Full Name	Windows cursor
Format ID	IG_FORMAT_CUR = 96
File Extension(s)	*.cur
Data Type	Raster image
Data Encoding	Binary
Color Profile Support	No
Multi-Page Support	Yes
Alpha Channel Support	Single alpha channel for read/write (see Comments).

ImageGear Supported Versions:

Windows 3.x

ImageGear Supported Features:

• IG_FLTR_DETECTSUPPORT - autodetection
• IG_FLTR_PAGEREADSUPPORT - single page file reading
• IG_FLTR_MPAGEREADSUPPORT - multi-page file reading
• IG_FLTR_PAGEINSERTSUPPORT - single-page file writing

ImageGear Read Support:

• IG_COMPRESSION_NONE:
  • Indexed + Extra: 1+1, 4+1, 8+1 bpp;
  • RGB + Alpha: 32 bpp
• IG_COMPRESSION_RLE:
  • Indexed + Extra: 4+1, 8+1 bpp

ImageGear Write Support:

• IG_COMPRESSION_NONE:
  • Indexed + Extra: 1+1, 4+1, 8+1 bpp;
  • RGB + Alpha: 32 bpp

ImageGear Filter Control Parameters:

Filter Control Parameter	Type	Default Value	Available Values	Description
READ_AS_RGBA	AT_BOOL	FALSE	TRUE, FALSE	If TRUE, ImageGear reads CUR format as RGBA (RGB with alpha channel). See Comments for more detail.

Comments:

Cursor files consist of a file header (that is repeated several times), info headers, and cursor data. Cursor data contains an XOR mask bitmap and a monochrome AND mask bitmap. Whenever Windows draws a cursor, the AND bitmap is applied to whatever is on the screen. After that, the XOR bitmap is applied.

READ_AS_RGBA control parameter determines how ImageGear reads the 1-bit AND masks. If READ_AS_RGBA is FALSE, ImageGear reads AND mask into "Extra" channel. This mode preserves unchanged pixel values from the file. However, in this mode ImageGear displays only the XOR mask and ignores AND mask (Extra channel) during display, i.e. display is not transparent. If READ_AS_RGBA is TRUE, ImageGear reads CUR files as 32 bpp RGB + Alpha. This allows transparent display.

Files must be 255x255 pixels or less.

References Used:

A Jorn Daub EDV-Beratung - Glashutter Weg 105 - D-22889 Tangstedt

fileformats@daubnet.com