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[/] [or1k_old/] [trunk/] [mw/] [src/] [mwin/] [bmp/] [makebmp.c] - Rev 673
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/* * Copyright (c) 1999 Greg Haerr <greg@censoft.com> * * Framebuffer data to .bmp file converter * * 10/4/1999 g haerr */ #include <stdio.h> #include <unistd.h> #define BI_RGB 0L #define BI_RLE8 1L #define BI_RLE4 2L #define BI_BITFIELDS 3L typedef unsigned char BYTE; typedef unsigned short WORD; typedef unsigned long DWORD; typedef long LONG; #pragma pack(1) /* windows style*/ typedef struct { /* BITMAPFILEHEADER*/ BYTE bfType[2]; DWORD bfSize; WORD bfReserved1; WORD bfReserved2; DWORD bfOffBits; /* BITMAPINFOHEADER*/ DWORD BiSize; LONG BiWidth; LONG BiHeight; WORD BiPlanes; WORD BiBitCount; DWORD BiCompression; DWORD BiSizeImage; LONG BiXpelsPerMeter; LONG BiYpelsPerMeter; DWORD BiClrUsed; DWORD BiClrImportant; } BMPHEAD; #pragma pack() int MakeBMP(FILE *ifp,FILE *ofp); int main(int ac,char **av) { FILE *ifp; FILE *ofp; if(ac < 3) { fprintf(stderr, "Usage: makebmp <infile> <outfile>\n"); exit(1); } ifp = fopen(av[1], "rb"); if(!ifp) { fprintf(stderr, "Can't open file: %s\n", av[1]); exit(1); } ofp = fopen(av[2], "wb"); if(!ofp) { fprintf(stderr, "Can't create file: %s\n", av[2]); exit(1); } if(!MakeBMP(ifp, ofp)) { fprintf(stderr, "Conversion failed: %s\n", av[2]); fclose(ofp); unlink(av[2]); exit(1); } fclose(ifp); fclose(ofp); return 0; } /* create a bmp file*/ int MakeBMP(FILE *ifp, FILE *ofp) { BMPHEAD bmp; int i, j; int cx, cy, extra, bitdepth, ncolors; cx = 640; cy = 480; extra = (cx + 3) & 3; bitdepth = 8; if(bitdepth <= 8) ncolors = 1<<bitdepth; else ncolors = 0; memset(&bmp, 0, sizeof(bmp)); bmp.bfType[0] = 'B'; bmp.bfType[1] = 'M'; bmp.bfSize = sizeof(bmp) + ncolors*4 + (long)cx*cy; bmp.bfOffBits = sizeof(bmp) + ncolors*4; bmp.BiSize = 40; bmp.BiWidth = cx; bmp.BiHeight = cy; bmp.BiPlanes = 1; bmp.BiBitCount = bitdepth; bmp.BiCompression = BI_RGB; //bmp.BiSizeImage = ??; bmp.BiClrUsed = ncolors; bmp.BiClrImportant = ncolors; /* write header*/ fwrite(&bmp, sizeof(bmp), 1, ofp); /* write palette*/ if(bitdepth <= 8) { for(i=0; i<ncolors; i++) { unsigned char r, g, b; r = getc(ifp); g = getc(ifp); b = getc(ifp); putc(b, ofp); putc(g, ofp); putc(r, ofp); putc(0, ofp); } } /* write image data, upside down ;)*/ for(i=cy-1; i>0; --i) { long base = sizeof(bmp) + ncolors*4 + (long)i*cx; fseek(ofp, base, SEEK_SET); for(j=0; j<cx; ++j) putc(getc(ifp), ofp); for(j=0; j<extra; ++j) putc(0, ofp); /* DWORD pad each line*/ } return 1; }
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