You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
204 lines
6.0 KiB
204 lines
6.0 KiB
![]()
4 years ago
|
/*
|
||
|
File: CGDataProvider.h
|
||
|
|
||
|
Contains: CoreGraphics data provider
|
||
|
|
||
|
Version: QuickTime 7.3
|
||
|
|
||
|
Copyright: (c) 2007 (c) 2000-2001 by Apple Computer, Inc., all rights reserved.
|
||
|
|
||
|
Bugs?: For bug reports, consult the following page on
|
||
|
the World Wide Web:
|
||
|
|
||
|
http://developer.apple.com/bugreporter/
|
||
|
|
||
|
*/
|
||
|
#ifndef CGDATAPROVIDER_H_
|
||
|
#define CGDATAPROVIDER_H_
|
||
|
|
||
|
#ifndef __CGBASE__
|
||
|
#include <CGBase.h>
|
||
|
#endif
|
||
|
|
||
|
#ifndef __CFURL__
|
||
|
#include <CFURL.h>
|
||
|
#endif
|
||
|
|
||
|
|
||
|
|
||
|
|
||
|
#if PRAGMA_ONCE
|
||
|
#pragma once
|
||
|
#endif
|
||
|
|
||
|
#ifdef __cplusplus
|
||
|
extern "C" {
|
||
|
#endif
|
||
|
|
||
|
#if PRAGMA_IMPORT
|
||
|
#pragma import on
|
||
|
#endif
|
||
|
|
||
|
#if PRAGMA_STRUCT_ALIGN
|
||
|
#pragma options align=mac68k
|
||
|
#elif PRAGMA_STRUCT_PACKPUSH
|
||
|
#pragma pack(push, 2)
|
||
|
#elif PRAGMA_STRUCT_PACK
|
||
|
#pragma pack(2)
|
||
|
#endif
|
||
|
|
||
|
typedef struct CGDataProvider* CGDataProviderRef;
|
||
|
typedef CALLBACK_API_C( size_t , CGGetBytesProcPtr )(void *info, void *buffer, size_t count);
|
||
|
typedef CALLBACK_API_C( void , CGSkipBytesProcPtr )(void *info, size_t count);
|
||
|
typedef CALLBACK_API_C( void , CGRewindProcPtr )(void * info);
|
||
|
typedef CALLBACK_API_C( void , CGReleaseProviderProcPtr )(void * info);
|
||
|
/* Callbacks for sequentially accessing data.
|
||
|
* `getBytes' is called to copy `count' bytes from the provider's data to
|
||
|
* `buffer'. It should return the number of bytes copied, or 0 if there's
|
||
|
* no more data.
|
||
|
* `skipBytes' is called to skip ahead in the provider's data by `count' bytes.
|
||
|
* `rewind' is called to rewind the provider to the beginning of the data.
|
||
|
* `releaseProvider', if non-NULL, is called when the provider is freed. */
|
||
|
struct CGDataProviderCallbacks {
|
||
|
CGGetBytesProcPtr getBytes;
|
||
|
CGSkipBytesProcPtr skipBytes;
|
||
|
CGRewindProcPtr rewind;
|
||
|
CGReleaseProviderProcPtr releaseProvider;
|
||
|
};
|
||
|
typedef struct CGDataProviderCallbacks CGDataProviderCallbacks;
|
||
|
typedef CALLBACK_API_C( void *, CGGetBytePointerProcPtr )(void * info);
|
||
|
typedef CALLBACK_API_C( void , CGReleaseByteProcPtr )(void *info, const void *pointer);
|
||
|
typedef CALLBACK_API_C( size_t , CGGetBytesDirectProcPtr )(void *info, void *buffer, size_t offset, size_t count);
|
||
|
/* Callbacks for directly accessing data.
|
||
|
* `getBytePointer', if non-NULL, is called to return a pointer to the
|
||
|
* provider's entire block of data.
|
||
|
* `releaseBytePointer', if non-NULL, is called to release a pointer to
|
||
|
* the provider's entire block of data.
|
||
|
* `getBytes', if non-NULL, is called to copy `count' bytes at offset
|
||
|
* `offset' from the provider's data to `buffer'. It should return the
|
||
|
* number of bytes copied, or 0 if there's no more data.
|
||
|
* `releaseProvider', if non-NULL, is called when the provider is freed.
|
||
|
* At least one of `getBytePointer' or `getBytes' must be non-NULL. */
|
||
|
struct CGDataProviderDirectAccessCallbacks {
|
||
|
CGGetBytePointerProcPtr getBytePointer;
|
||
|
CGReleaseByteProcPtr releaseBytePointer;
|
||
|
CGGetBytesDirectProcPtr getBytes;
|
||
|
CGReleaseProviderProcPtr releaseProvider;
|
||
|
};
|
||
|
typedef struct CGDataProviderDirectAccessCallbacks CGDataProviderDirectAccessCallbacks;
|
||
|
typedef CALLBACK_API_C( void , CGReleaseDataProcPtr )(void *info, const void *data, size_t size);
|
||
|
/* Create a sequential-access data provider using `callbacks' to provide
|
||
|
* the data. `info' is passed to each of the callback functions. */
|
||
|
/*
|
||
|
* CGDataProviderCreate()
|
||
|
*
|
||
|
* Availability:
|
||
|
* Non-Carbon CFM: not available
|
||
|
* CarbonLib: not available
|
||
|
* Mac OS X: in version 10.0 and later
|
||
|
*/
|
||
|
EXTERN_API_C( CGDataProviderRef )
|
||
|
CGDataProviderCreate(
|
||
|
void * info,
|
||
|
const CGDataProviderCallbacks * callbacks);
|
||
|
|
||
|
|
||
|
/* Create a direct-access data provider using `callbacks' to supply `size'
|
||
|
* bytes of data. `info' is passed to each of the callback functions. */
|
||
|
/*
|
||
|
* CGDataProviderCreateDirectAccess()
|
||
|
*
|
||
|
* Availability:
|
||
|
* Non-Carbon CFM: not available
|
||
|
* CarbonLib: not available
|
||
|
* Mac OS X: in version 10.0 and later
|
||
|
*/
|
||
|
EXTERN_API_C( CGDataProviderRef )
|
||
|
CGDataProviderCreateDirectAccess(
|
||
|
void * info,
|
||
|
size_t size,
|
||
|
const CGDataProviderDirectAccessCallbacks * callbacks);
|
||
|
|
||
|
|
||
|
/* Create a direct-access data provider using `data', an array of `size'
|
||
|
* bytes. `releaseData' is called when the data provider is freed, and is
|
||
|
* passed `info' as its first argument. */
|
||
|
/*
|
||
|
* CGDataProviderCreateWithData()
|
||
|
*
|
||
|
* Availability:
|
||
|
* Non-Carbon CFM: not available
|
||
|
* CarbonLib: not available
|
||
|
* Mac OS X: in version 10.0 and later
|
||
|
*/
|
||
|
EXTERN_API_C( CGDataProviderRef )
|
||
|
CGDataProviderCreateWithData(
|
||
|
void * info,
|
||
|
const void * data,
|
||
|
size_t size,
|
||
|
CGReleaseDataProcPtr releaseData);
|
||
|
|
||
|
|
||
|
/* Create a data provider using `url'. */
|
||
|
/*
|
||
|
* CGDataProviderCreateWithURL()
|
||
|
*
|
||
|
* Availability:
|
||
|
* Non-Carbon CFM: not available
|
||
|
* CarbonLib: not available
|
||
|
* Mac OS X: in version 10.0 and later
|
||
|
*/
|
||
|
EXTERN_API_C( CGDataProviderRef )
|
||
|
CGDataProviderCreateWithURL(CFURLRef url);
|
||
|
|
||
|
|
||
|
/* Increment the retain count of `provider' and return it. All data
|
||
|
* providers are created with an initial retain count of 1. */
|
||
|
/*
|
||
|
* CGDataProviderRetain()
|
||
|
*
|
||
|
* Availability:
|
||
|
* Non-Carbon CFM: not available
|
||
|
* CarbonLib: not available
|
||
|
* Mac OS X: in version 10.0 and later
|
||
|
*/
|
||
|
EXTERN_API_C( CGDataProviderRef )
|
||
|
CGDataProviderRetain(CGDataProviderRef provider);
|
||
|
|
||
|
|
||
|
/* Decrement the retain count of `provider'. If the retain count reaches
|
||
|
* 0, then free `provider' and any associated resources. */
|
||
|
/*
|
||
|
* CGDataProviderRelease()
|
||
|
*
|
||
|
* Availability:
|
||
|
* Non-Carbon CFM: not available
|
||
|
* CarbonLib: not available
|
||
|
* Mac OS X: in version 10.0 and later
|
||
|
*/
|
||
|
EXTERN_API_C( void )
|
||
|
CGDataProviderRelease(CGDataProviderRef provider);
|
||
|
|
||
|
|
||
|
|
||
|
#if PRAGMA_STRUCT_ALIGN
|
||
|
#pragma options align=reset
|
||
|
#elif PRAGMA_STRUCT_PACKPUSH
|
||
|
#pragma pack(pop)
|
||
|
#elif PRAGMA_STRUCT_PACK
|
||
|
#pragma pack()
|
||
|
#endif
|
||
|
|
||
|
#ifdef PRAGMA_IMPORT_OFF
|
||
|
#pragma import off
|
||
|
#elif PRAGMA_IMPORT
|
||
|
#pragma import reset
|
||
|
#endif
|
||
|
|
||
|
#ifdef __cplusplus
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#endif /* CGDATAPROVIDER_H_ */
|
||
|
|