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@ Add SWF support to getimagesize() function (Derick Rethans)

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Add SWF support to getimagesize() function
This commit is contained in:
Rasmus Lerdorf
2000-06-04 18:29:15 +00:00
parent 8aa6d9cb35
commit 7eec1997ef
1 changed files with 35 additions and 0 deletions
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35
ext/standard/image.c
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@@ -56,6 +56,8 @@ const char php_sig_png[8] =
{(char) 0x89, (char) 0x50, (char) 0x4e,
(char) 0x47, (char) 0x0d, (char) 0x0a,
(char) 0x1a, (char) 0x0a};
const char php_sig_swf[3] =
{'F', 'W', 'S'};
/* return info as a struct, to make expansion easier */
@@ -92,6 +94,36 @@ static unsigned long php_read4(FILE *fp)
}
static unsigned long int php_swf_get_bits (unsigned char* buffer, int pos, int count)
{
unsigned int loop;
unsigned long int result = 0;
for (loop = pos; loop < pos + count; loop++)
{
result = result +
((((buffer[loop / 8]) >> (7 - (loop % 8))) & 0x01) << (count - (loop - pos) - 1));
}
return result;
}
static struct gfxinfo *php_handle_swf (FILE* fp)
{
struct gfxinfo *result = NULL;
unsigned char bits;
unsigned char a[32];
result = (struct gfxinfo *) ecalloc (1, sizeof (struct gfxinfo));
fseek(fp, 8, SEEK_SET);
fread(a,sizeof(a),1,fp);
bits = php_swf_get_bits (a, 0, 5);
result->width = (php_swf_get_bits (a, 5 + bits, bits) -
php_swf_get_bits (a, 5, bits)) / 20;
result->height = (php_swf_get_bits (a, 5 + (3 * bits), bits) -
php_swf_get_bits (a, 5 + (2 * bits), bits)) / 20;
return result;
}
/* routine to handle PNG files. - even easier */
static struct gfxinfo *php_handle_png(FILE *fp)
{
@@ -365,6 +397,9 @@ PHP_FUNCTION(getimagesize)
} else {
php_error(E_WARNING, "PNG file corrupted by ASCII conversion");
}
} else if (!memcmp(filetype, php_sig_swf, 3)) {
result = php_handle_swf(fp);
itype = 4;
}
fclose(fp);
if (result) {