mirror of
https://github.com/nigels-com/glew.git
synced 2024-11-11 16:53:49 +00:00
78 lines
3.5 KiB
Plaintext
78 lines
3.5 KiB
Plaintext
|
------------------
|
||
|
|
Readme for wglinfo
|
||
|
|
------------------
|
||
|
|
|
||
|
|
Copyright (C) Nate Robins, 1997
|
||
|
|
Michael Wimmer, 1999
|
||
|
|
Milan Ikits, 2003
|
||
|
|
|
||
|
|
wglinfo is a small utility that displays all available visuals,
|
||
|
|
aka. pixelformats, in an OpenGL system along with renderer version
|
||
|
|
information. It shows a table of all the visuals that support OpenGL
|
||
|
|
and their capabilities. The format of the table is similar to glxinfo
|
||
|
|
on Unix systems:
|
||
|
|
|
||
|
|
visual ~= pixel format descriptor
|
||
|
|
id = visual id (integer from 1 - max visuals)
|
||
|
|
dep = cColorBits - color depth
|
||
|
|
tp = dwFlags - visual type (wn: window, pb: pbuffer, bm: bitmap)
|
||
|
|
xsp = no analog - transparent pixel (currently always ".")
|
||
|
|
bfsz = cColorBits - framebuffer size
|
||
|
|
lvl = bReserved - overlay (>0), underlay (<0), main plane (0)
|
||
|
|
rgci = iPixelType - rb = rgba mode, ci = color index mode
|
||
|
|
db = dwFlags & PFD_DOUBLEBUFFER - double buffer flag (y = yes)
|
||
|
|
stro = dwFlags & PFD_STEREO - stereo flag (y = yes)
|
||
|
|
gene = dwFlags & PFD_GENERIC - software generic (y = yes) or ICD
|
||
|
|
geac = dwFlags & PFD_GENERIC_ACCELERATED - generic with hardware (MCD)
|
||
|
|
rsz = cRedBits - # bits of red
|
||
|
|
gsz = cGreenBits - # bits of green
|
||
|
|
bsz = cBlueBits - # bits of blue
|
||
|
|
asz = cAlphaBits - # bits of alpha
|
||
|
|
axbf = cAuxBuffers - # of aux buffers
|
||
|
|
dpth = cDepthBits - # bits of depth
|
||
|
|
stcl = cStencilBits - # bits of stencil
|
||
|
|
accum sz = cAccumBits - total # of bits in accumulation buffer
|
||
|
|
accum r = cAccumRedBits - # bits of red in accumulation buffer
|
||
|
|
accum g = cAccumGreenBits - # bits of green in accumulation buffer
|
||
|
|
accum b = cAccumBlueBits - # bits of blue in accumulation buffer
|
||
|
|
accum a = cAccumAlphaBits - # bits of alpha in accumulation buffer
|
||
|
|
ms ns/b = no analog - multisample buffers (currently always ".")
|
||
|
|
|
||
|
|
In the 10th column, you will find two additional columns:
|
||
|
|
|
||
|
|
ge ge
|
||
|
|
ne ac
|
||
|
|
|
||
|
|
Those capture the PFD_GENERIC_FORMAT (gene) and
|
||
|
|
PFD_GENERIC_ACCELERATED (geac) flags of the Pixelformat descriptor. If
|
||
|
|
'gene' is set to no, there is most probably an ICD (Installable Client
|
||
|
|
Driver) at work, i.e., a full OpenGL implementation by a hardware
|
||
|
|
vendor. If 'gene' is set to yes and 'geac' to no, then the MS/SGI
|
||
|
|
(whichever is reported) software implementation is at work. If 'gene'
|
||
|
|
and 'geac' both are set to yes, then the generic implementation is
|
||
|
|
supplemented by hardware acceleration, which should most certainly
|
||
|
|
mean that an MCD (Mini Client Driver) is at work, i.e., a small driver
|
||
|
|
that only exposes the rasterization interface of the underlying
|
||
|
|
hardware.
|
||
|
|
|
||
|
|
For additional details on what these flags mean, please refer to the
|
||
|
|
included source code. The original source code can be found in the
|
||
|
|
SGI OpenGL Windows SDK.
|
||
|
|
|
||
|
|
For usage information, type 'wglinfo -h'
|
||
|
|
|
||
|
|
The '-w' switch will case the program to list all pixelformats that
|
||
|
|
can be used for hardware accelerated rendering. Hence, all pixelformats
|
||
|
|
that can only render to bitmaps are omitted, making the output slightly more
|
||
|
|
readable.
|
||
|
|
|
||
|
|
The '-d' switch works around problems with some implementations where it is
|
||
|
|
not possible to create an OpenGL context without special preparations (fullscreen
|
||
|
|
mode or others). It forces wglinfo to only print pixelformat information, but
|
||
|
|
no renderer information, which would require a context to be created.
|
||
|
|
This switch shouldn't be necessary for any current OpenGL driver.
|
||
|
|
|
||
|
|
The '-v' switch lists the pixelformats in a verbose form.
|
||
|
|
|
||
|
|
The '-s' sends the output to stdout instead of wglinfo.txt.
|