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dump.c
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C/C++ Source or Header
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1991-04-30
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10KB
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363 lines
/*****************************************************************************
*
* dump.c
*
* from DKBTrace (c) 1990 David Buck
*
* This module contains the code to read and write the default file format
* generated by DKBTrace. The format is as follows:
*
*
* (header:)
* wwww hhhh - Width, Height (16 bits, LSB first)
*
* (each scanline:)
* llll - Line number (16 bits, LSB first)
* rr rr rr ... - Red data for line (8 bits per pixel,
* left to right, 0-255 (255=bright, 0=dark))
* gg gg gg ... - Green data for line (8 bits per pixel,
* left to right, 0-255 (255=bright, 0=dark))
* bb bb bb ... - Blue data for line (8 bits per pixel,
* left to right, 0-255 (255=bright, 0=dark))
*
* This software is freely distributable. The source and/or object code may be
* copied or uploaded to communications services so long as this notice remains
* at the top of each file. If any changes are made to the program, you must
* clearly indicate in the documentation and in the programs startup message
* who it was who made the changes. The documentation should also describe what
* those changes were. This software may not be included in whole or in
* part into any commercial package without the express written consent of the
* author. It may, however, be included in other public domain or freely
* distributed software so long as the proper credit for the software is given.
*
* This software is provided as is without any guarantees or warranty. Although
* the author has attempted to find and correct any bugs in the software, he
* is not responsible for any damage caused by the use of the software. The
* author is under no obligation to provide service, corrections, or upgrades
* to this package.
*
* Despite all the legal stuff above, if you do find bugs, I would like to hear
* about them. Also, if you have any comments or questions, you may contact me
* at the following address:
*
* David Buck
* 22C Sonnet Cres.
* Nepean Ontario
* Canada, K2H 8W7
*
* I can also be reached on the following bulleton boards:
*
* OMX (613) 731-3419
* Mystic (613) 596-4249 or (613) 596-4772
*
* Fidonet: 1:163/109.9
* Internet: dbuck@ccs.carleton.ca
* The "You Can Call Me RAY" BBS (708) 358-5611
*
* IBM Port by Aaron A. Collins. Aaron may be reached on the following BBS'es:
*
* The "You Can Call Me RAY" BBS (708) 358-5611
* The Information Exchange BBS (708) 945-5575
*
*****************************************************************************/
#include "frame.h"
#include "dkbproto.h"
FILE_HANDLE *Get_Dump_File_Handle()
{
FILE_HANDLE *handle;
if ((handle = (FILE_HANDLE *) malloc(sizeof(FILE_HANDLE))) == NULL) {
fprintf (stderr, "Cannot allocate memory for output file handle\n");
return(NULL);
}
handle->Default_File_Name_p = Default_Dump_File_Name;
handle->Open_File_p = Open_Dump_File;
handle->Write_Line_p = Write_Dump_Line;
handle->Read_Line_p = Read_Dump_Line;
handle->Read_Image_p = Read_Dump_Image;
handle->Close_File_p = Close_Dump_File;
return (handle);
}
char *Default_Dump_File_Name()
{
return ("data.dis");
}
int Open_Dump_File (handle, name, width, height, buffer_size, mode)
FILE_HANDLE *handle;
char *name;
int *width;
int *height;
int buffer_size;
int mode;
{
int data1, data2;
handle->mode = mode;
handle->filename = name;
switch (mode) {
case READ_MODE:
if ((handle->file = fopen (name, "rb")) == NULL) {
return(0);
}
if (buffer_size != 0) {
if ((handle->buffer = malloc (buffer_size)) == NULL)
return(0);
setvbuf (handle->file, handle->buffer, _IOFBF, buffer_size);
}
if (((data1 = getc(handle->file)) == EOF)
|| ((data2 = getc(handle->file)) == EOF))
return(0);
*width = data2 * 256 + data1;
if (((data1 = getc(handle->file)) == EOF)
|| ((data2 = getc(handle->file)) == EOF))
return(0);
*height = data2 * 256 + data1;
handle->width = *width;
handle->height = *height;
handle->buffer_size = buffer_size;
break;
case WRITE_MODE:
if ((handle->file = fopen (name, "wb")) == NULL)
return(0);
if (buffer_size != 0) {
if ((handle->buffer = malloc (buffer_size)) == NULL)
return(0);
setvbuf (handle->file, handle->buffer, _IOFBF, buffer_size);
}
putc(*width % 256, handle->file); /* write to either type of file */
putc(*width / 256, handle->file);
putc(*height % 256, handle->file);
putc(*height / 256, handle->file);
handle->width = *width;
handle->height = *height;
handle->buffer_size = buffer_size;
break;
case APPEND_MODE:
if ((handle->file = fopen (name, "ab")) == NULL)
return(0);
if (buffer_size != 0) {
if ((handle->buffer = malloc (buffer_size)) == NULL)
return(0);
setvbuf (handle->file, handle->buffer, _IOFBF, buffer_size);
}
handle->buffer_size = buffer_size;
break;
}
return(1);
}
void Write_Dump_Line (handle, line_data, line_number)
FILE_HANDLE *handle;
COLOUR *line_data;
int line_number;
{
register int x;
putc(line_number % 256, handle->file);
putc(line_number / 256, handle->file);
for (x = 0 ; x < handle->width ; x++)
putc((int) floor (line_data[x].Red * 255.0), handle->file);
for (x = 0 ; x < handle->width ; x++)
putc((int) floor (line_data[x].Green * 255.0), handle->file);
for (x = 0 ; x < handle->width ; x++)
putc((int) floor (line_data[x].Blue * 255.0), handle->file);
if (handle->buffer_size == 0) {
fflush(handle->file); /* close and reopen file for */
handle->file = freopen(handle->filename, "ab",
handle->file); /* integrity in case we crash*/
}
}
int Read_Dump_Line (handle, line_data, line_number)
FILE_HANDLE *handle;
COLOUR *line_data;
int *line_number;
{
int data, i, c;
if ((c = getc(handle->file)) == EOF) {
return (0);
}
*line_number = c;
if ((c = getc(handle->file)) == EOF)
return (-1);
*line_number += c*256;
for (i = 0 ; i < handle->width ; i++) {
if ((data = getc(handle->file)) == EOF)
return(-1);
line_data[i].Red = (DBL) data / 255.0;
}
for (i = 0 ; i < handle->width ; i++) {
if ((data = getc(handle->file)) == EOF)
return(-1);
line_data[i].Green = (DBL) data / 255.0;
}
for (i = 0 ; i < handle->width ; i++) {
if ((data = getc(handle->file)) == EOF)
return(-1);
line_data[i].Blue = (DBL) data / 255.0;
}
return (1);
}
int Read_Dump_Int_Line (handle, line_data, line_number)
FILE_HANDLE *handle;
IMAGE_LINE *line_data;
int *line_number;
{
int data, i, c;
if ((c = getc(handle->file)) == EOF) {
return (0);
}
*line_number = c;
if ((c = getc(handle->file)) == EOF)
return (-1);
*line_number += c*256;
if (((line_data->red = (unsigned char *) malloc(handle->width))==NULL) ||
((line_data->green = (unsigned char *) malloc(handle->width))==NULL) ||
((line_data->blue = (unsigned char *) malloc(handle->width))==NULL)) {
fprintf (stderr, "Cannot allocate memory for picture: %s\n", handle->filename);
close_all();
exit(1);
}
for (i = 0 ; i < handle->width ; i++) {
line_data->red[i] = 0;
line_data->green[i] = 0;
line_data->blue[i] = 0;
}
for (i = 0 ; i < handle->width ; i++) {
if ((data = getc(handle->file)) == EOF)
return(-1);
line_data->red[i] = (unsigned char) data;
}
for (i = 0 ; i < handle->width ; i++) {
if ((data = getc(handle->file)) == EOF)
return(-1);
line_data->green[i] = (unsigned char) data;
}
for (i = 0 ; i < handle->width ; i++) {
if ((data = getc(handle->file)) == EOF)
return(-1);
line_data->blue[i] = (unsigned char) data;
}
return (1);
}
void Close_Dump_File (handle)
FILE_HANDLE *handle;
{
fclose (handle->file);
if (handle->buffer_size != 0)
free (handle->buffer);
}
void Read_Dump_Image(Image, name)
IMAGE *Image;
char *name;
{
int rc, row, data1, data2;
struct Image_Line line;
FILE_HANDLE handle;
if ((handle.file = Locate_File (name, "rb")) == NULL) {
fprintf (stderr, "Cannot open dump file %s\n", name);
close_all();
exit(1);
}
if (((data1 = getc(handle.file)) == EOF)
|| ((data2 = getc(handle.file)) == EOF)) {
fprintf (stderr, "Cannot open dump file %s\n", name);
close_all();
exit(1);
}
Image->iwidth = data2 * 256 + data1;
handle.width = Image->iwidth;
if (((data1 = getc(handle.file)) == EOF)
|| ((data2 = getc(handle.file)) == EOF)) {
fprintf (stderr, "Cannot open dump file %s\n", name);
close_all();
exit(1);
}
Image->iheight = data2 * 256 + data1;
handle.height = Image->iheight;
Image->width = (DBL)Image->iwidth;
Image->height = (DBL)Image->iheight;
Image->Colour_Map_Size = 0;
Image->Colour_Map = NULL;
if ((Image->data.rgb_lines = (struct Image_Line *)
malloc(Image->iheight * sizeof (struct Image_Line))) == NULL) {
fprintf (stderr, "Cannot allocate memory for picture: %s\n", name);
exit(1);
}
while ((rc = Read_Dump_Int_Line(&handle, &line, &row)) == 1)
Image->data.rgb_lines[row] = line;
fclose (handle.file);
if (rc == 0)
return;
else {
close_all();
exit(1);
}
}