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b311480e | 1 | // Created by: Kirill GAVRILOV |
2 | // Copyright (c) 2011-2012 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 | ||
2166f0fa | 19 | |
7fd59977 | 20 | #include <OpenGl_FrameBuffer.hxx> |
21 | ||
22 | #ifdef DEB | |
23 | #include <iostream> | |
24 | #endif | |
25 | ||
7fd59977 | 26 | static inline bool isOddNumber (const GLsizei theNumber) |
27 | { | |
28 | return theNumber & 0x01; | |
29 | } | |
30 | ||
31 | static inline GLsizei getEvenNumber (const GLsizei theNumber) | |
32 | { | |
33 | return isOddNumber (theNumber) ? (theNumber + 1) : theNumber; | |
34 | } | |
35 | ||
36 | //! Notice - 0 is not power of two here | |
37 | static inline bool isPowerOfTwo (const GLsizei theNumber) | |
38 | { | |
39 | return !(theNumber & (theNumber - 1)); | |
40 | } | |
41 | ||
7fd59977 | 42 | OpenGl_FrameBuffer::OpenGl_FrameBuffer (GLint theTextureFormat) |
43 | : mySizeX (0), | |
44 | mySizeY (0), | |
45 | myVPSizeX (0), | |
46 | myVPSizeY (0), | |
47 | myTextFormat (theTextureFormat), | |
48 | myGlTextureId (NO_TEXTURE), | |
49 | myGlFBufferId (NO_FRAMEBUFFER), | |
b859a34d | 50 | myGlDepthRBId (NO_RENDERBUFFER), |
51 | myGlStencilRBId (NO_RENDERBUFFER) | |
7fd59977 | 52 | { |
53 | // | |
54 | } | |
55 | ||
2166f0fa SK |
56 | Standard_Boolean OpenGl_FrameBuffer::Init (const Handle(OpenGl_Context)& theGlContext, |
57 | GLsizei theViewportSizeX, | |
7fd59977 | 58 | GLsizei theViewportSizeY, |
59 | GLboolean toForcePowerOfTwo) | |
60 | { | |
2166f0fa | 61 | if (theGlContext->extFBO == NULL) |
7fd59977 | 62 | { |
63 | #ifdef DEB | |
64 | std::cerr << "OpenGl_FrameBuffer, FBO extension not supported!\n"; | |
65 | #endif | |
66 | return Standard_False; | |
67 | } | |
68 | ||
69 | // clean up previous state | |
2166f0fa | 70 | Release (theGlContext); |
7fd59977 | 71 | |
72 | // upscale width/height if numbers are odd | |
73 | if (toForcePowerOfTwo) | |
74 | { | |
a174a3c5 | 75 | mySizeX = OpenGl_Context::GetPowerOfTwo (theViewportSizeX, theGlContext->MaxTextureSize()); |
76 | mySizeY = OpenGl_Context::GetPowerOfTwo (theViewportSizeY, theGlContext->MaxTextureSize()); | |
7fd59977 | 77 | } |
78 | else | |
79 | { | |
80 | mySizeX = getEvenNumber (theViewportSizeX); | |
81 | mySizeY = getEvenNumber (theViewportSizeY); | |
82 | } | |
83 | ||
84 | // setup viewport sizes as is | |
85 | myVPSizeX = theViewportSizeX; | |
86 | myVPSizeY = theViewportSizeY; | |
87 | ||
88 | // Create the texture (will be used as color buffer) | |
2166f0fa | 89 | if (!InitTrashTexture (theGlContext)) |
7fd59977 | 90 | { |
91 | if (!isPowerOfTwo (mySizeX) || !isPowerOfTwo (mySizeY)) | |
92 | { | |
2166f0fa | 93 | return Init (theGlContext, theViewportSizeX, theViewportSizeY, GL_TRUE); |
7fd59977 | 94 | } |
2166f0fa | 95 | Release (theGlContext); |
7fd59977 | 96 | return Standard_False; |
97 | } | |
98 | ||
b859a34d | 99 | if (!theGlContext->extPDS) |
100 | { | |
101 | // Create RenderBuffer to be used as depth buffer | |
102 | theGlContext->extFBO->glGenRenderbuffersEXT (1, &myGlDepthRBId); | |
103 | theGlContext->extFBO->glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, myGlDepthRBId); | |
104 | theGlContext->extFBO->glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, mySizeX, mySizeY); | |
105 | ||
106 | // Create RenderBuffer to be used as stencil buffer | |
107 | theGlContext->extFBO->glGenRenderbuffersEXT (1, &myGlStencilRBId); | |
108 | theGlContext->extFBO->glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, myGlStencilRBId); | |
109 | theGlContext->extFBO->glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX, mySizeX, mySizeY); | |
110 | } | |
111 | else | |
112 | { | |
113 | // Create combined depth stencil buffer | |
114 | theGlContext->extFBO->glGenRenderbuffersEXT (1, &myGlDepthRBId); | |
115 | theGlContext->extFBO->glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, myGlDepthRBId); | |
116 | theGlContext->extFBO->glRenderbufferStorageEXT (GL_RENDERBUFFER_EXT, GL_DEPTH24_STENCIL8_EXT, mySizeX, mySizeY); | |
117 | myGlStencilRBId = myGlDepthRBId; | |
118 | } | |
7fd59977 | 119 | |
120 | // Build FBO and setup it as texture | |
2166f0fa SK |
121 | theGlContext->extFBO->glGenFramebuffersEXT (1, &myGlFBufferId); |
122 | theGlContext->extFBO->glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, myGlFBufferId); | |
7fd59977 | 123 | glEnable (GL_TEXTURE_2D); |
124 | glBindTexture (GL_TEXTURE_2D, myGlTextureId); | |
2166f0fa | 125 | theGlContext->extFBO->glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, myGlTextureId, 0); |
9be3a894 | 126 | theGlContext->extFBO->glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, myGlDepthRBId); |
b859a34d | 127 | theGlContext->extFBO->glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, myGlStencilRBId); |
2166f0fa | 128 | if (theGlContext->extFBO->glCheckFramebufferStatusEXT (GL_FRAMEBUFFER_EXT) != GL_FRAMEBUFFER_COMPLETE_EXT) |
7fd59977 | 129 | { |
130 | if (!isPowerOfTwo (mySizeX) || !isPowerOfTwo (mySizeY)) | |
131 | { | |
2166f0fa | 132 | return Init (theGlContext, theViewportSizeX, theViewportSizeY, GL_TRUE); |
7fd59977 | 133 | } |
2166f0fa | 134 | Release (theGlContext); |
7fd59977 | 135 | return Standard_False; |
136 | } | |
137 | ||
2166f0fa | 138 | UnbindBuffer (theGlContext); |
7fd59977 | 139 | UnbindTexture(); |
2166f0fa | 140 | theGlContext->extFBO->glBindRenderbufferEXT (GL_RENDERBUFFER_EXT, NO_RENDERBUFFER); |
7fd59977 | 141 | |
142 | #ifdef DEB | |
143 | std::cerr << "OpenGl_FrameBuffer, created FBO " << mySizeX << "x" << mySizeY | |
144 | << " for viewport " << theViewportSizeX << "x" << theViewportSizeY << "\n"; | |
145 | #endif | |
146 | return Standard_True; | |
147 | } | |
148 | ||
2166f0fa | 149 | void OpenGl_FrameBuffer::Release (const Handle(OpenGl_Context)& theGlContext) |
7fd59977 | 150 | { |
151 | if (IsValidDepthBuffer()) | |
152 | { | |
2166f0fa SK |
153 | if (!theGlContext.IsNull() && theGlContext->extFBO != NULL) |
154 | { | |
155 | theGlContext->extFBO->glDeleteRenderbuffersEXT (1, &myGlDepthRBId); | |
156 | myGlDepthRBId = NO_RENDERBUFFER; | |
157 | } | |
158 | else | |
159 | { | |
160 | std::cerr << "OpenGl_FrameBuffer::Release() called with invalid OpenGl_Context!\n"; | |
161 | } | |
7fd59977 | 162 | } |
b859a34d | 163 | if (IsValidStencilBuffer()) |
164 | { | |
165 | if (!theGlContext.IsNull() && theGlContext->extFBO != NULL) | |
166 | { | |
167 | theGlContext->extFBO->glDeleteRenderbuffersEXT (1, &myGlStencilRBId); | |
168 | myGlStencilRBId = NO_RENDERBUFFER; | |
169 | } | |
170 | else | |
171 | { | |
172 | std::cerr << "OpenGl_FrameBuffer::Release() called with invalid OpenGl_Context!\n"; | |
173 | } | |
174 | } | |
7fd59977 | 175 | if (IsValidTexture()) |
176 | { | |
177 | glDeleteTextures (1, &myGlTextureId); | |
178 | myGlTextureId = NO_TEXTURE; | |
179 | } | |
180 | mySizeX = mySizeY = myVPSizeX = myVPSizeY = 0; | |
181 | if (IsValidFrameBuffer()) | |
182 | { | |
2166f0fa SK |
183 | if (!theGlContext.IsNull() && theGlContext->extFBO != NULL) |
184 | { | |
185 | theGlContext->extFBO->glDeleteFramebuffersEXT (1, &myGlFBufferId); | |
186 | myGlFBufferId = NO_FRAMEBUFFER; | |
187 | } | |
188 | else | |
189 | { | |
190 | std::cerr << "OpenGl_FrameBuffer::Release() called with invalid OpenGl_Context!\n"; | |
191 | } | |
7fd59977 | 192 | } |
193 | } | |
194 | ||
195 | Standard_Boolean OpenGl_FrameBuffer::IsProxySuccess() const | |
196 | { | |
197 | // use proxy to check texture could be created or not | |
198 | glTexImage2D (GL_PROXY_TEXTURE_2D, | |
199 | 0, // LOD number: 0 - base image level; n is the nth mipmap reduction image | |
200 | myTextFormat, // internalformat | |
201 | mySizeX, mySizeY, 0, | |
202 | GL_RGBA, GL_UNSIGNED_BYTE, NULL); | |
203 | GLint aTestParamX (0), aTestParamY (0); | |
204 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestParamX); | |
205 | glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestParamY); | |
206 | return aTestParamX != 0 && aTestParamY != 0; | |
207 | } | |
208 | ||
2166f0fa | 209 | Standard_Boolean OpenGl_FrameBuffer::InitTrashTexture (const Handle(OpenGl_Context)& theGlContext) |
7fd59977 | 210 | { |
211 | // Check texture size is fit dimension maximum | |
212 | GLint aMaxTexDim = 2048; | |
213 | glGetIntegerv (GL_MAX_TEXTURE_SIZE, &aMaxTexDim); | |
214 | if (mySizeX > aMaxTexDim || mySizeY > aMaxTexDim) | |
215 | { | |
216 | return Standard_False; | |
217 | } | |
218 | ||
219 | // generate new id | |
220 | glEnable (GL_TEXTURE_2D); | |
221 | if (!IsValidTexture()) | |
222 | { | |
223 | glGenTextures (1, &myGlTextureId); // Create The Texture | |
224 | } | |
225 | glBindTexture (GL_TEXTURE_2D, myGlTextureId); | |
226 | ||
227 | // texture interpolation parameters - could be overridden later | |
228 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); | |
229 | glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); | |
230 | ||
231 | if (!IsProxySuccess()) | |
232 | { | |
2166f0fa | 233 | Release (theGlContext); |
7fd59977 | 234 | return Standard_False; |
235 | } | |
236 | ||
237 | glTexImage2D (GL_TEXTURE_2D, | |
238 | 0, // LOD number: 0 - base image level; n is the nth mipmap reduction image | |
239 | myTextFormat, // internalformat | |
240 | mySizeX, mySizeY, 0, | |
241 | GL_RGBA, GL_UNSIGNED_BYTE, NULL); // NULL pointer supported from OpenGL 1.1 | |
242 | return Standard_True; | |
243 | } |