Allocation

gflAllockBitmap

The gflAllockBitmap function allocates a picture, and returns 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 has 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

gflAllockBitmapEx

The gflAllockBitmapEx function allocates a picture, and returns a pointer on a GFL_BITMAP structure.

GFL_BITMAP* gflAllockBitmapEx(
  GFL_BITMAP_TYPE bitmap_type,  
  GFL_INT32 width, 
  GFL_INT32 height, 
  GFL_UINT16 bits_per_component, 
  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.

bits_per_component

Bits per component wanted. Can be 8 or 16.

line_padding

Pad for a pixel line.

For a value of 4, each line of pixels has 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

gflFreeBitmap

The gflFreeBitmap function frees a GFL_BITMAP structure, and his content.

void gflFreeBitmap(
  GFL_BITMAP* bitmap
);

Parameters

bitmap

Pointer to a GFL_BITMAP structure.

See also

gflAllockBitmap, gflFreeBitmapData

gflFreeBitmapData

The gflFreeBitmapData function frees the content of a GFL_BITMAP structure.

void gflFreeBitmapData(
  GFL_BITMAP* bitmap
);

Parameters

bitmap

Pointer to a GFL_BITMAP structure.

See also

gflAllockBitmap, gflFreeBitmap

gflCloneBitmap

The gflCloneBitmap function allows to clone a bitmap, and returns a pointer to a GFL_BITMAP structure.

GFL_BITMAP* gflCloneBitmap(
  const GFL_BITMAP* bitmap
);

Parameters

bitmap

Pointer to a GFL_BITMAP structure.

Return value

A pointer to a GFL_BITMAP structure or NULL.

See also

gflAllockBitmap, gflFreeBitmap, gflFreeBitmapData

gflMemoryAlloc

The gflMemoryAlloc function allocates memory.

void* gflMemoryAlloc(
  GFL_UINT32 size
);

Parameters

size

Size wanted.

Return value

The function returns NULL if an error occurs.

See also

gflMemoryRealloc, gflMemoryFree

gflMemoryRealloc

The gflMemoryRealloc function reallocates a memory area.

void* gflMemoryRealloc(
  void* ptr,  
  GFL_UINT32 size
);

Parameters

ptr

Pointer to a memory area allocated.

size

New size.

Return value

The function returns NULL if an error occurs.

See also

gflMemoryAlloc, gflMemoryFree

gflMemoryFree

The gflMemoryFree function frees memory.

void gflMemoryFree(
  void* ptr
);

Parameters

ptr

Pointer to a memory area allocated.

See also

gflMemoryAlloc, gflMemoryRealloc