Oops, you are quite right. I should have thought about it before I had sent this mail.
Matthias On Monday 01 August 2005 23:21, Gerard Robin wrote: > Le lundi 01 août 2005 à 23:08 +0200, Matthias Boerner a écrit : > > Hi, > > > > also NVIDIA is not working with 32bpp: You will get following error > > message if you switch to 32bpp in the section "Screen", SubSection > > "Display",...: > > > > (II) Setting vga for screen 0. > > (EE) NVIDIA(0): Given color depth (32) is not supported > > (EE) NVIDIA(0): *** Aborting *** > > (II) UnloadModule: "nvidia" > > (EE) Screen(s) found, but none have a usable configuration. > > > > > > The man pages of xorg.conf say at "DISPLAY SUBSECTION": > > > > Depth depth > > > > This entry specifies what colour depth the Display subsection is to be > > used for. This entry is usually specified, but it may be omitted to > > create a match-all Display subsection or when wishing to match only > > against the FbBpp parameter. The range of depth values that are allowed > > depends on the driver. Most driver support 8, 15, 16 and 24. Some also > > support 1 and/or 4, and some may support other values (like 30). Note: > > depth means the number of bits in a pixel that are actually used to > > determine the pixel colour. 32 is not a valid depth value. Most hardware > > that uses 32 bits per pixel only uses 24 of them to hold the colour > > information, which means that the colour depth is 24, not 32. > > > > Matthias > > Are you confusing both depth and pixel definition: > > here an extract from NVIDIA readme > > > DEPTH, BITS PER PIXEL, AND PITCH > > While not directly a concern when programming modes, the bits used per > pixel > is an issue when considering the maximum programmable resolution; for > this > reason, it is worthwhile to address the confusion surrounding the terms > "depth" and "bits per pixel". Depth is how many bits of data are stored > per > pixel. Supported depths are 8, 15, 16, and 24. Most video hardware, > however, > stores pixel data in sizes of 8, 16, or 32 bits; this is the amount of > memory > allocated per pixel. When you specify your depth, X selects the bits per > pixel > (bpp) size in which to store the data. Below is a table of what bpp is > used > for each possible depth: > > Depth BPP > ------------------------------- ------------------------------- > 8 8 > 15 16 > 16 16 > 24 32 _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
