A program for converting rgb565 to bitmap

/*  All Rights Reserved  Author:fanping.deng@gmail.com  Function: convert RGB565 to BMP  Build by g++

*/# Include <unistd. h> # include <stdio. h> # include <errno. h> # include <sys/types. h> # include <sys/STAT. h> # include <fcntl. h> # include <stdlib. h> # include <string. h> typedef short word; typedef int DWORD; typedef int long; typedef char byte; // bitmap file header infotypedef struct tagbitmapfileheader {word bftype; DWORD bfsize; Word bfreserved1; Word bfreserved2; DWORD bfoffbits; }__ attribute _ (packed) bitmapfi Leheader; // bitmap info headertypedef struct tagbitmapinfoheader {// bmih DWORD bisize; long biwidth; // The Image Width in pixels long biheight; // The length of the image in pixels: Word biplanes; Word bibitcount; // DWORD bicompression; DWORD bisizeimage; long bixpelspermeter; long biypelspermeter; DWORD biclrused; DWORD biclrimportant ;} __attribute _ (packed) bitmapinfoheader; typedef struct tagpalettergb {byte B; byte g; byte R; byte reserved; }__ attribute _ (packed) palettergb; int g_len = sizeof (bitmapfileheader) + sizeof (bitmapinfoheader); // + sizeof (palettergb ); void initbmpheader (bitmapfileheader * pbmpfileheader) {pbmpfileheader-> bftype = 0x4d42; // magic number pbmpfileheader-> bfsize = g_len + 320*480*3; // 320*480, screen size, hardcoded. you shoshould change it for different size pbmpfileheader-> bfreserved1 = 0x00; PBM Pfileheader-> bfreserved2 = 0x00; pbmpfileheader-> bfoffbits = g_len;} void initbmp infoheader (bitmapinfoheader * pbmpinfoheader) {pbmpinfoheader-> bisize = sizeof (bitmapinfoheader ); pbmpinfoheader-> biwidth = 320; // This part is written to death, because at that time the mobile phone screen was tested to be pbmpinfoheader-> biheight = 480; pbmpinfoheader-> biplanes = 1; pbmpinfoheader-> bibitcount = 24; pbmpinfoheader-> bicompression = 0; pbmpinfoheader-> bisizeimage = 320*480*3; p BMP infoheader-> bixpelspermeter = pbmpinfoheader-> biypelspermeter = 0; pbmpinfoheader-> biclrused = pbmpinfoheader-> Signature = 0;} void convetbmp (int fs, int FD, short * psrc1_buffer, char * pdstintbuffer); int main (INT argc, char * argv []) {If (argc <3) {printf ("error use BMP generator, we need the Source Path "); return-1;} bitmapfileheader BMP fileheader; initbmpheader (& BMP fileheader); bitmapinfo Header BMP infoheader; initbmp infoheader (& BMP infoheader); palettergb BMP palette; memset (& BMP palette, 0, sizeof (palettergb); int FD = open (argv [1], o_creat | o_wronly ); if (FD =-1) {printf ("fail to create DST file % s \ n", argv [1]); exit (-1 );} int FS = open (argv [2], o_rdonly); If (FS =-1) {printf ("fail to open SRC file % s \ n ", argv [2]); exit (-1);} // write head info to the destination file // Note: The converted BMP data The format is rgb888, so no palette information is required. For information about BMP, you can search for write (FD, & BMP fileheader, sizeof (bitmapfileheader); write (FD, & BMP infoheader, sizeof (bitmapinfoheader); // write (FD, & BMP palette, sizeof (palettergb); // 320*480 // the row-based char * pdstintbuffer = new char [3*320]; memset (pdstintbuffer, 0, sizeof (char) * 320); short * psrc0000buffer = new short [320]; memset (psrc0000buffer, 0, sizeof (short) * 320); convetbmp (FS, FD, psrc0000buffer, pdstintbuffer); close (FD); close (FS); Delete [] psrc1_buffer; Delete [] pdstintbuffer; printf ("BMP generated \ n"); Return 0 ;} void convetbmp (int fs, int FD, short * psrc1_buffer, char * pdstintbuffer) {int Height = 480; int srclinelength = sizeof (short) * 320; int dstlienlength = sizeof (char) * 3*320; while (height> 0) {lseek (FS, (height-1) * srclinelength, seek_set); read (FS, (char *) psrc1_buffer, srclinelength ); for (INT x = 0; x <320; X ++) {short srcpixel = * (psrc1_buffer + x ); // first change rgb565 to rgb888 char srcr = (srcpixel & 0xf800)> 11; char srcg = (srcpixel & 0x07e0)> 5; char SRCB = srcpixel & 0x001f; pdstintbuffer [x * 3 + 0] = SRCB; pdstintbuffer [x * 3 + 1] = srcg; pdstintbuffer [x * 3 + 2] = srcr; pdstintbuffer [x * 3 + 0] <= 3; pdstintbuffer [x * 3 + 1] <= 2; pdstintbuffer [x * 3 + 2] <= 3; // pdstintbuffer [x * 3 + 0] | = (SRCB & 0x07); // pdstintbuffer [x * 3 + 1] | = (srcg & 0x03 ); // pdstintbuffer [x * 3 + 2] | = (srcr & 0x07);} write (FD, (char *) pdstintbuffer, dstlienlength); -- height ;}}