Adobe Extending Flash Professional CS4 Manuale Utente Scaricare il pdf (Pagina 548)

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EXTENDING FLASH CS4 PROFESSIONAL

C-Level Extensibility

// Windows

__declspec( dllexport ) void MM_InitWrapper( MM_Environment *env, unsigned int envSize );

# endif

#else

extern void MM_InitWrapper( MM_Environment *env, unsigned int envSize );

#endif

#define MM_STATE\

/* Definitions of global variables */ \

MM_Environment mmEnv; \

void\

MM_InitWrapper(MM_Environment *env, unsigned int envSize) \

{ \

extern void MM_Init();\

char **envPtr = (char **)env; \

char **mmPtr =(char **)(&mmEnv);\

char **envEnd = (char **)((char *)envPtr + envSize);\

char **mmEnd =(char **)((char *)mmPtr+ sizeof(MM_Environment)); \

/* Copy fields from env to mmEnv, one pointer at a time */\

while (mmPtr < mmEnd && envPtr < envEnd)\

*mmPtr++ = *envPtr++; \

/* If env doesn't define all of mmEnv's fields, set extras to NULL */ \

while (mmPtr < mmEnd) \

*mmPtr++ = (char *)0; \

/* Call user's MM_Init function */\

MM_Init();\

} \

#endif /* _MM_JSAPI_H_ */

Sample DLL implementation

This section illustrates how to build a simple DLL implementation. If you want to see how the process works without

actually building the DLL yourself, you can install the sample DLL files that are provided in the Samples.zip file; the

files are located in the ExtendingFlash/dllSampleComputeSum folder. (For information on downloading the

Samples.zip file, see

“Sample implementations” on page 13.) Extract the sample files from the

dllSampleComputeSum.dmg or dllSampleComputeSum.zip file, and then do the following:

• Store the Sample.jsfl file in the Configuration/Commands directory (see “Saving JSFL files” on page 2).

• Store the Sample.dll file in the Configuration/External Libraries directory (see “Integrating C functions” on

page 522).

• In the Flash authoring environment, select Commands > Sample. The trace statement in the JSFL file sends the

results of the function defined in Sample.dll to the Output panel.

The rest of this section discusses the development of the sample. In this case, the DLL contains only one function,

which adds two numbers. The C code is shown in the following example:

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Adobe Extending Flash Professional CS4 Manuale Utente Pagina 548

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