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added wglinfo
git-svn-id: https://glew.svn.sourceforge.net/svnroot/glew/trunk/glew@37 783a27ee-832a-0410-bc00-9f386506c6dd
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@ -31,6 +31,7 @@ GLEW: The OpenGL Extension Wrangler Library
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<tr><td align=center><a href="#Build"><font size="-1">How to Build Your Project with GLEW</font></a></td></tr>
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<tr><td align=center><a href="#Install"><font size="-1">How to Install GLEW</font></a></td></tr>
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<tr><td align=center><a href="#Use"><font size="-1">How to Use GLEW</font></a></td></tr>
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<tr><td align=center><a href="#Utilities"><font size="-1">Utilities</font></a></td></tr>
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<tr><td align=center><a href="#Issues"><font size="-1">Known Issues</font></a></td></tr>
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<tr><td align=center><a href="#Credits"><font size="-1">Credits, Copyright</font></a></td></tr>
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</table>
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@ -332,14 +333,39 @@ else
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}
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</pre></blockquote>
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<tr>
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<td bgcolor="#FFF0D0" align="center"><a
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name="Utilities"><font size="+1"><b>Utilities</b></font></a>
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</td>
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</tr>
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<tr>
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<td>
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GLEW provides two command line tools: one for creating a list of
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available extensions and visuals; and another for verification of extension
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entry points.
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<p>
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<font size="+1"><b>glewinfo: a command line extension reporting utility</b></font>
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<font size="+1"><b>wglinfo: reporting extensions and visuals on Windows</b></font>
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<p>
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GLEW comes with a command line utility called <tt>glewinfo</tt> that
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allows you to make a list of the extensions supported on your platform.
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The <tt>glewinfo</tt> utility uses GLEW to find out which extensions
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<tt>wglinfo</tt> is the Windows version of <tt>glxinfo</tt>. By
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default it creates a file called <tt>wglinfo.txt</tt> containing
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a list of available OpenGL, WGL, and GLU extensions
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as well as a table of visuals, aka. pixelformats. PBuffer and multiple output
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capable visuals are also included. The format of the table is
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described <a href="wglinfo.txt">here</a>. For additional usage information, type
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<tt>wglinfo -h</tt>.
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<p>
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<font size="+1"><b>glewinfo: extension verification utility</b></font>
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<p>
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<tt>glewinfo</tt> allows you to verify the entry points for the
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extensions supported on your platform. It uses GLEW to find out which extensions
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and entry points are available and reports the results to a text file
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called <tt>glewinfo.txt</tt>.
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@ -384,7 +410,11 @@ GLEW was developed by Milan Ikits. He also performs occasional
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maintainance to make sure that GLEW stays in mint condition. Aaron
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Lefohn, Joe Kniss, and Chris Wyman were the first users and also
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assisted with the design and debugging process. The acronym
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originates from Aaron Lefohn.
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originates from Aaron Lefohn. The RPM packages are maintained by Karol
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Pietrzak. Nate Robins created the <tt>wglinfo</tt> utility,
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to which modifications were added by Michael Wimmer.
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<p>
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<p>
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GLEW is derived from the EXTGL project by Lev Povalahev. It is
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licensed under the LGPL, the BSD license, the SGI Free Software
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77
doc/wglinfo.txt
Normal file
77
doc/wglinfo.txt
Normal file
@ -0,0 +1,77 @@
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------------------
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Readme for wglinfo
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------------------
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Copyright (C) Nate Robins, 1997
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Michael Wimmer, 1999
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Milan Ikits, 2003
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wglinfo is a small utility that displays all available visuals,
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aka. pixelformats, in an OpenGL system along with renderer version
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information. It shows a table of all the visuals that support OpenGL
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and their capabilities. The format of the table is similar to glxinfo
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on Unix systems:
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visual ~= pixel format descriptor
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id = visual id (integer from 1 - max visuals)
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dep = cColorBits - color depth
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tp = dwFlags - visual type (wn: window, pb: pbuffer, bm: bitmap)
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xsp = no analog - transparent pixel (currently always ".")
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bfsz = cColorBits - framebuffer size
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lvl = bReserved - overlay (>0), underlay (<0), main plane (0)
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rgci = iPixelType - rb = rgba mode, ci = color index mode
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db = dwFlags & PFD_DOUBLEBUFFER - double buffer flag (y = yes)
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stro = dwFlags & PFD_STEREO - stereo flag (y = yes)
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gene = dwFlags & PFD_GENERIC - software generic (y = yes) or ICD
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geac = dwFlags & PFD_GENERIC_ACCELERATED - generic with hardware (MCD)
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rsz = cRedBits - # bits of red
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gsz = cGreenBits - # bits of green
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bsz = cBlueBits - # bits of blue
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asz = cAlphaBits - # bits of alpha
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axbf = cAuxBuffers - # of aux buffers
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dpth = cDepthBits - # bits of depth
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stcl = cStencilBits - # bits of stencil
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accum sz = cAccumBits - total # of bits in accumulation buffer
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accum r = cAccumRedBits - # bits of red in accumulation buffer
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accum g = cAccumGreenBits - # bits of green in accumulation buffer
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accum b = cAccumBlueBits - # bits of blue in accumulation buffer
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accum a = cAccumAlphaBits - # bits of alpha in accumulation buffer
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ms ns/b = no analog - multisample buffers (currently always ".")
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In the 10th column, you will find two additional columns:
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ge ge
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ne ac
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Those capture the PFD_GENERIC_FORMAT (gene) and
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PFD_GENERIC_ACCELERATED (geac) flags of the Pixelformat descriptor. If
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'gene' is set to no, there is most probably an ICD (Installable Client
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Driver) at work, i.e., a full OpenGL implementation by a hardware
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vendor. If 'gene' is set to yes and 'geac' to no, then the MS/SGI
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(whichever is reported) software implementation is at work. If 'gene'
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and 'geac' both are set to yes, then the generic implementation is
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supplemented by hardware acceleration, which should most certainly
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mean that an MCD (Mini Client Driver) is at work, i.e., a small driver
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that only exposes the rasterization interface of the underlying
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hardware.
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For additional details on what these flags mean, please refer to the
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included source code. The original source code can be found in the
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SGI OpenGL Windows SDK.
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For usage information, type 'wglinfo -h'
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The '-w' switch will case the program to list all pixelformats that
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can be used for hardware accelerated rendering. Hence, all pixelformats
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that can only render to bitmaps are omitted, making the output slightly more
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readable.
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The '-d' switch works around problems with some implementations where it is
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not possible to create an OpenGL context without special preparations (fullscreen
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mode or others). It forces wglinfo to only print pixelformat information, but
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no renderer information, which would require a context to be created.
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This switch shouldn't be necessary for any current OpenGL driver.
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The '-v' switch lists the pixelformats in a verbose form.
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The '-s' sends the output to stdout instead of wglinfo.txt.
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