Bitmap and icon files

.BMP/.ICO/.CUR files from OS/2 or Windows More...

Collaboration diagram for Bitmap and icon files:

Data Structures
struct	T_BMP_Header
	BMP file header. More...
struct	T_ICO_ImageEntry

Macros
#define	LOAD_BMP_PIXEL_FLAG_TOP_DOWN   0x01
	rows are stored from the top to the bottom (standard for BMP is from bottom to the top) More...
#define	LOAD_BMP_PIXEL_FLAG_TRANSP_PLANE   0x02
	We are decoding the AND-mask plane (transparency) of a .ICO file. More...

Functions
void	Test_BMP (T_IO_Context *context, FILE *file)
	Test for BMP format. More...
static byte	Bitmap_mask (dword pixel, dword mask, int bits, int shift)
	extract component value and properly shift it. More...
static void	Load_BMP_Palette (T_IO_Context *context, FILE *file, unsigned int nb_colors, int is_rgb24)
	Load the Palette for 1 to 8bpp BMP's. More...
static void	Load_BMP_Pixels (T_IO_Context *context, FILE *file, unsigned int compression, unsigned int nbbits, int flags, const dword *mask)
void	Load_BMP (T_IO_Context *context)
	Load BMP file. More...
void	Save_BMP (T_IO_Context *context)
	Save BMP file. More...
void	Test_ICO (T_IO_Context *context, FILE *file)
void	Load_ICO (T_IO_Context *context)
void	Save_ICO (T_IO_Context *context)

Detailed Description

.BMP/.ICO/.CUR files from OS/2 or Windows

We support OS/2 files and windows BITMAPINFOHEADER, BITMAPV4HEADER, BITMAPV5HEADER files.

.ICO with PNG content are also supported

Macro Definition Documentation

LOAD_BMP_PIXEL_FLAG_TOP_DOWN

#define LOAD_BMP_PIXEL_FLAG_TOP_DOWN   0x01

rows are stored from the top to the bottom (standard for BMP is from bottom to the top)

LOAD_BMP_PIXEL_FLAG_TRANSP_PLANE

#define LOAD_BMP_PIXEL_FLAG_TRANSP_PLANE   0x02

We are decoding the AND-mask plane (transparency) of a .ICO file.

Function Documentation

Test_BMP()

void Test_BMP	(	T_IO_Context *	context,
		FILE *	file
	)

Test for BMP format.

References File_error, GFX2_DEBUG, GFX2_Log(), T_BMP_Header::Offset, Read_bytes(), Read_dword_le(), Read_word_le(), T_BMP_Header::Reserved_1, T_BMP_Header::Reserved_2, T_BMP_Header::Signature, T_BMP_Header::Size_1, and T_BMP_Header::Size_2.

Bitmap_mask()

static byte Bitmap_mask ( dword  pixel, dword  mask, int  bits, int  shift  )

static

extract component value and properly shift it.

Referenced by Load_BMP_Pixels().

Load_BMP_Palette()

static void Load_BMP_Palette ( T_IO_Context *  context, FILE *  file, unsigned int  nb_colors, int  is_rgb24  )

static

Load the Palette for 1 to 8bpp BMP's.

References T_Config::Clear_palette, Config, File_error, MIN, T_IO_Context::Palette, and Read_bytes().

Referenced by Load_BMP(), and Load_ICO().

Load_BMP_Pixels()

static void Load_BMP_Pixels ( T_IO_Context *  context, FILE *  file, unsigned int  compression, unsigned int  nbbits, int  flags, const dword *  mask  )

static

References Bitmap_mask(), count_set_bits(), count_trailing_zeros(), File_error, flags, GFX2_Log(), GFX2_WARNING, T_IO_Context::Height, LOAD_BMP_PIXEL_FLAG_TOP_DOWN, LOAD_BMP_PIXEL_FLAG_TRANSP_PLANE, Load_PNG_Sub(), NULL, Read_byte(), Read_bytes(), Read_dword_le(), Read_word_le(), Set_pixel(), Set_pixel_24b(), T_IO_Context::Transparent_color, and T_IO_Context::Width.

Referenced by Load_BMP(), and Load_ICO().

Load_BMP()

void Load_BMP

(

T_IO_Context *

context

)

Load BMP file.

References T_BMP_Header::Clr_Imprt, T_BMP_Header::Compression, File_error, File_length_file(), FORMAT_BMP, GFX2_DEBUG, GFX2_Log(), GFX2_WARNING, T_BMP_Header::Height, Load_BMP_Palette(), LOAD_BMP_PIXEL_FLAG_TOP_DOWN, Load_BMP_Pixels(), T_BMP_Header::Nb_bits, T_BMP_Header::Nb_Clr, NULL, T_BMP_Header::Offset, Open_file_read(), PIXEL_SIMPLE, PIXEL_TALL, PIXEL_WIDE, T_BMP_Header::Planes, Pre_load(), Read_bytes(), Read_dword_le(), Read_word_le(), T_BMP_Header::Reserved_1, T_BMP_Header::Reserved_2, T_BMP_Header::Signature, T_BMP_Header::Size_1, T_BMP_Header::Size_2, T_BMP_Header::Size_3, T_BMP_Header::Width, T_BMP_Header::XPM, and T_BMP_Header::YPM.

Save_BMP()

void Save_BMP

(

T_IO_Context *

context

)

Save BMP file.

References T_BMP_Header::Clr_Imprt, T_BMP_Header::Compression, File_error, Get_pixel(), T_BMP_Header::Height, T_IO_Context::Height, T_BMP_Header::Nb_bits, T_BMP_Header::Nb_Clr, NULL, T_BMP_Header::Offset, Open_file_write(), T_IO_Context::Palette, T_BMP_Header::Planes, Remove_file(), T_BMP_Header::Reserved_1, T_BMP_Header::Reserved_2, T_BMP_Header::Signature, T_BMP_Header::Size_1, T_BMP_Header::Size_2, T_BMP_Header::Size_3, T_BMP_Header::Width, T_IO_Context::Width, Write_bytes(), Write_dword_le(), Write_one_byte, Write_word_le(), T_BMP_Header::XPM, and T_BMP_Header::YPM.

Test_ICO()

void Test_ICO	(	T_IO_Context *	context,
		FILE *	file
	)

References File_error, and Read_word_le().

Load_ICO()

void Load_ICO

(

T_IO_Context *

context

)

References T_IO_Context::Background_transparent, T_ICO_ImageEntry::bpp, T_ICO_ImageEntry::bytecount, T_BMP_Header::Clr_Imprt, T_BMP_Header::Compression, File_error, File_length_file(), FORMAT_ICO, GFX2_DEBUG, GFX2_Log(), GFX2_WARNING, T_BMP_Header::Height, T_ICO_ImageEntry::height, Load_BMP_Palette(), LOAD_BMP_PIXEL_FLAG_TOP_DOWN, LOAD_BMP_PIXEL_FLAG_TRANSP_PLANE, Load_BMP_Pixels(), Load_PNG_Sub(), T_BMP_Header::Nb_bits, T_BMP_Header::Nb_Clr, T_ICO_ImageEntry::ncolors, NULL, T_ICO_ImageEntry::offset, Open_file_read(), PIXEL_SIMPLE, T_BMP_Header::Planes, T_ICO_ImageEntry::planes, Pre_load(), Read_byte(), Read_bytes(), Read_dword_le(), Read_word_le(), T_ICO_ImageEntry::reserved, T_BMP_Header::Size_2, T_BMP_Header::Size_3, T_IO_Context::Transparent_color, T_BMP_Header::Width, T_ICO_ImageEntry::width, T_BMP_Header::XPM, and T_BMP_Header::YPM.

Save_ICO()

void Save_ICO

(

T_IO_Context *

context

)

References T_IO_Context::Background_transparent, T_ICO_ImageEntry::bpp, T_ICO_ImageEntry::bytecount, T_BMP_Header::Clr_Imprt, T_BMP_Header::Compression, File_error, Get_pixel(), GFX2_Log(), GFX2_WARNING, T_BMP_Header::Height, T_ICO_ImageEntry::height, T_IO_Context::Height, T_BMP_Header::Nb_bits, T_BMP_Header::Nb_Clr, T_ICO_ImageEntry::ncolors, NULL, T_ICO_ImageEntry::offset, Open_file_write(), T_IO_Context::Palette, T_BMP_Header::Planes, T_ICO_ImageEntry::planes, Remove_file(), T_ICO_ImageEntry::reserved, T_BMP_Header::Size_2, T_BMP_Header::Size_3, T_IO_Context::Transparent_color, T_BMP_Header::Width, T_ICO_ImageEntry::width, T_IO_Context::Width, Write_byte(), Write_dword_le(), Write_one_byte, Write_word_le(), T_BMP_Header::XPM, and T_BMP_Header::YPM.