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NPAPI:Pepper: Difference between revisions
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→Creating and Manipulating Buffers
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== Creating and Manipulating Buffers == | == Creating and Manipulating Buffers == | ||
Buffers are shared memory objects used to communicate data between processes in a multiprocess implementation. There are three fundamental operations | Buffers are shared memory objects associated with a specific device context that are used to communicate data between processes in a multiprocess implementation. There are three fundamental operations | ||
=== Creating a buffer === | === Creating a buffer === | ||
/* Create a buffer associated with a particular context. The usage of the */ | |||
/* buffer is device specific. The lifetime of the buffer is scoped with the */ | |||
/* lifetime of the context. */ | |||
typedef NPError (*NPDeviceCreateBufferPtr)( | |||
NPP instance, | |||
NPDeviceContext* context, | |||
size_t size, | |||
int32* id); | |||
=== Mapping a buffer === | === Mapping a buffer === | ||
/* Inserts the buffer into the address space of the caller. | |||
Unmapping implicitly happens when the buffer or context is destroyed. */ | |||
typedef struct _NPDeviceBuffer { | |||
void* ptr; | |||
size_t size; | |||
} NPDeviceBuffer; | |||
typedef NPError (*NPDeviceMapBufferPtr)( | |||
NPP instance, | |||
NPDeviceContext* context, | |||
int32 id, | |||
NPDeviceBuffer* buffer); | |||
=== Destroying a buffer === | === Destroying a buffer === | ||
/* Destroy a buffer associated with a particular context. */ | |||
typedef NPError (*NPDeviceDestroyBufferPtr)( | |||
NPP instance, | |||
NPDeviceContext* context, | |||
int32 id); | |||
== Optimizations and Legacy APIs == | == Optimizations and Legacy APIs == | ||