bool MCImageGetMetafileGeometry(IO_handle p_stream, uindex_t &r_width, uindex_t &r_height)
{
bool t_success = true;
bool t_is_meta = false;
uindex_t t_stream_pos = MCS_tell(p_stream);
uint8_t t_head[DRAWING_HEAD_SIZE];
uindex_t t_size = DRAWING_HEAD_SIZE;
t_success = IO_NORMAL == MCS_readfixed(t_head, t_size, p_stream) &&
t_size == DRAWING_HEAD_SIZE;
/* A drawing's header is of the form:
* 0: LCD\0
* 4: width
* 8: height
*/
if (t_success &&
memcmp(t_head, "LCD\0", 4) == 0)
{
float t_width = *(const float *)(t_head + 4);
float t_height = *(const float *)(t_head + 8);
/* The engine deals with integer bounds on sub-pixel co-ords, so
* take the ceiling of the computer (float) width/height. */
r_width = (uindex_t)ceilf(t_width);
r_height = (uindex_t)ceilf(t_height);
t_is_meta = true;
}
MCS_seek_set(p_stream, t_stream_pos);
return t_success && t_is_meta;
}
bool MCStreamCache::ReadFromCache(void *p_buffer, uint32_t p_offset, uint32_t p_length, uint32_t &r_read)
{
uint32_t t_to_read;
if (m_cache_buffer != NULL)
{
r_read = MCMin(p_length, m_cache_length - p_offset);
MCMemoryCopy(p_buffer, (uint8_t*)m_cache_buffer + p_offset, r_read);
return true;
}
else if (m_cache_file != NULL)
{
bool t_success = true;
IO_stat t_status;
t_success = (IO_NORMAL == MCS_seek_set(m_cache_file, p_offset));
if (t_success)
t_success = (IO_ERROR != MCS_read(p_buffer, 1, p_length, m_cache_file));
if (t_success)
{
r_read = p_length;
}
return t_success;
}
r_read = 0;
return true;
}
bool Rewind(void)
{
return MCS_seek_set(handle, 0) == IO_NORMAL;
}
// MW-2012-02-17: [[ LogFonts ]] Actually load the stack file (wrapped by readfile
// to handle font table cleanup).
IO_stat MCDispatch::doreadfile(const char *openpath, const char *inname, IO_handle &stream, MCStack *&sptr)
{
Boolean loadhome = False;
char version[8];
if (readheader(stream, version) == IO_NORMAL)
{
if (strcmp(version, MCversionstring) > 0)
{
MCresult->sets("stack was produced by a newer version");
return IO_ERROR;
}
// MW-2008-10-20: [[ ParentScripts ]] Set the boolean flag that tells us whether
// parentscript resolution is required to false.
s_loaded_parent_script_reference = false;
uint1 charset, type;
char *newsf;
if (IO_read_uint1(&charset, stream) != IO_NORMAL
|| IO_read_uint1(&type, stream) != IO_NORMAL
|| IO_read_string(newsf, stream) != IO_NORMAL)
{
MCresult->sets("stack is corrupted, check for ~ backup file");
return IO_ERROR;
}
delete newsf; // stackfiles is obsolete
MCtranslatechars = charset != CHARSET;
sptr = nil;
/* UNCHECKED */ MCStackSecurityCreateStack(sptr);
if (stacks == NULL)
sptr->setparent(this);
else
sptr->setparent(stacks);
sptr->setfilename(strclone(openpath));
if (MCModeCanLoadHome() && type == OT_HOME)
{
char *lstring = NULL;
char *cstring = NULL;
IO_read_string(lstring, stream);
IO_read_string(cstring, stream);
delete lstring;
delete cstring;
}
MCresult -> clear();
if (IO_read_uint1(&type, stream) != IO_NORMAL
|| type != OT_STACK && type != OT_ENCRYPT_STACK
|| sptr->load(stream, version, type) != IO_NORMAL)
{
if (MCresult -> isclear())
MCresult->sets("stack is corrupted, check for ~ backup file");
destroystack(sptr, False);
sptr = NULL;
return IO_ERROR;
}
// MW-2011-08-09: [[ Groups ]] Make sure F_GROUP_SHARED is set
// appropriately.
sptr -> checksharedgroups();
if (sptr->load_substacks(stream, version) != IO_NORMAL
|| IO_read_uint1(&type, stream) != IO_NORMAL
|| type != OT_END)
{
if (MCresult -> isclear())
MCresult->sets("stack is corrupted, check for ~ backup file");
destroystack(sptr, False);
sptr = NULL;
return IO_ERROR;
}
if (stacks != NULL)
{
MCStack *tstk = stacks;
do
{
if (sptr->hasname(tstk->getname()))
{
MCAutoNameRef t_stack_name;
/* UNCHECKED */ t_stack_name . Clone(sptr -> getname());
delete sptr;
sptr = NULL;
if (strequal(tstk->getfilename(), openpath))
sptr = tstk;
else
{
MCdefaultstackptr->getcard()->message_with_args(MCM_reload_stack, MCNameGetOldString(tstk->getname()), openpath);
tstk = stacks;
do
{
if (MCNameIsEqualTo(t_stack_name, tstk->getname(), kMCCompareCaseless))
{
sptr = tstk;
break;
}
tstk = (MCStack *)tstk->next();
}
while (tstk != stacks);
}
return IO_NORMAL;
}
tstk = (MCStack *)tstk->next();
}
while (tstk != stacks);
}
appendstack(sptr);
sptr->extraopen(false);
// MW-2008-10-28: [[ ParentScript ]]
// We just loaded a stackfile, so check to see if parentScript resolution
// is required and if so do it.
// MW-2009-01-28: [[ Inherited parentScripts ]]
// Resolving parentScripts may allocate memory, so 'resolveparentscripts'
// will return false if it fails to allocate what it needs. At some point
// this needs to be dealt with by deleting the stack and returning an error,
// *However* at the time of writing, 'readfile' isn't designed to handle
// this - so we just ignore the result for now (note that all the 'load'
// methods *fail* to check for no-memory errors!).
if (s_loaded_parent_script_reference)
sptr -> resolveparentscripts();
}
else
{
MCS_seek_set(stream, 0);
if (stacks == NULL)
{
MCnoui = True;
MCscreen = new MCUIDC;
/* UNCHECKED */ MCStackSecurityCreateStack(stacks);
MCdefaultstackptr = MCstaticdefaultstackptr = stacks;
stacks->setparent(this);
stacks->setname_cstring("revScript");
uint4 size = (uint4)MCS_fsize(stream);
char *script = new char[size + 2];
script[size] = '\n';
script[size + 1] = '\0';
if (IO_read(script, sizeof(char), size, stream) != IO_NORMAL
|| !stacks->setscript(script))
{
delete script;
return IO_ERROR;
}
}
else
{
char *tname = strclone(inname);
// MW-2008-06-12: [[ Bug 6476 ]] Media won't open HC stacks
if (!MCdispatcher->cut(True) || hc_import(tname, stream, sptr) != IO_NORMAL)
{
MCresult->sets("file is not a stack");
delete tname;
return IO_ERROR;
}
}
}
return IO_NORMAL;
}
bool MCImageGetMetafileGeometry(IO_handle p_stream, uindex_t &r_width, uindex_t &r_height)
{
bool t_success = true;
bool t_is_meta = false;
uindex_t t_stream_pos = MCS_tell(p_stream);
uint8_t t_head[EMF_HEAD_SIZE];
uindex_t t_size = META_HEAD_SIZE;
t_success = IO_NORMAL == MCS_read(t_head, sizeof(uint8_t), t_size, p_stream) &&
t_size == META_HEAD_SIZE;
if (t_success)
{
// graphics metafile (wmf)
if (memcmp(t_head, "\xD7\xCD\xC6\x9A", 4) == 0)
{
int16_t *t_bounds = (int16_t *)&t_head[6];
r_width = ((t_bounds[2] - t_bounds[0]) * 72 + t_bounds[4] - 1) / t_bounds[4];
r_height = ((t_bounds[3] - t_bounds[1]) * 72 + t_bounds[4] - 1) / t_bounds[4];
t_is_meta = true;
}
// win32 metafile (emf)
else if (memcmp(&t_head[40], "\x20\x45\x4D\x46", 4) == 0)
{
t_size = EMF_HEAD_SIZE;
t_success = IO_NORMAL == MCS_seek_set(p_stream, t_stream_pos) &&
IO_NORMAL == MCS_read(t_head, sizeof(uint8_t), t_size, p_stream) &&
t_size == EMF_HEAD_SIZE;
if (t_success)
{
int32_t *t_bounds;
t_bounds = (int32_t*)&t_head[72];
r_width = t_bounds[0];
r_height = t_bounds[1];
t_is_meta = true;
}
}
else
{
uindex_t t_offset = 0;
if (memcmp(t_head, "\0\0\0\0\0\0\0\0", 8) == 0)
{
t_size = META_HEAD_SIZE;
t_offset = 512;
t_success = IO_NORMAL == MCS_seek_set(p_stream, t_stream_pos + t_offset) &&
IO_NORMAL == MCS_read(t_head, sizeof(uint8_t), t_size, p_stream) &&
t_size == META_HEAD_SIZE;
}
// PICT file
if (t_success && memcmp(&t_head[10], "\0\021\002\377", 4) == 0)
{
uint16_t *t_bounds = (uint16_t *)t_head;
r_width = swap_uint2(&t_bounds[4]) - swap_uint2(&t_bounds[2]);
r_height = swap_uint2(&t_bounds[3]) - swap_uint2(&t_bounds[1]);
t_is_meta = true;
t_stream_pos += t_offset;
}
}
}
MCS_seek_set(p_stream, t_stream_pos);
return t_success && t_is_meta;
}
