/* Read Agar archive version information. */
int
AG_ReadVersion(AG_DataSource *ds, const char *name, const AG_Version *ver,
AG_Version *rver)
{
char nbuf[AG_VERSION_NAME_MAX];
size_t nlen;
Uint32 major, minor;
nlen = strlen(name);
if (AG_Read(ds, nbuf, sizeof(nbuf), 1) != 0 ||
strncmp(nbuf, name, nlen) != 0) {
AG_SetError("%s: Bad magic (\"%s\" != %s)", name, nbuf,
name);
return (-1);
}
if (AG_ReadUint32v(ds, &major) == -1 ||
AG_ReadUint32v(ds, &minor) == -1) {
AG_SetError("Reading version numbers: %s", AG_GetError());
return (-1);
}
if (rver != NULL) {
rver->major = major;
rver->minor = minor;
}
if (major != ver->major) {
AG_SetError(_("%s: Major differs: v%u.%u != %u.%u"),
name, (Uint)major, (Uint)minor,
(Uint)ver->major, (Uint)ver->minor);
return (-1);
}
if (minor != ver->minor) {
Verbose(_("Warning: %s: Minor differs: v%u.%u != %u.%u\n"),
name, (Uint)major, (Uint)minor,
(Uint)ver->major, (Uint)ver->minor);
}
return (0);
}
int
main(int argc, char *argv[])
{
char *file, *s;
extern char *optarg;
extern int optind;
int i, c;
AG_DataSource *ds = NULL;
AG_ObjectHeader oh;
Uint32 pos, sLen;
size_t len;
Uint8 *buf, *p;
int asis = 0;
if (AG_InitCore("agar-disasm", 0) == -1) {
return (0);
}
while ((c = getopt(argc, argv, "?")) != -1) {
switch (c) {
case '?':
default:
printusage();
return (1);
}
}
if (argc < 2) {
printusage();
return (1);
}
file = argv[1];
if ((ds = AG_OpenFile(file, "r")) == NULL) {
goto fail;
}
if (AG_ObjectReadHeader(ds, &oh) == -1) {
goto fail;
}
printf("Class:\t\t%s\n", oh.cs.hier);
if (oh.cs.libs[0] != '\0') {
printf("Modules:\t%s\n", oh.cs.libs);
}
printf("Dataset at:\t%lx\n", (unsigned long)oh.dataOffs);
printf("Version:\t%u.%u\n", oh.ver.major, oh.ver.minor);
printf("Flags:\t\t0x%x\n", oh.flags);
printf("\n");
if (AG_Seek(ds, 0, AG_SEEK_END) == -1) {
goto fail;
}
len = AG_Tell(ds) - oh.dataOffs;
if (AG_Seek(ds, (off_t)oh.dataOffs, AG_SEEK_SET) == -1) {
goto fail;
}
pos = 0;
if ((buf = malloc(len)) == NULL) {
AG_SetError("Out of memory for dataset (%lu)",
(unsigned long)len);
goto fail;
}
if (AG_Read(ds, buf, len) == -1)
goto fail;
for (p = buf; ;) {
for (i = 0; i < nTypes; i++) {
if (AG_SwapBE32(*(Uint32 *)p) == types[i].type) {
if (asis) {
printf("\n");
}
asis = 0;
break;
}
}
if (i == nTypes) {
if (!asis) {
printf("[%8s] ", "???");
asis = 1;
}
if (isprint(*(Uint8 *)p)) {
fputc(*(Uint8 *)p, stdout);
} else {
printf("\\%x", *(Uint8 *)p);
}
FORWARD(1);
continue;
}
FORWARD(4);
printf("[%8s] ", types[i].name);
switch (types[i].type) {
case AG_SOURCE_UINT8:
printf("%u\n", *(Uint8 *)p);
FORWARD(1);
break;
case AG_SOURCE_UINT16:
{
Uint16 v = AG_SwapBE16(*(Uint16 *)p);
printf("%u\n", (unsigned)v);
FORWARD(2);
}
break;
case AG_SOURCE_UINT32:
{
Uint32 v = AG_SwapBE32(*(Uint32 *)p);
printf("%lu\n", (unsigned long)v);
FORWARD(4);
}
break;
#ifdef HAVE_64BIT
case AG_SOURCE_UINT64:
{
Uint64 v = AG_SwapBE64(*(Uint64 *)p);
printf("%llu\n", (unsigned long long)v);
FORWARD(8);
}
break;
#endif
case AG_SOURCE_FLOAT:
{
float f = AG_SwapBEFLT(*(float *)p);
printf("%f\n", f);
FORWARD(4);
}
break;
case AG_SOURCE_DOUBLE:
{
double f = AG_SwapBEDBL(*(double *)p);
printf("%f\n", f);
FORWARD(8);
}
break;
#ifdef HAVE_LONG_DOUBLE
case AG_SOURCE_LONG_DOUBLE:
{
long double f=AG_SwapBELDBL(*(long double *)p);
printf("%Lf\n", f);
FORWARD(16);
}
break;
#endif
case AG_SOURCE_STRING:
if (AG_SwapBE32(*(Uint32 *)p) != AG_SOURCE_UINT32) {
printf("Bad string length!\n");
break;
}
FORWARD(4);
sLen = AG_SwapBE32(*(Uint32 *)p);
FORWARD(4);
if ((s = malloc(sLen+1)) == NULL) {
printf("Out of memory for string!\n");
break;
}
memcpy(s, p, sLen);
s[sLen] = '\0';
printf("\"%s\"\n", s);
free(s);
FORWARD(sLen);
break;
default:
printf("(skipping)\n");
break;
}
}
out:
AG_CloseFile(ds);
return (0);
fail:
fprintf(stderr, "%s\n", AG_GetError());
if (ds != NULL) { AG_CloseFile(ds); }
AG_Destroy();
return (1);
}
/*
* Load surface contents from a Windows BMP file.
*
* Code for expanding 1bpp and 4bpp to 8bpp depth was shamefully
* stolen from SDL.
*/
AG_Surface *
AG_ReadSurfaceFromBMP(AG_DataSource *ds)
{
struct ag_bmp_header bh;
struct ag_bmp_info_header bi;
Uint32 Rmask = 0, Gmask = 0, Bmask = 0, Amask = 0;
AG_Surface *s;
off_t offs;
Uint8 *pStart, *pEnd, *pDst;
int i, bmpPitch, expandBpp, bmpPad, topDown;
offs = AG_Tell(ds);
bh.magic[0] = '?';
bh.magic[1] = '?';
if (AG_Read(ds, bh.magic, 2) != 0 ||
bh.magic[0] != 'B' || bh.magic[1] != 'M') {
AG_SetError("Not a Windows BMP file (`%c%c')",
bh.magic[0], bh.magic[1]);
return (NULL);
}
/* Uses little-endian byte order */
AG_SetByteOrder(ds, AG_BYTEORDER_LE);
bh.size = AG_ReadUint32(ds);
bh.resv[0] = AG_ReadUint16(ds);
bh.resv[1] = AG_ReadUint16(ds);
bh.offBits = AG_ReadUint32(ds);
bi.size = AG_ReadUint32(ds);
if (bi.size == 12) {
bi.w = (Uint32)AG_ReadUint16(ds);
bi.h = (Uint32)AG_ReadUint16(ds);
bi.planes = AG_ReadUint16(ds);
bi.bitCount = AG_ReadUint16(ds);
bi.encoding = AG_BMP_RGB;
bi.sizeImage = 0;
bi.XPelsPerMeter = 0;
bi.YPelsPerMeter = 0;
bi.clrUsed = 0;
bi.clrImportant = 0;
} else {
bi.w = AG_ReadSint32(ds);
bi.h = AG_ReadSint32(ds);
bi.planes = AG_ReadUint16(ds);
bi.bitCount = AG_ReadUint16(ds);
bi.encoding = AG_ReadUint32(ds);
bi.sizeImage = AG_ReadUint32(ds);
bi.XPelsPerMeter = AG_ReadUint32(ds);
bi.YPelsPerMeter = AG_ReadUint32(ds);
bi.clrUsed = AG_ReadUint32(ds);
bi.clrImportant = AG_ReadUint32(ds);
}
if (bi.h < 0) {
topDown = 1;
bi.h = -bi.h;
} else {
topDown = 0;
}
/* Will convert 1bpp/4bpp to 8bpp */
if (bi.bitCount == 1 || bi.bitCount == 4) {
expandBpp = bi.bitCount;
bi.bitCount = 8;
} else {
expandBpp = 0;
}
switch (bi.encoding) {
case AG_BMP_RGB:
if (bh.offBits == (14 + bi.size)) {
switch (bi.bitCount) {
case 15:
case 16:
Rmask = 0x7C00;
Gmask = 0x03E0;
Bmask = 0x001F;
break;
case 24:
#if AG_BYTEORDER == AG_BIG_ENDIAN
Rmask = 0x000000FF;
Gmask = 0x0000FF00;
Bmask = 0x00FF0000;
break;
#endif
case 32:
Rmask = 0x00FF0000;
Gmask = 0x0000FF00;
Bmask = 0x000000FF;
break;
}
break;
}
/* FALLTHROUGH */
case AG_BMP_BITFIELDS:
switch (bi.bitCount) {
case 15:
case 16:
Rmask = AG_ReadUint32(ds);
Gmask = AG_ReadUint32(ds);
Bmask = AG_ReadUint32(ds);
break;
case 32:
Rmask = AG_ReadUint32(ds);
Gmask = AG_ReadUint32(ds);
Bmask = AG_ReadUint32(ds);
Amask = AG_ReadUint32(ds);
break;
}
break;
default:
AG_SetError("BMP compression unimplemented");
return (NULL);
}
if ((s = AG_SurfaceRGBA(bi.w, bi.h, bi.bitCount,
(Amask != 0) ? AG_SRCALPHA : 0,
Rmask, Gmask, Bmask, Amask)) == NULL) {
return (NULL);
}
if (s->format->palette != NULL) {
if (bi.clrUsed == 0) {
bi.clrUsed = (1 << bi.bitCount);
}
if (bi.size == 12) {
for (i = 0; i < bi.clrUsed; i++) {
s->format->palette->colors[i].b = AG_ReadUint8(ds);
s->format->palette->colors[i].g = AG_ReadUint8(ds);
s->format->palette->colors[i].r = AG_ReadUint8(ds);
}
} else {
for (i = 0; i < bi.clrUsed; i++) {
s->format->palette->colors[i].b = AG_ReadUint8(ds);
s->format->palette->colors[i].g = AG_ReadUint8(ds);
s->format->palette->colors[i].r = AG_ReadUint8(ds);
(void)AG_ReadUint8(ds); /* unused */
}
}
s->format->palette->nColors = bi.clrUsed;
}
if (AG_Seek(ds, offs+bh.offBits, AG_SEEK_SET) == -1)
goto fail;
pStart = (Uint8 *)s->pixels;
pEnd = (Uint8 *)s->pixels + (s->h*s->pitch);
switch (expandBpp) {
case 1:
bmpPitch = (bi.w + 7) >> 3;
bmpPad = ((bmpPitch % 4) ? (4 - (bmpPitch % 4)) : 0);
break;
case 4:
bmpPitch = (bi.w + 1) >> 1;
bmpPad = ((bmpPitch % 4) ? (4 - (bmpPitch % 4)) : 0);
break;
default:
bmpPad = ((s->pitch % 4) ? (4 - (s->pitch % 4)) : 0);
break;
}
pDst = topDown ? pStart : (pEnd - s->pitch);
while (pDst >= pStart && pDst < pEnd) {
switch (expandBpp) {
case 1:
case 4:
{
Uint8 px = 0;
int shift = (8 - expandBpp);
for (i = 0; i < s->w; i++) {
if (i % (8/expandBpp) == 0) {
px = AG_ReadUint8(ds);
}
*(pDst + i) = (px >> shift);
px <<= expandBpp;
}
}
break;
default:
if (AG_Read(ds, pDst, s->pitch) != 0) {
goto fail;
}
#if AG_BYTEORDER == AG_BIG_ENDIAN
switch (bi.bitCount) {
case 15:
case 16:
{
Uint16 *px = (Uint16 *)pDst;
for (i = 0; i < s->w; i++) {
px[i] = AG_Swap16(px[i]);
}
break;
}
case 32:
{
Uint32 *px = (Uint32 *)pDst;
for (i = 0; i < s->w; i++) {
px[i] = AG_Swap32(px[i]);
}
break;
}
}
#endif /* AG_BYTEORDER == AG_BIG_ENDIAN */
break;
}
if (bmpPad != 0) {
if (AG_Seek(ds, bmpPad, AG_SEEK_CUR) == -1)
goto fail;
}
if (topDown) {
pDst += s->pitch;
} else {
pDst -= s->pitch;
}
}
return (s);
fail:
AG_SurfaceFree(s);
return (NULL);
}
