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Initial checkin of Pika from heckimp

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Cassowary
2023-09-25 15:35:21 -07:00
commit 891e999216
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27
plug-ins/file-sgi/meson.build Normal file
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plugin_name = 'file-sgi'
plugin_sources = [
'sgi-lib.c',
'sgi.c',
]
if platform_windows
plugin_sources += windows.compile_resources(
pika_plugins_rc,
args: [
'--define', 'ORIGINALFILENAME_STR="@0@"'.format(plugin_name+'.exe'),
'--define', 'INTERNALNAME_STR="@0@"' .format(plugin_name),
'--define', 'TOP_SRCDIR="@0@"' .format(meson.project_source_root()),
],
include_directories: [
rootInclude, appInclude,
],
)
endif
executable(plugin_name,
plugin_sources,
dependencies: libpikaui_dep,
install: true,
install_dir: pikaplugindir / 'plug-ins' / plugin_name,
)

960
plug-ins/file-sgi/sgi-lib.c Normal file
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/*
* SGI image file format library routines.
*
* Copyright 1997-1998 Michael Sweet (mike@easysw.com)
*
* 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 version 3 of the License, or (at your option)
* any later 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, see <https://www.gnu.org/licenses/>.
*
* Contents:
*
* sgiClose() - Close an SGI image file.
* sgiGetRow() - Get a row of image data from a file.
* sgiOpen() - Open an SGI image file for reading or writing.
* sgiOpenFile() - Open an SGI image file for reading or writing.
* sgiPutRow() - Put a row of image data to a file.
* getlong() - Get a 32-bit big-endian integer.
* getshort() - Get a 16-bit big-endian integer.
* putlong() - Put a 32-bit big-endian integer.
* putshort() - Put a 16-bit big-endian integer.
* read_rle8() - Read 8-bit RLE data.
* read_rle16() - Read 16-bit RLE data.
* write_rle8() - Write 8-bit RLE data.
* write_rle16() - Write 16-bit RLE data.
*
* Revision History:
*
* $Log$
* Revision 1.9 2005/03/04 13:23:31 neo
* 2005-03-04 Sven Neumann <sven@gimp.org>
*
* * plug-ins/FractalExplorer
* * plug-ins/Lighting
* * plug-ins/bmp
* * plug-ins/dbbrowser
* * plug-ins/faxg3
* * plug-ins/fits
* * plug-ins/flame
* * plug-ins/gfig
* * plug-ins/gflare
* * plug-ins/gfli
* * plug-ins/pikaressionist
* * plug-ins/ifscompose
* * plug-ins/jpeg
* * plug-ins/maze
* * plug-ins/pagecurl
* * plug-ins/print
* * plug-ins/rcm
* * plug-ins/script-fu
* * plug-ins/sel2path
* * plug-ins/sgi
* * plug-ins/twain
* * plug-ins/winicon
* * plug-ins/xjt: ported to gstdio, removed unnecessary includes,
* minor fixes to filename handling here and there.
*
* Revision 1.8 2003/04/07 11:59:33 neo
* 2003-04-07 Sven Neumann <sven@gimp.org>
*
* * plug-ins/sgi/sgi.h
* * plug-ins/sgi/sgilib.c: applied a patch from marek@aki.cz that
* adds support for reading SGI files in little-endian format. Fixes
* bug #106610.
*
* Revision 1.7 1998/06/06 23:22:21 yosh
* * adding Lighting plugin
*
* * updated despeckle, png, sgi, and sharpen
*
* -Yosh
*
* Revision 1.5 1998/04/23 17:40:49 mike
* Updated to support 16-bit <unsigned> image data.
*
* Revision 1.4 1998/02/05 17:10:58 mike
* Added sgiOpenFile() function for opening an existing file pointer.
*
* Revision 1.3 1997/07/02 16:40:16 mike
* sgiOpen() wasn't opening files with "rb" or "wb+". This caused problems
* on PCs running Windows/DOS...
*
* Revision 1.2 1997/06/18 00:55:28 mike
* Updated to hold length table when writing.
* Updated to hold current length when doing ARLE.
* Wasn't writing length table on close.
* Wasn't saving new line into arle_row when necessary.
*
* Revision 1.1 1997/06/15 03:37:19 mike
* Initial revision
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <glib.h>
#include <glib/gstdio.h>
#include "sgi-lib.h"
/*
* Local functions...
*/
static int getlong(sgi_t*);
static int getshort(sgi_t*);
static int putlong(long, sgi_t*);
static int putshort(unsigned short, sgi_t*);
static int read_rle8(sgi_t*, unsigned short *, int);
static int read_rle16(sgi_t*, unsigned short *, int);
static int write_rle8(sgi_t*, unsigned short *, int);
static int write_rle16(sgi_t*, unsigned short *, int);
/*
* 'sgiClose()' - Close an SGI image file.
*/
int
sgiClose(sgi_t *sgip) /* I - SGI image */
{
int i; /* Return status */
long *offset; /* Looping var for offset table */
if (sgip == NULL)
return (-1);
if (sgip->mode == SGI_WRITE && sgip->comp != SGI_COMP_NONE)
{
/*
* Write the scanline offset table to the file...
*/
fseek(sgip->file, 512, SEEK_SET);
for (i = sgip->ysize * sgip->zsize, offset = sgip->table[0];
i > 0;
i --, offset ++)
if (putlong(offset[0], sgip) < 0)
return (-1);
for (i = sgip->ysize * sgip->zsize, offset = sgip->length[0];
i > 0;
i --, offset ++)
if (putlong(offset[0], sgip) < 0)
return (-1);
};
if (sgip->table != NULL)
{
free(sgip->table[0]);
free(sgip->table);
};
if (sgip->length != NULL)
{
free(sgip->length[0]);
free(sgip->length);
};
if (sgip->comp == SGI_COMP_ARLE)
free(sgip->arle_row);
i = fclose(sgip->file);
free(sgip);
return (i);
}
/*
* 'sgiGetRow()' - Get a row of image data from a file.
*/
int
sgiGetRow(sgi_t *sgip, /* I - SGI image */
unsigned short *row, /* O - Row to read */
int y, /* I - Line to read */
int z) /* I - Channel to read */
{
int x; /* X coordinate */
long offset; /* File offset */
if (sgip == NULL ||
row == NULL ||
y < 0 || y >= sgip->ysize ||
z < 0 || z >= sgip->zsize)
return (-1);
switch (sgip->comp)
{
case SGI_COMP_NONE :
/*
* Seek to the image row - optimize buffering by only seeking if
* necessary...
*/
offset = 512 + (y + z * sgip->ysize) * sgip->xsize * sgip->bpp;
if (offset != ftell(sgip->file))
fseek(sgip->file, offset, SEEK_SET);
if (sgip->bpp == 1)
{
for (x = sgip->xsize; x > 0; x --, row ++)
*row = getc(sgip->file);
}
else
{
for (x = sgip->xsize; x > 0; x --, row ++)
*row = getshort(sgip);
};
break;
case SGI_COMP_RLE :
offset = sgip->table[z][y];
if (offset != ftell(sgip->file))
fseek(sgip->file, offset, SEEK_SET);
if (sgip->bpp == 1)
return (read_rle8(sgip, row, sgip->xsize));
else
return (read_rle16(sgip, row, sgip->xsize));
break;
};
return (0);
}
/*
* 'sgiOpen()' - Open an SGI image file for reading or writing.
*/
sgi_t *
sgiOpen(const char *filename, /* I - File to open */
int mode, /* I - Open mode (SGI_READ or SGI_WRITE) */
int comp, /* I - Type of compression */
int bpp, /* I - Bytes per pixel */
int xsize, /* I - Width of image in pixels */
int ysize, /* I - Height of image in pixels */
int zsize) /* I - Number of channels */
{
sgi_t *sgip; /* New SGI image file */
FILE *file; /* Image file pointer */
if (mode == SGI_READ)
file = g_fopen(filename, "rb");
else
file = g_fopen(filename, "w+b");
if (file == NULL)
return (NULL);
if ((sgip = sgiOpenFile(file, mode, comp, bpp, xsize, ysize, zsize)) == NULL)
fclose(file);
return (sgip);
}
/*
* 'sgiOpenFile()' - Open an SGI image file for reading or writing.
*/
sgi_t *
sgiOpenFile(FILE *file, /* I - File to open */
int mode, /* I - Open mode (SGI_READ or SGI_WRITE) */
int comp, /* I - Type of compression */
int bpp, /* I - Bytes per pixel */
int xsize, /* I - Width of image in pixels */
int ysize, /* I - Height of image in pixels */
int zsize) /* I - Number of channels */
{
int i, j; /* Looping var */
char name[80]; /* Name of file in image header */
short magic; /* Magic number */
sgi_t *sgip; /* New image pointer */
if ((sgip = calloc(sizeof(sgi_t), 1)) == NULL)
return (NULL);
sgip->file = file;
sgip->swapBytes = 0;
switch (mode)
{
case SGI_READ :
sgip->mode = SGI_READ;
magic = getshort(sgip);
if (magic != SGI_MAGIC)
{
/* try little endian format */
magic = ((magic >> 8) & 0x00ff) | ((magic << 8) & 0xff00);
if(magic != SGI_MAGIC) {
free(sgip);
return (NULL);
} else {
sgip->swapBytes = 1;
}
}
sgip->comp = getc(sgip->file);
sgip->bpp = getc(sgip->file);
getshort(sgip); /* Dimensions */
sgip->xsize = getshort(sgip);
sgip->ysize = getshort(sgip);
sgip->zsize = getshort(sgip);
getlong(sgip); /* Minimum pixel */
getlong(sgip); /* Maximum pixel */
if (sgip->comp)
{
/*
* This file is compressed; read the scanline tables...
*/
fseek(sgip->file, 512, SEEK_SET);
sgip->table = calloc(sgip->zsize, sizeof(long *));
if (sgip->table == NULL)
{
free(sgip);
return (NULL);
}
sgip->table[0] = calloc(sgip->ysize * sgip->zsize, sizeof(long));
if (sgip->table[0] == NULL)
{
free(sgip->table);
free(sgip);
return (NULL);
}
for (i = 1; i < sgip->zsize; i ++)
sgip->table[i] = sgip->table[0] + i * sgip->ysize;
for (i = 0; i < sgip->zsize; i ++)
for (j = 0; j < sgip->ysize; j ++)
sgip->table[i][j] = getlong(sgip);
};
break;
case SGI_WRITE :
if (xsize < 1 ||
ysize < 1 ||
zsize < 1 ||
bpp < 1 || bpp > 2 ||
comp < SGI_COMP_NONE || comp > SGI_COMP_ARLE)
{
free(sgip);
return (NULL);
};
sgip->mode = SGI_WRITE;
putshort(SGI_MAGIC, sgip);
putc((sgip->comp = comp) != 0, sgip->file);
putc(sgip->bpp = bpp, sgip->file);
putshort(3, sgip); /* Dimensions */
putshort(sgip->xsize = xsize, sgip);
putshort(sgip->ysize = ysize, sgip);
putshort(sgip->zsize = zsize, sgip);
if (bpp == 1)
{
putlong(0, sgip); /* Minimum pixel */
putlong(255, sgip); /* Maximum pixel */
}
else
{
putlong(-32768, sgip); /* Minimum pixel */
putlong(32767, sgip); /* Maximum pixel */
};
putlong(0, sgip); /* Reserved */
memset(name, 0, sizeof(name));
fwrite(name, sizeof(name), 1, sgip->file);
for (i = 0; i < 102; i ++)
putlong(0, sgip);
switch (comp)
{
case SGI_COMP_NONE : /* No compression */
/*
* This file is uncompressed. To avoid problems with sparse files,
* we need to write blank pixels for the entire image...
*/
if (bpp == 1)
{
for (i = xsize * ysize * zsize; i > 0; i --)
putc(0, sgip->file);
}
else
{
for (i = xsize * ysize * zsize; i > 0; i --)
putshort(0, sgip);
};
break;
case SGI_COMP_ARLE : /* Aggressive RLE */
sgip->arle_row = (unsigned short *)calloc(xsize, sizeof(unsigned short));
if (sgip->arle_row == NULL)
{
free(sgip);
return (NULL);
}
sgip->arle_offset = 0;
case SGI_COMP_RLE : /* Run-Length Encoding */
/*
* This file is compressed; write the (blank) scanline tables...
*/
for (i = 2 * ysize * zsize; i > 0; i --)
putlong(0, sgip);
sgip->firstrow = ftell(sgip->file);
sgip->nextrow = ftell(sgip->file);
sgip->table = calloc(sgip->zsize, sizeof(long *));
if (sgip->table == NULL)
{
free(sgip->arle_row);
free(sgip);
return (NULL);
}
sgip->table[0] = calloc(sgip->ysize * sgip->zsize, sizeof(long));
if (sgip->table[0] == NULL)
{
free(sgip->table);
free(sgip->arle_row);
free(sgip);
return (NULL);
}
for (i = 1; i < sgip->zsize; i ++)
sgip->table[i] = sgip->table[0] + i * sgip->ysize;
sgip->length = calloc(sgip->zsize, sizeof(long *));
sgip->length[0] = calloc(sgip->ysize * sgip->zsize, sizeof(long));
for (i = 1; i < sgip->zsize; i ++)
sgip->length[i] = sgip->length[0] + i * sgip->ysize;
break;
};
break;
default :
free(sgip);
return (NULL);
};
return (sgip);
}
/*
* 'sgiPutRow()' - Put a row of image data to a file.
*/
int
sgiPutRow(sgi_t *sgip, /* I - SGI image */
unsigned short *row, /* I - Row to write */
int y, /* I - Line to write */
int z) /* I - Channel to write */
{
int x; /* X coordinate */
long offset; /* File offset */
if (sgip == NULL ||
row == NULL ||
y < 0 || y >= sgip->ysize ||
z < 0 || z >= sgip->zsize)
return (-1);
switch (sgip->comp)
{
case SGI_COMP_NONE :
/*
* Seek to the image row - optimize buffering by only seeking if
* necessary...
*/
offset = 512 + (y + z * sgip->ysize) * sgip->xsize * sgip->bpp;
if (offset != ftell(sgip->file))
fseek(sgip->file, offset, SEEK_SET);
if (sgip->bpp == 1)
{
for (x = sgip->xsize; x > 0; x --, row ++)
putc(*row, sgip->file);
}
else
{
for (x = sgip->xsize; x > 0; x --, row ++)
putshort(*row, sgip);
};
break;
case SGI_COMP_ARLE :
if (sgip->table[z][y] != 0)
return (-1);
/*
* First check the last row written...
*/
if (sgip->arle_offset > 0)
{
for (x = 0; x < sgip->xsize; x ++)
if (row[x] != sgip->arle_row[x])
break;
if (x == sgip->xsize)
{
sgip->table[z][y] = sgip->arle_offset;
sgip->length[z][y] = sgip->arle_length;
return (0);
};
};
/*
* If that didn't match, search all the previous rows...
*/
fseek(sgip->file, sgip->firstrow, SEEK_SET);
if (sgip->bpp == 1)
{
do
{
sgip->arle_offset = ftell(sgip->file);
if ((sgip->arle_length = read_rle8(sgip, sgip->arle_row, sgip->xsize)) < 0)
{
x = 0;
break;
};
for (x = 0; x < sgip->xsize; x ++)
if (row[x] != sgip->arle_row[x])
break;
}
while (x < sgip->xsize);
}
else
{
do
{
sgip->arle_offset = ftell(sgip->file);
if ((sgip->arle_length = read_rle16(sgip, sgip->arle_row, sgip->xsize)) < 0)
{
x = 0;
break;
};
for (x = 0; x < sgip->xsize; x ++)
if (row[x] != sgip->arle_row[x])
break;
}
while (x < sgip->xsize);
};
if (x == sgip->xsize)
{
sgip->table[z][y] = sgip->arle_offset;
sgip->length[z][y] = sgip->arle_length;
return (0);
}
else
fseek(sgip->file, 0, SEEK_END); /* Clear EOF */
case SGI_COMP_RLE :
if (sgip->table[z][y] != 0)
return (-1);
offset = sgip->table[z][y] = sgip->nextrow;
if (offset != ftell(sgip->file))
fseek(sgip->file, offset, SEEK_SET);
if (sgip->bpp == 1)
x = write_rle8(sgip, row, sgip->xsize);
else
x = write_rle16(sgip, row, sgip->xsize);
if (sgip->comp == SGI_COMP_ARLE)
{
sgip->arle_offset = offset;
sgip->arle_length = x;
memcpy(sgip->arle_row, row, sgip->xsize * sizeof(short));
};
sgip->nextrow = ftell(sgip->file);
sgip->length[z][y] = x;
return (x);
};
return (0);
}
/*
* 'getlong()' - Get a 32-bit big-endian integer.
*/
static int
getlong(sgi_t *sgip) /* I - SGI image to read from */
{
unsigned char b[4];
fread(b, 4, 1, sgip->file);
if(sgip->swapBytes)
return ((b[3] << 24) | (b[2] << 16) | (b[1] << 8) | b[0]);
else
return ((b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3]);
}
/*
* 'getshort()' - Get a 16-bit big-endian integer.
*/
static int
getshort(sgi_t *sgip) /* I - SGI image to read from */
{
unsigned char b[2];
fread(b, 2, 1, sgip->file);
if(sgip->swapBytes)
return ((b[1] << 8) | b[0]);
else
return ((b[0] << 8) | b[1]);
}
/*
* 'putlong()' - Put a 32-bit big-endian integer.
*/
static int
putlong(long n, /* I - Long to write */
sgi_t *sgip) /* I - File to write to */
{
if (putc(n >> 24, sgip->file) == EOF)
return (EOF);
if (putc(n >> 16, sgip->file) == EOF)
return (EOF);
if (putc(n >> 8, sgip->file) == EOF)
return (EOF);
if (putc(n, sgip->file) == EOF)
return (EOF);
else
return (0);
}
/*
* 'putshort()' - Put a 16-bit big-endian integer.
*/
static int
putshort(unsigned short n, /* I - Short to write */
sgi_t *sgip) /* I - File to write to */
{
if (putc(n >> 8, sgip->file) == EOF)
return (EOF);
if (putc(n, sgip->file) == EOF)
return (EOF);
else
return (0);
}
/*
* 'read_rle8()' - Read 8-bit RLE data.
*/
static int
read_rle8(sgi_t *sgip, /* I - SGI image to read from */
unsigned short *row, /* O - Data */
int xsize) /* I - Width of data in pixels */
{
int i, /* Looping var */
ch, /* Current character */
count, /* RLE count */
length; /* Number of bytes read... */
length = 0;
while (xsize > 0)
{
if ((ch = getc(sgip->file)) == EOF)
return (-1);
length ++;
count = MIN (ch & 127, xsize);
if (count == 0)
break;
if (ch & 128)
{
for (i = 0; i < count; i ++, row ++, xsize --, length ++)
*row = getc(sgip->file);
}
else
{
ch = getc(sgip->file);
length ++;
for (i = 0; i < count; i ++, row ++, xsize --)
*row = ch;
};
};
return (xsize > 0 ? -1 : length);
}
/*
* 'read_rle16()' - Read 16-bit RLE data.
*/
static int
read_rle16(sgi_t *sgip, /* I - SGI image to read from */
unsigned short *row, /* O - Data */
int xsize)/* I - Width of data in pixels */
{
int i, /* Looping var */
ch, /* Current character */
count, /* RLE count */
length; /* Number of bytes read... */
length = 0;
while (xsize > 0)
{
if ((ch = getshort(sgip)) == EOF)
return (-1);
length ++;
count = MIN (ch & 127, xsize);
if (count == 0)
break;
if (ch & 128)
{
for (i = 0; i < count; i ++, row ++, xsize --, length ++)
*row = getshort(sgip);
}
else
{
ch = getshort(sgip);
length ++;
for (i = 0; i < count; i ++, row ++, xsize --)
*row = ch;
};
};
return (xsize > 0 ? -1 : length * 2);
}
/*
* 'write_rle8()' - Write 8-bit RLE data.
*/
static int
write_rle8(sgi_t *sgip, /* I - SGI image to write to */
unsigned short *row, /* I - Data */
int xsize)/* I - Width of data in pixels */
{
int length, /* Length of output line */
count, /* Number of repeated/non-repeated pixels */
i, /* Looping var */
x; /* Looping var */
unsigned short *start, /* Start of sequence */
repeat; /* Repeated pixel */
for (x = xsize, length = 0; x > 0;)
{
start = row;
row += 2;
x -= 2;
while (x > 0 && (row[-2] != row[-1] || row[-1] != row[0]))
{
row ++;
x --;
};
row -= 2;
x += 2;
count = row - start;
while (count > 0)
{
i = count > 126 ? 126 : count;
count -= i;
if (putc(128 | i, sgip->file) == EOF)
return (-1);
length ++;
while (i > 0)
{
if (putc(*start, sgip->file) == EOF)
return (-1);
start ++;
i --;
length ++;
};
};
if (x <= 0)
break;
start = row;
repeat = row[0];
row ++;
x --;
while (x > 0 && *row == repeat)
{
row ++;
x --;
};
count = row - start;
while (count > 0)
{
i = count > 126 ? 126 : count;
count -= i;
if (putc(i, sgip->file) == EOF)
return (-1);
length ++;
if (putc(repeat, sgip->file) == EOF)
return (-1);
length ++;
};
};
length ++;
if (putc(0, sgip->file) == EOF)
return (-1);
else
return (length);
}
/*
* 'write_rle16()' - Write 16-bit RLE data.
*/
static int
write_rle16(sgi_t *sgip, /* I - SGI image to write to */
unsigned short *row,/* I - Data */
int xsize)/* I - Width of data in pixels */
{
int length, /* Length of output line */
count, /* Number of repeated/non-repeated pixels */
i, /* Looping var */
x; /* Looping var */
unsigned short *start, /* Start of sequence */
repeat; /* Repeated pixel */
for (x = xsize, length = 0; x > 0;)
{
start = row;
row += 2;
x -= 2;
while (x > 0 && (row[-2] != row[-1] || row[-1] != row[0]))
{
row ++;
x --;
};
row -= 2;
x += 2;
count = row - start;
while (count > 0)
{
i = count > 126 ? 126 : count;
count -= i;
if (putshort(128 | i, sgip) == EOF)
return (-1);
length ++;
while (i > 0)
{
if (putshort(*start, sgip) == EOF)
return (-1);
start ++;
i --;
length ++;
};
};
if (x <= 0)
break;
start = row;
repeat = row[0];
row ++;
x --;
while (x > 0 && *row == repeat)
{
row ++;
x --;
};
count = row - start;
while (count > 0)
{
i = count > 126 ? 126 : count;
count -= i;
if (putshort(i, sgip) == EOF)
return (-1);
length ++;
if (putshort(repeat, sgip) == EOF)
return (-1);
length ++;
};
};
length ++;
if (putshort(0, sgip) == EOF)
return (-1);
else
return (2 * length);
}

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/*
* SGI image file format library definitions.
*
* Copyright 1997-1998 Michael Sweet (mike@easysw.com)
*
* 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 version 3 of the License, or (at your option)
* any later 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, see <https://www.gnu.org/licenses/>.
*/
#ifndef __SGI_LIB_H__
#define __SGI_LIB_H__
G_BEGIN_DECLS
/*
* Constants...
*/
# define SGI_MAGIC 474 /* Magic number in image file */
# define SGI_READ 0 /* Read from an SGI image file */
# define SGI_WRITE 1 /* Write to an SGI image file */
# define SGI_COMP_NONE 0 /* No compression */
# define SGI_COMP_RLE 1 /* Run-length encoding */
# define SGI_COMP_ARLE 2 /* Aggressive run-length encoding */
/*
* Image structure...
*/
typedef struct
{
FILE *file; /* Image file */
int mode, /* File open mode */
bpp, /* Bytes per pixel/channel */
comp, /* Compression */
swapBytes; /* SwapBytes flag */
unsigned short xsize, /* Width in pixels */
ysize, /* Height in pixels */
zsize; /* Number of channels */
long firstrow, /* File offset for first row */
nextrow, /* File offset for next row */
**table, /* Offset table for compression */
**length; /* Length table for compression */
unsigned short *arle_row; /* Advanced RLE compression buffer */
long arle_offset, /* Advanced RLE buffer offset */
arle_length; /* Advanced RLE buffer length */
} sgi_t;
/*
* Prototypes...
*/
extern int sgiClose (sgi_t *sgip);
extern int sgiGetRow (sgi_t *sgip,
unsigned short *row,
int y,
int z);
extern sgi_t *sgiOpen (const char *filename,
int mode,
int comp,
int bpp,
int xsize,
int ysize,
int zsize);
extern sgi_t *sgiOpenFile (FILE *file,
int mode,
int comp,
int bpp,
int xsize,
int ysize,
int zsize);
extern int sgiPutRow (sgi_t *sgip,
unsigned short *row,
int y,
int z);
G_END_DECLS
#endif /* !__SGI_LIB_H__ */

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/*
* SGI image file plug-in for PIKA.
*
* Copyright 1997-1998 Michael Sweet (mike@easysw.com)
*
* 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 version 3 of the License, or (at your option)
* any later 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, see <https://www.gnu.org/licenses/>.
*
* Contents:
*
* main() - Main entry - just call pika_main()...
* query() - Respond to a plug-in query...
* run() - Run the plug-in...
* load_image() - Load a PNG image into a new image window.
* save_image() - Export the specified image to a PNG file.
* save_ok_callback() - Destroy the export dialog and export the image.
* save_dialog() - Pop up the export dialog.
*
*/
#include "config.h"
#include <string.h>
#include <libpika/pika.h>
#include <libpika/pikaui.h>
#include "sgi-lib.h"
#include "libpika/stdplugins-intl.h"
#define LOAD_PROC "file-sgi-load"
#define SAVE_PROC "file-sgi-save"
#define PLUG_IN_BINARY "file-sgi"
#define PLUG_IN_VERSION "1.1.1 - 17 May 1998"
typedef struct _Sgi Sgi;
typedef struct _SgiClass SgiClass;
struct _Sgi
{
PikaPlugIn parent_instance;
};
struct _SgiClass
{
PikaPlugInClass parent_class;
};
#define SGI_TYPE (sgi_get_type ())
#define SGI (obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), SGI_TYPE, Sgi))
GType sgi_get_type (void) G_GNUC_CONST;
static GList * sgi_query_procedures (PikaPlugIn *plug_in);
static PikaProcedure * sgi_create_procedure (PikaPlugIn *plug_in,
const gchar *name);
static PikaValueArray * sgi_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
const PikaValueArray *args,
gpointer run_data);
static PikaValueArray * sgi_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
const PikaValueArray *args,
gpointer run_data);
static PikaImage * load_image (GFile *file,
GError **error);
static gint save_image (GFile *file,
PikaImage *image,
PikaDrawable *drawable,
GObject *config,
GError **error);
static gboolean save_dialog (PikaProcedure *procedure,
GObject *config,
PikaImage *image);
G_DEFINE_TYPE (Sgi, sgi, PIKA_TYPE_PLUG_IN)
PIKA_MAIN (SGI_TYPE)
DEFINE_STD_SET_I18N
static void
sgi_class_init (SgiClass *klass)
{
PikaPlugInClass *plug_in_class = PIKA_PLUG_IN_CLASS (klass);
plug_in_class->query_procedures = sgi_query_procedures;
plug_in_class->create_procedure = sgi_create_procedure;
plug_in_class->set_i18n = STD_SET_I18N;
}
static void
sgi_init (Sgi *sgi)
{
}
static GList *
sgi_query_procedures (PikaPlugIn *plug_in)
{
GList *list = NULL;
list = g_list_append (list, g_strdup (LOAD_PROC));
list = g_list_append (list, g_strdup (SAVE_PROC));
return list;
}
static PikaProcedure *
sgi_create_procedure (PikaPlugIn *plug_in,
const gchar *name)
{
PikaProcedure *procedure = NULL;
if (! strcmp (name, LOAD_PROC))
{
procedure = pika_load_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
sgi_load, NULL, NULL);
pika_procedure_set_menu_label (procedure,
N_("Silicon Graphics IRIS image"));
pika_procedure_set_documentation (procedure,
_("Loads files in SGI image file format"),
_("This plug-in loads SGI image files."),
name);
pika_procedure_set_attribution (procedure,
"Michael Sweet <mike@easysw.com>",
"Copyright 1997-1998 by Michael Sweet",
PLUG_IN_VERSION);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-sgi");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"sgi,rgb,rgba,bw,icon");
pika_file_procedure_set_magics (PIKA_FILE_PROCEDURE (procedure),
"0,short,474");
}
else if (! strcmp (name, SAVE_PROC))
{
procedure = pika_save_procedure_new (plug_in, name,
PIKA_PDB_PROC_TYPE_PLUGIN,
sgi_save, NULL, NULL);
pika_procedure_set_image_types (procedure, "*");
pika_procedure_set_menu_label (procedure,
N_("Silicon Graphics IRIS image"));
pika_file_procedure_set_format_name (PIKA_FILE_PROCEDURE (procedure),
"SGI");
pika_procedure_set_icon_name (procedure, PIKA_ICON_BRUSH);
pika_procedure_set_documentation (procedure,
_("Exports files in SGI image file format"),
_("This plug-in exports SGI image files."),
name);
pika_procedure_set_attribution (procedure,
"Michael Sweet <mike@easysw.com>",
"Copyright 1997-1998 by Michael Sweet",
PLUG_IN_VERSION);
pika_file_procedure_set_mime_types (PIKA_FILE_PROCEDURE (procedure),
"image/x-sgi");
pika_file_procedure_set_extensions (PIKA_FILE_PROCEDURE (procedure),
"sgi,rgb,rgba,bw,icon");
PIKA_PROC_ARG_INT (procedure, "compression",
_("Compression _type"),
_("Compression level (0 = none, 1 = RLE, 2 = ARLE)"),
0, 2, SGI_COMP_RLE,
PIKA_PARAM_READWRITE);
}
return procedure;
}
static PikaValueArray *
sgi_load (PikaProcedure *procedure,
PikaRunMode run_mode,
GFile *file,
const PikaValueArray *args,
gpointer run_data)
{
PikaValueArray *return_vals;
PikaImage *image;
GError *error = NULL;
gegl_init (NULL, NULL);
image = load_image (file, &error);
if (! image)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_EXECUTION_ERROR,
error);
return_vals = pika_procedure_new_return_values (procedure,
PIKA_PDB_SUCCESS,
NULL);
PIKA_VALUES_SET_IMAGE (return_vals, 1, image);
return return_vals;
}
static PikaValueArray *
sgi_save (PikaProcedure *procedure,
PikaRunMode run_mode,
PikaImage *image,
gint n_drawables,
PikaDrawable **drawables,
GFile *file,
const PikaValueArray *args,
gpointer run_data)
{
PikaProcedureConfig *config;
PikaPDBStatusType status = PIKA_PDB_SUCCESS;
PikaExportReturn export = PIKA_EXPORT_CANCEL;
GError *error = NULL;
gegl_init (NULL, NULL);
config = pika_procedure_create_config (procedure);
pika_procedure_config_begin_run (config, image, run_mode, args);
switch (run_mode)
{
case PIKA_RUN_INTERACTIVE:
case PIKA_RUN_WITH_LAST_VALS:
pika_ui_init (PLUG_IN_BINARY);
export = pika_export_image (&image, &n_drawables, &drawables, "SGI",
PIKA_EXPORT_CAN_HANDLE_RGB |
PIKA_EXPORT_CAN_HANDLE_GRAY |
PIKA_EXPORT_CAN_HANDLE_INDEXED |
PIKA_EXPORT_CAN_HANDLE_ALPHA);
if (export == PIKA_EXPORT_CANCEL)
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CANCEL,
NULL);
break;
default:
break;
}
if (n_drawables != 1)
{
g_set_error (&error, G_FILE_ERROR, 0,
_("SGI format does not support multiple layers."));
return pika_procedure_new_return_values (procedure,
PIKA_PDB_CALLING_ERROR,
error);
}
if (run_mode == PIKA_RUN_INTERACTIVE)
{
if (! save_dialog (procedure, G_OBJECT (config), image))
status = PIKA_PDB_CANCEL;
}
if (status == PIKA_PDB_SUCCESS)
{
if (! save_image (file, image, drawables[0],
G_OBJECT (config), &error))
{
status = PIKA_PDB_EXECUTION_ERROR;
}
}
pika_procedure_config_end_run (config, status);
g_object_unref (config);
if (export == PIKA_EXPORT_EXPORT)
{
pika_image_delete (image);
g_free (drawables);
}
return pika_procedure_new_return_values (procedure, status, error);
}
static PikaImage *
load_image (GFile *file,
GError **error)
{
gint i, /* Looping var */
x, /* Current X coordinate */
y, /* Current Y coordinate */
image_type, /* Type of image */
layer_type, /* Type of drawable/layer */
tile_height, /* Height of tile in PIKA */
count, /* Count of rows to put in image */
bytes; /* Number of channels to use */
sgi_t *sgip; /* File pointer */
PikaImage *image; /* Image */
PikaLayer *layer; /* Layer */
GeglBuffer *buffer; /* Buffer for layer */
guchar **pixels, /* Pixel rows */
*pptr; /* Current pixel */
gushort **rows; /* SGI image data */
PikaPrecision precision;
const Babl *bablfmt = NULL;
/*
* Open the file for reading...
*/
pika_progress_init_printf (_("Opening '%s'"),
pika_file_get_utf8_name (file));
sgip = sgiOpen (g_file_peek_path (file), SGI_READ, 0, 0, 0, 0, 0);
if (! sgip)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Could not open '%s' for reading."),
pika_file_get_utf8_name (file));
free (sgip);
return NULL;
};
/*
* Get the image dimensions and create the image...
*/
/* Sanitize dimensions (note that they are unsigned short and can
* thus never be larger than PIKA_MAX_IMAGE_SIZE
*/
if (sgip->xsize == 0 /*|| sgip->xsize > PIKA_MAX_IMAGE_SIZE*/)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Invalid width: %hu"), sgip->xsize);
free (sgip);
return NULL;
}
if (sgip->ysize == 0 /*|| sgip->ysize > PIKA_MAX_IMAGE_SIZE*/)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Invalid height: %hu"), sgip->ysize);
free (sgip);
return NULL;
}
if (sgip->zsize == 0 /*|| sgip->zsize > PIKA_MAX_IMAGE_SIZE*/)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Invalid number of channels: %hu"), sgip->zsize);
free (sgip);
return NULL;
}
bytes = sgip->zsize;
switch (sgip->zsize)
{
case 1 : /* Grayscale */
image_type = PIKA_GRAY;
layer_type = PIKA_GRAY_IMAGE;
if (sgip->bpp == 1)
{
precision = PIKA_PRECISION_U8_NON_LINEAR;
bablfmt = babl_format ("Y' u8");
}
else
{
precision = PIKA_PRECISION_U16_NON_LINEAR;
bablfmt = babl_format ("Y' u16");
}
break;
case 2 : /* Grayscale + alpha */
image_type = PIKA_GRAY;
layer_type = PIKA_GRAYA_IMAGE;
if (sgip->bpp == 1)
{
precision = PIKA_PRECISION_U8_NON_LINEAR;
bablfmt = babl_format ("Y'A u8");
}
else
{
precision = PIKA_PRECISION_U16_NON_LINEAR;
bablfmt = babl_format ("Y'A u16");
}
break;
case 3 : /* RGB */
image_type = PIKA_RGB;
layer_type = PIKA_RGB_IMAGE;
if (sgip->bpp == 1)
{
precision = PIKA_PRECISION_U8_NON_LINEAR;
bablfmt = babl_format ("R'G'B' u8");
}
else
{
precision = PIKA_PRECISION_U16_NON_LINEAR;
bablfmt = babl_format ("R'G'B' u16");
}
break;
case 4 : /* RGBA */
image_type = PIKA_RGB;
layer_type = PIKA_RGBA_IMAGE;
if (sgip->bpp == 1)
{
precision = PIKA_PRECISION_U8_NON_LINEAR;
bablfmt = babl_format ("R'G'B'A u8");
}
else
{
precision = PIKA_PRECISION_U16_NON_LINEAR;
bablfmt = babl_format ("R'G'B'A u16");
}
break;
default:
image_type = PIKA_RGB;
layer_type = PIKA_RGBA_IMAGE;
bytes = 4;
if (sgip->bpp == 1)
{
precision = PIKA_PRECISION_U8_NON_LINEAR;
bablfmt = babl_format ("R'G'B'A u8");
}
else
{
precision = PIKA_PRECISION_U16_NON_LINEAR;
bablfmt = babl_format ("R'G'B'A u16");
}
break;
}
image = pika_image_new_with_precision (sgip->xsize, sgip->ysize,
image_type, precision);
if (! image)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
"Could not allocate new image: %s",
pika_pdb_get_last_error (pika_get_pdb ()));
free (sgip);
return NULL;
}
/*
* Create the "background" layer to hold the image...
*/
layer = pika_layer_new (image, _("Background"), sgip->xsize, sgip->ysize,
layer_type,
100,
pika_image_get_default_new_layer_mode (image));
pika_image_insert_layer (image, layer, NULL, 0);
/*
* Get the drawable and set the pixel region for our load...
*/
buffer = pika_drawable_get_buffer (PIKA_DRAWABLE (layer));
/*
* Temporary buffers...
*/
tile_height = pika_tile_height ();
pixels = g_new (guchar *, tile_height);
pixels[0] = g_new (guchar, ((gsize) tile_height) * sgip->xsize * sgip->bpp * bytes);
for (i = 1; i < tile_height; i ++)
pixels[i] = pixels[0] + sgip->xsize * sgip->bpp * bytes * i;
rows = g_new (unsigned short *, sgip->zsize);
rows[0] = g_new (unsigned short, ((gsize) sgip->xsize) * sgip->zsize);
for (i = 1; i < sgip->zsize; i ++)
rows[i] = rows[0] + i * sgip->xsize;
/*
* Load the image...
*/
for (y = 0, count = 0;
y < sgip->ysize;
y ++, count ++)
{
if (count >= tile_height)
{
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y - count,
sgip->xsize, count), 0,
bablfmt, pixels[0], GEGL_AUTO_ROWSTRIDE);
count = 0;
pika_progress_update ((double) y / (double) sgip->ysize);
}
for (i = 0; i < sgip->zsize; i ++)
if (sgiGetRow (sgip, rows[i], sgip->ysize - 1 - y, i) < 0)
g_printerr ("sgiGetRow(sgip, rows[i], %d, %d) failed!\n",
sgip->ysize - 1 - y, i);
if (sgip->bpp == 1)
{
/*
* 8-bit (unsigned) pixels...
*/
for (x = 0, pptr = pixels[count]; x < sgip->xsize; x ++)
for (i = 0; i < bytes; i ++, pptr ++)
*pptr = rows[i][x];
}
else
{
/*
* 16-bit (unsigned) pixels...
*/
guint16 *pixels16;
for (x = 0, pixels16 = (guint16 *) pixels[count]; x < sgip->xsize; x ++)
for (i = 0; i < bytes; i ++, pixels16 ++)
*pixels16 = rows[i][x];
}
}
/*
* Do the last n rows (count always > 0)
*/
gegl_buffer_set (buffer, GEGL_RECTANGLE (0, y - count,
sgip->xsize, count), 0,
bablfmt, pixels[0], GEGL_AUTO_ROWSTRIDE);
/*
* Done with the file...
*/
sgiClose (sgip);
g_free (pixels[0]);
g_free (pixels);
g_free (rows[0]);
g_free (rows);
g_object_unref (buffer);
pika_progress_update (1.0);
return image;
}
static gint
save_image (GFile *file,
PikaImage *image,
PikaDrawable *drawable,
GObject *config,
GError **error)
{
gint compression;
gint i, j; /* Looping var */
gint x; /* Current X coordinate */
gint y; /* Current Y coordinate */
gint width; /* Drawable width */
gint height; /* Drawable height */
gint tile_height; /* Height of tile in PIKA */
gint count; /* Count of rows to put in image */
gint zsize; /* Number of channels in file */
sgi_t *sgip; /* File pointer */
GeglBuffer *buffer; /* Buffer for layer */
const Babl *format;
guchar **pixels; /* Pixel rows */
guchar *pptr; /* Current pixel */
gushort **rows; /* SGI image data */
g_object_get (config,
"compression", &compression,
NULL);
/*
* Get the drawable for the current image...
*/
width = pika_drawable_get_width (drawable);
height = pika_drawable_get_height (drawable);
buffer = pika_drawable_get_buffer (drawable);
switch (pika_drawable_type (drawable))
{
case PIKA_GRAY_IMAGE:
zsize = 1;
format = babl_format ("Y' u8");
break;
case PIKA_GRAYA_IMAGE:
zsize = 2;
format = babl_format ("Y'A u8");
break;
case PIKA_RGB_IMAGE:
case PIKA_INDEXED_IMAGE:
zsize = 3;
format = babl_format ("R'G'B' u8");
break;
case PIKA_RGBA_IMAGE:
case PIKA_INDEXEDA_IMAGE:
format = babl_format ("R'G'B'A u8");
zsize = 4;
break;
default:
return FALSE;
}
/*
* Open the file for writing...
*/
pika_progress_init_printf (_("Exporting '%s'"),
pika_file_get_utf8_name (file));
sgip = sgiOpen (g_file_peek_path (file), SGI_WRITE, compression, 1,
width, height, zsize);
if (! sgip)
{
g_set_error (error, G_FILE_ERROR, G_FILE_ERROR_FAILED,
_("Could not open '%s' for writing."),
pika_file_get_utf8_name (file));
return FALSE;
};
/*
* Allocate memory for "tile_height" rows...
*/
tile_height = pika_tile_height ();
pixels = g_new (guchar *, tile_height);
pixels[0] = g_new (guchar, ((gsize) tile_height) * width * zsize);
for (i = 1; i < tile_height; i ++)
pixels[i]= pixels[0] + width * zsize * i;
rows = g_new (gushort *, sgip->zsize);
rows[0] = g_new (gushort, ((gsize) sgip->xsize) * sgip->zsize);
for (i = 1; i < sgip->zsize; i ++)
rows[i] = rows[0] + i * sgip->xsize;
/*
* Save the image...
*/
for (y = 0; y < height; y += count)
{
/*
* Grab more pixel data...
*/
if ((y + tile_height) >= height)
count = height - y;
else
count = tile_height;
gegl_buffer_get (buffer, GEGL_RECTANGLE (0, y, width, count), 1.0,
format, pixels[0],
GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
/*
* Convert to shorts and write each color plane separately...
*/
for (i = 0, pptr = pixels[0]; i < count; i ++)
{
for (x = 0; x < width; x ++)
for (j = 0; j < zsize; j ++, pptr ++)
rows[j][x] = *pptr;
for (j = 0; j < zsize; j ++)
sgiPutRow (sgip, rows[j], height - 1 - y - i, j);
};
pika_progress_update ((double) y / (double) height);
}
/*
* Done with the file...
*/
sgiClose (sgip);
g_free (pixels[0]);
g_free (pixels);
g_free (rows[0]);
g_free (rows);
g_object_unref (buffer);
pika_progress_update (1.0);
return TRUE;
}
static gboolean
save_dialog (PikaProcedure *procedure,
GObject *config,
PikaImage *image)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkListStore *store;
gboolean run;
dialog = pika_save_procedure_dialog_new (PIKA_SAVE_PROCEDURE (procedure),
PIKA_PROCEDURE_CONFIG (config),
image);
store = pika_int_store_new (_("No compression"),
SGI_COMP_NONE,
_("RLE compression"),
SGI_COMP_RLE,
_("Aggressive RLE (not supported by SGI)"),
SGI_COMP_ARLE,
NULL);
pika_procedure_dialog_get_int_combo (PIKA_PROCEDURE_DIALOG (dialog),
"compression", PIKA_INT_STORE (store));
vbox = pika_procedure_dialog_fill_box (PIKA_PROCEDURE_DIALOG (dialog),
"sgi-vbox", "compression", NULL);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 12);
pika_procedure_dialog_fill (PIKA_PROCEDURE_DIALOG (dialog),
"sgi-vbox", NULL);
gtk_widget_show (dialog);
run = pika_procedure_dialog_run (PIKA_PROCEDURE_DIALOG (dialog));
gtk_widget_destroy (dialog);
return run;
}