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- /****************************************************************************
- * dump.c
- *
- * This module contains the code to read and write the dump file format.
- * 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))
- *
- * from Persistence of Vision Raytracer
- * Copyright 1993 Persistence of Vision Team
- *---------------------------------------------------------------------------
- * NOTICE: This source code file is provided so that users may experiment
- * with enhancements to POV-Ray and to port the software to platforms other
- * than those supported by the POV-Ray Team. There are strict rules under
- * which you are permitted to use this file. The rules are in the file
- * named POVLEGAL.DOC which should be distributed with this file. If
- * POVLEGAL.DOC is not available or for more info please contact the POV-Ray
- * Team Coordinator by leaving a message in CompuServe's Graphics Developer's
- * Forum. The latest version of POV-Ray may be found there as well.
- *
- * This program is based on the popular DKB raytracer version 2.12.
- * DKBTrace was originally written by David K. Buck.
- * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
- *
- *****************************************************************************/
-
- #include "frame.h"
- #include "povproto.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, READ_FILE_STRING)) == 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, WRITE_FILE_STRING)) == 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, APPEND_FILE_STRING)) == 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, APPEND_FILE_STRING,
- 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;
- {
- if(handle->file)
- 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, READ_FILE_STRING)) == 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);
- }
- }
-