+++ /dev/null
-/* atlc - arbitrary transmission line calculator, for the analysis of
-transmission lines are directional couplers.
-
-Copyright (C) 2002. Dr. David Kirkby, PhD (G8WRB).
-
-This program is free software; you can redistribute it and/or
-modify it under the terms of the GNU General Public License
-as published by the Free Software Foundation; either package_version 2
-of the License, or (at your option) any later package_version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-USA.
-
-Dr. David Kirkby, e-mail drkirkby at ntlworld.com
-
-*/
-
-#include "config.h"
-
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-
-#ifdef HAVE_STRINGS_H
-#include <strings.h>
-#endif
-
-#ifdef HAVE_STDLIB_H
-#include <stdlib.h>
-#endif
-
-#include "definitions.h"
-#include "exit_codes.h"
-
-unsigned char *bmp_buff;
-
-/* We make the bitmap header public, as we write it back
-later, when saving bmp files. It saves a lot of hassle,
-just writing what we read back, rather than correctly
-calculating all the data in the header correctly */
-
-/* #define DEBUG */
-
-#define BITMAP_HEADER_SIZE 0x36 /* 54 */
-
-void read_bitmap_file_headers(char *filename, int *offset, size_t *size, int *width, int *height)
-{
- FILE *fp;
-
- struct Bitmap_File_Head_Struct Bitmap_File_Head;
- struct Bitmap_Head_Struct Bitmap_Head;
- int ColormapSize, Maps;
- int length_of_file; /* Appently Photoshop versions < 7.01
- don't write this into Bitmap_Head.biSizeIm
- so it causes a problem. So we will work out
- the length by seeking to the end of the file
- and finding the position of the file
- pointer */
-
- bmp_buff=ustring(0,BITMAP_HEADER_SIZE);
- if(strcmp(filename,"-")==0)
- {
- fp=stdin;
- }
- else
- fp=fopen(filename,"rb");
-
- if(fp==NULL)
- {
- fprintf(stderr,"cannot open %s\n", filename);
- exit_with_msg_and_exit_code("",CANT_OPEN_FILE_FOR_READING);
- }
-
- /* deternine the length of the file, as its not always
- written into the bitmap. I thought it needed to be, but
- apparently it does not and photoshop versions < 7.01
- don't do it. */
- if( fseek(fp, 0, SEEK_END) == -1)
- {
- fprintf(stderr," Can't seek to the end of the file in read_bitmap_file_headers.c\n");
- exit(FSEEK_FAILURE);
- }
- if( (length_of_file=ftell(fp)) == -1)
- exit_with_msg_and_exit_code("Can't find length of file in read_bitmap_file_headers.c",FTELL_FAILURE);
-
- if( (fseek(fp, 0, SEEK_SET) ) == -1)
- {
- fprintf(stderr," Can't seek to the beggining of the file in read_bitmap_file_headers.c\n");
- exit(FSEEK_FAILURE);
- }
- /* Read the .bmp file header into a bmp_buff */
- if (!(fread(bmp_buff, 1,BITMAP_HEADER_SIZE,fp))||(strncmp((char *) bmp_buff,"BM",2)))
- {
- fprintf(stderr,"%s is not a valid BMP file\n", filename);
- exit_with_msg_and_exit_code("",NOT_A_VALID_BITMAP_FILE);
- }
-
-/* On most machines, sizeof(short)==2 and sizeof(int)==4. This is so no matter
-if the machine is 32 or 64 bis. An exception is the Cray Y-MP, which has
-sizeof(short)=8
-sizeof(int)=8
-sizeof(long)=8.
-
-In this case, it is much more difficult to write the header for the bitmap. But in
-the aid of portability, this is done. So these is a section of code that will work
-even if sizeof(short)=8 and sizeof(int)=8. See below for that. */
-
-
- /* Read the bmp_buff into the two structures we want */
-
- Bitmap_File_Head.zzMagic[0x0] = bmp_buff[0];
- Bitmap_File_Head.zzMagic[0x1] = bmp_buff[1];
- Bitmap_File_Head.bfSize = bmp_buff[0x2] + ((bmp_buff[3] + ((bmp_buff[4] + (bmp_buff[5] << 8)) << 8)) <<8);
- Bitmap_File_Head.zzHotX = bmp_buff[0x6] + (bmp_buff[7] << 8);
- Bitmap_File_Head.zzHotY = bmp_buff[0x8] + (bmp_buff[0x09] << 8);
- Bitmap_File_Head.bfOffs = bmp_buff[0x0a] + ((bmp_buff[0xb] + ((bmp_buff[0xc] + (bmp_buff[0x0d] << 8)) << 8)) <<8);
- Bitmap_File_Head.biSize = bmp_buff[0x0E] + ((bmp_buff[0x0f] + ((bmp_buff[0x10] + (bmp_buff[0x11] << 8)) << 8)) <<8);
-#ifdef DEBUG
- printf("Bitmap_File_Head.bfSize = %d \n",Bitmap_File_Head.bfSize);
- printf("Bitmap_File_Head.zzHotX = %d\n",Bitmap_File_Head.zzHotX);
- printf("Bitmap_File_Head.zzHotY = %d\n",Bitmap_File_Head.zzHotY);
- printf("Bitmap_File_Head.bfOffs = %d\n",Bitmap_File_Head.bfOffs);
- printf("Bitmap_File_Head.biSize = %d\n\n",Bitmap_File_Head.biSize);
-#endif
-
- Bitmap_Head.biWidth=bmp_buff[0x12] + ((bmp_buff[0x13] + ((bmp_buff[0x14] + (bmp_buff[0x15] << 8)) << 8)) <<8);
- Bitmap_Head.biHeight=bmp_buff[0x16] + ((bmp_buff[0x17] + ((bmp_buff[0x18] + (bmp_buff[0x19] << 8)) << 8)) <<8);
- Bitmap_Head.biPlanes = bmp_buff[0x1A] + (bmp_buff[0x1b] << 8);
- Bitmap_Head.biBitCnt = bmp_buff[0x1C] + (bmp_buff[0x1d] << 8);
- Bitmap_Head.biCompr= bmp_buff[0x1E] + ((bmp_buff[0x1f] + ((bmp_buff[0x20] + (bmp_buff[0x21] << 8)) << 8)) <<8);
- Bitmap_Head.biSizeIm=bmp_buff[0x22] + ((bmp_buff[0x23] + ((bmp_buff[0x24] + (bmp_buff[0x25] << 8)) << 8)) <<8);
- /* I thought the length of the image was always stored in Bitmap_Head.biSizeIm, but
- this appears not to be so. Hence it is now calculated from the length of the file
- */
- Bitmap_Head.biSizeIm=length_of_file-BITMAP_HEADER_SIZE;
- Bitmap_Head.biXPels = bmp_buff[0x26] + ((bmp_buff[0x27] + ((bmp_buff[0x28] + (bmp_buff[0x29] << 8)) << 8)) <<8);
- Bitmap_Head.biYPels= bmp_buff[0x2A] + ((bmp_buff[0x2b] + ((bmp_buff[0x2c] + (bmp_buff[0x2d] << 8)) << 8)) <<8);
- Bitmap_Head.biClrUsed = bmp_buff[0x2E] + ((bmp_buff[0x2f] + ((bmp_buff[0x30] + (bmp_buff[0x31] << 8)) << 8)) <<8);
- Bitmap_Head.biClrImp = bmp_buff[0x32] + ((bmp_buff[0x33] + ((bmp_buff[0x34] + (bmp_buff[0x35] << 8)) << 8)) <<8);
-
- Maps=4;
- if(Bitmap_Head.biBitCnt!=24)
- {
- fprintf(stderr,"Sorry, the .bmp bitmap must have 24 bits per colour,\n");
- fprintf(stderr,"but it has %d bits. Resave the \n",Bitmap_Head.biBitCnt);
- fprintf(stderr,"image using 24-bit colour\n");
- exit_with_msg_and_exit_code("mage using 24-bit colour",BITMAP_NOT_24_BIT);
- }
-#ifdef DEBUG
- printf("Bitmap_Head.biWidth =%d =0x%x\n",Bitmap_Head.biWidth,Bitmap_Head.biWidth);
- printf("Bitmap_Head.biHeight =%d =0x%x\n",Bitmap_Head.biHeight,Bitmap_Head.biHeight);
- printf("Bitmap_Head.biPlanes =%d =0x%x\n",Bitmap_Head.biPlanes,Bitmap_Head.biPlanes);
- printf("Bitmap_Head.biBitCnt =%d =0x%x\n",Bitmap_Head.biBitCnt,Bitmap_Head.biBitCnt);
- printf("Bitmap_Head.biCompr =%d =0x%x\n",Bitmap_Head.biCompr,Bitmap_Head.biCompr );
- printf("Bitmap_Head.biSizeIm =%d =0x%x\n",Bitmap_Head.biSizeIm,Bitmap_Head.biSizeIm);
- printf("size by ftell=%d\n", length_of_file);
- printf("Bitmap_Head.biXPels =%d =0x%x\n",Bitmap_Head.biXPels,Bitmap_Head.biXPels);
- printf("Bitmap_Head.biYPels =%d =0x%x\n",Bitmap_Head.biYPels,Bitmap_Head.biYPels);
- printf("Bitmap_Head.biClrUsed =%d =0x%x\n",Bitmap_Head.biClrUsed,Bitmap_Head.biClrUsed);
- printf("Bitmap_Head.biClrImp =%d =0x%x\n",Bitmap_Head.biClrImp,Bitmap_Head.biClrImp);
-#endif
- ColormapSize = (Bitmap_File_Head.bfOffs - Bitmap_File_Head.biSize - 14) / Maps;
-
- if ((Bitmap_Head.biClrUsed == 0) && (Bitmap_Head.biBitCnt <= 8))
- Bitmap_Head.biClrUsed = ColormapSize;
-
- /* Sanity checks */
-
- if (Bitmap_Head.biHeight == 0 || Bitmap_Head.biWidth == 0)
- {
- fprintf(stderr,"error reading BMP file header of %s - width or height is zero\n",filename);
- exit_with_msg_and_exit_code("",WIDTH_OR_HEIGHT_ZERO_IN_BITMAP);
- }
- if (Bitmap_Head.biPlanes != 1)
- {
- fprintf(stderr,"error reading BMP file header of %s - bitplanes not equal to 1\n",filename);
- exit_with_msg_and_exit_code("",BITPLANES_NOT_1_IN_BITMAP);
- }
- if (ColormapSize > 256 || Bitmap_Head.biClrUsed > 256)
- {
- fprintf(stderr,"error reading BMP file header of %s - colourmap size error\n",filename);
- exit_with_msg_and_exit_code("",COLOURMAP_GREATER_THAN_256);
- }
- /* Windows and OS/2 declare filler so that rows are a multiple of
- word length (32 bits == 4 bytes)
- */
-
- /*fclose(fp); I'm not sure if this should be closed or not. Why did I ??? */
- *width=Bitmap_Head.biWidth;
- *height=Bitmap_Head.biHeight;
- *offset=Bitmap_File_Head.bfOffs;
- *size=Bitmap_Head.biSizeIm;
- if( *size < 3 * (*width) * (*height) )
- {
- fprintf(stderr,"Internal error in read_bitmap_file_headers.c\n");
- exit(1);
- }
-}
projects / debian / atlc / blobdiff