////////////////////////////////////////////////////////// // bmpio.cpp ////////////////////////////////////////////////////////// #include <fstream.h> #include "bmpio.h" #include "rasterop.h" static unsigned char bmpHeader[62] = { 'B', 'M', 0x6E, 0x1B, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3E, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x60, 0x09, 0x00, 0x00, 0xE4, 0x0C, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00 }; int bmp_save( char *filename, BMPINFO *pbmpinfo ) { int starty = 0; int endy = pbmpinfo->height - 1; int bpl = (pbmpinfo->width + 7) / 8; if( pbmpinfo->cropy ) { unsigned char *p = pbmpinfo->bits; int i = 0; while( !*p && starty <= endy ) { i++; if( i >= bpl ) { starty++; i = 0; } p++; } p = pbmpinfo->bits + bpl * pbmpinfo->height; i = bpl; while( !*--p && starty <= endy ) { if( --i <= 0 ) { endy--; i = bpl; } } } ofstream ofBmp; ofBmp.open( filename, ios::out | ios::binary ); if( starty <= endy ) { unsigned long w = pbmpinfo->width; unsigned long h = endy - starty + 1; if( pbmpinfo->scalex > 1 || pbmpinfo->scaley > 1 ) { if( starty + h < pbmpinfo->height && h % pbmpinfo->scaley ) h ++; bit_res( pbmpinfo->bits + bpl * starty, w, h, (w + pbmpinfo->scalex - 1) / pbmpinfo->scalex, (h + pbmpinfo->scaley - 1) / pbmpinfo->scaley ); w = (w + pbmpinfo->scalex - 1) / pbmpinfo->scalex; h = (h + pbmpinfo->scaley - 1) / pbmpinfo->scaley; } ofBmp.write( bmpHeader, 18 ); ofBmp.put( char( w & 0x000000FF) ); ofBmp.put( char((w>> 8) & 0x000000FF) ); ofBmp.put( char((w>>16) & 0x000000FF) ); ofBmp.put( char((w>>24) & 0x000000FF) ); ofBmp.put( char( h & 0x000000FF) ); ofBmp.put( char((h>> 8) & 0x000000FF) ); ofBmp.put( char((h>>16) & 0x000000FF) ); ofBmp.put( char((h>>24) & 0x000000FF) ); ofBmp.write( bmpHeader + 26, sizeof(bmpHeader) - 26 ); bit_neg( pbmpinfo->bits + bpl * starty, bpl * h ); unsigned char *p = pbmpinfo->bits + bpl * (starty + h); int bpl2 = (w + 7) / 8; for( unsigned y = 0; y < h; y++ ) { p -= bpl; ofBmp.write( p, bpl2 ); switch( bpl2 % 4 ) { case 1: ofBmp.put( '\0' ); // fallthru case 2: ofBmp.put( '\0' ); // fallthru case 3: ofBmp.put( '\0' ); // fallthru } } } ofBmp.close(); return 0; }
file: /Techref/language/pcl/pickle/bmpio_cpp.htm, 23KB, , updated: 2001/4/5 14:55, local time: 2024/11/12 14:23,
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