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== Background ==
We will use specifically sized types (int32_tint32, int16_tint16, int8_tint8, etc.) to avoid sizeof(int) and sizeof(wchar) differences between compilers and machine architectures, and have very strict padding and alignment specifications.
This specification is version 1.0 of events in Pepper. If future events are added, or additional fields are added to existing events, we'll need a way for the client applications to query (or negotiate) what version of events are supported by the browser. If significant changes are made to the event model, we may need to add additional trusted code to maintain backwards compatibility with existing plugin applications. This applies not only to new fields or changes to the ranges of existing fields, but is also especially important for changes or differences in behaviours across multiple operating systems (for example, are mouse movements reported outside the embedded area while a button is held down and the initial mouse down event occurred within the embedded area) Subsequent versions of Pepper events may need to support gesture & touch based events, such as finger pinching and stretching to support zoom in / zoom out for maps & photo editors.
