Read/write bmp format, from/to file and memory. More...

#include <string.h>
#include "allheaders.h"
#include "bmp.h"

Defines
#define	DEBUG 0
Functions
PIX *	pixReadStreamBmp (FILE *fp)
l_int32	pixWriteStreamBmp (FILE fp, PIX pix)
PIX *	pixReadMemBmp (const l_uint8 *cdata, size_t size)
l_int32	pixWriteMemBmp (l_uint8 *pdata, size_t psize, PIX *pix)
Variables
RGBA_QUAD	bwmap [2] = { {255,255,255,0}, {0,0,0,0} }

Detailed Description

Read/write bmp format, from/to file and memory.

    Read bmp from file
         PIX          *pixReadStreamBmp()

    Write bmp to file
         l_int32       pixWriteStreamBmp()

    Read/write to memory   [only on linux]
         PIX          *pixReadMemBmp()
         l_int32       pixWriteMemBmp()

Definition in file bmpio.c.

Define Documentation

#define DEBUG 0

Definition at line 41 of file bmpio.c.

Function Documentation

PIX* pixReadStreamBmp ( FILE * fp )

pixReadStreamBmp()

Input: stream opened for read Return: pix, or null on error

Notes: (1) Here are references on the bmp file format: http://en.wikipedia.org/wiki/BMP_file_format http://www.fortunecity.com/skyscraper/windows/364/bmpffrmt.html

Definition at line 57 of file bmpio.c.

References PixColormap::array, BMP_InfoHeader::biClrImportant, BMP_InfoHeader::biClrUsed, BMP_InfoHeader::biPlanes, BMP_InfoHeader::biSize, BMP_FHBYTES, BMP_ID, BMP_IHBYTES, CALLOC, COLOR_BLUE, COLOR_GREEN, COLOR_RED, convertOnBigEnd16(), convertOnBigEnd32(), ERROR_PTR, FREE, L_MIN, L_WARNING, PixColormap::n, NULL, pixcmapCreate(), pixCreate(), pixDestroy(), pixEndianByteSwap(), pixGetData(), pixGetWpl(), pixRemoveColormap(), pixSetColormap(), pixSetXRes(), pixSetYRes(), PROCNAME, and REMOVE_CMAP_BASED_ON_SRC.

Referenced by pixReadStream().

l_int32 pixWriteStreamBmp	(	FILE *	fp,
		PIX *	pix
	)

pixWriteStreamBmp()

Input: stream opened for write pix (1, 4, 8, 32 bpp) Return: 0 if OK, 1 on error

Notes: (1) We position fp at the beginning of the stream, so it truncates any existing data (2) 2 bpp Bmp files are apparently not valid!. We can write and read them, but nobody else can read ours.

Definition at line 297 of file bmpio.c.

References PixColormap::array, BMP_InfoHeader::biBitCount, BMP_InfoHeader::biClrImportant, BMP_InfoHeader::biClrUsed, BMP_InfoHeader::biCompression, BMP_InfoHeader::biHeight, BMP_InfoHeader::biPlanes, BMP_InfoHeader::biSize, BMP_InfoHeader::biSizeImage, BMP_InfoHeader::biWidth, BMP_InfoHeader::biXPelsPerMeter, BMP_InfoHeader::biYPelsPerMeter, RGBA_Quad::blue, BMP_FHBYTES, BMP_ID, BMP_IHBYTES, bwmap, CALLOC, COLOR_BLUE, COLOR_GREEN, COLOR_RED, convertOnBigEnd16(), convertOnBigEnd32(), ERROR_INT, FREE, RGBA_Quad::green, L_WARNING, NULL, pixcmapGetCount(), pixEndianByteSwap(), pixGetColormap(), pixGetData(), pixGetDepth(), pixGetHeight(), pixGetWidth(), pixGetWpl(), pixGetXRes(), pixGetYRes(), pixInvert(), PROCNAME, RGBA_Quad::red, and x0.