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ximg1311
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ximgview.c
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C/C++ Source or Header
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1995-07-06
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22KB
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834 lines
/* Virtual screen (X)IMG-viewer (C) 1994 by Eero Tamminen. */
/* No palette conversion. */
/* Using Sozobon C 2.0x (short ints) you can compile this with: */
/* cc -e -O -o img.prg img.c xaesfast.a xvdifast.a */
#include <stdio.h>
#include <string.h>
#include <osbind.h>
#include <macros.h>
#ifdef __GNUC__
#define lalloc malloc
#include <memory.h>
#include <aesbind.h>
#include <vdibind.h>
#endif
#ifdef __SOZOBONX__
#include <malloc.h>
#include <xgemfast.h>
#endif
#ifndef FALSE
#define FALSE 0
#define TRUE !FALSE
#endif
/* ------------------------------------------- */
/* error codes */
#define ERR_HEADER 1
#define ERR_ALLOC 2
#define ERR_FILE 3
#define ERR_DEPACK 4
#define ERR_COLOR 5
/* how many bytes one scanline can be */
#define LINEBUF 2048
char buf[LINEBUF];
/* some vdi arrays and global variables (work-area) etc. */
short vdi_handle, work_in[11], work_out[57],
screen_planes, screen_colors, screen_w, screen_h,
normal_palette[256*3], wg_x, wg_y, wg_w, wg_h;
/* VDI <-> Device palette order conversion matrixes:
*/
/* Four-plane vdi-device */
short vdi2dev4[] = {0,15,1,2,4,6,3,5,7,8,9,10,12,14,11,13};
/* Two-plane vdi-device */
short vdi2dev2[] = {0,3,1,2};
/* ------------------------------------------- */
#define XIMG 0x58494D47
typedef struct IMG_HEADER
{ /* Header of GEM Image Files */
short version; /* Img file format version (1) */
short length; /* Header length in words (8) */
short planes; /* Number of bit-planes (1) */
short pat_len; /* length of Patterns (2) */
short pix_w; /* Pixel width in 1/1000 mmm (372) */
short pix_h; /* Pixel height in 1/1000 mmm (372) */
short img_w; /* Pixels per line (=(x+7)/8 Bytes) */
short img_h; /* Total number of lines */
long magic; /* Contains "XIMG" if standard color */
short paltype; /* palette type (0 = RGB (short each)) */
short *palette; /* palette etc. */
char *addr; /* Address for the depacked bit-planes */
} IMG_header;
/* ------------------------------------------- */
/* IMG_RSC (for phase announcement) definition */
#define DIALOG 0 /* form/dialog */
#define NOTICE 1 /* BOXTEXT in tree DIALOG_TREE */
static char notice[64] = "";
static TEDINFO rs_tdi[] = {{notice, "", "", 3, 6, 0, 0x1180, 0x0, -1, 20, 1}};
static OBJECT rs_ob[] =
{{-1, 1, 1, G_BOX, NONE, OUTLINED|SHADOWED, {0xFE113CL}, 2, 1, 23, 3},
{0, -1, -1, G_BOXTEXT, LASTOB, OUTLINED, {(long)&rs_tdi[0]}, 2, 1, 19, 1}};
/* number of objects to fix */
#define NUM_OBS 2
/* ------------------------------------------- */
/* Function prototypes. */
char *pathcut (char *path);
void fix_rsc();
void open_work();
void close_work();
void show_notice(int flag);
void show_error(int error);
char *file_name(char *path);
int depack_img(char *name, IMG_header *info);
void show_img(IMG_header *info);
void set_colors(short *palette, int colors);
int transform_img(MFDB *image, short *palette);
int dither(unsigned short **addr, long size, unsigned short width, unsigned short planes, short *palette);
int interleave(int factor, short **addr, long size, int planes);
int convert(MFDB *image, long size);
/* ------------------------------------------- */
int main(int argc, char *argv[])
{
IMG_header img;
static char options[96], filename[33] = "\0";
int error = 1, i = 1, button = FALSE, type;
char *path;
img.addr = NULL;
path = buf;
appl_init();
open_work();
fix_rsc();
while(i < argc || (argc < 2 && (strcpy(path, "*.IMG"),
fsel_exinput(path, filename, &button, "(X)IMG-Viewer v1.3")) && button))
{
/* hide mouse */
graf_mouse(M_OFF, 0);
if(button)
strcat(pathcut(path), filename);
else
path = argv[i];
type = strlen(path) - 4;
if(type >= 0 && (strcmp(&path[type], ".img") == 0 ||
strcmp(&path[type], ".IMG") == 0))
{
sprintf(notice, " Loading %s... ", file_name(path));
show_notice(TRUE);
error = depack_img(path, &img);
show_notice(FALSE);
if(error)
show_error(error);
else
{
/* exit at right button, next pic at left button */
show_img(&img);
/* not through fileselector */
if(!button)
{
sprintf(options, "[1][%s |(%d/%d)|Size: %d x %d |Bitplanes: %d |][ Prev |Quit|Next]",
file_name(path), i, argc - 1, img.img_w, img.img_h, img.planes);
switch(form_alert(2, options))
{
case 1:
i = max(1, i - 1);
break;
case 2:
i = argc;
break;
case 3:
i = min(argc - 1, i + 1);
break;
}
}
}
/* redraw screen below menu */
form_dial(FMD_FINISH, wg_x, wg_y, wg_w, wg_h, wg_x, wg_y, wg_w, wg_h);
}
/* enable mouse */
graf_mouse(M_ON, 0);
}
free(img.palette);
free(img.addr);
/* restore screen and close virtual... */
close_work();
appl_exit();
return(error);
}
/* cut a filename or -mask away from the filepath */
char *pathcut (char *path)
{
int i = 0;
while(path[i ++] != '\0'); /* search end of string */
while(path[-- i] != '\\' && i >= 0); /* search path separator */
path[++ i] = '\0'; /* cut path from name / mask */
return(path);
}
/* fix resource co-ordinates etc. */
void fix_rsc()
{
int i ;
for(i = 0; i < NUM_OBS; rsrc_obfix(rs_ob, i++));
}
/* open screen, set some vars, hide mouse and disable other screen update */
void open_work()
{
short i, idx;
/* open virtual screen workstation (screen) */
for(i = 0; i < 10; work_in[i ++] = 1);
work_in[10] = 2;
vdi_handle = graf_handle(&i, &i, &i, &i);
v_opnvwk(work_in, &vdi_handle, work_out);
screen_colors = work_out[13];
screen_w = work_out[0];
screen_h = work_out[1];
/* get the number of bitplanes on screen */
vq_extnd(vdi_handle, 1, work_out);
screen_planes = work_out[4];
/* a resolution with a palette */
if(screen_planes > 0 && screen_planes < 9)
/* get current color palette */
for(i = 0; i < screen_colors; i ++)
{
/* device->vdi->device palette order */
switch(screen_planes)
{
case 2:
idx = vdi2dev2[i];
break;
case 4:
idx = vdi2dev4[i];
break;
default:
idx = i;
}
vq_color(vdi_handle, i, 0, normal_palette + idx * 3);
}
/* Desktop work area. */
wind_get (0, WF_WORKXYWH, &wg_x, &wg_y, &wg_w, &wg_h);
/* suspend other screen activity */
wind_update(BEG_UPDATE);
form_dial(FMD_START, wg_x, wg_y, wg_w, wg_h, wg_x, wg_y, wg_w, wg_h);
}
/* enable updates, redraw screen, show mouse and close screen */
void close_work()
{
/* enable other screen activities */
wind_update(END_UPDATE);
v_clsvwk(vdi_handle);
}
/* show and remove a notice dialog */
void show_notice(int flag)
{
short extent[8];
static short x, y, w, h;
if(flag)
{
vqt_extent (vdi_handle, notice, extent);
rs_ob[DIALOG].ob_width = rs_ob[NOTICE].ob_x * 2 + extent[2];
rs_ob[NOTICE].ob_width = extent[2];
form_center(&rs_ob[DIALOG], &x, &y, &w, &h);
form_dial(FMD_START, x, y, w, h, x, y, w, h);
objc_draw(&rs_ob[DIALOG], 0, 7, x, y, w, h);
}
else
{
form_dial(FMD_FINISH, x, y, w, h, x, y, w, h);
}
}
/* show error alert */
void show_error(int error)
{
char message[64];
strcpy(message, "[1][");
switch(error)
{
case ERR_FILE:
strcat(message, "File error.");
break;
case ERR_HEADER:
strcat(message, "Invalid IMG-header.");
break;
case ERR_ALLOC:
strcat(message, "Not enough memory.");
break;
case ERR_DEPACK:
strcat(message, "Depacking error.");
break;
case ERR_COLOR:
strcat(message, "Strange palette.");
break;
}
strcat(message, " ][ OK ]");
form_alert(1, message);
}
/* get whole path, return the address of the plain name */
char *file_name(char *path)
{
char *name;
name = path + strlen(path);
while(*name != '\\' && *name != '/' && name >= path)
name --;
return(++ name);
}
/* Loads & depacks IMG (0 if succeded, else error). */
/* Bitplanes are one after another in address IMG_HEADER.addr. */
int depack_img(char *name, IMG_header *pic)
{
int a, b, line, plane, width, word_aligned, opcode, patt_len, pal_size,
byte_repeat, patt_repeat, scan_repeat, error = FALSE;
char pattern[16], *address, *to, *endline;
long size;
FILE *fp;
if((fp = fopen(name, "rb")) == NULL)
return(ERR_FILE);
/* read header info (bw & ximg) into image structure */
fread((char *)&(pic->version), 2, 8 + 3, fp);
/* only 2-256 color imgs */
if(pic->planes < 1 || pic->planes > 8)
{
error = ERR_COLOR;
goto end_depack;
}
/* if XIMG, read info */
if(pic->magic == XIMG && pic->paltype == 0)
{
pal_size = (1 << pic->planes) * 3 * 2;
if((pic->palette = (short *)malloc(pal_size)))
{
fread((char *)pic->palette, 1, pal_size, fp);
}
}
else
{
pic->palette = NULL;
}
/* width in bytes word aliged */
word_aligned = (pic->img_w + 15) >> 4;
word_aligned <<= 1;
/* width byte aligned */
width = (pic->img_w + 7) >> 3;
/* allocate memory for the picture */
free(pic->addr);
size = (long) word_aligned * pic->img_h * pic->planes;
/* check for header validity & malloc long... */
if (pic->length > 7 && pic->planes < 33 && pic->img_w > 0 && pic->img_h > 0)
pic->addr = (char *) lalloc(size);
else
{
error = ERR_HEADER;
goto end_depack;
}
/* if allocation succeded, proceed with depacking */
if(pic->addr == NULL)
{
error = ERR_ALLOC;
goto end_depack;
}
else
{
patt_len = pic->pat_len;
endline = buf + width;
/* jump over the header and possible (XIMG) info */
fseek(fp, (long) pic->length * 2, SEEK_SET);
/* depack whole img */
for(line = 0; line < pic->img_h; line += scan_repeat)
{
scan_repeat = 1;
/* depack one scan line */
for(plane = 0; plane < pic->planes; plane ++)
{
to = buf;
/* depack one line in one bitplane */
do
{
opcode = fgetc(fp);
switch(opcode)
{
/* pattern or scan repeat */
case 0:
patt_repeat = fgetc(fp);
/* repeat a pattern */
if(patt_repeat)
{
/* read pattern */
for(b = 0; b < patt_len; b ++)
pattern[b] = fgetc(fp);
/* copy pattern */
for(a = 0; a < patt_repeat; a ++)
{
/* in case it's odd amount... */
for(b = 0; b < patt_len; b ++)
*(to ++) = pattern[b];
}
}
/* repeat a line */
else
{
if(fgetc(fp) == 0xFF)
scan_repeat = fgetc(fp);
else
{
error = ERR_DEPACK;
goto end_depack;
}
}
break;
/* repeat 'as is' */
case 0x80:
byte_repeat = fgetc(fp);
for(; byte_repeat > 0; byte_repeat --)
*(to ++) = fgetc(fp);
break;
/* repeat black or white */
default:
byte_repeat = opcode & 0x7F;
if(opcode & 0x80)
opcode = 0xFF;
else
opcode = 0x00;
for(; byte_repeat > 0; byte_repeat --)
*(to ++) = opcode;
}
}
while(to < endline);
if(to == endline)
{
/* ensure that lines aren't repeated past the end of the img */
if(line + scan_repeat > pic->img_h)
scan_repeat = pic->img_h - line;
/* calculate address of a current line in a current bitplane */
address = pic->addr +
(long) line * word_aligned +
(long) plane * word_aligned * pic->img_h;
/* copy line to image buffer */
for(a = 0; a < scan_repeat; a ++)
{
memcpy(address, buf, width);
address += word_aligned;
}
}
else
{
error = ERR_DEPACK;
goto end_depack;
}
}
}
}
end_depack:
fclose(fp);
return(error);
}
/* show img on screen */
void show_img(IMG_header *pic)
{
short buttons = 0, key, x1 = 0, y1 = 0, x2 = 0, y2 = 0,
mx, my, xx, yy, cen_x, cen_y, redraw = TRUE, pxyarray[8], colors;
MFDB image, screen;
/* Screen and Image VDI Memory Form Definitions. */
screen.fd_addr = 0;
image.fd_addr = pic->addr; /* address */
image.fd_w = pic->img_w; /* width */
image.fd_wdwidth = (pic->img_w + 15) >> 4; /* (words) */
image.fd_h = pic->img_h; /* height */
image.fd_stand = 0; /* raster format = device */
image.fd_nplanes = pic->planes; /* bitplanes */
/* pic size on screen */
xx = min(wg_w, pic->img_w);
yy = min(wg_h, pic->img_h);
/* for centering pic on screen */
cen_x = ((wg_w - xx) >> 1) + wg_x;
cen_y = ((wg_h - yy) >> 1) + wg_y;
/* convert image to the current screen format if necessary */
if(!(transform_img(&image, pic->palette)))
{
return(FALSE);
}
/* if a color image with a RGB palette and color resolution */
colors = (pic->palette != NULL && screen_planes > 1 && screen_planes < 9);
if(colors)
set_colors(pic->palette, min(screen_colors, pic->planes));
do
{
/* get mouse position */
graf_mkstate(&mx, &my, &buttons, &key);
/* calculate new image place */
x1 = (long) mx * (image.fd_w - xx) / screen_w;
y1 = (long) my * (image.fd_h - yy) / screen_h;
/* fit co-ordinates onto screen */
x1 = min(x1, pic->img_w - xx);
y1 = min(y1, pic->img_h - yy);
x1 = max(0, x1);
y1 = max(0, y1);
/* draw image if necessary */
if (redraw || x1 != x2 || y1 != y2)
{
/* put values into the co-ordinate array */
pxyarray[0] = x1;
pxyarray[1] = y1;
pxyarray[2] = x1 + xx - 1;
pxyarray[3] = y1 + yy - 1;
pxyarray[4] = cen_x;
pxyarray[5] = cen_y;
pxyarray[6] = cen_x + xx - 1;
pxyarray[7] = cen_y + yy - 1;
/* throw onto screen */
vro_cpyfm(vdi_handle, S_ONLY, pxyarray, &image, &screen);
x2 = x1; y2 = y1;
redraw = FALSE;
}
/* exit with right button */
}
while(!buttons);
if(colors)
/* restore normal palette (already converted) */
set_colors(normal_palette, screen_planes);
/* if image was converted to device format, free allcated memory */
if(image.fd_addr != pic->addr)
free(image.fd_addr);
/* assure mouse button(s) off */
while(buttons)
graf_mkstate(&mx, &my, &buttons, &key);
}
void set_colors(short *palette, int colors)
{
int i, idx;
/* set color palette */
colors = 1 << colors;
for(i = 0; i < colors; i++)
{
switch(screen_planes)
{
case 2:
idx = vdi2dev2[i];
break;
case 4:
idx = vdi2dev4[i];
break;
default:
idx = i;
}
vs_color(vdi_handle, i, palette + idx * 3);
}
}
/* return FALSE if transformation was unsuccesful */
int transform_img(MFDB *image, short *palette)
{
int success;
long size;
size = (long)(image->fd_wdwidth * image->fd_h);
if(screen_planes == 1)
{
if(image->fd_nplanes > 1)
{
sprintf(notice, " Dithering %d bitplanes... ", image->fd_nplanes);
show_notice(TRUE);
success = dither((unsigned short **)&(image->fd_addr), size, (unsigned short)image->fd_wdwidth,
(unsigned short)image->fd_nplanes, palette);
show_notice(FALSE);
if(!success)
{
show_error(ERR_ALLOC);
return(FALSE);
}
image->fd_nplanes = 1;
}
return(TRUE);
}
else
{
sprintf(notice, " Converting %d bitplanes... ", image->fd_nplanes);
show_notice(TRUE);
/* Use vr_trfm(), which needs quite a lot memory. */
success = convert(image, size);
show_notice(FALSE);
if(success)
{
return(TRUE);
}
else
show_error(ERR_ALLOC);
}
return(FALSE);
}
/* dither bitplanes into an bw one */
int dither(unsigned short **addr, long size, unsigned short width,
unsigned short planes, short *palette)
{
long offset;
register unsigned short *plane, i, bit, color, result, *mat;
unsigned short first_plane[32], *last,
col_max = 0, col_min = 0,
count = 0, row = 0, modulo = 0,
*idx, *end, *new_addr, *new,
intensity[256];
/* ordered dithering matrix */
static unsigned short matrix[16][16] =
{{0x00, 0xc0, 0x30, 0xf0, 0x0c, 0xcc, 0x3c, 0xfc,
0x03, 0xc3, 0x33, 0xf3, 0x0f, 0xcf, 0x3f, 0xff},
{0x80, 0x40, 0xb0, 0x70, 0x8c, 0x4c, 0xbc, 0x7c,
0x83, 0x43, 0xb3, 0x73, 0x8f, 0x4f, 0xbf, 0x7f},
{0x20, 0xe0, 0x10, 0xd0, 0x2c, 0xec, 0x1c, 0xdc,
0x23, 0xe3, 0x13, 0xd3, 0x2f, 0xef, 0x1f, 0xdf},
{0xa0, 0x60, 0x90, 0x50, 0xac, 0x6c, 0x9c, 0x5c,
0xa3, 0x63, 0x93, 0x53, 0xaf, 0x6f, 0x9f, 0x5f},
{0x08, 0xc8, 0x38, 0xf8, 0x04, 0xc4, 0x34, 0xf4,
0x0b, 0xcb, 0x3b, 0xfb, 0x07, 0xc7, 0x37, 0xf7},
{0x88, 0x48, 0xb8, 0x78, 0x84, 0x44, 0xb4, 0x74,
0x8b, 0x4b, 0xbb, 0x7b, 0x87, 0x47, 0xb7, 0x77},
{0x28, 0xe8, 0x18, 0xd8, 0x24, 0xe4, 0x14, 0xd4,
0x2b, 0xeb, 0x1b, 0xdb, 0x27, 0xe7, 0x17, 0xd7},
{0xa8, 0x68, 0x98, 0x58, 0xa4, 0x64, 0x94, 0x54,
0xab, 0x6b, 0x9b, 0x5b, 0xa7, 0x67, 0x97, 0x57},
{0x02, 0xc2, 0x32, 0xf2, 0x0e, 0xce, 0x3e, 0xfe,
0x01, 0xc1, 0x31, 0xf1, 0x0d, 0xcd, 0x3d, 0xfd},
{0x82, 0x42, 0xb2, 0x72, 0x8e, 0x4e, 0xbe, 0x7e,
0x81, 0x41, 0xb1, 0x71, 0x8d, 0x4d, 0xbd, 0x7d},
{0x22, 0xe2, 0x12, 0xd2, 0x2e, 0xee, 0x1e, 0xde,
0x21, 0xe1, 0x11, 0xd1, 0x2d, 0xed, 0x1d, 0xdd},
{0xa2, 0x62, 0x92, 0x52, 0xae, 0x6e, 0x9e, 0x5e,
0xa1, 0x61, 0x91, 0x51, 0xad, 0x6d, 0x9d, 0x5d},
{0x0a, 0xca, 0x3a, 0xfa, 0x06, 0xc6, 0x36, 0xf6,
0x09, 0xc9, 0x39, 0xf9, 0x05, 0xc5, 0x35, 0xf5},
{0x8a, 0x4a, 0xba, 0x7a, 0x86, 0x46, 0xb6, 0x76,
0x89, 0x49, 0xb9, 0x79, 0x85, 0x45, 0xb5, 0x75},
{0x2a, 0xea, 0x1a, 0xda, 0x26, 0xe6, 0x16, 0xd6,
0x29, 0xe9, 0x19, 0xd9, 0x25, 0xe5, 0x15, 0xd5},
{0xaa, 0x6a, 0x9a, 0x5a, 0xa6, 0x66, 0x96, 0x56,
0xa9, 0x69, 0x99, 0x59, 0xa5, 0x65, 0x95, 0x55}};
/* allocate space for the new (dithered) bitmap */
if((new_addr = (unsigned short *) lalloc(size * sizeof(**addr))) == NULL)
return(FALSE);
last = first_plane + planes - 1;
planes = (1 << planes);
/* scan palette */
if(planes <= 256)
{
for(i = 0; i < planes; i ++)
{
intensity[i] = 0;
/* add register values together to get the grey level */
for(bit = 0; bit < 3; bit ++)
{
intensity[i] += *(palette + 3 * i + bit);
}
col_min = min(col_min, intensity[i]);
col_max = max(col_max, intensity[i]);
}
/* scale color values to 0 - 255 range */
for(i = 0; i < planes; i ++)
{
intensity[i] = (long)(intensity[i] - col_min) * 255 / (col_max - col_min);
}
}
/* destination pointer */
new = new_addr;
/* NOTICE: *addr + size = *addr + sizeof(**addr) * size!!! */
end = *addr + size;
/* remake first bitplane */
planes >>= 1;
for(idx = *addr; idx < end; idx ++)
{
/* go through all bitplanes */
plane = first_plane;
offset = 0;
for(i = planes; i > 0; i >>= 1)
{
/* get one word from a bitplane */
*(plane ++) = (short) *(idx + offset);
offset += size;
}
/* get row's modulo into dither matrix */
if(++ count == width)
{
count = 0;
row ++;
modulo = row % 16;
}
result = 0;
mat = matrix[modulo];
/* go through one word on all bitplanes */
for(bit = 0x8000; bit > 0; bit >>= 1)
{
color = 0;
plane = last;
/* planar->chunky */
for(i = planes; i > 0; i >>= 1)
if((*(plane --) & bit))
color |= i;
/* set bit in resulting bitplane if its' intensity demands it */
if(intensity[color] < *(mat ++))
result |= bit;
}
*(new ++) = result;
}
*addr = new_addr;
return(TRUE);
}
/* convert image using the standard vr_trfm() */
int convert(MFDB *image, long size)
{
int i, plane, planes, line_size, width;
char *line_addr, *buf_addr, *new_addr;
char *image_addr, *screen_addr;
MFDB screen, tmp;
/* convert size from words to bytes */
size <<= 1;
/* memory for the device raster */
if((new_addr = (char *) lalloc(size * screen_planes)) == NULL)
return(FALSE);
/* initialize MFDBs */
tmp = *image;
tmp.fd_h = 1;
tmp.fd_nplanes = screen_planes;
tmp.fd_addr = buf;
tmp.fd_stand = 1; /* standard format */
screen = tmp;
screen_addr = new_addr;
screen.fd_stand = 0; /* device format */
image_addr = (char *)image->fd_addr;
/* initialize some variables and zero temp. line buffer */
planes = min(image->fd_nplanes, screen_planes);
width = (tmp.fd_wdwidth << 1);
line_size = screen_planes * width;
for(i = 0; i < line_size; i ++)
buf[i] = 0;
/* convert image */
for(i = 0; i < image->fd_h; i ++)
{
line_addr = image_addr + width * i;
buf_addr = buf;
if(planes > 1)
{
/* cut / pad color planes into temp buf */
for(plane = 0; plane < planes; plane ++)
{
memcpy(buf_addr, line_addr, width);
line_addr += size;
buf_addr += width;
}
}
else
{
/* fill temp line bitplanes with a b&w line */
for(plane = 0; plane < screen_planes; plane ++)
{
memcpy(buf_addr, line_addr, width);
buf_addr += width;
}
}
/* convert image line in temp into current device raster format */
screen.fd_addr = screen_addr;
vr_trnfm(vdi_handle, &tmp, &screen);
screen_addr += line_size;
}
/* change image description */
image->fd_stand = 0; /* device format */
image->fd_addr = new_addr;
image->fd_nplanes = screen_planes;
return(TRUE);
}