*** empty log message ***
This commit is contained in:
jwalz
706
win/share/gifread.c
Normal file
706
win/share/gifread.c
Normal file
@@ -0,0 +1,706 @@
|
||||
/* GIF reading routines based on those in pbmplus:ppm/giftoppm.c, bearing
|
||||
* following copyright notice:
|
||||
*/
|
||||
|
||||
/* +-------------------------------------------------------------------+ */
|
||||
/* | Copyright 1990, David Koblas. | */
|
||||
/* | Permission to use, copy, modify, and distribute this software | */
|
||||
/* | and its documentation for any purpose and without fee is hereby | */
|
||||
/* | granted, provided that the above copyright notice appear in all | */
|
||||
/* | copies and that both that copyright notice and this permission | */
|
||||
/* | notice appear in supporting documentation. This software is | */
|
||||
/* | provided "as is" without express or implied warranty. | */
|
||||
/* +-------------------------------------------------------------------+ */
|
||||
|
||||
|
||||
#include "config.h"
|
||||
#include "tile.h"
|
||||
|
||||
#ifndef MONITOR_HEAP
|
||||
extern long *FDECL(alloc, (unsigned int));
|
||||
#endif
|
||||
|
||||
#define PPM_ASSIGN(p,red,grn,blu) do { (p).r = (red); (p).g = (grn); (p).b = (blu); } while ( 0 )
|
||||
|
||||
#define MAX_LWZ_BITS 12
|
||||
|
||||
#define INTERLACE 0x40
|
||||
#define LOCALCOLORMAP 0x80
|
||||
#define BitSet(byte, bit) (((byte) & (bit)) == (bit))
|
||||
|
||||
#define ReadOK(file,buffer,len) (fread((genericptr_t)buffer, (int)len, 1, file) != 0)
|
||||
|
||||
#define LM_to_uint(a,b) (((b)<<8)|(a))
|
||||
|
||||
struct gifscreen {
|
||||
int Width;
|
||||
int Height;
|
||||
int Colors;
|
||||
int ColorResolution;
|
||||
int Background;
|
||||
int AspectRatio;
|
||||
int Interlace;
|
||||
} GifScreen;
|
||||
|
||||
struct {
|
||||
int transparent;
|
||||
int delayTime;
|
||||
int inputFlag;
|
||||
int disposal;
|
||||
} Gif89 = { -1, -1, -1, 0 };
|
||||
|
||||
int ZeroDataBlock = FALSE;
|
||||
|
||||
static FILE *gif_file;
|
||||
static int tiles_across, tiles_down, curr_tiles_across, curr_tiles_down;
|
||||
static pixel **image;
|
||||
static unsigned char input_code_size;
|
||||
|
||||
static int FDECL(GetDataBlock, (FILE *fd, unsigned char *buf));
|
||||
static void FDECL(DoExtension, (FILE *fd, int label));
|
||||
static boolean FDECL(ReadColorMap, (FILE *fd, int number));
|
||||
static void FDECL(read_header, (FILE *fd));
|
||||
static int FDECL(GetCode, (FILE *fd, int code_size, int flag));
|
||||
static int FDECL(LWZReadByte, (FILE *fd, int flag, int input_code_size));
|
||||
static void FDECL(ReadInterleavedImage, (FILE *fd, int len, int height));
|
||||
static void FDECL(ReadTileStrip, (FILE *fd, int len));
|
||||
|
||||
/* These should be in gif.h, but there isn't one. */
|
||||
boolean FDECL(fopen_gif_file, (const char *, const char *));
|
||||
boolean FDECL(read_gif_tile, (pixel(*)[]));
|
||||
int NDECL(fclose_gif_file);
|
||||
|
||||
static int
|
||||
GetDataBlock(fd, buf)
|
||||
FILE *fd;
|
||||
unsigned char *buf;
|
||||
{
|
||||
unsigned char count;
|
||||
|
||||
if (!ReadOK(fd,&count,1)) {
|
||||
Fprintf(stderr, "error in getting DataBlock size\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
ZeroDataBlock = (count == 0);
|
||||
|
||||
if ((count != 0) && (!ReadOK(fd, buf, count))) {
|
||||
Fprintf(stderr, "error in reading DataBlock\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static void
|
||||
DoExtension(fd, label)
|
||||
FILE *fd;
|
||||
int label;
|
||||
{
|
||||
static char buf[256];
|
||||
char *str;
|
||||
|
||||
switch (label) {
|
||||
case 0x01: /* Plain Text Extension */
|
||||
str = "Plain Text Extension";
|
||||
#ifdef notdef
|
||||
if (GetDataBlock(fd, (unsigned char*) buf) == 0)
|
||||
;
|
||||
|
||||
lpos = LM_to_uint(buf[0], buf[1]);
|
||||
tpos = LM_to_uint(buf[2], buf[3]);
|
||||
width = LM_to_uint(buf[4], buf[5]);
|
||||
height = LM_to_uint(buf[6], buf[7]);
|
||||
cellw = buf[8];
|
||||
cellh = buf[9];
|
||||
foreground = buf[10];
|
||||
background = buf[11];
|
||||
|
||||
while (GetDataBlock(fd, (unsigned char*) buf) != 0) {
|
||||
PPM_ASSIGN(image[ypos][xpos],
|
||||
cmap[CM_RED][v],
|
||||
cmap[CM_GREEN][v],
|
||||
cmap[CM_BLUE][v]);
|
||||
++index;
|
||||
}
|
||||
|
||||
return;
|
||||
#else
|
||||
break;
|
||||
#endif
|
||||
case 0xff: /* Application Extension */
|
||||
str = "Application Extension";
|
||||
break;
|
||||
case 0xfe: /* Comment Extension */
|
||||
str = "Comment Extension";
|
||||
while (GetDataBlock(fd, (unsigned char*) buf) != 0) {
|
||||
Fprintf(stderr, "gif comment: %s\n", buf );
|
||||
}
|
||||
return;
|
||||
case 0xf9: /* Graphic Control Extension */
|
||||
str = "Graphic Control Extension";
|
||||
(void) GetDataBlock(fd, (unsigned char*) buf);
|
||||
Gif89.disposal = (buf[0] >> 2) & 0x7;
|
||||
Gif89.inputFlag = (buf[0] >> 1) & 0x1;
|
||||
Gif89.delayTime = LM_to_uint(buf[1],buf[2]);
|
||||
if ((buf[0] & 0x1) != 0)
|
||||
Gif89.transparent = buf[3];
|
||||
|
||||
while (GetDataBlock(fd, (unsigned char*) buf) != 0)
|
||||
;
|
||||
return;
|
||||
default:
|
||||
str = buf;
|
||||
Sprintf(buf, "UNKNOWN (0x%02x)", label);
|
||||
break;
|
||||
}
|
||||
|
||||
Fprintf(stderr, "got a '%s' extension\n", str);
|
||||
|
||||
while (GetDataBlock(fd, (unsigned char*) buf) != 0)
|
||||
;
|
||||
}
|
||||
|
||||
static
|
||||
boolean
|
||||
ReadColorMap(fd,number)
|
||||
FILE *fd;
|
||||
int number;
|
||||
{
|
||||
int i;
|
||||
unsigned char rgb[3];
|
||||
|
||||
for (i = 0; i < number; ++i) {
|
||||
if (!ReadOK(fd, rgb, sizeof(rgb))) {
|
||||
return(FALSE);
|
||||
}
|
||||
|
||||
ColorMap[CM_RED][i] = rgb[0] ;
|
||||
ColorMap[CM_GREEN][i] = rgb[1] ;
|
||||
ColorMap[CM_BLUE][i] = rgb[2] ;
|
||||
}
|
||||
colorsinmap = number;
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/*
|
||||
* Read gif header, including colormaps. We expect only one image per
|
||||
* file, so if that image has a local colormap, overwrite the global one.
|
||||
*/
|
||||
static void
|
||||
read_header(fd)
|
||||
FILE *fd;
|
||||
{
|
||||
unsigned char buf[16];
|
||||
unsigned char c;
|
||||
char version[4];
|
||||
|
||||
if (!ReadOK(fd,buf,6)) {
|
||||
Fprintf(stderr, "error reading magic number\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (strncmp((genericptr_t)buf,"GIF",3) != 0) {
|
||||
Fprintf(stderr, "not a GIF file\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
(void) strncpy(version, (char *)buf + 3, 3);
|
||||
version[3] = '\0';
|
||||
|
||||
if ((strcmp(version, "87a") != 0) && (strcmp(version, "89a") != 0)) {
|
||||
Fprintf(stderr, "bad version number, not '87a' or '89a'\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (!ReadOK(fd,buf,7)) {
|
||||
Fprintf(stderr, "failed to read screen descriptor\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
GifScreen.Width = LM_to_uint(buf[0],buf[1]);
|
||||
GifScreen.Height = LM_to_uint(buf[2],buf[3]);
|
||||
GifScreen.Colors = 2<<(buf[4]&0x07);
|
||||
GifScreen.ColorResolution = (((buf[4]&0x70)>>3)+1);
|
||||
GifScreen.Background = buf[5];
|
||||
GifScreen.AspectRatio = buf[6];
|
||||
|
||||
if (BitSet(buf[4], LOCALCOLORMAP)) { /* Global Colormap */
|
||||
if (!ReadColorMap(fd, GifScreen.Colors)) {
|
||||
Fprintf(stderr, "error reading global colormap\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
|
||||
if (GifScreen.AspectRatio != 0 && GifScreen.AspectRatio != 49) {
|
||||
Fprintf(stderr, "warning - non-square pixels\n");
|
||||
}
|
||||
|
||||
for (;;) {
|
||||
if (!ReadOK(fd,&c,1)) {
|
||||
Fprintf(stderr, "EOF / read error on image data\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (c == ';') { /* GIF terminator */
|
||||
return;
|
||||
}
|
||||
|
||||
if (c == '!') { /* Extension */
|
||||
if (!ReadOK(fd,&c,1)) {
|
||||
Fprintf(stderr,
|
||||
"EOF / read error on extension function code\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
DoExtension(fd, (int)c);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (c != ',') { /* Not a valid start character */
|
||||
Fprintf(stderr,
|
||||
"bogus character 0x%02x, ignoring\n", (int) c);
|
||||
continue;
|
||||
}
|
||||
|
||||
if (!ReadOK(fd,buf,9)) {
|
||||
Fprintf(stderr, "couldn't read left/top/width/height\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (BitSet(buf[8], LOCALCOLORMAP)) {
|
||||
/* replace global color map with local */
|
||||
GifScreen.Colors = 1<<((buf[8]&0x07)+1);
|
||||
if (!ReadColorMap(fd, GifScreen.Colors)) {
|
||||
Fprintf(stderr, "error reading local colormap\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
}
|
||||
if (GifScreen.Width != LM_to_uint(buf[4],buf[5])) {
|
||||
Fprintf(stderr, "warning: widths don't match\n");
|
||||
GifScreen.Width = LM_to_uint(buf[4],buf[5]);
|
||||
}
|
||||
if (GifScreen.Height != LM_to_uint(buf[6],buf[7])) {
|
||||
Fprintf(stderr, "warning: heights don't match\n");
|
||||
GifScreen.Height = LM_to_uint(buf[6],buf[7]);
|
||||
}
|
||||
GifScreen.Interlace = BitSet(buf[8], INTERLACE);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
static int
|
||||
GetCode(fd, code_size, flag)
|
||||
FILE *fd;
|
||||
int code_size;
|
||||
int flag;
|
||||
{
|
||||
static unsigned char buf[280];
|
||||
static int curbit, lastbit, done, last_byte;
|
||||
int i, j, ret;
|
||||
unsigned char count;
|
||||
|
||||
if (flag) {
|
||||
curbit = 0;
|
||||
lastbit = 0;
|
||||
done = FALSE;
|
||||
return 0;
|
||||
}
|
||||
|
||||
if ((curbit+code_size) >= lastbit) {
|
||||
if (done) {
|
||||
if (curbit >= lastbit)
|
||||
Fprintf(stderr, "ran off the end of my bits\n");
|
||||
return -1;
|
||||
}
|
||||
buf[0] = buf[last_byte-2];
|
||||
buf[1] = buf[last_byte-1];
|
||||
|
||||
if ((count = GetDataBlock(fd, &buf[2])) == 0)
|
||||
done = TRUE;
|
||||
|
||||
last_byte = 2 + count;
|
||||
curbit = (curbit - lastbit) + 16;
|
||||
lastbit = (2+count)*8 ;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
for (i = curbit, j = 0; j < code_size; ++i, ++j)
|
||||
ret |= ((buf[ i / 8 ] & (1 << (i % 8))) != 0) << j;
|
||||
|
||||
curbit += code_size;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int
|
||||
LWZReadByte(fd, flag, input_code_size)
|
||||
FILE *fd;
|
||||
int flag;
|
||||
int input_code_size;
|
||||
{
|
||||
static int fresh = FALSE;
|
||||
int code, incode;
|
||||
static int code_size, set_code_size;
|
||||
static int max_code, max_code_size;
|
||||
static int firstcode, oldcode;
|
||||
static int clear_code, end_code;
|
||||
static int table[2][(1<< MAX_LWZ_BITS)];
|
||||
static int stack[(1<<(MAX_LWZ_BITS))*2], *sp;
|
||||
register int i;
|
||||
|
||||
if (flag) {
|
||||
set_code_size = input_code_size;
|
||||
code_size = set_code_size+1;
|
||||
clear_code = 1 << set_code_size ;
|
||||
end_code = clear_code + 1;
|
||||
max_code_size = 2*clear_code;
|
||||
max_code = clear_code+2;
|
||||
|
||||
(void) GetCode(fd, 0, TRUE);
|
||||
|
||||
fresh = TRUE;
|
||||
|
||||
for (i = 0; i < clear_code; ++i) {
|
||||
table[0][i] = 0;
|
||||
table[1][i] = i;
|
||||
}
|
||||
for (; i < (1<<MAX_LWZ_BITS); ++i)
|
||||
table[0][i] = table[1][0] = 0;
|
||||
|
||||
sp = stack;
|
||||
|
||||
return 0;
|
||||
} else if (fresh) {
|
||||
fresh = FALSE;
|
||||
do {
|
||||
firstcode = oldcode = GetCode(fd, code_size, FALSE);
|
||||
} while (firstcode == clear_code);
|
||||
return firstcode;
|
||||
}
|
||||
|
||||
if (sp > stack)
|
||||
return *--sp;
|
||||
|
||||
while ((code = GetCode(fd, code_size, FALSE)) >= 0) {
|
||||
if (code == clear_code) {
|
||||
for (i = 0; i < clear_code; ++i) {
|
||||
table[0][i] = 0;
|
||||
table[1][i] = i;
|
||||
}
|
||||
for (; i < (1<<MAX_LWZ_BITS); ++i)
|
||||
table[0][i] = table[1][i] = 0;
|
||||
code_size = set_code_size+1;
|
||||
max_code_size = 2*clear_code;
|
||||
max_code = clear_code+2;
|
||||
sp = stack;
|
||||
firstcode = oldcode = GetCode(fd, code_size, FALSE);
|
||||
return firstcode;
|
||||
} else if (code == end_code) {
|
||||
int count;
|
||||
unsigned char buf[260];
|
||||
|
||||
if (ZeroDataBlock)
|
||||
return -2;
|
||||
|
||||
while ((count = GetDataBlock(fd, buf)) > 0)
|
||||
;
|
||||
|
||||
if (count != 0)
|
||||
Fprintf(stderr,
|
||||
"missing EOD in data stream (common occurrence)\n");
|
||||
return -2;
|
||||
}
|
||||
|
||||
incode = code;
|
||||
|
||||
if (code >= max_code) {
|
||||
*sp++ = firstcode;
|
||||
code = oldcode;
|
||||
}
|
||||
|
||||
while (code >= clear_code) {
|
||||
*sp++ = table[1][code];
|
||||
if (code == table[0][code]) {
|
||||
Fprintf(stderr, "circular table entry BIG ERROR\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
code = table[0][code];
|
||||
}
|
||||
|
||||
*sp++ = firstcode = table[1][code];
|
||||
|
||||
if ((code = max_code) <(1<<MAX_LWZ_BITS)) {
|
||||
table[0][code] = oldcode;
|
||||
table[1][code] = firstcode;
|
||||
++max_code;
|
||||
if ((max_code >= max_code_size) &&
|
||||
(max_code_size < (1<<MAX_LWZ_BITS))) {
|
||||
max_code_size *= 2;
|
||||
++code_size;
|
||||
}
|
||||
}
|
||||
|
||||
oldcode = incode;
|
||||
|
||||
if (sp > stack)
|
||||
return *--sp;
|
||||
}
|
||||
return code;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
ReadInterleavedImage(fd, len, height)
|
||||
FILE *fd;
|
||||
int len, height;
|
||||
{
|
||||
int v;
|
||||
int xpos = 0, ypos = 0, pass = 0;
|
||||
|
||||
while ((v = LWZReadByte(fd,FALSE,(int)input_code_size)) >= 0 ) {
|
||||
PPM_ASSIGN(image[ypos][xpos], ColorMap[CM_RED][v],
|
||||
ColorMap[CM_GREEN][v], ColorMap[CM_BLUE][v]);
|
||||
|
||||
++xpos;
|
||||
if (xpos == len) {
|
||||
xpos = 0;
|
||||
switch (pass) {
|
||||
case 0:
|
||||
case 1:
|
||||
ypos += 8; break;
|
||||
case 2:
|
||||
ypos += 4; break;
|
||||
case 3:
|
||||
ypos += 2; break;
|
||||
}
|
||||
|
||||
if (ypos >= height) {
|
||||
++pass;
|
||||
switch (pass) {
|
||||
case 1:
|
||||
ypos = 4; break;
|
||||
case 2:
|
||||
ypos = 2; break;
|
||||
case 3:
|
||||
ypos = 1; break;
|
||||
default:
|
||||
goto fini;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (ypos >= height)
|
||||
break;
|
||||
}
|
||||
|
||||
fini:
|
||||
if (LWZReadByte(fd,FALSE,(int)input_code_size)>=0)
|
||||
Fprintf(stderr, "too much input data, ignoring extra...\n");
|
||||
}
|
||||
|
||||
static
|
||||
void
|
||||
ReadTileStrip(fd,len)
|
||||
FILE *fd;
|
||||
int len;
|
||||
{
|
||||
int v;
|
||||
int xpos = 0, ypos = 0;
|
||||
|
||||
while ((v = LWZReadByte(fd,FALSE,(int)input_code_size)) >= 0 ) {
|
||||
PPM_ASSIGN(image[ypos][xpos], ColorMap[CM_RED][v],
|
||||
ColorMap[CM_GREEN][v], ColorMap[CM_BLUE][v]);
|
||||
|
||||
++xpos;
|
||||
if (xpos == len) {
|
||||
xpos = 0;
|
||||
++ypos;
|
||||
}
|
||||
if (ypos >= TILE_Y)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
boolean
|
||||
fopen_gif_file(filename, type)
|
||||
const char *filename;
|
||||
const char *type;
|
||||
{
|
||||
int i;
|
||||
|
||||
if (strcmp(type, RDBMODE)) {
|
||||
Fprintf(stderr, "using reading routine for non-reading?\n");
|
||||
return FALSE;
|
||||
}
|
||||
gif_file = fopen(filename, type);
|
||||
if (gif_file == (FILE *)0) {
|
||||
Fprintf(stderr, "cannot open gif file %s\n", filename);
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
read_header(gif_file);
|
||||
if (GifScreen.Width % TILE_X) {
|
||||
Fprintf(stderr, "error: width %d not divisible by %d\n",
|
||||
GifScreen.Width, TILE_X);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
tiles_across = GifScreen.Width / TILE_X;
|
||||
curr_tiles_across = 0;
|
||||
if (GifScreen.Height % TILE_Y) {
|
||||
Fprintf(stderr, "error: height %d not divisible by %d\n",
|
||||
GifScreen.Height, TILE_Y);
|
||||
/* exit(EXIT_FAILURE) */;
|
||||
}
|
||||
tiles_down = GifScreen.Height / TILE_Y;
|
||||
curr_tiles_down = 0;
|
||||
|
||||
if (GifScreen.Interlace) {
|
||||
/* sigh -- hope this doesn't happen on micros */
|
||||
image = (pixel **)alloc(GifScreen.Height * sizeof(pixel *));
|
||||
for (i = 0; i < GifScreen.Height; i++) {
|
||||
image[i] = (pixel *) alloc(GifScreen.Width * sizeof(pixel));
|
||||
}
|
||||
} else {
|
||||
image = (pixel **)alloc(TILE_Y * sizeof(pixel *));
|
||||
for (i = 0; i < TILE_Y; i++) {
|
||||
image[i] = (pixel *) alloc(GifScreen.Width * sizeof(pixel));
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
** Initialize the Compression routines
|
||||
*/
|
||||
if (!ReadOK(gif_file,&input_code_size,1)) {
|
||||
Fprintf(stderr, "EOF / read error on image data\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
if (LWZReadByte(gif_file, TRUE, (int)input_code_size) < 0) {
|
||||
Fprintf(stderr, "error reading image\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
/* read first section */
|
||||
if (GifScreen.Interlace) {
|
||||
ReadInterleavedImage(gif_file,
|
||||
GifScreen.Width,GifScreen.Height);
|
||||
} else {
|
||||
ReadTileStrip(gif_file,GifScreen.Width);
|
||||
}
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
/* Read a tile. Returns FALSE when there are no more tiles */
|
||||
boolean
|
||||
read_gif_tile(pixels)
|
||||
pixel (*pixels)[TILE_X];
|
||||
{
|
||||
int i, j;
|
||||
|
||||
if (curr_tiles_down >= tiles_down) return FALSE;
|
||||
if (curr_tiles_across == tiles_across) {
|
||||
curr_tiles_across = 0;
|
||||
curr_tiles_down++;
|
||||
if (curr_tiles_down >= tiles_down) return FALSE;
|
||||
if (!GifScreen.Interlace)
|
||||
ReadTileStrip(gif_file,GifScreen.Width);
|
||||
}
|
||||
if (GifScreen.Interlace) {
|
||||
for (j = 0; j < TILE_Y; j++) {
|
||||
for (i = 0; i < TILE_X; i++) {
|
||||
pixels[j][i] = image[curr_tiles_down*TILE_Y + j]
|
||||
[curr_tiles_across*TILE_X + i];
|
||||
}
|
||||
}
|
||||
} else {
|
||||
for (j = 0; j < TILE_Y; j++) {
|
||||
for (i = 0; i < TILE_X; i++) {
|
||||
pixels[j][i] = image[j][curr_tiles_across*TILE_X + i];
|
||||
}
|
||||
}
|
||||
}
|
||||
curr_tiles_across++;
|
||||
|
||||
/* check for "filler" tile */
|
||||
for (j = 0; j < TILE_Y; j++) {
|
||||
for (i = 0; i < TILE_X && i < 4; i += 2) {
|
||||
if (pixels[j][i].r != ColorMap[CM_RED][0] ||
|
||||
pixels[j][i].g != ColorMap[CM_GREEN][0] ||
|
||||
pixels[j][i].b != ColorMap[CM_BLUE][0] ||
|
||||
pixels[j][i+1].r != ColorMap[CM_RED][1] ||
|
||||
pixels[j][i+1].g != ColorMap[CM_GREEN][1] ||
|
||||
pixels[j][i+1].b != ColorMap[CM_BLUE][1])
|
||||
return TRUE;
|
||||
}
|
||||
}
|
||||
return FALSE;
|
||||
}
|
||||
|
||||
int
|
||||
fclose_gif_file()
|
||||
{
|
||||
int i;
|
||||
|
||||
if (GifScreen.Interlace) {
|
||||
for (i = 0; i < GifScreen.Height; i++) {
|
||||
free((genericptr_t)image[i]);
|
||||
}
|
||||
free((genericptr_t)image);
|
||||
} else {
|
||||
for (i = 0; i < TILE_Y; i++) {
|
||||
free((genericptr_t)image[i]);
|
||||
}
|
||||
free((genericptr_t)image);
|
||||
}
|
||||
return(fclose(gif_file));
|
||||
}
|
||||
|
||||
#ifndef AMIGA
|
||||
static char *std_args[] = { "tilemap", /* dummy argv[0] */
|
||||
"monsters.gif", "monsters.txt",
|
||||
"objects.gif", "objects.txt",
|
||||
"other.gif", "other.txt" };
|
||||
|
||||
int
|
||||
main(argc, argv)
|
||||
int argc;
|
||||
char *argv[];
|
||||
{
|
||||
pixel pixels[TILE_Y][TILE_X];
|
||||
|
||||
if (argc == 1) {
|
||||
argc = SIZE(std_args);
|
||||
argv = std_args;
|
||||
} else if (argc != 3) {
|
||||
Fprintf(stderr, "usage: gif2txt giffile txtfile\n");
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
while (argc > 1) {
|
||||
if (!fopen_gif_file(argv[1], RDBMODE))
|
||||
exit(EXIT_FAILURE);
|
||||
|
||||
init_colormap();
|
||||
|
||||
if (!fopen_text_file(argv[2], WRTMODE)) {
|
||||
(void) fclose_gif_file();
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
while (read_gif_tile(pixels))
|
||||
(void) write_text_tile(pixels);
|
||||
|
||||
(void) fclose_gif_file();
|
||||
(void) fclose_text_file();
|
||||
|
||||
argc -= 2;
|
||||
argv += 2;
|
||||
}
|
||||
exit(EXIT_SUCCESS);
|
||||
/*NOTREACHED*/
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
Reference in New Issue
Block a user