Ptex
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Custom handler interface for intercepting and redirecting Ptex input stream calls. More...
#include <Ptexture.h>
Public Types | |
typedef void * | Handle |
Public Member Functions | |
virtual Handle | open (const char *path)=0 |
Open a file in read mode. More... | |
virtual void | seek (Handle handle, int64_t pos)=0 |
Seek to an absolute byte position in the input stream. More... | |
virtual size_t | read (void *buffer, size_t size, Handle handle)=0 |
Read a number of bytes from the file. More... | |
virtual bool | close (Handle handle)=0 |
Close a file. More... | |
virtual const char * | lastError ()=0 |
Return the last error message encountered. More... | |
Custom handler interface for intercepting and redirecting Ptex input stream calls.
A custom instance of this class can be defined and supplied to the PtexCache class. Files accessed through the cache will have their input streams redirected through this interface.
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pure virtual |
Close a file.
Returns false if an error occurs, and the error string is available via lastError().
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pure virtual |
Return the last error message encountered.
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pure virtual |
Open a file in read mode.
Returns null if there was an error. If an error occurs, the error string is available via lastError().
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pure virtual |
Read a number of bytes from the file.
Returns the number of bytes successfully read. If less than the requested number of bytes is read, the error string is available via lastError().
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pure virtual |
Seek to an absolute byte position in the input stream.