weinstoc@sei.cmu.edu (Chuck Weinstock) (07/17/90)
According to the documentation of SysEnvirons, there is a highlevel QuickDraw routine which will allow me to determine if there is a color monitor present. I've searched through IM and have been unable to locate the reference to this routine. Could someone tell me how to decide whether a color monitor is present, or point me at the relevant documentation? Thanks. Chuck Weinstock
jackiw@cs.swarthmore.edu (Nick Jackiw) (07/18/90)
weinstoc@sei.cmu.edu (Chuck Weinstock) writes: > Could someone tell me how to > decide whether a color monitor is present, or point me at the relevant > documentation? Thanks. > > Chuck Weinstock You have a graphics device capable of displaying color if GetMaxDevice^^.gdPMap^^.pixelSize>1 GetMaxDevice returns a handle to the Graphics Device of greatest pixel depth. gdPMap is the pixMap which images the device; pixelSize is the number of bits allocated to an individual pixel on this device. Note that for most practical purposes you'll want to check if pixelSize>2. 2-bit mode, while technically colored, is pretty lame. Note also that this call doesn't distinguish between color and gray-scale. Most of the time, you'll want to ignore this distinction. If not, you may want to examine theDevice^^.gdMode field...I'm not sure what needs to be done here. Check out Chapter 5 of Inside Mac Volume 5. Chapters 6 and 7 are related, too. -Nick -- -----Nick Jackiw [jackiw@cs.swarthmore.edu|jackiw@swarthmr.bitnet------ "This orbe of starres fixed infinitely vp extendeth hitself in altitvde sphericallye, and therefore immovable the pallace of foelicity garnished with perpetvall shining glorious lightes innvmerable." - Thomas Digges