Plugins:NokiaMaemoImageSurface
We are proposing a NPAPI extension which would allow a plugin to render directly into 32-bit buffer in shared memory. The new extension will be designed so that 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;
see discussion: