Question and Answer Database FAQ741D.txt How many colors will my display mode support Category :Windows API Platform :All Product :All 32 bit Question: How do I find the number of colors the current display mode supports? Answer: You can find the color depth of a display context in the following manner: GetDeviceCaps(Form1.Canvas.Handle, BITSPIXEL) * GetDeviceCaps(Form1.Canvas.Handle, PLANES) Will give you the total number of bits used to color a pixel. possible Return values of: 1 = 2 colors bpp 4 = 16 colors bpp 8 = 256 colors bpp 15 = 32768 colors (will return 16 on most drivers) bpp 16 = 65535 colors bpp 24 = 16,777,216 colors bpp 32 = 16,777,216 colors (same as 24) bpp You can use: NumberOfColors := (1 shl (GetDeviceCaps(Form1.Canvas.Handle, BITSPIXEL) * GetDeviceCaps(Form1.Canvas.Handle, PLANES)); to calculate the total number of colors. 7/16/98 4:31:28 PM
Last Modified: 01-SEP-99