bm_info_header_t Struct Reference

Detailed Description

Bitmap file information header. Starts after the file header and is 40 bytes long, in little endian and packed.

Definition at line 71 of file bmp_lib.c.


Data Fields
unsigned short	biBitCount
	Number of bits per pixel, which is the color depth of the image. Typical values are 1, 4, 8, 16, 24 and 32.
unsigned int	biClrImportant
unsigned int	biClrUsed
unsigned int	biCompression
	Define the compression method being used 0 (BI_RGB): No compression 1 (BI_RLE8): 2 (BI_RLE4): 3 (BI_BITFIELDS):.
int	biHeight
	Height of the bitmap in pixels If this value is positiv -> "bottom-up"-bitmap (picture data starts with the bottom line and ends with the top line) If this value is negativ ->"top-down"-Bitmap (picture data starts with the top line and ends with the bottom line).
unsigned short	biPlanes
	Number of color planes being used. Not often used.
unsigned int	biSize
	Size of the information header.
unsigned int	biSizeImage
	Image size. This is the size of the raw bitmap data.
int	biWidth
	Width of the bitmap in pixels.
int	biXPelsPerMeter
	Horizontale resolution.
int	biYPelsPerMeter
	Vertical resolution.

Field Documentation

unsigned short bm_info_header_t::biBitCount

Number of bits per pixel, which is the color depth of the image. Typical values are 1, 4, 8, 16, 24 and 32.

Definition at line 88 of file bmp_lib.c.

Referenced by display_bm(), display_virtual_bm(), fill_frame_buffer_bm(), and fill_virtual_frame_buffer_bm().

unsigned int bm_info_header_t::biClrImportant

Definition at line 104 of file bmp_lib.c.

unsigned int bm_info_header_t::biClrUsed

Definition at line 103 of file bmp_lib.c.

unsigned int bm_info_header_t::biCompression

Define the compression method being used 0 (BI_RGB): No compression 1 (BI_RLE8): 2 (BI_RLE4): 3 (BI_BITFIELDS):.

Definition at line 95 of file bmp_lib.c.

Referenced by display_bm(), and display_virtual_bm().

int bm_info_header_t::biHeight

Height of the bitmap in pixels If this value is positiv -> "bottom-up"-bitmap (picture data starts with the bottom line and ends with the top line) If this value is negativ ->"top-down"-Bitmap (picture data starts with the top line and ends with the bottom line).

Definition at line 82 of file bmp_lib.c.

Referenced by display_bm(), display_virtual_bm(), fill_frame_buffer_bm(), and fill_virtual_frame_buffer_bm().

unsigned short bm_info_header_t::biPlanes

Number of color planes being used. Not often used.

Definition at line 84 of file bmp_lib.c.

unsigned int bm_info_header_t::biSize

Size of the information header.

Definition at line 73 of file bmp_lib.c.

unsigned int bm_info_header_t::biSizeImage

Image size. This is the size of the raw bitmap data.

Definition at line 98 of file bmp_lib.c.

int bm_info_header_t::biWidth