | } |
57 | case GL_DEPTH_COMPONENT32F: |
58 | { |
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59 | thePixelFormat = GL_DEPTH_COMPONENT; |
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60 | theDataType = GL_FLOAT; |
61 | return true; |
62 | } |
63 | } |
64 | return false; |
65 | } |
66 | |
67 | } |
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68 | |
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69 | // ======================================================================= |
70 | // function : OpenGl_FrameBuffer |
71 | // purpose : |
72 | // ======================================================================= |
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73 | OpenGl_FrameBuffer::OpenGl_FrameBuffer() |
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74 | : myVPSizeX (0), |
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75 | myVPSizeY (0), |
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76 | myNbSamples (0), |
77 | myColorFormat (GL_RGBA8), |
78 | myDepthFormat (GL_DEPTH24_STENCIL8), |
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79 | myGlFBufferId (NO_FRAMEBUFFER), |
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80 | myGlColorRBufferId (NO_RENDERBUFFER), |
81 | myGlDepthRBufferId (NO_RENDERBUFFER), |
82 | myIsOwnBuffer (false), |
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83 | myColorTexture (new OpenGl_Texture()), |
84 | myDepthStencilTexture (new OpenGl_Texture()) |
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85 | { |
86 | // |
87 | } |
88 | |
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89 | // ======================================================================= |
90 | // function : ~OpenGl_FrameBuffer |
91 | // purpose : |
92 | // ======================================================================= |
93 | OpenGl_FrameBuffer::~OpenGl_FrameBuffer() |
94 | { |
95 | Release (NULL); |
96 | } |
97 | |
98 | // ======================================================================= |
99 | // function : Init |
100 | // purpose : |
101 | // ======================================================================= |
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102 | Standard_Boolean OpenGl_FrameBuffer::Init (const Handle(OpenGl_Context)& theGlContext, |
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103 | const GLsizei theSizeX, |
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104 | const GLsizei theSizeY, |
105 | const GLint theColorFormat, |
106 | const GLint theDepthFormat, |
107 | const GLsizei theNbSamples) |
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108 | { |
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109 | myColorFormat = theColorFormat; |
110 | myDepthFormat = theDepthFormat; |
111 | myNbSamples = theNbSamples; |
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112 | if (theGlContext->arbFBO == NULL) |
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113 | { |
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114 | return Standard_False; |
115 | } |
116 | |
117 | // clean up previous state |
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118 | Release (theGlContext.operator->()); |
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119 | if (myColorFormat == 0 |
120 | && myDepthFormat == 0) |
121 | { |
122 | return Standard_False; |
123 | } |
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124 | |
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125 | myIsOwnBuffer = true; |
126 | |
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127 | // setup viewport sizes as is |
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128 | myVPSizeX = theSizeX; |
129 | myVPSizeY = theSizeY; |
130 | const Standard_Integer aSizeX = theSizeX > 0 ? theSizeX : 2; |
131 | const Standard_Integer aSizeY = theSizeY > 0 ? theSizeY : 2; |
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132 | |
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133 | // Create the textures (will be used as color buffer and depth-stencil buffer) |
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134 | if (theNbSamples != 0) |
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135 | { |
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136 | if (myColorFormat != 0 |
137 | && !myColorTexture ->Init2DMultisample (theGlContext, theNbSamples, myColorFormat, aSizeX, aSizeY)) |
138 | { |
139 | Release (theGlContext.operator->()); |
140 | return Standard_False; |
141 | } |
142 | if (myDepthFormat != 0 |
143 | && !myDepthStencilTexture->Init2DMultisample (theGlContext, theNbSamples, myDepthFormat, aSizeX, aSizeY)) |
144 | { |
145 | Release (theGlContext.operator->()); |
146 | return Standard_False; |
147 | } |
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148 | } |
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149 | else |
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150 | { |
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151 | if (myColorFormat != 0 |
152 | && !myColorTexture->Init (theGlContext, myColorFormat, |
153 | GL_RGBA, GL_UNSIGNED_BYTE, |
154 | aSizeX, aSizeY, Graphic3d_TOT_2D)) |
155 | { |
156 | Release (theGlContext.operator->()); |
157 | return Standard_False; |
158 | } |
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159 | |
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160 | // extensions (GL_OES_packed_depth_stencil, GL_OES_depth_texture) + GL version might be used to determine supported formats |
161 | // instead of just trying to create such texture |
162 | GLenum aPixelFormat = 0; |
163 | GLenum aDataType = 0; |
164 | if (myDepthFormat != 0 |
165 | && getDepthDataFormat (myDepthFormat, aPixelFormat, aDataType) |
166 | && !myDepthStencilTexture->Init (theGlContext, myDepthFormat, |
167 | aPixelFormat, aDataType, |
168 | aSizeX, aSizeY, Graphic3d_TOT_2D)) |
169 | { |
170 | TCollection_ExtendedString aMsg = TCollection_ExtendedString() |
171 | + "Warning! Depth textures are not supported by hardware!"; |
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172 | theGlContext->PushMessage (GL_DEBUG_SOURCE_APPLICATION, |
173 | GL_DEBUG_TYPE_PORTABILITY, |
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174 | 0, |
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175 | GL_DEBUG_SEVERITY_HIGH, |
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176 | aMsg); |
177 | |
178 | theGlContext->arbFBO->glGenRenderbuffers (1, &myGlDepthRBufferId); |
179 | theGlContext->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, myGlDepthRBufferId); |
180 | theGlContext->arbFBO->glRenderbufferStorage (GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, aSizeX, aSizeY); |
181 | theGlContext->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, NO_RENDERBUFFER); |
182 | } |
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183 | } |
184 | |
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185 | // Build FBO and setup it as texture |
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186 | theGlContext->arbFBO->glGenFramebuffers (1, &myGlFBufferId); |
187 | theGlContext->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, myGlFBufferId); |
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188 | if (myColorTexture->IsValid()) |
189 | { |
190 | theGlContext->arbFBO->glFramebufferTexture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, |
191 | myColorTexture->GetTarget(), myColorTexture->TextureId(), 0); |
192 | } |
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193 | if (myDepthStencilTexture->IsValid()) |
194 | { |
195 | #ifdef GL_DEPTH_STENCIL_ATTACHMENT |
196 | theGlContext->arbFBO->glFramebufferTexture2D (GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, |
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197 | myDepthStencilTexture->GetTarget(), myDepthStencilTexture->TextureId(), 0); |
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198 | #else |
199 | theGlContext->arbFBO->glFramebufferTexture2D (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, |
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200 | myDepthStencilTexture->GetTarget(), myDepthStencilTexture->TextureId(), 0); |
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201 | theGlContext->arbFBO->glFramebufferTexture2D (GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, |
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202 | myDepthStencilTexture->GetTarget(), myDepthStencilTexture->TextureId(), 0); |
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203 | #endif |
204 | } |
205 | else if (myGlDepthRBufferId != NO_RENDERBUFFER) |
206 | { |
207 | theGlContext->arbFBO->glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, |
208 | GL_RENDERBUFFER, myGlDepthRBufferId); |
209 | } |
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210 | if (theGlContext->arbFBO->glCheckFramebufferStatus (GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) |
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211 | { |
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212 | Release (theGlContext.operator->()); |
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213 | return Standard_False; |
214 | } |
215 | |
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216 | UnbindBuffer (theGlContext); |
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217 | return Standard_True; |
218 | } |
219 | |
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220 | // ======================================================================= |
221 | // function : Init |
222 | // purpose : |
223 | // ======================================================================= |
224 | Standard_Boolean OpenGl_FrameBuffer::InitLazy (const Handle(OpenGl_Context)& theGlContext, |
225 | const GLsizei theViewportSizeX, |
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226 | const GLsizei theViewportSizeY, |
227 | const GLint theColorFormat, |
228 | const GLint theDepthFormat, |
229 | const GLsizei theNbSamples) |
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230 | { |
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231 | if (myVPSizeX == theViewportSizeX |
232 | && myVPSizeY == theViewportSizeY |
233 | && myColorFormat == theColorFormat |
234 | && myDepthFormat == theDepthFormat |
235 | && myNbSamples == theNbSamples) |
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236 | { |
237 | return IsValid(); |
238 | } |
239 | |
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240 | return Init (theGlContext, theViewportSizeX, theViewportSizeY, theColorFormat, theDepthFormat, theNbSamples); |
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241 | } |
242 | |
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243 | // ======================================================================= |
244 | // function : InitWithRB |
245 | // purpose : |
246 | // ======================================================================= |
247 | Standard_Boolean OpenGl_FrameBuffer::InitWithRB (const Handle(OpenGl_Context)& theGlCtx, |
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248 | const GLsizei theSizeX, |
249 | const GLsizei theSizeY, |
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250 | const GLint theColorFormat, |
251 | const GLint theDepthFormat, |
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252 | const GLuint theColorRBufferFromWindow) |
253 | { |
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254 | myColorFormat = theColorFormat; |
255 | myDepthFormat = theDepthFormat; |
256 | myNbSamples = 0; |
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257 | if (theGlCtx->arbFBO == NULL) |
258 | { |
259 | return Standard_False; |
260 | } |
261 | |
262 | // clean up previous state |
263 | Release (theGlCtx.operator->()); |
264 | |
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265 | myIsOwnBuffer = true; |
266 | |
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267 | // setup viewport sizes as is |
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268 | myVPSizeX = theSizeX; |
269 | myVPSizeY = theSizeY; |
270 | const Standard_Integer aSizeX = theSizeX > 0 ? theSizeX : 2; |
271 | const Standard_Integer aSizeY = theSizeY > 0 ? theSizeY : 2; |
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272 | |
273 | // Create the render-buffers |
274 | if (theColorRBufferFromWindow != NO_RENDERBUFFER) |
275 | { |
276 | myGlColorRBufferId = theColorRBufferFromWindow; |
277 | } |
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278 | else if (myColorFormat != 0) |
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279 | { |
280 | theGlCtx->arbFBO->glGenRenderbuffers (1, &myGlColorRBufferId); |
281 | theGlCtx->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, myGlColorRBufferId); |
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282 | theGlCtx->arbFBO->glRenderbufferStorage (GL_RENDERBUFFER, myColorFormat, aSizeX, aSizeY); |
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283 | } |
284 | |
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285 | if (myDepthFormat != 0) |
286 | { |
287 | theGlCtx->arbFBO->glGenRenderbuffers (1, &myGlDepthRBufferId); |
288 | theGlCtx->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, myGlDepthRBufferId); |
289 | theGlCtx->arbFBO->glRenderbufferStorage (GL_RENDERBUFFER, myDepthFormat, aSizeX, aSizeY); |
290 | theGlCtx->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, NO_RENDERBUFFER); |
291 | } |
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292 | |
293 | // create FBO |
294 | theGlCtx->arbFBO->glGenFramebuffers (1, &myGlFBufferId); |
295 | theGlCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, myGlFBufferId); |
296 | theGlCtx->arbFBO->glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, |
297 | GL_RENDERBUFFER, myGlColorRBufferId); |
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298 | if (myGlDepthRBufferId != NO_RENDERBUFFER) |
299 | { |
300 | #ifdef GL_DEPTH_STENCIL_ATTACHMENT |
301 | theGlCtx->arbFBO->glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, |
302 | GL_RENDERBUFFER, myGlDepthRBufferId); |
303 | #else |
304 | theGlCtx->arbFBO->glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, |
305 | GL_RENDERBUFFER, myGlDepthRBufferId); |
306 | theGlCtx->arbFBO->glFramebufferRenderbuffer (GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, |
307 | GL_RENDERBUFFER, myGlDepthRBufferId); |
308 | #endif |
309 | } |
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310 | if (theGlCtx->arbFBO->glCheckFramebufferStatus (GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) |
311 | { |
312 | UnbindBuffer (theGlCtx); |
313 | Release (theGlCtx.operator->()); |
314 | return Standard_False; |
315 | } |
316 | |
317 | UnbindBuffer (theGlCtx); |
318 | return Standard_True; |
319 | } |
320 | |
321 | // ======================================================================= |
322 | // function : InitWrapper |
323 | // purpose : |
324 | // ======================================================================= |
325 | Standard_Boolean OpenGl_FrameBuffer::InitWrapper (const Handle(OpenGl_Context)& theGlCtx) |
326 | { |
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327 | myNbSamples = 0; |
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328 | if (theGlCtx->arbFBO == NULL) |
329 | { |
330 | return Standard_False; |
331 | } |
332 | |
333 | // clean up previous state |
334 | Release (theGlCtx.operator->()); |
335 | |
336 | GLint anFbo = GLint(NO_FRAMEBUFFER); |
337 | ::glGetIntegerv (GL_FRAMEBUFFER_BINDING, &anFbo); |
338 | if (anFbo == GLint(NO_FRAMEBUFFER)) |
339 | { |
340 | return Standard_False; |
341 | } |
342 | |
343 | GLint aColorType = 0; |
344 | GLint aColorId = 0; |
345 | GLint aDepthType = 0; |
346 | GLint aDepthId = 0; |
347 | theGlCtx->arbFBO->glGetFramebufferAttachmentParameteriv (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &aColorType); |
348 | theGlCtx->arbFBO->glGetFramebufferAttachmentParameteriv (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE, &aDepthType); |
349 | |
350 | myGlFBufferId = GLuint(anFbo); |
351 | myIsOwnBuffer = false; |
352 | if (aColorType == GL_RENDERBUFFER) |
353 | { |
354 | theGlCtx->arbFBO->glGetFramebufferAttachmentParameteriv (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &aColorId); |
355 | myGlColorRBufferId = aColorId; |
356 | } |
357 | else if (aColorType != GL_NONE) |
358 | { |
359 | TCollection_ExtendedString aMsg = "OpenGl_FrameBuffer::InitWrapper(), color attachment of unsupported type has been skipped!"; |
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360 | theGlCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, |
361 | GL_DEBUG_TYPE_ERROR, |
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362 | 0, |
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363 | GL_DEBUG_SEVERITY_HIGH, |
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364 | aMsg); |
365 | } |
366 | |
367 | if (aDepthType == GL_RENDERBUFFER) |
368 | { |
369 | theGlCtx->arbFBO->glGetFramebufferAttachmentParameteriv (GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME, &aDepthId); |
370 | myGlDepthRBufferId = aDepthId; |
371 | } |
372 | else if (aDepthType != GL_NONE) |
373 | { |
374 | TCollection_ExtendedString aMsg = "OpenGl_FrameBuffer::InitWrapper(), depth attachment of unsupported type has been skipped!"; |
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375 | theGlCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, |
376 | GL_DEBUG_TYPE_ERROR, |
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377 | 0, |
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378 | GL_DEBUG_SEVERITY_HIGH, |
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379 | aMsg); |
380 | } |
381 | |
382 | // retrieve dimensions |
383 | GLuint aRBuffer = myGlColorRBufferId != NO_RENDERBUFFER ? myGlColorRBufferId : myGlDepthRBufferId; |
384 | if (aRBuffer != NO_RENDERBUFFER) |
385 | { |
386 | theGlCtx->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, aRBuffer); |
387 | theGlCtx->arbFBO->glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &myVPSizeX); |
388 | theGlCtx->arbFBO->glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &myVPSizeY); |
389 | theGlCtx->arbFBO->glBindRenderbuffer (GL_RENDERBUFFER, NO_RENDERBUFFER); |
390 | } |
391 | |
392 | return aRBuffer != NO_RENDERBUFFER; |
393 | } |
394 | |
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395 | // ======================================================================= |
396 | // function : Release |
397 | // purpose : |
398 | // ======================================================================= |
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399 | void OpenGl_FrameBuffer::Release (OpenGl_Context* theGlCtx) |
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400 | { |
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401 | if (isValidFrameBuffer()) |
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402 | { |
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403 | // application can not handle this case by exception - this is bug in code |
404 | Standard_ASSERT_RETURN (theGlCtx != NULL, |
405 | "OpenGl_FrameBuffer destroyed without GL context! Possible GPU memory leakage...",); |
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406 | if (theGlCtx->IsValid() |
407 | && myIsOwnBuffer) |
2166f0fa |
408 | { |
01ca42b2 |
409 | theGlCtx->arbFBO->glDeleteFramebuffers (1, &myGlFBufferId); |
a2e4f780 |
410 | if (myGlColorRBufferId != NO_RENDERBUFFER) |
411 | { |
412 | theGlCtx->arbFBO->glDeleteRenderbuffers (1, &myGlColorRBufferId); |
413 | } |
414 | if (myGlDepthRBufferId != NO_RENDERBUFFER) |
415 | { |
416 | theGlCtx->arbFBO->glDeleteRenderbuffers (1, &myGlDepthRBufferId); |
417 | } |
2166f0fa |
418 | } |
a2e4f780 |
419 | myGlFBufferId = NO_FRAMEBUFFER; |
420 | myGlColorRBufferId = NO_RENDERBUFFER; |
421 | myGlDepthRBufferId = NO_RENDERBUFFER; |
422 | myIsOwnBuffer = false; |
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423 | } |
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424 | |
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425 | myColorTexture->Release (theGlCtx); |
426 | myDepthStencilTexture->Release (theGlCtx); |
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427 | |
428 | myVPSizeX = 0; |
429 | myVPSizeY = 0; |
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430 | } |
431 | |
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432 | // ======================================================================= |
433 | // function : SetupViewport |
434 | // purpose : |
435 | // ======================================================================= |
436 | void OpenGl_FrameBuffer::SetupViewport (const Handle(OpenGl_Context)& /*theGlCtx*/) |
437 | { |
438 | glViewport (0, 0, myVPSizeX, myVPSizeY); |
439 | } |
440 | |
441 | // ======================================================================= |
442 | // function : ChangeViewport |
443 | // purpose : |
444 | // ======================================================================= |
445 | void OpenGl_FrameBuffer::ChangeViewport (const GLsizei theVPSizeX, |
446 | const GLsizei theVPSizeY) |
447 | { |
448 | myVPSizeX = theVPSizeX; |
449 | myVPSizeY = theVPSizeY; |
450 | } |
451 | |
452 | // ======================================================================= |
453 | // function : BindBuffer |
454 | // purpose : |
455 | // ======================================================================= |
456 | void OpenGl_FrameBuffer::BindBuffer (const Handle(OpenGl_Context)& theGlCtx) |
457 | { |
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458 | theGlCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, myGlFBufferId); |
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459 | } |
460 | |
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461 | // ======================================================================= |
462 | // function : BindDrawBuffer |
463 | // purpose : |
464 | // ======================================================================= |
465 | void OpenGl_FrameBuffer::BindDrawBuffer (const Handle(OpenGl_Context)& theGlCtx) |
466 | { |
467 | theGlCtx->arbFBO->glBindFramebuffer (GL_DRAW_FRAMEBUFFER, myGlFBufferId); |
468 | } |
469 | |
470 | // ======================================================================= |
471 | // function : BindReadBuffer |
472 | // purpose : |
473 | // ======================================================================= |
474 | void OpenGl_FrameBuffer::BindReadBuffer (const Handle(OpenGl_Context)& theGlCtx) |
475 | { |
476 | theGlCtx->arbFBO->glBindFramebuffer (GL_READ_FRAMEBUFFER, myGlFBufferId); |
477 | } |
478 | |
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479 | // ======================================================================= |
480 | // function : UnbindBuffer |
481 | // purpose : |
482 | // ======================================================================= |
483 | void OpenGl_FrameBuffer::UnbindBuffer (const Handle(OpenGl_Context)& theGlCtx) |
484 | { |
a2e4f780 |
485 | if (!theGlCtx->DefaultFrameBuffer().IsNull() |
486 | && theGlCtx->DefaultFrameBuffer().operator->() != this) |
487 | { |
488 | theGlCtx->DefaultFrameBuffer()->BindBuffer (theGlCtx); |
489 | } |
490 | else |
491 | { |
492 | theGlCtx->arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, NO_FRAMEBUFFER); |
493 | } |
fd4a6963 |
494 | } |