Plugins:NokiaMaemoImageSurface
Status
Accepted, ready for implementation. No NPAPI version number.
Problem Summary
We are proposing a NPAPI extension which would allow a plugin to render directly into 32-bit buffer in shared memory for performance reasons.
Specification
This extension is for the maemo platform only.
The plugin explicitly makes requests of the user agent whether the extension is supported (with NPN_GetValue and NPNVSupportsWindowlessLocal) and then enables the new rendering mode at runtime (with NPN_SetValue and NPPVpluginWindowlessLocalBool). In this way other plugins unaware of new extension will not be disrupted.
When new rendering mode is enabled the Xdrawable field of a standard XGraphicsExpose event holds a pointer to the new NPImageExpose structure which among other things contains pointer to the shared memory buffer, its dimensions, translation and scale factors.
typedef struct _NPImageExpose
{
char* data; /* image pointer */
int32 stride; /* Stride of data image buffer */
int32 depth; /* Depth of image pointer */
int32 x; /* Expose x */
int32 y; /* Expose y */
uint32 width; /* Expose width */
uint32 height; /* Expose height */
NPSize dataSize; /* Data buffer size */
float translateX; /* translate X matrix value */
float translateY; /* translate Y matrix value */
float scaleX; /* scale X matrix value */
float scaleY; /* scale Y matrix value */
} NPImageExpose;
The value of NPPVpluginWindowlessLocalBool is 2002, the value of NPNVSupportsWindowlessLocal is 2002. There is no NPAPI version assigned to this feature since it is queried for by variable and does not involve additional functions.
Also see discussion:
