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373361d9c4
php-src/ext/standard/image.c
Marcus Boerger 373361d9c4 Return FALSE on error as mentioned by John Coggeshall. 
See Bug #20822
2002-12-05 12:39:00 +00:00

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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.txt. |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Rasmus Lerdorf <rasmus@php.net> |
| Marcus Boerger <helly@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include <stdio.h>
#if defined(NETWARE) && !defined(NEW_LIBC)
#include <sys/socket.h>
#endif
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include "fopen_wrappers.h"
#include "ext/standard/fsock.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "php_image.h"
#if HAVE_ZLIB
#include "zlib.h"
#endif
/* file type markers */
PHPAPI const char php_sig_gif[3] = {'G', 'I', 'F'};
PHPAPI const char php_sig_psd[4] = {'8', 'B', 'P', 'S'};
PHPAPI const char php_sig_bmp[2] = {'B', 'M'};
PHPAPI const char php_sig_swf[3] = {'F', 'W', 'S'};
PHPAPI const char php_sig_swc[3] = {'C', 'W', 'S'};
PHPAPI const char php_sig_jpg[3] = {(char) 0xff, (char) 0xd8, (char) 0xff};
PHPAPI const char php_sig_png[8] = {(char) 0x89, (char) 0x50, (char) 0x4e, (char) 0x47,
(char) 0x0d, (char) 0x0a, (char) 0x1a, (char) 0x0a};
PHPAPI const char php_sig_tif_ii[4] = {'I','I', (char)0x2A, (char)0x00};
PHPAPI const char php_sig_tif_mm[4] = {'M','M', (char)0x00, (char)0x2A};
PHPAPI const char php_sig_jpc[3] = {(char)0xFF, (char)0x4F, (char)0xff};
PHPAPI const char php_sig_iff[4] = {'F','O','R','M'};
/* REMEMBER TO ADD MIME-TYPE TO FUNCTION php_image_type_to_mime_type */
/* PCX must check first 64bytes and byte 0=0x0a and byte2 < 0x06 */
/* return info as a struct, to make expansion easier */
struct gfxinfo {
unsigned int width;
unsigned int height;
unsigned int bits;
unsigned int channels;
};
/* {{{ PHP_MINIT_FUNCTION(imagetypes)
* Register IMAGETYPE_<xxx> constants used by GetImageSize(), image_type_to_mime_type, ext/exif */
PHP_MINIT_FUNCTION(imagetypes)
{
REGISTER_LONG_CONSTANT("IMAGETYPE_GIF", IMAGE_FILETYPE_GIF, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_JPEG", IMAGE_FILETYPE_JPEG, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_PNG", IMAGE_FILETYPE_PNG, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_SWF", IMAGE_FILETYPE_SWF, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_PSD", IMAGE_FILETYPE_PSD, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_BMP", IMAGE_FILETYPE_BMP, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_TIFF_II", IMAGE_FILETYPE_TIFF_II, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_TIFF_MM", IMAGE_FILETYPE_TIFF_MM, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_JPC", IMAGE_FILETYPE_JPC, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_JP2", IMAGE_FILETYPE_JP2, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_JPX", IMAGE_FILETYPE_JPX, CONST_CS | CONST_PERSISTENT);
REGISTER_LONG_CONSTANT("IMAGETYPE_JB2", IMAGE_FILETYPE_JB2, CONST_CS | CONST_PERSISTENT);
#if HAVE_ZLIB
REGISTER_LONG_CONSTANT("IMAGETYPE_SWC", IMAGE_FILETYPE_SWC, CONST_CS | CONST_PERSISTENT);
#endif
REGISTER_LONG_CONSTANT("IMAGETYPE_IFF", IMAGE_FILETYPE_IFF, CONST_CS | CONST_PERSISTENT);
return SUCCESS;
}
/* }}} */
/* {{{ php_handle_gif
* routine to handle GIF files. If only everything were that easy... ;} */
static struct gfxinfo *php_handle_gif (php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
unsigned char dim[5];
if (php_stream_seek(stream, 3, SEEK_CUR))
return NULL;
if (php_stream_read(stream, dim, sizeof(dim)) != sizeof(dim))
return NULL;
result = (struct gfxinfo *) ecalloc(1, sizeof(struct gfxinfo));
result->width = (unsigned int)dim[0] | (((unsigned int)dim[1])<<8);
result->height = (unsigned int)dim[2] | (((unsigned int)dim[3])<<8);
result->bits = dim[4]&0x80 ? ((((unsigned int)dim[4])&0x07) + 1) : 0;
result->channels = 3; /* allways */
return result;
}
/* }}} */
/* {{{ php_handle_psd
*/
static struct gfxinfo *php_handle_psd (php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
unsigned char dim[8];
if (php_stream_seek(stream, 11, SEEK_CUR))
return NULL;
if (php_stream_read(stream, dim, sizeof(dim)) != sizeof(dim))
return NULL;
result = (struct gfxinfo *) ecalloc(1, sizeof(struct gfxinfo));
result->height = (((unsigned int)dim[0]) << 24) + (((unsigned int)dim[1]) << 16) + (((unsigned int)dim[2]) << 8) + ((unsigned int)dim[3]);
result->width = (((unsigned int)dim[4]) << 24) + (((unsigned int)dim[5]) << 16) + (((unsigned int)dim[6]) << 8) + ((unsigned int)dim[7]);
return result;
}
/* }}} */
/* {{{ php_handle_bmp
*/
static struct gfxinfo *php_handle_bmp (php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
unsigned char dim[12];
if (php_stream_seek(stream, 15, SEEK_CUR))
return NULL;
if (php_stream_read(stream, dim, sizeof(dim)) != sizeof(dim))
return NULL;
result = (struct gfxinfo *) ecalloc (1, sizeof(struct gfxinfo));
result->width = (((unsigned int)dim[ 3]) << 24) + (((unsigned int)dim[ 2]) << 16) + (((unsigned int)dim[ 1]) << 8) + ((unsigned int) dim[ 0]);
result->height = (((unsigned int)dim[ 7]) << 24) + (((unsigned int)dim[ 6]) << 16) + (((unsigned int)dim[ 5]) << 8) + ((unsigned int) dim[ 4]);
result->bits = (((unsigned int)dim[11]) << 8) + ((unsigned int)dim[10]);
return result;
}
/* }}} */
/* {{{ php_swf_get_bits
* routines to handle SWF files. */
static unsigned long int php_swf_get_bits (unsigned char* buffer, unsigned int pos, unsigned 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;
}
/* }}} */
#if HAVE_ZLIB
/* {{{ php_handle_swc
*/
static struct gfxinfo *php_handle_swc(php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
long bits;
unsigned char a[64];
unsigned long len=64, szlength;
int factor=1,maxfactor=16;
int slength, status=0;
char *b, *buf=NULL, *bufz=NULL;
b = ecalloc (1, len + 1);
if (php_stream_seek(stream, 5, SEEK_CUR))
return NULL;
if (php_stream_read(stream, a, sizeof(a)) != sizeof(a))
return NULL;
if (uncompress(b, &len, a, sizeof(a)) != Z_OK) {
/* failed to decompress the file, will try reading the rest of the file */
if (php_stream_seek(stream, 8, SEEK_SET))
return NULL;
slength = php_stream_copy_to_mem(stream, &bufz, PHP_STREAM_COPY_ALL, 0);
/*
* zlib::uncompress() wants to know the output data length
* if none was given as a parameter
* we try from input length * 2 up to input length * 2^8
* doubling it whenever it wasn't big enough
* that should be eneugh for all real life cases
*/
do {
szlength=slength*(1<<factor++);
buf = (char *) erealloc(buf,szlength);
if (!buf) {
status = 1;
break;
}
status = uncompress(buf, &szlength, bufz, slength);
} while ((status==Z_BUF_ERROR)&&(factor<maxfactor));
if (bufz) {
pefree(bufz, 0);
}
if (status == Z_OK) {
memcpy(b, buf, len);
}
if (buf) {
efree(buf);
}
}
if (!status) {
result = (struct gfxinfo *) ecalloc (1, sizeof (struct gfxinfo));
bits = php_swf_get_bits (b, 0, 5);
result->width = (php_swf_get_bits (b, 5 + bits, bits) -
php_swf_get_bits (b, 5, bits)) / 20;
result->height = (php_swf_get_bits (b, 5 + (3 * bits), bits) -
php_swf_get_bits (b, 5 + (2 * bits), bits)) / 20;
} else {
result = NULL;
}
efree (b);
return result;
}
/* }}} */
#endif
/* {{{ php_handle_swf
*/
static struct gfxinfo *php_handle_swf (php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
long bits;
unsigned char a[32];
if (php_stream_seek(stream, 5, SEEK_CUR))
return NULL;
if (php_stream_read(stream, a, sizeof(a)) != sizeof(a))
return NULL;
result = (struct gfxinfo *) ecalloc (1, sizeof (struct gfxinfo));
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;
result->bits = 0;
result->channels = 0;
return result;
}
/* }}} */
/* {{{ php_handle_png
* routine to handle PNG files */
static struct gfxinfo *php_handle_png (php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
unsigned char dim[9];
/* Width: 4 bytes
* Height: 4 bytes
* Bit depth: 1 byte
* Color type: 1 byte
* Compression method: 1 byte
* Filter method: 1 byte
* Interlace method: 1 byte
*/
if (php_stream_seek(stream, 8, SEEK_CUR))
return NULL;
if((php_stream_read(stream, dim, sizeof(dim))) < sizeof(dim))
return NULL;
result = (struct gfxinfo *) ecalloc(1, sizeof(struct gfxinfo));
result->width = (((unsigned int)dim[0]) << 24) + (((unsigned int)dim[1]) << 16) + (((unsigned int)dim[2]) << 8) + ((unsigned int)dim[3]);
result->height = (((unsigned int)dim[4]) << 24) + (((unsigned int)dim[5]) << 16) + (((unsigned int)dim[6]) << 8) + ((unsigned int)dim[7]);
result->bits = (unsigned int)dim[8];
return result;
}
/* }}} */
/* routines to handle JPEG data */
/* some defines for the different JPEG block types */
#define M_SOF0 0xC0 /* Start Of Frame N */
#define M_SOF1 0xC1 /* N indicates which compression process */
#define M_SOF2 0xC2 /* Only SOF0-SOF2 are now in common use */
#define M_SOF3 0xC3
#define M_SOF5 0xC5 /* NB: codes C4 and CC are NOT SOF markers */
#define M_SOF6 0xC6
#define M_SOF7 0xC7
#define M_SOF9 0xC9
#define M_SOF10 0xCA
#define M_SOF11 0xCB
#define M_SOF13 0xCD
#define M_SOF14 0xCE
#define M_SOF15 0xCF
#define M_SOI 0xD8
#define M_EOI 0xD9 /* End Of Image (end of datastream) */
#define M_SOS 0xDA /* Start Of Scan (begins compressed data) */
#define M_APP0 0xe0
#define M_APP1 0xe1
#define M_APP2 0xe2
#define M_APP3 0xe3
#define M_APP4 0xe4
#define M_APP5 0xe5
#define M_APP6 0xe6
#define M_APP7 0xe7
#define M_APP8 0xe8
#define M_APP9 0xe9
#define M_APP10 0xea
#define M_APP11 0xeb
#define M_APP12 0xec
#define M_APP13 0xed
#define M_APP14 0xee
#define M_APP15 0xef
#define M_COM 0xFE /* COMment */
#define M_PSEUDO 0xFFD8 /* pseudo marker for start of image(byte 0) */
/* {{{ php_read2
*/
static unsigned short php_read2(php_stream * stream TSRMLS_DC)
{
unsigned char a[2];
/* just return 0 if we hit the end-of-file */
if((php_stream_read(stream, a, sizeof(a))) <= 0) return 0;
return (((unsigned short) a[ 0 ]) << 8) + ((unsigned short) a[ 1 ]);
}
/* }}} */
/* {{{ php_next_marker
* get next marker byte from file */
static unsigned int php_next_marker(php_stream * stream, int last_marker, int comment_correction, int ff_read TSRMLS_DC)
{
int a=0, marker;
/* get marker byte, swallowing possible padding */
if ( last_marker==M_COM && comment_correction) {
/* some software does not count the length bytes of COM section */
/* one company doing so is very much envolved in JPEG... so we accept too */
/* by the way: some of those companies changed their code now... */
comment_correction = 2;
} else {
last_marker = 0;
comment_correction = 0;
}
if ( ff_read) {
a = 1; /* already read 0xff in filetype detection */
}
do {
if ((marker = php_stream_getc(stream)) == EOF)
{
return M_EOI;/* we hit EOF */
}
if ( last_marker==M_COM && comment_correction>0)
{
if ( marker != 0xFF)
{
marker = 0xff;
comment_correction--;
} else {
last_marker = M_PSEUDO; /* stop skipping non 0xff for M_COM */
}
}
if ( ++a > 10)
{
/* who knows the maxim amount of 0xff? though 7 */
/* but found other implementations */
return M_EOI;
}
} while ( marker == 0xff);
if ( a < 2)
{
return M_EOI; /* at least one 0xff is needed before marker code */
}
if ( last_marker==M_COM && comment_correction)
{
return M_EOI; /* ah illegal: char after COM section not 0xFF */
}
return (unsigned int)marker;
}
/* }}} */
/* {{{ php_skip_variable
* skip over a variable-length block; assumes proper length marker */
static void php_skip_variable(php_stream * stream TSRMLS_DC)
{
off_t length = ((unsigned int)php_read2(stream TSRMLS_CC));
length = length-2;
if (length)
{
php_stream_seek(stream, (long)length, SEEK_CUR);
}
}
/* }}} */
/* {{{ php_read_APP
*/
static void php_read_APP(php_stream * stream, unsigned int marker, zval *info TSRMLS_DC)
{
unsigned short length;
unsigned char *buffer;
unsigned char markername[ 16 ];
zval *tmp;
length = php_read2(stream TSRMLS_CC);
length -= 2; /* length includes itself */
buffer = emalloc(length);
if ( !buffer) return;
if (php_stream_read(stream, buffer, (long) length) <= 0) {
efree(buffer);
return;
}
sprintf(markername, "APP%d", marker - M_APP0);
if (zend_hash_find(Z_ARRVAL_P(info), markername, strlen(markername)+1, (void **) &tmp) == FAILURE) {
/* XXX we onyl catch the 1st tag of it's kind! */
add_assoc_stringl(info, markername, buffer, length, 1);
}
efree(buffer);
}
/* }}} */
/* {{{ php_handle_jpeg
main loop to parse JPEG structure */
static struct gfxinfo *php_handle_jpeg (php_stream * stream, pval *info TSRMLS_DC)
{
struct gfxinfo *result = NULL;
unsigned int marker = M_PSEUDO;
unsigned short length, ff_read=1;
for (;;) {
marker = php_next_marker(stream, marker, 1, ff_read TSRMLS_CC);
ff_read = 0;
switch (marker) {
case M_SOF0:
case M_SOF1:
case M_SOF2:
case M_SOF3:
case M_SOF5:
case M_SOF6:
case M_SOF7:
case M_SOF9:
case M_SOF10:
case M_SOF11:
case M_SOF13:
case M_SOF14:
case M_SOF15:
if (result == NULL) {
/* handle SOFn block */
result = (struct gfxinfo *) ecalloc(1, sizeof(struct gfxinfo));
if ( !result)
return NULL;
length = php_read2(stream TSRMLS_CC);
result->bits = php_stream_getc(stream);
result->height = php_read2(stream TSRMLS_CC);
result->width = php_read2(stream TSRMLS_CC);
result->channels = php_stream_getc(stream);
if (!info || length<8) /* if we don't want an extanded info -> return */
return result;
if (php_stream_seek(stream, length-8, SEEK_CUR)) /* file error after info */
return result;
} else {
php_skip_variable(stream TSRMLS_CC);
}
break;
case M_APP0:
case M_APP1:
case M_APP2:
case M_APP3:
case M_APP4:
case M_APP5:
case M_APP6:
case M_APP7:
case M_APP8:
case M_APP9:
case M_APP10:
case M_APP11:
case M_APP12:
case M_APP13:
case M_APP14:
case M_APP15:
if (info) {
php_read_APP(stream, marker, info TSRMLS_CC); /* read all the app markes... */
} else {
php_skip_variable(stream TSRMLS_CC);
}
break;
case M_SOS:
case M_EOI:
return result; /* we're about to hit image data, or are at EOF. stop processing. */
default:
php_skip_variable(stream TSRMLS_CC); /* anything else isn't interesting */
break;
}
}
return result; /* perhaps image broken -> no info but size */
}
/* }}} */
/* {{{ jpeg2000 constants
See ext/exif for more */
#define JC_SOC 0x4F /* Start of codestream */
#define JC_SIZ 0x51 /* Image and tile size */
/* }}} */
/* {{{ php_read4
*/
static unsigned int php_read4(php_stream * stream TSRMLS_DC)
{
unsigned char a[4];
/* just return 0 if we hit the end-of-file */
if ((php_stream_read(stream, a, sizeof(a))) != sizeof(a)) return 0;
return (((unsigned int)a[0]) << 24)
+ (((unsigned int)a[1]) << 16)
+ (((unsigned int)a[2]) << 8)
+ (((unsigned int)a[3]));
}
/* }}} */
/* {{{ php_handle_tiff
main loop to parse TIFF structure */
static struct gfxinfo *php_handle_jpc(php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
unsigned int marker, dummy;
unsigned short length, ff_read = 1;
marker = php_next_marker(stream, 0, 0, ff_read TSRMLS_CC);
ff_read = 0;
if ( marker == JC_SIZ)
{
length = php_read2(stream TSRMLS_CC); /* Lsiz: length of segment */
if ( length<42 || length>49191) /* read the spec */
return NULL;
result = (struct gfxinfo *) ecalloc(1, sizeof(struct gfxinfo));
if ( !result)
return NULL;
dummy = php_read2(stream TSRMLS_CC); /* Rsiz: capabilities */
result->height = php_read4(stream TSRMLS_CC); /* Xsiz */
result->width = php_read4(stream TSRMLS_CC); /* Ysiz */
dummy = php_read4(stream TSRMLS_CC); /* X0siz */
dummy = php_read4(stream TSRMLS_CC); /* Y0siz */
dummy = php_read4(stream TSRMLS_CC); /* XTsiz */
dummy = php_read4(stream TSRMLS_CC); /* YTsiz */
dummy = php_read4(stream TSRMLS_CC); /* XT0siz */
dummy = php_read4(stream TSRMLS_CC); /* YT0siz */
result->bits = php_read2(stream TSRMLS_CC); /* Csiz: precision in bitss */
result->channels = 0; /* don't know yet */
return result;
}
return result;
}
/* }}} */
/* {{{ tiff constants
*/
PHPAPI const int php_tiff_bytes_per_format[] = {0, 1, 1, 2, 4, 8, 1, 1, 2, 4, 8, 4, 8};
/* uncompressed only */
#define TAG_IMAGEWIDTH 0x0100
#define TAG_IMAGEHEIGHT 0x0101
/* compressed images only */
#define TAG_COMP_IMAGEWIDTH 0xA002
#define TAG_COMP_IMAGEHEIGHT 0xA003
#define TAG_FMT_BYTE 1
#define TAG_FMT_STRING 2
#define TAG_FMT_USHORT 3
#define TAG_FMT_ULONG 4
#define TAG_FMT_URATIONAL 5
#define TAG_FMT_SBYTE 6
#define TAG_FMT_UNDEFINED 7
#define TAG_FMT_SSHORT 8
#define TAG_FMT_SLONG 9
#define TAG_FMT_SRATIONAL 10
#define TAG_FMT_SINGLE 11
#define TAG_FMT_DOUBLE 12
/* }}} */
/* {{{ php_ifd_get16u
* Convert a 16 bit unsigned value from file's native byte order */
static int php_ifd_get16u(void *Short, int motorola_intel)
{
if (motorola_intel) {
return (((unsigned char *)Short)[0] << 8) | ((unsigned char *)Short)[1];
} else {
return (((unsigned char *)Short)[1] << 8) | ((unsigned char *)Short)[0];
}
}
/* }}} */
/* {{{ php_ifd_get16s
* Convert a 16 bit signed value from file's native byte order */
static signed short php_ifd_get16s(void *Short, int motorola_intel)
{
return (signed short)php_ifd_get16u(Short, motorola_intel);
}
/* }}} */
/* {{{ php_ifd_get32s
* Convert a 32 bit signed value from file's native byte order */
static int php_ifd_get32s(void *Long, int motorola_intel)
{
if (motorola_intel) {
return ((( char *)Long)[0] << 24) | (((unsigned char *)Long)[1] << 16)
| (((unsigned char *)Long)[2] << 8 ) | (((unsigned char *)Long)[3] << 0 );
} else {
return ((( char *)Long)[3] << 24) | (((unsigned char *)Long)[2] << 16)
| (((unsigned char *)Long)[1] << 8 ) | (((unsigned char *)Long)[0] << 0 );
}
}
/* }}} */
/* {{{ php_ifd_get32u
* Convert a 32 bit unsigned value from file's native byte order */
static unsigned php_ifd_get32u(void *Long, int motorola_intel)
{
return (unsigned)php_ifd_get32s(Long, motorola_intel) & 0xffffffff;
}
/* }}} */
/* {{{ php_handle_tiff
main loop to parse TIFF structure */
static struct gfxinfo *php_handle_tiff (php_stream * stream, pval *info, int motorola_intel TSRMLS_DC)
{
struct gfxinfo *result = NULL;
int i, num_entries;
unsigned char *dir_entry;
size_t ifd_size, dir_size, entry_value, width=0, height=0, ifd_addr;
int entry_tag , entry_type;
char *ifd_data, ifd_ptr[4];
if (php_stream_read(stream, ifd_ptr, 4) != 4)
return NULL;
ifd_addr = php_ifd_get32u(ifd_ptr, motorola_intel);
if (php_stream_seek(stream, ifd_addr-8, SEEK_CUR))
return NULL;
ifd_size = 2;
ifd_data = emalloc(ifd_size);
if (php_stream_read(stream, ifd_data, 2) != 2) {
efree(ifd_data);
return NULL;
}
num_entries = php_ifd_get16u(ifd_data, motorola_intel);
dir_size = 2/*num dir entries*/ +12/*length of entry*/*num_entries +4/* offset to next ifd (points to thumbnail or NULL)*/;
ifd_size = dir_size;
ifd_data = erealloc(ifd_data,ifd_size);
if (php_stream_read(stream, ifd_data+2, dir_size-2) != dir_size-2) {
efree(ifd_data);
return NULL;
}
/* now we have the directory we can look how long it should be */
ifd_size = dir_size;
for(i=0;i<num_entries;i++) {
dir_entry = ifd_data+2+i*12;
entry_tag = php_ifd_get16u(dir_entry+0, motorola_intel);
entry_type = php_ifd_get16u(dir_entry+2, motorola_intel);
switch(entry_type) {
case TAG_FMT_BYTE:
case TAG_FMT_SBYTE:
entry_value = (size_t)(dir_entry[8]);
break;
case TAG_FMT_USHORT:
entry_value = php_ifd_get16u(dir_entry+8, motorola_intel);
break;
case TAG_FMT_SSHORT:
entry_value = php_ifd_get16s(dir_entry+8, motorola_intel);
break;
case TAG_FMT_ULONG:
entry_value = php_ifd_get32u(dir_entry+8, motorola_intel);
break;
case TAG_FMT_SLONG:
entry_value = php_ifd_get32s(dir_entry+8, motorola_intel);
break;
default:
continue;
}
switch(entry_tag) {
case TAG_IMAGEWIDTH:
case TAG_COMP_IMAGEWIDTH:
width = entry_value;
break;
case TAG_IMAGEHEIGHT:
case TAG_COMP_IMAGEHEIGHT:
height = entry_value;
break;
}
}
efree(ifd_data);
if ( width && height) {
/* not the same when in for-loop */
result = (struct gfxinfo *) ecalloc(1, sizeof(struct gfxinfo));
result->height = height;
result->width = width;
result->bits = 0;
result->channels = 0;
return result;
}
return NULL;
}
/* }}} */
/* {{{ php_handle_psd
*/
static struct gfxinfo *php_handle_iff(php_stream * stream TSRMLS_DC)
{
struct gfxinfo *result = NULL;
unsigned char a[10];
int chunkId;
int size;
if (php_stream_read(stream, a, 8) != 8)
return NULL;
if (strncmp(a+4, "ILBM", 4) && strncmp(a+4, "PBM ", 4))
return NULL;
result = (struct gfxinfo *) ecalloc(1, sizeof(struct gfxinfo));
/* loop chunks to find BMHD chunk */
do {
if (php_stream_read(stream, a, 8) != 8) {
efree(result);
return NULL;
}
chunkId = php_ifd_get32s(a+0, 1);
size = php_ifd_get32s(a+4, 1);
if ((size & 1) == 1) {
size++;
}
if (chunkId == 0x424d4844) { /* BMHD chunk */
if (php_stream_read(stream, a, 9) != 9) {
efree(result);
return NULL;
}
result->width = php_ifd_get16s(a+0, 1);
result->height = php_ifd_get16s(a+2, 1);
result->bits = a[8] & 0xff;
result->channels = 0;
if (result->width > 0 && result->height > 0 && result->bits > 0 && result->bits < 33)
return result;
} else {
if (php_stream_seek(stream, size, SEEK_CUR)) {
efree(result);
return NULL;
}
}
} while (1);
}
/* }}} */
/* {{{ php_image_type_to_mime_type
* Convert internal image_type to mime type */
PHPAPI const char * php_image_type_to_mime_type(int image_type)
{
switch( image_type) {
case IMAGE_FILETYPE_GIF:
return "image/gif";
case IMAGE_FILETYPE_JPEG:
case IMAGE_FILETYPE_JPC:
return "image/jpeg";
case IMAGE_FILETYPE_PNG:
return "image/png";
case IMAGE_FILETYPE_SWF:
case IMAGE_FILETYPE_SWC:
return "application/x-shockwave-flash";
case IMAGE_FILETYPE_PSD:
return "image/psd";
case IMAGE_FILETYPE_BMP:
return "image/bmp";
case IMAGE_FILETYPE_TIFF_II:
case IMAGE_FILETYPE_TIFF_MM:
return "image/tiff";
case IMAGE_FILETYPE_IFF:
return "image/iff";
default:
case IMAGE_FILETYPE_UNKNOWN:
return "application/octet-stream"; /* suppose binary format */
}
}
/* }}} */
/* {{{ proto string image_type_to_mime_type(int imagetype)
Get Mime-Type for image-type returned by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype */
PHP_FUNCTION(image_type_to_mime_type)
{
zval **p_image_type;
int arg_c = ZEND_NUM_ARGS();
if ((arg_c!=1) || zend_get_parameters_ex(arg_c, &p_image_type) == FAILURE) {
RETVAL_FALSE;
WRONG_PARAM_COUNT;
}
convert_to_long_ex(p_image_type);
ZVAL_STRING(return_value, (char*)php_image_type_to_mime_type(Z_LVAL_PP(p_image_type)), 1);
}
/* }}} */
/* {{{ php_imagetype
detect filetype from first bytes */
PHPAPI int php_getimagetype(php_stream * stream, char *filetype TSRMLS_DC)
{
char tmp[8];
if ( !filetype) filetype = tmp;
if((php_stream_read(stream, filetype, 3)) <= 0) {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Read error!");
return IMAGE_FILETYPE_UNKNOWN;
}
if (!memcmp(filetype, php_sig_gif, 3)) {
return IMAGE_FILETYPE_GIF;
} else if (!memcmp(filetype, php_sig_jpg, 3)) {
return IMAGE_FILETYPE_JPEG;
} else if (!memcmp(filetype, php_sig_png, 3)) {
php_stream_read(stream, filetype+3, 5);
if (!memcmp(filetype, php_sig_png, 8)) {
return IMAGE_FILETYPE_PNG;
} else {
php_error_docref(NULL TSRMLS_CC, E_WARNING, "PNG file corrupted by ASCII conversion");
return IMAGE_FILETYPE_UNKNOWN;
}
} else if (!memcmp(filetype, php_sig_swf, 3)) {
return IMAGE_FILETYPE_SWF;
} else if (!memcmp(filetype, php_sig_swc, 3)) {
return IMAGE_FILETYPE_SWC;
} else if (!memcmp(filetype, php_sig_psd, 3)) {
return IMAGE_FILETYPE_PSD;
} else if (!memcmp(filetype, php_sig_bmp, 2)) {
return IMAGE_FILETYPE_BMP;
} else if (!memcmp(filetype, php_sig_jpc, 3)) {
return IMAGE_FILETYPE_JPC;
}
php_stream_read(stream, filetype+3, 1);
if (!memcmp(filetype, php_sig_tif_ii, 4)) {
return IMAGE_FILETYPE_TIFF_II;
} else
if (!memcmp(filetype, php_sig_tif_mm, 4)) {
return IMAGE_FILETYPE_TIFF_MM;
}
if (!memcmp(filetype, php_sig_iff, 4)) {
return IMAGE_FILETYPE_IFF;
}
return IMAGE_FILETYPE_UNKNOWN;
}
/* }}} */
/* {{{ proto array getimagesize(string imagefile [, array info])
Get the size of an image as 4-element array */
PHP_FUNCTION(getimagesize)
{
zval **arg1, **info = NULL;
int itype = 0;
char *temp;
struct gfxinfo *result = NULL;
php_stream * stream = NULL;
switch(ZEND_NUM_ARGS()) {
case 1:
if (zend_get_parameters_ex(1, &arg1) == FAILURE) {
RETVAL_FALSE;
WRONG_PARAM_COUNT;
}
convert_to_string_ex(arg1);
break;
case 2:
if (zend_get_parameters_ex(2, &arg1, &info) == FAILURE) {
RETVAL_FALSE;
WRONG_PARAM_COUNT;
}
zval_dtor(*info);
if (array_init(*info) == FAILURE) {
RETURN_FALSE;
}
convert_to_string_ex(arg1);
break;
default:
RETVAL_FALSE;
WRONG_PARAM_COUNT;
}
stream = php_stream_open_wrapper(Z_STRVAL_PP(arg1), "rb", REPORT_ERRORS|IGNORE_PATH|ENFORCE_SAFE_MODE, NULL);
if (!stream) {
RETURN_FALSE;
}
itype = php_getimagetype(stream, NULL TSRMLS_CC);
switch( itype) {
case IMAGE_FILETYPE_GIF:
result = php_handle_gif (stream TSRMLS_CC);
break;
case IMAGE_FILETYPE_JPEG:
if (info) {
result = php_handle_jpeg(stream, *info TSRMLS_CC);
} else {
result = php_handle_jpeg(stream, NULL TSRMLS_CC);
}
break;
case IMAGE_FILETYPE_PNG:
result = php_handle_png(stream TSRMLS_CC);
break;
case IMAGE_FILETYPE_SWF:
result = php_handle_swf(stream TSRMLS_CC);
break;
#if HAVE_ZLIB
case IMAGE_FILETYPE_SWC:
result = php_handle_swc(stream TSRMLS_CC);
break;
#endif
case IMAGE_FILETYPE_PSD:
result = php_handle_psd(stream TSRMLS_CC);
break;
case IMAGE_FILETYPE_BMP:
result = php_handle_bmp(stream TSRMLS_CC);
break;
case IMAGE_FILETYPE_TIFF_II:
result = php_handle_tiff(stream, NULL, 0 TSRMLS_CC);
break;
case IMAGE_FILETYPE_TIFF_MM:
result = php_handle_tiff(stream, NULL, 1 TSRMLS_CC);
break;
case IMAGE_FILETYPE_JPC:
result = php_handle_jpc(stream TSRMLS_CC);
break;
case IMAGE_FILETYPE_IFF:
result = php_handle_iff(stream TSRMLS_CC);
default:
case IMAGE_FILETYPE_UNKNOWN:
break;
}
php_stream_close(stream);
if (result) {
if (array_init(return_value) == FAILURE) {
php_error_docref(NULL TSRMLS_CC, E_ERROR, "Unable to initialize array");
efree(result);
RETURN_FALSE;
}
add_index_long(return_value, 0, result->width);
add_index_long(return_value, 1, result->height);
add_index_long(return_value, 2, itype);
spprintf(&temp, 0, "width=\"%d\" height=\"%d\"", result->width, result->height);
add_index_string(return_value, 3, temp, 0);
if (result->bits != 0) {
add_assoc_long(return_value, "bits", result->bits);
}
if (result->channels != 0) {
add_assoc_long(return_value, "channels", result->channels);
}
add_assoc_string(return_value, "mime", (char*)php_image_type_to_mime_type(itype), 1);
efree(result);
} else {
RETURN_FALSE;
}
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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