The BLND attachment (Custom Blend-Mode Data) allows plug-ins that generate content with blend-modes not natively supported by Chasys Draw IES to define a custom mode to be used to render such content – the BLND tells Chasys Draw IES how to render the blend-mode. For example, Chasys Draw IES doesn’t have an equivalent for Photoshop’s “Soft Light” mode, so the flt_PSD plug-in adds BLND attachments that define the “Soft Light” mode to layers that need it.
#define META_BLND_VERSION 0x0001
struct meta_BLND_Obj
{
unsigned short version; //BLND version
unsigned short unused_1; //unused, set to zero
unsigned char type;
unsigned char mode;
unsigned short span;
unsigned long flags;
wchar_t name[32];
char unused_2[256-(12+64)];
};
The plug-in requests metadata of size sizeof(meta_BLND_Obj)+size_of_plugin_data. The plug-in then proceeds to fill the header with the type, the mode, the span, and a name in [namespace.Name] format (e.g. “photoshop.SoftLight”). The plug-in populates the rest of the space with the relevant data as defined by the type and span.
