This is an off-screen rendering opengl a good procedure, introduced pbuffer the configuration and use, can be a high floating point accuracy.

simple_float_pbuffer
....................\DEMOS
....................\.....\OpenGL
....................\.....\......\bin
....................\.....\......\...\debug
....................\.....\......\...\release
....................\.....\......\inc
....................\.....\......\...\glh
....................\.....\......\...\...\glh_convenience.h
....................\.....\......\...\...\glh_glut.h
....................\.....\......\...\...\glh_linear.h
....................\.....\......\...\shared
....................\.....\......\...\......\data_path.h
....................\.....\......\...\......\quitapp.h
....................\.....\......\src
....................\.....\......\...\shared
....................\.....\......\...\......\data_path.cpp
....................\.....\......\...\simple_float_pbuffer
....................\.....\......\...\....................\Debug
....................\.....\......\...\....................\docs

....................\.....\......\...\....................\float_pbuffer_lnx.h
....................\.....\......\...\....................\float_pbuffer_win.h
....................\.....\......\...\....................\Makefile
....................\.....\......\...\....................\simple_float_pbuffer.cpp
....................\.....\......\...\....................\simple_float_pbuffer.ncb
....................\.....\......\...\....................\simple_float_pbuffer.sln
....................\.....\......\...\....................\simple_float_pbuffer.vcproj
....................\inc
....................\...\GL
....................\...\..\gl.h
....................\...\..\glext.h
....................\...\..\glut.h
....................\...\..\wglext.h
....................\...\glh
....................\...\...\glh_extensions.h
....................\...\...\glh_genext.h
....................\LIBS
....................\....\implib
....................\....\......\debug
....................\....\......\release
....................\....\inc
....................\....\...\nv_dds
....................\....\...\......\nv_dds.h
....................\....\lib
....................\....\...\debug
....................\....\...\release
....................\Media
....................\.....\textures
....................\.....\........\2d
....................\.....\........\..\nvlogo.dds

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