Opengl implementation based on off-screen rendering, the basic idea is to render to texture.

ogl_offscreen_rendering_1\codesampler.ico
.........................\Debug\BuildLog.htm
.........................\.....\mt.dep
.........................\.....\ogl_offscreen_rendering_1.bsc
.........................\.....\ogl_offscreen_rendering_1.exe
.........................\.....\ogl_offscreen_rendering_1.exe.intermediate.manifest
.........................\.....\ogl_offscreen_rendering_1.ilk
.........................\.....\ogl_offscreen_rendering_1.obj
.........................\.....\ogl_offscreen_rendering_1.pdb
.........................\.....\ogl_offscreen_rendering_1.res
.........................\.....\ogl_offscreen_rendering_1.sbr
.........................\.....\vc90.idb
.........................\.....\vc90.pdb
.........................\ogl_offscreen_rendering_1.cpp
.........................\ogl_offscreen_rendering_1.dsp
.........................\ogl_offscreen_rendering_1.ncb
.........................\ogl_offscreen_rendering_1.rc
.........................\ogl_offscreen_rendering_1.sln
.........................\ogl_offscreen_rendering_1.suo
.........................\ogl_offscreen_rendering_1.vcproj
.........................\ogl_offscreen_rendering_1.vcproj.7.10.old
.........................\ogl_offscreen_rendering_1.vcproj.87AD0F12DE4649E.Administrator.user
.........................\resource.h
.........................\test.bmp
.........................\UpgradeLog.XML
.........................\wglext.h
.........................\_UpgradeReport_Files\UpgradeReport.css
.........................\....................\UpgradeReport.xslt
.........................\....................\UpgradeReport_Minus.gif
.........................\....................\UpgradeReport_Plus.gif
.........................\Debug
.........................\_UpgradeReport_Files
ogl_offscreen_rendering_1

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