+++ /dev/null
-// Copyright (C) 2007-2010 CEA/DEN, EDF R&D, OPEN CASCADE
-//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public
-// License as published by the Free Software Foundation; either
-// version 2.1 of the License.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-//
-// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
-//
-
-// File : GLViewer_FrameBuffer.cxx
-// Module : SALOME
-//
-#include "GLViewer_FrameBuffer.h"
-
-#include <cstring>
-
-#ifndef WNT
-# ifndef GLX_GLXEXT_LEGACY
-# define GLX_GLXEXT_LEGACY
-# endif
-# include <GL/glx.h>
-# include <dlfcn.h>
-#else
-# include <wingdi.h>
-#endif
-
-#ifndef APIENTRY
-#define APIENTRY
-#endif
-#ifndef APIENTRYP
-#define APIENTRYP APIENTRY *
-#endif
-
-#ifndef GL_FRAMEBUFFER_EXT
-#define GL_FRAMEBUFFER_EXT 0x8D40
-#endif
-
-#ifndef GL_RENDERBUFFER_EXT
-#define GL_RENDERBUFFER_EXT 0x8D41
-#endif
-
-#ifndef GL_COLOR_ATTACHMENT0_EXT
-#define GL_COLOR_ATTACHMENT0_EXT 0x8CE0
-#endif
-
-#ifndef GL_DEPTH_ATTACHMENT_EXT
-#define GL_DEPTH_ATTACHMENT_EXT 0x8D00
-#endif
-
-#ifndef GL_FRAMEBUFFER_COMPLETE_EXT
-#define GL_FRAMEBUFFER_COMPLETE_EXT 0x8CD5
-#endif
-
-typedef void (APIENTRYP PFNGLGENFRAMEBUFFERSEXTPROC) (GLsizei n, GLuint *framebuffers);
-typedef void (APIENTRYP PFNGLBINDFRAMEBUFFEREXTPROC) (GLenum target, GLuint framebuffer);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERTEXTURE2DEXTPROC) (GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level);
-typedef GLenum (APIENTRYP PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC) (GLenum target);
-typedef void (APIENTRYP PFNGLDELETEFRAMEBUFFERSEXTPROC) (GLsizei n, const GLuint *framebuffers);
-typedef void (APIENTRYP PFNGLGENRENDERBUFFERSEXTPROC) (GLsizei n, GLuint *renderbuffers);
-typedef void (APIENTRYP PFNGLBINDRENDERBUFFEREXTPROC) (GLenum target, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLRENDERBUFFERSTORAGEEXTPROC) (GLenum target, GLenum internalformat, GLsizei width, GLsizei height);
-typedef void (APIENTRYP PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC) (GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer);
-typedef void (APIENTRYP PFNGLDELETERENDERBUFFERSEXTPROC) (GLsizei n, const GLuint *renderbuffers);
-
-static PFNGLGENFRAMEBUFFERSEXTPROC vglGenFramebuffersEXT = NULL;
-static PFNGLBINDFRAMEBUFFEREXTPROC vglBindFramebufferEXT = NULL;
-static PFNGLFRAMEBUFFERTEXTURE2DEXTPROC vglFramebufferTexture2DEXT = NULL;
-static PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC vglCheckFramebufferStatusEXT = NULL;
-static PFNGLDELETEFRAMEBUFFERSEXTPROC vglDeleteFramebuffersEXT = NULL;
-static PFNGLGENRENDERBUFFERSEXTPROC vglGenRenderbuffersEXT = NULL;
-static PFNGLBINDRENDERBUFFEREXTPROC vglBindRenderbufferEXT = NULL;
-static PFNGLRENDERBUFFERSTORAGEEXTPROC vglRenderbufferStorageEXT = NULL;
-static PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC vglFramebufferRenderbufferEXT = NULL;
-static PFNGLDELETERENDERBUFFERSEXTPROC vglDeleteRenderbuffersEXT = NULL;
-
-#ifndef WNT
-#define GL_GetProcAddress( x ) glXGetProcAddressARB( (const GLubyte*)x )
-#else
-#define GL_GetProcAddress( x ) wglGetProcAddress( (const LPCSTR)x )
-#endif
-
-bool InitializeEXT()
-{
- vglGenFramebuffersEXT = (PFNGLGENFRAMEBUFFERSEXTPROC)GL_GetProcAddress( "glGenFramebuffersEXT" );
- vglBindFramebufferEXT = (PFNGLBINDFRAMEBUFFEREXTPROC)GL_GetProcAddress( "glBindFramebufferEXT" );
- vglFramebufferTexture2DEXT = (PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)GL_GetProcAddress( "glFramebufferTexture2DEXT" );
- vglCheckFramebufferStatusEXT = (PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)GL_GetProcAddress( "glCheckFramebufferStatusEXT" );
- vglDeleteFramebuffersEXT = (PFNGLDELETEFRAMEBUFFERSEXTPROC)GL_GetProcAddress( "glDeleteFramebuffersEXT" );
- vglGenRenderbuffersEXT = (PFNGLGENRENDERBUFFERSEXTPROC)GL_GetProcAddress( "glGenRenderbuffersEXT" );
- vglBindRenderbufferEXT = (PFNGLBINDRENDERBUFFEREXTPROC)GL_GetProcAddress( "glBindRenderbufferEXT" );
- vglRenderbufferStorageEXT = (PFNGLRENDERBUFFERSTORAGEEXTPROC)GL_GetProcAddress( "glRenderbufferStorageEXT" );
- vglFramebufferRenderbufferEXT = (PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)GL_GetProcAddress( "glFramebufferRenderbufferEXT" );
- vglDeleteRenderbuffersEXT = (PFNGLDELETERENDERBUFFERSEXTPROC)GL_GetProcAddress( "glDeleteRenderbuffersEXT" );
-
- bool ok = vglGenFramebuffersEXT && vglBindFramebufferEXT && vglFramebufferTexture2DEXT &&
- vglCheckFramebufferStatusEXT && vglDeleteFramebuffersEXT && vglGenRenderbuffersEXT &&
- vglBindRenderbufferEXT && vglRenderbufferStorageEXT && vglFramebufferRenderbufferEXT &&
- vglDeleteRenderbuffersEXT;
-
- return ok;
-}
-
-GLViewer_FrameBuffer::GLViewer_FrameBuffer()
- : textureId( 0 ),
- fboId( 0 ),
- rboId( 0 ),
- myIsInitializeEXT ( false )
-{
-}
-
-GLViewer_FrameBuffer::~GLViewer_FrameBuffer()
-{
- release();
-}
-
-bool GLViewer_FrameBuffer::init( const GLsizei& xSize, const GLsizei& ySize )
-{
- myIsInitializeEXT = InitializeEXT();
- char* ext = (char*)glGetString( GL_EXTENSIONS );
- if( !myIsInitializeEXT || strstr( ext, "GL_EXT_framebuffer_object" ) == NULL )
- return false;
-
- // create a texture object
- glEnable( GL_TEXTURE_2D );
- glGenTextures( 1, &textureId );
- glBindTexture( GL_TEXTURE_2D, textureId );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
- glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
- glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA8, xSize, ySize, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
- glBindTexture( GL_TEXTURE_2D, 0 );
-
- // create a renderbuffer object to store depth info
- vglGenRenderbuffersEXT( 1, &rboId );
- vglBindRenderbufferEXT( GL_RENDERBUFFER_EXT, rboId );
- vglRenderbufferStorageEXT( GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT, xSize, ySize );
- vglBindRenderbufferEXT( GL_RENDERBUFFER_EXT, 0 );
-
- // create a framebuffer object
- vglGenFramebuffersEXT( 1, &fboId );
- vglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fboId );
-
- // attach the texture to FBO color attachment point
- vglFramebufferTexture2DEXT( GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, textureId, 0 );
-
- // attach the renderbuffer to depth attachment point
- vglFramebufferRenderbufferEXT( GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, rboId );
-
- // check FBO status
- GLenum status = vglCheckFramebufferStatusEXT( GL_FRAMEBUFFER_EXT );
-
- // Unbind FBO
- vglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, 0 );
-
- return status == GL_FRAMEBUFFER_COMPLETE_EXT;
-}
-
-void GLViewer_FrameBuffer::release()
-{
- if( !myIsInitializeEXT )
- return;
-
- glDeleteTextures( 1, &textureId );
- textureId = 0;
-
- vglDeleteFramebuffersEXT( 1, &fboId );
- fboId = 0;
-
- vglDeleteRenderbuffersEXT( 1, &rboId );
- rboId = 0;
-}
-
-void GLViewer_FrameBuffer::bind()
-{
- if( !myIsInitializeEXT )
- return;
-
- vglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, fboId );
-}
-
-void GLViewer_FrameBuffer::unbind()
-{
- if( !myIsInitializeEXT )
- return;
-
- vglBindFramebufferEXT( GL_FRAMEBUFFER_EXT, 0 );
-}
