gflAllockBitmap

The gflAllockBitmap function allocates a picture, and return a pointer on a GFL_BITMAP structure.

GFL_BITMAP * gflAllockBitmap(
  GFL_BITMAP_TYPE bitmap_type,  
  GFL_INT32 width, 
  GFL_INT32 height, 
  GFL_UINT32 line_padding, 
  const GFL_COLOR * color
);

Parameters

bitmap_type

Type of picture wanted.

GFL_BINARY	0x0001	Binary (8 bits)
GFL_GREY	0x0002	Grey scale (8 bits)
GFL_COLORS	0x0004	Colors with colormap (8 bits)
GFL_RGB	0x0008	TrueColors - Red/Green/Blue (24 bits)
GFL_RGBA	0x0010	TrueColors - Red/Green/Blue/Alpha (32 bits)
GFL_BGR	0x0020	TrueColors - Blue/Green/Red (24 bits)
GFL_ABGR	0x0040	TrueColors - Alpha/Blue/Green/Red (32 bits)
GFL_BGRA	0x0100	TrueColors - Blue/Green/Red/Alpha (32 bits)
GFL_ARGB	0x0200	TrueColors - Alpha/Red/Green/Blue (32 bits)

width

Width of the picture wanted.

height

Height of the picture wanted.

line_padding

Pad for a pixel line.
For a value of 4, each line of pixels have a multiple of 4 bytes (32 bits).

color

Pointer to a GFL_COLOR structure used to set the background color.
Can be NULL, the background color is (0,0,0).

Return value

A pointer to a GFL_BITMAP structure or NULL.

See also

gflFreeBitmap, gflFreeBitmapData